A large-tonnage ratio screening device

Abstract

The present application relates to a large tonnage specific gravity screening device, the input end of which inputs the material to be screened, the screening unit screens the material with different specific gravities, the screening power unit outputs the power matched with the current material to be screened, and the feedback control unit controls in real time based on the output material of the output end; the material to be screened enters the device from the input end, and different modes are selected for initialization based on the classification of the material to be screened; the material to be screened is input to the screening unit, and one or more output ends and the screening power unit are opened based on different mode control; the material to be screened travels to the output end, and the feedback control unit detects the wrong material and classifies the material output by the output end, and the input end, the screening unit and the screening power unit are linked based on the detection result. The present application effectively realizes material screening, can effectively classify the material based on demand, the material in the classification meets the requirements, the impurity rate is greatly reduced, the material can be directly labeled to avoid subsequent complex operation, the working efficiency is high, and the labor cost is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of separating solids from solids using fine sieves, coarse sieves, screening, or airflow; and to other dry separation methods applicable to bulk materials, particularly to a high-tonnage gravity screening device. Background Technology

[0002] A gravity screen, also known as a gravity cleaner, is a large machine used for screening materials, especially seeds. The screen surface of this screening equipment has a certain angle in both length and width. During operation, the screen surface vibrates, and the material falls onto the screen surface. Under the action of the airflow at the bottom of the screen surface, the material on the screen surface is stratified. The heavier material will be at the bottom of all the materials and will mainly move upward along the vibration direction, while the lighter material will float on the top layer of the material and will not contact the screen surface. Because the table has a certain angle, the material moves forward along the length of the screen bed and is eventually discharged from the outlet, achieving the purpose of cleaning or grading.

[0003] In existing technologies, although conventional gravity screening machines can achieve the purpose of screening materials, in actual operation, this screening often contains a certain proportion of impurities. Impurities not only refer to the mixing of light and heavy materials, but also to the inability to distinguish between light and heavy materials, and the inability to directly label the materials. This results in the need for manual processing after screening, including but not limited to detecting the impurity rate of the materials and labeling the materials before subsequent packaging and sealing operations. The work efficiency is not guaranteed, and the requirements for human experience are high. Summary of the Invention

[0004] This invention solves the problems existing in the prior art and provides a high-tonnage specific gravity screening device.

[0005] The technical solution adopted in this invention is a large-tonnage specific gravity screening device, the device comprising:

[0006] One feeding end is used to input the material to be screened, and a material distribution plate is provided in conjunction with the feeding end;

[0007] A screening unit is located below the feed end and is equipped with several output ends for screening materials of different specific gravities.

[0008] A screening power unit, located below the screening unit, is used to output power in accordance with the material to be screened.

[0009] A feedback control unit, in conjunction with one or more output terminals, is used to provide real-time feedback on the material output from the output terminals, thereby enabling control of the feed end, screening unit, and screening power unit.

[0010] The material to be screened enters the equipment from the feed end. Based on the classification of the material to be screened, different modes are selected and initialization is performed. The material to be screened is input to the screening unit. Based on different modes, one or more output ends and the screening power unit are controlled to start. The material to be screened moves to the output end. The feedback control unit performs mis-material detection and classification detection on the material output from the output end. Based on the detection result of the feedback control unit, the feed end, the screening unit and the screening power unit are linked.

[0011] Preferably, the screening unit includes an outer frame and a screen tensioned within the outer frame. Several baffles are provided on the outer frame of the screen, and any group of adjacent baffles forms an output end. One or more corners of the outer frame are mounted in the machine frame by cylinders.

[0012] Preferably, the screen comprises radial fibers and weft fibers, and the radial fibers along the material screening direction are provided with protrusions.

[0013] Preferably, the outer frame is a concave polygon, and the width of the outer frame below the feed end is smaller than the width of other parts of the outer frame.

[0014] Preferably, the screening power unit includes several cascaded air supply devices located in a frame under the outer frame, with a pressurization component between adjacent air supply devices; all the air supply devices are connected to a motor.

[0015] Preferably, the screening power unit further includes several vibrators, which are configured in conjunction with the outer frame 4.

[0016] Preferably, the screening power unit further includes several side holes on the outer frame, which are configured to cooperate with the return air pipe of the air supply device and the air outlet of the air supply device.

[0017] Preferably, the feedback control unit includes an output transfer cavity configured in conjunction with the output end, a sampling and detection device configured in conjunction with the output transfer cavity, and a discharge port and a unloading port configured in conjunction with the output transfer cavity.

[0018] Preferably, the sampling and detection device includes a sampling camera and a supplementary light located at the top of the output transfer cavity. The sampling camera captures images of the screened materials at the output end to detect incorrect materials. Based on the images of the screened materials, it obtains the outer contours of several complete materials for material grading detection.

[0019] Preferably, a pre-detection unit is provided in conjunction with the feed end for detecting the type of material to be screened; the pre-detection unit is configured in conjunction with the feedback control unit.

[0020] This invention relates to a high-tonnage specific gravity screening device. The device inputs the material to be screened at the feed end, which is equipped with a separating plate. A screening unit screens materials of different specific gravities, and a screening power unit outputs power to the material being screened. A feedback control unit provides real-time feedback based on the material output from the output end for control. The material to be screened enters the device from the feed end, and different modes are selected based on the material classification for initialization. The material to be screened is input to the screening unit, and one or more output ends and the screening power unit are activated based on different modes. The material to be screened travels to the output end, where the feedback control unit performs mis-material detection and classification detection. Based on the detection results of the feedback control unit, the feed end, screening unit, and screening power unit are linked.

[0021] The beneficial effects of this invention are as follows:

[0022] (1) The present invention can effectively screen materials and can effectively classify materials according to requirements. The materials within the classification meet the requirements and the impurity rate is greatly reduced.

[0023] (2) The present invention can directly set labels on materials through the control of the feedback control unit, avoiding subsequent complicated operations;

[0024] (3) The present invention has high work efficiency and reduced labor costs. Attached Figure Description

[0025] Figure 1 This is a top view structural diagram of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the screening power unit and the side hole of the outer frame of the present invention, wherein the arrows indicate the transmission direction of the air supply and return;

[0027] Figure 3 This is a schematic diagram showing the combination of radial and weft fibers in the screen of the present invention;

[0028] Figure 4 This is a schematic diagram of the radial fiber cross-sectional structure of the present invention. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to embodiments, but the scope of protection of the present invention is not limited thereto. Example 1

[0030] This embodiment relates to a high-tonnage specific gravity screening device, the device comprising:

[0031] A feeding end 1 is used to input the material to be screened, and a material distribution plate 2 is provided in conjunction with the feeding end 1;

[0032] A screening unit is located below the feed end 1 and is equipped with several output ends 3 for screening materials of different specific gravities.

[0033] A screening power unit, located below the screening unit, is used to output power in accordance with the material to be screened.

[0034] A feedback control unit, in conjunction with one or more output terminals 3, is used for real-time feedback of the material output from the output terminal 3 to control the feed terminal 1, the screening unit and the screening power unit;

[0035] The material to be screened enters the equipment from the feed end 1. Based on the classification of the material to be screened, different modes are selected and initialization is performed. The material to be screened is input to the screening unit. Based on different modes, one or more output ends 3 and the screening power unit are controlled to start. The material to be screened moves to the output end 3. The feedback control unit performs mis-material detection and classification detection on the material output from the output end 3. Based on the detection result of the feedback control unit, the feed end 1, the screening unit and the screening power unit are linked.

[0036] In this embodiment, the screening unit is a horizontally placed screening plane, generally with a certain angle of inclination. It is set below the feed end 1 and is equipped with several output ends 3 for screening materials of different specific gravities. Considering that the materials generally contain both light and heavy components, a distribution plate 2 is provided in conjunction with the feed end 1. The distribution plate 2 is set below the feed end 1 with a flat plate structure, generally tilted downwards and facing the screening unit. In this process, it works in conjunction with the screening power unit below the screening unit to output some of the extremely light materials first. Then, the other materials fall onto the screening unit at different speeds and are assisted to move along the length of the screening unit under the power of the screening power unit.

[0037] In this embodiment, unlike the prior art, a feedback control unit is set up. When the material to be screened enters the equipment from the feed end 1, it has already been classified once to select different modes and initialize. Subsequently, when the material to be screened moves to the output end 3, the feedback control unit performs mis-material detection and classification detection on the material output from the output end 3. Based on the detection results of the feedback control unit, the feed end 1, the screening unit and the screening power unit are linked. Based on the mis-material detection and classification detection, unloading or discharge can be selected, that is, the mode can be adjusted to continue screening or output to the next stage, which effectively shortens the manual processing time and reduces the difficulty of manual processing. Example 2

[0038] Based on Embodiment 1, the screening unit includes an outer frame 4 and a screen 5 stretched within the outer frame 4. The screen 5 is provided with several baffles 6 at the outer frame 4, and any group of adjacent baffles 6 forms an output end 3. One or more corners of the outer frame 4 are mounted in the frame (not shown in the figure) by cylinders 7.

[0039] The screen 5 includes radial fibers 51 and weft fibers 52, and the radial fibers 51 along the material screening direction are provided with protrusions 53.

[0040] The outer frame 4 is a concave polygon, and the width of the outer frame 4 below the feed end 1 is smaller than the width of other parts of the outer frame 4.

[0041] In this embodiment, the material at the feed end 1 falls onto the screen 5 inside the outer frame 4. The outer frame 4 is generally equipped with baffles to prevent the material, especially lightweight materials (generally effective materials), from bouncing out of the effective area. A baffle plate 6 is also set on one side of the outer frame 4. By setting the baffle plate 6, the material can be separated and transported to different output ends 3 according to different specific gravities as needed. As shown in the figure, in actual application, the number of baffle plates 6 is much more than 3, which can realize the subdivision of different grades of materials to be screened.

[0042] In this embodiment, due to the differences in the materials to be screened, cylinders 7 are set at the bottom corners of the outer frame 4 to adjust the lateral and longitudinal tilt angles of the screen 5 based on the actual screening requirements of the materials to be screened, so as to ensure the screening efficiency.

[0043] Traditional screens 5 typically only have radial fibers 51 and weft fibers 52. In this embodiment, protrusions 53 are further provided on the radial fibers 51 along the screening direction of the material to increase the bouncing efficiency of heavy objects, apply different degrees of friction to different lightweight materials, and effectively subdivide the material.

[0044] In this embodiment, the material to be screened falls in the smaller outer frame area 4, which allows the material to be fed in an adjustable manner based on its falling speed, screening efficiency, and screening effect, thereby achieving effective screening. Example 3

[0045] Based on Embodiment 2, the screening power unit includes several cascaded air supply devices 8 located in a frame under the outer frame 4, and a pressurization component 9 is provided between adjacent air supply devices 8; all the air supply devices 8 are connected to the motor 10.

[0046] The screening power unit also includes several vibrators (not shown in the figure), which are set in conjunction with the outer frame 4.

[0047] The screening power unit also includes several side holes 11 on the outer frame 4, which are configured to cooperate with the return air pipe 12 of the air supply device 8 and the air outlet 13 of the air supply device 8.

[0048] In this embodiment, several air supply devices 8 are cascaded. Here, the air supply device 8 is a blower. Cascading means that a pressurization component 9 is set between adjacent air supply devices 8. It is used to select whether to increase the air pressure of the next stage air supply device 8 under control. Firstly, it is more suitable for screening large-tonnage materials, ensuring the air supply efficiency of the terminal air supply device 8 and that all air supply devices 8 are at the same frequency. Secondly, it meets the air pressure adjustment of some air supply devices 8 and the grading adjustment of some materials to be screened. That is, within a certain specific gravity range, it can be output from the same output end 3, or it can be graded and output again as needed. On this basis, the vibrator is generally set with the outer frame 4. While pressurizing, the vibration of the outer frame 4 is enhanced. Alternatively, the vibrator can be used in conjunction with the pressurization component 9 to control the difference in pressurization (air supply).

[0049] In this embodiment, a plurality of side holes 11 are provided on the outer frame 4. The side holes 11 are configured to cooperate with the return air pipe 12 and the air outlet 13 of the air supply device 8.

[0050] When used in conjunction with the return air duct 12 of the air supply device 8, the side hole 11 is mainly set on one side of the output end 3 to facilitate the rapid output of materials and supplement the air supply of the air supply device 8, thereby reducing site noise and saving energy; the return air duct 12 generally transports the return air back to the first-stage air supply device 8.

[0051] When the air outlet 13 of the air supply device 8 is connected with the air supply pipe 19, the side hole 11 is mainly set on the side where the output end 3 is not set, and is used to collect materials in a certain area, especially light materials, to improve screening efficiency. Example 4

[0052] Based on Embodiment 1, the feedback control unit includes an output transfer cavity 14 configured in conjunction with the output terminal 3, a sampling and detection device configured in conjunction with the output transfer cavity 14, and a discharge port 15 and a discharge port 16 configured in conjunction with the output transfer cavity 14.

[0053] The sampling and detection device includes a sampling camera 17 and a supplementary light 18 located on the top of the output transfer cavity 14. The sampling camera 17 collects images of the screened materials at the output end 3 to perform mis-material detection. Based on the images of the screened materials, it obtains the outer contours of several complete materials to perform material grading detection.

[0054] In this embodiment, in order to effectively confirm whether the output material of output terminal 3 meets the requirements, and thus characterize whether the configuration and indication of the equipment need to be adjusted, an output transfer cavity 14 is set below output terminal 3. A sampling and detection device is set in this output transfer cavity 14, including a sampling camera 17 and a supplementary light 18 located at the top of the output transfer cavity 14, for collecting images of the screened materials of output terminal 3. The output materials here are generally overlapping, so the wrong material detection can be realized based on this image. Existing conventional image recognition software can be used to obtain the classification information of the output materials. Based on this classification information, it can be determined whether there are materials that are not theoretically supposed to be output by the current output terminal 3. Furthermore, based on these images, the (interlaced) outer contour of the materials can be obtained. Based on the outer contour, the length, width, shape and whether there are obvious defects in the material can be detected, thereby realizing automatic material grading detection. For example, seeds of different lengths and widths can reflect their fullness and growth status, while seeds with smooth and flat outer contours are obviously better than seeds with gaps.

[0055] In this embodiment, the discharge port 15 or the unloading port 16 can be opened by detecting incorrect materials. Opening the discharge port 15 indicates that the material output from the current output end 3 is compliant and can be output to the next process. At this time, the pre-classification is performed based on the classification detection results, which greatly reduces the operational complexity of subsequent processes. Opening the unloading port 16 indicates that the material output from the current output end 3 is non-compliant, and there may be a problem with the overall equipment settings. Adjustments are made through the feed end 1, the screening unit and the screening power unit. The current (small amount) of material at the output end 3 is then unloaded through the unloading port 16 or recycled back to the feed end 1 for re-screening. Example 5

[0056] Based on Example 1, a pre-detection unit is provided in conjunction with the feed end 1 to detect the type of material to be screened; the pre-detection unit is set up in conjunction with the feedback control unit.

[0057] In this embodiment, a pre-detection unit is set at the feed end 1, which is generally a camera or the like. It transmits the image to the feedback control unit. Using existing conventional image recognition software, it can obtain the preliminary classification information of the output material, which is the pre-detection information. This information is used to detect the type of material to be screened, such as seeds, gravel, and debris (other lightweight materials). The pre-detection information of the pre-detection unit and the detection information at the output end 3 of the feedback control unit are used to achieve information coordination and further control the operation of the equipment.

[0058] When the material at the feed end 1 is detected to include seeds, gravel, and debris, the configuration of the pre-set screening unit and screening power unit is configured so that the seeds, gravel, and debris are output from different output ends 3. At this time, the feedback control unit reports whether one or more output ends 3 have output the material that matches the plan. Based on this feedback information, it can be confirmed whether the material output by the output end 3 is accurate, and it can be further confirmed whether the grading of the material output by the output end 3 corresponds to the configuration when the material output by the output end 3 is accurate.

[0059] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-tonnage specific gravity screening device, characterized in that: The device includes: One feeding end is used to input the material to be screened, and a material distribution plate is provided in conjunction with the feeding end; A screening unit is located below the feed end and is equipped with several output ends for screening materials of different specific gravities. The screening unit includes an outer frame and a screen tensioned within the outer frame. Several baffles are provided on the outer frame of the screen, and any group of adjacent baffles forms an output end. One or more corners of the outer frame are mounted inside the machine frame by cylinders. A screening power unit, located below the screening unit, is used to output power to the material to be screened. The screening power unit includes several cascaded air supply devices in a frame located under the outer frame, with a pressurization component between adjacent air supply devices. All the air supply devices are connected to a motor. The unit also includes several vibrators, which are configured to cooperate with the outer frame. Furthermore, the unit includes several side holes in the outer frame, which are configured to cooperate with the return air pipes and air outlets of the air supply devices. A feedback control unit, in conjunction with one or more output terminals, is used to provide real-time feedback on the material output from the output terminals, thereby enabling control of the feed end, screening unit, and screening power unit. The material to be screened enters the equipment from the feed end. Based on the classification of the material to be screened, different modes are selected and initialization is performed. The material to be screened is input to the screening unit. Based on different modes, one or more output ends and the screening power unit are controlled to start. The material to be screened moves to the output end. The feedback control unit performs mis-material detection and classification detection on the material output from the output end. Based on the detection result of the feedback control unit, the feed end, the screening unit and the screening power unit are linked.

2. The high-tonnage specific gravity screening device according to claim 1, characterized in that: The screen includes radial fibers and weft fibers, and the radial fibers along the material screening direction have protrusions.

3. The high-tonnage specific gravity screening device according to claim 1, characterized in that: The outer frame is a concave polygon, and the width of the outer frame below the feed end is smaller than the width of other parts of the outer frame.

4. The high-tonnage specific gravity screening device according to claim 1, characterized in that: The feedback control unit includes an output transfer cavity configured in conjunction with the output end, a sampling and detection device configured in conjunction with the output transfer cavity, and a discharge port and a unloading port configured in conjunction with the output transfer cavity.

5. The high-tonnage specific gravity screening device according to claim 4, characterized in that: The sampling and detection device includes a sampling camera and a supplementary light located at the top of the output transfer cavity. The sampling camera captures images of the screened materials at the output end to detect incorrect materials. Based on the images of the screened materials, it obtains the outer contours of several complete materials for material grading detection.

6. The high-tonnage specific gravity screening device according to claim 1, characterized in that: The feed end is equipped with a pre-detection unit for detecting the type of material to be screened; the pre-detection unit is configured in conjunction with the feedback control unit.

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