PVC stirring machine

Abstract

The invention discloses a PVC stirring machine, and belongs to the technical field of PVC stirring processing, the PVC stirring machine comprises a support frame body, a PVC powder placing hopper is arranged beside the support frame body, a PVC powder suction system is arranged at the top of the support frame body, the PVC powder suction system is connected with the PVC powder placing hopper, a high-temperature stirring system is arranged on the support frame body and located below the PVC powder suction system, and the PVC powder placing hopper is connected with the high-temperature stirring system. The high-temperature stirring system is communicated with the PVC powder suction system; four oil storage tanks are arranged on the supporting frame body, an oil suction system is arranged on the supporting frame body, the oil suction system is communicated with the four oil storage tanks, and the oil suction system is communicated with a high-temperature stirring system; a high-temperature stirring system is arranged on the side of the supporting frame body, a low-temperature stirring system is further arranged on the side of the supporting frame body, the low-temperature stirring system is communicated with the high-temperature stirring system, a waste recycling system is arranged on the side of the supporting frame body, and an operation main table is further arranged on the side of the supporting frame body. The PVC material stirring device can achieve a better PVC material stirring effect.

Description

Technical Field

[0001] The invention belongs to the technical field of PVC mixing processing, and in particular relates to a PVC mixer. Background Art

[0002] PVC (polyvinyl chloride) is one of the world's largest plastic products. It is cheap and widely used. It can be used for doors, windows, pipes, and plates in the construction industry, interior decoration and parts in the automotive industry, and some products in the healthcare industry. In these industries, PVC needs to be mixed with various additives and auxiliaries to obtain PVC compounds with specific properties and quality, which creates a demand for PVC mixers.

[0003] PVC resin is a white or light yellow powder. It cannot be used alone and must be modified. Different additives, such as plasticizers, stabilizers, lubricants, colorants, etc., need to be added according to different uses, and they must be evenly mixed to make polyvinyl chloride plastics present different physical and mechanical properties. Therefore, an efficient mixer is needed to ensure the uniform mixing of various ingredients to meet the needs of improving the performance of PVC materials.

[0004] However, in the existing method of stirring PVC, the stirring is not uniform, and the amount of PVC resin and additives used cannot be accurately controlled, resulting in poor performance of the PVC material and failure to meet the subsequent use of the PVC material. Summary of the invention

[0005] The embodiment of the present invention provides a PVC mixer to solve the problems in the prior art.

[0006] The embodiment of the present invention adopts the following technical scheme: a PVC mixer comprises a supporting frame, a PVC powder placing bucket is arranged on the side of the supporting frame, a PVC powder suction system is arranged on the top of the supporting frame, the PVC powder suction system is connected to the PVC powder placing bucket, a high-temperature stirring system is arranged on the supporting frame and below the PVC powder suction system, the high-temperature stirring system and the PVC powder suction system are connected; four oil storage tanks are arranged on the supporting frame, an oil suction system is arranged on the supporting frame, the oil suction system is connected to the four oil storage tanks, and the oil suction system is connected to the high-temperature stirring system; a low-temperature stirring system is also arranged on the side of the supporting frame, the low-temperature stirring system is connected to the high-temperature stirring system, a waste recycling system is arranged on the side of the supporting frame, the waste recycling system is connected to the low-temperature stirring system, and an operating console is also arranged on the side of the supporting frame.

[0007] Furthermore, the PVC powder suction system includes a mounting frame, a powder suction pump, a powder weighing scale and a discharge pipe. The mounting frame is arranged on the top of the supporting frame, and a storage tank body is provided on the mounting frame. The powder weighing scale is located in the storage tank body, the powder suction pump is located beside the storage tank body and is connected to the storage tank body, and the powder suction pump is connected to the PVC powder placement bucket.

[0008] Furthermore, the discharge pipe is located at the bottom of the storage tank and an electromagnetic valve is provided at the bottom of the discharge pipe.

[0009] Furthermore, the high-temperature stirring system includes a stirring tank, a stirring motor and a stirring blade. The stirring tank is located at the lower side of the support frame, the stirring motor is located below the stirring tank, the stirring blade is rotatably connected in the stirring tank, the stirring blade is connected to the main shaft of the stirring motor, the stirring tank is provided with a discharge port, and the stirring tank is provided with a heating plate.

[0010] Furthermore, the oil suction system includes a connecting frame, an oil pumping main pump, an oil storage tank and an oil storage shell box, the connecting frame is located on the supporting frame, the oil storage tank is located on the connecting frame, a weight scale is provided on the oil storage tank, four oil inlets are provided on the oil storage tank, four oil extraction pumps are provided on the connecting frame, two ends of the oil extraction pump are respectively connected with the oil inlet and the oil storage tank, the oil storage shell box is located below the connecting frame and the oil storage shell box is connected with the oil storage tank, and two ends of the oil pumping main pump are respectively connected with the oil storage shell box and the mixing tank.

[0011] Furthermore, the low-temperature stirring system includes a mounting seat, a stirring drum, a driving motor and a stirring and mixing blade, the stirring drum is located on the top of the mounting seat, the driving motor is located in the mounting seat, the stirring and mixing blade rotates in the stirring drum and is connected to the main shaft of the driving motor, the stirring drum is provided with a partition, the stirring drum is provided with an automatic discharge channel, the discharge port extends into the stirring drum, and the partition is provided with a connected cold water circulation pipe.

[0012] Furthermore, the waste recycling system includes a placement rack, a recycling stirring box is provided on the top of the placement rack, a horizontally arranged rotating stirring rod is provided in the recycling box, a feed inlet is provided on the recycling stirring box, and a rotating motor is provided on the placement rack to drive the rotating stirring rod to rotate.

[0013] Furthermore, a discharging barrel is provided at the bottom of the recycling mixing box, a mixing auger is provided on the discharging barrel, a discharge pipe extending to the mixing barrel is provided on the discharging barrel, a driving motor for driving the mixing auger to rotate is provided on the barrel, and an electromagnetic valve is also provided on the discharge pipe.

[0014] At least one of the above technical solutions adopted in the embodiments of the present invention can achieve the following beneficial effects:

[0015] Firstly, the present invention can fully and evenly mix the PVC powder and the oil together. The even mixing can make the PVC products more stable in terms of physical properties (such as strength, toughness, hardness, etc.) and chemical properties (such as corrosion resistance, stability, etc.), reduce the product quality differences caused by uneven ingredients, and improve the consistency of products.

[0016] Prevent local defects: Sufficient stirring can avoid local aggregation or uneven distribution of materials in the product, thereby reducing possible defects such as weak points, bubbles, cracks, etc. in the product and improving the overall quality and reliability of the product.

[0017] Secondly, the present invention can flexibly adjust stirring parameters (such as stirring speed, time, temperature, etc.) according to different product requirements and formulas to meet the production needs of various PVC products. Whether it is hard PVC products or soft PVC products, whether it needs to add multiple additives or adopt special formulas, the mixer can achieve good stirring effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ;

[0020] Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ;

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the PVC powder suction system of the present invention;

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the high temperature stirring system of the present invention;

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the oil suction system of the present invention;

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the low-temperature stirring system of the present invention;

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the waste recycling system in the present invention;

[0026] Reference numerals

[0027] Support frame 1, oil storage tank 11, PVC powder placement bucket 2, PVC powder suction system 3, mounting frame 31, powder weighing scale 32, discharge pipe 33, storage tank 34, high temperature stirring system 4, stirring tank 41, stirring motor 42, stirring blade 43, discharge port 44, oil suction system 5, connecting frame 51, oil pumping main pump 52, oil storage tank 53, oil storage shell box 54, oil extraction pump 55, oil inlet 56, low temperature stirring system 6, mounting seat 61, stirring drum 62, driving motor 63, stirring and mixing blade 64, interlayer 65, automatic discharge channel 66, waste recycling system 7, placement frame 71, recycling stirring box 72, rotating stirring rod 73, feed port 74, rotating motor 75, discharge barrel 76, mixing auger 77, discharge pipe 78, working motor 79, operation main platform 8. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] The technical solutions provided by various embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] Reference Figures 1 to 7 As shown, an embodiment of the present invention provides a PVC mixer, including a supporting frame 1, a PVC powder placing bucket 2 is provided on the side of the supporting frame 1, a PVC powder suction system 3 is provided on the top of the supporting frame 1, and the PVC powder suction system 3 is connected to the PVC powder placing bucket 2, and a high-temperature stirring system 4 is provided on the supporting frame 1 and located below the PVC powder suction system 3, and the high-temperature stirring system 4 is connected to the PVC powder suction system 3; four oil storage tanks 11 are provided on the supporting frame 1, and an oil suction system 5 is provided on the supporting frame 1, and the oil suction system 5 is connected to the four oil storage tanks 11, and the oil suction system 5 is connected to the high-temperature stirring system 4; a low-temperature stirring system 6 is also provided on the side of the supporting frame 1, and the low-temperature stirring system 6 is connected to the high-temperature stirring system 4, a waste recycling system 7 is provided on the side of the supporting frame 1, and the waste recycling system 7 is connected to the low-temperature stirring system 6, and an operating console 8 is also provided on the side of the supporting frame 1.

[0031] The main operating console 8 can control the mutual automated operation and work of all systems in the mixer, making the processing more intelligent and the numerical control more precise.

[0032] During use, the PVC powder is poured into the PVC powder placement bucket 2, and then the PVC powder is sucked and weighed by the PVC powder suction system 3 and transported to the high-temperature stirring system 4. The oil suction system 5 weighs and extracts the oil in the four oil storage tanks 11 respectively, and then transported to the high-temperature stirring system 4. The high-temperature stirring system 4 heats and stirs the PVC powder with the oil, and after heating and stirring, it is transported to the low-temperature stirring system 6 to stir the PVC material, and discharged after low-temperature stirring. While stirring, the recycled PVC powder can also be transported to the low-temperature stirring system 6 through the waste recycling system 7 to recycle and reuse the discarded PVC material.

[0033] Specifically, the PVC powder suction system 3 includes a mounting frame 31, a powder suction pump, a powder weighing scale 32 and a discharge pipe 33. The mounting frame 31 is arranged on the top of the supporting frame 1. A storage tank 34 is provided on the mounting frame 31. The powder weighing scale 32 is located in the storage tank 34. The powder suction pump is located beside the storage tank 34 and is connected to the storage tank 34. The powder suction pump is connected to the PVC powder placement bucket 2.

[0034] A 360-degree rotating near infrared spectroscopy sensor is installed at the top of the storage tank 34, and the model is OceanInsight's NIRQuest+2.5. The sensor is connected to an edge computing device via a high-speed data line, using an NVIDIA Jetson Xavier NX module.

[0035] A spectral analysis algorithm based on deep learning is adopted, using the PyTorch framework, and the model adopts a 1D-CNN structure. A PVC powder spectrum database is established, which contains the spectral characteristics of PVC powder of different grades and batches. The system scans once every 5 seconds to analyze the composition and properties of the powder in real time. The analysis results are transmitted to the central control system via industrial Ethernet. A small cabinet is added to the mounting frame 31 for installing edge computing equipment. The analysis results are combined with the data of the powder weighing scale 32 to achieve more accurate formula control. The working parameters of the powder suction pump are automatically adjusted according to the analysis results. The powder suction pump is a variable frequency pump.

[0036] 8 piezoelectric vibration sensors are evenly installed on the surface of the discharge pipe 33, and the model is PCB Piezotronics 352C33. 4 electromagnetic vibrators are installed outside the discharge pipe 33, and the model is OLI's MVE 0510 / 15. An adaptive algorithm based on fuzzy control is used, which is written in C++ language and runs on a PLC (such as Siemens S7-1500). 8 small airflow nozzles are installed at the bottom of the storage tank 34 and connected to a variable frequency speed blower. The airflow control algorithm is used to dynamically adjust the airflow intensity and direction of each nozzle according to the powder flow condition. The vibration control system is integrated into the original PLC control network. A visual interface of the powder flow state is added to the operation console 8.

[0037] An ion wind bar is installed at the inlet and outlet of the discharge pipe 33, and the model is EXAIR's model 112024. A Faraday cage is set around the powder weighing scale 32, which is made of galvanized steel wire mesh with a grid spacing of 5mm. An electrostatic strength detection system is used, and four electrostatic field strength sensors are installed on the surface of the discharge pipe 33, and the model is KEYENCE's SK-H050. The ion generator power adjustment algorithm based on PID control is used, and it is written in the structured text (ST) language of the IEC 61131-3 standard. The control module of the static elimination system is integrated into the PLC. An electrostatic buffer chamber is added at the connection between the storage tank 34 and the discharge pipe 33 to reduce sudden static discharge.

[0038] During operation, the PVC powder in the PVC placing bucket is sucked by the powder suction pump. During suction, the weight of the sucked PVC powder can be accurately controlled by the powder weighing scale 32, and then discharged into the storage tank body 34 for temporary storage. Then, the PVC powder is transported to the mixing tank 41 through the discharge pipe 33, so that automatic suction and feeding of the PVC powder can be realized.

[0039] Specifically, the discharge pipe 33 is located at the bottom of the storage tank 34 and a solenoid valve is provided at the bottom of the discharge pipe 33. The solenoid valve can control the on and off of the discharge pipe 33 so that the powder can be better and more accurately transported to the mixing tank 41.

[0040] Specifically, the high-temperature stirring system 4 includes a stirring tank 41, a stirring motor 42 and a stirring blade 43. The stirring tank 41 is located at the lower side of the support frame 1, and the stirring motor 42 is located below the stirring tank 41. The stirring blade 43 is rotatably connected in the stirring tank 41. The stirring blade 43 is connected to the main shaft of the stirring motor 42. A discharge port 44 is provided on the stirring tank 41, and a heating plate is provided in the stirring tank 41.

[0041] While stirring, the PVC powder to be stirred is heated by the heating sheet. During stirring, the stirring motor 42 drives the stirring blade 43 to rotate in the stirring tank 41, so as to mix and stir the PVC powder and the oil. After heating, the oil is extracted into the stirring tank 41 through the oil suction system 5, and the heating and stirring are continued, so that the PVC powder and the oil are mixed more evenly and the reaction between them is more sufficient.

[0042] Twenty PT100 temperature sensors are evenly installed on the inner wall of the mixing tank 41, using a four-wire connection method.

[0043] The heating plate consists of 10 independently controlled heating units, each with a power of 2kW. A temperature field prediction model based on finite element analysis is adopted using COMSOL Multiphysics software. An adaptive temperature control algorithm is adopted using the model predictive control (MPC) method using MATLAB Model Predictive Control Toolbox. The control algorithm runs on a high-performance industrial PC, such as Advantech's UNO-3384G. The temperature control system exchanges data with the PLC system through the OPC UA protocol. An insulation layer is added to the outside of the stirring tank 41 to improve the accuracy of temperature control. The control logic of the stirring motor 42 is modified to dynamically adjust the stirring speed according to the temperature field distribution.

[0044] The stirring blade 43 is composed of 5 blade units with independently adjustable angles. Each blade unit is controlled by a servo motor, and the SGM7J series of Yaskawa is selected. A stress sensor is installed at the root of each blade unit, and the model is HBM's Z6FC3. A blade angle optimization control strategy based on a genetic algorithm is adopted, which is written in Python. The control algorithm runs on a real-time operating system, such as QNX Neutrino RTOS. The blade control system is integrated with the stirring motor 42 control system to achieve coordinated control. A visual interface for the blade angle and stirring effect is added to the operating console 8.

[0045] A spiral tube heat exchanger is installed outside the stirring tank 41, using a stainless steel tube with a diameter of 20 mm and a total length of 50 m. A phase change material energy storage device is selected, using sodium carbonate decahydrate (melting point 32 ° C), which is filled in a 1m 3The heat exchanger is installed between the mixing tank 41 and the insulation layer. The heat management system is connected to the PVC powder suction system 3 and the oil suction system 5 for raw material preheating. A monitoring interface for heat recovery and utilization is added to the main operation console 8.

[0046] Specifically, the oil suction system 5 includes a connecting frame 51, an oil pumping main pump 52, an oil storage tank 53 and an oil storage shell box 54. The connecting frame 51 is located on the supporting frame body 1, the oil storage tank 53 is located on the connecting frame 51, a weight scale is provided on the oil storage tank 53, four oil inlets 56 are provided on the oil storage tank 53, and four oil extraction pumps 55 are provided on the connecting frame 51. The two ends of the oil extraction pump 55 are respectively connected to the oil inlet 56 and the oil storage tank 11, the oil storage shell box 54 is located below the connecting frame 51 and the oil storage shell box 54 is connected to the oil storage tank 53, and the two ends of the oil pumping main pump 52 are respectively connected to the oil storage shell box 54 and the mixing tank 41.

[0047] During operation, the four oil extraction pumps 55 are used to extract the oil in the four oil storage tanks 11 respectively, and then transported to the oil storage tank 53. The weight of the extracted oil is weighed by a weight pump, and then transported to the oil storage tank 53 and to the oil storage shell box 54. The extracted oil is then transported to the mixing tank 41 by the main oil extraction pump 52, so that the oil and the PVC powder are fully mixed. When the PVC powder is mixed, the oil can be automatically extracted and the extracted oil can be precisely controlled.

[0048] Each oil storage tank 11 is equipped with a Coriolis mass flowmeter, the model of which is Promass F300 of Endress+Hauser. An online density meter and a temperature sensor are installed to achieve temperature compensation.

[0049] Adopt intelligent proportioning algorithm and Response Surface Methodology to optimize the formula. Use micro-dosing device, including 4 high-precision metering pumps, with an accuracy of ±0.1%. Establish a formula database, including the optimal formula parameters for different PVC products. The metering equipment is integrated into the existing connection frame 51. Upgrade the main pump 52 to a variable frequency speed pump to achieve more accurate flow control. Add a stirring device in the oil storage tank 53 to ensure that the additives are fully mixed.

[0050] A pretreatment unit is added between the oil suction system 5 and the high-temperature stirring system 4. Pretreatment can be selected as needed. The setting and monitoring interface of the oil pretreatment parameters is added to the operation console 8. The pretreatment unit is a vacuum degassing device, including a 50L vacuum chamber and a rotary vane vacuum pump. It also includes a micro-emulsification device, which uses high-pressure homogenization technology and can reach a pressure of 100MPa; and a plate heat exchanger is installed for precise temperature regulation of the oil, with a control accuracy of ±0.5℃. The oil pretreatment control system is adopted, based on the Siemens ET 200SP distributed I / O system.

[0051] Specifically, the low-temperature stirring system 6 includes a mounting seat 61, a stirring drum 62, a drive motor 63 and a stirring and mixing blade 64, the stirring drum 62 is located at the top of the mounting seat 61, the drive motor 63 is located in the mounting seat 61, the stirring and mixing blade 64 rotates in the stirring drum 62 and is connected to the main shaft of the drive motor 63, the stirring drum 62 is provided with a partition 65, the stirring drum 62 is provided with an automatic discharge channel 66, the discharge port 44 extends into the stirring drum 62, and the partition 65 is provided with a connected cold water circulation pipeline; the cold water circulation pipeline can circulate, discharge and extract the water in the partition 65, so that the water in the partition 65 is always in a cooling state, ensuring the cooling of the PVC powder.

[0052] After the high-temperature PVC powder and the oil are stirred at high temperature, they are respectively conveyed to the mixing drum 62. Then, the driving motor 63 drives the stirring and mixing blades 64 to rotate in the mixing drum 62 to cool down and stir the PVC powder to prevent the PVC powder from agglomerating when it is in a high-temperature state. Then, the mixture of the PVC powder and the oil is discharged outward through the automatic discharge channel 66 for subsequent use.

[0053] Specifically, the waste recycling system 7 includes a placement rack 71, a recycling stirring box 72 is provided on the top of the placement rack 71, a horizontally arranged rotating stirring rod 73 is provided in the recycling stirring box 72, a feed inlet 74 is provided on the recycling stirring box 72, and a rotating motor 75 for driving the rotating stirring rod 73 is provided on the placement rack 71; a discharge barrel 76 is provided at the bottom of the recycling stirring box 72, a mixing auger 77 is provided on the discharge barrel 76, a discharge pipe 78 extending to the stirring barrel 62 is provided on the discharge barrel 76, a working motor 79 for driving the mixing auger 77 to rotate is provided on the placement rack, and an electromagnetic valve is also provided on the discharge pipe 78.

[0054] After the PVC material is processed, the excess waste on the PVC material is crushed and transported to the recovery mixing box 72 through the feed port 74. The rotating motor 75 drives the rotating stirring rod 73 to rotate in the recovery mixing box 72, so as to stir and mix the recovered PVC powder. The working motor 79 drives the mixing auger 77 to rotate in the discharge barrel 76 to transport the recovered PVC waste outward. The discharge pipe 78 is opened by the electromagnetic valve, and then the waste is transported to the mixing barrel 62 through the discharge pipe 78 for recycling and reuse.

[0055] Install a level sensor and a temperature sensor on each oil storage tank 11, and use an oil identification system based on RFID technology to ensure correct addition. Use an oil circulation system, including a low-power agitator and a regular automatic circulation function. Use a machine learning-based oil demand prediction model using an LSTM (Long Short-Term Memory) network. Establish an automated ordering system with suppliers to achieve timely replenishment.

[0056] The intelligent management system is integrated into the existing PLC control network. A visual interface for oil inventory and quality status is added to the operation console 8. The oil storage box 54 is set at the sampling port to facilitate regular quality inspection.

[0057] The mixing drum 62 is divided into 5 temperature control zones, each zone is equipped with 3 PT100 temperature sensors. A multi-circuit refrigeration system is used, including 5 independent refrigeration units, each unit has a cooling capacity of 3kW. A temperature gradient control algorithm based on fuzzy neural network is adopted, using the TensorFlow framework. A programmable cooling medium circulation system is adopted, which can switch to water, ethylene glycol or thermal oil. A thermal imaging camera is installed to monitor the surface temperature distribution of the mixing drum 62 in real time. The temperature control system is integrated into the original mounting base 61. The interlayer 65 is provided in multiple independent cooling chambers. A 3D visualization interface of the temperature gradient is provided on the operating console 8.

[0058] Eight ultrasonic transducers are installed on the wall of the mixing drum 62, and the frequency can be adjusted between 20-40kHz. The mixing blade 64 has a microstructure on the surface to enhance the ultrasonic effect. The ultrasonic parameter adaptive control algorithm of Caiyuan is based on the real-time viscosity change of the PVC material. A sound intensity measurement device is installed to monitor the intensity distribution of the ultrasonic field in real time. An ultrasonic power protection circuit is used to prevent the transducer from overheating.

[0059] The ultrasonic control system is integrated with the control system of the driving motor 63. The material of the mixing drum 62 is selected from special stainless steel with good acoustic performance. An ultrasonic processing unit is provided at the automatic discharge channel 66 to prevent material agglomeration.

[0060] A near infrared spectrometer is installed at the discharge port of the mixing drum 62, and the model is Bruker's MATRIX-F. An online rheological test device is used, including a small capillary rheometer. A color uniformity detection system based on machine vision is used, using an industrial camera and an LED light source. A metal detector is installed to prevent the mixing of metal foreign matter. A multi-sensor data fusion algorithm is used to comprehensively evaluate product quality. The quality monitoring system is installed at the outlet of the automatic discharge channel 66. A closed-loop control strategy is used to automatically adjust the mixing parameters according to the monitoring results. The display and alarm function of real-time quality monitoring data is added to the operating console 8.

[0061] In a preferred embodiment, it also includes a multi-stage vibration screening system, including 3 layers of screens with different mesh sizes, and a spectral analysis device, including a UV-visible spectrometer and an infrared spectrometer. An airflow sorting device is used to separate the waste according to its density and shape. A classification decision algorithm based on deep reinforcement learning is used, using the PyTorch framework. An automatic sampling system is used to regularly verify the classification results.

[0062] The classification system is installed at the feed port of the placement rack 71. The recycling mixing box 72 is provided with multiple feed ports corresponding to different types of waste. The real-time display and statistical function of the waste classification effect are added to the operation console 8. It also includes a microwave treatment device with a frequency of 2.45GHz and an adjustable power range of 0.5-3kW. The plasma surface treatment unit uses low-temperature atmospheric pressure plasma technology. The functional addition device includes 5 trace additive storage tanks and a high-precision metering pump system. Each storage tank has a capacity of 20L and is made of 316L stainless steel. A stirring device is installed inside. The metering pump uses the gamma / X series of Prominent Company, with a flow range of 0.74-32L / h and an accuracy of ±1%. The adaptive modification control system is based on a hybrid architecture of PLC and industrial PC. The PLC uses the Siemens S7-1500 series, and the industrial PC uses the UNO-3285G of Advantech Technology. The online viscosity measuring device uses the L-Vis 510 rotational viscometer from Anton Paar with a measuring range of 1-40,000 mPa·s. The machine learning-based recipe optimization algorithm uses the scikit-learn library and the random forest model to predict the modification effect. The waste modification system is integrated between the recycling mixing box 72 and the discharge barrel 76. A modification parameter setting interface and real-time monitoring display are added to the operating console 8. The control module of the modification system is connected to the main control system via industrial Ethernet to achieve data sharing and collaborative control.

[0063] The online testing device is installed at the outlet of the discharge pipe 78, and sampling is achieved through a three-way valve. A real-time display of quality control data and a historical trend analysis interface are added to the operation console 8. The data interaction interface with the main production line is used to realize the automatic association and adjustment of the recycled material quality data and the main production formula.

[0064] Through the above in-depth innovations, each subsystem of the PVC mixer has been significantly upgraded, achieving a higher level of intelligence, precision and sustainability. These innovations not only improve the quality and performance of PVC products, but also greatly enhance the flexibility and controllability of the production process. At the same time, through the upgrade of the waste recycling system, the resource utilization efficiency has been significantly improved and the environmental impact has been reduced.

[0065] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A PVC mixer, characterized in that: It comprises a support frame (1), and a PVC powder placing bucket (2) is provided on the side of the support frame (1); A PVC powder suction system (3) is provided on the top of the support frame (1), and the PVC powder suction system (3) is connected to the PVC powder placement hopper (2); The support frame (1) is provided with a high-temperature stirring system (4) located below the PVC powder suction system (3), and the high-temperature stirring system (4) is connected to the PVC powder suction system (3); The support frame (1) is provided with four oil storage tanks (11), and the support frame (1) is provided with an oil suction system (5), and the oil suction system (5) is connected to the four oil storage tanks (11); The oil suction system (5) is connected to the high temperature stirring system (4); A low-temperature stirring system (6) is also provided on the side of the support frame (1), and the low-temperature stirring system (6) is connected to the high-temperature stirring system (4); A waste recycling system (7) is provided on the side of the support frame (1), and the waste recycling system (7) is connected to the low-temperature stirring system (6). An operating console (8) is also provided on the side of the support frame (1).

2. A PVC mixer according to claim 1, characterized in that: The PVC powder suction system (3) comprises a mounting frame (31), a powder suction pump, a powder weighing scale (32) and a discharge pipe (33); The mounting frame (31) is arranged on the top of the supporting frame body (1), and a storage tank body (34) is arranged on the mounting frame (31); The powder weighing scale (32) is located in the storage tank (34), the powder suction pump is located beside the storage tank (34) and is connected to the storage tank (34), and the powder suction pump is connected to the PVC powder placement hopper (2).

3. A PVC mixer according to claim 2, characterized in that: The discharge pipe (33) is located at the bottom of the storage tank (34) and an electromagnetic valve is provided at the bottom of the discharge pipe (33).

4. A PVC mixer according to claim 1, characterized in that: The high temperature stirring system (4) comprises a stirring tank (41), a stirring motor (42) and a stirring blade (43); The stirring tank (41) is located at the lower side of the support frame (1), the stirring motor (42) is located below the stirring tank (41), and the stirring blade (43) is rotatably connected in the stirring tank (41); The stirring blade (43) is connected to the main shaft of the stirring motor (42), a discharge port (44) is provided on the stirring tank (41), and a heating plate is provided in the stirring tank (41).

5. A PVC mixer according to claim 1, characterized in that: The oil suction system (5) comprises a connecting frame (51), an oil pumping master pump (52), an oil storage tank (53) and an oil storage shell box (54); The connecting frame (51) is located on the supporting frame body (1), the oil storage tank (53) is located on the connecting frame (51), and a weight scale is provided on the oil storage tank (53); The oil storage tank (53) is provided with four oil inlets (56), the connecting frame (51) is provided with four oil extraction pumps (55), and the two ends of the oil extraction pumps (55) are respectively connected to the oil inlets (56) and the oil storage tank (11); The oil storage box (54) is located below the connecting frame (51) and is connected to the oil storage tank (53). Both ends of the oil pumping master pump (52) are respectively connected to the oil storage box (54) and the stirring tank (41).

6. A PVC mixer according to claim 4, characterized in that: The low-temperature stirring system (6) comprises a mounting base (61), a stirring drum (62), a driving motor (63) and a stirring and mixing blade (64); The mixing drum (62) is located at the top of the mounting seat (61), the driving motor (63) is located in the mounting seat (61), and the mixing blade (64) rotates in the mixing drum (62) and is connected to the main shaft of the driving motor (63); The mixing drum (62) is provided with a partition (65), the mixing drum (62) is provided with an automatic discharge channel (66), the discharge port (44) extends into the mixing drum (62), and a cold water circulation pipeline is provided in the partition (65).

7. A PVC mixer according to claim 6, characterized in that: The waste recycling system (7) comprises a placement rack (71), and a recycling stirring box (72) is provided on the top of the placement rack (71); A horizontally arranged rotating stirring rod (73) is provided in the recycling stirring box (72), a feeding port (74) is provided on the recycling stirring box (72), and a rotating motor (75) for driving the rotating stirring rod (73) to rotate is provided on the placement frame (71).

8. A PVC mixer according to claim 7, characterized in that: A discharge cylinder (76) is provided at the bottom of the recovery mixing box (72), and a mixing auger (77) is provided on the discharge cylinder (76); The discharging cylinder (76) is provided with a discharging pipe (78) extending to the mixing cylinder (62), and the discharging cylinder is provided with a working motor (79) for driving the mixing auger (77) to rotate; The discharge pipe (78) is also provided with an electromagnetic valve.

Images