Grain sampling and impurity removing device and sampling system

Abstract

The utility model discloses a grain sampling and impurity removing device and a sampling system, and belongs to the technical field of grain sampling, and the grain sampling and impurity removing device comprises an impurity removing hopper used for receiving grain samples; the vibrating screen assembly is communicated with a discharge hole of the impurity removal hopper; the vibrating screen assembly is provided with a plurality of output ports and is used for outputting impurities and impurity-removed grain samples; the screen face of the vibrating screen assembly is parallel to the horizontal plane, the vibrating screen assembly is connected with the control mechanism, and the control mechanism drives the screen face of the vibrating screen assembly to eccentrically shake around the normal of the horizontal plane. The grain sample screening time is prolonged through the horizontal screen surface, the grain sample screening uniformity and spatiality are improved in combination with eccentric shaking, and the impurity screening sufficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of grain sampling technology, specifically to a grain sampling and impurity removal device and sampling system. Background Technology

[0002] Grain sampling refers to the process of extracting representative samples from bulk grains according to certain standards and methods during grain storage and circulation for quality inspection. The purpose of sampling is to ensure that the test results accurately reflect the overall quality of the grain, thereby providing a basis for grain security management.

[0003] In the prior art, Chinese patent document CN221124608U discloses a grain testing system, which includes a vibrating screen for removing impurities from grain. The vibrating screen comprises an upper vibrating screen and a lower vibrating screen, with the lower screen positioned below the upper screen. The upper and lower screens are connected by a channel for conveying grain samples. The upper screen separates large impurities from the grain sample, while the lower screen separates small impurities. Both the upper and lower screens are drum-type vibrating screens and are inclined relative to the horizontal plane.

[0004] The aforementioned patent literature uses an inclined drum vibrating sieve to remove impurities from grains. Due to gravity, the grain sample stays on the sieve surface for too short a time and is quickly discharged before it can be fully sieved. Furthermore, the projected size of the sieve openings in the vertical direction becomes smaller, making it even more difficult for "hard-to-sieve particles" close to the sieve opening size to pass through. Therefore, an inclined drum vibrating sieve easily leads to insufficient sieving of impurities in the grain sample. Utility Model Content

[0005] The purpose of this utility model is to provide a grain sampling and impurity removal device and sampling system, which solves the problem that the inclined drum vibrating screen in the existing grain sampling system easily leads to insufficient screening of impurities in the grain sample.

[0006] To achieve the above objectives, this utility model provides a grain sampling and impurity removal device, comprising:

[0007] Impurity hopper, used to receive grain samples;

[0008] A vibrating screen assembly is connected to the discharge port of the impurity removal hopper; the vibrating screen assembly is provided with several output ports for outputting impurities and grain samples after impurity removal.

[0009] The screen surface of the vibrating screen assembly is parallel to the horizontal plane. The vibrating screen assembly is connected to the operating mechanism, which drives the screen surface of the vibrating screen assembly to eccentrically oscillate around the normal of the horizontal plane.

[0010] Furthermore, the operating mechanism includes a base, a polarization motor, and an elastic support. The base is spaced apart from the vibrating screen assembly and connected to it via the elastic support. One end of the polarization motor is connected to the base, and the other end is connected to the vibrating screen assembly. The operation of the polarization motor causes the vibrating screen assembly to shake.

[0011] Furthermore, the vibrating screen assembly includes, from top to bottom, a first screen body, a second screen body, and a screen bottom layer, wherein the first screen body is connected to the second screen body, and the second screen body is connected to the screen bottom layer.

[0012] Furthermore, the diameter of the sieve holes in the first sieve body is larger than the diameter of the sieve holes in the second sieve body.

[0013] Furthermore, the diameter of the sieve holes in the first sieve body is 3.5mm to 4.8mm, and the diameter of the sieve holes in the second sieve body is 1mm to 2.5mm.

[0014] Furthermore, the first screen body, the second screen body, and the bottom screen are respectively provided with a first output port, a second output port, and a third output port, which are staggered.

[0015] Furthermore, the impurity removal device is equipped with a first weighing module and a second weighing module. The first weighing module is connected to the impurity removal hopper, and the second weighing module is connected to the output end of the vibrating screen assembly.

[0016] Furthermore, the impurity removal device is equipped with an impurity removal fan, which is connected to the vibrating screen assembly.

[0017] Furthermore, the impurity removal device is equipped with an impurity collection device and a fine grain collection device, which are respectively connected to different output ports of the vibrating screen assembly.

[0018] This utility model also provides a grain sampling system, including the above-mentioned impurity removal device.

[0019] Compared with existing known technologies, the technical solution provided by this utility model has the following beneficial effects:

[0020] This invention relates to a grain sampling and impurity removal device. The vibrating screen assembly has a screen surface parallel to the horizontal plane, allowing grain samples to be dispersed across the screen surface and preventing excessive concentration in any one location due to gravity. The horizontal screen surface allows the grain samples to remain on the screen for a longer period, increasing the sieving time and ensuring thorough separation of the grain samples and impurities. Furthermore, the projected size of the screen openings in the vertical direction is the same as the actual size of the openings, easily removing particles close to the screen opening size.

[0021] The eccentric shaking of the sieve surface causes the grain sample to diffuse from the center of the sieve to the surrounding area. When the grain sample collides with the sieve wall at the edge of the sieve surface, it is bounced back by the force, which can break up slightly clumped sample particles. This shaking and collision can make the grain sample three-dimensionally layered, allowing impurities of different weights and sizes to have more opportunities to be located in different spatial positions in three-dimensional space—lighter ones float to the top and heavier ones sink to the bottom, which improves the sieving efficiency.

[0022] It is obvious that the elements or features described in the above individual embodiments can be used alone or in combination in other embodiments. Attached Figure Description

[0023] The dimensions and scales in the accompanying drawings do not represent the dimensions and scales of the actual product. The drawings are for illustrative purposes only, and some non-essential elements or features have been omitted for clarity.

[0024] Figure 1 This is a schematic diagram of the structure of the impurity removal device in the frame in an embodiment of this utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the impurity removal device in an embodiment of this utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the operating mechanism connected to the vibrating screen assembly in an embodiment of this utility model.

[0027] Explanation of reference numerals in the attached figures

[0028] 100. Impurity removal hopper;

[0029] 200, Vibrating screen assembly; 210, First screen body; 211, First output port; 220, Second screen body; 221, Second output port; 230, Screen bottom layer; 231, Third output port; 240, Base; 250, Elastic support component; 260, Polarizing motor; 261, Eccentric wheel;

[0030] 300. Impurity removal fan; 400. Impurity collection device; 500. Fine grain collection device. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the accompanying drawings. The embodiments described herein are merely preferred embodiments of the present invention. Those skilled in the art can conceive of other ways to implement the present invention based on the preferred embodiments, and such other ways also fall within the scope of the present invention.

[0032] Reference Figures 1-2This embodiment provides a grain sampling and impurity removal device, including a removal hopper 100 and a vibrating screen assembly 200, both mounted on a frame. The removal hopper 100 receives grain samples, and the vibrating screen assembly 200 is connected to the outlet of the removal hopper 100 to remove impurities from the grain samples delivered by the removal hopper 100. The vibrating screen assembly 200 has several output ports for outputting impurities and the removed grain samples. The screen surface of the vibrating screen assembly 200 is parallel to the horizontal plane, allowing the grain samples to be dispersed on the screen surface and preventing excessive concentration in one location due to gravity. The horizontal screen surface allows the grain samples to remain on the screen surface for a longer period, increasing the sieving time and ensuring thorough sieving of the grain samples, resulting in more complete separation of impurities from the grain samples. The projected size of the screen holes in the vertical direction is the same as the actual size of the screen holes, easily removing particles close to the size of the screen holes.

[0033] The vibrating screen assembly 200 is connected to the operating mechanism, which drives the screen surface of the vibrating screen assembly 200 to eccentrically oscillate around the normal of the horizontal plane. The eccentric oscillation of the screen surface causes the grain sample to diffuse from the center of the screen to the surrounding area. When the grain sample collides with the screen wall at the edge of the screen surface, it is bounced back by the force, which can break up slightly agglomerated sample particles. This oscillation and collision can make the grain sample three-dimensionally stratified, allowing impurities of different weights and sizes (such as light chaff, heavy sand and gravel, and slender grass seeds) to have a greater chance to be located in different spatial positions in three-dimensional space—lighter ones float to the top and heavier ones sink to the bottom, thus achieving proper sieving and improving sieving efficiency.

[0034] As another implementation of the control mechanism, such as Figure 3 As shown, the operating mechanism includes a base 240, a polarization motor 260, and an elastic support 250. The base 240 is spaced apart from the vibrating screen assembly 200 and connected by the elastic support 250. One end of the polarization motor 260 is connected to the base 240, and the other end is connected to the vibrating screen assembly 200. The operation of the polarization motor 260 causes the vibrating screen assembly 200 to shake. Specifically, as... Figure 3 As shown, the output end of the polarization motor 260 is located inside the base 240, and the output shaft of the output end is connected to an eccentric wheel 261, which is connected to the inside of the base 240. One end of the polarization motor 260 opposite to the output end is connected to the vibrating screen assembly 200 by bolts.

[0035] The polarization motor 260 drives the eccentric wheel 261 to rotate within the base 240, which defines the rotational trajectory of the eccentric wheel 261. Because motion is relative, the polarization motor 260 undergoes relative eccentric motion simultaneously with the rotation of the eccentric wheel 261, thereby causing the vibrating screen assembly 200 to sway. The elastic support member 250 serves both to support the vibrating screen assembly 200 and to elastically pull and restore it to its original position during eccentric swaying.

[0036] Understandably, the elastic support 250 can be a cylindrical helical spring, connected to the frame to form an elastic system, allowing the vibrating screen assembly 200 to move in multiple directions. With the combination of the polarization motor 260 and the elastic support 250, the vibration has both a vertical throwing action, which is beneficial for cleaning impurities and screening; and a horizontal rotational motion, which is beneficial for the diffusion and flow of materials on the screen surface. Furthermore, the polarization motor 260 can control the vibration direction of the vibrating screen assembly 200, first rotating clockwise for one minute and then counterclockwise for one minute. This can accelerate the discharge rate, reduce residual material in the screen body, and improve impurity removal efficiency.

[0037] In some embodiments, the vibrating screen assembly 200 includes, from top to bottom, a first screen body 210, a second screen body 220, and a bottom screen 230. The first screen body 210 is connected to the second screen body 220, and the second screen body 220 is connected to the bottom screen 230. Specifically, the first screen body 210 is located above the second screen body 220, and the diameter of the screen openings in the first screen body 210 is larger than that in the second screen body 220. The first screen body 210 vibrates to remove larger impurities, and the grain sample falls from the first screen body 210 onto the second screen body 220. The second screen body 220 vibrates to remove smaller impurities, and the grain sample remains on the second screen body 220. Impurities smaller than the grain sample fall into the bottom screen 230 to await discharge.

[0038] Furthermore, the screen aperture diameter of the first screen body 210 is 3.5mm~4.8mm, specifically 3.5mm, 3.6mm, 3.8mm, 4mm, 4.2mm, 4.3mm, 4.5mm, 4.6mm, and 4.8mm. The screen aperture diameter of the second screen body 220 is 1mm~2.5mm, specifically 1mm, 1.2mm, 1.5mm, 1.8mm, 2mm, 2.2mm, and 2.5mm. Different screen aperture diameters allow for the screening of grains of different sizes, and different screen aperture diameters can be used for different grain sizes in the vibrating screen assembly 200.

[0039] It is understandable that the first screen body 210, the second screen body 220, and the bottom screen 230 are respectively provided with a first output port 211, a second output port 221, and a third output port 231, which are staggered. This staggered arrangement facilitates the arrangement of output pipes (not shown in the figure) at different locations, making reasonable use of equipment space.

[0040] In some embodiments, the impurity removal device includes a first weighing module and a second weighing module. The first weighing module is connected to the impurity removal hopper 100. Specifically, the first weighing module can be located outside the impurity removal hopper 100, with the hopper 100 mounted on a frame, to measure the weight of the sample in the hopper 100, i.e., the weight of the grain sample before impurity removal. The second weighing module is connected to the output end of the vibrating screen assembly 200 and is used to weigh the grain sample after impurity removal. Specifically, the second weighing module can be placed on a platform, and the second weighing module is connected to the output end of the vibrating screen assembly 200 via a pipe, allowing the impurity-removed grain sample to fall onto the second weighing module for weighing. By comparing the weights of the grain sample before and after impurity removal, the impurity content of the grain sample is calculated.

[0041] In some embodiments, the impurity removal device is equipped with an impurity removal fan 300, which is connected to the vibrating screen assembly 200. When the grain falls onto the first screen body 210, a suction structure, namely the impurity removal fan 300, is added along the falling path to remove light impurities such as dust and wheat bran from the grain.

[0042] Understandably, the impurity removal device includes an impurity collection device 400 and a refined grain collection device 500. These two devices are connected to different output ports of the vibrating screen assembly 200 via pipes (not shown in the attached diagram). Both the impurity collection device 400 and the refined grain collection device 500 are funnel-shaped and have discharge ports. Impurities and refined grains are fed into these separate devices through these ports. The impurity collection device 400 and the refined grain collection device 500 separate the impurities from the removed refined grains, weigh the raw grain and the removed refined grains, and then calculate the difference in impurity mass, followed by the impurity content calculation. Simultaneously, the impurity collection device 400 can collect light, large, and small impurities, weigh their mass, and compare this mass with the previous two data points to improve measurement accuracy.

[0043] Another aspect of this utility model provides a grain sampling system, including the aforementioned impurity removal device. It is understood that this grain sampling system includes all the technical features and beneficial effects of the aforementioned impurity removal device, which will not be repeated here.

[0044] In the description of this utility model, it should be noted that the terms "front," "rear," "left," "right," "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] The scope of protection of this utility model is defined only by the claims. Thanks to the teachings of this utility model, those skilled in the art will readily recognize that alternative structures to the disclosed structure can be used as feasible alternative implementations, and that the disclosed implementations can be combined to produce new implementations, which also fall within the scope of the appended claims.

Claims

1. A grain sampling and impurity removing device, comprising an impurity removing hopper (100) for receiving a grain sample; a vibrating screen assembly (200) in communication with a discharge port of the impurity removing hopper (100); the vibrating screen assembly (200) is provided with a plurality of output ports for outputting impurities and the grain sample after impurity removal; characterized in that a screen surface of the vibrating screen assembly (200) is parallel to a horizontal plane, the vibrating screen assembly (200) is connected with a control mechanism, the control mechanism drives the screen surface of the vibrating screen assembly (200) to swing eccentrically around a normal line of the horizontal plane; the control mechanism comprises a base (240), a vibration motor (260) and an elastic support (250), the base (240) is spaced apart from the vibrating screen assembly (200) and connected by the elastic support (250); one end of the vibration motor (260) is connected with the base (240), and the other end is connected with the vibrating screen assembly (200), and the vibration motor (260) drives the vibrating screen assembly (200) to swing.

2. The grain sample impurity removing device according to claim 1, characterized in that, The vibrating screen assembly (200) comprises a first screen body (210), a second screen body (220) and a screen bottom layer (230) from top to bottom, the first screen body (210) is in communication with the second screen body (220), and the second screen body (220) is in communication with the screen bottom layer (230).

3. The grain sample impurity removing device according to claim 2, characterized in that, The screen hole diameter of the first screen body (210) is larger than that of the second screen body (220).

4. The grain sample impurity removing device according to claim 3, characterized in that, The screen hole diameter of the first screen body (210) is 3.5mm-4.8mm, and the screen hole diameter of the second screen body (220) is 1mm-2.5mm.

5. The grain sample impurity removing device according to claim 2, wherein The first screen body (210), the second screen body (220) and the screen bottom layer (230) are respectively provided with a first output port (211), a second output port (221) and a third output port (231), and the first output port (211), the second output port (221) and the third output port (231) are staggered.

6. The grain sample impurity removing device according to claim 1, wherein The impurity removing device is provided with a first weighing module and a second weighing module, the first weighing module is connected with the impurity removing hopper (100), and the second weighing module is connected with an output end of the vibrating screen assembly (200).

7. The grain sample probe and impurity removing device according to claim 1, characterized in that, The impurity removing device is provided with an impurity removing fan (300), and the impurity removing fan (300) is in communication with the vibrating screen assembly (200).

8. The grain sample probe and impurity removing device according to claim 1, characterized in that, The impurity removing device is provided with an impurity collecting device (400) and a fine grain collecting device (500), and the impurity collecting device (400) and the fine grain collecting device (500) are respectively connected with different output ports of the vibrating screen assembly (200).

9. A grain sampling system characterized by, The impurity removing device according to any one of claims 1-8.

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