A backfill-preventing structure for a syringe

Abstract

The utility model discloses a kind of needle ampoule with non-return filling structure, including bracing plate, the upper surface of bracing plate is fixedly connected with slide rail, the upper surface of slide rail is equidistant and is equipped with the slider that can slide left and right, the upper surface of slider is provided with support strip, the edge of support strip along first direction is provided with gap, the left side of slide rail is fixedly connected with stop clamp fixed seat, right side is fixedly connected with bearing plate.This kind of needle ampoule with non-return filling structure, by integrating slide rail, slider, support strip, non-return plate, clamping plate and other core components on the unified bracing plate, a modular non-return filling unit is formed, this modular design makes the whole structure compact, orderly, not only facilitate the installation and debugging of whole, more when fault occurs or needs to replace vulnerable parts, specific components (such as single support strip or clamping plate) can be quickly positioned and independently replaced, greatly simplify later maintenance process, reduce equipment downtime.

Description

Technical Field

[0001] This utility model relates to the field of check valves for filling medicine vials, specifically a check valve filling structure for vials. Background Technology

[0002] As a commonly used sealed packaging container in the pharmaceutical field, syringe vials are widely used for the storage and transportation of liquid drugs, biological agents, and other products. The sealing and accuracy of the filling process directly affect the quality and safety of the drug. In syringe vial filling operations, the check valve is a key component to ensure filling effectiveness. Its core function is to prevent backflow of the filled drug, prevent external air or contaminants from entering the vial, and ensure the accuracy of the filling dosage.

[0003] The check valve structure in existing syringe bottle filling equipment has many shortcomings. The structure is complex and difficult to maintain. At the same time, the check valve is not reliable enough. Some structures are prone to backflow and leakage due to wear of seals and pressure fluctuations, resulting in drug waste or contamination.

[0004] In view of this, further optimizations will be made to address the aforementioned issues. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a backflow prevention structure for needle-shaped bottles, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a check valve structure for needle-shaped bottles, including a support plate, a slide rail fixedly connected to the upper surface of the support plate, sliders that can slide left and right equidistantly provided on the upper surface of the slide rail, a support strip provided on the upper surface of the sliders, a notch provided at the edge of the support strip along a first direction, a stop clamp fixed seat fixedly connected to the left side of the slide rail, a bearing plate fixedly connected to the right side, and an extension plate provided at the top of the bearing plate, located at the top of the support strip; The top of the extension plate is symmetrically provided with limiting shafts. On the surface of the limiting shafts, the top of the extension plate is provided with a check plate that can slide left and right. On the right side of the bearing plate, there is a push electromagnet that works with the check plate. On the upper surface of the support bar, there is a clamping plate at the part that abuts against the check plate. Flexible connectors are provided on both sides of the check plate and the clamping plate. The upper surface of the support plate is provided with a driving component for driving the support bar to move left and right.

[0007] Preferably, the clamping fixing seat includes a through hole at the top, and the bottom of the clamping fixing seat is fixedly connected to the upper surface of the support plate by bolts, with the through hole located above the notch.

[0008] Preferably, the support bar is fixedly connected to the top of the slider by bolts, and the bottom of the slider is provided with a groove that matches the slide rail; The push electromagnet includes a mounting plate fixedly connected to the right side of the support plate, and the push electromagnet is fixedly connected to one side of the mounting plate.

[0009] Preferably, the upper surface of the check plate is symmetrically provided with limiting grooves for use with the limiting shaft, and the flexible connector includes a fixed shaft on both sides of the check plate and the clamping plate, and a tension spring between the fixed shafts.

[0010] Preferably, a limiting hole is provided between the two limiting grooves on the upper surface of the check plate, and the output end of the push electromagnet is located above the limiting hole.

[0011] Preferably, the driving component includes a check servo motor fixedly connected to the upper surface of the support plate. The output end of the check servo motor is connected to a lead screw via a coupling. A bracket is provided on the outer wall of the lead screw near the coupling, and a bracket is provided on the other end of the lead screw. The bottoms of the bracket and the bracket are fixedly connected to the upper surface of the support plate.

[0012] Preferably, a drive cylinder is threadedly connected between the surface of the lead screw and the first and second supports. A mating plate is fixedly connected to the surface of the drive cylinder. A positioning plate is fixedly connected to the other end of the mating plate by bolts. The positioning plate is fixedly connected to the upper surface of the support bar by bolts.

[0013] This utility model has the following beneficial effects: This new type of check valve filling structure for syringe bottles integrates core components such as slide rails, sliders, support bars, check valve plates, and clamping plates onto a unified support plate, forming a modular check valve filling unit. This modular design makes the entire structure compact and orderly, which not only facilitates overall installation and debugging, but also allows for quick location and independent replacement of specific components (such as a single support bar or clamping plate) in case of malfunction or replacement of vulnerable parts, greatly simplifying the later maintenance process and reducing equipment downtime. This solution introduces an electrical interlock mechanism controlled by a push-type electromagnet. When there is no bottle below a specific filling station (the position for filling needle-type bottles), the control system commands the corresponding push-type electromagnet to move, and its output end extends and inserts into the limiting hole of the check plate, physically blocking the movement of the check plate and clamping plate, thereby preventing the station from performing an invalid tube clamping action. This needle-shaped bottle anti-backflow filling structure features flexible connecting parts (composed of a fixed shaft and a tension spring) on ​​both sides of the anti-backflow plate and the clamping plate. When the anti-backflow plate moves to the right, it can reduce the collision between the anti-backflow plate and the clamping base, thus improving the service life of the equipment. This anti-backflow structure for syringe bottles uses a drive component consisting of a servo motor and a lead screw to drive the support bars to move, achieving high-precision position control. The servo motor has a fast response speed and accurate positioning, which can ensure that all support bars move synchronously and smoothly. This allows the clamping plates at each station to clamp the tubing with consistent force and timing, ensuring the consistency of the filling dosage of each bottle of medicine and meeting the high standards of filling accuracy required by the pharmaceutical industry. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the support plate of this utility model from another perspective; Figure 3 This is a top view of the support plate structure of this utility model; Figure 4 This is a front view structural diagram of the support plate of this utility model; Figure 5 This is a top view of the support plate portion of this utility model. Figure 6 This is a side view of the support plate structure of this utility model; Figure 7 This utility model Figure 1 Enlarged structural diagram at point A in the middle; Figure 8 This utility model Figure 2 Enlarged structural diagram at point B.

[0015] The components are as follows: 1. Support plate; 2. Slide rail; 3. Slider; 4. Support bar; 5. Notch; 6. Anti-clamp fixing seat; 7. Bearing plate; 8. Extension plate; 9. Limiting shaft; 10. Check plate; 11. Push electromagnet; 12. Clamping plate; 13. Flexible connector; 1301. Fixed shaft; 1302. Tension spring; 14. Through hole; 15. Limiting hole; 16. Check servo motor; 17. Lead screw; 18. Limiting groove; 19. Bracket 1; 20. Bracket 2; 21. Drive cylinder; 22. Connecting plate; 23. Positioning plate. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1 to 8This utility model provides a backflow prevention structure for syringe bottles; it includes a support plate 1, a slide rail 2 fixedly connected to the upper surface of the support plate 1, sliders 3 that can slide left and right are equidistantly arranged on the upper surface of the slide rail 2, a support bar 4 is provided on the upper surface of the slider 3, and a notch 5 is provided at the edge of the support bar 4 along the first direction, which can limit the hose for conveying medicine liquid, maintain the stability of hose delivery, and facilitate later maintenance and inspection. A stop clamp fixing seat 6 is fixedly connected to the left side of the slide rail 2, and a bearing plate 7 is fixedly connected to the right side. An extension plate 8 is provided at the top of the bearing plate 7 and is located at the top of the support bar 4. The support bar 4 is fixedly connected to the top of the slider 3 by bolts. The bottom of the slider 3 is provided with a groove that matches the slide rail 2. There are 3 sliders 3, which are equidistantly arranged on the upper surface of the slide rail 2.

[0018] The top of the extension plate 8 is symmetrically provided with a limiting shaft 9. The surface of the limiting shaft 9 and the top of the extension plate 8 are provided with a check plate 10 that can slide left and right. The right side of the bearing plate 7 is provided with a push electromagnet 11 that works with the check plate 10. The upper surface of the support bar 4 is provided with a clamping plate 12 at the part that abuts against the check plate 10. Flexible connectors 13 are provided on both sides of the check plate 10 and the clamping plate 12. The stop clamp fixing seat 6 includes a through hole 14 opened at the top. The bottom of the stop clamp fixing seat 6 is fixedly connected to the upper surface of the support plate 1 by bolts. The through hole 14 is located above the notch 5.

[0019] The push electromagnet 11 includes a mounting plate fixedly connected to the right side of the support plate 7, and the push electromagnet 11 is fixedly connected to one side of the mounting plate.

[0020] The push electromagnet 11 (which is a known prior art) includes the following components; 1. Stator assembly: includes coils and iron core. The coils generate a magnetic field when energized, and the iron core enhances the magnetic flux, which is the basis for generating electromagnetic force. 2. Moving part assembly: The core is the push rod (armature), which is made of magnetic material and can move linearly along the axis. It is the actuator that realizes the "push" action; 3. Reset mechanism: mostly a reset spring, installed at the end of the push rod or stator, used to drive the push rod to reset after power failure; 4. Auxiliary components: including housing (for fixing and protecting the internal structure), guide sleeve (to ensure the linear motion accuracy of the push rod), and wiring terminals (for connecting the power supply); The working principle of the push electromagnet is as follows: After the coil is connected to a DC power supply, it generates a directional magnetic field. The iron core is magnetized to form a closed magnetic circuit, which in turn generates an electromagnetic attraction force on the moving rod made of magnetic material. This attraction force overcomes the elastic force of the return spring and pushes the push rod to extend straight along the guide sleeve to complete preset actions such as pushing materials and closing the circuit. When the power is cut off, the magnetic field of the coil disappears quickly, the electromagnetic attraction force dissipates, the return spring releases its elastic force, and drives the push rod to move in the opposite direction back to the initial position, thus completing one complete working cycle.

[0021] Among them, the push electromagnet 11 is connected to external electrical equipment.

[0022] The upper surface of the check plate 10 is symmetrically provided with limiting grooves 18 for use with the limiting shaft 9. Through the limiting grooves 18, the limiting shaft 9 can move left and right inside to maintain a limited position. The flexible connector 13 includes a fixed shaft 1301 on both sides of the check plate 10 and the clamping plate 12, and a tension spring 1302 between the fixed shafts 1301. On the upper surface of the check plate 10, a limiting hole 15 is provided between the two limiting grooves 18, and the output end of the push electromagnet 11 is located above the limiting hole 15.

[0023] When the push electromagnet 11 is energized, its output end can extend into the interior of the limiting hole 15. When it is de-energized, it automatically retracts with the help of the spring.

[0024] The middle part of the upper surface of the support plate 1 is provided with a driving component for driving the support bar 4 to move left and right. The driving component includes a check servo motor 16 fixedly connected to the upper surface of the support plate 1. The output end of the check servo motor 16 is connected to a lead screw 17 through a coupling. A bracket 19 is provided on the outer wall of the lead screw 17 near the coupling. A bracket 20 is provided on the other end of the lead screw 17. The bottoms of the bracket 19 and the bracket 20 are fixedly connected to the upper surface of the support plate 1. A drive cylinder 21 is threadedly connected between the first bracket 19 and the second bracket 20 on the surface of the lead screw 17. A mating plate 22 is fixedly connected to the surface of the drive cylinder 21. A positioning plate 23 is fixedly connected to the other end of the mating plate 22 by bolts. The positioning plate 23 is fixedly connected to the upper surface of the support bar 4 by bolts.

[0025] The check servo motor 16 can drive the lead screw 17 to rotate. Since the drive cylinder 21 is threadedly connected to the surface of the lead screw 17, the drive cylinder 21 moves axially along the lead screw 17, and at the same time drives the positioning plate 23 and the support bar 4 to move, thereby clamping the drug delivery tube and preventing the drug liquid inside the tube from flowing back.

[0026] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0027] In this invention, the working steps of the device are as follows: When in use, the equipment is fixedly installed at the liquid check station of the filling production line. The hose for conveying the liquid is inserted into the through hole 14 at the top of the clamp fixing seat 6 on the left side of the equipment. The hose is guided through the notches 5 on each support bar 4 in sequence and finally connected to the filling equipment. Turn on the main power supply of the equipment to supply power to the stop return servo motor 16 and all push electromagnets 11. Initialize the control system such as PLC to ensure that all support bars 4 and clamping plates 12 are in the left-moving loose position. At this time, the hose is unobstructed, all push electromagnets 11 are de-energized, and their output ends (push rods) retract, so as not to interfere with the limit holes 15 on the check plate 10. The syringe bottles move to each filling station along the production line conveyor belt. Bottle detection sensors (such as photoelectric sensors) under each station detect in real time whether there is a bottle at the corresponding station. For stations with bottles: the control system keeps the corresponding push electromagnet 11 de-energized, the push rod remains retracted, and clamping is allowed. For stations without bottles: the control system immediately sends an energizing signal to the corresponding push electromagnet 11, the push rod quickly extends, descends and inserts into the limiting hole 15 of the check plate 10, forming a physical block and prohibiting clamping. When filling the syringe with liquid medicine, the check valve servo motor 16 is activated, driving the lead screw 17 to move all the support bars 4 synchronously to the right. The clamping plate 12 on the support bar 4 also moves to the right. At the bottle-containing station: since the push electromagnet is not activated, the check valve 10 can slide freely to the right. Under the synergistic action of the flexible connector 13 and the tension spring 1302, the clamping plate 12 and the check valve 10 together squeeze the tubing located between them, achieving reliable clamping and preventing backflow of the liquid medicine. At the bottle-free station: since the push rod of the push electromagnet 11 has been inserted into the limiting hole 15, the rightward movement of the check valve 10 is forcibly blocked. The clamping plate 12, which is connected to it through the flexible connector, therefore cannot effectively move to the right and press the tubing, achieving "no clamping without a bottle," avoiding ineffective action and tubing wear. When the next filling cycle is about to begin (for example, when a new empty bottle is in place), the control system reverses the check servo motor 16, driving the entire clamping mechanism to move to the left. All clamping plates 12 and check plates 10 move to the left accordingly, releasing the clamp on the tubing and restoring its unobstructed flow, ready for filling. At the same time, for stations that were previously without bottles, once a new bottle is detected in place, the control system immediately cuts off the power to the corresponding push electromagnet 11, causing the push rod to retract and release the obstruction.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A check valve structure for a needle-shaped bottle, characterized in that: Includes a support plate (1), the upper surface of the support plate (1) is fixedly connected to a slide rail (2), the upper surface of the slide rail (2) is provided with sliders (3) that can slide left and right at equal intervals, the upper surface of the sliders (3) is provided with a support bar (4), the support bar (4) is provided with a notch (5) at the edge along the first direction, the left side of the slide rail (2) is fixedly connected to a stop clamping seat (6), the right side is fixedly connected to a bearing plate (7), the top of the bearing plate (7) is provided with an extension plate (8), and is located at the top of the support bar (4); The top of the extension plate (8) is symmetrically provided with a limiting shaft (9). The surface of the limiting shaft (9) and the top of the extension plate (8) are provided with a check plate (10) that can slide left and right. The right side of the bearing plate (7) is provided with a push electromagnet (11) that works with the check plate (10). The upper surface of the support bar (4) is provided with a clamping plate (12) at the part that abuts against the check plate (10). Flexible connectors (13) are provided on both sides of the check plate (10) and the clamping plate (12). The upper surface of the support plate (1) is provided with a driving component for driving the support bar (4) to move left and right.

2. The anti-backflow structure for a needle-shaped bottle according to claim 1, characterized in that: The clamping fixing seat (6) includes a through hole (14) at the top. The bottom of the clamping fixing seat (6) is fixedly connected to the upper surface of the support plate (1) by bolts. The through hole (14) is located above the notch (5).

3. The anti-backflow structure for a needle-shaped bottle according to claim 2, characterized in that: The support bar (4) is fixedly connected to the top of the slider (3) by bolts, and the bottom of the slider (3) is provided with a groove that is compatible with the slide rail (2); The push electromagnet (11) includes a mounting plate fixedly connected to the right side of the support plate (7), and the push electromagnet (11) is fixedly connected to one side of the mounting plate.

4. The anti-backflow structure for a needle-shaped bottle according to claim 3, characterized in that: The upper surface of the check plate (10) is symmetrically provided with a limiting groove (18) for use with the limiting shaft (9). The flexible connector (13) includes a fixed shaft (1301) on both sides of the check plate (10) and the clamping plate (12), and a tension spring (1302) between the fixed shaft (1301).

5. The anti-backflow structure for a needle-shaped bottle according to claim 4, characterized in that: On the upper surface of the check plate (10), there is a limiting hole (15) between the two limiting grooves (18), and the output end of the push electromagnet (11) is located above the limiting hole (15).

6. The anti-backflow structure for a needle-shaped bottle according to claim 5, characterized in that: The driving component includes a check servo motor (16) fixedly connected to the upper surface of the support plate (1). The output end of the check servo motor (16) is connected to a lead screw (17) via a coupling. A bracket (19) is provided on the outer wall of the lead screw (17) near the coupling. A bracket (20) is provided on the other end of the lead screw (17). The bottoms of the bracket (19) and the bracket (20) are fixedly connected to the upper surface of the support plate (1).

7. The anti-backflow structure for a needle-shaped bottle according to claim 6, characterized in that: On the surface of the lead screw (17), a drive cylinder (21) is threaded between bracket one (19) and bracket two (20). A docking plate (22) is fixedly connected to the surface of the drive cylinder (21). A positioning plate (23) is fixedly connected to the other end of the docking plate (22) by bolts. The positioning plate (23) is fixedly connected to the upper surface of the support bar (4) by bolts.

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