Feeding mechanism for screening polyethylene particles

Abstract

The utility model discloses a feeding mechanism for screening polyethylene particles, which is arranged in a polyethylene color sorter, and at least comprises a hopper which is of a trapezoidal structure, is arranged in a vibrating manner and is used for receiving the polyethylene particles to be screened; the buffer plate is arranged in the hopper and located above an outlet of the hopper, the buffer plate is in an arc shape, and the circle center of the buffer plate is arranged in the direction close to the outlet of the hopper; the tiling unit is arranged on the outer side of the outlet of the hopper, the height size of the outlet of the tiling unit is matched with the size of polyethylene particles, and the tiling unit is used for guiding vertical feeding from the hopper into horizontal feeding of single-layer particles. According to the utility model, through the combined arrangement of the vibratable trapezoidal hopper, the buffer plate and the tiling unit, particles in a'single-layer tiling state 'can be formed, so that better photoelectric identification conditions are created for particles rolling down on a downstream chute structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to polyethylene production technical field, especially a kind of feeding mechanism for polyethylene particle screening. BACKGROUND

[0002] High-density polyethylene resin is one of important chemical raw materials, and can be shaped plastic products using injection, extrusion, blow molding and rotational molding method.High-density polyethylene particle production, because of uncontrollable factors such as processing raw material impurities and processing time, temperature and other factors, resulting in the existence of inferior particle phenomenon such as color particle and black dot color particle of the produced particle, which causes negative impact on subsequent product reprocessing.Faced with existing problems, usually use artificial sampling inspection and large plane grain lamp illumination general detection method to remove inferior particle, and the laying process is complex and tedious, and the laying is easy to cause particle lamination, resulting in large material layer quality fluctuation, manual work intensity is high, and the detection quality is directly affected by manual factors, resulting in high missed detection rate of this kind of way.

[0003] Polyethylene sorting color sorter relies on different particles having different gray scale optical performance difference, and uses photoelectric system to identify particles in different gray scale range, so as to realize screening of inferior polyethylene particles containing color or black dot.

[0004] The existing color sorter device usually uses conveying belt, chute and other structures, and the existing chute structure generally has the situation of "particle stacking", which will cause certain influence on photoelectric identification, and the stain of inferior polyethylene particle is very small, which needs to be analyzed and identified at different angles and surfaces during falling process, and often needs to be screened repeatedly for many times, increasing time and labor cost.The particle stacking of chute is generally caused by the upstream feeding mode, and if the upstream feeding cannot form "single-layer paving" particle state and does not control the flow, the "particle stacking" phenomenon of chute is difficult to avoid.

[0005] Therefore, a feeding mechanism for polyethylene particle screening is needed, which can control the state of incoming material at the feeding source, and can effectively avoid the influence of "particle stacking" in the subsequent chute on 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 present 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. CONTENT OF THE UTILITY MODEL

[0007] The utility model discloses a purpose lies in providing a kind of for polyethylene particle screening feed mechanism, by the combination setting of vibratable trapezoidal hopper, buffer plate and flat unit, can form the particle of " single layer flat state " in turn create better photoelectric identification condition for the particle that rolls down on downstream chute structure.

[0008] To achieve the above object, the utility model provides a kind of for polyethylene particle screening feed mechanism, which is arranged in polyethylene color sorter, at least includes: hopper, it is trapezoidal structure and is vibratable setting, for receiving the polyethylene particle to be screened;Buffer plate is arranged in hopper and is located above the outlet of hopper, the buffer plate is circular arc and center is arranged in the direction close to hopper outlet;Flat unit is arranged outside the outlet of hopper, the outlet height size of the flat unit is adapted to the size of polyethylene particle, for the vertical direction feed from hopper to be guided as the horizontal feed of single layer particle.

[0009] Further, in the above technical solution, the hopper is preferably a thin-walled structure, and the outer wall of the hopper is provided with a vibrator, which can be used to prevent the particles at the outlet of the hopper from being blocked.

[0010] Further, in the above technical solution, the bottom of the longer side of the trapezoidal hopper can be provided with a flow limiting plate, which is inclined to adjust the opening size of the hopper outlet. The flow limiting plate can also be provided with a rectangular through slot structure on both sides to adjust the fixed position of the flow limiting plate in the hopper according to the needs of use.

[0011] Further, in the above technical solution, the flat unit can include: a vertical part extending downward from the bottom of the longer side of the trapezoidal hopper; and an inclined guide part provided at the bottom of the vertical part and extending outward, wherein the gap below the inclined guide part serves as the particle outlet of the flat unit.

[0012] Further, in the above technical solution, the bottom of the hopper can be provided with a damping unit for offsetting the mechanical vibration generated when the hopper vibrates, which includes: a first Z-shaped plate having a first fixed end and a first support end; the first support end is fixedly connected to the bottom of the hopper; a second Z-shaped plate having a second fixed end and a second support end; the second fixed end is connected to the first fixed end; and a damping spring is arranged between the first support end and the second support end.

[0013] Further, in the above technical solution, the feed mechanism can also include a horizontal vibration feeding unit, which is connected to the inclined guide part of the flat unit to horizontally transport the single layer feed from the flat unit.

[0014] Further, in the technical scheme, the horizontal vibration feeding unit can specifically include: a conveying chute, which is connected with the inclined guide part of the laying unit and used for receiving and conveying the horizontal feed of the single layer of polyethylene particles; a horizontal vibrator, which is arranged below the conveying chute and used for providing vibration in the horizontal direction for the conveying chute, so as to control the horizontal particle conveying speed of the conveying chute by controlling the vibration frequency and the exciting force of the horizontal vibrator. The horizontal vibration feeding unit can further include: a front corner plate, which is arranged at the end of the conveying chute and connected with the conveying chute through a connecting pin to form a rotating pair structure; and a tensioning plate, which is arranged between the front corner plate and the conveying chute and used for fixing the angle position of the front corner plate by adjusting the fixed position of the tensioning plate.

[0015] Further, in the technical scheme, the size of the conveying chute is preferably 980mm*450mm; the horizontal amplitude of the conveying chute can be about 1.5mm; and the vibration frequency adjustment range is 0-600 times / min.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1) The trapezoidal structure design of the hopper makes the particle falling speed moderate and the passing rate high, and can effectively meet the demand of the subsequent photoelectric identification efficiency; the thin-wall structure of the hopper and the use of the hopper vibrator can effectively prevent the particle blockage at the hopper outlet.

[0018] 2) The setting of the buffer plate in the hopper can effectively prevent the uneven phenomenon of the hopper discharge caused by the impact of the particles.

[0019] 3) The setting of the laying unit can obtain the horizontal feed of the single layer of particles at the bottom of the hopper, and ensure the uniformity of the horizontal conveying of the particles on the subsequent conveying chute.

[0020] 4) The setting of the flow limiting plate can adjust the opening and closing size of the hopper outlet according to the need, so as to control the discharging speed of the particles.

[0021] 5) The setting of the vibration damping unit at the bottom of the hopper can ensure the stability of the whole equipment while the hopper is vibrating.

[0022] 6) The setting of the horizontal vibration feeding unit can ensure that the polyethylene particles are always in the single layer state during the horizontal conveying process, and can create better conditions for the identification of inferior particles in the subsequent photoelectric detection process of the chute.

[0023] The above description is merely a summary of the technical scheme of the present application, in order to enable one skilled in the art to more clearly understand the technical means of the present application 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 present application more easily understood, one or more preferred embodiments are listed below, and are described in detail as follows with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a three-dimensional structure schematic diagram of the feeding mechanism for polyethylene particle screening of the present application.

[0025] Figure 2 is Figure 1 a three-dimensional structure schematic diagram of the middle hopper.

[0026] Figure 3 is Figure 1 an internal section view schematic diagram of the middle hopper.

[0027] Figure 4 is a three-dimensional structure schematic diagram of the damping unit at the bottom of the hopper of the present application.

[0028] Figure 5 is a three-dimensional structure schematic diagram of the paving unit of the present application.

[0029] Figure 6 is a whole structure schematic diagram of the horizontal vibration feeding unit of the present application.

[0030] MAIN REFERENCE NUMERALS EXPLANATION:

[0031] 1-hopper, 10-longer trapezoidal side, 11-supporting plate, 12-hopper vibrator, 13-flow limiting plate, 2-buffering plate, 3-damping unit, 31-first Z-shaped plate, 32-second Z-shaped plate, 33-damping spring, 4-paving unit, 41-vertical part, 42-inclined guiding part, 5-feeding groove, 51-horizontal vibrator, 52-groove front corner plate, 53-connecting pin, 54-zhanging and closing plate. DETAILED DESCRIPTION

[0032] The specific embodiments of the present application will be described in detail below with reference to the drawings, but it should be understood that the protection scope of the present application is not limited by the specific embodiments.

[0033] Unless otherwise explicitly indicated, in the entire specification and claims, the term "comprise" or its variants such as "include" or "comprising" and the like will be understood to include the stated element or component, but not exclude other elements or components.

[0034] In this document, for ease of description, spatial relative terms such as “below,” “under,” “down,” “above,” “above,” “upper,” etc., are used to describe the relationship of one element or feature to another element or feature in the accompanying drawings. It should be understood that spatial relative terms are intended to encompass different orientations of an object in use or operation, in addition to those depicted in the figures. For example, if an object in the figure is flipped, an element described as “below” or “under” another element or feature would be oriented “above” that element or feature. Thus, the exemplary term “below” can encompass both the downward and upward orientations. An object may also have other orientations (rotated 90 degrees or other orientations), and the spatial relative terms used herein should be interpreted accordingly.

[0035] In this document, the terms "first," "second," etc., are used to distinguish two different elements or parts, and are not used to define specific positions or relative relationships. In other words, in some embodiments, the terms "first," "second," etc., can also be used interchangeably.

[0036] like Figures 1 to 6 As shown, this utility model provides a feeding mechanism for screening polyethylene particles. This feeding mechanism is installed inside a polyethylene color sorter (not shown in the figure) and includes at least a hopper 2, a buffer plate 2, and a spreading unit 4. The hopper 1 has a trapezoidal structure and is vibratory, used to receive polyethylene particles to be screened. This utility model, considering the properties of polyethylene particles and the requirements for subsequent photoelectric recognition efficiency, selected a trapezoidal shape as the hopper shape through experimentation. The buffer plate 2 is installed inside the hopper 1 and located above the outlet of the hopper 1. The buffer plate 2 is arc-shaped with its center located near the hopper outlet (i.e., the arc opening faces downwards). The buffer plate buffers the incoming material as it falls, preventing particles from jumping and vibrating violently at the hopper outlet. The buffer plate 2 can be welded inside the hopper, effectively preventing uneven material discharge from the hopper due to particle impact. The spreading unit 4 is located outside the hopper outlet (see reference). Figure 3 The outlet height of the spreading unit 4 is adapted to the size of the polyethylene granules, and is used to guide the vertical feed from the hopper into a horizontal feed of single-layer granules. The spreading unit 4 can flatten the material granules conveyed by the hopper 1, so that the granules are conveyed evenly in the lateral direction.

[0037] This invention utilizes a trapezoidal hopper design to ensure a moderate particle drop speed and high throughput, effectively meeting the requirements for subsequent photoelectric recognition efficiency. The buffer plate effectively prevents uneven particle discharge from the hopper due to impact. The flattening unit allows for horizontal feeding of a single layer of particles at the bottom of the hopper (i.e., feeding through the feeding trough 5 in the horizontal vibrating feeding unit), ensuring uniform lateral particle conveying.

[0038] Further as Figure 3 shown, the hopper 1 is a thin-walled structure, and a vibrator 12 is arranged on the outer wall of the hopper 1 to prevent the particles at the outlet of the hopper from being blocked. A flow-limiting plate 13 is arranged at the bottom of the longer side 10 of the trapezoidal shape of the hopper 1, and the flow-limiting plate 13 is arranged obliquely to adjust the opening size of the outlet of the hopper 1, thereby controlling the discharging speed of the particles. Rectangular slot structures (not shown in the figure) are arranged on both sides of the flow-limiting plate 13 to adjust the fixed position of the flow-limiting plate 13 in the hopper according to the use requirement.

[0039] Further as Figure 3 , 5 shown, the paving unit 4 can specifically include a vertical part 41 and an inclined guide part 42. The vertical part 41 extends downward from the bottom of the longer side 10 of the trapezoidal shape of the hopper (see Figure 3 ). The inclined guide part 42 is arranged at the bottom of the vertical part 41 and extends outward, and the gap below the inclined guide part 42 (i.e. the gap between the bottom of the hopper and the surface of the conveying groove 5 of the horizontal vibrating feeding unit in Figure 3 , the gap height is matched with the particle diameter) serves as the particle outlet of the paving unit 4. Through the above specific structural design of the paving unit, the vertical feeding of the hopper is converted into the horizontal feeding of the conveying groove, and the single-layer state and uniformity of the feeding particles can be effectively ensured.

[0040] Further as Figure 1 , 4 shown, the bottom of the hopper 1 is provided with a damping unit 3, which can be used to offset the mechanical vibration generated when the hopper vibrates, and includes a first Z-shaped plate 31, a second Z-shaped plate 32, and a damping spring 33. The first Z-shaped plate 31 has a first fixed end and a first support end, and the first support end is fixedly connected to the bottom of the hopper (which can be fixed by the hopper bottom support plate 11 shown in Figure 1 ). The second Z-shaped plate 32 has a second fixed end and a second support end; the second fixed end is connected to the first fixed end, and the second support end is fixedly connected to the overall frame structure (not shown in the figure) of the equipment. The damping spring is arranged between the first support end and the second support end. Through the arrangement of the damping unit, the stability of the entire equipment can be ensured while the hopper is vibrating.

[0041] Further as Figure 1 , 6As shown, the feeding mechanism of this utility model also includes a horizontal vibrating feeding unit, which is connected to the inclined guide part 42 of the paving unit 4 and is used to horizontally convey the single-layer feed from the paving unit 4. Specifically, the horizontal vibrating feeding unit includes a conveying trough 5 and a horizontal vibrator 51. The conveying trough 5 is connected to the inclined guide part 42 of the paving unit and is used to receive and convey the horizontal feed of single-layer polyethylene particles. The horizontal vibrator 51 is located below the conveying trough 5 and is used to provide horizontal vibration for the conveying trough. This utility model can control the horizontal particle conveying speed of the conveying trough 5 by controlling the vibration frequency and excitation force of the horizontal vibrator 51. Further, the horizontal vibrating feeding unit may also include a front folding plate 52, which is located at the end of the conveying trough 5 and is connected to the conveying trough 5 by a connecting pin 53 to form a rotating pair structure. A tensioning plate 54 is also provided between the front angle plate 52 and the conveying trough 5. The angle position of the front angle plate 52 can be fixed by adjusting the fixed position of the tensioning plate 54.

[0042] The feeding trough 5 of this invention is the upstream facility of the inclined chute mechanism (not shown in the figure) of the color sorter. The dimensions of the feeding trough 5 are preferably set to 980mm*450mm (matching the width of the chute); the horizontal amplitude of the feeding trough 5 is preferably 1.5mm; the vibration frequency can be adjusted from 0 to 600 times / min. This arrangement ensures that the polyethylene particles remain in a single layer during the horizontal feeding process, creating better preconditions for the identification of inferior particles in the subsequent photoelectric detection process of the chute rolling down.

[0043] The feeding mechanism for screening polyethylene particles in this invention is installed inside the color sorter and combined with the aforementioned chute mechanism to form a mechanical structure supporting photoelectric detection and identification of inferior particles. Through the vibration of the hopper and particle flow control, and by converting vertical feeding into uniform horizontal feeding, better conditions are created for the single-layer, uniform rolling of particles on the chute mechanism. Furthermore, relying on a CCD sensor, an industrial area array camera captures high-speed images of the particles in the chute, which are then sent to a computer for image processing and analysis (real-time analysis can be performed using artificial intelligence models or software) to identify inferior particles and ultimately determine their quantity, location, and / or perform particle screening. To ensure image clarity and avoid shadows, supplementary lighting can be provided using an LED light panel. The aforementioned industrial area array camera and LED light panel constitute the photoelectric system in the color sorter.

[0044] The foregoing description of specific exemplary embodiments of the present application is intended to be illustrative only and is not intended to limit the application to the precise forms described. Many modifications and variations are possible in light of the above teachings without departing from the spirit or essential characteristics of the present application. The exemplary embodiments were chosen and described in order to explain the principles of the present application and its practical application and to allow others skilled in the art to understand the present application for various exemplary embodiments with various modifications as are suited to the particular use contemplated. Any simple modifications, equivalent changes, and modifications based on the above-described exemplary embodiments should fall within the scope of the present application.

Claims

1. A feed mechanism for polyethylene particle screening, characterized by, The application discloses a polyethylene color sorter, which comprises the following parts: a hopper in trapezoidal structure and provided with vibration function, used for receiving polyethylene particles to be screened; a buffer plate provided in the hopper and located above the outlet of the hopper, the buffer plate is in circular arc shape and the center of the circle is provided close to the direction of the outlet of the hopper; a paving unit provided outside the outlet of the hopper, the outlet of the paving unit is sized to be matched with the size of the polyethylene particles, and the paving unit is used for guiding the vertical feeding from the hopper to horizontal feeding of single-layer particles; the paving unit comprises a vertical part extending downward from the bottom of the longer side of the trapezoidal hopper, and an inclined guide part provided at the bottom of the vertical part and extending outward, and the gap below the inclined guide part is used as the particle outlet of the paving unit; a horizontal vibration feeding unit connected with the inclined guide part of the paving unit, used for horizontally conveying the single-layer feeding from the paving unit; the horizontal vibration feeding unit comprises a feeding groove connected with the inclined guide part of the paving unit and used for receiving and conveying the horizontal feeding of single-layer polyethylene particles, a horizontal vibrator provided below the feeding groove and used for providing vibration in the horizontal direction for the feeding groove, a feeding groove front corner plate provided at the end of the feeding groove and connected with the feeding groove through a connecting pin to form a rotating pair structure, and a tensioning plate provided between the feeding groove front corner plate and the feeding groove and used for adjusting the angle position of the feeding groove front corner plate by adjusting the fixed position of the tensioning plate.

2. The feed mechanism for polyethylene particle screening according to claim 1, wherein, The hopper is in thin-wall structure, and a vibrator is arranged on the outer side wall of the hopper and used for preventing the particles at the outlet of the hopper from being blocked.

3. The feeder mechanism for polyethylene particle screening according to claim 1, wherein, The bottom of the longer side of the trapezoidal hopper is provided with a flow limiting plate, and the flow limiting plate is arranged in an inclined manner and used for adjusting the opening and closing size of the outlet of the hopper.

4. The feed mechanism for polyethylene particle screening according to claim 3, wherein, Rectangular through slots are arranged on both sides of the flow limiting plate and used for adjusting the fixed position of the flow limiting plate in the hopper according to the use requirement.

5. The feeder mechanism for polyethylene particle screening according to claim 1, wherein, A vibration reduction unit is arranged at the bottom of the hopper and used for offsetting the mechanical vibration generated when the hopper vibrates, and the vibration reduction unit comprises a first Z-shaped plate with a first fixed end and a first support end, the first support end is fixedly connected with the bottom of the hopper, a second Z-shaped plate with a second fixed end and a second support end, the second fixed end is connected with the first fixed end, and a vibration reduction spring arranged between the first support end and the second support end. The size of the feeding groove is 980mm*450mm, the horizontal amplitude of the feeding groove is 1.5mm, and the vibration frequency adjustment range is 0-600 times / min. ​ ​ 6. The feeder mechanism for polyethylene particle screening according to claim 1, wherein, ​

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