A kind of metering and packaging equipment and method for preparing traditional Chinese medicine ointment

Abstract

The invention discloses a metering and filling device and method for preparing a traditional Chinese medicine ointment, and relates to the technical field of preparing traditional Chinese medicine ointment. Based on the working principle of conventional extrusion filling, the invention uses an upper fixed block and a lower moving block as a structural basis, and specifically realizes the working purpose of extruding materials in a separated gas-filling and pressurizing manner. The overall structure is relatively simple, and the difficulty of structural movement is reduced. The operation process is combined with the "hydraulic pressure" when injecting raw materials and the air pressure change during active gas injection, and the volume change in two buffer bins and a pressurizing bin is changed by the injected gas volume to realize quantitative discharging. More specifically, the air pressure change during gas injection is further limited, and the two movement processes of the lower moving block are realized, and a relatively small-amplitude movement process is realized, so as to ensure that the traditional Chinese medicine ointment stock solution is discharged in a small dose when it is extruded, and avoid affecting the extrusion volume due to the resistance problem of the stock solution.

Description

Technical Field

[0001] The invention relates to the technical field of preparation of traditional Chinese medicine ointment, and in particular to a metering and packaging device and a method for preparing traditional Chinese medicine ointment. Background Art

[0002] Traditional Chinese medicine ointment is a dosage form obtained by mixing the effective ingredients of various medicinal materials. During its preparation process, auxiliary materials such as lanolin and vaseline are added, resulting in higher viscosity and coagulation power, which will indirectly affect its quantity packaging process. For the packaging process of such semi-fluid media, it is conventional to use equipment such as tail sealing machines. Please refer to the relevant content mentioned in the publication number CN112849460A.

[0003] The viscosity of ointments ranges from 10 to 100 Pa·s, and for dosage forms such as dog skin plasters, the viscosity is even higher. Whether it is packaged in bottles / ointment tubes, or applied quantitatively to non-woven fabrics / pure fabrics, the viscosity of the plaster is relatively high, which increases the friction resistance between the plaster and the inner wall of the structure (such as the inner wall of the material tube). Therefore, the fluidity of the plaster is relatively low and it is easier to adhere to the inner wall of the structure. Therefore, when a quantitative plaster is squeezed out by extrusion or other methods, it is difficult to squeeze out a quantitative ointment if the applied pressure is too low, because the flow of the plaster is "obstructed" and the adhesion rate is too high. On the contrary, if the applied pressure is too high, it will lead to excessive extrusion, resulting in a difference between the actual extrusion amount of the plaster and the preset extrusion amount. Too much will cause waste, and too low will not meet production requirements.

[0004] This application proposes a solution to this problem. Summary of the invention

[0005] The purpose of the present invention is to provide a metering and filling device and method for preparing traditional Chinese medicine ointment. In the filling process of traditional Chinese medicine ointment, because the viscosity of the ointment is relatively large, its flow is hindered and it is more likely to adhere to the inner wall of the structure, which directly affects the actual extrusion amount during the extrusion process.

[0006] The object of the present invention can be achieved by the following technical scheme: a metering and packaging device for preparing Chinese medicine ointment, comprising an outer shell and an injection pipe, wherein the injection pipe is installed at the outer upper end position of the outer shell, and a cooperative component is arranged inside the outer shell, wherein the cooperative component comprises an air pipe assembly, an upper fixed block and a lower moving block, and the air pipe assembly consists of a lower air pipe, an upper air pipe and a blocking needle;

[0007] The upper fixed block and the lower moving block as well as the upper air pipe and the lower air pipe are arranged in a direction from top to bottom, and the upper fixed block and the lower moving block are fixedly connected and slidably connected to the inner wall of the outer shell, the upper end of the upper fixed block and the lower end of the lower moving block are both installed with rubber sleeves, and the upper air pipe and the lower air pipe are fixedly connected to the center point of the rubber sleeves in the corresponding positions;

[0008] The lower moving block and the upper fixed block are slidably connected, and the outer shell is provided with a storage bin and a discharge bin arranged from top to bottom through a cooperative assembly, and a return pipe is installed outside the outer shell, and the two ends of the return pipe are respectively connected with the storage bin and the discharge bin, and the injection pipe is connected with the storage bin, and the upper end of the air pipe assembly passes through to the outer position on the upper side of the outer shell and is provided with an air nozzle sleeve, and the air nozzle sleeve is used to connect the pneumatic assembly.

[0009] It is further configured as follows: the upper air pipe and the upper fixed block, the lower air pipe and the lower moving block are slidably connected, and a connecting spring is arranged on the outer position of the upper air pipe corresponding to the middle of the upper fixed block and the lower moving block.

[0010] It is further configured that: the middle area between the upper fixed block and the lower movable block is configured as a boosting chamber, and the inner position of the rubber sleeve corresponding to the upper position of the upper fixed block is configured as a primary buffer chamber, and the inner position of the rubber sleeve corresponding to the lower position of the lower movable block is configured as a secondary buffer chamber.

[0011] It is further configured as follows: a middle air port is provided at an external position of the upper air pipe corresponding to the boosting bin, an upper air port is provided at an external position of the upper air pipe corresponding to the first-level buffer bin, and a lower air port is provided at an external position of the lower air pipe corresponding to the second-level buffer bin.

[0012] It is further configured as follows: an initial setting position of the upper fixed block is lower than an upper end position of the return pipe, and an initial setting position of the lower moving block is higher than a lower end position of the return pipe.

[0013] It is further configured as follows: the upper air pipe is fixedly connected to the upper end of the outer shell, a blocking needle is installed at the lower end of the lower air pipe, a discharge port is provided at the lower end of the outer shell, and the outer diameter of the blocking needle is equal to the inner diameter of the discharge port.

[0014] The metering and filling equipment includes the following processes during operation:

[0015] Injection pre-pressure stage: In the state of the initial position of the lower moving block, the Chinese medicine ointment stock liquid is replenished to the storage bin through the injection pipe until the discharge bin is completely filled. During the replenishment action, the air nozzle sleeve is used to perform a pressure replenishment action in the primary buffer bin and the secondary buffer bin. During the pressure replenishment action, the volume of the primary buffer bin and the secondary buffer bin does not change;

[0016] Pressurized discharging stage: It is carried out after the pre-pressurization stage of injection is completed, and the Chinese medicine ointment stock solution is continuously injected through the injection pipe. The Chinese medicine ointment stock solution squeezes the rubber sleeve, and the volume of the first-level buffer bin is slightly reduced, and the volume of the second-level buffer bin is greatly reduced. The upper air pipe does not move vertically, and the lower air pipe moves vertically from bottom to top to expose the material port at the lower end of the outer shell, and the lower moving block partially blocks the lower end of the return pipe. Finally, the air nozzle sleeve is used to pressurize the second-level buffer bin and the pressurization bin, driving the lower moving block to move downward to squeeze out the Chinese medicine ointment stock solution in the discharging bin;

[0017] Pressure change reset stage: It is carried out after the extrusion and discharging stage is completed. First, the pressure supplement and pressure boost actions are stopped. Under the action of the connecting spring, the lower moving block performs a reset action from bottom to top relative to the upper fixed block, and continues to perform the supplementary action to accelerate the speed of the Chinese medicine ointment concentrate from the storage bin to the discharging bin, and continue to perform the pressure supplement action to achieve the volume reset of the secondary buffer bin.

[0018] The present invention has the following beneficial effects:

[0019] 1. For the extrusion action in the process of packaging Chinese medicine ointment, the pneumatic method is used as the basis. Specifically, the lower moving block and the upper fixed block are the key structures. The overall structure is relatively simple and will not increase the difficulty of operation. Specifically, the vertical movement of the lower moving block is realized by combining the change of air pressure, so as to squeeze out the Chinese medicine ointment liquid inside the discharge bin. More specifically, the overall extrusion process is mainly based on the rubber sleeve at the lower side of the lower moving block, and the rubber sleeve, a flexible structure, forms a "small amplitude discharge". The purpose is to overcome the abnormal influence caused by the resistance of the ointment liquid by "small amplitude movement";

[0020] 2. In combination with the above content, it should be explained that the upper fixed block is a fixed structure, and cooperates with the rubber sleeve on it to realize the volume change in the storage bin, and also has the purpose of "flexible variable". Its purpose is to cooperate with the discharging process in the discharging bin, so that a separated air replenishment and pressurization method is added to the overall structure, combined with the "hydraulic pressure" when injecting raw materials and the air pressure change during active air injection, the volume change in the two buffer bins and the pressurization bin is changed by the injected gas volume to realize quantitative discharging, thereby achieving the purpose of quantitative discharging. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1This is a schematic diagram of the structure of a metering and packaging device for preparing traditional Chinese medicine ointment proposed by the present invention;

[0023] Figure 2 A cross-sectional view of an outer shell of a metering and filling device for preparing a traditional Chinese medicine ointment proposed by the present invention;

[0024] Figure 3 The present invention provides a metering and packaging device for preparing Chinese medicine ointment. Figure 1 A cross-sectional view of

[0025] Figure 4 This is a disassembled diagram of a cooperative component in a metering and filling device for preparing traditional Chinese medicine ointment proposed by the present invention;

[0026] Figure 5 A cross-sectional view of a cooperative component in a metering and filling device for preparing a traditional Chinese medicine ointment proposed by the present invention;

[0027] Figure 6 The present invention provides a metering and packaging device for preparing Chinese medicine ointment. Figure 5 Front view of .

[0028] In the figure: 1. outer shell; 2. return pipe; 3. air nozzle sleeve; 4. injection pipe; 5. air pipe assembly; 501. lower air pipe; 502. upper air pipe; 6. upper fixed block; 7. lower moving block; 8. blocking needle; 9. connecting spring; 10. rubber sleeve; 11. upper air port; 12. middle air port; 13. lower air port. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1: The packaging process of Chinese medicine ointment is to extrude a quantitative ointment into a packaging container. However, due to the high viscosity of the ointment, the friction resistance between the ointment and the inner wall of the structure is increased. For this, the applied pressure needs to be increased. However, if the applied pressure is too low, it is difficult to extrude the quantitative ointment. On the contrary, if the applied pressure is too high, the extrusion amount will be too much, resulting in a difference between the actual extrusion amount of the ointment and the preset extrusion amount. Too much will cause waste, and too low will not meet the production requirements. The following technical solutions are proposed:

[0031] Reference Figures 1 to 6In this embodiment, a metering and packaging device for preparing Chinese medicine ointment includes an outer shell 1 and an injection tube 4, the injection tube 4 is installed at the outer upper end position of the outer shell 1, and a cooperative component is arranged inside the outer shell 1, the cooperative component includes an air pipe assembly 5, an upper fixed block 6 and a lower moving block 7, and the air pipe assembly 5 is composed of a lower air pipe 501, an upper air pipe 502 and a blocking needle 8;

[0032] The upper fixed block 6 and the lower moving block 7 as well as the upper air pipe 502 and the lower air pipe 501 are arranged in a direction from top to bottom, and the upper fixed block 6 and the lower moving block 7 are fixedly connected and slidably connected to the inner wall of the outer shell 1. The upper end of the upper fixed block 6 and the lower end of the lower moving block 7 are both installed with rubber sleeves 10, and the upper air pipe 502 and the lower air pipe 501 are fixedly connected to the center point of the rubber sleeve 10 in the corresponding position;

[0033] The lower moving block 7 is slidably connected to the upper fixed block 6. The outer shell 1 is provided with a storage bin and a discharge bin arranged from top to bottom through a cooperative assembly, and a return pipe 2 is installed on the outside of the outer shell 1. The two ends of the return pipe 2 are respectively connected to the storage bin and the discharge bin, and the injection pipe 4 is connected to the storage bin. The upper end of the air pipe assembly 5 passes through the upper external position of the outer shell 1 and is provided with an air nozzle sleeve 3. The air nozzle sleeve 3 is used to connect the pneumatic components. The upper air pipe 502 and the upper fixed block 6, and the lower air pipe 501 and the lower moving block 7 are slidably connected. A connecting spring 9 is provided on the upper air pipe 502 at an external position corresponding to the middle of the upper fixed block 6 and the lower moving block 7.

[0034] Working principle: The structure proposed in this invention is only used as the extrusion process of Chinese medicine ointment packaging, and the related equipment is not explained. Figure 1 and Figure 2 To explain: the Chinese medicine ointment concentrate is squeezed from the injection tube 4 into the storage bin in the outer shell 1, but because a return tube 2 is provided, the concentrate in the storage bin can also be gathered into the discharge bin, so it can be understood that: by continuing to squeeze the concentrate into the storage bin, the concentrate can also be squeezed out from the lower end of the outer shell 1, but there is a pressure change when the concentrate is injected, which affects the concentrate extrusion process. In this regard, the present invention is significantly different from the conventional extrusion method in that: after the concentrate completely fills the storage bin and the discharge bin, the pressure when the concentrate is injected is not used as the power, but the air pipe assembly 5 is used for air supplement and pressurization. The injected gas will not directly affect the concentrate, and specifically, this is used as the power to realize the vertical movement of the lower moving block 7, so that flexible discharging is performed based on the rubber sleeve 10 on the lower side of the lower moving block 7. The overall discharging process is relatively slow, and the discharge amount can be controlled by actively controlling the amount of gas in the air supplement and pressurization action.

[0035] Embodiment 2: The deformation process of the lower moving block and the two rubber sleeves in Embodiment 1 is explained:

[0036] The middle area between the upper fixed block 6 and the lower moving block 7 is set as a boosting bin, and the inner position of the rubber sleeve 10 corresponding to the upper position of the upper fixed block 6 is set as a first-level buffer bin, and the inner position of the rubber sleeve 10 corresponding to the lower position of the lower moving block 7 is set as a second-level buffer bin. A middle air port 12 is provided at the outer position of the upper air pipe 502 corresponding to the boosting bin, and an upper air port 11 is provided at the outer position of the upper air pipe 502 corresponding to the first-level buffer bin, and a lower air port 13 is provided at the outer position of the lower air pipe 501 corresponding to the second-level buffer bin. The initial setting position of the upper fixed block 6 is lower than the upper end position of the return pipe 2, and the initial setting position of the lower moving block 7 is higher than the lower end position of the return pipe 2. The upper air pipe 502 is fixedly connected to the upper end position of the outer shell 1, and a blocking needle 8 is installed at the lower end of the lower air pipe 501, and a discharge port is provided at the lower end position of the outer shell 1. The outer diameter of the blocking needle 8 is equal to the inner diameter of the discharge port.

[0037] Combined with the relevant content in Example 1 and Figure 3 The following instructions are given:

[0038] S1: Combined with the initial positions of the upper fixed block 6 and the lower movable block 7, when the two rubber sleeves 10 are fully expanded by air, the blocking needle 8 at the lower position of the rubber sleeve 10 completely blocks the lower position of the outer shell 1, thereby preventing the original liquid in the discharge bin from being accidentally discharged;

[0039] S2: Combined with S1, when the amount of raw liquid in the discharge bin is large, it will provide upward pressure to the rubber sleeve 10 on the lower moving block 7, causing the blocking needle 8 to move upward and expose the lower side of the outer shell 1;

[0040] S3: Combining S1 and S2 again, if the original liquid is continuously injected into the storage bin, the two rubber sleeves 10 will both be compressed and deformed. However, the key to the present invention is to drive the lower moving block 7 to move downward to extrude the material by actively replenishing air and increasing pressure. Specifically, the lower moving block 7 does not completely block the lower side of the return pipe 2, and it is also necessary to ensure that the blocking needle 8 is separated from the material port at the lower side of the outer shell 1. For this purpose, it is necessary to slightly reduce the amount of air in the secondary buffer bin to move the blocking needle 8 upward and extrude the material through the movement of the lower moving block 7.

[0041] Embodiment 3: The overall operation process is explained in combination with Embodiment 1 and Embodiment 2:

[0042] The operation of the metering and filling equipment includes the following processes:

[0043] Injection pre-pressure stage: In the state where the lower moving block 7 is in the initial position, the injection pipe 4 is used to replenish the storage bin with the Chinese medicine ointment stock solution until the discharge bin is completely filled. During the replenishment action, the air nozzle sleeve 3 is used to perform a pressure replenishment action in the primary buffer bin and the secondary buffer bin. During the pressure replenishment action, the volumes of the primary buffer bin and the secondary buffer bin do not change;

[0044] Pressurized discharging stage: It is carried out after the pre-pressurization stage of injection is completed, and the Chinese medicine ointment stock solution is continuously injected through the injection pipe 4, and the Chinese medicine ointment stock solution squeezes the rubber sleeve 10, the volume of the primary buffer bin is slightly reduced, and the volume of the secondary buffer bin is greatly reduced, the upper air pipe 502 does not vertically displace, and the lower air pipe 501 is vertically displaced from bottom to top to expose the material port at the lower end of the outer shell 1, and the lower moving block 7 partially blocks the lower end of the return pipe 2, and finally the secondary buffer bin and the pressurization bin are pressurized through the air nozzle sleeve 3, driving the lower moving block 7 to move downward, and the Chinese medicine ointment stock solution in the discharging bin is squeezed out;

[0045] Pressure change reset stage: It is carried out after the extrusion and discharging stage is completed. First, the pressure supplement and pressurization actions are stopped. Under the action of the connecting spring 9, the lower moving block 7 performs a reset action from bottom to top relative to the upper fixed block 6, and continues to perform the supplementary action to accelerate the speed of the Chinese medicine ointment concentrate from the storage bin to the discharging bin, and continue to perform the pressure supplement action to realize the volume reset of the secondary buffer bin.

[0046] Solution description: The present invention specifically uses the lower moving block 7 and the upper fixed block 6 as key structures, which are explained in conjunction with the second embodiment. During operation, the discharge mode is specifically changed by controlling the change in gas volume. When the lower moving block 7 and the upper fixed block 6 are in the initial position, the injection pre-pressing is first performed, the purpose of which is to ensure that the two rubber sleeves 10 are fully expanded under pressure, but will also be subject to the pressure from the stock liquid, so that when the stock liquid completely fills the storage bin and the discharge bin, the initial amount of the stock liquid can be directly obtained by calculating the volume;

[0047] Then, the stock liquid is continuously injected. During this process, the stock liquid amount in the storage bin and the discharge bin is higher than the initial amount, so that both rubber sleeves 10 are deformed under pressure. However, because the upper air pipe 502 is fixedly connected, the rubber sleeve 10 at the upper side is slightly less deformed or even does not deform. The key lies in the rubber sleeve 10 at the lower side. When the rubber sleeve 10 is deformed, the lower air pipe 501 also moves upward slightly, so that the stock liquid in the storage bin continues to be injected into the discharge bin.

[0048] In addition, it should be noted that: it is necessary to further limit the setting position of the lower air port 13, wherein the upper air port 11 and the middle air port 12 always maintain a ventilated state, and the only difference is that: after the lower air pipe 501 moves upward for a distance, the lower air port 13 is completely blocked by the lower moving block 7, so that the secondary buffer bin is independently separated, but when the gas continues to be filled, because the rubber sleeve 10 at the upper position is simultaneously subjected to the pressure of the raw liquid and the gas, the volume change of the primary buffer bin is small or even unchanged, so that the gas that continues to be filled mainly goes to the boosting bin, which causes the lower moving block 7 to move downward corresponding to the upper fixed block 6, and the lower moving block 7 squeezes out the raw liquid in the bin, but in this process, the secondary buffer bin will continue to be in a state of compression deformation and shrinkage due to the increased pressure on the outside of the rubber sleeve 10 at this position, so that the blocking needle 8 continues to show a trend of moving upward when the lower moving block 7 moves upward, so that the operation process of the overall structure can be understood as: the amount of raw liquid extruded can be reversely controlled by controlling the amount of gas filled;

[0049] It is also necessary to further explain that: the lower air pipe 501 and the upper air pipe 502 maintain a sliding connection, so when the lower air port 13 is completely blocked and as the gas is continuously replenished, the lower air pipe 501 is subjected to downward pressure and tends to move downward. To summarize, when limiting the amount of gas injected, it is also necessary to further coordinate the replenishment process of the raw liquid and the speed of injecting gas. The purpose is to squeeze out the raw liquid in a relatively small manner and reduce the influence of the raw liquid resistance on the discharge process.

[0050] In summary: Based on the working principle of conventional extrusion filling, the present invention uses the upper fixed block and the lower moving block as the structural basis, and specifically achieves the working purpose of extrusion by means of separation, gas supplementation and pressurization. The overall structure is relatively simple, which reduces the difficulty of structural movement. The operation process is combined with the "hydraulic pressure" when injecting raw materials and the air pressure change during active gas injection. The volume change in the two buffer bins and the boosting bin is changed by the injected gas volume to achieve quantitative discharging. More specifically, it is to further limit the air pressure change during gas injection, realize the two movement processes of the lower moving block, and realize a relatively small movement process, so as to ensure that the Chinese medicine ointment concentrate is discharged in a small dose when extruding, so as to avoid the extrusion amount being affected by the resistance problem of the concentrate.

[0051] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0053] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A metering and packaging method for preparing a traditional Chinese medicine ointment, using a metering and packaging device, the metering and packaging device comprising an outer shell (1) and a material injection pipe (4), characterized in that: The injection pipe (4) is installed at the upper end of the outer shell (1). A cooperating assembly is arranged inside the outer shell (1). The cooperating assembly includes an air pipe assembly (5), an upper fixed block (6) and a lower moving block (7). The air pipe assembly (5) is composed of a lower air pipe (501), an upper air pipe (502) and a blocking needle (8). The upper fixed block (6) and the lower moving block (7) as well as the upper air pipe (502) and the lower air pipe (501) are arranged in a direction from top to bottom, and the upper fixed block (6) and the lower moving block (7) are fixedly connected and slidably connected to the inner wall of the outer shell (1), the upper end of the upper fixed block (6) and the lower end of the lower moving block (7) are both provided with a rubber sleeve (10), the upper air pipe (502) and the lower air pipe (501) are fixedly connected to the center point of the rubber sleeve (10) at the corresponding position, and the upper air pipe (502) and the lower air pipe (501) are slidably connected to each other; The lower moving block (7) and the upper fixed block (6) are slidably connected, the outer shell (1) is provided with a storage bin and a discharge bin arranged from top to bottom through a cooperative component, and a return pipe (2) is installed outside the outer shell (1), and the two ends of the return pipe (2) are respectively connected to the storage bin and the discharge bin, and the injection pipe (4) is connected to the storage bin. The upper end of the air pipe assembly (5) passes through the upper outer side of the outer shell (1) and is provided with an air nozzle sleeve (3), and the air nozzle sleeve (3) is used to connect the pneumatic component; The middle area between the upper fixed block (6) and the lower moving block (7) is set as a boosting chamber, and the inner position of the rubber sleeve (10) at the upper side position of the upper fixed block (6) is set as a first-level buffer chamber, and the inner position of the rubber sleeve (10) at the lower side position of the lower moving block (7) is set as a second-level buffer chamber, the upper air pipe (502) is provided with a middle air port (12) at an outer position corresponding to the boosting chamber, and the upper air pipe (502) is provided with an upper air port (11) at an outer position corresponding to the first-level buffer chamber, and the lower air pipe (501) is provided with a lower air port (13) at an outer position corresponding to the second-level buffer chamber; The metering and filling equipment includes the following processes during operation: Injection pre-pressure stage: in the state where the lower fixed block (7) is in the initial position, the injection pipe (3) is used to replenish the storage bin with the Chinese medicine ointment concentrate until the discharge bin is completely filled. During the replenishment action, the air nozzle sleeve (3) is used to simultaneously perform a pressure replenishment action on the primary buffer bin and the secondary buffer bin. During the pressure replenishment action, the volumes of the primary buffer bin and the secondary buffer bin do not change; Pressurized discharge stage: This is carried out after the injection pre-pressurization stage is completed, and the Chinese medicine ointment stock solution continues to be injected through the injection pipe (3). The Chinese medicine ointment stock solution squeezes the rubber sleeve (10), the volume of the first buffer bin is slightly reduced, the volume of the second buffer bin is greatly reduced, the upper air pipe (502) does not move vertically, the lower air pipe (503) moves vertically from bottom to top to expose the material port at the lower end of the outer shell (1), and the lower moving block (7) partially blocks the lower end of the return pipe (2). Finally, the air nozzle sleeve (3) pressurizes the second buffer bin and the pressurization bin, driving the lower moving block (7) to move downward, and the Chinese medicine ointment stock solution in the discharge bin is squeezed out; The pressure change reset stage is carried out after the extrusion discharge stage is completed. First, the pressure replenishment action and the pressure increase action are stopped. Under the action of the connecting spring (9), the lower moving block (7) performs a reset action from bottom to top relative to the upper push block (6), and continues to perform the replenishment action to accelerate the speed of the Chinese medicine ointment concentrate entering the discharge bin from the storage bin, and continues to perform the pressure replenishment action to achieve the volume reset of the secondary buffer bin.

2. A metering and packaging method for preparing a traditional Chinese medicine ointment according to claim 1, characterized in that: The upper air pipe (502) and the upper fixed block (6), and the lower air pipe (501) and the lower movable block (7) are slidably connected, and a connecting spring (9) is provided at an outer position of the upper air pipe (502) corresponding to the middle of the upper fixed block (6) and the lower movable block (7).

3. A metering and packaging method for preparing a traditional Chinese medicine ointment according to claim 1, characterized in that: The initial setting position of the upper fixed block (6) is lower than the upper end position of the return pipe (2), and the initial setting position of the lower movable block (7) is higher than the lower end position of the return pipe (2).

4. A metering and packaging method for preparing a traditional Chinese medicine ointment according to claim 1, characterized in that: The upper air pipe (502) is fixedly connected to the upper end of the outer shell (1); a blocking needle (8) is installed at the lower end of the lower air pipe (502); a material outlet is provided at the lower end of the outer shell (1); and the outer diameter of the blocking needle (8) is equal to the inner diameter of the material outlet.

Images