A high-efficiency crushing and blending device for raw materials used in polycarbonate preparation

Abstract

This invention discloses a high-efficiency crushing and blending device for raw materials used in polycarbonate preparation, relating to the field of high-efficiency crushing technology. It includes a first transmission platform, a second transmission platform rotatably mounted on the upper part of the first transmission platform, a mixing cylinder rotatably mounted inside the second transmission platform, and a crusher installed at the rear end of the mixing cylinder. This invention uses a screw feeder to deliver the crushed raw materials into the mixing cylinder, preventing accumulation of raw materials within the crusher. The installation of cooling pipes facilitates the removal of heat generated during the mixing process, improving the stability of the blending process. Through comprehensive analysis of current, air pressure, and flow rate data by an analysis module, the cumulative total amount of material adhering to the material is calculated in real time. A cleaning signal is triggered when the amount of material adhering to the equipment reaches its maximum centrifugal force tolerance threshold. Before cleaning, the rotation speed is reduced to a safe speed to ensure that the centrifugal force of the adhering material during emergency stop is less than or equal to the surface tolerance limit of the crushing roller, preventing impact damage to the crushing roller, transmission belt, and other components from the adhering material, and extending the service life of the equipment.

Description

Technical Field

[0001] This invention relates to the field of polycarbonate crushing and mixing equipment, and in particular to a high-efficiency crushing and mixing device for polycarbonate preparation raw materials. Background Technology

[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, the crushing and blending of raw materials are key steps. The uniformity of particle size of crushed raw materials 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. Traditional crushers have a simple crushing structure, making it difficult to fully crush the raw materials to the appropriate particle size, resulting in uneven blending and affecting the physical properties of polycarbonate products. In the blending stage, most devices use simple stirring methods, which can easily lead to local concentration differences in the raw materials during the mixing process, making it impossible to achieve full and uniform mixing. Moreover, during long-term crushing and blending, the heat generated by friction of the raw materials cannot be dissipated in time, which may cause changes in the properties of the raw materials and even pose safety hazards.

[0004] Therefore, the above problems need to be addressed. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing an efficient crushing and blending device for raw materials used in the preparation of polycarbonate.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a high-efficiency crushing and blending device for raw materials used in polycarbonate preparation, comprising a first transmission platform, a second transmission platform rotatably mounted on the upper part of the first transmission platform, a mixing cylinder rotatably mounted inside the second transmission platform, and a crusher mounted at the rear end of the mixing cylinder. The mixing cylinder has a double-layer structure, and a cooling mechanism is installed in the interlayer of the mixing cylinder. A first transmission mechanism is installed inside the first transmission platform, and a second transmission mechanism is installed inside the second transmission platform. Four support rods are fixedly connected to the bottom end of the crusher. A transmission box is installed at the rear end of the crusher, and a first motor is installed inside the transmission box. A feed port is obliquely opened at the top of the crusher, and a crushing roller is rotatably mounted inside the crusher.

[0007] The control box of the crushing and blending device is equipped with an intelligent control component, which includes an analysis module.

[0008] The analysis module analyzes the particle size data transmitted from the acquisition module to determine whether the real-time crushing particle size needs adjustment. If adjustment is required, it generates a speed adjustment signal and transmits the speed adjustment signal and adjustment amount data to the execution module. The analysis module also analyzes the current data of the first motor, the air pressure data at the bottom of the crusher, and the raw material conveying flow data entering the mixing drum transmitted from the acquisition module to determine the amount of adhering material on the crushing roller. When the amount of adhering material reaches a threshold, it generates a cleaning signal and transmits the cleaning signal to the execution module.

[0009] Preferably, a crushing wall is installed at the lower end of the crushing roller, and multiple filter holes are opened through the bottom of the crushing wall. A conical discharge port is installed at the bottom of the crusher, and a screw feeder is installed at the lower end of the conical discharge port. The conical discharge port is connected to the inside of the screw feeder, and a second motor for driving the screw feeder is installed at the rear end of the screw feeder. An 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.

[0010] Preferably, a first transmission wheel is fixedly connected to both the output shaft of the first motor and the shaft of the crushing roller, and a first transmission belt is sleeved on the outer side of the two first transmission wheels.

[0011] Preferably, the first transmission mechanism includes a cylinder installed on the inner side of the first transmission platform and two external gear discs fixed to the bottom surface of the second transmission platform. A slide plate is installed at the output end of the cylinder. The slide plate is slidably installed inside the first transmission platform, and two sets of racks are fixed to the top surface of the slide plate. The two sets of racks mesh with the corresponding external gear discs for transmission.

[0012] Preferably, ear plates are fixedly connected to both sides of the top surface of the first transmission table, and each of the two ear plates is provided with a rotating groove. Guide plates are fixedly connected to both sides of the bottom surface of the second transmission table, and the two guide plates are respectively located in the corresponding rotating grooves.

[0013] Preferably, the second transmission mechanism includes a third motor installed inside the second transmission table and two sets of drive discs rotatably installed inside the second transmission table. Each set of drive discs consists of two turntables, and a second transmission wheel is fixedly connected to the output shaft of the third motor and the drive disc shaft on one side. A second transmission belt is sleeved on the outer side of the two second transmission wheels, and limit blocks are rotatably installed on the top of both sides of the second transmission table.

[0014] Preferably, a drive ring and two limiting rings are fixedly connected to the outside of the mixing cylinder. The drive ring is located on the inner side of the two turntables and abuts against the inner side of the two turntables. The limiting block is slidably installed on the inner side of the two limiting rings. A plurality of conical blocks are fixedly connected at equal intervals on the inner wall of the mixing cylinder.

[0015] Preferably, the cooling mechanism includes an H-shaped rotary joint installed at the rear end of the mixing drum inlet and a cooling pipe installed in the mixing drum jacket. The H-shaped rotary joint is equipped with a water inlet and a water outlet, which are respectively connected to both ends of the cooling pipe. The front end of the H-shaped rotary joint is connected to the mixing drum inlet via a flange, and the rear end of the H-shaped rotary joint is equipped with a reinforcing hose via a flange. The other end of the reinforcing hose is connected to the screw feeder.

[0016] Preferably, the analysis module performs granularity analysis in the following steps:

[0017] S1: Sort the granular data detected in real time within a set time period according to the collection time, and sort the data collected at the same time. Average the data at each granularity level and standard deviation The calculation, using the calculated mean and standard deviation Detect the fluctuation range of particle size data The settings include marking detection granularity data that is outside the fluctuation range as outliers, and controlling the number of outliers. If statistics are performed, If so, the detection time will be marked as an abnormal time. This is a preset proportional coefficient;

[0018] S2: After an anomaly occurs, a self-test operation of the particle size sensor is performed. If the self-test finds no error, it is determined that the particle size data is abnormal; otherwise, it is determined that the particle size sensor is abnormal, a maintenance signal is generated, and the maintenance signal is transmitted to the execution module.

[0019] S3: Particle size after crushing With the crushing roller at 5 speed Inversely proportional to the gap Raw material hardness Proportional, granularity , This is a correction factor related to the equipment structure; after determining that the detection granularity data is abnormal, the abnormal granularity data... Compared with normal granularity data If a comparison is made, Then, a speed regulation signal is generated, and the speed adjustment amount is calculated based on the difference between abnormal granularity data and normal granularity data. The speed regulation signal and adjustment amount data are then transmitted to the execution module.

[0020] Preferably, the steps for the analysis module to perform the attachment quantity analysis are as follows:

[0021] K1: The average values ​​of current and flow data at non-abnormal times are used as preset current thresholds. and preset traffic threshold The fluctuation range of air pressure data is determined based on the detected air pressure data. The settings are then configured, and the detection data of the corresponding item is 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 there is sticky adhesion of raw materials, and the adhesion count is incremented 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 has occurred, and the moment is marked as the adhesion moment.

[0022] K2: Adhesion amount per unit time , A proportionality coefficient related to the characteristics of the raw materials. , , The amount of raw material adhering to the crushing roller is obtained by multiplying the time interval between the adhesion moment and the current time by the amount of adhesion per unit time, which are the current, air pressure, and flow rate data detected in real time.

[0023] K3: Safe Speed , This is the normal operating speed; the maximum centrifugal force that the crushing roller surface can withstand is... ,according to Calculate In terms of adhesion amount achieve At that time, a cleanup signal is generated and transmitted to the execution module. The data includes the radius and angular velocity of the crushing roller. , The mass of the attached material.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. Through the coordination of the crushing wall, crushing roller, second motor, and screw feeder, the airflow facilitates the blowing of crushed raw materials into the mixing drum through reinforced hoses, thereby preventing raw material accumulation within the crusher, improving the efficiency of raw material conveying, and achieving continuous crushing and conveying. Furthermore, the coordination of the first transmission mechanism, second transmission mechanism, and cone block facilitates the simultaneous rotation of the mixing drum on both the X and Y axes, further improving mixing efficiency. The installation of cooling pipes facilitates the removal of heat generated during raw material mixing, preventing changes in the properties of the raw materials due to high temperatures and improving the stability of the blending process. This solves the problems of raw material accumulation in the crushing roller, poor mixing effect, and property changes due to heat during processing in existing devices.

[0026] 2. By analyzing the mean and standard deviation of particle size data and identifying outliers, the module can accurately identify abnormal fluctuations in crushed particle size. Combined with the quantitative relationship between particle size and rotation speed, a speed adjustment signal is automatically generated when particle size is abnormal. The execution module dynamically adjusts the crushing roller speed. When the particle size is too large, the rotation speed is increased to enhance crushing intensity; when the particle size is too small, the rotation speed is reduced to avoid over-crushing. This ensures that the particle size of the raw material after crushing remains 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.

[0027] 3. Through comprehensive analysis of current, air pressure, and flow data by the analysis module, the amount of adhesion per unit time is calculated in real time and the total amount of adhesion is accumulated. When the amount of adhesion reaches the maximum centrifugal force tolerance threshold of the equipment, a cleaning signal is triggered. Before cleaning, the speed is reduced to a safe speed to ensure that the centrifugal force of the adhesion is less than or equal to the tolerance limit of the crushing roller surface during emergency stop, so as to avoid impact damage to the crushing roller, transmission belt and other components by the adhesion and extend the service life of the equipment. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0029] Figure 1 This is a schematic diagram of the overall appearance of the device proposed in this invention;

[0030] Figure 2 This is a schematic diagram of the cross-sectional structure of the crusher proposed in this invention;

[0031] Figure 3 This is a schematic diagram of the second transmission mechanism proposed in this invention;

[0032] Figure 4 This is a schematic diagram of the cross-sectional structure of the mixing cylinder proposed in this invention;

[0033] Figure 5 This is a schematic diagram of the cooling mechanism structure proposed in this invention;

[0034] Figure 6 This is a flowchart of the system proposed in this invention.

[0035] The following are the components listed in the diagram: 1. First transmission table; 2. Second transmission table; 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. Limiting block; 19. Drive ring; 20. Limiting ring; 21. H-type rotary joint; 22. Reinforced flexible hose; 23. Conical block; 24. External gear disc; 25. Cooling pipe. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0037] Example 1: See Figures 1 to 6This invention discloses a high-efficiency crushing and blending device for polycarbonate preparation raw materials, 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 cylinder 3 rotatably mounted inside the second transmission platform 2, and a crusher 4 installed at the rear end of the mixing cylinder 3. The first transmission platform 1 and the second transmission platform 2 facilitate the rotation of the mixing cylinder 3 along the X and Y axes. The mixing cylinder 3 has a double-layer structure, with a cooling mechanism installed in the interlayer. A first transmission mechanism is installed inside the first transmission platform 1, and a second transmission mechanism is installed inside the second transmission platform 2. The crusher 4... Four support rods are fixed to the bottom. A transmission box is installed at the rear of the crusher 4, and a first motor 7 is installed inside the transmission box. The first motor 7 works in conjunction with the first transmission wheel and the first transmission belt 8 to drive the crushing roller 5 to rotate. A feed port is obliquely opened at the top of the crusher 4. The crushing roller 5 is rotatably installed inside the crusher 4. The crushing roller 5 works in conjunction with the crushing wall 6 to crush the raw materials. The crushing wall 6 is installed at the lower end of the crushing roller 5. Multiple filter holes are opened through the bottom of the crushing wall 6. A conical feed port is installed at the bottom of the crusher 4. A screw feeder 9 is installed at the lower end of the conical feed port. The screw feeder 9 facilitates the continuous conveying of crushed raw materials to the mixing drum 3; the conical discharge port communicates 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 rotation of the screw feeder 9; a mounting plate 11 is fixedly connected to the support rod, which facilitates the installation of the second motor 10 and the screw feeder 9; both the second motor 10 and the screw feeder 9 are mounted on the top surface of the mounting plate 11, and first transmission wheels are fixedly connected to the output shaft of the first motor 7 and the rotating shaft of the crushing roller 5, with two first transmission wheels... The outer side is fitted with a first transmission belt 8. The first transmission mechanism includes a cylinder 12 installed on the inner side of the first transmission platform 1 and two external gear discs 24 fixed to the bottom surface of the second transmission platform 2. The cylinder 12 facilitates the reciprocating movement of the slide plate 14; the external gear discs 24 facilitate the rotation of the second transmission platform 2. The output end of the cylinder 12 is fitted with a slide plate 14, which facilitates the installation of racks to cooperate with the rotation of the external gear discs 24. The slide plate 14 is slidably installed inside the first transmission platform 1, and two sets of racks are fixed to the top surface of the slide plate 14. The two sets of racks mesh with the corresponding external gear discs 24 for transmission.

[0038] In this invention, ear plates are fixedly connected to both sides of the top surface of the first transmission platform 1, and each ear plate has a rotating groove. Guide plates 13 are fixedly connected to both sides of the bottom surface of the second transmission platform 2, which facilitates the rotation of the external gear disk 24. The two guide plates 13 are respectively located in the corresponding rotating grooves. The second transmission mechanism includes a third motor 15 installed inside the second transmission platform 2 and two sets of drive disks rotatably installed inside the second transmission platform 2. The third motor 15 facilitates the rotation of one set of drive disks. Both sets of drive disks are composed of two turntables 16. One set of drive discs facilitates the rotation of the mixing drum 3, while another set of drive discs assists in its rotation. Second transmission wheels are fixedly connected to the output shaft of the third motor 15 and the shaft of one of the drive discs. Second transmission belts 17 are sleeved on the outer sides of the two second transmission wheels, allowing the third motor 15 to drive one set of drive discs to rotate. Limiting blocks 18 are rotatably mounted on the top of both sides of the second transmission platform 2, facilitating the simultaneous rotation of the mixing drum 3 along the X and Y axes. A drive ring 19 and two limiting rings 20 are fixedly connected to the outer side of the mixing drum 3. The drive ring 19 facilitates the rotation of the mixing cylinder 3 by cooperating with the drive disc; the limiting ring 20 facilitates the installation of the limiting block 18; the drive ring 19 is located on the inner side of the two turntables 16, and the drive disc and drive ring 19 are driven by meshing gear blocks and abut against the inner side of the two turntables 16; the limiting block 18 is slidably installed on the inner side of the two limiting rings 20, and multiple conical blocks 23 are fixedly connected at equal intervals on the inner wall of the mixing cylinder 3, which facilitates faster mixing efficiency and improved mixing effect; the cooling mechanism includes an H-type rotary joint 2 installed at the rear end of the feed inlet of the mixing cylinder 3. The cooling pipe 25 installed in the jacket of the mixing drum 3 is connected to the cooling pipe 25 via an H-type rotary joint 21 to facilitate cooling of the mixing drum 3. The H-type rotary joint 21 is equipped with a water inlet and a water outlet, which are connected to both ends of the cooling pipe 25 respectively. The front end of the H-type rotary joint 21 is connected to the feed port of the mixing drum 3 via a flange. The rear end of the H-type rotary joint 21 is equipped with a reinforcing hose 22 via a flange, which facilitates feeding when the mixing drum 3 rotates. The other end of the reinforcing hose 22 is connected to the screw feeder 9.

[0039] Example 2: See Figure 6 The control box of the crushing and blending device is equipped with intelligent control components, which include a data acquisition module, an analysis module, and an execution module.

[0040] The data acquisition module collects particle size data, rotational speed data of crushing roller 5, current data supplied to crushing roller 5 for rotation, and air pressure data at the bottom of crusher 4, and transmits the collected data to the analysis module.

[0041] The analysis module analyzes the particle size data transmitted from the acquisition module to determine whether the real-time crushing particle size needs adjustment. If adjustment is required, it generates a speed adjustment signal and transmits the speed adjustment signal and adjustment amount data to the execution module. It also analyzes the current, air pressure, and flow rate data transmitted from 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 raw material conveying flow rate data entering the mixing drum 3 through the reinforced hose 22) to determine the amount of deposits on the crushing roller 5. When the amount of deposits reaches a threshold, it generates a cleaning signal and transmits the cleaning signal to the execution module.

[0042] A particle size sensor is installed inside the crushing wall 6 to detect the particle size data of falling particles in real time. The particle size data detected in real time within a set time period are sorted according to the acquisition time, and the particle size data acquired at the same time is grouped together. Average the data at each granularity level and standard deviation The calculation, using the calculated mean and standard deviation Detect the fluctuation range of particle size data The settings include marking detection granularity data that is outside the fluctuation range as outliers, and controlling the number of outliers. If statistics are performed, If so, the detection time will be marked as an abnormal time. This is a preset proportional coefficient;

[0043] Upon the occurrence of an anomaly, a self-test operation is performed on the particle size sensor (the photodiode inside the sensor starts monitoring the output power of the light source, the system records the current power value and compares it with the factory calibration value or historical normal value. If the power drift exceeds the set threshold (e.g., ±2%), the system records the anomaly and triggers an alarm). If the self-test finds no errors, it is determined that the detected particle size data is abnormal; otherwise, it is determined that the particle size sensor is abnormal, a maintenance signal is generated, and the maintenance signal is transmitted to the execution module.

[0044] The core of particle size sensor self-testing is monitoring the power drift of the light source, with a threshold set at ±2%. This standard stems from the sensor's working principle and detection accuracy requirements. The particle size sensor analyzes particle size using diffraction patterns after irradiating particles with a laser. 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 (e.g., when the power is too low, the diffraction signal of fine particles may be misjudged as that of large particles). During self-testing, the photodiode inside the sensor monitors the output power of the light source in real time and compares it with the factory calibration value or the average power of the last three normal tests. For example, if the factory power is 100mW, and the current power drops to 97mW (drift -3%), the sensor is considered abnormal. This threshold balances the actual performance of the equipment (the light source has slight natural attenuation) with detection reliability, avoiding misjudgments due to slight fluctuations (e.g., ±1% drift is acceptable) while promptly detecting faults affecting detection accuracy, ensuring the validity of particle size data and providing reliable input for the analysis module.

[0045] 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 maintained, so that the maintenance personnel can accurately locate the abnormal location.

[0046] Particle size after crushing With the crushing roller at 5 speed Inversely proportional to the gap Raw material hardness Proportional, granularity , This is a correction factor related to the equipment structure; after determining that the detection granularity data is abnormal, the abnormal granularity data... Compared with normal granularity data If a comparison is made, Then, a speed regulation signal is generated, and the speed adjustment amount is calculated based on the difference between abnormal granularity data and normal granularity data. The speed regulation signal and adjustment amount data are then transmitted to the execution module.

[0047] After receiving the speed control signal, if the execution module... Then, the speed increase is adjusted according to the adjustment amount; if Then, the speed will be reduced according to the adjustment amount.

[0048] The current change of the crushing roller 5, the air pressure change at the bottom of the crusher 4, and the flow rate of the raw material entering the mixing drum 3 are monitored. The current, air pressure, and flow rate data monitored at non-abnormal times are analyzed. The average values ​​of the current and flow rate data at non-abnormal times are used as preset current thresholds. and preset traffic threshold The fluctuation range of air pressure data is determined based on the detected air pressure data. The system sets the parameters, then compares the detection data of the corresponding item with the corresponding threshold or fluctuation range. If the detection data of the corresponding item exceeds the threshold or is outside the fluctuation range of the corresponding item, it is determined that there is adhesive adhesion of raw materials, and the adhesion count is incremented by one. Then, the adhesion count is compared with the number of items in the corresponding item. If the adhesion count exceeds half of the number of items in the corresponding item, it is determined that adhesion has occurred, and this moment is marked as the adhesion moment. The amount of adhesion per unit time is... , A proportionality coefficient related to the characteristics of the raw materials. , , These are the real-time detected current, air pressure, and flow rate data, respectively.

[0049] Formula for adhesion amount per unit time In this design, the three deviation rates are added together to quantify the impact of adhering substances through multi-dimensional data fusion; current deviation rate The increased load on crushing roller 5 is reflected in the following: the more deposits there are, the greater the frictional resistance between the roller and the raw material, and the more significant the increase in motor current (e.g., current increases from 10A to 12A, with a deviation rate of 20%); air pressure deviation rate. Indicating the degree of filter pore blockage: After the filter pores are blocked by deposits, the blower's air resistance increases, and the air pressure at the bottom of crusher 4 rises (e.g., from 5 kPa to 6 kPa, with a deviation rate of 20%); flow rate deviation rate. The decrease in conveying efficiency is characterized by: deposits hindering the material's descent, reducing the conveying flow rate of the reinforced hose 22 (e.g., from 10 kg / min to 8 kg / min, with a deviation rate of 20%); all three deviation rates are positively correlated with the amount of deposits, and their summation is proportional to the coefficient. (Set according to the viscosity of the raw material, such as high viscosity raw material) The 50g / min) is converted into a specific adhesion amount; this multi-parameter fusion method avoids the limitations of a single indicator (such as the current increase may be caused by voltage fluctuations) and improves the accuracy of adhesion amount calculation.

[0050] The amount of raw material adhering to the crushing roller 5 is obtained by multiplying the time interval between the adhesion moment and the current time by the amount of material adhering per unit time. The rotation speed of the crushing roller 5 is then reduced to the normal operating speed. When the damage from an emergency stop is around 10% (but not less than 5%), the damage to the device is minimal. Emergency stop to remove attached substances using centrifugal force The function, , The data includes the radius and angular velocity of crushing roller 5. , The mass of the attached material; the maximum centrifugal force that the surface of the crushing roller 5 can withstand is To reduce damage to the crushing roller 5, Calculate In terms of adhesion amount achieve When the time comes, a cleanup signal is generated and transmitted to the execution module;

[0051] After receiving the cleaning signal, the execution module stops the crushing operation and reduces the rotational speed of the crushing roller 5 to [missing value]. When the machine stops suddenly, it uses inertia to fling off the residue adhering to the crushing roller 5, thus achieving a cleaning effect.

[0052] At low speed (safe speed), when the crushing roller 5 stops suddenly, the attached material continues to move due to inertia, generating sliding friction with the roller surface, and simultaneously falling off under gravity. If the sudden stop is made at high speed, the centrifugal force of the attached material is much greater than the static friction, which may cause it to splash at high speed (posing a safety hazard), and the transmission belt, bearings and other components will have to withstand huge inertial torque (which may lead to slippage or breakage). The cleaning operation is designed as follows: first, the speed is reduced from the normal operating speed to the safe speed (e.g., 1000r / min → 100r / min) through the frequency converter, and then the speed is stabilized for 2-3 seconds before the sudden stop is triggered. This process utilizes inertia to achieve cleaning and reduces mechanical impact through low-speed transition. For example, if the raw material attached to the roller surface stops suddenly at 100r / min, its inertial velocity is about 1.57m / s (far lower than 15.7m / s at high speed), and it can fall smoothly to the bottom of the crusher 4, where it is carried into the mixing drum 3 by the subsequent screw feeder 9, avoiding secondary accumulation.

[0053] Working Principle: When using this invention, firstly, power on the device and turn on all electrical machinery. Raw materials are fed into the crusher 4 through the top feed port. The first motor 7 starts, driving the crushing roller 5 to rotate inside the cylindrical crushing wall 6 via the first transmission wheel and first transmission belt 8. The crushing roller 5 cooperates with the crushing wall 6 to squeeze and shear the raw materials, achieving crushing. After crushing, raw material particles that meet the filter pore size fall into the screw feeder 9. The second motor 10 drives the screw feeder 9 to rotate, conveying the raw materials to the reinforced hose 22. Because the screw feeder 9 continuously conveys raw materials into the reinforced hose 22, the raw materials will not cause blockage inside the reinforced hose 22. Larger raw material particles remain inside the crushing wall 6 for further crushing. The third motor 15 starts, driving the drive disc to rotate via the second transmission wheel and second transmission belt 17. The drive disc cooperates with the drive ring 19 on the outer side of the mixing cylinder 3. The mixing drum 3 is rotated, and the internal cone-shaped blocks 23 enhance the tumbling and collision of the raw materials, achieving thorough mixing. At the same time, the first transmission mechanism in the second transmission table 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 and the outer gear plate 24 mesh and drive, driving the second transmission table 2 and the mixing drum 3 to reciprocate and tilt. During the mixing process, coolant is introduced into the cooling pipe 25. With the cooperation of the H-type rotary joint 21, the cooling pipe 25 inside the mixing drum 3 can operate normally without the coolant filling port and drain port moving. It absorbs the heat generated by the friction of the raw materials and mechanical operation during the mixing process, maintains the temperature inside the drum stable, and avoids the raw materials from deteriorating due to high temperature. After the mixing is completed, the tilt 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, completing the crushing and mixing process. Finally, the power is turned off.

[0054] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-efficiency crushing and blending device for raw materials used in polycarbonate preparation, comprising a first transmission table (1), a second transmission table (2) rotatably mounted on the upper end of the first transmission table (1), a mixing cylinder (3) rotatably mounted inside the second transmission table (2), and a crusher (4) mounted at the rear end of the mixing cylinder (3), characterized in that: The mixing drum (3) has 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 table (1). A second transmission mechanism is installed inside the second transmission table (2). Four support rods are fixed to the bottom of 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 and determines whether the real-time crushing particle size needs to be adjusted. If adjustment is required, a speed adjustment signal is generated and the speed adjustment signal and adjustment amount data are transmitted to the execution module. The current, air pressure and flow data transmitted from the acquisition module are analyzed to determine the amount of adhering material on the crushing roller (5). When the amount of adhering material reaches the threshold, a cleaning signal is generated and transmitted to the execution module. The steps for the analysis module to perform attachment quantity analysis are as follows: K1: The average values ​​of current and flow data at non-abnormal times are used as preset current thresholds. and preset traffic threshold The fluctuation range of air pressure data is determined based on the detected air pressure data. The settings are then configured, and the detection data of the corresponding item is 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 there is sticky adhesion of raw materials, and the adhesion count is incremented 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 has occurred, and the moment is marked as the adhesion moment. K2: Adhesion amount per unit time , A proportionality coefficient related to the characteristics of the raw materials. , , The current, air pressure, and flow rate data detected in real time are respectively used to obtain the amount of raw material attached to the crushing roller (5) by multiplying the time interval between the attachment time and the current time by the amount of attachment per unit time. K3: Safe Speed , The normal operating speed; the maximum centrifugal force that the surface of the crushing roller (5) can withstand is ,according to Calculate In terms of adhesion amount achieve At that time, a cleanup signal is generated and transmitted to the execution module. The radius and angular velocity of the crushing roller (5) are given. , The mass of the attached material.

2. The high-efficiency crushing and blending device for raw materials used in polycarbonate preparation according to claim 1, characterized in that: The crusher (4) is equipped with a transmission box at the rear end, and a first motor (7) is installed inside the transmission box. The crusher (4) has a feed port at the top of the crusher (4) at an angle. A crushing roller (5) is rotatably installed inside the crusher (4). A crushing wall (6) is installed at the lower end of the crushing roller (5). Multiple filter holes are opened through the bottom of the crushing wall (6). A conical feed port is installed at the bottom of the crusher (4). A screw feeder (9) is installed at the lower end of the conical feed port. The conical feed port is connected to the inside of the screw feeder (9). A second motor (10) for driving the screw feeder (9) is installed at the rear end of the screw feeder (9). An mounting plate (11) is fixed on the support rod. 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 used in polycarbonate preparation according to claim 2, characterized in that: The first motor (7) output shaft and the crushing roller (5) shaft are both fixed with first transmission wheels, and the two first transmission wheels are fitted with first transmission belts (8).

4. The high-efficiency crushing and blending device for raw materials used in polycarbonate preparation according to claim 1, characterized in that: The first transmission mechanism includes a cylinder (12) installed on the inner side of the first transmission platform (1) and two external gear discs (24) fixed to the bottom surface of the second transmission platform (2). A slide plate (14) is installed at the output end of the cylinder (12). The slide plate (14) is slidably installed inside the first transmission platform (1), and two sets of racks are fixed to the top surface of the slide plate (14). The two sets of racks mesh with the corresponding external gear discs (24) respectively.

5. The high-efficiency crushing and blending device for raw materials used in polycarbonate preparation according to claim 4, characterized in that: The first transmission platform (1) has ear plates fixed on both sides of its top surface, and each of the two ear plates has a rotating groove. The second transmission platform (2) has guide plates (13) fixed on both sides of its bottom surface, and the two guide plates (13) are respectively located in the corresponding rotating grooves.

6. The high-efficiency crushing and blending device for raw materials used in polycarbonate preparation according to claim 1, characterized in that: 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). Each set of drive discs consists of two turntables (16). The output shaft of the third motor (15) and the drive disc shaft on one side are both fixedly connected to a second transmission wheel. A second transmission belt (17) is sleeved on the outside of the two second transmission wheels. Limit blocks (18) are rotatably installed on the top of both sides of the second transmission platform (2).

7. The high-efficiency crushing and blending device for raw materials used in polycarbonate preparation according to claim 6, characterized in that: A drive ring (19) and two limiting rings (20) are fixedly connected to the outside of the mixing cylinder (3). The drive ring (19) is located on the inner side of the two turntables (16) and abuts against the inner side of the two turntables (16). The limiting block (18) is slidably installed on the inner side of the two limiting rings (20). A plurality of cone-shaped blocks (23) are fixedly connected at equal intervals on the inner wall of the mixing cylinder (3).

8. The high-efficiency crushing and blending device for raw materials used in polycarbonate preparation according to claim 1, characterized in that: The cooling mechanism includes an H-type rotary joint (21) installed at the rear end of the feed inlet of the mixing drum (3) and a cooling pipe (25) installed in the jacket of the mixing drum (3). The H-type rotary joint (21) is equipped with a water inlet and a drain outlet, which are respectively connected to both ends of the cooling pipe (25). The front end of the H-type rotary joint (21) is connected to the feed inlet of the mixing drum (3) through a flange. The rear end of the H-type rotary joint (21) is equipped with a reinforced hose (22) through a flange. 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 used in polycarbonate preparation according to claim 1, characterized in that: The steps for granularity analysis in the analysis module are as follows: S1: Sort the granular data detected in real time within a set time period according to the collection time, and sort the data collected at the same time. Average the data at each granularity level and standard deviation The calculation, using the calculated mean and standard deviation Detect the fluctuation range of particle size data The settings include marking detection granularity data that is outside the fluctuation range as outliers, and controlling the number of outliers. If statistics are performed, If so, the detection time will be marked as an abnormal time. This is a preset proportional coefficient; S2: After an anomaly occurs, a self-test operation of the particle size sensor is performed. If the self-test finds no error, it is determined that the particle size data is abnormal; otherwise, it is determined that the particle size sensor is abnormal, a maintenance signal is generated, and the maintenance signal is transmitted to the execution module. S3: Particle size after crushing It is inversely proportional to the rotational speed of the crushing roller (5) and the gap. Raw material hardness Proportional, granularity , This is a correction factor related to the equipment structure; After determining that the detection granularity data is abnormal, the abnormal granularity data will be... Compared with normal granularity data If a comparison is made, Then, a speed regulation signal is generated, and the speed adjustment amount is calculated based on the difference between abnormal granularity data and normal granularity data. The speed regulation signal and adjustment amount data are then transmitted to the execution module.

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