Sealing strengthening assembly for stirring shaft of raw material medicine mixing machine

Abstract

The invention discloses a raw material mixing machine stirring shaft sealing strengthening assembly which comprises an assembly sleeve, and an inner filling sleeve is fixedly connected to the interior of the assembly sleeve. Through the arrangement of the side through cavity and the inner mounting sleeve, a gas circulation cavity is formed in the side through cavity and the inner mounting sleeve after mounting, the micro pressure sensor is matched, when it is detected that the pressure in the assembly sleeve is greatly increased, the pressure in the mixing machine changes, gas is injected into the assembly sleeve through gas supply equipment, and the pressure in the mixing machine changes; the gas pressure in the assembly sleeve is increased, the static ring and the movable ring can be secondarily extruded, the sealing effect is improved, medicine in the mixer is prevented from flowing out, meanwhile, the up-down double-sealing type design is adopted, the sealing effect is further improved, meanwhile, the internal pressing force can be adjusted according to different pressure changes in the mixer, and the sealing effect is improved. Excessive abrasion of a sealing piece caused by too high pressure can be prevented, sealing failure when the pressure is reduced can be avoided, the sealing reliability is remarkably improved, and the maintenance frequency is reduced.

Description

Technical Field

[0001] This invention relates to the field of pharmaceutical production technology, specifically to a sealing reinforcement component for the stirring shaft of a raw material mixer. Background Technology

[0002] In pharmaceutical production, depending on the specific drug, its raw materials need to be mixed using a mixer to form the final product. A pharmaceutical mixer is a machine primarily used in laboratories to uniformly mix dry or wet powders in varying proportions. It is constructed of stainless steel, making it corrosion-resistant, and its transmission mechanism uses a worm gear direct drive to ensure smooth operation.

[0003] In existing technologies, during drug production, a sealing component needs to be installed between the stirring shaft and the mixing tank of the drug mixer to prevent external moisture, dust, and other impurities from entering. However, the seal between the mixer and the stirring shaft is relatively simple, often using a lip seal in conjunction with a cap. During use, the pressure cannot be adjusted, and when the internal pressure of the mixer is too high, gaps can easily form between the lip seal and the shaft, making it impossible to adjust the sealing effect and resulting in limited sealing performance. Summary of the Invention

[0004] The purpose of this invention is to provide a sealing reinforcement component for the stirring shaft of a pharmaceutical raw material mixer, in order to solve the problem mentioned in the background art that, during the use of a pharmaceutical mixer, a sealing component is required between the stirring shaft and the mixing tank to prevent external moisture, dust and other impurities from entering. However, the seal between the mixer and the stirring shaft is relatively simple, mostly using a lip seal in conjunction with a cap. During use, the pressure cannot be adjusted, and when the internal pressure of the mixer is too high, a gap can easily form between the lip seal and the shaft, making it impossible to adjust the sealing effect and resulting in limited sealing performance.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a sealing reinforcement assembly for the stirring shaft of a raw material mixer, comprising an assembly sleeve, an inner sleeve fixedly connected inside the assembly sleeve, the inner sleeve coinciding with the center line of the end groove, end grooves being formed at both the upper and lower ends of the assembly sleeve, side passage cavities being formed on both sides of the middle portion of the assembly sleeve, the two ends of the side passage cavities respectively communicating with the two end grooves, connecting discs fixedly connected to both the upper and lower ends of the assembly sleeve, a first-type sealing cap being provided at the upper end of the assembly sleeve, and the lower end of the assembly sleeve... The end is equipped with a second cover, one end of which is fixedly connected to two connecting discs by bolts. A first connection port is fixedly connected to the outer surface of the first cover. The first connection port is used to connect an electric control valve. The two electric control valves are used to connect an air supply device and an air extraction device, respectively. A second connection port is fixedly connected to the upper middle part of the outer surface of the assembly sleeve. A miniature pressure sensor is installed inside the second connection port. The assembly sleeve is used to install in the middle of the mixer end cover, and the second cover is located below the end cover.

[0006] Preferably, bearings are provided at the top and bottom of the center of the inner sleeve, and sealing filler is provided inside the inner sleeve between the two bearings.

[0007] Preferably, both ends of the inner sleeve are equipped with lip-shaped sealing rings, and the outer surface of the second cover is fixedly connected to a third connection port. There are three third connection ports, and a micro-leakage sensor, a humidity sensor, and a temperature sensor are respectively installed inside the three third connection ports, with the detection end facing the stirring shaft.

[0008] Preferably, both ends of the inner sleeve are provided with mechanical sealing mechanisms, and the mechanical sealing mechanism includes a stationary ring, a moving ring, a push ring, a spring, and a spring seat.

[0009] Preferably, one end of the spring seat has a slot, which engages with the end of the inner sleeve. Both ends of the spring seat and the push ring that are close to each other have limiting slots, and both ends of the spring engage with the two limiting slots respectively.

[0010] Preferably, the lower end of the moving ring is provided with a bottom groove, and one end of the push ring is rotatably connected to the bottom groove.

[0011] Preferably, the inner ring surface of the moving ring is provided with an inner ring groove, and a moving ring sealing ring is installed inside the inner ring groove. The moving ring and the stationary ring are rotatably connected, and the two stationary rings are respectively installed at one end inside the first and second sealing caps.

[0012] Preferably, the contact surface between the moving ring and the stationary ring is provided with a nano-coating with a thickness of 0.5-2 μm.

[0013] Preferably, the system further includes a data processing system, which comprises a data acquisition module, a data processing and control module, a data transmission module, and an execution alarm module. The data acquisition module includes a sensor module, an information conditioning module, a synchronous sampling module, and a data fusion module. The data processing and control module includes a temperature compensation module, a pressure adaptive module, a segmented control module, and a flow feedback module. The data transmission module includes a data frame encoding module, a wired backup module, a wireless transmission module, and a factory control system. The execution alarm module includes a fault alarm module and an electric valve.

[0014] Preferably, the sensor module consists of a micro-leakage sensor, a humidity sensor, a temperature sensor, and a miniature pressure sensor, used to collect sealing parameters and obtain raw data on pressure, temperature, humidity, and leakage status. The information conditioning module is used to process the raw signal output by the sensor, convert the 4-20mA analog signal of the miniature pressure sensor into a 0-3.3V standard signal, use an RC low-pass filter circuit to eliminate electromagnetic noise, and perform linearization calibration on the PT100 signal of the temperature sensor to ensure the stability and reliability of the data signal. The synchronous sampling module is used to control the sampling timing of the sensor. Based on the timer function of STM32H743IGH6, the sampling frequency of the sensor is unified to 50Hz, and the sampling frequency of the miniature pressure sensor is increased to 100Hz. The signal is received synchronously through the parallel interface to avoid data deviation caused by sampling time difference. The data fusion module is used to process redundant data from the sensors, average the sensor sampled values ​​after median filtering to eliminate the influence of uneven pressure in the side passage cavity, and perform correlation analysis on temperature and humidity data to improve the accuracy of status judgment. The temperature compensation module is used to correct the interference of temperature on pressure measurement. Based on the ideal gas law, it calculates the correction coefficient in real time by combining temperature sensor data to avoid natural pressure deviation caused by the temperature rise during operation of the sealing component, and to ensure the accuracy of the adjustment reference. The pressure adaptive module is used to provide an auxiliary closed loop for pressure regulation. A micro flow meter is installed on the gas supply and extraction pipelines. The gas flow rate is monitored in real time by the micro flow meter on the gas supply / extraction pipeline. When the flow rate is greater than the set threshold, it is fed back to the PID controller to limit the valve opening and avoid pressure fluctuations caused by excessive gas supply / extraction. The segmented control module is used to achieve fine-grained pressure regulation. It dynamically switches PID parameters according to the pressure deviation, avoids overshoot through integral separation mechanism, and outputs a 4-20mA current signal to control the opening of the proportional regulating valve, ensuring pressure regulation accuracy of ±0.15kPa. The flow feedback module is used to provide an auxiliary closed loop for pressure regulation. It monitors the gas flow in real time through a micro flow meter on the gas supply / extraction pipeline. When the flow rate is greater than the set threshold, it feeds back to the PID controller to limit the valve opening and avoid pressure fluctuations caused by excessive gas supply / extraction. The data frame encoding module is used to compress and verify the format of the transmitted data, encapsulating pressure, temperature, humidity, and leakage status information into 16-byte binary frames, which reduces the amount of data by 60% compared to ASCII encoding, while ensuring transmission integrity through CRC16 verification. The wired backup module serves as a redundancy guarantee for wireless transmission, using shielded twisted-pair cable to connect to the factory system. When the wireless link error rate is >10... -5 If the signal strength is less than -90dBm, it will automatically switch to wired transmission within 50ms to ensure uninterrupted data transmission. The wireless transmission module is used as the main link for data transmission. Based on an industrial-grade LoRaWAN module, it operates in the 2.4GHz frequency band and the transmission rate is adjustable to 2Mbps. It is equipped with a shielding cover on the outer wall of the cylinder to resist interference and transmits the processed sensor data and control commands to the factory control system at high speed. The fault alarm module is used to monitor system anomalies in real time and trigger prompts. When a leak sensor is detected, pressure exceeds the upper limit, temperature exceeds the upper limit, or the transmission link is interrupted for more than 3 seconds, an audible and visual alarm is immediately activated. At the same time, the alarm information, including the fault type and location, is pushed to the factory control system through the transmission module.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, the side passage cavity and inner sleeve create a gas flow chamber after installation. Combined with a miniature pressure sensor, a significant increase in pressure inside the sleeve indicates a change in the mixer's pressure. Gas is then injected into the sleeve via a gas supply device, increasing the internal pressure and causing secondary compression between the stationary and moving rings. This enhances the sealing effect and prevents drug leakage from the mixer. The double-seal design further enhances the sealing effect. This design also adjusts the internal clamping force according to pressure changes within the mixer, preventing excessive wear of the seals due to high pressure and avoiding seal failure when pressure decreases. This significantly improves sealing reliability and reduces maintenance frequency.

[0016] 2. In this invention, by setting up micro-leakage sensors, humidity sensors, and temperature sensors, early warning of sealing failures can be provided, giving maintenance personnel sufficient time for repairs and avoiding production interruptions and quality accidents caused by leaks. By analyzing historical monitoring data, the remaining service life of the seals can also be predicted, optimizing maintenance plans and improving the level of intelligent equipment management. At the same time, during long-term use, when the stirring shaft rotates and the temperature of the contact area rises, the gas inside the assembly cylinder is circulated by the air extraction and supply equipment, thereby dissipating heat from the internal structure of the assembly cylinder, preventing excessive temperature and ensuring operational stability. Through the setting of the nano-coating, the erosion and wear of material particles on the sealing surface during stirring can be effectively resisted, reducing the coefficient of friction by 30%-50%, thereby reducing the wear rate of the seals and extending their service life. At the same time, the smooth coating surface can also reduce material adhesion, reduce the risk of material crystallization or solidification on the sealing surface, and ensure long-term stability of sealing performance. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of a stirring shaft sealing reinforcement component for a raw material mixer according to the present invention; Figure 2 This is a schematic diagram of the internal structure of the stirring shaft sealing reinforcement component of a raw material mixer of the present invention in connection with the stirring shaft; Figure 3 This is a three-dimensional structural diagram of the matching cylinder in the stirring shaft sealing reinforcement assembly of a raw material mixer according to the present invention; Figure 4 This is an exploded view of a stirring shaft sealing reinforcement assembly for a pharmaceutical raw material mixer according to the present invention. Figure 5 This is a schematic diagram of the dynamic ring in the stirring shaft sealing reinforcement assembly of a raw material mixer according to the present invention; Figure 6 This is a system diagram of a stirring shaft sealing reinforcement component for a pharmaceutical raw material mixer according to the present invention.

[0018] In the picture: 1. Assembly sleeve; 2. No. 1 cap; 3. No. 2 cap; 4. No. 1 connection port; 5. Connecting plate; 6. No. 2 connection port; 7. Miniature pressure sensor; 8. No. 3 connection port; 9. Stationary ring; 10. Moving ring; 11. Push ring; 12. Spring; 13. Spring seat; 14. Limiting groove; 15. Bearing; 16. Sealing packing; 17. Lip seal; 18. End groove; 19. Inner sleeve; 20. Side passage cavity; 21. Moving ring seal; 22. Micro-leakage sensor; 23. Humidity sensor; 24. Temperature sensor 25. Bottom slot; 26. Inner ring slot; 27. Data acquisition module; 28. Sensor module; 29. ​​Information conditioning module; 30. Synchronous sampling module; 31. Data fusion module; 32. Data processing and control module; 33. Temperature compensation module; 34. Pressure adaptive module; 35. Segmented control module; 36. Flow feedback module; 37. Data transmission module; 38. Data frame encoding module; 39. Wired backup module; 40. Wireless transmission module; 41. Execution alarm module; 42. Fault alarm module. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: Refer to Figures 1-5 As shown: A sealing and strengthening assembly for the stirring shaft of a raw material mixer includes a mounting cylinder 1. An inner sleeve 19 is fixedly connected inside the mounting cylinder 1, and the center line of the inner sleeve 19 coincides with that of the end groove 18. End grooves 18 are formed at both the upper and lower ends of the mounting cylinder 1. Side passage cavities 20 are formed on both sides of the middle portion of the mounting cylinder 1, with their two ends communicating with the two end grooves 18 respectively. Connecting discs 5 are fixedly connected to both the upper and lower ends of the mounting cylinder 1. A first-type sealing cap 2 is provided at the upper end of the mounting cylinder 1, and two... One end of the first cover 2 and the second cover 3 are respectively fixedly connected to two connecting discs 5 by bolts. The outer surface of the first cover 2 is fixedly connected to the first connection port 4, which is used to connect the electric control valve. The two electric control valves are used to connect the gas supply equipment and the gas extraction equipment respectively. The second connection port 6 is fixedly connected to the upper middle part of the outer surface of the mounting cylinder 1. The miniature pressure sensor 7 is installed inside the second connection port 6. The mounting cylinder 1 is used to install in the middle of the end cover of the mixer, and the second cover 3 is located below the end cover.

[0021] In this invention, the side passage cavity 20 and the inner sleeve 19 form a gas flow cavity after installation. Combined with the miniature pressure sensor 7, when a significant increase in pressure is detected inside the sleeve 1, it indicates a change in pressure within the mixer. Gas is then injected into the sleeve 1 via a gas supply device, increasing the internal gas pressure. This causes secondary compression between the stationary ring 9 and the moving ring 10, enhancing the sealing effect and preventing drug leakage from the mixer. The double-sealed design further enhances the sealing effect. This design also adjusts the internal clamping force according to pressure changes within the mixer, preventing excessive wear of the seals due to high pressure and avoiding seal failure when pressure decreases. This significantly improves sealing reliability and reduces maintenance frequency.

[0022] Example 2: Figures 1-5 As shown, bearings 15 are installed at the top and bottom of the center of the inner sleeve 19. A sealing packing 16 is installed inside the inner sleeve 19 between the two bearings 15. Lip seals 17 are installed at both ends of the inner sleeve 19. A third connection port 8 is fixedly connected to the outer surface of the second cover 3. There are three third connection ports 8. A micro-leakage sensor 22, a humidity sensor 23, and a temperature sensor 24 are respectively installed inside the three third connection ports 8, with the detection ends facing the stirring shaft. Mechanical seal mechanisms are installed at both ends of the inner sleeve 19. The mechanical seal mechanism includes a stationary ring 9, a moving ring 10, a push ring 11, a spring 12, and a spring seat 13. A slot is opened at one end of the spring seat 13, which engages with the end of the inner sleeve 19. A limiting groove 14 is opened at the end of the spring seat 13 and the push ring 11 that are close to each other. Both ends of the spring 12 engage with two limiting grooves 14 respectively. The lower end of the moving ring 10 is provided with a bottom groove 25, and one end of the push ring 11 is rotatably connected to the bottom groove 25. The inner ring surface of the moving ring 10 is provided with an inner ring groove 26, and a moving ring sealing ring 21 is installed inside the inner ring groove 26. The moving ring 10 is rotatably connected to the stationary ring 9. The two stationary rings 9 are respectively installed inside one end of the first cover 2 and the second cover 3. The contact surface between the moving ring 10 and the stationary ring 9 is provided with a nano-coating with a thickness of 0.5-2μm. The micro-leakage sensor 22, humidity sensor 23 and temperature sensor 24 are connected to a small data acquisition module through a flexible printed circuit board. The data acquisition module then transmits the data to the factory's control system through a wireless communication module. When a micro-leakage occurs on the sealing surface, the leaked material will cause changes in temperature and humidity, and at the same time trigger the micro-leakage sensor. The system will issue an alarm in time to facilitate timely maintenance and repair and reduce losses.

[0023] The specific application process of the nano-coating includes the following steps: Step 1: Depending on the materials of the stationary ring 9 and the moving ring 10, clean the stationary ring 9 and the moving ring 10 to remove surface oil, oxide layer, machining residue, etc. For metal substrates, use ultrasonic cleaning with organic solvents to remove surface cutting oil, fingerprints, and other organic contaminants. For ceramic substrates, use alkaline solution for ultrasonic cleaning to dissolve inorganic impurities on the surface. Finally, rinse with deionized water until neutral. The oxide layer on the surface of the metal substrate will hinder coating adhesion and needs to be removed by plasma etching or acid washing. Microcracks or residual abrasives on the surface of the ceramic substrate are rinsed with high-pressure water jet to avoid "voids" during subsequent coating deposition. Step 2: Increase the specific surface area of ​​the substrate through controllable roughening, utilizing the "mechanical anchoring effect" to enhance the adhesion between the coating and the substrate. Simultaneously, avoid excessive roughening that could compromise the flatness of the sealing surface. For metal substrates: use magnetron sputtering etching or laser microtexturing to form a "micron-level pit array" with a diameter of 5-10 μm and a depth of 2-3 μm on the surface, with a pit spacing of 20-30 μm. This increases the contact area without affecting the flatness of the sealing surface. For ceramic substrates: use sandblasting to roughen the surface, forming a micro-uneven structure with Ra=0.1-0.3 μm. After roughening, use plasma polishing to smooth out sharp peaks and avoid stress concentration. Step 3: Transition zone fabrication, metal substrate: First deposit a Cr transition layer on the stainless steel surface. The CTE of Cr is close to that of stainless steel and has strong compatibility with subsequent nano-coatings, which can reduce interfacial thermal stress.

[0024] Ceramic substrate → Nano-coating: A SiO2 transition layer is first deposited on the SiC surface. SiO2 has high chemical affinity with SiC and can form a gradient connection with the nano-Al2O3 coating. Step 4: Deposit a nano-TiN coating on the moving ring 10 using magnetron sputtering: Place the pretreated stainless steel moving ring into a vacuum chamber, introduce Ar and N2 gases, and use a Ti target as the target material; apply an RF power supply to generate plasma on the Ti target under magnetic field confinement. Ions bombard the target surface, causing Ti atoms to be sputtered onto the moving ring surface and react with N2 to form TiN; the ion energy is controlled by pulse bias to promote TiN grain refinement, and multiple targets are used for alternating sputtering to form a "Cr-TiN gradient coating" to further relieve stress. The DLC coating is deposited by arc ion plating on a static ring 9: the graphite substrate needs to be ion cleaned first to remove loose graphite particles on the surface; using a graphite target as the cathode, an electric current is introduced... Gas, an electric arc voltage is applied, causing the graphite target to evaporate and ionize. Ions, and The decomposed C / H ions combine on the substrate surface to form a diamond-like carbon (DLC) coating; Si doping is introduced during the deposition process to form a "Si-DLC nanocomposite coating", which reduces the internal stress of the coating and prevents peeling.

[0025] In this invention, the inclusion of a micro-leakage sensor 22, a humidity sensor 23, and a temperature sensor 24 provides early warning of sealing failures, giving maintenance personnel sufficient time for repairs and preventing production interruptions and quality accidents caused by leaks. Analysis of historical monitoring data also allows for prediction of the remaining service life of the seals, optimizing maintenance plans and improving the intelligence level of equipment management. Furthermore, during prolonged use, the rotation of the stirring shaft raises the temperature of the contact area. Combined with the extraction and supply equipment, this allows gas to flow within the assembly cylinder 1, dissipating heat from the internal structure and preventing overheating, thus ensuring operational stability. The nano-coating effectively resists the erosion and wear of the sealing surface by material particles during stirring, reducing the friction coefficient by 30%-50%, thereby reducing the wear rate of the seals and extending their service life. Simultaneously, the smooth coating surface reduces material adhesion, lowering the risk of material crystallization or solidification on the sealing surface and ensuring long-term stability of the sealing performance.

[0026] Example 3: According to Figure 6 As shown, it also includes a data processing system, which includes a data acquisition module 27, a data processing and control module 32, a data transmission module 37, and an execution alarm module 41. The data acquisition module 27 includes a sensor module 28, an information conditioning module 29, a synchronous sampling module 30, and a data fusion module 31. The data processing and control module 32 includes a temperature compensation module 33, a pressure adaptive module 34, a segmented control module 35, and a flow feedback module 36. The data transmission module 37 includes a data frame encoding module 38, a wired backup module 39, a wireless transmission module 40, and a factory control system. The execution alarm module 41 includes a fault alarm module 42 and an electric valve. The sensor module 28 consists of a micro-leakage sensor 22, a humidity sensor 23, a temperature sensor 24, and a miniature pressure sensor 7, which are used to collect sealing parameters and obtain raw data on pressure, temperature, humidity, and leakage status. The information conditioning module 29 is used to process the raw signal output by the sensor, convert the 4-20mA analog signal of the miniature pressure sensor 7 into a 0-3.3V standard signal, use an RC low-pass filter circuit to eliminate electromagnetic noise, and perform linearization calibration on the PT100 signal of 24 to ensure the stability and reliability of the data signal. The synchronous sampling module 30 is used to control the sampling timing of the sensor. Based on the timer function of STM32H743IGH6, the sampling frequency of the sensor is unified to 50Hz, and the sampling frequency of the miniature pressure sensor 7 is increased to 100Hz. The signal is received synchronously through the parallel interface to avoid data deviation caused by sampling time difference. The data fusion module 31 is used to process redundant data from the sensors, average the sampled values ​​of the sensors after median filtering, eliminate the influence of uneven pressure in the side passage cavity 20, and perform correlation analysis on temperature and humidity data to improve the accuracy of status judgment. The temperature compensation module 33 is used to correct the interference of temperature on pressure measurement. Based on the ideal gas law, it calculates the correction coefficient in real time by combining the data of temperature sensor 24 to avoid the natural pressure deviation caused by the temperature rise during operation of the sealing component and to ensure the accuracy of the adjustment reference. The pressure adaptive module 34 is used to provide an auxiliary closed loop for pressure regulation. A micro flow meter is installed on the gas supply and extraction pipelines. The gas flow is monitored in real time by the micro flow meter on the gas supply / extraction pipeline. When the flow rate is greater than the set threshold, it is fed back to the PID controller to limit the valve opening and avoid pressure fluctuations caused by excessive gas supply / extraction. The segmented control module 35 is used to achieve fine-grained pressure regulation. It dynamically switches PID parameters according to pressure deviation, avoids overshoot through integral separation mechanism, and outputs a 4-20mA current signal to control the opening of the proportional regulating valve to ensure pressure regulation accuracy of ±0.15kPa. The flow feedback module 36 is used to provide an auxiliary closed loop for pressure regulation. It monitors the gas flow in real time through a small flow meter on the gas supply / extraction pipeline. When the flow rate is greater than the set threshold, it feeds back to the PID controller to limit the valve opening and avoid pressure fluctuations caused by excessive gas supply / extraction. The data frame encoding module 38 is used to compress and verify the format of the transmitted data, encapsulating pressure, temperature, humidity and leakage status information into 16-byte binary frames, which reduces the amount of data by 60% compared to ASCII encoding, while ensuring transmission integrity through CRC16 verification. The wired backup module 39 serves as a redundancy guarantee for wireless transmission. It uses shielded twisted-pair cable to connect to the factory system. When the wireless link bit error rate is >10... -5 If the signal strength is less than -90dBm, it will automatically switch to wired transmission within 50ms to ensure uninterrupted data transmission. The wireless transmission module 40 is used as the main link for data transmission. Based on an industrial-grade LoRaWAN module, it operates in the 2.4GHz frequency band and the transmission rate can be adjusted to 2Mbps. It is equipped with a shielding cover on the outer wall of the sleeve 1 to resist interference and transmits the processed sensor data and control commands to the factory control system at high speed. The fault alarm module 42 is used to monitor system anomalies in real time and trigger prompts. When a leak sensor is detected, pressure exceeds the upper limit, temperature exceeds the upper limit, or transmission link is interrupted for more than 3 seconds, an audible and visual alarm is immediately activated. At the same time, the alarm information, including the fault type and location, is pushed to the factory control system through the transmission module.

[0027] The usage and working principle of this device are as follows: During use, the pressure value inside the assembly cylinder 1 is detected by the miniature pressure sensor 7, and the temperature at the stationary ring 9 below the assembly cylinder 1 is detected by the temperature sensor 24. When the pressure value inside the assembly cylinder 1 rises, it means that the pressure inside the mixer has increased. When the micro-leakage sensor 22 and the humidity sensor 23 detect a leak inside the assembly cylinder 1, the gas supply equipment fills the assembly cylinder 1 with gas, which increases the pressure inside the assembly cylinder 1 to ensure the sealing effect. When the temperature sensor 24 detects a temperature rise, gas flows out and enters simultaneously from the two No. 1 connection ports 4 to replace the gas inside the No. 1 connection ports 4, thereby dissipating heat.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sealing reinforcement component for the stirring shaft of a raw material mixer, characterized in that, The assembly includes a mounting sleeve (1), an inner sleeve (19) fixedly connected inside the mounting sleeve (1), the center line of the inner sleeve (19) coinciding with the center line of the end groove (18), end grooves (18) being opened at both the upper and lower ends of the mounting sleeve (1), side passage cavities (20) being opened on both sides of the middle part of the mounting sleeve (1), the two ends of the side passage cavities (20) respectively communicating with the two end grooves (18), connecting plates (5) being fixedly connected at both the upper and lower ends of the mounting sleeve (1), and a first-numbered cap (2) being provided at the upper end of the mounting sleeve (1). The lower end of the matching cylinder (1) is equipped with a second cover (3). One end of the second cover (3) and the first cover (2) are respectively fixedly connected to two connecting plates (5) by bolts. The outer surface of the first cover (2) is fixedly connected to a first connection port (4). The first connection port (4) is used to connect an electric control valve. The two electric control valves are respectively used to connect an air supply device and an air extraction device. The middle upper part of the outer surface of the matching cylinder (1) is fixedly connected to a second connection port (6). A miniature pressure sensor (7) is installed inside the second connection port (6).

2. The raw material mixer stirring shaft sealing reinforcement assembly according to claim 1, characterized in that: Bearings (15) are provided at the top and bottom of the center of the inner sleeve (19), and sealing filler (16) is provided inside the inner sleeve (19) and between the two bearings (15).

3. The raw material mixer stirring shaft sealing reinforcement assembly according to claim 2, characterized in that: Both ends of the inner sleeve (19) are equipped with lip seals (17). The outer surface of the second cover (3) is fixedly connected with a third connection port (8). There are three third connection ports (8). The three third connection ports (8) are respectively equipped with a micro-leakage sensor (22), a humidity sensor (23) and a temperature sensor (24), and the detection end faces the stirring shaft.

4. The raw material mixer stirring shaft sealing reinforcement assembly according to claim 3, characterized in that: Both ends of the inner sleeve (19) are provided with mechanical sealing mechanisms, which include a stationary ring (9), a moving ring (10), a push ring (11), a spring (12), and a spring seat (13).

5. The raw material mixer stirring shaft sealing reinforcement assembly according to claim 4, characterized in that: One end of the spring seat (13) is provided with a slot, which is engaged with the end of the inner sleeve (19). The ends of the spring seat (13) and the push ring (11) that are close to each other are provided with limiting slots (14), and the two ends of the spring (12) are engaged with the two limiting slots (14) respectively.

6. The enhanced sealing assembly for the stirring shaft of the raw material mixer according to claim 5, characterized in that: The lower end of the moving ring (10) is provided with a bottom slot (25), and one end of the push ring (11) is rotatably connected to the bottom slot (25).

7. The enhanced sealing assembly for the stirring shaft of the raw material mixer according to claim 6, characterized in that: The inner ring surface of the moving ring (10) is provided with an inner ring groove (26), and a moving ring sealing ring (21) is installed inside the inner ring groove (26). The moving ring (10) is rotatably connected to the stationary ring (9), and the two stationary rings (9) are respectively installed at one end inside the first cover (2) and the second cover (3).

8. The enhanced sealing assembly for the stirring shaft of the raw material mixer according to claim 7, characterized in that: The contact surface between the moving ring (10) and the stationary ring (9) is provided with a nano-coating with a thickness of 0.5-2μm.

9. The enhanced sealing assembly for the stirring shaft of the raw material mixer according to claim 8, characterized in that: It also includes a data processing system, which includes a data acquisition module (27), a data processing and control module (32), a data transmission module (37), and an execution alarm module (41). The data acquisition module (27) includes a sensor module (28), an information conditioning module (29), a synchronous sampling module (30), and a data fusion module (31). The data processing and control module (32) includes a temperature compensation module (33), a pressure adaptive module (34), a segmented control module (35), and a flow feedback module (36). The data transmission module (37) includes a data frame encoding module (38), a wired backup module (39), a wireless transmission module (40), and a factory control system. The execution alarm module (41) includes a fault alarm module (42) and an electric valve.

10. The raw material mixer stirring shaft sealing reinforcement assembly according to claim 9, characterized in that: The sensor module (28) consists of a micro-leakage sensor (22), a humidity sensor (23), a temperature sensor (24) and a miniature pressure sensor (7), and is used to collect sealing parameters and obtain raw data on pressure, temperature, humidity and leakage status. The information conditioning module (29) is used to process the raw signal output by the sensor, convert the 4-20mA analog signal of the miniature pressure sensor (7) into a 0-3.3V standard signal, use an RC low-pass filter circuit to eliminate electromagnetic noise, and perform linearization calibration on the PT100 signal of the temperature sensor (24). The synchronous sampling module (30) is used to control the sampling timing of the sensor. Based on the timer function of STM32H743IGH6, the sampling frequency of the sensor is unified to 50Hz, the micro pressure sensor (7) is increased to 100Hz, and the signal is received synchronously through the parallel interface. The data fusion module (31) is used to process redundant data from the sensor, average the sampled values ​​of the sensor after median filtering, and perform correlation analysis on the temperature and humidity data. The temperature compensation module (33) is used to correct the interference of temperature on pressure measurement. Based on the ideal gas law, the correction coefficient is calculated in real time by combining the data from the temperature sensor (24). The pressure adaptive module (34) is used to provide an auxiliary closed loop for pressure regulation. A micro flow meter is installed on the gas supply and extraction pipelines. The gas flow rate is monitored in real time by the micro flow meter on the gas supply / extraction pipeline. When the flow rate is greater than the set threshold, it is fed back to the PID controller to limit the valve opening. The segmented control module (35) is used to achieve fine adjustment of pressure, dynamically switch PID parameters according to pressure deviation, avoid overshoot through integral separation mechanism, and output 4-20mA current signal to control the opening of proportional regulating valve. The flow feedback module (36) is used to provide an auxiliary closed loop for pressure regulation. It monitors the gas flow in real time through a small flow meter on the gas supply / extraction pipeline. When the flow rate is greater than the set threshold, it feeds back to the PID controller to limit the valve opening. The data frame encoding module (38) is used to compress and verify the format of the transmitted data, encapsulate the pressure, temperature, humidity and leakage status information into a 16-byte binary frame, and verify it through CRC16. The wired backup module (39) is used as a redundancy guarantee for wireless transmission. It uses shielded twisted-pair cable to connect to the factory system. When the wireless link bit error rate is >10... -5 If the signal strength is less than -90dBm, it will automatically switch to wired transmission within 50ms. The wireless transmission module (40) is used as the main link for data transmission. Based on the industrial-grade LoRaWAN module, it operates in the 2.4GHz band and the transmission rate can be adjusted to 2Mbps. It is equipped with a shielding cover on the outer wall of the sleeve (1) to resist interference and transmit the processed sensor data and control commands to the factory control system at high speed. The fault alarm module (42) is used to monitor system abnormalities in real time and trigger prompts. When a leak sensor is detected, the pressure exceeds the upper limit, the temperature exceeds the upper limit, or the transmission link is interrupted for more than 3 seconds, an audible and visual alarm is immediately activated. At the same time, the alarm information, including the fault type and location, is pushed to the factory control system through the transmission module.

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