Raw material medicine mixing machine stirring shaft seal reinforcing assembly

Abstract

The application discloses a raw medicine mixing machine stirring shaft sealing reinforcing assembly, which comprises an assembling sleeve, and an inner sleeve is fixedly connected to the inside of the assembling sleeve. The inside of the assembling sleeve forms a gas flow cavity after installation, and a micro pressure sensor is matched. When the pressure increase in the inside of the assembling sleeve is detected to be large, the pressure in the mixing machine changes. The assembling sleeve is injected with gas by a gas supply device, the gas pressure in the inside of the assembling sleeve is increased, the static ring and the dynamic ring are secondarily extruded, the sealing effect is increased, the medicine in the mixing machine is prevented from flowing out, and the upper and lower double sealing type design is adopted, the sealing effect is further increased, the inside pressure is adjusted according to the pressure change in the mixing machine, the sealing part is prevented from being excessively abraded due to the excessively high pressure, the sealing failure is avoided when the pressure is reduced, the sealing reliability is remarkably improved, and the maintenance frequency is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medicine production, in particular to a raw medicine mixing machine stirring shaft sealing reinforcement assembly. BACKGROUND

[0002] In the production of medicine, according to the different medicines, the raw materials need to be mixed by a mixing machine to make the medicine, and the medicine mixing machine is a machine mainly used for uniform mixing of different proportions of dry or wet powders in the laboratory. It is made of stainless steel material, has corrosion resistance, and the transmission mechanism adopts worm gear direct transmission to ensure stable operation.

[0003] In the prior art, during the production of medicine, the mixing machine needs to be sealed between the stirring shaft and the stirring tank to prevent moisture and dust and other impurities from entering the outside, and the sealing between the mixing machine and the stirring shaft is relatively simple, and the lip seal is usually used in cooperation with the cover for sealing. In use, the pressure cannot be adjusted, and when the internal pressure of the mixing machine is too large, there will be a gap between the lip seal and the shaft part, the sealing effect cannot be adjusted, and the sealing effect is limited. SUMMARY

[0004] The present application aims to provide a raw medicine mixing machine stirring shaft sealing reinforcement assembly to solve the problem of the mixing machine in use, which needs to be sealed between the stirring shaft and the stirring tank to prevent moisture and dust and other impurities from entering the outside, and the sealing between the mixing machine and the stirring shaft is relatively simple, and the lip seal is usually used in cooperation with the cover for sealing. In use, the pressure cannot be adjusted, and when the internal pressure of the mixing machine is too large, there will be a gap between the lip seal and the shaft part, the sealing effect cannot be adjusted, and the sealing effect is limited.

[0005] In order to achieve the above object, the present application provides the following technical scheme: a raw material mixing machine stirring shaft sealing strengthening assembly, which comprises an assembly sleeve, an inner sleeve is fixedly connected inside the assembly sleeve, the inner sleeve is coincident with the center line of an end slot, end slots are arranged at the upper and lower ends of the inside of the assembly sleeve, side cavities are arranged at the two sides of the middle part of the inside of the assembly sleeve, the two ends of the side cavities are communicated with the two end slots respectively, connecting discs are fixedly connected to the upper and lower ends of the assembly sleeve, a first cover is arranged at the upper end of the assembly sleeve, a second cover is arranged at the lower end of the assembly sleeve, the two ends of the first cover and the second cover are fixedly connected with the two connecting discs through bolts, two first connecting ports are fixedly connected to the outer surface of the first cover, the two first connecting ports are used for connecting electric control valves, the two electric control valves are used for connecting gas supply equipment and air extraction equipment respectively, a second connecting port is fixedly communicated with the middle part of the outer surface of the assembly sleeve, a micro pressure sensor is arranged in the second connecting port, the assembly sleeve is arranged in the middle part of the end cover of the mixing machine, and the second cover is arranged below the end cover.

[0006] Preferably, bearings are arranged at the upper and lower parts of the middle part of the inside of the inner sleeve, and sealing fillers are arranged between the two bearings in the inside of the inner sleeve.

[0007] Preferably, lip-shaped sealing rings are arranged at the two ends of the inside of the inner sleeve, a third connecting port is fixedly connected to the outer surface of the second cover, the number of the third connecting port is three, micro leakage sensors, humidity sensors and temperature sensors are arranged in the inside of the three third connecting ports respectively, and the detection ends of the sensors are directed to the stirring shaft.

[0008] Preferably, mechanical sealing mechanisms are arranged at the two ends of the inner sleeve, the mechanical sealing mechanisms comprise static rings, dynamic rings, push rings, springs and spring seats.

[0009] Preferably, a notch is arranged at one end of the spring seat, the notch is clamped with the end of the inner sleeve, the end of the spring seat, which is close to the push ring, is provided with a limiting clamping groove, and the two ends of the spring are clamped with the two limiting clamping grooves respectively.

[0010] Preferably, a bottom clamping groove is arranged at the lower end of the dynamic ring, and one end of the push ring is rotationally connected with the bottom clamping groove.

[0011] Preferably, an inner ring groove is arranged on the inner ring surface of the dynamic ring, a dynamic ring sealing ring is arranged in the inside of the inner ring groove, the dynamic ring is rotationally connected with the static ring, and the two static rings are arranged at one end in the inside of the first cover and the second cover respectively.

[0012] Preferably, a nano coating is arranged on the contact surface between the dynamic ring and the static ring, and the thickness of the nano coating is 0.5-2 mu m.

[0013] Preferably, it also includes a data processing system, which includes 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, and the execution alarm module includes a fault alarm module and an electric valve.

[0014] Preferably, the sensor module is composed of a micro-leakage sensor, a humidity sensor, a temperature sensor and a micro-pressure sensor, which is used to collect sealing parameters and obtain original data of pressure, temperature and humidity and leakage state.

[0015] The information conditioning module is used to process the original signals output by the sensors, convert the 4-20mA analog signal of the micro-pressure sensor into a 0-3.3v standard signal, eliminate electromagnetic noise by using an RC low-pass filter circuit, linearize the PT100 signal of the temperature sensor, and ensure the stability and reliability of the data signal.

[0016] The synchronous sampling module is used to control the sampling timing of the sensors, and the sampling frequencies of the micro-leakage sensor, the humidity sensor and the temperature sensor are unified to 50Hz based on the timer function of the STM32H743IGH6, and the sampling frequency of the micro-pressure sensor is increased to 100Hz, and the signals are received synchronously through a parallel interface to avoid data deviation caused by sampling time difference.

[0017] The data fusion module is used to process the redundant data of the sensors, take the average of the median filtered sampling values of the sensors to eliminate the influence of uneven pressure in the side-through cavity, and perform correlation analysis on the temperature and humidity data to improve the accuracy of state judgment.

[0018] The temperature compensation module is used to correct the interference of temperature on pressure measurement, and real-time correction coefficient is calculated based on the ideal gas state equation combined with the temperature sensor data to avoid natural pressure deviation caused by temperature rise during operation of the sealing assembly, and to ensure the accuracy of the adjustment reference.

[0019] The pressure adaptive module is used to provide auxiliary closed loop for pressure regulation, and a micro-flow meter is installed on the gas supply and exhaust pipeline, the gas flow is monitored in real time through the micro-flow meter on the gas supply / exhaust pipeline, when the flow is greater than the set threshold, the feedback is sent to the PID controller to limit the valve opening, and the pressure fluctuation caused by excessive gas supply / exhaust is avoided.

[0020] The segmented control module is used for realizing fine adjustment of pressure, dynamically switching PID parameters according to pressure deviation, avoiding overshoot through integral separation mechanism, outputting 4-20mA current signal to control opening of proportional regulating valve, and ensuring pressure regulation precision ±0.15kPa.

[0021] The flow feedback module is used for providing auxiliary closed loop for pressure regulation, monitoring gas flow in real time through a small flow meter on a gas supply / exhaust pipeline, feeding back to a PID controller to limit valve opening when flow > set threshold, and avoiding pressure fluctuation caused by excessive gas supply / exhaust.

[0022] The data frame encoding module is used for format compression and verification of transmission data, encapsulating pressure, temperature, humidity and leakage state information into a 16-byte binary frame, reducing data amount by 60% compared with ASCII encoding, and ensuring transmission integrity through CRC16 verification.

[0023] The wired backup module is used for redundancy guarantee of wireless transmission, adopts shielded twisted pair to connect a factory system, and automatically switches to wired transmission within 50ms when wireless link error rate > 10 -5 or signal strength < -90dBm, ensuring uninterrupted data transmission.

[0024] The wireless transmission module is used as a main link for data transmission, is based on an industrial LoRaWAN module, works in a 2.4GHz frequency band, and has a transmission rate adjustable to 2Mbps, and is provided with a shielding cover mounted on the outer wall of a sleeve to resist interference, and is used for high-speed transmission of processed sensor data and control instructions to a factory control system.

[0025] The fault alarm module is used for real-time monitoring of system abnormalities and triggering of prompts, and is used for starting an audible and visual alarm immediately when a leakage sensor trigger, pressure over upper limit, temperature over upper limit or transmission link interruption > 3s is detected, and is used for pushing alarm information to a factory control system through a transmission module, including fault type and positioning.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] 1、The present application, through the side cavity and the setting of the built-in sleeve, after installation, its inside will form a gas flow cavity, cooperate with the micro pressure sensor, when detecting the pressure increase in the assembly sleeve is larger, the pressure in the mixer appears change, by the gas injection equipment into the assembly sleeve, the gas pressure in the assembly sleeve increases, the static ring and the dynamic ring are extruded twice, thereby increasing the sealing effect, avoiding the drug flow out of the mixer, at the same time, the upper and lower double sealing design is adopted, further increasing the sealing effect, at the same time, the design can adjust the internal compression force according to the different pressure changes in the mixer, which can prevent the sealing part from being excessively worn due to excessive pressure, and can also avoid sealing failure when the pressure decreases, significantly improve the sealing reliability and reduce the maintenance frequency.

[0028] 2、The present application, through the setting of the micro leakage sensor, humidity sensor and temperature sensor, the sealing failure can be early warned, so as to give maintenance personnel sufficient maintenance time, avoid production interruption and quality accidents caused by leakage, through analysis of historical monitoring data, the remaining service life of the sealing part can also be predicted, the maintenance plan is optimized, the intelligent level of equipment management is improved, at the same time, when the stirring shaft rotates for a long time, the temperature of the contact area rises, cooperate with the air extraction equipment and the air supply equipment, the gas in the assembly sleeve flows, thereby cooling the structure inside the assembly sleeve, avoiding high temperature, ensuring the stability of use, through the setting of the nano coating, the abrasion and wear of the sealing surface by the material particles in the stirring process can be effectively resisted, the friction coefficient is reduced by 30%-50%, thereby reducing the wear rate of the sealing part and prolonging the service life, at the same time, the smooth coating surface can also reduce the adhesion of the material, reduce the risk of material crystallization or solidification on the sealing surface, and ensure the long-term stability of the sealing performance. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a stereoscopic structure schematic view of a raw material medicine mixer stirring shaft sealing strengthening assembly of the present application;

[0030] Figure 2 It is an internal structure schematic view of a raw material medicine mixer stirring shaft sealing strengthening assembly and a stirring shaft connection state of the present application;

[0031] Figure 3 It is a stereoscopic structure schematic view of an assembly sleeve in a raw material medicine mixer stirring shaft sealing strengthening assembly of the present application;

[0032] Figure 4 It is an explosion view of a raw material medicine mixer stirring shaft sealing strengthening assembly of the present application;

[0033] Figure 5 It is a structure schematic view of a dynamic ring in a raw material medicine mixer stirring shaft sealing strengthening assembly of the present application;

[0034] Figure 6 Figure 1 is a system diagram of a raw material mixing machine stirring shaft sealing reinforcement assembly of the present application.

[0035] In the figure:

[0036] 1, assembly sleeve; 2, No. 1 cover; 3, No. 2 cover; 4, No. 1 connecting port; 5, connecting disc; 6, No. 2 connecting port; 7, micro pressure sensor; 8, No. 3 connecting port; 9, static ring; 10, dynamic ring; 11, push ring; 12, spring; 13, spring seat; 14, limiting slot; 15, bearing; 16, sealing packing; 17, lip seal ring; 18, end slot; 19, built-in sleeve; 20, side through cavity; 21, dynamic ring seal ring; 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, execute alarm module; 42, fault alarm module. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0038] Embodiment one: refer to Figures 1-5The application discloses a raw medicine mixer stirring shaft sealing reinforcing assembly, which comprises an assembling sleeve 1, an inner sleeve 19 is fixedly connected to the inside of the assembling sleeve 1, the inner sleeve 19 is coincident with the center line of an end groove 18, the end groove 18 is arranged at the upper end and the lower end of the inside of the assembling sleeve 1, side cavities 20 are arranged at the two sides of the middle part of the inside of the assembling sleeve 1, the two ends of the side cavities 20 are communicated with the two end grooves 18 respectively, the upper end and the lower end of the assembling sleeve 1 are fixedly connected with connecting discs 5, a first cover 2 is arranged at the upper end of the assembling sleeve 1, a second cover 3 is arranged at the lower end of the assembling sleeve 1, the one end of the first cover 2 and the second cover 3 is fixedly connected with the two connecting discs 5 through bolts, the outer surface of the first cover 2 is fixedly connected with two first connecting ports 4, the two first connecting ports 4 are used for connecting electric control valves, the two electric control valves are used for connecting gas supply equipment and gas extraction equipment, a second connecting port 6 is fixedly connected to the upper middle part of the outer surface of the assembling sleeve 1, a micro pressure sensor 7 is arranged in the second connecting port 6, and the assembling sleeve 1 is arranged in the middle part of a mixer end cover, and the second cover 3 is arranged below the end cover.

[0039] In the application, the side cavities 20 and the inner sleeve 19 are arranged, so that a gas flow cavity is formed in the inside of the assembling sleeve 1 after installation, and the micro pressure sensor 7 is arranged, so that when the pressure in the inside of the assembling sleeve 1 is greatly increased, it is considered that the pressure in the mixer is changed, the gas in the inside of the assembling sleeve 1 is injected by the gas supply equipment, the gas pressure in the inside of the assembling sleeve 1 is increased, the static ring 9 and the dynamic ring 10 are secondarily extruded, the sealing effect is improved, the medicine in the mixer is prevented from flowing out, the upper and lower double sealing design is adopted, the sealing effect is further improved, the pressure pressing force in the inside can be adjusted according to the different pressure changes in the mixer, the sealing element is prevented from being excessively abraded due to the excessively high pressure, the sealing failure is avoided when the pressure is reduced, the sealing reliability is obviously improved, and the maintenance frequency is reduced.

[0040] Embodiment two Figures 1-5As shown, the middle of the inner sleeve 19 is provided with bearings 15 on the upper and lower sides, the inner sleeve 19 is provided with a sealing filler 16 between the two bearings 15, the two ends of the inner sleeve 19 are provided with lip-shaped sealing rings 17, the outer surface of the second cover 3 is fixedly connected with three third connecting ports 8, the inner part of the three third connecting ports 8 is respectively provided with a trace leakage sensor 22, a humidity sensor 23 and a temperature sensor 24, and the detection end faces the stirring shaft, the two ends of the inner sleeve 19 are provided with mechanical seal mechanisms, the mechanical seal mechanisms comprise static rings 9, dynamic rings 10, push rings 11, springs 12 and spring seats 13, one end of the spring seat 13 is provided with a notch, the notch is connected with the end of the inner sleeve 19, the end of the spring seat 13 and the end of the push ring 11 are provided with limiting grooves 14, the two ends of the spring 12 are respectively connected with the two limiting grooves 14, the lower end of the dynamic ring 10 is provided with a bottom groove 25, one end of the push ring 11 is rotatably connected with the bottom groove 25, the inner ring surface of the dynamic ring 10 is provided with an inner ring groove 26, the inner ring groove 26 is provided with a dynamic ring sealing ring 21, the dynamic ring 10 is rotatably connected with the static ring 9, the two static rings 9 are respectively arranged in one end of the first cover 2 and the second cover 3, the contact surface between the dynamic ring 10 and the static ring 9 is provided with a nano coating with a thickness of 0.5-2 microns, the trace leakage sensor 22, the humidity sensor 23 and the temperature sensor 24 are connected to a small data acquisition module through a flexible printed circuit board, the data acquisition module transmits data to the control system of the factory through a wireless communication module, when the sealing surface appears trace leakage, the leaked material will cause temperature and humidity changes, and trigger the trace leakage sensor at the same time, the system timely issues an alarm to facilitate timely maintenance and repair, and reduce losses.

[0041] The specific attachment process of the nano coating comprises the following steps:

[0042] Step one, according to the different materials of the static ring 9 and the dynamic ring 10, the static ring 9 and the dynamic ring 10 are cleaned to remove surface oil stains, oxidation layers, processing residual debris and the like, for metal matrix, ultrasonic wave + organic solvent cleaning is adopted to remove surface cutting oil, fingerprints and other organic pollutants; for ceramic matrix, alkaline solution ultrasonic cleaning can be supplemented to dissolve surface inorganic impurities, and finally deionized water is used to rinse to neutral, the oxidation layer on the surface of the metal matrix will hinder the coating combination, and needs to be removed by plasma etching or pickling; the microcracks or residual abrasives on the surface of the ceramic matrix are washed by high-pressure water jet to avoid "hollow" during subsequent coating deposition;

[0043] Step two, increase the specific surface area of the substrate surface by controllable roughening, use the "mechanical anchoring effect" to improve the adhesion of the coating and the substrate, and at the same time avoid excessive roughening to destroy the flatness of the sealing surface. Metal substrate: adopt magnetron sputtering etching or laser micro-texturing to form "micron pit array" with diameter of 5-10 μm and depth of 2-3 μm on the surface, pit spacing is 20-30 μm, which not only increases the contact area, but also does not affect the flatness of the sealing surface. Ceramic substrate: adopt sand blasting roughening to form micro concave-convex structure with Ra=0.1-0.3 μm on the surface, and then use plasma polishing to trim the sharp peaks to avoid stress concentration;

[0044] Step three: transition zone making, metal substrate: first deposit a Cr transition layer on the surface of stainless steel, the CTE of Cr is close to that of stainless steel, and it has strong compatibility with the subsequent nano coating, which can reduce the interfacial thermal stress.

[0045] Ceramic substrate→nano coating: first deposit a SiO2 transition layer on the surface of SiC, SiO2 has high chemical affinity with SiC, and can form a gradient connection with nano Al2O3 coating;

[0046] Step four, deposit nano TiN coating on the moving ring 10 by magnetron sputtering: put the pretreated stainless steel moving ring into the vacuum chamber, introduce Ar gas and N2 gas, and use Ti target as the target material; apply radio frequency power to the Ti target to generate plasma under the constraint of magnetic field, Ar⁺ ions bombard the target surface, and Ti atoms are sputtered onto the surface of the moving ring and react with N2 to form TiN; control the ion energy by pulse bias to promote TiN grain refinement, and at the same time, use multi-target alternative sputtering to form "Cr-TiN gradient coating", which further relieves stress;

[0047] Deposition of DLC coating on the static ring 9 by arc ion plating: the graphite substrate needs to be cleaned by ions first to remove loose graphite particles on the surface; use graphite target as cathode, introduce CH4 gas, and apply arc voltage to make graphite target evaporate and ionize into C⁺ ions, which combine with C / H ions decomposed from CH4 to form diamond-like DLC coating on the substrate surface; introduce Si doping during deposition to form "Si-DLC nano composite coating", which reduces the internal stress of the coating and avoids peeling.

[0048] In the application, through the setting of the trace leakage sensor 22, the humidity sensor 23 and the temperature sensor 24, the sealing failure can be warned in advance, sufficient maintenance time is obtained for the maintenance personnel, production interruption and quality accidents caused by leakage are avoided, through analysis of historical monitoring data, the remaining service life of the sealing element can be predicted, the maintenance plan is optimized, the intelligent level of equipment management is improved, and when the stirring shaft rotates for a long time, the temperature of the contact area is increased, the air in the assembly sleeve 1 is made to flow by cooperating with the air extraction equipment and the air supply equipment, so that the structure inside the assembly sleeve 1 is cooled, the temperature is prevented from being too high, the use stability is ensured, through the setting of the nano coating, the erosion and wear of the sealing surface caused by the material particles in the stirring process can be effectively resisted, the friction coefficient is reduced by 30%-50%, so that the wear rate of the sealing element is reduced and the service life is prolonged, meanwhile, the smooth coating surface can also reduce the adhesion of the material and reduce the risk of material crystallization or solidification on the sealing surface, so that the long-term stability of the sealing performance is ensured.

[0049] Embodiment three: according to Figure 6 As shown in the figure, it also includes a data processing system, the data processing system 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 is composed of a trace leakage sensor 22, a humidity sensor 23, a temperature sensor 24 and a micro pressure sensor 7, which is used for collecting sealing parameters and obtaining original data of pressure, temperature and humidity and leakage state;

[0050] The information conditioning module 29 is used for processing the original signal output by the sensor, converting the 4-20mA analog signal of the micro pressure sensor 7 into a 0-3.3v standard signal, eliminating electromagnetic noise by using an RC low-pass filter circuit, linearizing the PT100 signal of the 24, and ensuring the stability and reliability of the data signal;

[0051] The synchronous sampling module 30 is used for controlling the sampling time sequence of the sensor, unifying the sampling frequency of the trace leakage sensor 22, the humidity sensor 23 and the temperature sensor 24 to 50Hz based on the timer function of the STM32H743IGH6, increasing the micro pressure sensor 7 to 100Hz, and synchronously receiving signals through a parallel interface to avoid data deviation caused by sampling time difference;

[0052] The data fusion module 31 is used for processing redundant data of the sensor, taking the average of the median filtered sampling values of the sensor to eliminate the influence of uneven pressure in the side-through cavity 20, and performing correlation analysis on the temperature and humidity data to improve the accuracy of state judgment.

[0053] The temperature compensation module 33 is used for correcting the interference of temperature on pressure measurement, calculating the correction coefficient in real time based on the ideal gas state equation and the data of the temperature sensor 24, avoiding the natural deviation of pressure caused by the temperature rise of the sealing assembly during operation, and ensuring the accuracy of the adjustment reference.

[0054] The pressure adaptive module 34 is used for providing auxiliary closed loop for pressure regulation, installing a micro flowmeter on the gas supply and exhaust pipeline, monitoring the gas flow in real time through the micro flowmeter on the gas supply / exhaust pipeline, and feeding back to the PID controller to limit the valve opening when the flow is greater than the set threshold, so as to avoid the pressure fluctuation caused by excessive gas supply / exhaust.

[0055] The segmented control module 35 is used for realizing fine adjustment of pressure, dynamically switching PID parameters according to pressure deviation, avoiding overshoot through integral separation mechanism, outputting 4-20mA current signal to control the opening of proportional control valve, and ensuring the pressure regulation accuracy of ±0.15kPa.

[0056] The flow feedback module 36 is used for providing auxiliary closed loop for pressure regulation, monitoring the gas flow in real time through the micro flowmeter on the gas supply / exhaust pipeline, and feeding back to the PID controller to limit the valve opening when the flow is greater than the set threshold, so as to avoid the pressure fluctuation caused by excessive gas supply / exhaust.

[0057] The data frame encoding module 38 is used for format compression and verification of transmission data, encapsulating pressure, temperature, humidity and leakage state information into a 16-byte binary frame, reducing the data amount by 60% compared with ASCII encoding, and ensuring the transmission integrity through CRC16 verification.

[0058] The wired backup module 39 is used as a redundant guarantee for wireless transmission, and adopts shielded twisted pair to connect the factory system. When the wireless link error rate is greater than 10 -5 or the signal strength is less than -90dBm, it automatically switches to wired transmission within 50ms to ensure uninterrupted data transmission.

[0059] The wireless transmission module 40 is used as the main link for data transmission, based on an industrial LoRaWAN module, working at 2.4GHz frequency, and the transmission rate can be adjusted to 2Mbps. The shielded cover on the outer wall of the sleeve 1 resists interference, and the processed sensor data and control instructions are transmitted to the factory control system at high speed.

[0060] The fault alarm module 42 is used for monitoring system abnormalities in real time and triggering a prompt, when detecting a leakage sensor trigger, pressure over the upper limit, temperature over the upper limit or transmission link interruption > 3s, immediately start sound and light alarm, at the same time push alarm information to the factory control system through the transmission module, including fault type and positioning.

[0061] The working principle of the device is as follows: when in use, the pressure value inside the assembly sleeve 1 is detected by the micro pressure sensor 7, and the temperature at the static ring 9 below the assembly sleeve 1 is detected by the temperature sensor 24. When the pressure value inside the assembly sleeve 1 rises, it means that the pressure inside the mixer rises. When the micro leakage sensor 22 and the humidity sensor 23 detect that there is leakage inside the assembly sleeve 1, the gas supply equipment fills the assembly sleeve 1 with gas to increase the pressure inside the assembly sleeve 1 and ensure the sealing effect. When the temperature sensor 24 detects that the temperature rises, the two first connection ports 4 simultaneously flow out and enter the gas, and the gas inside the first connection port 4 is replaced to dissipate heat.

[0062] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions recorded in the foregoing embodiments or make equivalent replacements for part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A raw material mixing machine stirring shaft sealing reinforcement assembly, characterized by, The utility model relates to a kind of equipment for controlling pressure, including assembly sleeve (1), the inside fixed connection of assembly sleeve (1) is equipped with inner sleeve (19), the center line of inner sleeve (19) coincides with end slot (18), the inside upper and lower end of assembly sleeve (1) is all set with end slot (18), the inside middle part of assembly sleeve (1) is set with side through cavity (20) on both sides, the both ends of side through cavity (20) are communicated with two end slots (18) respectively, the upper and lower end of assembly sleeve (1) is fixedly connected with connecting disc (5), the upper end of assembly sleeve (1) is provided with one cover (2), the lower end of assembly sleeve (1) is equipped with second cover (3), the one end of second cover (3) and one cover (2) is respectively fixedly connected with two connecting discs (5) by the bolt setting, the outer surface of one cover (2) is fixedly connected with two first connection ports (4), two first connection ports (4) are all used to connect electric control valve, two electric control valves are used to connect gas supply equipment and air extraction equipment respectively, the middle part of the outer surface of assembly sleeve (1) is fixedly connected with second connection port (6) in upper portion, micro pressure sensor (7) is installed in the inside of second connection port (6); The middle part of the inside of inner sleeve (19) is set with bearing (15) in upper and lower portions, the inside of inner sleeve (19) is set with sealing packing (16) between two bearings (15); The both ends of the inside of inner sleeve (19) are equipped with lip seal ring (17), the outer surface of second cover (3) is fixedly connected with third connection port (8), the number of third connection port (8) is three, micro leakage sensor (22), humidity sensor (23) and temperature sensor (24) are respectively installed in the inside of three third connection ports (8), and detection end faces stirring shaft; The both ends of inner sleeve (19) are provided with mechanical sealing mechanism, and the mechanical sealing mechanism comprises static ring (9), dynamic ring (10), push ring (11), spring (12) and spring seat (13); One end of spring seat (13) is provided with notch, the notch is clamped with the end of inner sleeve (19), and the end of spring seat (13) and push ring (11) is provided with limiting slot (14); The lower end of dynamic ring (10) is provided with bottom slot (25), and one end of push ring (11) is rotatably connected with bottom slot (25). The inner ring surface of dynamic ring (10) is provided with inner ring groove (26), and dynamic ring sealing ring (21) is installed in the inside of inner ring groove (26), and dynamic ring (10) is rotatably connected with static ring (9), and two static rings (9) are installed in one end of the inside of one cover (2) and second cover (3).

2. The raw material mixer shaft seal reinforcement assembly of claim 1, wherein: The contact surface between dynamic ring (10) and static ring (9) is provided with nano coating, and the thickness is 0.5-2 μm.

3. The primary pharmaceutical mixing machine shaft seal reinforcement assembly of claim 2, wherein: Also includes a data processing system, the data processing system includes data acquisition module (27), data processing and control module (32), data transmission module (37) and execute alarm module (41), the data acquisition module (27) includes sensor module (28), information conditioning module (29), synchronous sampling module (30) and data fusion module (31), the data processing and control module (32) includes temperature compensation module (33), pressure adaptive module (34), segmented control module (35) and flow feedback module (36), the data transmission module (37) includes data frame encoding module (38), wired backup module (39), wireless transmission module (40) and factory control system, the execute alarm module (41) includes fault alarm module (42) and electric valve.

4. The primary pharmaceutical mixing machine shaft seal reinforcement assembly of claim 3, wherein: The sensor module (28) is composed of micro leakage sensor (22), humidity sensor (23), temperature sensor (24) and micro pressure sensor (7), which is used for collecting sealing parameters, obtaining original data of pressure, temperature and humidity and leakage state; The information conditioning module (29) is used for processing the original signal output by the sensor, converting the 4-20mA analog signal of the micro pressure sensor (7) into 0-3.3v standard signal, eliminating electromagnetic noise by RC low-pass filter circuit, and linearizing the PT100 signal of the temperature sensor (24); The synchronous sampling module (30) is used for controlling the sampling time sequence of the sensor, unifying the sampling frequency of the micro leakage sensor (22), humidity sensor (23) and temperature sensor (24) to 50Hz based on the timer function of STM32H743IGH6, and improving the micro pressure sensor (7) to 100Hz, and receiving signals synchronously through parallel interface; The data fusion module (31) is used for processing redundant data of the sensor, taking average after median filtering the sampling value of the sensor, and performing correlation analysis on temperature and humidity data; The temperature compensation module (33) is used for correcting the interference of temperature on pressure measurement, and calculating correction coefficient in real time based on ideal gas state equation and temperature sensor (24) data; The pressure adaptive module (34) is used for providing auxiliary closed loop for pressure regulation, installing micro flowmeter on the gas supply and exhaust pipeline, monitoring gas flow in real time through the micro flowmeter on the gas supply / exhaust pipeline, and feeding back to the PID controller to limit the valve opening degree when the flow is greater than the set threshold value; The segmented control module (35) is used for realizing fine adjustment of pressure, dynamically switching PID parameters according to pressure deviation, avoiding overshoot through integral separation mechanism, and outputting 4-20mA current signal to control the opening degree of proportional control valve; The flow feedback module (36) is used for providing auxiliary closed loop for pressure regulation, monitoring gas flow in real time through the micro flowmeter on the gas supply / exhaust pipeline, and feeding back to the PID controller to limit the valve opening degree when the flow is greater than the set threshold value; The data frame encoding module (38) is used for format compression and verification of transmission data, encapsulating pressure, temperature, humidity, and leakage state information into a 16-byte binary frame, and verifying through CRC16; The wired backup module (39) is used as a redundancy guarantee for wireless transmission, adopts a shielded twisted pair connection to the factory system, and automatically switches to wired transmission within 50 ms when the wireless link error rate > 10 -5 or the signal strength < -90dBm. The wireless transmission module (40) is used as the main link of data transmission, based on an industrial LoRaWAN module, working in the 2.4GHz frequency band, with a transmission rate adjustable to 2Mbps, and through the shielding cover on the outer wall of the sleeve (1) to resist interference, the processed sensor data and control instructions are transmitted at high speed to the factory control system; The fault alarm module (42) is used for real-time monitoring of system abnormalities and triggering of prompts, when detecting leakage sensor triggering, pressure exceeding the upper limit, temperature exceeding the upper limit, or transmission link interruption >3s, immediately starting the audible and visual alarm, and at the same time pushing the alarm information to the factory control system through the transmission module, including the fault type and positioning.

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