Intelligent sorting system and method for household garbage classification recoverable waste plastics

Abstract

The invention discloses a household garbage classification recoverable waste plastic intelligent sorting system and method, the system comprises a waste plastic primary sorting subsystem and a waste plastic fine sorting subsystem, and the waste plastic primary sorting subsystem is provided with an oil can cleaning mechanism beside a manual sorting platform of the waste plastic primary sorting subsystem; the oil can cleaning mechanism is used for cleaning inverted oil cans and sending the cleaned oil cans back to the waste plastic primary sorting subsystem, and the waste plastic primary sorting subsystem is further used for judging whether the cleaned oil cans are PET bottles or other valuable plastics and sending the cleaned oil cans into the waste plastic fine sorting subsystem. And the oil can cleaning mechanism is electrically connected with a controller of the waste plastic primary sorting subsystem. The system has the advantages that the oil can cleaning mechanism is additionally arranged beside the manual sorting platform and used for cleaning inverted oil cans, the oil cans with oil attached to the inner walls removed can be visually and accurately recognized by a computer like other valuable plastics and automatically and finely sorted, additional treatment is not needed, and the sorting rate is increased.

Description

Technical Field

[0001] The present invention belongs to the technical field of domestic waste plastic recycling, and in particular relates to a system and method for intelligently sorting domestic waste recyclable waste plastics. Background Art

[0002] Methods for sorting waste plastics include floating and sinking sorting, wind sorting, electrostatic sorting, flotation and manual sorting.

[0003] Near-infrared spectroscopy sorting technology has been gradually applied as early as the middle and late 20th century. With the promotion of the promulgation and implementation of domestic environmental protection laws and regulations, near-infrared spectroscopy sorting has gradually become one of the main technologies for plastic sorting and has been widely used in the field of mixed waste plastic purification. At the same time, with the development of computer vision, computer technology and digital image processing technology have developed rapidly, laying a solid foundation for the application of computer vision in the field of waste plastic bottle sorting and recycling. This technology uses image processing, image feature extraction technology and pattern recognition as technical support. By processing the images of waste plastic bottles, image features are obtained, and image classification and recognition are achieved through image information and classification algorithms. Waste plastic bottle sorting and recycling based on computer vision has the characteristics of fast and intelligent. Computer vision technology can realize large-scale recycling of waste plastic bottles, and replacing manual labor with machines can save a lot of human resources and conform to the development of society.

[0004] However, the current intelligent sorting equipment still has many shortcomings. For example, when dealing with oil cans, the oil attached to the inner wall of the oil can reflects light and interferes with computer vision, leading to misjudgment. In the existing waste plastic sorting systems and methods, the oil cans can only be manually picked out and disposed of separately, which needs to be improved. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a system and method for intelligently sorting recyclable waste plastics of household garbage that can also perform fine sorting of oil cans.

[0006] The technical solution adopted by the present system to solve the above-mentioned problems is: an intelligent sorting system for waste plastics of classified recyclable materials of domestic waste, including a waste plastics primary sorting subsystem and a waste plastics fine sorting subsystem, wherein the waste plastics primary sorting subsystem is used for preliminarily screening out oil cans, metal cans, PET bottles and other valuable plastics; the waste plastics fine sorting subsystem is used for fine sorting other valuable plastics, fine sorting unlabeled PET bottles, and fine sorting labeled PET bottles after removing the labels; the waste plastics primary sorting subsystem is provided with an oil can cleaning mechanism next to its manual sorting platform, the oil can cleaning mechanism is used for cleaning inverted oil cans and sending the cleaned oil cans back to the waste plastics primary sorting subsystem, the waste plastics primary sorting subsystem is also used for determining whether the cleaned oil cans are PET bottles or other valuable plastics and sending them into the waste plastics fine sorting subsystem, and the oil can cleaning mechanism is electrically connected to the controller of the waste plastics primary sorting subsystem.

[0007] Compared with the existing technology, the advantage of this system is that an oil can cleaning mechanism is added next to the manual sorting platform to clean the inverted oil can. The cleaned oil can after removing the oil attached to the inner wall can be accurately identified by computer vision like other valuable plastics. After being determined to be PET bottles or other valuable plastics, it is automatically and finely sorted by the waste plastic fine sorting subsystem without the need for additional processing, thereby improving the sorting rate.

[0008] As an improvement, the oil pot cleaning mechanism includes a mobile base and a driving motor thereof, the mobile base is provided with a plurality of brackets arranged along the moving direction of the mobile base, a rotating motor is fixed on the bracket, a cleaning rod for sleeve-mounting the inverted oil pot is connected to the flip frame of the rotating motor output shaft, the upper end of the cleaning rod is provided with a plurality of circumferentially distributed spray holes, the spray holes are connected to the water pump or the air pump through the cleaning rod shaft hole, the hose and the reversing valve; the rotating motor is used to rotate to the bottom end after the oil pot is cleaned, so that the oil pot is separated from the cleaning rod under its own gravity and falls back into the waste plastic primary sorting subsystem.

[0009] Preferably, the inclination angle of the cleaning rod is 60°; and the rotary motor is a 90° rotary motor.

[0010] Preferably, the tail end of the cleaning rod is provided with a funnel for receiving oil dripping from the oil pot, the funnel is connected to the water tank, the water pump is arranged at the bottom of the water tank, and the upper part of the water tank is provided with an oil overflow hole connected to the waste oil collection bucket, so as to form a water cycle, reduce the waste of water resources, and collect the waste oil for waste oil reuse.

[0011] As an improvement, a pressure sensor is provided between the bracket and the mobile base, and the pressure sensor is electrically connected to the controller. Each pressure sensor is used to transmit the pressure value applied by the bracket above it to the controller, and the controller controls the oil pot cleaning mechanism to automatically operate through the change of each pressure value without the need for manual operation by the sorter.

[0012] The technical solution adopted by the present method to solve the above problems is: a method for intelligently sorting waste plastics from classified recyclable materials of domestic waste, characterized in that it comprises the following steps:

[0013] Pour the recycled waste plastics into the conveyor belt entrance of the household waste classification recyclable waste plastics intelligent sorting system as described above;

[0014] The oil cans screened out on the manual sorting platform are inverted and put on the cleaning rod;

[0015] The spray hole on the cleaning rod is connected to the water pump through the reversing valve, and the oil pot is sprayed for 1 to 2 minutes;

[0016] Switch the reversing valve so that the spray hole on the cleaning rod is connected to the air pump, and blow air to remove the oil stains in the oil pot;

[0017] After the oil can is cleaned, the rotating motor rotates to the bottom end. The cleaned oil can is separated from the cleaning rod under its own gravity and falls back into the waste plastic primary sorting subsystem. After being judged as PET bottles or other valuable plastics by the AI ​​intelligent optical sorting machine, it is transported to the waste plastic fine sorting subsystem for fine sorting.

[0018] Compared with the existing technology, the advantage of this method is that an oil can cleaning mechanism is added next to the manual sorting platform to clean the inverted oil can. After removing the oil attached to the inner wall, the oil can can be accurately identified by computer vision like other valuable plastics. After being determined to be PET bottles or other valuable plastics, it is automatically and finely sorted by the waste plastic fine sorting subsystem without the need for additional processing, thereby improving the sorting rate.

[0019] Preferably, the pressure sensor is used to transmit the detected pressure value applied by the bracket to the controller;

[0020] After receiving the increase in the pressure value transmitted by a certain pressure sensor, the controller sends a command to the reversing valve corresponding to the pressure sensor to switch to the water pump; and sends a command to the driving motor, so that the driving motor drives the mobile base to move forward one bracket position;

[0021] The controller sends a rotation instruction to the 90° rotating motor corresponding to the pressure sensor after the pressure value transmitted by the pressure sensor drops to a certain pressure value and remains there for 2 minutes;

[0022] When the pressure value sent by the pressure sensor is the initial value, the controller sends a reset command to the 90° rotating motor corresponding to the pressure sensor. Through the perception of each pressure sensor, the controller can intelligently dispatch the oil pot cleaning mechanism, automatically start the cleaning of the oil pot, and automatically send the cleaned oil pot back to the waste plastic primary sorting subsystem. After being judged as a PET bottle or other valuable plastics, the waste plastic fine sorting subsystem will perform fine sorting, thereby reducing the labor intensity of the sorters. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention is a general flow chart of the intelligent sorting method for classifying recyclable waste plastics from domestic waste.

[0024] Figure 2 It is a three-dimensional diagram of the oil pot cleaning mechanism of the present invention (the guide assembly and the drive motor are omitted).

[0025] Figure 3 It is a rear perspective view of the oil pot cleaning mechanism of the present invention (the guide assembly and the drive motor are omitted). DETAILED DESCRIPTION

[0026] The following is a description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, including various details of the embodiments of the present invention to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present invention. Similarly, for clarity and conciseness, the description of well-known functions and structures is omitted in the following description.

[0027] The present invention is a system for intelligently sorting waste plastics from classified recyclables of domestic waste. Figure 1 As shown, it includes a waste plastic primary sorting subsystem 101 and a waste plastic fine sorting subsystem 102. The waste plastic primary sorting subsystem 101 is used for preliminary screening. Oil bottles and electronic products are manually screened out on a manual sorting platform, metal cans are sorted out by a combined eddy current separator, and PET bottles and other valuable plastics are sorted out by an AI intelligent optical sorter; the waste plastic fine sorting subsystem 102 finely sorts other valuable plastics by a first optical sorter, finely sorts unlabeled PET bottles by a second optical sorter, and finely sorts labeled PET bottles by a second optical sorter after the labels are removed by a label remover.

[0028] The waste plastic primary sorting subsystem 101 is provided with an oil pot cleaning mechanism beside its manual sorting platform, and the oil pot cleaning mechanism is used to clean the inverted oil pot and send the cleaned oil pot back to the waste plastic primary sorting subsystem 101. The waste plastic primary sorting subsystem 101 is also used to determine whether the cleaned oil pot is a PET bottle or other valuable plastics and send it to the waste plastic fine sorting subsystem 102. The oil pot cleaning mechanism is electrically connected to the controller of the waste plastic primary sorting subsystem 101. If the cleaned oil pot is a PET bottle, the second optical sorter performs fine sorting according to the sorting method of PET bottles, otherwise the first optical sorter performs fine sorting according to the sorting method of other valuable plastics.

[0029] The oil pot cleaning mechanism is as follows Figure 2 and 3 The mobile base 1 and its driving motor (not shown in the figure) and guide assembly (not shown in the figure) are shown. The mobile base 1 is provided with a plurality of brackets 2 arranged along the moving direction of the mobile base 1. The bracket 2 is fixed with a rotating motor 3. The turning frame 4 of the output shaft of the rotating motor 3 is plugged with a cleaning rod 5 for sleeve-mounting an inverted oil pot. The upper end of the cleaning rod 5 is provided with multiple layers of circumferentially distributed spray holes (not shown in the figure). The spray holes are connected to a water pump (not shown in the figure) and an air pump (not shown in the figure) through the shaft hole of the cleaning rod 5, a reversing valve 6 and a hose respectively; the rotating motor 3 is used to rotate to the bottom end after the oil pot is cleaned, so that the oil pot is separated from the cleaning rod 5 under its own gravity and falls back into the waste plastic primary sorting subsystem 101. The driving motor is preferably a stepping motor or a servo motor.

[0030] Preferably, the inclination angle of the cleaning rod 5 is 60°; and the rotary motor 3 is a 90° rotary motor.

[0031] As an improvement, the tail end of the cleaning rod 5 is provided with a funnel 7 for receiving the oil dripping from the oil pot, the funnel 7 is connected to the water tank, the water pump is arranged at the bottom of the water tank, and the upper part of the water tank is provided with an oil overflow hole connected to the oil collection bucket. It is used to collect oil and form a water cycle to reduce the waste of water resources, and collect the oil automatically by separating the specific gravity of the oil and water for subsequent waste oil reuse.

[0032] As an improvement, a pressure sensor 8 is provided between the bracket 2 and the movable base 1, and the pressure sensor 8 is electrically connected to the controller.

[0033] The intelligent sorting method of waste plastics for classified recyclables of domestic garbage comprises the following steps:

[0034] Pour the recycled waste plastics into the conveyor belt entrance of the household waste classification recyclable waste plastics intelligent sorting system as described above;

[0035] The oil cans screened out on the manual sorting platform are inverted and sleeved onto the cleaning rod 5;

[0036] The spray hole on the cleaning rod 5 is connected to the water pump through the reversing valve 6. When the water pump is turned on, the spray hole quickly sprays water droplets to wash the oil pot for 1 to 2 minutes.

[0037] Switch the reversing valve 6 so that the spray hole on the cleaning rod 5 is connected to the air pump, and blow air for 10 to 15 minutes to remove the oil stains in the oil pot;

[0038] After the oil can is cleaned, the rotating motor 3 rotates to the bottom end, and the oil can is separated from the cleaning rod 5 under its own gravity and falls back into the waste plastic primary sorting subsystem 101. After being determined as PET bottles or other valuable plastics by the AI ​​intelligent optical sorting machine, it is transported to the waste plastic fine sorting subsystem 102 for fine sorting.

[0039] Furthermore, the method further comprises the following steps:

[0040] The pressure sensor 8 is used to transmit the detected pressure value applied by the bracket 2 to the controller;

[0041] After receiving the increase in the pressure value transmitted by a certain pressure sensor 8, the controller sends an instruction to the reversing valve 6 corresponding to the pressure sensor 8 to switch to connecting with the water pump;

[0042] The controller sends a rotation instruction to the 90° rotating motor 3 corresponding to the pressure sensor 8 after the pressure value transmitted by the pressure sensor 8 drops to a certain pressure value and remains there for 2 minutes;

[0043] When the pressure value sent by the pressure sensor 8 is an initial value, the controller sends a reset instruction to the 90° rotating motor 3 corresponding to the pressure sensor 8 .

[0044] In addition, after the last pressure sensor 8 transmits the pressure value increase information to the controller, the controller sends a reset instruction to the driving motor, and the driving motor drives the moving base 1 to return to the initial position.

[0045] The other existing sorting processes as well as packaging, storage and supply and marketing will not be repeated here.

[0046] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may occur depending on design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intelligent sorting system for waste plastics of classified recyclable materials of domestic waste, comprising a waste plastics primary sorting subsystem and a waste plastics fine sorting subsystem, wherein the waste plastics primary sorting subsystem is used to preliminarily screen out oil bottles, metal cans, PET bottles and other valuable plastics; the waste plastics fine sorting subsystem is used to finely sort other valuable plastics, finely sort unlabeled PET bottles, and finely sort labeled PET bottles after removing the labels; characterized in that: The waste plastic primary sorting subsystem is provided with an oil pot cleaning mechanism next to its manual sorting platform. The oil pot cleaning mechanism is used to clean the inverted oil pot and send the cleaned oil pot back to the waste plastic primary sorting subsystem. The waste plastic primary sorting subsystem is also used to determine whether the cleaned oil pot is a PET bottle or other valuable plastics and send it to the waste plastic fine sorting subsystem. The oil pot cleaning mechanism is electrically connected to the controller of the waste plastic primary sorting subsystem.

2. According to claim 1, a system for intelligent sorting of recyclable waste plastics from household waste, characterized in that: The oil pot cleaning mechanism includes a mobile base and a driving motor thereof. The mobile base is provided with a plurality of brackets arranged along the moving direction of the mobile base. A rotating motor is fixed on the bracket. A cleaning rod for sleeve-mounting the inverted oil pot is connected to the flip frame of the rotating motor output shaft. A plurality of circumferentially distributed spray holes are provided on the upper end of the cleaning rod. The spray holes are connected to a water pump or an air pump through a cleaning rod shaft hole, a hose and a reversing valve. The rotating motor is used to rotate to the bottom end after the oil pot is cleaned, so that the oil pot is separated from the cleaning rod under its own gravity and falls back into the waste plastic primary sorting subsystem.

3. According to claim 2, a system for intelligent sorting of recyclable waste plastics from household waste is characterized in that: The inclination angle of the cleaning rod is 60°; the rotary motor is a 90° rotary motor.

4. A system for intelligent sorting of recyclable waste plastics from household waste according to claim 2 or 3, characterized in that: The tail end of the cleaning rod is provided with a funnel for receiving oil dripping from the oil pot, the funnel is connected to the water tank, the water pump is arranged at the bottom of the water tank, and the upper part of the water tank is provided with an oil overflow hole connected to the dirty oil collection bucket.

5. The intelligent sorting system for recyclable waste plastics of household waste classification according to claim 2 or 3 is characterized in that: A pressure sensor is provided between the bracket and the movable base, and the pressure sensor is electrically connected to the controller.

6. A method for intelligently sorting recyclable waste plastics from household waste, characterized in that: The steps include: pouring the recycled waste plastics into the conveyor belt entrance of the intelligent sorting system for sorting recyclable waste plastics of household waste as claimed in any one of claims 2 to 5; The oil cans screened out on the manual sorting platform are inverted and put on the cleaning rod; The spray hole on the cleaning rod is connected to the water pump through the reversing valve, and the oil pot is sprayed for 1 to 2 minutes; Switch the reversing valve so that the spray hole on the cleaning rod is connected to the air pump, and blow air to remove the oil stains in the oil pot; After the oil can is cleaned, the rotating motor rotates to the bottom end. The cleaned oil can is separated from the cleaning rod under its own gravity and falls back into the waste plastic primary sorting subsystem. After being judged as PET bottles or other valuable plastics by the AI ​​intelligent optical sorting machine, it is transported to the waste plastic fine sorting subsystem for fine sorting.

7. The intelligent sorting method for recyclable waste plastics from classified domestic waste according to claim 6 is characterized in that: The steps include: The pressure sensor is used to transmit the detected pressure value applied by the bracket to the controller; After receiving the increase in the pressure value transmitted by a certain pressure sensor, the controller sends a command to the reversing valve corresponding to the pressure sensor to switch to the water pump; and sends a command to the driving motor, so that the driving motor drives the mobile base to move forward one bracket position; When the pressure value transmitted by the pressure sensor drops to a certain pressure value and remains at that value for 2 minutes, the controller sends a rotation instruction to the 90° rotating motor corresponding to the pressure sensor; When the pressure value sent by the pressure sensor is an initial value, the controller sends a reset instruction to the 90° rotating motor corresponding to the pressure sensor.

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