A mixer with gas agitation for chemical and pharmaceutical industry

Abstract

The application belongs to the technical field of chemical pharmaceutical equipment, and particularly relates to a mixing machine with gas agitation for chemical pharmaceuticals. In view of the problems of single helical blade or paddle stirring, existence of stirring dead angle, easy precipitation of raw materials at the bottom of the tank and low mixing uniformity of the traditional mechanical stirring type mixing machine, the following scheme is proposed. The mixing machine comprises a mixing tank, four supporting legs are fixedly installed at the bottom of the mixing tank, a sealing cover is arranged at the top of the mixing tank, a feeding opening is arranged at the top of the sealing cover, a discharge pipe is communicated with the bottom of the mixing tank, a manual valve is arranged on the discharge pipe, and an electric resistance wire is wound on the outer side of the mixing tank. The mixing machine for chemical pharmaceuticals has the functions of gas agitation and mechanical stirring, uniform stirring, tank wall self-cleaning, gas recycling, lifting stirring mechanism and precise temperature control, solves the problems of the prior art, and improves the quality and efficiency of pharmaceutical raw material mixing.

Description

Technical Field

[0001] This invention relates to the field of chemical and pharmaceutical equipment technology, and in particular to a gas-stirring mixer for chemical and pharmaceutical applications. It is suitable for mixing and stirring various powdery, granular, and paste-like pharmaceutical raw materials in the chemical and pharmaceutical production process. It achieves uniform mixing of raw materials through the dual action of gas stirring and mechanical stirring. It also has functions such as heating and temperature control, tank wall cleaning, gas recycling, and lifting and cleaning of the stirring mechanism. It meets the high precision, high uniformity, energy saving and environmental protection requirements of the chemical and pharmaceutical industry for raw material mixing. Background Technology

[0002] In chemical and pharmaceutical production, the uniform mixing of raw materials is one of the core processes for ensuring drug quality. As a key piece of equipment, the mixing effect of the mixer directly affects the purity, efficacy, and production efficiency of the drug. Currently, chemical and pharmaceutical mixers are mainly divided into two categories: mechanical stirring type and gas agitation type. However, in practical use, they still have many technical shortcomings, making it difficult to meet the industry's high-quality production needs. The specific core issues are as follows: Traditional mechanical mixing machines mostly use a single spiral blade or paddle blade for mixing, which creates dead zones in the mixing process, makes it easy for raw materials to settle at the bottom of the tank, and results in low mixing uniformity. Pure gas agitation mixers only mix by airflow impact, which is not effective for mixing granular or paste-like raw materials with a large specific gravity, resulting in low mixing efficiency.

[0003] Pharmaceutical raw materials are often viscous and tend to adhere to the side and bottom walls of the mixing tank during the mixing process. Existing mixers lack dedicated tank wall cleaning structures. This adhesion not only wastes raw materials but also easily breeds bacteria, affecting drug quality. Furthermore, manual cleaning requires disassembling parts, which is time-consuming and labor-intensive. Summary of the Invention

[0004] The purpose of this invention is to solve the shortcomings of traditional mechanical stirring mixers, which mostly use a single spiral blade or paddle blade for stirring, resulting in dead zones, easy sedimentation of raw materials at the bottom of the tank, and low mixing uniformity. The invention proposes a chemical and pharmaceutical mixer with gas stirring.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A chemical and pharmaceutical mixing machine with gas agitation includes a mixing tank. Four support legs are fixedly installed at the bottom of the mixing tank. A sealing cover is provided at the top of the mixing tank, and a feeding port is provided at the top of the sealing cover. A discharge pipe is connected to the bottom of the mixing tank, and a manual valve is provided on the discharge pipe. A resistance wire is wound around the outside of the mixing tank, and a protective shell is fixedly installed on the outside of the mixing tank. The resistance wire is located inside the protective shell. A controller is provided at the top of the sealing cover, and a temperature sensor is connected to the controller. The temperature sensor is installed on the sealing cover. The inside of the mixing tank is heated by the resistance wire. The temperature sensor monitors the temperature inside the tank in real time, and the temperature data is transmitted to the controller for temperature control. The machine also includes: A height adjustment mechanism is located on the outside of the protective shell and connected to the sealing cover, used to control the height adjustment of the sealing cover; The filtration mechanism and the air supply power mechanism are both located on the top of the sealed cover. The filtration mechanism is connected to the inside of the mixing tank and the air supply power mechanism. The stirring mechanism is located on the sealed cover and connected to the air supply power mechanism, which provides power to drive the stirring mechanism to stir the inside of the mixing tank.

[0006] Preferably, the height adjustment mechanism includes three electric push rods, all of which are mounted on the outside of the protective shell. Each of the three electric push rods has a lifting block mounted on its output end, and all three lifting blocks are fixedly mounted to the outside of the sealing cover. The multiple electric push rods push the multiple lifting blocks upwards, which in turn move the sealing cover upwards, thereby lifting the entire stirring mechanism from inside the mixing tank, facilitating cleaning of the mixing tank interior and the stirring mechanism.

[0007] Preferably, the filtration mechanism includes a filter box, which is installed on top of the sealing cover. An air supply pipe is connected to the filter box and is connected to an air supply power mechanism. The filter box is filled with filter cotton, and a recovery pipe is connected to the filter box. The recovery pipe passes through the sealing cover and extends into the interior of the mixing tank. A recovery control valve is provided on the recovery pipe.

[0008] Preferably, a sealing cover is rotatably mounted on the filter box via a hinge, a branch pipe is provided on the air supply pipe, and a branch solenoid valve is provided on the branch pipe.

[0009] Preferably, the air supply power mechanism includes an air pump, which is installed on the top of the sealing cover. The inlet of the air pump is connected to the air supply pipe, and the outlet of the air pump is connected to a drive pipe. A drive pipe control valve is provided on the drive pipe, and a first circular box is connected to the drive pipe. The drive pipe is located at an eccentric position in the first circular box.

[0010] Preferably, the first round box is connected to a connecting bend, and the connecting bend is connected to a second round box, which is fixedly installed on the top of the sealing cover.

[0011] Preferably, the stirring mechanism includes a hollow tube, which is rotatably installed at the center of the sealing cover. A first impeller is fixedly installed on the top of the hollow tube. The first impeller is located inside the first circular box and has a first fan blade fixedly installed on it. The hollow tube is rotatably connected to the first circular box.

[0012] Preferably, the hollow tube has multiple air inlets on its outer side, the hollow tube passes through the second round box and is rotatably connected to the second round box, and the multiple air inlets are all located inside the second round box.

[0013] Preferably, a sealing strip is fixedly installed on the top of the hollow tube, and a rectangular support box is fixedly installed on the bottom of the hollow tube. An airflow baffle is fixedly installed inside the rectangular support box, dividing the rectangular support box into two spaces. The bottom of the hollow tube is connected to two air blowing bends, which are staggered and located in the two spaces of the rectangular support box.

[0014] Preferably, multiple driven stirring shafts are rotatably mounted inside the rectangular support box. A second impeller is fixedly mounted on the top of each driven stirring shaft. These second impellers are divided into two groups located in two spaces. Multiple second fan blades are fixedly mounted on the outer side of each second fan blade. A spiral blade is fixedly mounted on the outer side of each driven stirring shaft below the rectangular support box. The spiral blade has multiple perforations. These perforations on the spiral blade can disperse and filter the pharmaceutical raw materials during stirring, improving the mixing uniformity.

[0015] Preferably, the bottom end of the rectangular support box is connected to a cleaning metal tube, the cleaning metal tube has a U-shaped structure, and multiple cleaning holes are opened on the outer side of the cleaning metal tube.

[0016] The beneficial effects of the gas-stirring mixer for chemical and pharmaceutical applications described in this invention are as follows: 1. The gas-driven stirring mechanism achieves revolution and rotation of the driven stirring shaft, and the spiral blades form three-dimensional stirring with no dead angles, completely avoiding raw material sedimentation at the bottom of the tank. It realizes dual mixing of gas agitation and mechanical stirring, improving the mixing uniformity: The design uses a gas-driven stirring revolution and rotation structure. The airflow impact realizes the overall rotation of the stirring mechanism and the rotation of the driven stirring shaft. Combined with the spiral blades, it forms stirring without dead angles, avoids raw material sedimentation, and greatly improves the mixing uniformity and efficiency.

[0017] 2. The design incorporates a U-shaped cleaning metal tube and multi-angle cleaning holes, utilizing the airflow from the agitation to spray and clean the side and bottom walls of the mixing tank, preventing pharmaceutical raw materials from adhering, reducing material waste, and lowering manual cleaning costs.

[0018] 3. A filtration mechanism is installed to dry and filter the waste heat gas in the mixing tank, which is then reused by the gas supply power mechanism, reducing the waste of heat energy and gas source, lowering the cost of production consumables, and meeting the requirements of green production.

[0019] 4. The height adjustment mechanism enables the sealing cover and the stirring mechanism to be raised and lowered as a whole, allowing the stirring mechanism to be completely lifted out of the mixing tank. This facilitates thorough cleaning of the tank interior and the surface of the stirring mechanism, avoids cross-contamination of raw materials, and makes it easier to inspect and maintain the stirring mechanism.

[0020] 5. Integrating resistance wire heating and temperature sensor detection, the controller enables real-time temperature monitoring and automatic adjustment, keeping the temperature inside the mixing tank within a preset range to meet the mixing temperature requirements of different raw materials.

[0021] 6. By creating perforations on the spiral blades, the agglomerated raw materials are dispersed and filtered during the stirring process, breaking up the clumps and further improving the uniformity of the mixing of the raw materials, thus ensuring the quality of subsequent pharmaceutical processes.

[0022] This invention is a chemical and pharmaceutical mixer that combines gas agitation and mechanical stirring, ensures uniform mixing, self-cleaning of the tank wall, gas recycling, a height-adjustable stirring mechanism, and precise temperature control. It overcomes the shortcomings of existing technologies, improves the quality and efficiency of pharmaceutical raw material mixing, reduces production costs, and is suitable for the industrial-scale mass production needs of the chemical and pharmaceutical industry. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a gas-stirring mixer for chemical and pharmaceutical applications proposed in this invention. Figure 2 This is a bottom view schematic diagram of a gas agitation mixer for chemical and pharmaceutical applications proposed in this invention. Figure 3 This is a side view of the structure of a gas agitation mixer for chemical and pharmaceutical applications proposed in this invention. Figure 4 The present invention provides a structural schematic diagram of the height adjustment mechanism, sealing cover, feeding port, filtering mechanism, and air supply power mechanism; Figure 5 This invention provides a structural schematic diagram of the sealing cap and stirring mechanism; Figure 6 This is a schematic diagram of the height adjustment mechanism, sealing cover, and feeding port proposed in this invention; Figure 7 This invention provides a structural schematic diagram of the mixing tank, discharge pipe, and resistance wire; Figure 8 This invention provides a schematic diagram of the stirring mechanism. Figure 9 The present invention provides a structural schematic diagram of the sealing strip, hollow tube, air inlet, first impeller, and first fan blade; Figure 10 A bottom view structural diagram of the sealing strip, hollow tube, air inlet, first impeller, and first fan blade proposed for this invention; Figure 11 A schematic diagram of the rectangular support box, cleaning metal tube, cleaning hole, driven stirring shaft, spiral blade, and leakage hole proposed in this invention; Figure 12 This is a schematic diagram of the filter mechanism and the air supply power mechanism proposed in this invention from one perspective. Figure 13 This is a structural schematic diagram of the filtration mechanism and the air supply power mechanism proposed in this invention from another perspective. Figure 14 A schematic diagram of the air supply power mechanism, hollow tube, and air inlet for this invention is provided. Figure 15 The present invention provides a structural schematic diagram of an air pump, a drive pipe, a first impeller, and a first fan blade.

[0024] In the diagram: 1. Mixing tank; 11. Support leg; 12. Discharge pipe; 121. Manual valve; 13. Sealing cover; 14. Feed port; 15. Protective shell; 16. Resistance wire; 2. Height adjustment mechanism; 21. Electric push rod; 22. Lifting block; 3. Controller; 31. Temperature sensor; 4. Filtration mechanism; 41. Air supply pipe; 42. Branch pipe; 421. Branch solenoid valve; 43. Filter box; 44. Filter cotton; 45. Sealing box cover; 46. Recovery pipe; 461. Recovery control valve; 5. Air supply power mechanism; 51. First circular box; 52. Air pump; 53. Drive pipe; 531. Drive pipe control valve; 54. Second circular box; 55. Connecting bend; 6. Stirring mechanism; 61. Sealing strip; 62. Hollow pipe; 621. Air inlet; 63. First impeller; 631. First fan blade; 64. Rectangular support box; 65. Cleaning metal pipe; 651. Cleaning hole; 66. Driven stirring shaft; 661. Spiral blade; 662. Leakage hole; 67. Second impeller; 671. Second fan blade; 68. Airflow baffle; 69. Blowing bend. Detailed Implementation

[0025] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this embodiment, and not all embodiments.

[0026] Example 1 Reference Figures 1-15A chemical and pharmaceutical mixing machine with gas agitation includes a mixing tank 1, a controller 3, a height adjustment mechanism 2, a filtering mechanism 4, a gas supply power mechanism 5, and a stirring mechanism 6. The mixing tank 1 has four symmetrically distributed support legs 11 fixedly installed at its bottom, and a discharge pipe 12 connected to the bottom. A manual valve 121 is installed on the discharge pipe 12, and a resistance wire 16 is wound around its outer side. A protective shell 15 is fitted over the resistance wire 16. A sealing cover 13 is installed on the top of the mixing tank 1, and a feeding port 14 is located on the top of the sealing cover 13. The controller 3 is installed on the top of the sealing cover 13 and is connected to... Temperature sensor 31 extends through sealing cover 13 into the interior of mixing tank 1; height adjustment mechanism 2 is located on the outside of protective shell 15 and connected to sealing cover 13, used to adjust the height of sealing cover 13; filtration mechanism 4 and gas supply power mechanism 5 are both installed on top of sealing cover 13, filtration mechanism 4 is connected to the interior of mixing tank 1 and connected to gas supply power mechanism 5; stirring mechanism 6 is rotatably installed at the center of sealing cover 13 and is connected to gas supply power mechanism 5, which provides power to realize gas agitation and mechanical stirring inside mixing tank 1.

[0027] Specifically, the discharge pipe 12 works in conjunction with the manual valve 121 to discharge the mixed raw materials; the outside of the mixing tank 1 is wrapped with a nickel-chromium alloy resistance wire 16 to provide heating for the mixing of raw materials, and the protective shell 15 serves to keep the temperature warm and prevent scalding; the temperature sensor 31 detects the temperature inside the tank in real time, and the data is transmitted to the controller 3, which automatically adjusts the working state of the resistance wire 16 to achieve precise temperature control and adapt to the mixing temperature requirements of different raw materials.

[0028] Reference Figure 12 In this embodiment, the filtration mechanism 4 includes a filter box 43, which is fixed to the top of the sealing cover 13 and filled with filter cotton 44. A sealing cover 45 is rotatably mounted on the filter box 43 via a hinge. One end of the filter box 43 is connected to an air supply pipe 41, which is connected to the air supply power mechanism 5. A branch pipe 42 is branched on the air supply pipe 41, and a branch solenoid valve 421 is provided on the branch pipe 42. The other end of the filter box 43 is connected to a recovery pipe 46, which passes through the sealing cover 13 and extends into the mixing tank 1. A recovery control valve 461 is provided on the recovery pipe 46.

[0029] Specifically, the filter cotton 44 is a composite structure of activated carbon and degreased cotton, which can dry and filter the waste heat gas in the mixing tank. After the branch solenoid valve 421 is closed, the waste heat gas in the mixing tank enters the filter box 43 through the recovery pipe 46. After filtration, it enters the air pump 52 through the air supply pipe 41 for reuse, realizing the circulation of air source and heat energy and reducing waste. The sealing box cover 45 can be opened for easy replacement of the filter cotton 44.

[0030] Reference Figure 12 , Figure 13In this embodiment, the air supply power mechanism 5 includes an air pump 52, a first circular box 51, and a second circular box 54. The air pump 52 and the second circular box 54 are both fixed on the top of the sealing cover 13. The inlet of the air pump 52 is connected to the air supply pipe 41, and the outlet is connected to the drive pipe 53. The drive pipe 53 is provided with a drive pipe control valve 531. The end of the drive pipe 53 away from the air pump 52 is eccentrically connected to the inside of the first circular box 51. The first circular box 51 and the second circular box 54 are connected by a connecting bend pipe 55. The second circular box 54 is sleeved on the outside of the stirring mechanism 6 and is rotatably connected to the stirring mechanism 6.

[0031] Specifically, the drive pipe 53 eccentrically sends high-pressure airflow into the first circular box 51, driving the first impeller 63 of the stirring mechanism 6 to rotate. At the same time, part of the airflow is sent into the second circular box 54 through the connecting bend pipe 55, and then enters the hollow pipe 62 through the air inlet 621, providing airflow for stirring rotation and tank wall cleaning. The drive pipe control valve 531 can adjust the airflow to adapt to the stirring requirements of different raw materials.

[0032] Reference Figures 8-10 In this embodiment, the stirring mechanism 6 includes a hollow tube 62, which is rotatably installed at the center of the sealing cover 13. A first impeller 63 is fixedly installed on the top of the tube, which is located inside the first circular box 51. Multiple first fan blades 631 are evenly fixed on the outside of the tube. The hollow tube 62 is rotatably and sealingly connected to the first circular box 51. Multiple air inlets 621 are opened on the outside of the hollow tube 62. The air inlets 621 are all located inside the second circular box 54. The hollow tube 62 is rotatably and sealingly connected to the second circular box 54.

[0033] Reference Figure 8 , Figure 10 In this embodiment, a rectangular support box 64 is fixedly installed at the bottom of the hollow tube 62. An airflow baffle 68 is fixed inside the rectangular support box 64, dividing the rectangular support box 64 into two independent cavities. The bottom of the hollow tube 62 is connected to two staggered air-blowing bends 69. The two air-blowing bends 69 extend into the two cavities respectively, and the air-blowing bends 69 have opposite air-blowing directions.

[0034] Reference Figure 8 In this embodiment, a plurality of driven stirring shafts 66 are rotatably installed inside the rectangular support box 64. A second impeller 67 is fixed to the top of each driven stirring shaft 66. The plurality of second impellers 67 are divided into two groups and located in two cavities respectively. A plurality of second impeller blades 671 are evenly fixed to the outside of the second impellers 67. A spiral blade 661 is fixed to the outside of the driven stirring shaft 66 extending to the bottom of the rectangular support box 64. A plurality of leakage holes 662 are opened on the spiral blade 661.

[0035] Specifically, a hollow tube 62 is used as the main drive shaft. The first impeller 63 drives the hollow tube 62 and the rectangular support box 64 to rotate as a whole under the impact of the airflow, realizing the revolution of the stirring mechanism. The airflow in the hollow tube 62 is sent into the two cavities of the rectangular support box 64 through two air blowing bends 69 in opposite directions, impacting the second impeller 671 and driving the second impeller 67 and the driven stirring shaft 66 to rotate. The spiral blade 661 revolves and rotates with the driven stirring shaft 66, forming a stirring without dead angles. The leakage holes 662 on the spiral blade 661 can break up the agglomerated raw materials during stirring, realizing dispersion and filtration.

[0036] Reference Figure 11 In this embodiment, the bottom end of the rectangular support box 64 is connected to a U-shaped cleaning metal pipe 65. The outer side wall of the cleaning metal pipe 65 is evenly provided with a plurality of cleaning holes 651, and the air outlet direction of the cleaning holes 651 is towards the inner side wall and bottom wall of the mixing tank 1.

[0037] Specifically, a hollow tube 62 is used as the main drive shaft. The first impeller 63 drives the hollow tube 62 and the rectangular support box 64 to rotate as a whole under the impact of the airflow, realizing the revolution of the stirring mechanism. The airflow in the hollow tube 62 is sent into the two cavities of the rectangular support box 64 through two air blowing bends 69 in opposite directions, impacting the second impeller 671 and driving the second impeller 67 and the driven stirring shaft 66 to rotate. The spiral blade 661 revolves and rotates with the driven stirring shaft 66, forming a stirring without dead angles. The leakage holes 662 on the spiral blade 661 can break up the agglomerated raw materials during stirring, realizing dispersion filtration.

[0038] Reference Figure 4 In this embodiment, the height adjustment mechanism 2 includes multiple electric push rods 21 and multiple lifting blocks 22. The electric push rods 21 are symmetrically fixed on the outer side wall of the protective shell 15, and the output end is fixedly connected to the lifting block 22. The lifting block 22 is fixedly connected to the lower surface of the sealing cover 13. The extension and retraction of the electric push rods 21 drive the sealing cover 13 and the stirring mechanism 6 to perform lifting and lowering movements.

[0039] In this embodiment, the mixing tank 1, sealing cover 13, rectangular support box 64, and cleaning metal tube 65 are all made of 304 stainless steel. The resistance wire 16 is a nickel-chromium alloy heating wire, and the filter cotton 44 is a composite filter structure of activated carbon and degreased cotton, which has the dual functions of drying and filtering.

[0040] In this embodiment, the controller 3 is a programmable PLC controller, which is electrically connected to the temperature sensor 31, the resistance wire 16, the air pump 52, the branch solenoid valve 421, the recovery control valve 461, the drive tube control valve 531, and the electric push rod 21 to realize the automated linkage control of the entire system.

[0041] In this embodiment, the installation and commissioning steps of a gas agitation mixer for chemical and pharmaceutical applications are as follows: Basic installation: Move the assembled mixer to the preset operating position for chemical and pharmaceutical production, and adjust the support legs 11 to keep the equipment level and stable; connect the external 380V AC power supply to the equipment, and check whether the connections of each electrical circuit are secure to avoid short circuits and leakage; check whether the connections of each air pipe are sealed, apply food-grade grease to each rotating seal to ensure smooth rotation; fill the filter box 43 with filter cotton 44, and close the sealing box cover 45.

[0042] Electrical system debugging: Start controller 3 and perform self-test on all electrical components. Check whether the power supply to temperature sensor 31, resistance wire 16, air pump 52, solenoid valves, and electric push rod 21 is normal, and whether the controller's control function is normal. Start each component individually and test its operating status: whether the heating of resistance wire 16 is normal, whether temperature sensor 31 can accurately transmit temperature data, whether air pump 52 runs smoothly and whether the air supply is normal, whether the solenoid valves switch flexibly without jamming or leakage, and whether the extension and retraction of electric push rod 21 is smooth and whether the lifting and lowering of sealing cover 13 is stable.

[0043] Heating and temperature control debugging: Set the mixing temperature in controller 3 to 50℃, start the resistance wire 16, and observe the detection data of temperature sensor 31. When the temperature inside the tank reaches the preset value, check whether the controller can automatically turn off the resistance wire 16; when the temperature is lower than the preset value, check whether it can automatically start to ensure temperature control accuracy.

[0044] Gas supply and stirring debugging: Close the recovery control valve 461, open the branch solenoid valve 421 and the drive pipe control valve 531, start the air pump 52, adjust the air flow rate, observe whether the stirring mechanism 6 can revolve and rotate normally, whether the spiral blade 661 rotates smoothly, without jamming or abnormal noise; check whether the air jet from the cleaning hole 651 is smooth and whether the direction is towards the tank wall.

[0045] Gas circulation test: Close the branch solenoid valve 421, open the recovery control valve 461, start the air pump 52, and check whether the gas in the mixing tank 1 can circulate through the recovery pipe 46, filter box 43, and air supply pipe 41, and whether there is any gas leakage.

[0046] Height adjustment and debugging: Start the electric push rod 21 to test whether the lifting and lowering of the sealing cover 13 and the stirring mechanism 6 is stable, whether the mixing tank 1 can be completely lifted out, and whether the sealing cover 13 and the mixing tank 1 are sealed and fitted after lowering.

[0047] Full system linkage debugging: Add an appropriate amount of simulated pharmaceutical raw materials into the mixing tank 1 through the feeding port 14. Preset parameters such as mixing temperature, stirring time, and airflow in the controller 3, and start the automatic operation of the entire system; check the coordination and linkage of each mechanism: whether the heating temperature control is accurate, whether the revolution and rotation of the stirring mechanism are normal, whether the tank wall cleaning is effective, and whether the raw materials are free from sedimentation and sticking to the wall; after stirring is completed, open the manual valve 121 and check whether the discharge is smooth; start the electric push rod 21 to lift the stirring mechanism out of the mixing tank, check the cleanliness of the tank and the surface of the stirring mechanism, test the operating stability of the equipment, troubleshoot any abnormalities, adjust the parameters to the optimal state, complete the debugging, and prepare for formal production.

[0048] The chemical and pharmaceutical mixing machine of this invention, equipped with gas agitation, achieves fully automated operation throughout the entire process through seven interconnected working mechanisms via a controller. These mechanisms include "raw material addition, heating and temperature control, gas-driven dual stirring, tank wall gas cleaning, waste heat gas circulation, raw material discharge, and mechanism lifting and cleaning." Each mechanism and component is closely linked, forming a complete production closed loop. The entire process corresponds to the component labels, ensuring precise matching of structure and function. The specific working principle is explained in seven mechanisms as follows: Open the feeding port 14 at the top of the sealing cover 13 and add the pharmaceutical raw materials to be mixed into the mixing tank 1 through the feeding port. The amount added should not exceed 80% of the volume of the mixing tank to avoid the raw materials overflowing during stirring. After the addition is completed, close the feeding port. The controller starts the resistance wire 16 according to the preset temperature to heat the raw materials in the mixing tank 1. The temperature sensor 31 detects the temperature inside the tank in real time and transmits the detection data to the controller 3 in real time. When the temperature inside the tank reaches the preset value, the controller automatically turns off the resistance wire 16. When the temperature inside the tank is lower than the preset value due to heat loss, the controller automatically starts the resistance wire 16 to achieve precise and automatic control of the temperature inside the tank, providing a suitable temperature environment for the mixing of raw materials. The protective shell 15 effectively reduces heat loss inside the tank and improves heating efficiency.

[0049] Gas supply drives the stirring and revolution mechanism; Controller 3 starts air pump 52 and simultaneously opens branch solenoid valve 421 and drive pipe control valve 531. Outside air enters air supply pipe 41 through branch pipe 42, and is then pressurized by air pump 52 and eccentrically sent into the first circular box 51 through drive pipe 53. The high-pressure airflow impacts the first fan blade 631 inside the first circular box 51, generating rotational power to drive the first impeller 63 to rotate. The first impeller 63 drives the hollow tube 62 to rotate around the central axis of the sealing cover 13, which in turn drives the rectangular support box 64 at the bottom of the hollow tube 62, the driven stirring shaft 66, the spiral blade 661, and the cleaning metal tube 65 to rotate as a whole, realizing the revolution of the stirring mechanism 6. When the spiral blade 661 revolves with the stirring mechanism, it performs preliminary mechanical stirring of the raw materials in the mixing tank 1, breaking the accumulation state of the raw materials and laying the foundation for subsequent self-rotation stirring.

[0050] Gas-driven stirring and rotation mechanism for raw material tumbling; Part of the high-pressure airflow output by the air pump 52 enters the first circular box 51 through the drive pipe 53, and then enters the second circular box 54 through the connecting bend pipe 55. The high-pressure airflow in the second circular box 54 enters the inner cavity of the hollow tube 62 through multiple air inlets 621 on the outside of the hollow tube 62, and then enters the two cavities of the rectangular support box 64 divided by the airflow baffle 68 through two staggered blowing bend pipes 69 at the bottom of the hollow tube 62 with opposite air outlet directions. The high-pressure airflow impacts the second fan blade 671 in the cavity, generating rotational power to drive the second impeller 67 and the driven agitator. The stirring shaft 66 rotates around its own axis, realizing the rotation of the driven stirring shaft 66; the driven stirring shaft 66 drives the spiral blade 661 to perform a compound motion of revolution and rotation, forming a three-dimensional, dead-angle-free stirring, completely avoiding the sedimentation of raw materials at the bottom of the mixing tank 1; at the same time, the multiple holes 662 on the spiral blade 661 disperse and filter the agglomerated raw materials during the stirring process, breaking up the agglomerates and making the raw materials more uniformly mixed; the opposite air outlet directions of the two air blowing bends 69 ensure that the driven stirring shafts 66 on both sides can obtain sufficient rotational power, improving the uniformity of stirring.

[0051] Tank wall gas self-cleaning mechanism; The high-pressure airflow in the two cavities of the rectangular support box 64, after driving the driven stirring shaft 66 to rotate, eventually converges into the U-shaped cleaning metal tube 65 at the bottom of the rectangular support box 64. The high-pressure airflow is ejected at high pressure through multiple cleaning holes 651 opened on the outside of the cleaning metal tube 65, and the outlet direction of the cleaning holes 651 is precisely towards the inner side wall and bottom wall of the mixing tank 1. While the stirring mechanism 6 revolves, the high-pressure airflow performs all-round, no-dead-angle jet cleaning on the side wall and bottom wall of the mixing tank, blowing the sticky pharmaceutical raw materials adhering to the tank wall into the tank to continue to participate in the mixing, avoiding waste and pollution caused by raw materials sticking to the wall, and eliminating the need for manual cleaning of the tank wall, thus reducing the labor intensity of the staff.

[0052] Waste heat gas recycling mechanism; Once the temperature inside the mixing tank 1 reaches the preset value, in order to achieve the recycling of heat energy and gas source, the controller 3 closes the branch solenoid valve 421 to stop the intake of outside air, and at the same time opens the recovery control valve 461. Under the negative pressure of the air pump 52, the waste heat gas in the mixing tank 1 enters the filter box 43 through the recovery pipe 46. The activated carbon + degreased cotton composite filter cotton 44 in the filter box 43 dries and filters the waste heat gas, removing water vapor and raw material dust from the gas. The filtered, dried, and clean waste heat gas enters the air pump 52 through the air supply pipe 41, is repressurized, and then sent to the stirring and cleaning stage to achieve the recycling of gas source. At the same time, the recycling of waste heat gas recovers the heat energy in the tank, reduces the heating energy consumption of the resistance wire 16, and significantly reduces the production consumables and energy costs, meeting the requirements of energy-saving and environmentally friendly green production. When the filter cotton 44 becomes damp or clogged, the sealing box cover 45 can be opened to replace it in time to ensure the filtration effect.

[0053] Raw material discharge and mixing mechanism lifting and cleaning mechanism; Raw material discharge: When the mixing time reaches the preset value of controller 3, the controller automatically stops the air pump 52 and the resistance wire 16 to complete the mixing of raw materials; the operator opens the manual valve 121 on the discharge pipe 12, and the uniformly mixed pharmaceutical raw materials are smoothly discharged through the discharge pipe 12 under the action of gravity and discharged into the preset receiving container, completing the core process of raw material mixing; after the discharge is completed, the manual valve 121 is closed.

[0054] Lifting and Cleaning: To avoid cross-contamination caused by material residue inside the tank and on the surface of the mixing mechanism, the controller 3 activates the electric push rod 21. The output end of the electric push rod extends upward, driving the lifting block 22 and the sealing cover 13 to move upward, thereby lifting the entire mixing mechanism 6 out of the mixing tank 1. Workers can then thoroughly clean the inside of the mixing tank 1, the spiral blade 661 of the mixing mechanism 6, the cleaning metal pipe 65, the rectangular support box 64, and other components, leaving no blind spots. After cleaning, the controller activates the electric push rod 21 to retract, driving the sealing cover 13 and the mixing mechanism 6 to their original positions. The sealing cover 13 seals tightly against the mixing tank 1, and the equipment returns to standby mode, ready for the next material mixing operation. If the mixing mechanism malfunctions, it can be repaired directly after lifting without disassembling the entire equipment, making repairs convenient.

[0055] Example 2 Example 2 is the same as Example 1 in the rest, except that: The tank wall is heavily adhered to material, resulting in poor cleaning effect: Check if the cleaning hole 651 is blocked by raw material and clear it with a thin wire; check if the air flow rate of the air pump 52 is too low and increase the air flow; check if the air outlet direction of the cleaning metal pipe 65 is deviated and adjust it to face the tank wall.

[0056] Poor gas circulation or gas leakage: Check if the connections of each gas pipe are loose and tighten them again; check if each solenoid valve and recovery pipe 46 are blocked by raw materials and clean the blockages; check if the sealing cover 45 of the filter box 43 is sealed and replace the rubber sealing gasket.

[0057] If the stirring mechanism is not lifting smoothly or is stuck: check if the output end of the electric push rod 21 is offset and adjust the position of the bracket; check if the connection between the lifting block 22 and the sealing cover 13 is firm and re-weld; check if there is any material stuck between the mixing tank 1 and the sealing cover 13 and clear the stuck material.

[0058] Poor material discharge: Check if the discharge pipe 12 is blocked by raw material clumps and clean the blockage; check if the manual valve 121 is stuck and repair or replace the valve.

[0059] All structural shapes, sizes, and materials included in Embodiment 1 in this application can be selected and adjusted to meet specific usage needs. The accompanying drawings are schematic structural diagrams, and the actual dimensions can be appropriately adjusted.

[0060] The above description is only a preferred embodiment of this practice, but the scope of protection of this embodiment is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope of the technology disclosed in this embodiment, based on the technical solution and inventive concept of this embodiment, should be covered within the scope of protection of this embodiment.

Claims

1. A chemical and pharmaceutical mixing machine with gas agitation, comprising a mixing tank (1), wherein four support legs (11) are fixedly installed at the bottom of the mixing tank (1), a sealing cover (13) is provided at the top of the mixing tank (1), a feeding port (14) is provided at the top of the sealing cover (13), and a discharge pipe (12) is connected to the bottom of the mixing tank (1), wherein a manual valve (121) is provided on the discharge pipe (12), characterized in that, A resistance wire (16) is wound around the outside of the mixing tank (1), and a protective shell (15) is fixedly installed on the outside of the mixing tank (1). The resistance wire (16) is located inside the protective shell (15). A controller (3) is installed on the top of the sealing cover (13), and a temperature sensor (31) is connected to the controller (3). The temperature sensor (31) is installed on the sealing cover (13). The mixture also includes: The height adjustment mechanism (2) is located on the outside of the protective shell (15) and connected to the sealing cover (13) for controlling the height adjustment of the sealing cover (13); The filtration mechanism (4) and the air supply power mechanism (5) are both located on the top of the sealing cover (13). The filtration mechanism (4) is connected to the interior of the mixing tank (1), and the filtration mechanism (4) is connected to the air supply power mechanism (5). The stirring mechanism (6) is set on the sealing cover (13) and connected to the gas supply power mechanism (5). The gas supply power mechanism (5) provides power to drive the stirring mechanism (6) to work and stir the inside of the mixing tank (1).

2. A chemical and pharmaceutical mixer with gas agitation according to claim 1, characterized in that, The filtration mechanism (4) includes a filter box (43), which is installed on the top of the sealing cover (13). An air supply pipe (41) is connected to the filter box (43), which is connected to the air supply power mechanism (5). The filter box (43) is filled with filter cotton (44). A recovery pipe (46) is connected to the filter box (43). The recovery pipe (46) passes through the sealing cover (13) and extends into the interior of the mixing tank (1). A recovery control valve (461) is provided on the recovery pipe (46).

3. A chemical and pharmaceutical mixer with gas agitation according to claim 2, characterized in that, The filter box (43) is fitted with a sealing cover (45) via a hinge, and the air supply pipe (41) is provided with a branch pipe (42), and the branch pipe (42) is provided with a branch solenoid valve (421).

4. A chemical and pharmaceutical mixer with gas agitation according to claim 3, characterized in that, The air supply power mechanism (5) includes an air pump (52), which is installed on the top of the sealing cover (13). The inlet of the air pump (52) is connected to the air supply pipe (41), and the outlet of the air pump (52) is connected to a drive pipe (53). A drive pipe control valve (531) is provided on the drive pipe (53), and a first circular box (51) is connected to the drive pipe (53). The drive pipe (53) is located at an eccentric position of the first circular box (51).

5. A chemical and pharmaceutical mixer with gas agitation according to claim 4, characterized in that, The first round box (51) is connected to a connecting bend (55), and the connecting bend (55) is connected to a second round box (54), which is fixedly installed on the top of the sealing cover (13).

6. A chemical and pharmaceutical mixer with gas agitation according to claim 5, characterized in that, The stirring mechanism (6) includes a hollow tube (62), which is rotatably installed at the center of the sealing cover (13). A first impeller (63) is fixedly installed on the top of the hollow tube (62). The first impeller (63) is located inside the first round box (51) and a first fan blade (631) is fixedly installed thereon. The hollow tube (62) is rotatably connected to the first round box (51).

7. A chemical and pharmaceutical mixer with gas agitation according to claim 6, characterized in that, The hollow tube (62) has multiple air inlets (621) on its outer side. The hollow tube (62) passes through the second round box (54) and is rotatably connected to the second round box (54). The multiple air inlets (621) are all located inside the second round box (54).

8. A chemical and pharmaceutical mixer with gas agitation according to claim 7, characterized in that, A sealing strip (61) is fixedly installed on the top of the hollow tube (62), and a rectangular support box (64) is fixedly installed on the bottom of the hollow tube (62). An airflow baffle (68) is fixedly installed inside the rectangular support box (64), dividing the rectangular support box (64) into two spaces. The bottom of the hollow tube (62) is connected to two air blowing bends (69). The two air blowing bends (69) are staggered and located in the two spaces of the rectangular support box (64).

9. A chemical and pharmaceutical mixer with gas agitation according to claim 8, characterized in that, Multiple driven stirring shafts (66) are rotatably installed inside the rectangular support box (64). A second impeller (67) is fixedly installed on the top of each driven stirring shaft (66). The multiple second impellers (67) are divided into two groups located in two spaces. Multiple second impeller blades (671) are fixedly installed on the outside of the second impellers (67). A spiral blade (661) is fixedly installed on the outside of the driven stirring shaft (66) below the rectangular support box (64). Multiple drain holes (662) are opened on the spiral blade (661). A cleaning metal pipe (65) is connected to the bottom end of the rectangular support box (64). The cleaning metal pipe (65) has a U-shaped structure. Multiple cleaning holes (651) are opened on the outside of the cleaning metal pipe (65).

10. A chemical and pharmaceutical mixer with gas agitation according to claim 1, characterized in that, The height adjustment mechanism (2) includes three electric push rods (21), all three electric push rods (21) are installed on the outside of the protective shell (15), and each of the three electric push rods (21) has a lifting block (22) installed at its output end. Each of the three lifting blocks (22) is fixedly installed on the outside of the sealing cover (13).

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