Material metering device for production of ripdicaine emulsifiable paste

Abstract

The utility model discloses a material metering device for production of riptacaine cream, which comprises an outer shell, a weighing mechanism, a material metering bin, a feed pipe, a feed valve, a discharge pipe, a discharge valve and an extrusion discharge mechanism, a cavity is arranged in the outer shell, and the weighing mechanism is mounted in the cavity of the outer shell; the material measuring bin is arranged on the weighing mechanism, and a feeding port is formed in the position, located in the cavity of the outer shell, above the material measuring bin. The feeding pipe is mounted on the outer shell, and the feeding pipe extends to the position above the material measuring bin; the feeding valve is mounted on the feeding pipe, and the feeding valve is suitable for controlling feeding of the feeding pipe; the discharging pipe is mounted at the bottom of the material measuring bin, and the discharging pipe is communicated with the material measuring bin; and the discharge valve is mounted on the discharge pipe. The riptacaine cream weighing device can meter and weigh riptacaine cream in a clean environment.

Description

Technical Field

[0001] The utility model relates to a material metering device for producing leprocaine cream, belonging to the technical field of metering devices. Background Art

[0002] At present, leprocaine is a commonly used local anesthetic, widely used in clinical medicine, especially in minor skin surgery, pain relief, etc. With the increase in medical needs, the demand for leprocaine cream is also growing. In the production process of leprocaine cream, accurate measurement of various materials is a key link to ensure product quality.

[0003] After searching the prior art, it was found that a Chinese patent with publication number CN213932779U disclosed an automatic weighing and metering device for pastes. However, during use, it was found that the patent used an open weighing device, which was easily contaminated by the external environment. Summary of the invention

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a material metering device for producing leprocaine cream, which can measure and weigh the leprocaine cream in a clean environment.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a material metering device for producing leprocaine cream, comprising:

[0006] An outer shell, wherein a chamber is provided in the outer shell;

[0007] A weighing mechanism, the weighing mechanism being installed in the cavity of the outer shell;

[0008] A material measuring bin, which is arranged on the weighing mechanism and is located in the cavity of the outer shell. A feeding port is arranged above the material measuring bin and the material measuring bin is arranged in the cavity of the outer shell;

[0009] A feed pipe, the feed pipe is mounted on the outer shell, and the feed pipe extends to the top of the material metering bin;

[0010] A feed valve, the feed valve is mounted on the feed pipe, and the feed valve is suitable for controlling the feed of the feed pipe;

[0011] A discharge pipe, the discharge pipe is installed at the bottom of the material metering bin, and the discharge pipe is connected to the material metering bin;

[0012] A discharge valve, the discharge valve is installed on the discharge pipe, and the discharge valve is suitable for controlling the discharge of the discharge pipe;

[0013] The weighing mechanism is suitable for weighing the material measuring bin and the material in the material measuring bin;

[0014] The extrusion discharging mechanism comprises:

[0015] An extrusion drive source, the extrusion drive source is fixed to the outer shell, the extrusion drive source is provided with a piston rod extending into the outer shell, and the piston rod is provided with a telescopic drive end;

[0016] A pressure plate, the pressure plate is fixed on the telescopic driving end of the piston rod, the pressure plate is located above the material metering bin, and the outer peripheral surface of the pressure plate is suitable for forming a tight fit with the inner wall surface of the material metering bin;

[0017] The pressure plate is provided with a discharge hole;

[0018] The feed pipe is suitable for passing through the discharge hole of the pressure plate;

[0019] A discharge hole opening and closing mechanism, the discharge hole opening and closing mechanism is mounted on the pressure plate, and the discharge hole opening and closing mechanism is suitable for closing the discharge hole when the feed pipe is separated from the discharge hole of the pressure plate;

[0020] The extrusion driving source is suitable for driving the pressure plate to move downward, enter the material metering bin, squeeze the material in the material metering bin and discharge it through the discharge pipe.

[0021] Further, in order to realize the discharging and conveying, the material metering device for producing the levocaine cream further includes a discharging and conveying mechanism, and the discharging and conveying mechanism includes:

[0022] A conveying shell, wherein the conveying shell is provided with a feed opening suitable for receiving the discharge of the discharge pipe, and the feed opening is arranged in the outer shell;

[0023] A conveying screw rod, the conveying screw rod being rotatably mounted in the conveying housing;

[0024] A rotation driving source is installed at one end of the conveying shell, and the rotation driving source is provided with an output end, and the output end is connected to one end of the conveying screw rod, and the rotation driving source is suitable for driving the conveying screw rod to rotate.

[0025] Furthermore, a specific type of rotational drive source is provided, wherein the rotational drive source is a servo motor.

[0026] Furthermore, in order to filter the material entering the feed pipe, the material metering device for producing leprocaine cream also includes a filter screen, which is installed at the inlet of the feed pipe.

[0027] Further, in order to be able to close the discharge hole of the pressure plate, the discharge hole opening and closing mechanism includes:

[0028] A telescopic driving source, the telescopic driving source is mounted on the pressure plate, and the telescopic driving source is provided with a telescopic end;

[0029] A rotary cavity is provided in the pressure plate, and the rotary cavity is connected to the discharge hole of the pressure plate;

[0030] A discharge hole blocking block, wherein the discharge hole blocking block is movably installed in the rotary cavity;

[0031] A hinged rod, the hinged rod is rotatably disposed in the pressure plate, one end of the hinged rod extends out of the outer surface of the pressure plate, called the outer end, and the other end extends into the rotating cavity, called the inner end;

[0032] A swing connecting rod, one end of which is fixedly connected to the inner end of the hinge rod, and the other end of which is connected to the side surface of the discharge hole blocking block;

[0033] A driving connecting rod, one end of which is fixedly connected to the outer end of the hinged rod, and the other end of which is hinged to the telescopic end of the telescopic driving source;

[0034] The telescopic driving source is suitable for driving the swing connecting rod to swing through the driving connecting rod, so that the discharge hole blocking block opens and closes the discharge hole.

[0035] Furthermore, in order to facilitate the introduction of the pressure plate into the material metering bin, a guide structure suitable for the introduction of the pressure plate is provided on the inner wall of the feeding port above the material metering bin.

[0036] Further, in order to be able to adjust the temperature, the material metering device for producing the leprocaine cream also includes a constant temperature structure, and the constant temperature structure includes:

[0037] A temperature detection sensor, the temperature detection sensor is installed in the outer shell, and the temperature detection sensor is suitable for detecting the temperature inside the outer shell;

[0038] A semiconductor refrigeration chip, which is mounted on the outer shell and is suitable for adjusting the temperature inside the outer shell;

[0039] A controller is electrically connected to the temperature detection sensor and the semiconductor refrigeration chip respectively. The controller is provided with a preset temperature. The controller is suitable for obtaining the temperature of the temperature detection sensor and controlling the semiconductor refrigeration chip according to the preset temperature to adjust the temperature inside the outer shell.

[0040] Further, in order to ensure dust-free sanitation of the gap between the outer shells, the material metering device for producing the leprocaine cream also includes a negative pressure cleaning device, and the negative pressure cleaning device includes:

[0041] A vacuum generator, the vacuum generator is installed outside the outer shell, the vacuum generating device is provided with a negative pressure pipeline, and the negative pressure pipeline is connected to the chamber of the outer shell;

[0042] A dust collector is installed on the negative pressure pipeline, and the dust collector is suitable for filtering and collecting the extracted dust particles.

[0043] By adopting the above technical solution, the utility model has the following beneficial effects:

[0044] In the utility model, first, in the feeding stage, the discharge valve of the discharge pipe is closed and the feed valve of the feed pipe is opened, and the material begins to be transported into the material metering bin. The weighing mechanism monitors the material weight in real time, and when the preset target value is reached, the feed valve is closed. Subsequently, in the discharging stage, the discharge valve of the discharge pipe is opened, and the pressure plate, which is initially kept in a separated state, is driven downward by the extrusion drive source, and begins to contact and enter the material metering bin to squeeze out the material in the material metering bin. During the downward movement, the activation of the extrusion discharge mechanism ensures that the discharge hole on the pressure plate is closed to prevent the material from leaking from the discharge hole, thereby ensuring the integrity and smoothness of the entire discharge process. The entire weighing and extrusion process is completed in a closed outer shell, thus maintaining the hygiene and pollution-free nature of the material throughout the production process.

[0045] In order to ensure the continuity and stability of the discharging and conveying process, a servo motor-driven conveying screw is added, which not only improves the efficiency of discharging, but also enhances the controllability of the conveying process. In addition, the filter installed at the inlet of the feed pipe ensures the purity of the material, effectively filters out possible impurities, and reduces the risk of material contamination.

[0046] In summary, the utility model not only ensures accurate measurement and high sanitation standards in the production process of leprocaine cream, but also realizes sealed transportation throughout the whole process, thus improving the overall quality of production. It ensures the cleanliness of the pharmaceutical environment and the quality and safety of the products, and provides an efficient, economical and hygienic production environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 This is a schematic diagram of the structure of a material metering device for producing leprocaine cream according to the utility model;

[0048] Figure 2 The cross-sectional structure of the material metering device for the production of leprocaine cream of the utility model is shown in FIG. Figure 1 ;

[0049] Figure 3 The cross-sectional structure of the material metering device for the production of leprocaine cream of the utility model is shown in FIG. Figure 2 . DETAILED DESCRIPTION

[0050] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0051] Example 1

[0052] like Figure 1-3 As shown, a material metering device for producing levocaine cream comprises:

[0053] Outer shell 10;

[0054] A weighing mechanism 20, the weighing mechanism 20 is installed in the outer shell 10;

[0055] The material metering bin 30 is arranged on the weighing mechanism 20 and is located in the chamber of the outer shell 10. A feeding port is arranged above the material metering bin 30;

[0056] A feed pipe 40, which is mounted on the outer shell 10 and extends to the top of the material metering bin 30;

[0057] A feed valve 50, the feed valve 50 is installed on the feed pipe 40, and the feed valve 50 is suitable for controlling the feed of the feed pipe 40;

[0058] A discharge pipe 60, which is installed at the bottom of the material metering bin 30, and is connected to the material metering bin 30;

[0059] A discharge valve 70, the discharge valve 70 is installed on the discharge pipe 60, and the discharge valve 70 is suitable for controlling the discharge of the discharge pipe 60;

[0060] The weighing mechanism 20 is suitable for weighing the material measuring bin 30 and the material in the material measuring bin 30;

[0061] Extrusion discharging mechanism, the extrusion discharging mechanism includes:

[0062] An extrusion driving source 80, the extrusion driving source 80 is fixed on the outer shell 10, and the extrusion driving source 80 is provided with a piston rod 81 extending into the material metering bin 30, and the piston rod 81 is provided with a telescopic driving end;

[0063] The pressure plate 90 is fixed on the telescopic driving end of the piston rod 81. The pressure plate 90 is located above the material metering bin 30. The outer peripheral surface of the pressure plate is suitable for forming a close fit with the inner wall surface of the material metering bin 30.

[0064] The pressure plate 90 is provided with a discharge hole;

[0065] The feed pipe 40 is adapted to pass through the discharge hole of the pressure plate 90;

[0066] A discharge hole opening and closing mechanism, the discharge hole opening and closing mechanism is installed on the pressure plate 90, and the discharge hole opening and closing mechanism is suitable for closing the discharge hole when the feed pipe 40 is separated from the discharge hole of the pressure plate 90;

[0067] The extrusion driving source 80 is suitable for driving the pressure plate 90 to move downward, enter the material metering bin 30 , squeeze the material in the material metering bin 30 and discharge it through the discharge pipe 60 .

[0068] In this embodiment, if Figure 1 As shown, first, in the feeding stage, the discharge valve 70 controlling the discharge pipe 60 is closed, and the feed valve 50 controlling the feed pipe 40 is opened, and the material begins to be transported into the material metering bin 30. The weighing mechanism 20 monitors the material weight in real time, and when the preset target value is reached, the feed valve 50 is closed. Subsequently, in the discharging stage, the discharge valve 70 controlling the discharge pipe 60 is opened, and the extrusion drive source 80 drives the pressure plate 90 to move downward, thereby squeezing out the material in the material metering bin 30. During the downward movement, the activation of the extrusion discharge mechanism will ensure that the discharge hole on the pressure plate 30 is closed to prevent the material from leaking from the discharge hole, thereby ensuring the integrity and smoothness of the entire discharge process. The entire weighing and extrusion process is completed in the closed outer shell 10, which keeps the material hygienic and pollution-free throughout the production process. The discharge valve can be a wireless valve with self-power and remote control, which can reduce the impact on weighing, and the extrusion drive source 800 can be a cylinder.

[0069] The bottom of the material metering bin 30 is inclined toward the discharge pipe 60 to facilitate discharge.

[0070] Specifically, Figure 1 As shown, the material metering device for producing leprocaine cream also includes a material discharging conveying mechanism, and the material discharging conveying mechanism can be the following structure, including:

[0071] A conveying housing 100, wherein a feed opening suitable for receiving the discharge of the discharge pipe 60 is provided on the conveying housing 100, and the feed opening is arranged in the outer housing 10;

[0072] A conveying screw rod 110, the conveying screw rod 110 is rotatably installed in the conveying housing 100;

[0073] The rotary driving source is installed at one end of the conveying shell 100 . The rotary driving source is provided with an output end, which is connected to one end of the conveying screw rod 110 . The rotary driving source is suitable for driving the conveying screw rod 110 to rotate.

[0074] Specifically, the rotation drive source is a servo motor.

[0075] In this embodiment, if Figure 1 As shown, the conveying housing 100 is partially disposed in the outer housing 10, and a feed opening is provided thereon for receiving the material discharged from the discharge pipe 60. The feed opening is disposed in the outer housing 10 to facilitate docking with the discharge pipe 60. When the conveying screw rod 110 rotates, the material entering the conveying housing 100 can be conveyed along the length direction of the conveying housing 100.

[0076] When the material is discharged from the material metering bin 30 through the discharge pipe 60, it will enter the feed opening of the conveying housing 100. At this time, the rotary drive source drives the conveying screw 110 to rotate, and the conveying screw 110 will convey the material entering the conveying housing 100 along the length direction of the conveying housing 100, thereby realizing the collection and transportation of the material.

[0077] Specifically, Figure 1 As shown, the material metering device for producing leprocaine cream also includes a filter screen, which is installed at the inlet of the feed pipe 40.

[0078] In this embodiment, if Figure 1 As shown, the function of the filter is to filter the impurities that may exist in the material entering the feed pipe 40. When the device is used to produce the leprocaine cream, some larger particles of impurities or other foreign matter may be mixed in the raw materials. If these impurities enter the material metering bin 30, the normal progress of the subsequent process may be affected. Therefore, a filter is set at the entrance of the feed pipe 40 to effectively prevent the entry of larger particles of impurities, thereby ensuring the cleanliness of the material and the quality of the product.

[0079] The filter screen can be a common metal mesh, and the mesh size can be designed according to the minimum particle size to be filtered. The filter screen can be detachably installed, which is convenient for regular cleaning and replacement. In addition, the position of the filter screen can be adjusted according to actual needs, and can be installed not only at the inlet of the feed pipe 40, but also at other suitable positions to achieve the purpose of material filtering.

[0080] Specifically, Figure 1-3 As shown, the discharge hole opening and closing mechanism may be of the following structure, including:

[0081] A telescopic driving source 210, the telescopic driving source 210 is mounted on the pressure plate 90, and a telescopic end is provided on the telescopic driving source 210;

[0082] A rotary cavity is provided in the pressing plate 90, and the rotary cavity is connected to the discharge hole of the pressing plate 90;

[0083] A discharge hole blocking block 220, which is movably installed in the rotary chamber;

[0084] A hinge rod 230, the hinge rod 230 is rotatably disposed in the pressure plate 90, one end of the hinge rod 230 extends out of the outer surface of the pressure plate 90, called the outer end, and the other end extends into the rotating cavity, called the inner end;

[0085] A swing link 240, one end of which is fixedly connected to the inner end of the hinge rod 230, and the other end of which is connected to the side of the discharge hole blocking block;

[0086] A driving connecting rod 250, one end of which is fixedly connected to the outer end of the hinge rod 230, and the other end of which is hinged to the telescopic end of the telescopic driving source 210;

[0087] The telescopic driving source 210 is suitable for driving the swing connecting rod 240 to swing through the driving connecting rod 250, so that the discharge hole blocking block 220 opens and closes the discharge hole.

[0088] In this embodiment, if Figure 1 As shown, the telescopic driving source 210 is installed on the pressure plate 90, and provides a driving force for opening and closing the discharge hole through the telescopic end. The telescopic driving source 210 can be specifically a micro electric telescopic cylinder.

[0089] The telescopic driving source 210 telescopically moves, drives the hinge rod 230 to rotate through the driving connecting rod 250, and then drives the discharge hole blocking block 220 to swing through the swing connecting rod 240, thereby opening and closing the discharge hole. When the discharge hole is in an open state, the material can be discharged from the material metering bin 30; when the discharge hole is closed, the material can be prevented from being discharged.

[0090] Specifically, Figure 1-3 As shown, a guide structure suitable for introducing the pressure plate 90 is provided on the inner wall of the feeding port above the material metering bin 30 .

[0091] In this embodiment, if Figure 1 As shown, the function of the guide structure is to guide the pressure plate 90 to accurately enter the material metering bin 30.

[0092] When measuring materials, the pressure plate 90 needs to descend into the material measuring bin 30 after the material measuring is completed to squeeze and discharge the materials in the bin. However, the feeding port of the material measuring bin 30 is narrow. If the pressure plate 90 is tilted when entering, it may get stuck or damage the bin wall, affecting normal operation.

[0093] Therefore, by providing a guide structure on the inner wall of the feeding port, a centering and positioning function can be achieved during the descent of the pressure plate 90, ensuring that the pressure plate 90 can accurately enter along the central axis of the material metering bin 30 to avoid deflection and jamming.

[0094] The guide structure can be a tapered funnel-shaped structure. One end of the funnel-shaped structure is larger to accommodate the initial offset of the pressure plate 90, and the other end gradually shrinks to center the pressure plate 90; the guide rail structure constrains the motion trajectory of the pressure plate 90 through a limiting effect to achieve a guiding effect.

[0095] Specifically, Figure 1 As shown, the material metering device for the production of leprocaine cream also includes a constant temperature structure, which includes:

[0096] A temperature detection sensor is installed in the outer shell 10 and is suitable for detecting the temperature in the outer shell 10;

[0097] A semiconductor refrigeration chip, which is mounted on the outer shell 10 and is suitable for adjusting the temperature inside the outer shell 10;

[0098] The controller is electrically connected to the temperature detection sensor and the semiconductor cooling chip respectively. The controller is provided with a preset temperature. The controller is suitable for obtaining the temperature of the temperature detection sensor and controlling the semiconductor cooling chip according to the preset temperature to adjust the temperature inside the outer shell 10.

[0099] In this embodiment, if Figure 1 As shown, the thermostatic structure is used to control and maintain the temperature inside the outer shell 10 .

[0100] Maintaining proper temperature is critical to the production process because temperature affects the physical and chemical properties of leprocaine and other raw materials, which in turn affects product quality.

[0101] The controller is connected to the temperature sensor and the semiconductor cooling piece, and has a preset target temperature value built in. The controller can compare the actual temperature detected by the temperature sensor with the preset temperature, control the working state of the semiconductor cooling piece, and realize automatic adjustment of the internal temperature of the outer shell 10. The controller can be a single chip microcomputer.

[0102] The temperature sensor continuously monitors the temperature inside the outer shell and feeds the detected value back to the controller. The controller compares the detected temperature with the preset temperature. If the detected temperature is lower than the preset value, the semiconductor cooling chip is controlled to heat; if it is higher than the preset value, it is controlled to cool, thereby accurately maintaining the temperature inside the outer shell within a constant preset temperature range.

[0103] Semiconductor refrigerators determine whether cooling or heating is achieved on the same semiconductor refrigerator by changing the polarity of direct current.

[0104] Example 2

[0105] This embodiment is basically the same as Embodiment 1, except that:

[0106] Specifically, Figure 1 As shown, the material metering device for producing leprocaine cream further includes a negative pressure cleaning device 300, and the negative pressure cleaning device 300 may have the following structure, including:

[0107] A vacuum generator is installed outside the outer shell 10. The vacuum generating device is provided with a negative pressure pipeline, and the negative pressure pipeline is connected to the chamber of the outer shell 10;

[0108] Dust collector: The dust collector is installed on the negative pressure pipeline, and the dust collector is suitable for filtering and collecting the extracted dust particles.

[0109] In this embodiment, if Figure 1 As shown, the negative pressure cleaning device 300 is used to clean the residual materials and dust inside the outer shell 10. During the material metering and transportation process, some fine material particles will inevitably remain inside the outer shell 10. If not cleaned in time, these residues will affect the metering accuracy of subsequent batches of materials and may also contaminate the product. Therefore, it is necessary to set up a negative pressure cleaning device 300 to achieve automatic cleaning.

[0110] The vacuum generator is installed outside the outer shell 10, and generates negative pressure suction through the negative pressure pipeline connected to the inside of the outer shell 10 to absorb the residue in the outer shell. The dust collector is installed on the negative pressure pipeline to filter the airflow sucked through the negative pressure pipeline, capture the residual dust and particulate matter, and prevent them from being discharged to pollute the environment.

[0111] The negative pressure suction force generated by the vacuum generator acts on the inside of the outer shell 10 through the negative pressure pipeline, sucking the residual dust and small particles inside into the negative pressure pipeline. The dust and matter are filtered and separated when passing through the dust collector, thereby achieving efficient cleaning of the inside of the outer shell. The negative pressure cleaning device 300 is generally used for cleaning after the material metering and conveying process is completed.

[0112] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A material metering device for producing leprocaine cream, characterized in that: include: An outer shell (10), wherein a chamber is provided in the outer shell (10); A weighing mechanism (20), the weighing mechanism (20) being installed in the chamber of the outer shell (10); A material measuring bin (30), the material measuring bin (30) being arranged on the weighing mechanism (20) and located in the chamber of the outer shell (10), and a feeding port being arranged above the material measuring bin (30); A feed pipe (40), the feed pipe (40) being mounted on the outer shell (10), and the feed pipe (40) extending to above the material metering bin (30); A feed valve (50), the feed valve (50) being installed on the feed pipe (40), the feed valve (50) being suitable for controlling the feed of the feed pipe (40); A discharge pipe (60), the discharge pipe (60) is installed at the bottom of the material metering bin (30), and the discharge pipe (60) is connected to the material metering bin (30); a discharge valve (70), the discharge valve (70) being installed on the discharge pipe (60), the discharge valve (70) being suitable for controlling the discharge of the discharge pipe (60); The weighing mechanism (20) is suitable for weighing the material measuring bin (30) and the material in the material measuring bin (30); The extrusion discharging mechanism comprises: An extrusion drive source (80), the extrusion drive source (80) being fixed to the outer shell (10), the extrusion drive source (80) being provided with a piston rod (81) extending into the outer shell (10), the piston rod (81) being provided with a telescopic drive end; A pressure plate (90), the pressure plate (90) being fixed on the telescopic driving end of the piston rod (81), the pressure plate being located above the material metering bin (30), the outer peripheral surface of the pressure plate (90) being adapted to form a close fit with the inner wall surface of the material metering bin (30); The pressure plate (90) is provided with a discharge hole; The feed pipe (40) is adapted to pass through the discharge hole of the pressure plate (90); a discharge hole opening and closing mechanism, the discharge hole opening and closing mechanism being mounted on the pressure plate (90), the discharge hole opening and closing mechanism being adapted to close the discharge hole when the feed pipe (40) is separated from the discharge hole of the pressure plate (90); The extrusion driving source (80) is suitable for driving the pressure plate (90) to move downward, enter the material metering bin (30), squeeze the material in the material metering bin (30), and discharge it through the discharge pipe (60).

2. The material metering device for producing leprocaine cream according to claim 1, characterized in that: It also includes a discharging conveying mechanism, which includes: A conveying shell (100), wherein the conveying shell (100) is provided with a feed opening suitable for receiving the discharge of the discharge pipe (60), and the feed opening is arranged in the outer shell (10); A conveying screw rod (110), wherein the conveying screw rod (110) is rotatably mounted in the conveying housing (100); A rotational driving source is installed at one end of the conveying shell (100), and the rotational driving source is provided with an output end, and the output end is connected to one end of the conveying screw rod (110), and the rotational driving source is suitable for driving the conveying screw rod (110) to rotate.

3. The material metering device for producing leprocaine cream according to claim 2, characterized in that: The rotation driving source is a servo motor.

4. The material metering device for producing leprocaine cream according to claim 1, characterized in that: It also includes a filter screen installed at the inlet of the feed pipe (40).

5. The material metering device for producing leprocaine cream according to claim 1, characterized in that: The discharge hole opening and closing mechanism comprises: A telescopic driving source (210), the telescopic driving source (210) being mounted on the pressure plate (90), and the telescopic driving source (210) being provided with a telescopic end; A rotary cavity is provided in the pressure plate (90), and the rotary cavity is connected to the discharge hole of the pressure plate (90); A discharge hole blocking block (220), wherein the discharge hole blocking block (220) is movably mounted in the rotary cavity; A hinged rod (230), the hinged rod (230) being rotatably disposed in the pressure plate (90), one end of the hinged rod (230) extending out of the outer surface of the pressure plate (90), referred to as an outer end, and the other end extending into the rotating cavity, referred to as an inner end; A swing link (240), one end of which is fixedly connected to the inner end of the hinge rod (230), and the other end of which is connected to the side surface of the discharge hole blocking block; A driving connecting rod (250), one end of which is fixedly connected to the outer end of the hinge rod (230), and the other end of which is hinged to the telescopic end of the telescopic driving source (210); The telescopic driving source (210) is suitable for driving the swing connecting rod (240) to swing through the driving connecting rod (250), so that the discharge hole blocking block (220) opens and closes the discharge hole.

6. The material metering device for producing leprocaine cream according to claim 1, characterized in that: A guide structure suitable for introducing the pressure plate (90) is provided on the inner wall of the feeding port above the material metering bin (30).

7. The material metering device for producing leprocaine cream according to claim 1, characterized in that: Also included is a constant temperature structure, the constant temperature structure comprising: a temperature detection sensor, the temperature detection sensor being installed in the outer shell (10), the temperature detection sensor being suitable for detecting the temperature in the outer shell (10); a semiconductor refrigeration chip, the semiconductor refrigeration chip being mounted on the outer shell (10), the semiconductor refrigeration chip being suitable for adjusting the temperature inside the outer shell (10); A controller is electrically connected to the temperature detection sensor and the semiconductor refrigeration chip respectively, and a preset temperature is set on the controller. The controller is suitable for obtaining the temperature of the temperature detection sensor and controlling the semiconductor refrigeration chip according to the preset temperature to adjust the temperature inside the outer shell (10).

8. The material metering device for producing leprocaine cream according to claim 1, characterized in that: Also included is a negative pressure cleaning device (300), the negative pressure cleaning device (300) comprising: a vacuum generator, the vacuum generator being installed outside the outer shell (10), the vacuum generator being provided with a negative pressure pipeline, the negative pressure pipeline being in communication with the chamber of the outer shell (10); A dust collector is installed on the negative pressure pipeline, and the dust collector is suitable for filtering and collecting the extracted dust particles.

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