Liquid leakage-proof water-light needle layered medicament precise filling assembly
Patent Information
- Application Number
- CN202611195414.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-08-07
- Publication Date
- 2026-10-09
AI Technical Summary
[0003]现有水光药剂灌装设备在实际生产应用中，对针管的定位结构单一，多采用固定式限位夹持结构，针管装夹繁琐、定心精度差，无法实现针管的快速对位固定与快速拆装更换，换料等待时间长，极大降低了分层水光药剂的批量灌装生产效率，难以适配多规格、小剂量、多品类分层水光药剂的快速切换生产需求，且现有灌装管出料结构多为普通直孔出料结构，针对水光药剂高低黏度差异化流体特性适配性差，高黏度微交联玻尿酸、胶原基底药剂极易在灌针管口产生挂壁、拉丝及残滴现象，低黏度美白、修护类药剂易形成管口聚集大液滴，灌装结束后药液易残留于灌装管道内部及出料端口，不仅造成药剂浪费、分层界面被残余药液污染，还会导致每支针管灌装剂量误差偏大，严重影响分层水光药剂的灌装精度与成品一致性
1、灌装作业过程中，伺服电机驱动丝杆带动升降台运动，使设于内盘板下方的灌装管与底管伸入针筒内腔底部；第一微型计量泵定量抽取储存筒左侧存放的高黏度防漏基底药剂并输送至灌装管，药剂经由底管排出，完成高黏度防漏基底药剂的灌装。高黏度防漏基底药剂灌装完毕后，微型电机驱动内丝杆转动，驱使顶压板与密封环沿灌装管、底管内壁向下移动，刮除附着于灌装管及底管内壁的残留药剂；转动的内丝杆同步带动底管旋转，依靠离心作用将粘附于底管底端的高黏度防漏基底药剂甩出，有效减少灌装管内部药液残留，抑制拉丝、滴漏现象。在后续各层药剂灌装进程中，伺服电机同步驱动丝杆带动升降台向上抬升灌装管，防止药液冲击造成分层界面紊乱。
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Figure CN122877408A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of quantitative filling device technology, and in particular to a leak-proof, layered, precision filling component for water-light injection drugs. Background Technology
[0002] Based on the principle of layered skin treatment, layered hyaluronic acid injections typically consist of a high-viscosity base anti-permeability agent, a medium-viscosity nourishing and energizing agent, or a low-viscosity whitening and repairing agent. The physicochemical properties of these agents vary significantly, necessitating strict layered injection during clinical use and prohibiting pre-mixing. Otherwise, risks such as drug precipitation, loss of activity, skin irritation, and post-inflammatory hyperpigmentation may occur. Therefore, layered hyaluronic acid injections require independent layered filling and non-mixed sealing production methods, placing extremely high demands on the layering accuracy of the filling equipment, ensuring no residual liquid discharge, preventing stringing and dripping, and facilitating efficient needle positioning and replacement.
[0003] Existing water-light hydrating agent filling equipment suffers from simplistic needle positioning structures in practical production applications. These often employ fixed, limiting clamping mechanisms, resulting in cumbersome needle clamping, poor centering accuracy, and an inability to achieve rapid needle alignment, fixation, and replacement. This leads to long waiting times for material changes, significantly reducing the production efficiency of batch filling of layered water-light hydrating agents. Furthermore, it struggles to meet the rapid switching requirements of multi-specification, small-dosage, and multi-category layered water-light hydrating agents. Additionally, existing filling tube discharge structures are mostly simple straight-hole discharge structures, which... The high and low viscosity of water-light agents have poor compatibility with each other. High-viscosity micro-crosslinked hyaluronic acid and collagen-based agents are prone to sticking, stringing, and dripping at the injection nozzle. Low-viscosity whitening and repair agents tend to form large droplets at the nozzle. After filling, the liquid is likely to remain inside the filling pipe and at the discharge port, which not only wastes the agent and contaminates the layering interface with residual liquid, but also leads to large errors in the filling dosage of each syringe, seriously affecting the filling accuracy and consistency of the finished product of the layered water-light agents.
[0004] In summary, existing water-based pharmaceutical filling equipment suffers from technical shortcomings such as low needle replacement efficiency, poor layered filling accuracy, easy residue in the filling tube, easy stringing and dripping, and low product yield. These limitations prevent it from meeting the demands for high-precision, residue-free, and high-efficiency aseptic layered water-based pharmaceutical filling production. Therefore, there is an urgent need to design a precise layered pharmaceutical filling component for water-based pharmaceuticals that allows for quick needle clamping and replacement, accurate filling, complete elimination of residual pharmaceutical solution in the pipeline, and prevention of stringing and leakage. Summary of the Invention
[0005] The purpose of this invention is to solve the problems existing in the above-mentioned background art, and to propose a leak-proof water-light needle layered drug precision filling component.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: A leak-proof, layered, precision filling assembly for a water-light injection includes a support base and a support frame. The support frame is fixed to the upper surface of the support base. A servo motor is fixed to the upper left side of the support frame. A lead screw is installed at the bottom of the drive shaft of the servo motor's power output end. A lifting platform is embedded inside the upper part of the support frame. The lead screw is embedded in the left rear end of the lifting platform and connected to the lifting platform via a thread. A filling assembly is embedded inside the left side of the lifting platform. A stepper motor is fixed to the right side of the upper surface of the lifting platform. A placement cylinder is vertically fixed to the center of the bottom end of the support base. An electric push rod is vertically fixed to the lower part of the placement cylinder. A lower top plate is installed at the top of the push rod's power output end. A pressure plate is embedded inside the placement cylinder. A return spring and a limit post are embedded inside the pressure plate.
[0007] Preferably, the filling assembly consists of an inner plate, a storage cylinder, a first micro metering pump, a second micro metering pump, a filling tube, a limiting strip, a micro motor, an inner lead screw, a top pressure plate, a sealing ring, a bottom tube, a connecting rod, and an upper top plate; An inner plate is embedded in the left side of the lifting platform. A storage cylinder is fixed to the top of the inner plate. A first micro metering pump and a second micro metering pump are fixed to the middle and right sides of the lifting platform, respectively. A filling tube is fixed to the lower right side of the inner plate. A limit strip is vertically fixed to the inner wall of the filling tube. A micro motor is fixed to the top of the filling tube. An internal lead screw is installed at the bottom of the drive shaft of the power output end of the micro motor. A top pressure plate is nested on the outside of the internal lead screw. A sealing ring is installed at the bottom of the top pressure plate. A bottom tube is embedded in the bottom of the filling tube. A connecting rod is fixed to the outer wall of the bottom end of the internal lead screw. An upper top plate is installed on the bottom left side of the inner plate.
[0008] Preferably, the power output end of the stepper motor is connected to the inner plate via a gear disk, and the inner plate rotates 180° back and forth inside the lifting platform. The axis of the filling tube, the axis of the placement cylinder and the axis of the lower top plate are located on the same vertical line.
[0009] Preferably, a vertical opening is provided on the left side of the upper surface of the support base, and the vertical opening is correspondingly arranged below the upper top plate. After the inner plate is rotated 180°, the central axis of the upper top plate, the central axis of the placement cylinder and the central axis of the lower top plate are located on the same vertical line.
[0010] Preferably, the inlet pipes of the first micro metering pump and the second micro metering pump are respectively connected to the left and right sides inside the storage cylinder, and the outlet pipes of the first micro metering pump and the second micro metering pump are respectively connected to the left and right sides above the filling pipe. The top pressure plate is located above the connection position between the outlet pipe and the filling pipe.
[0011] Preferably, the outer diameter of the top pressure plate and the sealing ring matches the hollow inner diameter of the filling pipe and the bottom pipe, the outer wall of the inner threaded rod is connected to the inner wall of the top pressure plate by a thread, and the top pressure plate moves up and down vertically inside the filling pipe and the bottom pipe.
[0012] Preferably, the end of the connecting rod away from the center of the inner screw is connected to the bottom tube, the bottom tube rotates horizontally inside the filling tube, and the bottom tube has an outwardly inclined chamfered surface inside.
[0013] Preferably, the height of the bottom tube is less than the height of the top pressure plate, the limiting strip is made of magnetic material, and the limiting strip and the top pressure plate can attract each other by magnetic force.
[0014] Preferably, the lower top plate is located below the pressure plate, the outer wall of the lower top plate is in close contact with the inner wall of the placement cylinder, and the push rod at the power output end of the electric push rod pushes the lower top plate to move up and down vertically inside the placement cylinder.
[0015] Preferably, 5 to 8 hidden grooves are equidistantly opened inside the placement cylinder along the circumferential direction. Each hidden groove is fitted with a pressure plate. The limiting post is fixedly installed in the hidden groove. The pressure plate can slide along the limiting post in the hidden groove towards the center of the placement cylinder and away from the center of the placement cylinder.
[0016] This invention provides a leak-proof, layered, precision filling component for hyaluronic acid injections, which has the following beneficial effects: 1. During the filling process, a servo motor drives a lead screw to move the lifting platform, causing the filling tube and bottom tube located below the inner plate to extend into the bottom of the syringe cavity. The first micro metering pump quantitatively extracts the high-viscosity leak-proof base agent stored on the left side of the storage cylinder and delivers it to the filling tube. The agent is discharged through the bottom tube, completing the filling of the high-viscosity leak-proof base agent. After the high-viscosity leak-proof base agent is filled, the micro motor drives the inner lead screw to rotate, causing the top pressure plate and sealing ring to move downwards along the inner walls of the filling tube and bottom tube, scraping off the residual agent adhering to the inner walls of the filling tube and bottom tube. The rotating inner lead screw synchronously drives the bottom tube to rotate, relying on centrifugal force to throw out the high-viscosity leak-proof base agent adhering to the bottom end of the bottom tube, effectively reducing the residual liquid inside the filling tube and suppressing stringing and dripping phenomena. In the subsequent filling process of each layer of agent, the servo motor synchronously drives the lead screw to lift the lifting platform upwards to prevent the liquid impact from causing layer interface disorder.
[0017] 2. When the syringe is vertically inserted into the placement cylinder, the stepper motor drives the inner plate to rotate 180°, aligning the upper top plate directly above the placement cylinder. Then, the servo motor drives the lead screw to move the lifting platform, and the lifting platform, inner plate, and upper top plate move downwards synchronously. The descending upper top plate presses down on the syringe until its bottom end abuts against the lower top plate. During its descent within the placement cylinder, the syringe contacts the pressure plate, pushing it away from the center of the placement cylinder, compressing the return spring. The compressed spring then rebounds, causing the pressure plate to press firmly against the outer wall of the syringe, thus achieving rapid centering and fixation of the syringe. After filling is completed, the lifting platform returns to its original position, and the electric push rod drives the lower top plate to push the syringe upwards, lifting it from the bottom of the placement cylinder. This allows for rapid syringe clamping and replacement, reducing replacement time and ensuring the stability of layered filling production. Attached Figure Description
[0018] Figure 1 This is a front view of the overall structure of the present invention; Figure 2 This is a front cross-sectional view of the overall structure in this invention; Figure 3 This is a schematic diagram of the overall structure of the present invention with the needle in a clamping state; Figure 4 This is a partial exploded view of the placement cylinder structure in this invention; Figure 5 This is a schematic cross-sectional view of the upper surface of a partial structure of the placement cylinder in this invention; Figure 6 This is a schematic diagram of a partial structure of the lifting platform in this invention; Figure 7 This is a schematic diagram of a partial structure of the inner plate in this invention; Figure 8 This is a schematic diagram of a partial front cross-sectional view of the inner plate structure in this invention; Figure 9 This is a schematic diagram of the partial structure of the top pressure plate in this invention in use. Figure 10 This is a partial structural diagram of the filling tube and bottom tube in this invention.
[0019] Legend: Support base 1, support frame 2, servo motor 201, lead screw 202, lifting platform 3, inner plate 4, storage cylinder 401, first micro metering pump 402, second micro metering pump 403, filling tube 404, limit bar 405, micro motor 406, inner lead screw 407, top pressure plate 408, sealing ring 409, bottom tube 410, connecting rod 411, stepper motor 412, upper top plate 413, placement cylinder 5, electric push rod 501, lower top plate 502, pressure plate 503, return spring 504, limit post 505. Detailed Implementation
[0020] Example 1, referring to Figure 1-10 A leak-proof, layered, precision filling component for a water-light injection includes a support base 1 and a support frame 2. The support frame 2 is fixed to the upper surface of the support base 1. The component is characterized by a servo motor 201 fixed to the upper left side of the support frame 2, a lead screw 202 installed at the bottom of the drive shaft of the power output end of the servo motor 201, a lifting platform 3 embedded inside the upper part of the support frame 2, the lead screw 202 being embedded in the left rear end of the lifting platform 3 and connected to the lifting platform 3 by a thread, a filling component embedded inside the left side of the lifting platform 3, a stepper motor 412 fixed to the right side of the upper surface of the lifting platform 3, a placement cylinder 5 vertically fixed to the middle of the bottom end of the support base 1, an electric push rod 501 vertically fixed to the lower part of the placement cylinder 5, a lower top plate 502 installed at the top of the push rod at the power output end of the electric push rod 501, a pressure plate 503 embedded inside the placement cylinder 5, and a return spring 504 and a limiting post 505 embedded inside the pressure plate 503.
[0021] The filling assembly consists of an inner plate 4, a storage cylinder 401, a first micro metering pump 402, a second micro metering pump 403, a filling tube 404, a limiting strip 405, a micro motor 406, an inner lead screw 407, a top pressure plate 408, a sealing ring 409, a bottom tube 410, a connecting rod 411, and an upper top plate 413. An inner plate 4 is embedded in the left side of the lifting platform 3. A storage cylinder 401 is fixed to the top of the inner plate 4. A first micro metering pump 402 and a second micro metering pump 403 are fixed to the middle and right sides of the lifting platform 3, respectively. A filling tube 404 is fixed to the lower right side of the inner plate 4. A limit strip 405 is vertically fixed to the inner wall of the filling tube 404. A micro motor 406 is fixed to the top of the filling tube 404. An inner screw 407 is installed at the bottom of the drive shaft at the power output end of the micro motor 406. A top pressure plate 408 is nested on the outside of the inner screw 407. A sealing ring 409 is installed at the bottom of the top pressure plate 408. A bottom tube 410 is embedded in the bottom of the filling tube 404. A connecting rod 411 is fixed to the outer wall of the bottom end of the inner screw 407. An upper top plate 413 is installed on the left side of the bottom of the inner plate 4.
[0022] The power output end of the stepper motor 412 is connected to the inner plate 4 via a gear disk. The inner plate 4 rotates 180° back and forth inside the lifting platform 3. The axis of the filling tube 404, the axis of the placement cylinder 5 and the axis of the lower top plate 502 are on the same vertical line. A vertical opening is provided on the left side of the upper surface of the support base 1. The vertical opening is arranged below the upper top plate 413. After the inner plate 4 is rotated 180°, the central axis of the upper top plate 413, the central axis of the placement cylinder 5 and the central axis of the lower top plate 502 are on the same vertical line. When the stepper motor 412 drives the inner plate 4 to rotate 180°, the upper top plate 413 will be exactly at the top of the placement cylinder 5. At this time, the servo motor 201 drives the lead screw 202 to rotate in the lifting platform 3, so that the lifting platform 3, the inner plate 4 and the upper top plate 413 move down at the same time, allowing the moving upper top plate 413 to move the needle tube down in the placement cylinder 5 until the bottom of the needle tube is close to the lower top plate 502, realizing the rapid positioning of the needle tube, and at the same time avoiding contamination of the filling tube 404 and the bottom tube 410 during the process of picking up and replacing the needle tube; The inlet pipes of the first micro metering pump 402 and the second micro metering pump 403 are respectively connected to the left and right sides inside the storage cylinder 401. The outlet pipes of the first micro metering pump 402 and the second micro metering pump 403 are respectively connected to the left and right sides above the filling pipe 404. The top pressure plate 408 is located above the connection position between the outlet pipe and the filling pipe 404. During filling, the filling tube 404 and the bottom tube 410 extend into the bottom of the syringe cavity; the first micro metering pump 402 quantitatively extracts the high-viscosity leak-proof base agent stored on the left side of the storage cylinder 401 and delivers it to the filling tube 404. The agent is discharged through the bottom tube 410, completing the filling of the high-viscosity leak-proof base agent. Subsequently, the residual drug liquid inside the filling tube 404 is removed. The second micro metering pump 403 then quantitatively extracts the nutrient carrier and other agents stored on the right side of the storage cylinder 401 and delivers them to the filling tube 404. The agent is discharged through the bottom tube 410. During the filling process, the servo motor 201 will synchronously drive the lead screw 202 to lift the lifting platform 3 upward to prevent the drug liquid from impacting and causing the layer interface to become disordered. The outer diameter of the top pressure plate 408 and the sealing ring 409 matches the hollow inner diameter of the filling tube 404 and the bottom tube 410. The outer wall of the inner threaded rod 407 is connected to the inner wall of the top pressure plate 408 by threads. The top pressure plate 408 moves up and down vertically inside the filling tube 404 and the bottom tube 410. The micro motor 406 drives the internal screw 407 to rotate, causing the top pressure plate 408 and the sealing ring 409 to move down along the inner wall of the filling tube 404 and the bottom tube 410, scraping off the medicine remaining on the inner wall of the filling tube 404 and the bottom tube 410, reducing the retention and adhesion of medicine, avoiding cross-contamination of different layers of medicine, and reducing the risk of medicine stringing and dripping. The end of the connecting rod 411 away from the center of the inner threaded rod 407 is connected to the bottom tube 410. The bottom tube 410 rotates horizontally inside the filling tube 404. The bottom tube 410 has an outwardly inclined chamfered surface inside its lower part. As the inner screw 407 rotates, it will drive the bottom tube 410 to rotate, causing the high-viscosity anti-leakage base agent at the bottom of the bottom tube 410 to fall off, making it less likely for liquid to remain in the bottom tube 410 at the bottom of the filling tube 404, and less likely for it to string and drip. The bottom end of the bottom tube 410 is provided with an outwardly inclined chamfered surface. On the one hand, this can reduce the resistance of the agent discharge and prevent high-viscosity water-based agents from accumulating and adhering to the wall at the discharge port. On the other hand, it can weaken the adhesion conditions of the liquid and effectively suppress the phenomenon of stringing and droplet aggregation at the discharge end. At the same time, during the centrifugal discharge stage, the inclined surface can guide the adhering agent to detach from the bottom tube 410, further reducing the agent residue at the tube opening. The height of the bottom tube 410 is less than the height of the top plate 408. The limiting strip 405 is made of magnetic material, and the limiting strip 405 and the top plate 408 can attract each other by magnetic force. The limiting strip 405 is used to generate magnetic attraction to the top pressure plate 408; when the micro motor 406 drives the inner screw 407 to rotate at low speed, under the action of magnetic constraint, the inner screw 407 will not drive the top pressure plate 408 to rotate synchronously, ensuring that the top pressure plate 408 can rise and fall normally in the vertical direction. When the micro motor 406 drives the inner screw 407 to rotate at high speed, the inner screw 407 overcomes the magnetic constraint and drives the top pressure plate 408 to rotate together, thereby relying on centrifugal force to throw off the agent adhering to the bottom of the sealing ring 409. Because the top pressure plate 408 is relatively high, when the top pressure plate 408 moves to the bottom of the inner screw 407, the upper part is located inside and below the filling tube 404. At this time, the limiting strip 405 can still generate magnetism to attract the top pressure plate 408, so that the top pressure plate 408 can still move up and down normally.
[0023] Example 2 differs from Example 1 in that, in this example, the lower top plate 502 is located below the pressure plate 503, the outer wall of the lower top plate 502 is in close contact with the inner wall of the placement cylinder 5, and the push rod at the power output end of the electric push rod 501 pushes the lower top plate 502 to move up and down vertically inside the placement cylinder 5. When the syringe is placed vertically into the placement cylinder 5, the stepper motor 412 drives the inner plate 4 to rotate 180° so that the upper plate 413 is exactly at the top of the placement cylinder 5. At this time, the servo motor 201 drives the lead screw 202 to rotate in the lifting platform 3, so that the lifting platform 3, the inner plate 4, and the upper plate 413 move down at the same time. The moving upper plate 413 will push the syringe down until the bottom of the syringe is close to the lower plate 502. When the syringe moves down in the placement cylinder 5, it will contact the pressure plate 503, pushing the pressure plate 503 to move away from the center of the placement cylinder and compressing the return spring 504. Subsequently, the return spring 504 will generate a rebound force to push the pressure plate 503 to be close to the outer wall of the syringe, realizing the quick fixation of the syringe. After the lifting platform 3 resets the syringe, after the filling is completed, the electric push rod 501 can push the syringe to rise quickly from the bottom of the placement cylinder 5 through the lower plate 502, making it easier to pick up and remove the syringe. The inside of the placement cylinder 5 has 5 to 8 hidden slots equidistantly arranged along the circumferential direction. Each hidden slot is fitted with a pressure plate 503. A limiting post 505 is fixedly installed in the hidden slot. The pressure plate 503 can slide along the limiting post 505 in the hidden slot towards the center of the placement cylinder 5 and away from the center of the placement cylinder 5. When the needle is embedded in the placement cylinder 5, it will contact the pressure plate 503 and push the pressure plate 503 to move away from the center of the placement cylinder 5. This causes the pressure plate 503 to compress and deform the return spring 504. After being compressed, the return spring 504 generates a rebound force, which drives the pressure plate 503 to press tightly against the outer wall of the needle. This achieves the rapid clamping and fixing of the needle by multiple pressure plates 503. When the lower plate 502 pushes the syringe upward, it will contact the pressure plate 503 and push the pressure plate 503 into the hidden groove to avoid obstructing the upward movement of the syringe, making it easier to retrieve the syringe later.
[0024] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these should also be considered within the scope of protection of the present invention. These will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.
Claims
1. A leak-proof, layered, precision filling assembly for a water-light injection, comprising a support base (1) and a support frame (2), wherein the support frame (2) is fixed to the upper surface of the support base (1), characterized in that, A servo motor (201) is fixed on the upper left side of the support frame (2). A lead screw (202) is installed at the bottom of the transmission shaft of the power output end of the servo motor (201). A lifting platform (3) is embedded in the upper part of the support frame (2). The lead screw (202) is embedded in the left rear end of the lifting platform (3) and connected to the lifting platform (3) by a thread. A filling component is embedded in the left side of the lifting platform (3). A stepper motor (412) is fixed on the right side of the upper surface of the lifting platform (3). A placement cylinder (5) is vertically fixed in the middle of the bottom end of the support base (1). An electric push rod (501) is vertically fixed in the lower part of the placement cylinder (5). A lower top plate (502) is installed on the top of the push rod at the power output end of the electric push rod (501). A pressure plate (503) is embedded in the placement cylinder (5). A return spring (504) and a limit post (505) are embedded in the pressure plate (503).
2. The leak-proof, layered, precision filling assembly for water-light injections according to claim 1, characterized in that, The filling assembly consists of an inner plate (4), a storage cylinder (401), a first micro metering pump (402), a second micro metering pump (403), a filling tube (404), a limiting strip (405), a micro motor (406), an inner lead screw (407), a top pressure plate (408), a sealing ring (409), a bottom tube (410), a connecting rod (411), and an upper top plate (413); An inner plate (4) is embedded in the left side of the lifting platform (3). A storage cylinder (401) is fixed to the top of the inner plate (4). A first micro metering pump (402) and a second micro metering pump (403) are fixed to the middle and right sides of the lifting platform (3), respectively. A filling tube (404) is fixed to the lower right side of the inner plate (4). A limit strip (405) is vertically fixed to the inner wall of the filling tube (404). A micro metering pump (403) is fixed to the top of the filling tube (404). The motor (406) has an inner screw (407) installed at the bottom of the drive shaft of the power output end of the micro motor (406). A top pressure plate (408) is nested on the outside of the inner screw (407). A sealing ring (409) is installed at the bottom of the top pressure plate (408). A bottom tube (410) is embedded at the bottom of the filling tube (404). A connecting rod (411) is fixed on the outer wall of the bottom end of the inner screw (407). An upper top plate (413) is installed on the left side of the bottom of the inner plate (4).
3. The leak-proof, layered, precision filling assembly for water-light injections according to claim 2, characterized in that, The power output end of the stepper motor (412) is connected to the inner plate (4) via a gear disk. The inner plate (4) rotates 180° back and forth inside the lifting platform (3). The axis of the filling tube (404), the axis of the placement cylinder (5), and the axis of the lower top plate (502) are located on the same vertical line.
4. The leak-proof, water-light injection layered drug precision filling component according to claim 2 or 3, characterized in that, The support base (1) has a vertical opening on the left side of its upper surface. The vertical opening is located below the upper top plate (413). After the inner plate (4) is rotated 180°, the central axis of the upper top plate (413), the central axis of the placement cylinder (5), and the central axis of the lower top plate (502) are on the same vertical line.
5. The leak-proof, layered, precision filling assembly for water-light injections according to claim 2, characterized in that, The inlet pipes of the first micro metering pump (402) and the second micro metering pump (403) are respectively connected to the left and right sides inside the storage cylinder (401), and the outlet pipes of the first micro metering pump (402) and the second micro metering pump (403) are respectively connected to the left and right sides above the filling pipe (404). The top pressure plate (408) is located above the connection position between the outlet pipe and the filling pipe (404).
6. The leak-proof, layered, precision filling assembly for water-light injections according to claim 2, characterized in that, The outer diameter of the top pressure plate (408) and the sealing ring (409) matches the hollow inner diameter of the filling tube (404) and the bottom tube (410). The outer wall of the inner threaded rod (407) is connected to the inner wall of the top pressure plate (408) by a thread. The top pressure plate (408) moves up and down vertically inside the filling tube (404) and the bottom tube (410).
7. The leak-proof, layered, precision filling assembly for water-light injections according to claim 2, characterized in that, The end of the connecting rod (411) away from the center of the inner threaded rod (407) is connected to the bottom tube (410). The bottom tube (410) rotates horizontally inside the filling tube (404). The bottom tube (410) has an outwardly inclined chamfered surface inside its lower part.
8. The leak-proof, layered, precision filling assembly for water-light injections according to claim 2, characterized in that, The height of the bottom tube (410) is less than the height of the top plate (408), the limiting strip (405) is made of magnetic material, and the limiting strip (405) and the top plate (408) can attract each other by magnetic force.
9. The leak-proof, layered, precision filling assembly for water-light injections according to claim 1, characterized in that, The lower top plate (502) is located below the pressure plate (503). The outer wall of the lower top plate (502) is in close contact with the inner wall of the placement cylinder (5). The push rod at the power output end of the electric push rod (501) pushes the lower top plate (502) to move up and down vertically inside the placement cylinder (5).
10. The leak-proof, layered, precision filling assembly for water-light injections according to claim 1, characterized in that, The placement cylinder (5) has 5 to 8 hidden slots equidistantly arranged along the circumferential direction inside. Each hidden slot is fitted with a pressure plate (503). The limiting post (505) is fixedly installed in the hidden slot. The pressure plate (503) can slide along the limiting post (505) in the hidden slot toward the center of the placement cylinder (5) and away from the center of the placement cylinder (5).