Liquid can rotary cap nitrogen filling mechanism

Abstract

The utility model discloses a kind of nitrogen filling mechanism of liquid canning screw cap machine, including conveying mesh belt, screw cap device, nitrogen replacement device, plastic cover nitrogen replacement device and nitrogen protection device. Conveying mesh belt is sequentially provided with nitrogen filling station and screw cap station along its conveying direction;Nitrogen replacement device is set on nitrogen filling station, including nitrogen replacement passageway, for replacing the air in the container to be screwed cap;Plastic cover nitrogen replacement device is set at the front end of screw cap station, for nitrogen injection inside plastic cover, replace the air inside plastic cover;Nitrogen protection device includes the nitrogen protection passageway of nitrogen replacement passageway butt joint, for isolating external air in the container conveying process to be screwed cap. The nitrogen filling mechanism optimizes nitrogen filling operation, reduces the nitrogen leakage and external air infiltration problem that appears in the conveying process of the container to be screwed cap after nitrogen filling, and plastic cover nitrogen replacement device effectively avoids the air inside plastic cover into the container to be screwed cap, so that the residual oxygen content after sealing is effectively controlled.

Description

Technical Field

[0001] This utility model relates to the field of pharmaceutical equipment technology, and in particular to a nitrogen filling mechanism for a liquid can filling and capping machine. Background Technology

[0002] In the pharmaceutical manufacturing process, especially for oxygen-sensitive drugs, nitrogen purging is a crucial step in ensuring drug quality. Nitrogen purging is typically performed before sealing the drug container. Its purpose is to replace the oxygen in the container with nitrogen gas, creating a low-oxygen environment and reducing the oxidative or degradative effects of oxygen on the drug components.

[0003] Residual oxygen content is a key indicator when evaluating the effectiveness of nitrogen purging. Current nitrogen purging procedures typically involve directly filling the drug container with nitrogen using a syringe and sealing it with a screw cap. However, this method only fills the container with nitrogen; during transport after purging, nitrogen can easily escape, and outside air can easily seep into the container. Furthermore, during the capping process, air inevitably enters the container, making it impossible to effectively control the residual oxygen content after sealing, thus increasing the risk of potential safety hazards to the drug. Utility Model Content

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a nitrogen filling mechanism for a liquid filling and capping machine.

[0005] The technical solution provided by this utility model is as follows:

[0006] A nitrogen filling mechanism for a liquid can capping machine includes:

[0007] The conveyor belt is used to transport containers to be capped, and nitrogen filling station and capping station are arranged sequentially along its conveying direction.

[0008] A capping device is installed at the capping station;

[0009] A nitrogen purging device is installed at the nitrogen filling station, including a nitrogen purging channel, for purging the air in the container to be capped;

[0010] A nitrogen purging device for plastic caps is installed at the front end of the capping station and is used to inject nitrogen into the plastic cap to replace the air inside the plastic cap.

[0011] The nitrogen protection device includes a nitrogen protection channel that is connected to the nitrogen replacement channel, used to isolate outside air during the transportation of the container to be capped.

[0012] Furthermore, the nitrogen replacement device includes:

[0013] The cover has a nitrogen replacement channel formed below it;

[0014] The first type of nitrogen injection device is installed at the top of the cover and is used to inject nitrogen into the nitrogen replacement channel;

[0015] The first type of exhaust port is located on both sides of the cover and is used to exhaust the air in the nitrogen replacement channel.

[0016] Furthermore, the cover includes two side plates arranged opposite each other, which are respectively installed on opposite sides of the conveyor belt, and the installation height is adjustable;

[0017] A set of guardrails is provided between the two side panels, and the distance between the two guardrails is adjustable.

[0018] Furthermore, the first type of nitrogen injection device includes:

[0019] Type I nitrogen interface;

[0020] The first type of nitrogen chamber is connected to the first type of nitrogen interface;

[0021] The first type of nitrogen outlet is used to connect the first type of nitrogen chamber with the nitrogen replacement channel.

[0022] Furthermore, the nitrogen protection device includes:

[0023] An arc-shaped cover, with the nitrogen protection channel formed below it;

[0024] The second type of nitrogen injection device includes a second type of nitrogen interface, a second type of nitrogen chamber connected to the second type of nitrogen interface, and a second type of nitrogen outlet disposed on the second type of nitrogen chamber. The second type of nitrogen interface is disposed on the side of the arc-shaped cover.

[0025] Furthermore, the arc-shaped cover includes an inner guide plate and an outer guide plate, wherein the outer guide plate is an acrylic plate.

[0026] Furthermore, the nitrogen protection device also includes a mounting bracket, through which the arc-shaped cover is mounted, and the mounting height is adjustable.

[0027] Furthermore, the nitrogen purging device for the plastic cap includes:

[0028] Nitrogen blowing head;

[0029] Nitrogen flows out of the shroud and connects with the nitrogen blowing head, with a vertically upward air outlet at the top.

[0030] Furthermore, the arc-shaped cover and the nitrogen flow outlet cover are an integral structure.

[0031] Furthermore, there are multiple air vents, each with a diameter of 0.5 mm and a distance of 5 mm between the centers of two adjacent air vents.

[0032] Compared with the prior art, the nitrogen filling mechanism of the liquid filling and capping machine provided in this embodiment of the utility model has at least the following technical effects:

[0033] The nitrogen filling mechanism of the liquid can capping machine includes a conveyor belt, a capping device, a nitrogen purging device, a plastic cap nitrogen purging device, and a nitrogen protection device. The conveyor belt transports containers to be capped, with nitrogen filling and capping stations sequentially arranged along its conveying direction. The capping device is located at the capping station. The nitrogen purging device, including a nitrogen purging channel, is used to replace the air inside the container to be capped at the nitrogen filling station. The plastic cap nitrogen purging device is located at the front end of the capping station and injects nitrogen into the plastic cap to replace the air inside. The nitrogen protection device includes a nitrogen protection channel connected to the nitrogen purging channel, which isolates the container from outside air during transport. This design optimizes the nitrogen filling process through the segmented operation of the nitrogen purging device, nitrogen protection device, and plastic cap nitrogen purging device, reducing nitrogen escape and outside air infiltration during transport after filling, thus maintaining a stable nitrogen concentration inside the container. Furthermore, the nitrogen purging device for plastic caps can inject nitrogen into the inside of the plastic cap before sealing to replace the air inside, effectively preventing air from entering the container to be capped. This ensures effective control of the residual oxygen content after sealing. Testing has shown that the residual oxygen content can be stably controlled below 3%, improving the precision and stability of residual oxygen content control, thereby enhancing the consistency of drug quality and reducing potential safety hazards. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the nitrogen replacement device in one embodiment of the present invention;

[0036] Figure 2 This is a cross-sectional structural schematic diagram of the nitrogen replacement device in one embodiment of the present invention;

[0037] Figure 3This is a schematic diagram of the structure of the nitrogen protection device and the plastic cap nitrogen replacement device in one embodiment of the present invention;

[0038] Figure 4 This is a bottom view of the nitrogen protection device and the nitrogen replacement device with the plastic cap in one embodiment of the present invention.

[0039] Figure label:

[0040] 10. Conveyor belt; 20. Container to be capped; 30. Nitrogen purging device; 31. Nitrogen purging channel; 32. Cover; 321. Side plate; 322. Guardrail; 331. Type I nitrogen inlet; 332. Type I nitrogen chamber; 333. Type I nitrogen outlet; 41. Nitrogen blowing head; 42. Nitrogen outlet from the cover; 421. Vent; 51. Nitrogen protection channel; 52. Arc-shaped cover; 521. Inner guide plate; 522. Outer guide plate; 531. Type II nitrogen inlet; 532. Type II nitrogen chamber; 533. Type II nitrogen outlet; 54. Mounting bracket. Detailed Implementation

[0041] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0042] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0043] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0045] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this utility model can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0046] Please refer to the attached document. Figure 1 To be continued Figure 4 As shown, an embodiment of this utility model provides a nitrogen filling mechanism for a liquid can capping machine, including a conveyor belt 10, a capping device, a nitrogen purging device 30, a plastic cap nitrogen purging device, and a nitrogen protection device. The conveyor belt 10 is used to transport containers 20 to be capped. A nitrogen filling station and a capping station are sequentially arranged along the conveying direction of the conveyor belt 10. The capping device is located at the capping station. The nitrogen purging device 30 is located at the nitrogen filling station and includes a nitrogen purging channel 31. The nitrogen purging device 30 is used to purge the air inside the container 20 to be capped. The plastic cap nitrogen purging device is located at the front end of the capping station and is used to spray nitrogen into the plastic cap to purge the air inside the plastic cap. The nitrogen protection device includes a nitrogen protection channel 51 that connects to the nitrogen purging channel 31. The nitrogen protection device is used to isolate external air during the transport of the container 20 to be capped. The nitrogen injection volume in the nitrogen replacement channel 31 and the nitrogen protection channel 51, as well as the nitrogen injection volume of the nitrogen replacement device for the plastic cap, can be independently adjusted according to actual needs to optimize nitrogen utilization efficiency. According to statistics, the working speed of the nitrogen filling mechanism of this liquid bottle capping machine can reach 60 to 120 bottles / minute.

[0047] In this embodiment, the nitrogen filling mechanism of the liquid can capping machine includes a conveyor belt 10, a capping device, a nitrogen purging device 30, a plastic cap nitrogen purging device, and a nitrogen protection device. The conveyor belt 10 is used to transport the container 20 to be capped. The conveyor belt 10 is provided with a nitrogen filling station and a capping station in sequence along its conveying direction. The capping device is located at the capping station. The nitrogen purging device 30 is located at the nitrogen filling station. The nitrogen purging device 30 includes a nitrogen purging channel 31 and is used to purge the air inside the container 20 to be capped. The plastic cap nitrogen purging device is located at the front end of the capping station and is used to spray nitrogen into the plastic cap to purge the air inside the plastic cap. The nitrogen protection device includes a nitrogen protection channel 51 that is connected to the nitrogen purging channel 31. The nitrogen protection device is used to isolate the outside air during the transport of the container 20 to be capped. This design optimizes the nitrogen filling process through the segmented operation of the nitrogen replacement device 30, the nitrogen protection device, and the cap nitrogen replacement device. This reduces nitrogen escape and external air infiltration during transport of the container 20 to be capped, ensuring a stable nitrogen concentration within the container. Furthermore, the cap nitrogen replacement device injects nitrogen into the plastic cap before sealing to replace any air inside, effectively preventing air from entering the container 20 and thus effectively controlling the residual oxygen content after sealing. Testing shows that the residual oxygen content can be stably controlled below 3%, improving the accuracy and stability of residual oxygen content control, thereby enhancing the consistency of drug quality and reducing potential safety hazards.

[0048] In some optional embodiments, the nitrogen replacement device 30 includes a cover 32, a first type of nitrogen injection device, and a first type of exhaust port. A nitrogen replacement channel 31 is formed below the cover 32; the first type of nitrogen injection device is disposed at the top of the cover 32 for injecting nitrogen into the nitrogen replacement channel 31; the first type of exhaust port is disposed on both sides of the cover 32 for discharging air from the nitrogen replacement channel 31.

[0049] In some optional embodiments, the hood 32 can be divided into multiple segments along the conveying direction of the conveyor belt 10, each segment corresponding to a nitrogen replacement channel. The nitrogen flow rate within each nitrogen replacement channel can be independently adjusted. In practical applications, a segmented control method can be used to adjust the nitrogen flow rate within each nitrogen replacement channel segment according to the target residual oxygen level, thereby precisely controlling the residual oxygen rate. For example, in a specific embodiment, the hood 32 is divided into two segments along the conveying direction of the conveyor belt 10, corresponding to two nitrogen replacement channels. The nitrogen flow rate of each nitrogen replacement channel segment can be controlled independently to meet the nitrogen flow rate requirements of different areas, thereby further optimizing the nitrogen replacement process and improving the accuracy of residual oxygen rate control. Specifically, each nitrogen replacement channel segment is equipped with a flow meter for real-time monitoring of the nitrogen flow rate. The corresponding first-type nitrogen injection device is equipped with a needle valve to precisely adjust the nitrogen flow rate, thereby achieving independent control of each nitrogen replacement channel segment.

[0050] In some optional embodiments, the cover 32 includes two oppositely arranged side plates 321, which are respectively installed on opposite sides of the conveyor belt 10, and the installation height of the two side plates 321 is adjustable. For example, the side plates 321 are provided with adjustment holes along their height direction, and the installation height of the side plates 321 can be adjusted by selecting an appropriate position for the adjustment holes. After adjustment, they can be fixed using bolts.

[0051] It should be further explained that a set of guardrails 322 is provided between the two side plates 321, and the distance between the two guardrails 322 is adjustable. Specifically, multiple mounting holes are provided on the side plates 321, and movable rods are slidably installed in the mounting holes. One end of each movable rod is connected to a guardrail 322. By adjusting the sliding position of the movable rod, the distance between the two guardrails 322 can be adjusted. During adjustment, the movable rods can be precisely adjusted using an adjusting device, such as a pneumatic / hydraulic device.

[0052] The cover 32 includes two opposing side plates 321, which are respectively installed on opposite sides of the conveyor belt 10. The installation height of the two side plates 321 is adjustable, and a set of guardrails 322 is provided between the two side plates 321. The distance between the two guardrails 322 is adjustable, allowing the cover 32 to flexibly adapt to containers 20 of different sizes to be capped. When the size of the container 20 to be capped changes, the operator only needs to adjust the height of the side plates 321 and the distance between the two guardrails 322 to adapt the cover 32 to the container 20 to be capped, without having to replace the entire nitrogen purging device 30, thereby improving the versatility of the nitrogen purging device 30.

[0053] In some optional embodiments, the first type of nitrogen injection device includes a first type of nitrogen interface 331, a first type of nitrogen chamber 332, and a first type of nitrogen outlet 333; the first type of nitrogen chamber 332 is connected to the first type of nitrogen interface 331; the first type of nitrogen outlet 333 is used to connect the first type of nitrogen chamber 332 to the nitrogen replacement channel 31, and the first type of nitrogen outlet 333 can be located at the bottom of the first type of nitrogen chamber 332. Specifically, when the container 20 to be capped on the conveyor belt 10 is conveyed to the nitrogen replacement channel 31, nitrogen is injected into the first type of nitrogen chamber 332 through the first type of nitrogen interface 331. The nitrogen is depressurized in the first type of nitrogen chamber 332 and flows evenly through the first type of nitrogen outlet 333 into the nitrogen replacement channel 31, thereby replacing the air in the container 20 to be capped. The replaced air is discharged outside the nitrogen replacement channel 31 through the first type of exhaust port. Compared with the existing technology of directly filling the drug container with nitrogen using a syringe, this embodiment avoids the direct impact of high-pressure nitrogen on the liquid inside the drug container by depressurizing and uniformly releasing nitrogen in the first type of nitrogen chamber 332, thereby reducing the risk of drug splashing.

[0054] In some alternative embodiments, the first type of nitrogen interface 331 can be a pneumatic quick connector, which is quick to connect and easy to assemble and disassemble.

[0055] In some alternative embodiments, a plurality of mounting holes on the side plate 321 are spaced apart from the moving rod, through which the displaced air can be discharged to the outside of the nitrogen replacement channel 31.

[0056] In some optional embodiments, the nitrogen protection device includes an arc-shaped cover 52 and a second type of nitrogen injection device. A nitrogen protection channel 51 is formed below the arc-shaped cover 52; the second type of nitrogen injection device includes a second type of nitrogen interface 531, a second type of nitrogen chamber 532 communicating with the second type of nitrogen interface 531, and a second type of nitrogen outlet 533 disposed on the second type of nitrogen chamber 532. The second type of nitrogen interface is disposed on the side of the arc-shaped cover 52, the second type of nitrogen chamber 532 is located above the nitrogen protection channel 51, and the second type of nitrogen outlet 533 is disposed at the bottom of the second type of nitrogen chamber 532. Specifically, when the container 20 to be capped leaves the nitrogen replacement channel 31 and enters the nitrogen protection channel 51 through the rotating impeller, the second type of nitrogen interface 531 injects nitrogen into the second type of nitrogen chamber 532. The nitrogen is depressurized in the second type of nitrogen chamber 532 and flows evenly through the second type of nitrogen outlet 533 into the nitrogen protection channel 51, so as to form a nitrogen protection barrier in the nitrogen protection channel 51, thereby effectively isolating the infiltration of outside air and keeping the nitrogen concentration in the nitrogen protection channel 51 stable.

[0057] In some optional embodiments, the arc-shaped cover 52 includes an inner guide plate 521 and an outer guide plate 522; the outer guide plate 522 is an acrylic plate. The acrylic plate has transparent properties, which facilitates the operator to observe the operating status of the container 20 to be capped in real time.

[0058] In some optional embodiments, the nitrogen protection device further includes a mounting bracket 54, through which the arc-shaped cover 52 is mounted, and the mounting height is adjustable. The mounting bracket 54 has an oblong hole along its height direction, through which the mounting height of the mounting bracket 54 can be easily adjusted, thereby allowing the arc-shaped cover 52 to flexibly adapt to containers 20 of different sizes to be capped.

[0059] In some optional embodiments, the nitrogen replacement device for the plastic cap includes a nitrogen blowing head 41 and a nitrogen outlet hood 42; the nitrogen outlet hood 42 is connected to the nitrogen blowing head 41, and a vertically upward vent 421 is provided at the top of the nitrogen outlet hood 42. Before the plastic cap is sealed, the nitrogen blowing head 41 operates, and nitrogen gas is injected into the interior of the plastic cap through the vent 421, thereby replacing the air inside the plastic cap. This process effectively reduces the residual oxygen inside the plastic cap.

[0060] In some alternative embodiments, the arc-shaped cover 52 and the nitrogen outlet cover 42 are an integral structure.

[0061] In some optional embodiments, there are multiple vents 421, each with a diameter of 0.5 mm and a distance of 5 mm between the centers of two adjacent vents 421. This design allows nitrogen to be evenly distributed and effectively displace the air inside the plastic cap.

[0062] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A nitrogen filling mechanism of a liquid can rotary cap machine, characterized by, include: The conveyor belt is used to transport containers to be capped, and nitrogen filling station and capping station are arranged sequentially along its conveying direction. A capping device is installed at the capping station; A nitrogen purging device is installed at the nitrogen filling station, including a nitrogen purging channel, for purging the air in the container to be capped; A nitrogen purging device for plastic caps is installed at the front end of the capping station and is used to inject nitrogen into the plastic cap to replace the air inside the plastic cap. The nitrogen protection device includes a nitrogen protection channel that is connected to the nitrogen replacement channel, used to isolate outside air during the transportation of the container to be capped.

2. The liquid canning flip top machine nitrogen charging mechanism of claim 1, wherein, The nitrogen replacement device includes: The cover has a nitrogen replacement channel formed below it; The first type of nitrogen injection device is installed at the top of the cover and is used to inject nitrogen into the nitrogen replacement channel; The first type of exhaust port is located on both sides of the cover and is used to exhaust the air in the nitrogen replacement channel.

3. The liquid canning flip top machine nitrogen charging mechanism of claim 2, wherein, The cover includes two side plates arranged opposite each other, which are respectively installed on opposite sides of the conveyor belt, and the installation height is adjustable; A set of guardrails is provided between the two side panels, and the distance between the two guardrails is adjustable.

4. The liquid canning flip top machine nitrogen charging mechanism of claim 2, wherein, The first type of nitrogen injection device includes: Type I nitrogen interface; The first type of nitrogen chamber is connected to the first type of nitrogen interface; The first type of nitrogen outlet is used to connect the first type of nitrogen chamber with the nitrogen replacement channel.

5. The liquid canning flip top machine nitrogen charging mechanism of claim 1, wherein, The nitrogen protection device includes: An arc-shaped cover, with the nitrogen protection channel formed below it; The second type of nitrogen injection device includes a second type of nitrogen interface, a second type of nitrogen chamber connected to the second type of nitrogen interface, and a second type of nitrogen outlet disposed on the second type of nitrogen chamber. The second type of nitrogen interface is disposed on the side of the arc-shaped cover.

6. The liquid canning flip top machine nitrogen charging mechanism of claim 5, wherein, The arc-shaped cover includes an inner guide plate and an outer guide plate, wherein the outer guide plate is an acrylic plate.

7. The liquid canning flip top machine nitrogen charging mechanism of claim 5, wherein, The nitrogen protection device also includes a mounting bracket, through which the arc-shaped cover is mounted, and the mounting height is adjustable.

8. The liquid canning flip top machine nitrogen charging mechanism of claim 5, wherein, The nitrogen purging device for the plastic cap includes: Nitrogen blowing head; Nitrogen flows out of the shroud and connects with the nitrogen blowing head, with a vertically upward air outlet at the top.

9. The liquid canning flip top machine nitrogen charging mechanism of claim 8, wherein, The arc-shaped cover and the nitrogen flow outlet cover are an integral structure.

10. The liquid canning flip top machine nitrogen charging mechanism of claim 8, wherein, The number of air vents is multiple, the diameter of each air vent is 0.5 mm, and the distance between the centers of two adjacent air vents is 5 mm.

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