Efficient raw material crushing and blending device for polycarbonate preparation

Abstract

The invention discloses an efficient raw material crushing and blending device for polycarbonate preparation, and relates to the technical field of efficient crushing, the efficient raw material crushing and blending device comprises a first transmission table, a second transmission table rotationally mounted at the upper end of the first transmission table, a mixing barrel rotationally mounted in the second transmission table, and a crusher mounted at the rear end of the mixing barrel; crushed raw materials are fed into the mixing cylinder through the spiral feeder, and the raw materials are prevented from being accumulated in the crusher; through installation of the cooling pipe, heat generated in the raw material mixing process is conveniently taken away, and the stability of the blending process is improved; the analysis module comprehensively analyzes the current, air pressure and flow data, calculates the accumulated total adhesion amount in real time, and triggers a cleaning signal when the adhesion amount reaches the maximum centrifugal force tolerance threshold value of the equipment; the rotating speed is reduced to a safe rotating speed before cleaning, so that the centrifugal force of attachments during sudden stop is less than or equal to the surface tolerance limit of the crushing roller, impact damage of the attachments to the crushing roller, a transmission belt and other parts is avoided, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of polycarbonate crushing and mixing tools, in particular to a high-efficiency crushing and blending device for raw materials used in the preparation of polycarbonate. Background Art

[0002] In modern industrial production, polycarbonate is widely used in many fields such as electronics, automobile manufacturing, and medical devices due to its excellent optical properties, mechanical strength, and thermal stability. In the preparation process of polycarbonate, raw material crushing and blending are key links. The particle size uniformity of raw material crushing and the degree of blending directly affect the final quality and performance of polycarbonate products.

[0003] Currently, common polycarbonate raw material crushing and blending equipment on the market generally suffers from low crushing efficiency and high energy consumption. The traditional crusher's single crushing structure makes it difficult to fully crush the raw materials to a suitable particle size, resulting in uneven subsequent blending and affecting the physical properties of polycarbonate products. During the blending process, most devices use a simple stirring method, which easily leads to local concentration differences in the raw materials during the mixing process, making it impossible to achieve sufficient and uniform mixing. Moreover, during the long crushing and blending process, the heat generated by the friction of the raw materials cannot be dissipated in time, which may cause changes in the raw material properties and even pose safety hazards. Therefore, the above problems need to be solved. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a high-efficiency crushing and blending device for raw materials used in the preparation of polycarbonate.

[0005] In order to achieve the above-mentioned object, the present invention adopts the following technical scheme: a high-efficiency crushing and blending device for raw materials for the preparation of polycarbonate, comprising a first transmission platform, a second transmission platform rotatably mounted at the upper end of the first transmission platform, a mixing drum rotatably mounted inside the second transmission platform, and a crusher mounted at the rear end of the mixing drum, wherein the mixing drum is a double-layer structure, a cooling mechanism is installed in the interlayer of the mixing drum, a first transmission mechanism is installed inside the first transmission platform, a second transmission mechanism is installed inside the second transmission platform, four support rods are fixed to the bottom end of the crusher, a transmission box is installed at the rear end of the crusher, a first motor is installed inside the transmission box, a discharge port is obliquely opened at the top of the crusher, and a crushing roller is rotatably installed inside the crusher; The control box of the crushing and blending device is equipped with an intelligent control component, which includes an analysis module; The analysis module analyzes the particle size data transmitted from the acquisition module to determine whether the real-time crushing particle size needs to be adjusted. If adjustment is required, a speed control signal is generated, and the speed control signal and the adjustment amount data are transmitted to the execution module. The analysis module analyzes the current data of the first motor transmitted from the acquisition module, the air pressure data at the bottom of the crusher, and the raw material delivery flow data entering the mixing barrel to determine the amount of attachments on the crushing roller. When the amount of attachments reaches a threshold, a cleaning signal is generated and the cleaning signal is transmitted to the execution module.

[0006] Preferably, a crushing wall is installed at the lower end of the crushing roller, a plurality of filter holes are opened through the bottom of the crushing wall, and a conical discharge port is installed at the bottom end of the crusher, a screw feeder is installed at the lower end of the conical discharge port, the conical discharge port is communicated with the interior of the screw feeder, and a second motor for driving the screw feeder is installed at the rear end of the screw feeder, a mounting plate is fixed to the support rod, and the second motor and the screw feeder are both installed on the top surface of the mounting plate.

[0007] Preferably, first transmission wheels are fixedly connected to the first motor output shaft and the crushing roller rotating shaft, and first transmission belts are sleeved on the outer sides of the two first transmission wheels.

[0008] Preferably, the first transmission mechanism includes a cylinder installed on the inner side of the first transmission platform and two external gear discs fixedly connected to the bottom surface of the second transmission platform. A slide is installed at the output end of the cylinder. The slide is slidably installed inside the first transmission platform, and two sets of racks are fixedly connected to the top surface of the slide. The two sets of racks are respectively engaged with the corresponding external gear discs for transmission.

[0009] Preferably, ear plates are fixedly connected to both sides of the top surface of the first transmission platform, and rotation grooves are opened on the two ear plates; guide plates are fixedly connected to both sides of the bottom surface of the second transmission platform, and the two guide plates are respectively located in the corresponding rotation grooves.

[0010] Preferably, the second transmission mechanism includes a third motor installed inside the second transmission platform and two sets of drive disks rotatably installed inside the second transmission platform, the two sets of drive disks are composed of two turntables, and the second transmission wheel is fixedly connected to the output shaft of the third motor and the rotating shaft of the drive disk on one side, the second transmission belt is sleeved on the outer side of the two second transmission wheels, and limit blocks are rotatably installed on the top ends of both sides of the second transmission platform.

[0011] Preferably, a driving ring and two limiting rings are fixedly connected to the outside of the mixing barrel. The driving ring is located on the inner sides of the two turntables and abuts against the inner sides of the two turntables. The limiting block is slidably installed on the inner sides of the two limiting rings, and a plurality of conical blocks are fixedly connected at equal distances to the inner wall of the mixing barrel.

[0012] Preferably, the cooling mechanism includes an H-type rotary joint installed at the rear end of the mixing drum feed port and a cooling pipe installed in the mixing drum interlayer, the H-type rotary joint is equipped with a water inlet and a drain port, the water inlet and the drain port are respectively connected to the two ends of the cooling pipe, and the front end of the H-type rotary joint is connected to the mixing drum feed port through a flange, and the rear end of the H-type rotary joint is equipped with a reinforced hose through a flange, and the other end of the reinforced hose is connected to the screw feeder.

[0013] Preferably, the steps of particle size analysis performed by the analysis module are as follows: S1: Sort the granularity data detected in real time within the set time period according to the collection time, and sort the granularity data collected at the same time. The average of the particle size data and standard deviation Calculation of the mean value and standard deviation Detection of particle size data fluctuation range The setting of the detection granularity data that is not within the fluctuation range is marked as an outlier, and the number of outliers is Perform statistics, if , then the detection moment is marked as an abnormal moment, is the preset proportional coefficient; S2: After the abnormality occurs, the particle size sensor performs a self-check operation. If the self-check is found to be correct, it is determined that the detected particle size data is abnormal; otherwise, it is determined that the particle size sensor is abnormal, and a maintenance signal is generated and transmitted to the execution module; S3: Particle size after crushing With crushing roller 5 speed Inversely proportional to the gap , Raw material hardness Proportional to granularity , is a correction factor related to the equipment structure; after the particle size data is determined to be abnormal, the abnormal particle size data With normal granularity data For comparison, if , a speed control signal is generated, and the speed adjustment amount is calculated based on the difference between the abnormal granularity data and the normal granularity data, and the speed control signal and adjustment amount data are passed to the execution module.

[0014] Preferably, the analysis module performs the following steps to analyze the amount of deposits: K1: The average of the current data and flow data at the non-abnormal time is used as the preset current threshold and preset traffic thresholds , according to the detected air pressure data, the fluctuation range of the air pressure data The detection data of the corresponding item is compared with the threshold value or fluctuation range of the corresponding item, if the detection data of the corresponding item exceeds the threshold value or is not within the fluctuation range of the corresponding item, it is determined that the raw material is adhered, the adhesion count is added by one; then the adhesion count is compared with the number of the corresponding item, if the adhesion count exceeds half of the number of the corresponding item, it is determined that the adhesion occurs, and the time point is marked as the adhesion time point; K2: adhesion amount per unit time , K1: proportional coefficient related to the characteristics of the raw material, , , The time interval between the adhesion time point and the current time is multiplied by the adhesion amount per unit time to obtain the adhesion amount of the raw material on the crushing roller; K3: safe rotating speed , N: normal working rotating speed; the maximum centrifugal force that the surface of the crushing roller can withstand is According to the calculation of , When the adhesion amount reaches , a cleaning signal is generated, and the cleaning signal is transmitted to the execution module, R: radius data of the crushing roller, angular velocity , M: mass of the adhesion.

[0015] Compared with the prior art, the beneficial effects of the present application are: 1. Through the cooperation of the crushing wall, the crushing roller, the second motor and the spiral feeder, the crushed raw material is blown into the mixing cylinder through the ribbed hose by the airflow, thereby avoiding the accumulation of raw materials in the crusher, improving the efficiency of raw material conveying, and realizing the continuous function of crushing and conveying; through the cooperation of the first transmission mechanism, the second transmission mechanism and the conical block, the mixing cylinder is conveniently rotated on the X and Y axes, thereby improving the mixing efficiency; through the installation of the cooling pipe, the heat generated during the mixing of the raw materials is conveniently removed, thereby avoiding the property change of the raw materials due to high temperature, and improving the stability of the blending process; thereby solving the problems of easy accumulation of raw materials in the crushing roller, poor mixing effect and property change due to heat generated during processing of the existing device; 2. The analysis module calculates the mean and standard deviation of particle size data and determines outliers, accurately identifying abnormal fluctuations in crushed particle size. Combined with the quantitative relationship between particle size and rotational speed, it automatically generates a speed regulation signal when the particle size is abnormal, and dynamically adjusts the crushing roller speed through the execution module. When the particle size is too large, the speed is increased to enhance the crushing strength; when the particle size is too small, the speed is reduced to avoid excessive crushing. This ensures that the particle size of the raw material after crushing is always stable within the preset range, providing a uniform raw material base for subsequent blending and improving the consistency of the physical properties of polycarbonate products. 3. Through comprehensive analysis of current, air pressure and flow data by the analysis module, the amount of attachment per unit time is calculated in real time and the total amount of attachment is accumulated. When the amount of attachment reaches the maximum centrifugal force tolerance threshold of the equipment, the cleaning signal is triggered. Before cleaning, the speed is reduced to a safe speed to ensure that the centrifugal force of the attachment is less than or equal to the tolerance limit of the crushing roller surface during emergency stop, thereby avoiding impact damage to the crushing roller, transmission belt and other components by the attachment, and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. 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: Figure 1 This is a schematic diagram of the overall appearance of the device proposed by the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the crusher proposed by the present invention; Figure 3 This is a schematic structural diagram of the second transmission mechanism proposed in the present invention; Figure 4 This is a schematic diagram of the cross-sectional structure of the mixing drum proposed by the present invention; Figure 5 This is a schematic diagram of the cooling mechanism structure proposed by the present invention; Figure 6 This is a flow chart of the system proposed in the present invention.

[0017] Serial numbers in the figure: 1. First transmission platform; 2. Second transmission platform; 3. Mixing drum; 4. Crusher; 5. Crushing roller; 6. Crushing wall; 7. First motor; 8. First transmission belt; 9. Screw feeder; 10. Second motor; 11. Mounting plate; 12. Cylinder; 13. Guide plate; 14. Slide plate; 15. Third motor; 16. Turntable; 17. Second transmission belt; 18. Limit block; 19. Drive ring; 20. Limit ring; 21. H-type rotary joint; 22. Reinforced hose; 23. Conical block; 24. External gear disc; 25. Cooling pipe. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Example 1: See Figures 1 to 6 The present invention relates to a high-efficiency crushing and blending device for raw materials used in the preparation of polycarbonate, comprising a first transmission platform 1, a second transmission platform 2 rotatably mounted on the upper end of the first transmission platform 1, a mixing drum 3 rotatably mounted inside the second transmission platform 2, and a crusher 4 mounted at the rear end of the mixing drum 3. The first transmission platform 1 and the second transmission platform 2 facilitate driving the mixing drum 3 to rotate on the X-axis and the Y-axis. The mixing drum 3 is a double-layer structure, a cooling mechanism is installed in the interlayer of the mixing drum 3, a first transmission mechanism is installed inside the first transmission platform 1, a second transmission mechanism is installed inside the second transmission platform 2, and the crusher 4 is installed at the rear end of the mixing drum 3. Four supporting rods are fixed to the bottom end, and a transmission box is installed at the rear end of the crusher 4. A first motor 7 is installed inside the transmission box, which is convenient for cooperating with the first transmission wheel and the first transmission belt 8 to drive the crushing roller 5 to rotate; and a discharge port is opened obliquely at the top of the crusher 4, and a crushing roller 5 is installed inside the crusher 4, which is convenient for cooperating with the crushing wall 6 to crush the raw material; a crushing wall 6 is installed at the lower end of the crushing roller 5, and a plurality of filter holes are opened at the bottom of the crusher 4, and a conical discharge port is installed at the bottom of the crusher 4, and a screw feeder 9 is installed at the lower end of the conical discharge port. The screw feeder 9 facilitates the continuous delivery of the crushed raw materials to the mixing drum 3; the conical discharge port is communicated with the interior of the screw feeder 9, and a second motor 10 for driving the screw feeder 9 is installed at the rear end of the screw feeder 9, which facilitates the screw feeder 9 to rotate through the second motor 10; a mounting plate 11 is fixed to the support rod, and the second motor 10 and the screw feeder 9 are conveniently installed through the mounting plate 11; the second motor 10 and the screw feeder 9 are both installed on the top surface of the mounting plate 11, and the first transmission wheels are fixed to the output shaft of the first motor 7 and the rotating shaft of the crushing roller 5. The two first transmission wheels The first transmission belt 8 is sleeved on the outside, and the first transmission mechanism includes a cylinder 12 installed on the inner side of the first transmission platform 1 and two outer gear discs 24 fixedly connected to the bottom surface of the second transmission platform 2. The cylinder 12 is used to drive the slide 14 to move back and forth; the outer gear discs 24 are used to drive the second transmission platform 2 to rotate; a slide 14 is installed on the output end of the cylinder 12, and a rack is installed through the slide 14 to cooperate with the outer gear discs 24 for rotation; the slide 14 is slidably installed inside the first transmission platform 1, and two sets of racks are fixedly connected to the top surface of the slide 14, and the two sets of racks are respectively engaged with the corresponding outer gear discs 24 for transmission.

[0020] In the present invention, ear plates are fixed on both sides of the top surface of the first transmission platform 1, and rotation grooves are opened on both ear plates. Guide plates 13 are fixed on both sides of the bottom surface of the second transmission platform 2, and the guide plates 13 are used to assist the rotation of the outer gear plate 24; the two guide plates 13 are respectively located in the corresponding rotation grooves, and the second transmission mechanism includes a third motor 15 installed inside the second transmission platform 2 and two sets of drive discs rotatably installed inside the second transmission platform 2, and the third motor 15 is used to drive one set of drive discs to rotate; both sets of drive discs are composed of two rotating discs 16, one set of drive discs The disc is convenient for driving the mixing drum 3 to rotate, and the other set of driving discs is convenient for assisting the mixing drum 3 to rotate; and the second transmission wheel is fixedly connected to the output shaft of the third motor 15 and the rotating shaft of the driving disc on one side, and the second transmission belt 17 is sleeved on the outer side of the two second transmission wheels, and the third motor 15 drives one set of driving discs to rotate through the second transmission belt 17; and the top of both sides of the second transmission platform 2 are rotatably installed with limit blocks 18, and the limit blocks 18 facilitate the mixing drum 3 to rotate simultaneously on the X and Y axes; the outside of the mixing drum 3 is fixedly connected to a driving ring 19 and two limit rings 20, through which The driving ring 19 facilitates the cooperation with the driving disk to drive the mixing drum 3 to rotate; the limiting ring 20 facilitates the installation of the limiting block 18; the driving ring 19 is located on the inner side of the two turntables 16, and the driving disk and the driving ring 19 are engaged with each other through the gear block transmission, and abut against the inner side of the two turntables 16, and the limiting block 18 is slidably installed on the inner side of the two limiting rings 20, and a plurality of conical blocks 23 are fixedly connected to the inner wall of the mixing drum 3 at equal distances. The conical blocks 23 facilitate the acceleration of mixing efficiency and the improvement of mixing effect; the cooling mechanism includes an H-shaped rotary joint 2 installed at the rear end of the feed port of the mixing drum 3 1 and a cooling pipe 25 installed in the interlayer of the mixing drum 3, which is convenient for cooperating with the cooling pipe 25 to cool the mixing drum 3 through the H-type rotary joint 21; a water inlet and a drain port are installed on the H-type rotary joint 21, and the water inlet and the drain port are respectively connected to the two ends of the cooling pipe 25, and the front end of the H-type rotary joint 21 is connected to the feed port of the mixing drum 3 through a flange, and a reinforced hose 22 is installed at the rear end of the H-type rotary joint 21 through a flange, which facilitates feeding when the mixing drum 3 rotates; the other end of the reinforced hose 22 is connected to the screw feeder 9.

[0021] Example 2: See Figure 6 , an intelligent control component is provided inside the control box of the crushing and blending device, and the intelligent control component includes an acquisition module, an analysis module and an execution module; The acquisition module collects the particle size data, the rotation speed data of the crushing roller 5, the current data supplied to the rotation of the crushing roller 5 and the air pressure data at the bottom of the crusher 4, and transmits the collected data to the analysis module; The analysis module analyzes the particle size data transmitted by the acquisition module to determine whether the real-time crushing particle size needs to be adjusted. If adjustment is required, it generates a speed control signal and transmits the speed control signal and the adjustment amount data to the execution module. It also analyzes the current, air pressure, and flow data transmitted by the acquisition module (current data of the first motor 7 driving the crushing roller 5, air pressure data at the bottom of the crusher 4, and flow data of the raw material entering the mixing drum 3 through the reinforced hose 22) to determine the amount of attachment on the crushing roller 5. When the attachment amount reaches a threshold, it generates a cleaning signal and transmits the cleaning signal to the execution module. A particle size sensor is installed on the inner side of the crushing wall 6 to detect the particle size data of the falling particles in real time. The particle size data detected in real time within a set time period are sorted according to the collection time, and the particles collected at the same time are sorted. The average of the particle size data and standard deviation Calculation of the mean value and standard deviation Detection of particle size data fluctuation range The setting of the detection granularity data that is not within the fluctuation range is marked as an outlier, and the number of outliers is Perform statistics, if , then the detection moment is marked as an abnormal moment, is the preset proportional coefficient; When an abnormality occurs, the particle size sensor performs a self-check operation (the photodiode inside the sensor starts to monitor the output power of the light source, the system records the current power value, and compares it with the factory calibration value or the historical normal value. If the power drift exceeds the set threshold (such as ±2%), the system records the abnormality and triggers an alarm). If the self-check is correct, it is determined that the detected particle size data is abnormal; otherwise, it is determined that the particle size sensor is abnormal, and a maintenance signal is generated and transmitted to the execution module; The core of the particle size sensor's self-test is monitoring light source power drift, with a threshold set at ±2%. This standard is based on the sensor's operating principle and detection accuracy requirements. The particle size sensor illuminates particles with laser light and uses diffraction patterns to analyze particle size. The stability of the light source power directly affects the intensity and signal-to-noise ratio of the diffraction signal. If the power drift exceeds ±2%, it may lead to systematic deviations in the particle size detection value (for example, when the power is low, the diffraction signal of small particles may be misclassified as large particles). During self-test, the sensor's internal photodiode monitors the light source output power in real time and compares it with the factory calibration value or the average power of the last three normal detections. For example, if the factory power is 100mW and the current power drops to 97mW (-3% drift), the sensor is considered abnormal. This threshold takes into account the actual performance of the device (the light source has slight natural attenuation) and detection reliability. It not only avoids misjudgments due to minor fluctuations (for example, a drift of ±1% is acceptable), but also promptly detects faults that affect detection accuracy, ensuring the validity of the particle size data and providing reliable input for the analysis module. After receiving the maintenance signal, the execution module sends the particle size sensor maintenance signal to the maintenance personnel through the wireless communication module set inside the intelligent control component, and marks the number of the particle size sensor to be repaired, so that the maintenance personnel can accurately locate the abnormal position; Particle size after crushing With crushing roller 5 speed Inversely proportional to the gap , Raw material hardness Proportional to granularity , is a correction factor related to the equipment structure; after the particle size data is determined to be abnormal, the abnormal particle size data With normal granularity data For comparison, if , then a speed control signal is generated, and the speed adjustment amount is calculated based on the difference between the abnormal granularity data and the normal granularity data, and the speed control signal and the adjustment amount data are passed to the execution module; After receiving the speed control signal, the execution module , then adjust the speed increase according to the adjustment amount; if , the speed is decelerated according to the adjustment amount.

[0022] Monitor the current changes of the crushing roller 5, monitor the air pressure changes at the bottom of the crusher 4, monitor the flow rate of raw materials entering the mixing drum 3, and analyze the current data, air pressure data and flow data monitored at non-abnormal times; use the average values ​​of the current data and flow data at non-abnormal times as the preset current thresholds and preset traffic thresholds , according to the detected air pressure data, the fluctuation range of the air pressure data The setting of the corresponding item is then compared with the threshold or fluctuation range of the corresponding item. If the detection data of the corresponding item exceeds the threshold or is not within the fluctuation range of the corresponding item, it is determined that the raw material is sticky and adhered, and the adhesion count is increased by one; then the adhesion count is compared with the number of items of the corresponding item. If the adhesion count exceeds half of the number of items of the corresponding item, it is determined that adhesion occurs, and the moment is marked as the adhesion moment; the amount of adhesion per unit time is , is the proportionality coefficient related to the raw material characteristics, 、 、 They are the current, air pressure and flow data detected in real time; Formula for attachment amount per unit time The design of adding three deviation rates is to quantify the influence of attachments through multi-dimensional data fusion; current deviation rate Reflects the increase of the load on the crushing roller 5: the more attachments there are, the greater the friction resistance between the roller and the raw material, and the more significant the increase in motor current (for example, if the current increases from 10A to 12A, the deviation rate is 20%); the pressure deviation rate Reflects the degree of filter hole blockage: When the filter hole is blocked by attachments, the blower resistance increases, and the air pressure at the bottom of the crusher 4 increases (for example, from 5kPa to 6kPa, the deviation rate is 20%); the flow deviation rate Characterizes the decline in conveying efficiency: the attachments hinder the falling of the raw materials, and the conveying flow of the reinforced hose 22 is reduced (for example, from 10kg / min to 8kg / min, the deviation rate is 20%); the three deviation rates are all positively correlated with the amount of attachments, and after adding them together, the proportional coefficient is obtained. (Set according to the viscosity of the raw material, such as high viscosity raw material 50g / min) into a specific adhesion amount; this multi-parameter fusion approach avoids the limitations of a single indicator (for example, current increase may be caused by voltage fluctuations) and improves the accuracy of adhesion calculation; The amount of raw material attached to the crushing roller 5 is obtained by multiplying the time interval between the attachment moment and the current time by the attachment amount per unit time. The speed of the crushing roller 5 is reduced to the normal working speed. When the emergency stop is about 10% (and not less than 5%) of the ; Emergency stop to clean up the attachments through centrifugal force The role of , is the radius data of the crushing roller 5, and the angular velocity , is the mass of the attachment; the maximum centrifugal force that the surface of the crushing roller 5 can withstand is In order to reduce the damage to the crushing roller 5, , calculate , in the amount of adhesion achieve When , a cleanup signal is generated and passed to the execution module; After receiving the cleaning signal, the execution module stops the crushing operation and the speed of the crushing roller 5 is reduced to When the roller stops suddenly, the inertia is used to throw away the attachments on the crushing roller 5 to achieve the purpose of cleaning; At low speed (safety speed), when the crushing roller 5 stops suddenly, attached materials continue to move due to inertia, generating sliding friction with the roller surface and falling off under the action of gravity. If the roller stops suddenly at high speed, the centrifugal force of the attached materials is much greater than the static friction, and they may splash at high speed (posing a safety hazard). Components such as the drive belt and bearings are also subject to a huge inertial torque, which may cause slippage or breakage. The cleaning operation is designed as follows: first, the speed is reduced from the normal operating value to the safe speed (e.g., 1000 rpm to 100 rpm) via the inverter, and then the speed is allowed to stabilize for 2-3 seconds before the emergency stop is triggered. This process not only utilizes inertia for cleaning, but also reduces mechanical shock through the low-speed transition. For example, when the roller stops suddenly at 100 rpm, the material adhered to the roller surface has an inertial speed of approximately 1.57 m / s (much lower than the 15.7 m / s at high speed), allowing it to fall smoothly to the bottom of the crusher 4 and be carried into the mixing drum 3 by the subsequent screw feeder 9, avoiding secondary accumulation.

[0023] Working principle: When the present invention is used, first power on the device and turn on all electrical machinery. The raw materials are put into the crusher 4 through the top discharge port. The first motor 7 is started and the crushing roller 5 is driven to rotate in the cylindrical crushing wall 6 through the first transmission wheel and the first transmission belt 8. The crushing roller 5 cooperates with the crushing wall 6 to squeeze and shear the raw materials to achieve crushing. After crushing, the raw material particles that meet the filter hole size fall into the screw feeder 9. The second motor 10 drives the screw feeder 9 to rotate and transports the raw materials to the reinforced hose 22. Since the screw feeder 9 continuously transports raw materials to the reinforced hose 22, the raw materials will not be blocked inside the reinforced hose 22; large particles of raw materials remain in the crushing wall 6 and continue to be crushed. The third motor 15 is started and the drive disc is driven to rotate through the second transmission wheel and the second transmission belt 17. The drive disc cooperates with the drive ring 19 on the outside of the mixing barrel 3 , driving the mixing drum 3 to rotate. When the mixing drum 3 rotates, the internal conical block 23 enhances the turning and collision of the raw materials to achieve sufficient mixing; at the same time, the first transmission mechanism in the second transmission platform 2 can adjust the angle of the mixing drum 3, and the cylinder 12 pushes the slide plate 14 to move. At this time, the rack is engaged with the outer gear disk 24 for transmission, driving the second transmission platform 2 and the mixing drum 3 to rotate back and forth; during the mixing process, coolant is introduced into the cooling pipe 25. At this time, with the cooperation of the H-type rotary joint 21, the cooling pipe 25 inside the mixing drum 3 can operate normally when the coolant filling port and the drain port are kept unchanged, absorbing the heat generated by the friction of the raw materials and the mechanical operation during the mixing process, maintaining the temperature in the drum stable, and avoiding the deterioration of the raw materials due to high temperature. After the blending is completed, the inclination angle of the mixing drum 3 is adjusted with the help of the first transmission mechanism, and the raw materials are discharged from the discharge port to complete the crushing and blending process; finally, the power supply can be disconnected.

[0024] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A high-efficiency crushing and blending device for raw materials used in the preparation of polycarbonate, comprising a first transmission platform (1), a second transmission platform (2) rotatably mounted on the upper end of the first transmission platform (1), a mixing drum (3) rotatably mounted inside the second transmission platform (2), and a crusher (4) mounted at the rear end of the mixing drum (3), characterized in that: The mixing drum (3) is a double-layer structure, a cooling mechanism is installed in the interlayer of the mixing drum (3), a first transmission mechanism is installed inside the first transmission platform (1), a second transmission mechanism is installed inside the second transmission platform (2), four support rods are fixed to the bottom end of the crusher (4), a transmission box is installed at the rear end of the crusher (4), a first motor (7) is installed inside the transmission box, and a discharge port is obliquely opened at the top end of the crusher (4), and a crushing roller (5) is rotatably installed inside the crusher (4); The control box of the crushing and blending device is equipped with an intelligent control component, which includes an analysis module; The analysis module analyzes the particle size data transmitted from the acquisition module to determine whether the real-time crushing particle size needs to be adjusted. If adjustment is required, a speed control signal is generated, and the speed control signal and the adjustment amount data are transmitted to the execution module. The current data of the first motor (7), the air pressure data at the bottom of the crusher (4), and the raw material delivery flow data entering the mixing drum (3) transmitted from the acquisition module are analyzed to determine the amount of attachments on the crushing roller (5). When the amount of attachments reaches a threshold, a cleaning signal is generated, and the cleaning signal is transmitted to the execution module.

2. The high-efficiency crushing and blending device for raw materials for polycarbonate production according to claim 1, characterized in that: A crushing wall (6) is installed at the lower end of the crushing roller (5), and a plurality of filter holes are opened through the bottom of the crushing wall (6). A conical discharge port is installed at the bottom end of the crusher (4), and a screw feeder (9) is installed at the lower end of the conical discharge port. The conical discharge port is communicated with the interior of the screw feeder (9), and a second motor (10) for driving the screw feeder (9) is installed at the rear end of the screw feeder (9). A mounting plate (11) is fixed to the support rod, and the second motor (10) and the screw feeder (9) are both installed on the top surface of the mounting plate (11).

3. The high-efficiency crushing and blending device for raw materials for polycarbonate production according to claim 2, characterized in that: The first motor (7) output shaft and the crushing roller (5) rotating shaft are both fixedly connected to a first transmission wheel, and a first transmission belt (8) is sleeved on the outer sides of the two first transmission wheels.

4. The high-efficiency crushing and blending device for raw materials for polycarbonate production according to claim 1, characterized in that: The first transmission mechanism comprises a cylinder (12) mounted on the inner side of the first transmission platform (1) and two outer toothed discs (24) fixedly connected to the bottom surface of the second transmission platform (2); a slide plate (14) is mounted on the output end of the cylinder (12); the slide plate (14) is slidably mounted inside the first transmission platform (1), and two groups of racks are fixedly connected to the top surface of the slide plate (14); the two groups of racks are respectively engaged with corresponding outer toothed discs (24) for transmission.

5. The high-efficiency crushing and blending device for raw materials for polycarbonate production according to claim 4, characterized in that: Ear plates are fixedly connected to both sides of the top surface of the first transmission platform (1), and rotation grooves are provided on both ear plates. Guide plates (13) are fixedly connected to both sides of the bottom surface of the second transmission platform (2), and the two guide plates (13) are respectively located in corresponding rotation grooves.

6. The high-efficiency crushing and blending device for raw materials for polycarbonate production according to claim 1, characterized in that: The second transmission mechanism comprises a third motor (15) mounted inside the second transmission platform (2) and two sets of drive discs rotatably mounted inside the second transmission platform (2), wherein the two sets of drive discs are composed of two rotating discs (16), and the output shaft of the third motor (15) and the rotating shaft of the drive disc on one side are both fixedly connected with a second transmission wheel, the outer sides of the two second transmission wheels are sleeved with a second transmission belt (17), and the top ends of both sides of the second transmission platform (2) are both rotatably mounted with a limit block (18).

7. The high-efficiency crushing and blending device for raw materials for polycarbonate production according to claim 6, characterized in that: A driving ring (19) and two limiting rings (20) are fixedly connected to the outside of the mixing cylinder (3); the driving ring (19) is located on the inner side surfaces of the two rotating disks (16) and abuts against the inner side surfaces of the two rotating disks (16); the limiting block (18) is slidably mounted on the inner side surfaces of the two limiting rings (20); and a plurality of conical blocks (23) are fixedly connected to the inner wall of the mixing cylinder (3) at equal intervals.

8. The high-efficiency crushing and blending device for raw materials for polycarbonate production according to claim 1, characterized in that: The cooling mechanism comprises an H-shaped rotary joint (21) installed at the rear end of the mixing drum (3) feed port and a cooling pipe (25) installed in the interlayer of the mixing drum (3), wherein the H-shaped rotary joint (21) is provided with a water inlet and a water outlet, wherein the water inlet and the water outlet are respectively connected to the two ends of the cooling pipe (25), and the front end of the H-shaped rotary joint (21) is connected to the mixing drum (3) feed port via a flange, and the rear end of the H-shaped rotary joint (21) is provided with a reinforced hose (22) via a flange, and the other end of the reinforced hose (22) is connected to the screw feeder (9).

9. The high-efficiency crushing and blending device for raw materials for polycarbonate production according to claim 1, characterized in that: The steps for particle size analysis in the analysis module are as follows: S1: Sort the granularity data detected in real time within the set time period according to the collection time, and sort the granularity data collected at the same time. The average of the particle size data and standard deviation Calculation of the mean value and standard deviation Detection of particle size data fluctuation range The setting of the detection granularity data that is not within the fluctuation range is marked as an outlier, and the number of outliers is Perform statistics, if , then the detection moment is marked as an abnormal moment, is the preset proportional coefficient; S2: After the abnormality occurs, the particle size sensor performs a self-check operation. If the self-check is found to be correct, it is determined that the detected particle size data is abnormal; otherwise, it is determined that the particle size sensor is abnormal, and a maintenance signal is generated and transmitted to the execution module; S3: Particle size after crushing Inversely proportional to the speed of the crushing roller (5) and the gap , Raw material hardness Proportional to granularity , is the correction factor related to the equipment structure; After the detection granularity data is determined to be abnormal, the abnormal granularity data With normal granularity data For comparison, if , a speed control signal is generated, and the speed adjustment amount is calculated based on the difference between the abnormal granularity data and the normal granularity data, and the speed control signal and adjustment amount data are passed to the execution module.

10. The high-efficiency crushing and blending device for raw materials for polycarbonate production according to claim 1, characterized in that: The steps for the analysis module to analyze the amount of attachments are as follows: K1: The average of the current data and flow data at the non-abnormal time is used as the preset current threshold and preset traffic thresholds , according to the detected air pressure data, the fluctuation range of the air pressure data The detection data of the corresponding item is then compared with the threshold or fluctuation range of the corresponding item. If the detection data of the corresponding item exceeds the threshold or is not within the fluctuation range of the corresponding item, it is determined that the raw material has adhesive adhesion, and the adhesion count is increased by one; then the adhesion count is compared with the number of corresponding items. If the adhesion count exceeds half of the number of corresponding items, it is determined that adhesion has occurred, and the moment is marked as the adhesion moment; K2: Adhesion amount per unit time , is the proportionality coefficient related to the raw material characteristics, 、 、 The current, air pressure and flow data are detected in real time respectively, and the amount of raw material attached to the crushing roller (5) is obtained by multiplying the time interval between the attachment moment and the current time by the amount of attachment per unit time; K3: Safe speed , is the normal operating speed; the maximum centrifugal force that the crushing roller (5) surface can withstand is ,according to Calculate , in the amount of adhesion achieve When , a cleanup signal is generated and passed to the execution module. is the radius data of the crushing roller (5), the angular velocity , The mass of the attachment.

Images