Discharge and crushing device of vacuum belt drying system for traditional Chinese medicine formula granules

Abstract

The application belongs to the field of pharmaceutical machinery, and particularly relates to a discharging and crushing device of a vacuum belt drying system for traditional Chinese medicine formula granules, which comprises, in sequence, a spiral primary crusher, a fine crusher, a material collecting valve, a material collecting buffer tank, a vacuum feeder, a discharger and a material collecting bin, wherein the feeding end of the spiral primary crusher is connected with the vacuum belt drying system; the bottom of the material collecting buffer tank is connected with an air filter core through a first pipeline, and a make-up air valve is arranged on the first pipeline. By sealingly connecting the spiral primary crusher, the fine crusher, the material collecting valve, the material collecting buffer tank, the vacuum feeder, the discharger and the material collecting bin in sequence, an integrated and fully-closed crushing-material collecting-conveying system is constructed. The device is compact in structure, high in automation, improves the overall operation efficiency of the system and the consistency of products, and is particularly suitable for the post-processing of heat-sensitive and high-value-added materials.

Description

Technical Field

[0001] This application belongs to the field of pharmaceutical machinery, specifically relating to a discharge pulverizing device for a vacuum belt drying system for traditional Chinese medicine formula granules. Background Technology

[0002] Vacuum belt drying technology is widely used in the food, pharmaceutical, and chemical industries due to its advantages such as low temperature, high efficiency, and continuous operation. This technology effectively preserves the activity of heat-sensitive components and improves product quality by continuously conveying and drying materials in a vacuum environment. However, after drying, the material is usually in a block or sheet-like structure, requiring further crushing to meet the requirements of subsequent packaging, mixing, or formulation processes.

[0003] In existing technologies, common discharge crushing methods often employ a single crushing device (such as a hammer mill or universal crusher) directly connected to the dryer outlet. However, this method has the following problems: After drying, the material has low moisture content and high brittleness, which easily generates a lot of dust during the crushing process, causing material loss and environmental pollution. The crushing and collection processes are not closed and linked, which can easily introduce external impurities and affect the cleanliness of the product. It is especially unsuitable for the pharmaceutical field with strict GMP requirements. Summary of the Invention

[0004] The technical problem to be solved by this application is to provide a discharge pulverizing device for a vacuum belt drying system for traditional Chinese medicine formula granules, which has high integration, good sealing performance, and dust control function, thereby improving overall performance and applicability.

[0005] This application provides a discharge pulverizing device for a vacuum belt drying system for traditional Chinese medicine formula granules, comprising a spiral coarse crusher, a fine crusher, a receiving valve, a receiving buffer tank, a vacuum feeder, a discharger, and a collection bin connected in sequence. The feed end of the spiral crusher is connected to the vacuum belt drying system; The bottom of the receiving buffer tank is connected to an air filter element through a first pipe, and a make-up air valve is installed on the first pipe. The bottom of the receiving buffer tank is also connected to a second pipe for connecting to a vacuum feeder, and a discharge valve is provided on the second pipe. The bottom of the collection bin is equipped with a discharge valve.

[0006] Optionally, the fine pulverizer includes a fine pulverizing motor and pulverizing blades connected thereto, wherein the pulverizing blades use a high-speed rotation method to refine the material.

[0007] Optionally, the vacuum feeder is equipped with a feeding vacuum valve and a dust removal backflushing valve.

[0008] Optionally, the top of the collection bin is provided with a discharge sight glass cover to facilitate observation of the material condition inside the collection bin.

[0009] Optionally, the bottom of the spiral coarse crusher near the discharge end is connected to the feed inlet of the fine crusher.

[0010] Optionally, the receiving buffer tank is equipped with a first material level sensing module, which is used to monitor the amount of material in the tank in real time and control the operation of the corresponding valves.

[0011] Optionally, the collection bin is equipped with a second material level sensing module for real-time monitoring of the material quantity in the bin and controlling the operation of the corresponding valves.

[0012] Optionally, the first and second level sensing modules are tuning fork, capacitive, or radar level sensors, and their output signals are connected to the PLC control system for linkage control of the opening and closing of the unloading valve and the discharge valve.

[0013] Optionally, the air filter element is a membrane filter cartridge or a sintered metal filter element, with a filtration accuracy of ≤1μm.

[0014] Optionally, the discharge end of the spiral coarse crusher is sealed to the fine crushing mechanism using a flange or quick-release clamp to ensure that the whole machine is in a closed negative pressure state.

[0015] The beneficial effect of this application is that by sequentially and tightly connecting components such as a spiral coarse crusher, a fine crusher, a receiving valve, a receiving buffer tank, a vacuum feeder, a discharger, and a collection silo, an integrated, fully enclosed crushing-receiving-conveying system is constructed. The dried brittle material first enters the spiral coarse crusher for preliminary crushing, reducing the block size and the load on subsequent fine crushing; then it enters the fine crusher to achieve the required particle size; the crushed powder is temporarily stored in the receiving buffer tank via the receiving valve. During this process, the air supply valve and air filter work together to achieve airflow balance and dust interception, effectively suppressing dust dispersion; when the material in the buffer tank reaches the set amount, the discharge valve is opened, and the vacuum feeder tightly conveys the material to the collection silo, where it is finally collected uniformly through the discharge valve. The entire process operates continuously in a closed environment, significantly reducing dust pollution and material loss, and preventing the intrusion of external impurities, fully meeting the stringent GMP requirements for cleanliness and airtightness in pharmaceutical processes. In addition, the device has a compact structure and a high degree of automation, which improves the overall operating efficiency of the system and product consistency. It is particularly suitable for post-processing scenarios of heat-sensitive and high-value-added materials. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the discharge crushing device provided in the embodiments of this application.

[0017] In the diagram: 10. Spiral coarse crusher; 11. Fine crusher; 12. Receiving valve; 13. Receiving buffer tank; 131. First material level sensing module; 14. Vacuum feeder; 141. Feeding vacuum valve; 142. Dust removal back-blowing valve; 15. Unloader; 16. Collection bin; 161. Discharge valve; 162. Discharge sight glass cover; 163. Second material level sensing module; 17. First pipeline; 18. Air filter; 19. Make-up air valve; 20. Discharge valve; 21. Second pipeline. Detailed Implementation

[0018] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0019] like Figure 1 As shown, the present application provides a discharge pulverizing device for a vacuum belt drying system for traditional Chinese medicine formula granules, comprising a spiral coarse crusher 10, a fine crusher 11, a receiving valve 12, a receiving buffer tank 13, a vacuum feeder 14, a discharger 15, and a collection bin 16 connected in sequence; wherein, the feed end of the spiral coarse crusher 10 is connected to the vacuum belt drying system; the bottom of the receiving buffer tank 13 is connected to an air filter element 18 through a first pipe 17, and a make-up air valve 19 is provided on the first pipe 17; the bottom of the receiving buffer tank 13 is also connected to a second pipe 21 for connecting to the vacuum feeder 14, and a discharge valve 20 is provided on the second pipe 21; the bottom of the collection bin 16 is provided with a discharge valve 161.

[0020] Compared with existing technologies, the discharge pulverizing device of the vacuum belt drying system for traditional Chinese medicine formula granules provided in this application constructs an integrated, fully enclosed pulverizing-collecting-conveying system by sequentially and tightly connecting components such as a spiral coarse crusher 10, a fine crusher 11, a receiving valve 12, a receiving buffer tank 13, a vacuum feeder 14, a discharger 15, and a collection bin 16. The dried brittle material first enters the spiral coarse crusher 10 for preliminary crushing, reducing the block size and the subsequent fine crushing load; then it enters the fine crusher 11 to complete the particle size standard treatment; the pulverized powder is temporarily stored in the receiving buffer tank 13 through the receiving valve 12. During this process, the air supply valve 19 and the air filter element 18 work together to achieve airflow balance and dust interception, effectively suppressing dust dispersion; when the material in the buffer tank reaches the set amount, the discharge valve 20 is opened, and the vacuum feeder 14 is used to tightly transport the material to the collection bin 16, and finally collect it uniformly through the discharge valve 161. The entire process operates continuously in a closed environment, which not only significantly reduces dust pollution and material loss, but also prevents the intrusion of external impurities, fully meeting the stringent GMP requirements for cleanliness and airtightness in pharmaceutical processes. Furthermore, the device is compact and highly automated, improving overall system efficiency and product consistency, making it particularly suitable for the post-processing of heat-sensitive and high-value-added materials.

[0021] In one possible implementation, the fine pulverizer 11 includes a fine pulverizing motor and pulverizing blades connected thereto, the pulverizing blades using a high-speed rotation method to refine the material.

[0022] Specifically, the fine pulverizer 11 is driven by a fine pulverizing motor to rotate the pulverizing blades at high speed. After the material is pre-treated by the spiral coarse crusher 10, it enters the fine pulverizing chamber. Under the combined action of centrifugal force and shear force, it is repeatedly impacted, cut and ground by the high-speed rotating blades, thereby achieving fine control of particle size. The pulverizing chamber adopts a fully enclosed structure and is directly connected to the downstream receiving valve 12 to ensure that the pulverizing process is in a closed negative pressure environment, effectively preventing dust leakage.

[0023] In one possible implementation, the vacuum feeder 14 is equipped with a feeding vacuum valve 141 and a dust removal backflushing valve 142.

[0024] Specifically, the feeding vacuum valve 141 controls the on / off state of the vacuum source. When open, it generates negative pressure, drawing material from the receiving buffer tank 13 into the vacuum feeder 14 through a pipeline. The dust removal backflushing valve 142 connects to a compressed air source. After material conveying is complete or the filter element pressure difference reaches a set value, it automatically triggers a reverse pulse airflow to instantly backflush and clean the built-in filter element, removing dust adhering to its surface, restoring its permeability, and preventing clogging. This design not only ensures continuous and stable operation of the vacuum feeding process but also significantly improves dust interception efficiency, avoids cross-contamination, and further enhances the airtightness and GMP compliance of the entire discharge pulverizing system. It is particularly suitable for pharmaceutical production environments with stringent requirements for cleanliness and yield.

[0025] In one possible implementation, the top of the collection bin 16 is provided with a discharge sight glass cover 162 to facilitate observation of the material condition inside the collection bin 16.

[0026] Specifically, the observation part of the discharge sight glass cover 162 is made of transparent pressure-resistant material (such as borosilicate glass or polycarbonate) and is embedded in a flange structure with a sealing gasket to ensure the overall airtightness of the silo. Operators can observe the material accumulation height, flowability and bridging phenomenon in the silo in real time through the sight glass cover, so as to adjust the discharge rhythm or intervene in abnormal working conditions in a timely manner.

[0027] In one possible implementation, the bottom of the spiral coarse crusher 10 near the discharge end is connected to the feed inlet of the fine crusher 11.

[0028] Specifically, the bottom of the spiral coarse crusher 10 near the discharge end is directly and tightly connected to the feed inlet of the fine crusher 11, forming a continuous and compact material transition channel; the spiral propulsion mechanism pushes the dried block or flaky material to the discharge end, and under the combined action of gravity and spiral rotation, the material falls smoothly into the feed inlet of the fine crusher 11, avoiding intermediate retention or accumulation.

[0029] In one possible implementation, the receiving buffer tank 13 is equipped with a first material level sensing module 131, which is used to monitor the amount of material in the tank in real time and control the operation of the corresponding valves.

[0030] Specifically, when the material reaches the preset upper limit, the material level signal triggers the control system to close the upstream receiving valve 12 to prevent overflow, while simultaneously opening the discharge valve 20 and starting the vacuum feeder 14 to transfer the material to the collection bin 16. When the material level drops to the lower limit, the system automatically closes the discharge valve 20 and resumes feeding, achieving intelligent linkage between the crushing, temporary storage, and conveying processes. This design not only ensures continuous and stable system operation but also avoids the risk of blockage or drowsy suction caused by uncontrolled material levels, improving the level of automation and process reliability.

[0031] In one possible implementation, the silo 16 is equipped with a second material level sensing module 163, which is used to monitor the amount of material in the tank in real time and control the operation of the corresponding valves.

[0032] Specifically, when the material reaches the set upper limit, the system automatically closes the upstream unloading valve 20 and stops the vacuum feeder 14 to prevent overfilling and overflow; when the material drops to the lower threshold, an alarm can be triggered or the front-end equipment can be linked to resume material supply, ensuring production continuity. This material level feedback mechanism realizes intelligent control of the material collection process, avoids manual intervention, improves the system's automation level and operational safety, and meets the pharmaceutical process requirements for process controllability and cleanliness.

[0033] In one possible implementation, the first level sensing module 131 and the second level sensing module 163 are tuning fork type, capacitive type or radar type level sensors, and their output signals are connected to the PLC control system for linkage control of the opening and closing of the unloading valve 20 and the discharge valve 161.

[0034] In one possible implementation, the air filter element 18 is a membrane filter cartridge or a sintered metal filter element with a filtration accuracy of ≤1μm. This allows for efficient interception of fine dust generated during the crushing and conveying process, preventing it from escaping into the environment with the exhaust gas.

[0035] In one possible implementation, the discharge end of the spiral coarse crusher 10 is sealed to the fine crusher 11 using a flange or quick-release clamp to ensure the entire machine is under a closed negative pressure. This ensures airtightness to maintain the system's vacuum environment, facilitates disassembly and cleaning, effectively prevents cross-contamination, and improves the equipment's applicability and operational reliability in high-cleanliness environments such as pharmaceutical manufacturing.

[0036] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0037] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A discharge pulverizing device for a vacuum belt drying system for traditional Chinese medicine formula granules, characterized in that, It includes a spiral coarse crusher (10), a fine crusher (11), a receiving valve (12), a receiving buffer tank (13), a vacuum feeder (14), a discharger (15), and a collection bin (16) connected in sequence. The feed end of the spiral coarse crusher (10) is connected to the vacuum belt drying system; The bottom of the receiving buffer tank (13) is connected to an air filter (18) via a first pipe (17), and a make-up air valve (19) is provided on the first pipe (17). The bottom of the receiving buffer tank (13) is also connected to a second pipe (21) for connecting to the vacuum feeder (14), and a discharge valve (20) is provided on the second pipe (21). The bottom of the collection bin (16) is provided with a discharge valve (161).

2. The discharge crushing device according to claim 1, characterized in that, The fine pulverizer (11) includes a fine pulverizing motor and pulverizing blades connected thereto. The pulverizing blades use a high-speed rotation method to refine the material.

3. The discharge crushing device according to claim 1, characterized in that, The vacuum feeder (14) is equipped with a feeding vacuum valve (141) and a dust removal backflush valve (142).

4. The discharge crushing device according to claim 1, characterized in that, The top of the collection bin (16) is provided with a discharge sight glass cover (162) to facilitate observation of the material condition inside the collection bin (16).

5. The discharge crushing device according to claim 1, characterized in that, The bottom of the spiral coarse crusher (10) near the discharge end is connected to the feed port of the fine crusher (11).

6. The discharge crushing device according to claim 1, characterized in that, The receiving buffer tank (13) is equipped with a first material level sensing module (131) for real-time monitoring of the material quantity in the tank and controlling the operation of the corresponding valves.

7. The discharge crushing device according to claim 6, characterized in that, The material collection bin (16) is equipped with a second material level sensing module (163) for real-time monitoring of the material quantity in the bin and controlling the operation of the corresponding valves.

8. The discharge crushing device according to claim 7, characterized in that, The first material level sensing module (131) and the second material level sensing module (163) are tuning fork type, capacitive type or radar type material level sensors. Their output signals are connected to the PLC control system and used to control the opening and closing of the unloading valve (20) and the discharge valve (161).

9. The discharge crushing device according to claim 1, characterized in that, The air filter element (18) is a membrane filter cartridge or a sintered metal filter element, with a filtration accuracy of ≤1μm.

10. The discharge crushing device according to claim 1, characterized in that, The discharge end of the spiral coarse crusher (10) and the fine crusher (11) are connected by a flange or quick-release clamp to ensure that the whole machine is in a closed negative pressure state.

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