Vacuum filling station for pre-filling and sealing injector

Abstract

The vacuum filling station comprises a machine table, a rotary table is arranged in the center of the machine table, and a discharging base is arranged on the rotary table; the lifting frame is arranged on the machine table, and the filling needle and the vacuum filling assembly are arranged on the lifting frame. The lifting frame is arranged on the machine table, and an assembling transverse plate is horizontally arranged on the lifting frame. The vacuum filling assembly comprises a vacuum sleeve, the vacuum sleeve is fixed to the bottom of the assembling transverse plate, and a vacuum cavity coaxial with the filling needle is formed in the vacuum sleeve; the vacuum cavity consists of a high-position cavity, a middle-position cavity and a low-position cavity which are communicated with one another; the high-position cavity is in butt joint with the assembling transverse plate, and a high-position sealing plug is arranged in the high-position cavity. The middle cavity is communicated with a vacuum pipeline and vacuumizing equipment; the low-position cavity is in butt joint with an injector in the discharging base, and a low-position sealing gasket is arranged in the low-position cavity. According to the vacuum filling station, vacuumizing treatment can be carried out in the filling stage, it is guaranteed that bubbles in a narrow space at the bottom of an injector can be eliminated at the filling station, and the quality of finished products is high.

Description

Technical Field

[0001] The utility model relates to the technical field of medical filling equipment, in particular to a vacuum filling station for prefilled syringes. Background Art

[0002] In the liquid medicine filling industry, the traditional liquid medicine filling and plugging process mainly includes four processes: feeding, filling, plugging and discharging. Therefore, the traditional liquid medicine filling and plugging equipment usually includes four stations corresponding to the four processes, namely, the feeding station, the filling station, the plugging station and the discharging station. Among them, the filling station of the traditional liquid medicine filling and plugging equipment still has the following defects:

[0003] 1) Some traditional filling equipment does not use vacuum filling technology at the filling station, and is unable to eliminate the bubbles inside the syringe during the filling stage, resulting in bubbles still existing in the narrow space at the needle tip at the bottom of the syringe, affecting the quality of the finished product of the liquid medicine filling, and even failing to meet the rigid requirements of the regulatory authorities for liquid medicine production specifications.

[0004] 2) Since the filling station is between the feeding station and the stoppering station, the syringe needs to flow between the various processes, so the filling station is mostly an open station. The open design leads to poor alignment accuracy when the filling component and the syringe are docked, and the airtightness after alignment is also poor, resulting in poor filling quality and low filling efficiency. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a vacuum filling station for a prefilled syringe to overcome the deficiencies in the prior art.

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A vacuum filling station for prefilled syringes comprises a machine platform. A turntable is arranged in the center of the machine platform. The turntable is driven by a turntable servo motor. A material discharge base is arranged on the turntable. Syringes to be filled are placed in the material discharge base.

[0008] The vacuum filling station of the prefilled syringe in this case also includes a lifting frame arranged on the machine platform, a filling needle coaxially arranged on the lifting frame, and a vacuum filling component;

[0009] The lifting frame is vertically arranged on the machine platform and driven to rise and fall by a lifting cylinder. A mounting cross plate is horizontally arranged on the lifting frame, and a mounting shaft hole is vertically penetrated through the mounting cross plate.

[0010] The vacuum filling assembly comprises a vacuum sleeve, which is fixed at the bottom of the assembly horizontal plate and coaxially sealed with the assembly shaft hole on the assembly horizontal plate, and has a built-in vacuum cavity coaxial with the filling needle.

[0011] Furthermore, the vacuum chamber is composed of a high-position chamber, a middle-position chamber and a low-position chamber that are interconnected and combined into an I-shape;

[0012] A high-position cavity, which is sealed and docked with the assembly shaft hole on the assembly horizontal plate, and a high-position sealing plug is arranged in the high-position cavity;

[0013] The middle cavity is connected with the vacuum pipeline and the external vacuum pumping equipment through the docking opening provided on the side wall of the vacuum sleeve;

[0014] The low-position cavity is connected to the syringe in the discharge base, and a low-position sealing gasket is arranged in the low-position cavity.

[0015] Furthermore, the vacuum filling assembly also includes a positioning and alignment ring, which is sealed and locked at the bottom of the vacuum sleeve through a locking piece.

[0016] Preferably, a sealing rubber ring is provided inside the high-position sealing plug.

[0017] Preferably, the low-position sealing gasket is provided with a convex ring protruding toward the nozzle of the syringe.

[0018] Preferably, it also includes a sensor which is arranged on the machine platform and located on one side of the lifting frame.

[0019] Furthermore, the filling needle passes through the assembly shaft hole on the assembly transverse plate and is inserted into the vacuum filling assembly, and rises and falls with the lifting frame.

[0020] Furthermore, an action button group is arranged on the top surface of the machine, and a controller is arranged inside the machine. The controller is electrically connected to the action button group, the turntable servo motor, the lifting cylinder, the external vacuum equipment and the sensor respectively.

[0021] Preferably, a protruding limiting ring is provided on the outer wall of the discharge base.

[0022] Preferably, the inner diameters of the high-position cavity and the low-position cavity are larger than the inner diameter of the middle-position cavity.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] 1) In this case, a vacuum filling station for a prefilled syringe is provided with a vacuum filling component, which performs a vacuum treatment during the filling stage, thereby ensuring that bubbles in the narrow space at the bottom of the syringe needle can be eliminated at the filling station, and the finished product has high quality.

[0025] 2) In the present case, a vacuum filling station for prefilled syringes is provided, and the vacuum chamber of its vacuum filling assembly is composed of a high-position chamber, a middle-position chamber and a low-position chamber formed into an I-shape. A high-position sealing plug is provided in the high-position sealing plug, and a sealing rubber ring is provided in the high-position sealing plug to seal with the filling needle to ensure the air-tightness of the upper part; a low-position sealing gasket with a slightly convex shape that can be elastically deformed is provided in the low-position chamber to ensure the air-tightness of the connection between the syringe bottle mouth and the vacuum chamber, and after the vacuum is broken, the vacuum chamber can also be quickly separated from the syringe without adhesion, thereby further ensuring the filling quality and filling efficiency of the vacuum filling station.

[0026] 3) In the vacuum filling station of a prefilled syringe in this case, when filling the liquid medicine, the syringe is inserted into the vacuum sleeve through the positioning ring, with precise positioning and good air tightness, which further ensures the filling quality and efficiency.

[0027] In order to more clearly understand the present invention, the following will describe the preferred implementation of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a reference diagram of the use state of the utility model;

[0029] Figure 2 It is a schematic diagram of the overall structure of the vacuum filling component in the utility model;

[0030] Figure 3 It is a cross-sectional structural diagram of the vacuum filling component in the utility model;

[0031] Figure 4 It is a structural schematic diagram of the vacuum sleeve in the utility model.

[0032] Figure ID:

[0033] 1-lifting frame, 2-filling needle, 3-sensor, 4-machine table, 5-turntable, 6-discharging base; 11-lifting cylinder, 12-assembly horizontal plate; 71-vacuum sleeve, 72-vacuum chamber; 721-high-position sealing plug, 722-sealing rubber ring, 723-docking opening, 724-vacuum pipeline, 725-low-position sealing gasket, 726-positioning and alignment ring; 100-syringe. DETAILED DESCRIPTION

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0035] In addition, if there are terms such as "first" and "second", they are only used for descriptive purposes, mainly to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components, and cannot be understood as indicating or implying relative importance.

[0036] In addition, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components; for ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0037] See also Figure 1-4 The utility model provides a vacuum filling station for prefilled syringes, including a lifting frame 1 arranged on a machine 4, a filling needle 2 and a vacuum filling assembly coaxially arranged on the lifting frame 1, and a sensor 3 arranged on the machine 4 and located on one side of the lifting frame 1. In actual working conditions, a turntable 5 is arranged in the center of the machine 4, and the turntable 5 is driven by a turntable servo motor. A material discharge base 6 is arranged on the turntable 5, and a syringe 100 to be filled is placed in the material discharge base 6. When the material discharge base 6 flows from the feeding station to the filling station, the material discharge base 6 is located just below the vacuum filling assembly, and the syringe 100 can be filled with liquid medicine after being evacuated by the filling needle 2 and the vacuum filling assembly.

[0038] The lifting frame 1 is vertically arranged on the machine platform 4 and is driven to rise and fall by a lifting cylinder 11. A mounting cross plate 12 is horizontally arranged on the lifting frame 1, and a mounting shaft hole is vertically penetrated through the mounting cross plate 12.

[0039] The filling needle 2 passes through the assembly shaft hole on the assembly horizontal plate 12 and is inserted into the vacuum filling assembly, and rises and falls with the lifting frame 1;

[0040] The vacuum filling assembly includes a vacuum sleeve 71, which is fixed to the bottom of the assembly horizontal plate 12 and is coaxially sealed with the assembly axial hole on the assembly horizontal plate 12, and the vacuum sleeve 71 has a vacuum chamber 72 coaxial with the filling needle 2;

[0041] The vacuum chamber 72 is composed of a high-position chamber, a middle-position chamber and a low-position chamber connected to each other and formed into an I-shape;

[0042] The high-position cavity is sealed and docked with the assembly shaft hole on the assembly horizontal plate 12. A high-position sealing plug 721 is arranged in the high-position cavity. A sealing rubber ring 722 is arranged in the high-position sealing plug 721 to seal and cooperate with the filling needle 2;

[0043] The middle cavity is connected to the vacuum pipeline 724 and an external vacuum pumping device (not shown) through a docking opening 723 provided on the side wall of the vacuum sleeve 71, so that the vacuum cavity 72 can be evacuated into a vacuum;

[0044] The low-position cavity is connected to the syringe 100 in the discharge base 6, and a low-position sealing gasket 725 is arranged in the low-position cavity. The low-position sealing gasket 725 is provided with a convex ring slightly protruding toward the nozzle of the syringe 100, and the convex ring ensures the airtightness of the vacuum sleeve 71 and the syringe 100; preferably, in this embodiment, the low-position sealing gasket 725 is a silicone gasket;

[0045] Furthermore, the vacuum filling assembly also includes a positioning and alignment ring 726, which is sealed and locked at the bottom of the vacuum sleeve 71 through a locking piece; the positioning and alignment ring 726 has two functions. First, it is used to position the low-position sealing gasket 725 in the low-position cavity; second, it is used to allow the bottle mouth of the syringe 100 to be inserted and accurately aligned, ensuring that the bottle mouth of the syringe 100 is sealed and connected to the low-position sealing gasket 725, thereby further ensuring the airtightness of the liquid medicine filling operation.

[0046] The sensor 3 is used to sense whether the discharge base 6 on the turntable 5 is accurately positioned and aligned with the vacuum sleeve 71 when it is transferred to the filling station, so as to ensure that the syringe 100 in the discharge base 6 is coaxially located directly below the vacuum sleeve 71 .

[0047] Furthermore, the machine 4 is provided with an action button group on its top surface; a controller is provided inside the machine 4, and the controller is electrically connected to the action button group, the turntable servo motor, the lifting cylinder 11, the external vacuum pumping device and the sensor 3. Under the control of the controller, the turntable 5 can be quantitatively rotated 90 degrees counterclockwise at a time, and the syringe 100 placed in the discharge base 6 is transferred between the feeding station, the filling station, the plugging station and the discharge station in sequence.

[0048] Preferably, in this embodiment, the outer wall of the discharge base 6 has a protruding limiting ring, so that the discharge base 6 can be vertically penetrated on the turntable 5 and is limited by the limiting ring.

[0049] Preferably, in this embodiment, the inner diameters of the high-position cavity and the low-position cavity are larger than the inner diameter of the middle-position cavity, so that the vacuum cavity 72 is in an I-shape.

[0050] The vacuum filling station of a prefilled syringe in this case has the following working principle or workflow in actual working conditions:

[0051] 1. When the discharge base 6 rotates to the filling station, the lifting frame 1 moves downward with the filling needle 2 and the filling assembly to press the syringe 100 in the discharge base 6, so that the bottle mouth of the syringe 100 docks with the vacuum cavity 72 of the vacuum sleeve 71, and the slightly protruding convex ring of the low-position sealing gasket 725 in the vacuum sleeve 71 is flattened and sealed by the syringe 100, so that the vacuum cavity 72 of the vacuum sleeve 71 docks with the inner cavity of the syringe 100 to form a closed space, and the external vacuum pumping equipment can evacuate the vacuum cavity 72 of the vacuum sleeve 71 and the syringe 100 through the vacuum pipeline 724.

[0052] 2. After evacuation, the syringe 100 is filled with liquid medicine by inserting the filling needle 2 into the syringe 100.

[0053] 3. After the liquid filling work is completed, the lifting frame 1 moves upward with the filling needle 2 and the filling assembly and separates from the discharge base 6 and the syringe 100.

[0054] 4. Then, driven by the turntable 5, the syringe 100 filled with the liquid medicine is transferred to the subsequent stoppering station.

[0055] Compared with the prior art, a vacuum filling station for a prefilled syringe in this case is provided with a vacuum filling assembly, which performs a vacuum treatment during the filling stage, thereby ensuring that bubbles in the narrow space at the bottom of the needle of the syringe can be eliminated at the filling station, and the finished product has high quality.

[0056] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A vacuum filling station for prefilled syringes, comprising a machine platform (4), a turntable (5) being arranged in the center of the machine platform (4), the turntable (5) being driven by a turntable servo motor, a material discharge base (6) being arranged on the turntable (5), a syringe (100) to be filled being placed in the material discharge base (6), characterized in that: It also includes a lifting frame (1) arranged on a machine platform (4), a filling needle (2) coaxially arranged on the lifting frame (1), and a vacuum filling component; The lifting frame (1) is vertically arranged on the machine platform (4) and is driven to rise and fall by a lifting cylinder (11). A mounting cross plate (12) is horizontally arranged on the lifting frame (1), and a mounting shaft hole is vertically penetrated through the mounting cross plate (12); The vacuum filling assembly comprises a vacuum sleeve (71), which is fixed to the bottom of the assembly horizontal plate (12) and is coaxially sealed with the assembly axial hole on the assembly horizontal plate (12), and has a built-in vacuum chamber (72) coaxial with the filling needle (2).

2. A vacuum filling station for prefilled syringes according to claim 1, characterized in that: The vacuum chamber (72) is composed of a high-position chamber, a middle-position chamber and a low-position chamber that are interconnected and combined into an I-shape; A high-position cavity, which is sealed and docked with the assembly shaft hole on the assembly transverse plate (12), and a high-position sealing plug (721) is arranged in the high-position cavity; A middle cavity, which is connected to a vacuum pipeline (724) and an external vacuum pumping device through a docking opening (723) provided on a side wall of the vacuum sleeve (71); The low-position cavity is connected to the syringe (100) in the discharge base (6), and a low-position sealing gasket (725) is arranged in the low-position cavity.

3. A vacuum filling station for a prefilled syringe according to claim 2, characterized in that: The vacuum filling assembly further comprises a positioning and alignment ring (726), wherein the positioning and alignment ring (726) is sealed and locked at the bottom of the vacuum sleeve (71) via a locking member.

4. A vacuum filling station for a prefilled syringe according to claim 3, characterized in that: A sealing rubber ring (722) is arranged inside the high-position sealing plug (721).

5. A vacuum filling station for a prefilled syringe according to claim 3, characterized in that: The low-position sealing gasket (725) is provided with a convex ring protruding toward the nozzle of the syringe (100).

6. A vacuum filling station for a prefilled syringe according to claim 3, characterized in that: It also includes a sensor (3) which is arranged on the machine platform (4) and located on one side of the lifting frame (1).

7. A vacuum filling station for a prefilled syringe according to claim 3, characterized in that: The filling needle (2) passes through the assembly shaft hole on the assembly transverse plate (12) and is inserted into the vacuum filling component, and rises and falls with the lifting frame (1).

8. A vacuum filling station for a prefilled syringe according to claim 3, characterized in that: An action button group is arranged on the top surface of the machine platform (4), and a controller is arranged inside the machine platform (4). The controller is electrically connected to the action button group, the turntable servo motor, the lifting cylinder (11), the external vacuum pumping equipment and the sensor (3).

9. A vacuum filling station for a prefilled syringe according to claim 3, characterized in that: The outer wall of the discharge base (6) is provided with a protruding limiting ring.

10. A vacuum filling station for prefilled syringes according to claim 3, characterized in that: The inner diameters of the high-position cavity and the low-position cavity are greater than the inner diameter of the middle-position cavity.

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