Chute mechanism for screening polyethylene particles
By adopting a colored acrylic chute and partition plate design, combined with a vibrating feed trough and a cleaning air knife, the accuracy of particle conveying and photoelectric detection in the prior art is solved, the efficiency of particle conveying and photoelectric identification in the prior art is reduced, and the screening efficiency is improved.
Patent Information
- Application Number
- CN202520006102.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-01-02
AI Technical Summary
In existing polyethylene particle screening equipment, the chute structure cannot effectively prevent particle stacking and lateral movement, which affects photoelectric recognition efficiency and is inconvenient to clean, resulting in a high rate of missed detection.
The design incorporates colored acrylic sluices and partitions, combined with a vibrating feed trough and a cleaning air knife, to form a single-layer flat particle conveying channel. A background plate is provided by photoelectric detection, and the cleaning air knife prevents dust from affecting the process, thus improving recognition efficiency.
This technology enables single-layer flat particle conveying, reduces lateral displacement, improves the recognition efficiency of photoelectric detection, lowers the rate of missed detections, enhances the accuracy of photoelectric detection and equipment recognition, reduces the rate of false detections and missed detections, and improves screening efficiency.
Smart Images
Figure CN223751659U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to polyethylene production technical field, especially a chute mechanism for polyethylene particle screening. BACKGROUND
[0002] High-density polyethylene resin is one of important chemical raw materials, and can adopt injection, extrusion, blow molding and rotation molding etc. method to form plastic products. Because of uncontrollable factors such as processing raw material impurities and forming time, temperature etc. during processing, when high-density polyethylene particles are produced, inferior particle phenomenon such as color particle and black point color particle exists in the produced particles, which causes negative influence on subsequent product reprocessing. In the face of existing problems, inferior particle is usually removed by artificial sampling inspection and large plane grain lamp illumination general inspection mode, and the laying process is complex and tedious, and the laying is easy to cause particle lamination to cause material layer quality fluctuation to be larger, manual work intensity is high, and the detection quality is directly influenced by artificial factors, and causes the high missing rate of this kind of mode.
[0003] Polyethylene sorting color sorter relies on the optical performance difference of different particles with different gray scales, and uses photoelectric system to identify particles in different gray scale ranges, so as to realize the screening of inferior polyethylene particles containing color or black points. At present, the existing technology also improves the quality of polyethylene product particles through color sorter equipment.
[0004] The existing color sorter equipment usually uses conveying belt, chute etc. structure, and the existing chute structure usually uses U-shaped groove or W-shaped groove, which can further control the conveying track of the material while conveying the material, but the existing chute cannot clean the plate surface, and the existing groove structure generally has the situation of "particle stacking", which will cause certain influence on photoelectric identification, and the stain of inferior polyethylene particles is very small, which needs to be analyzed and identified at different angles and surfaces during falling, and the existing chute cannot realize it at one time, and often needs to be screened repeatedly for many times, increasing the time and labor cost.
[0005] Therefore, a chute mechanism for polyethylene particle screening is needed, which can avoid the influence of "particle stacking" and particle transverse movement, jumping etc. on photoelectric identification efficiency, and can effectively clean the chute plate surface according to the need, so as to further improve the photoelectric identification efficiency.
[0006] The information disclosed in this BACKGROUND section is only for the purpose of increasing the understanding of the background of the utility model and should not be regarded as an acknowledgment or any form of suggestion that this information forms prior art that is publicly known. UTILITY MODEL CONTENT
[0007] The utility model discloses a chute mechanism for polyethylene particle screening, through the separation design of the colored acrylic slide plate, not only can provide the rolling channel of limiting horizontal movement for particle falling, but also can provide the background plate color surface for photoelectric detection, through setting the feeding groove with vibrator, can create the condition of " single layer paving " of rolling for the slide plate, thereby effectively improving the photoelectric identification efficiency of single screening.
[0008] Another purpose of the utility model lies in that the slide plate can be cleaned by external air source through the setting of the cleaning wind knife, thereby further ensuring the photoelectric identification efficiency of particle screening.
[0009] To realize the above-mentioned purpose, the utility model provides a chute mechanism for polyethylene particle screening, which is arranged in a polyethylene color sorter and at least comprises: a horizontal feeding unit, which comprises a vibratable feeding groove, and single layer paving polyethylene particles can be formed on the surface of the feeding groove; a colored acrylic slide plate, which has a single frosted surface and is arranged in a light-transmitting mode, and the upper end of the slide plate is connected to the feeding groove in a smooth transition mode, the slide plate is divided into channels by a separation plate arranged along the rolling direction of the particles, and the separation plates are arranged in uniform intervals.
[0010] Further, in the above technical solution, the chute mechanism can further comprise: a cleaning wind knife arranged at a corresponding position on the upper end of the colored acrylic slide plate, the air inlet size of the cleaning wind knife is adapted to the use width of the slide plate, and the cleaning wind knife is arranged at a certain angle with the plane of the slide plate; the cleaning wind knife can be supplied with air by an external air source.
[0011] Further, in the above technical solution, the colored acrylic slide plate and the separation plate can be fixed by a back plate.
[0012] Further, in the above technical solution, at least two rows of slots can be arranged on the surface of the colored acrylic slide plate, and correspondingly, the one end of each separation plate is provided with a rectangular ring matched with the position of the slot; after the rectangular ring of each separation plate is inserted into the slot, a horizontally extending fixing plate can be inserted into the rectangular ring of the corresponding row and fixed on the back plate.
[0013] Further, in the above technical solution, baffles can be arranged on the left and right sides of the colored acrylic slide plate, the length of the baffle is adapted to the length of the colored acrylic slide plate, and the area between the two baffles is a limiting area for particle rolling. The fixing mode of the baffle can be the same as that of the separation plate.
[0014] Further, in the above technical solution, the lower end of the separation plate is aligned with the lower end of the colored acrylic slide plate; the upper end of the separation plate can be left with a certain interval from the upper end of the colored acrylic slide plate, and the upper end of the separation plate preferably adopts a tapered structure for ensuring the smooth falling of the particles from the feeding groove.
[0015] Further, in the above technical solution, the cleaning wind knife can be fixed on the upper end of the back plate.
[0016] Further, in the above technical solution, the left and right sides of the lower end of the back plate can be provided with a material collecting structure, which is aligned with the side of the colored acrylic chute plate and fixed on the back plate, and can be used for collecting particles falling from the non-passageway.
[0017] Further, in the above technical solution, the color of the colored acrylic chute plate can be blue (preferably dark blue), which can provide a background plate color for photoelectric detection during particle falling.
[0018] Further, in the above technical solution, the inclination angle of the colored acrylic chute plate can be set to about 30°; the thickness of the chute plate can be set to about 3mm, and the width of the chute plate can be set to about 1200mm*630mm, and the distance between adjacent partition plates can be about 50mm.
[0019] Compared with the prior art, the utility model has the following beneficial effects:
[0020] 1) The utility model discloses a horizontal feeding unit with a vibratable feeding groove, which can obtain single-layered and flatly laid polyethylene particles and create conditions for the uniform and flatly laid particle state on the chute plate.
[0021] 2) The single-sided frosted design of the colored acrylic chute plate increases the friction of the use surface, so that the particles are always in a rolling state during falling, which facilitates the industrial area array camera to capture particle images as needed during photoelectric detection, and provides favorable conditions for the area array camera to shoot different surfaces of the particles.
[0022] 3) The colored acrylic chute plate has good light transmission performance, which can avoid image shadows as much as possible during photoelectric detection, and can further improve the particle recognition efficiency of photoelectric detection.
[0023] 4) The partition plate of the colored acrylic chute plate divides the plate surface into regions, which can make the particles on the chute plate roll down more uniformly and avoid large horizontal displacement of the particles.
[0024] 5) The specific setting mode of the color selection, interval distance and width of the partition plate of the colored acrylic chute plate can create better conditions for identifying inferior particles during photoelectric detection.
[0025] 6) The sharp collecting structure at the upper end of the partition plate can ensure smooth falling of the particles from the feeding groove without violent jumping due to collision, which can effectively reduce the difficulty of subsequent photoelectric detection and identification and sorting of inferior particles.
[0026] 7) The setting of the plate cleaning air knife and the gas supply by the external gas source can perform timed blowing on the colored acrylic slide plate, prevent dust and other factors from affecting photoelectric detection and identification during production, improve the identification accuracy of the color sorter, and reduce the false detection rate.
[0027] 8) The design of the special-shaped aggregate structure can collect the particles that do not fall through the channel and prevent the particles from falling into the color sorter.
[0028] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model and can be implemented according to the content of the specification, at the same time, in order to make the above and other purposes, technical features and advantages of the utility model more easy to understand, one or more preferred embodiments are listed as follows, and the drawings are described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS
[0029] Figure 1 It is a three-dimensional structure schematic diagram of the chute mechanism for polyethylene particle screening of the utility model.
[0030] Figure 2 It is a bottom view structural schematic diagram of the chute mechanism for polyethylene particle screening of the utility model.
[0031] Figure 3 It is a structure schematic diagram of the colored acrylic slide plate of the utility model.
[0032] Figure 4 It is a back plate structure schematic diagram of the colored acrylic slide plate of the utility model.
[0033] Figure 5 It is a partition plate structure schematic diagram of the colored acrylic slide plate of the utility model.
[0034] MAIN REFERENCE NUMERALS:
[0035] 1-feeding groove, 11-vibrator, 2-colored acrylic slide plate, 20-back plate, 21-partition plate, 211-rectangular ear ring, 22-baffle, 23-fixing plate, 24-slot, 3-plate cleaning air knife, 4-aggregate structure. DETAILED DESCRIPTION
[0036] The specific embodiments of the utility model will be described in detail below with reference to the drawings, but it should be understood that the protection scope of the utility model is not limited by the specific embodiments.
[0037] Unless otherwise explicitly stated, in the entire specification and claims, the term "comprises" or its variants such as "contains" or "includes" and the like will be understood to include the stated element or component, but not exclude other elements or components.
[0038] For the purposes of this disclosure, spatially relative terms, such as "beneath", "below", "lower", "above", "upper", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device is inverted or rotated by 90°, an element described as "below" or "beneath" another element or feature would then be oriented "above" the other element or feature. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90° or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
[0039] In this document, the terms "first", "second", etc. are used to distinguish between two different elements or portions, and are not used to define a particular position or relative relationship. In other words, in some embodiments, the terms "first", "second", etc. can also be interchanged with each other.
[0040] As shown in Figure 1 , 2 The chute mechanism for polyethylene particle screening provided by the utility model is arranged in a polyethylene color sorter (not shown in the figure) and comprises at least a horizontal feeding unit and a colored acrylic chute plate 2. The horizontal feeding unit comprises at least one vibratable feeding groove 1, and single-layered and paved polyethylene particles can be formed on the surface of the feeding groove 1. The feeding groove 1 can be horizontally vibrated by a vibrator 11 arranged at the bottom of the feeding groove 1, and the vibratable feeding groove can create conditions for the uniform paving of polyethylene particles on the chute. The vibration frequency of the vibrator is adjustable and ranges from 0 to 1000 times per minute. The use surface (i.e. the upper surface) of the colored acrylic chute plate 2 is a single-sided frosted surface, the chute plate is light-transmitting, and the upper end of the chute plate is smoothly and transitionally connected with the feeding groove 1. The single-layered and paved polyethylene particles obtained by the feeding groove 1 roll down along the chute plate, and the inferior particles such as colored particles and black point particles can be recognized by photoelectric detection during the rolling process. In order to control the particles from being laterally displaced greatly during rolling, the chute plate is divided into channels by a partition plate 21 arranged along the rolling direction of the particles, and the partition plates 21 are uniformly and spacedly arranged.
[0041] This invention utilizes a vibratory feeding trough in a horizontal feeding unit to obtain a single layer of flat polyethylene granules, creating conditions for the uniformly spread granules to roll onto the conveyor plate. The single-sided frosted design of the colored acrylic conveyor plate increases the friction of the surface, ensuring the granules remain in a rolling state during descent, facilitating the capture of images from different sides of the granules by the industrial camera during photoelectric detection. The overall good light transmittance of the conveyor plate minimizes image shadows during photoelectric detection, further improving the granule recognition efficiency. The partition plate on the conveyor plate ensures more uniform granule rolling and prevents significant lateral displacement.
[0042] Furthermore, the colored acrylic slide 2 of this invention is blue (preferably dark blue), providing a background color for photoelectric detection during particle descent. The tilt angle of the slide is preferably set to approximately 30°; the slide thickness is preferably 3mm; the slide dimensions are preferably 1200mm*630mm; and the spacing between adjacent partitions is preferably 50mm. Experiments have shown that this configuration creates better conditions for identifying inferior particles during photoelectric detection.
[0043] Further as Figures 1 to 5 As shown, the colored acrylic slide 2 and the partition plate 21 can be fixed by the back plate 20. Specifically, the colored acrylic slide 2 has at least two rows of slots 24 on its surface (see reference). Figure 3 (Two rows of slots are shown in the figure), and correspondingly, one end of the partition plate 21 is provided with a rectangular earring 211 that matches the position of the slot 24 (see reference). Figure 5 (The quantity is two); after the rectangular earrings 211 of each partition plate 21 are inserted into the slot 24, they are passed through the horizontally extending fixing plate 23 into the corresponding row of rectangular earrings 211 and fixed to the back plate 20. Further as... Figure 1 , 2 As shown, baffles 22 are provided on both sides of the colored acrylic slide 2. The length of the baffles 22 is adapted to the length of the colored acrylic slide 2. The area between the two baffles 22 is the restricted area for the rolling of particles in this invention. The fixing method of the baffles 22 is the same as that of the partition plate 21, and will not be described again here.
[0044] Further as Figure 1 As shown, the lower end of the partition plate 21 is aligned with the lower end of the colored acrylic slide 2; the upper end of the partition plate 21 is spaced apart from the upper end of the colored acrylic slide, and the upper end of the partition plate 21 preferably adopts a tapered structure (not shown in the figure), which can be used to ensure that the particles from the feeding trough fall smoothly and will not jump violently due to collision, which can effectively reduce the difficulty of subsequent photoelectric detection identification and sorting of inferior particles.
[0045] Further as Figure 1As shown, preferably but not limitedly, the chute mechanism of the utility model can also include a cleaning plate air knife 3. The cleaning plate air knife 3 is arranged at the corresponding position of the upper end of the colored acrylic slide plate 2, and is preferably fixed to the upper end of the back plate 20. The air port size of the cleaning plate air knife 3 is matched with the use width of the slide plate, and is arranged at a certain angle with the slide plate plane. The cleaning plate air knife 3 can be supplied with air by an external air source, can perform timed blowing on the colored acrylic slide plate 2, prevents the influence of dust and other factors on photoelectric detection and identification during production, improves the identification accuracy of the color sorter, and reduces the false detection rate.
[0046] Further as Figure 1 Figure 1 、 2 shown, the left and right sides of the lower end of the back plate 20 are provided with a material collecting structure 4, which is a special-shaped structure, is aligned with the side edge of the colored acrylic slide plate 2 and is fixed on the back plate 20, and can be used for collecting particles falling from the non-channel, preventing the particles from falling into the color sorter.
[0047] The chute mechanism for polyethylene particle screening of the utility model is arranged in the color sorter, and is a mechanical structure part matched with photoelectric detection and identification of inferior particles. The polyethylene particles roll down and slide along the chute formed by the colored acrylic slide plate and the partition plate, the falling track of the high-density polyethylene particles is limited by the chute during the rolling process, the image of the particles in the chute is sent into the computer for image processing and analysis (real-time analysis and processing can be performed by using an artificial intelligence model or software) by high-speed shooting of the industrial area camera relying on the CCD sensor, the inferior particles are identified, and the number, position and / or particle screening of the inferior particles are finally determined. In order to ensure the definition of the image and avoid shadows, the light supplementing treatment can also be performed by the LED light plate. The foregoing industrial area camera and LED light plate and other facilities form a photoelectric system in the color sorter.
[0048] The foregoing description of specific exemplary embodiments of the utility model is for the purpose of explanation and illustration. These descriptions are not intended to limit the utility model to the precise forms disclosed, and obviously, many changes and variations are possible in light of the above teachings. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the utility model and various different selections and changes. Any simple modification, equivalent change and modification made to the foregoing exemplary embodiments shall fall within the protection scope of the utility model.
Claims
1. A chute mechanism for screening of polyethylene particles, characterized by, The device is arranged in a polyethylene color sorter, comprising: a horizontal feeding unit including a vibratable feeding groove in which polyethylene particles are arranged in a single layer; a colored acrylic chute with a single frosted surface and a transparent chute, the upper end of the chute being smoothly connected to the feeding groove, the chute being divided by a partition plate arranged along the direction of particle rolling, the partition plate being arranged at equal intervals.
2. The chute mechanism for polyethylene particle screening according to claim 1, wherein, The device further comprises: a cleaning air knife arranged at a corresponding position on the upper end of the colored acrylic chute, the air inlet of the cleaning air knife being adapted to the width of the chute and being arranged at an angle to the plane of the chute; the cleaning air knife being supplied with air from an external air source.
3. The chute mechanism for polyethylene particle screening according to claim 2, wherein, The colored acrylic chute and the partition plate are fixed by a back plate.
4. The chute mechanism for polyethylene particle screening according to claim 3, wherein, The chute surface of the colored acrylic chute is provided with at least two rows of slots, and the partition plate is provided with a rectangular ear ring at one end which matches the position of the slot; after the rectangular ear ring of each partition plate is inserted into the slot, a horizontally extending fixing plate is inserted into the rectangular ear ring of the corresponding row and fixed to the back plate.
5. The chute mechanism for polyethylene particle screening according to claim 4, wherein, The colored acrylic chute is provided with a baffle on the left and right sides, the length of the baffle being adapted to the length of the colored acrylic chute, and the area between the two baffles being a limiting area for particle rolling.
6. The chute mechanism for polyethylene particle screening of claim 1, wherein, The lower end of the partition plate is aligned with the lower end of the colored acrylic chute; the upper end of the partition plate is spaced apart from the upper end of the colored acrylic chute, and the upper end of the partition plate is provided with a tapered structure to ensure smooth falling of the particles from the feeding groove.
7. The chute mechanism for polyethylene particle screening of claim 3, wherein, The cleaning air knife is fixed to the upper end of the back plate.
8. The chute mechanism for polyethylene particle screening of claim 3, wherein, The back plate is provided with a material collecting structure on the left and right sides of the lower end, the material collecting structure being aligned with the side edge of the colored acrylic chute and being fixed to the back plate, for collecting particles falling outside the channel.
9. The chute mechanism for polyethylene particle screening of claim 1, wherein, The color of the colored acrylic chute is blue, providing a background color for photoelectric detection during particle falling.
10. The chute mechanism for polyethylene particle screening of claim 1, wherein, The inclination angle of the colored acrylic chute is set to 30°; the thickness of the chute is set to 3mm, the width of the chute is set to 1200mm*630mm, and the distance between adjacent partition plates is set to 50mm.