Nitrogen filling and plug pressing device and nitrogen filling and plug production line

Abstract

The utility model discloses a kind of nitrogen filling pressure plug device and nitrogen filling pressure plug production line, it is related to medical equipment technical field.Nitrogen filling pressure plug device includes outer tube, inner tube, pressure plug shaft, plug seat, sealing joint, sealing assembly, vacuum total interface, nitrogen total interface and nitrogen distributor;Inner tube is coaxial with outer tube and is slidably arranged;Pressure plug shaft is coaxially arranged in inner tube;Plug seat is arranged at the lower end of pressure plug shaft;Sealing joint is arranged at the lower end of outer tube;Sealing assembly is arranged between outer tube and inner tube;Vacuum total interface and nitrogen total interface are arranged on the lateral wall of outer tube;Nitrogen distributor is installed in outer tube, with nitrogen inlet and multiple nitrogen outlets, multiple nitrogen outlets are arranged towards bottle mouth, nitrogen can be filled to bottle mouth simultaneously, improve nitrogen filling speed, and efficiently replace air in bottle.Meanwhile, nitrogen filling and pressure plug are completed in the same space, the transfer process of bottle between two stations is saved, external oxygen is effectively avoided to re-enter bottle, and residual oxygen control effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, and in particular to a nitrogen-filling plug device and a nitrogen-filling plug production line. Background Technology

[0002] Glass bottles, as a traditional form of infusion packaging, have numerous advantages. Firstly, among all infusion packaging materials, glass bottles possess superior stability, exhibiting excellent water, oxygen, and light barrier properties, as well as outstanding antioxidant properties and good compatibility with the medication. Therefore, many medications, especially nutritional and therapeutic infusions (such as amino acid solutions and fat emulsions), are typically packaged in glass bottles. However, these nutritional and therapeutic medications have extremely strict requirements regarding the oxygen content within the bottle. The level of residual oxygen directly affects the shelf life of the medication; therefore, strictly controlling the residual oxygen level in each infusion bottle becomes a key requirement in equipment performance and technical specifications.

[0003] In existing technologies, after filling, the infusion bottles need to enter a nitrogen-filling station to effectively replace the oxygen inside the bottle. However, existing nitrogen-filling devices typically only have one nitrogen outlet, resulting in a slow filling speed and difficulty in efficiently replacing the air inside the bottle. Furthermore, in existing technologies, after nitrogen filling, the bottles need to be transported to the stoppering station. During this transport process, external oxygen can easily re-enter the bottle, making it difficult to control the residual oxygen level below 0.5%, failing to meet stricter residual oxygen control requirements, and thus affecting the shelf life and quality stability of the medication. Utility Model Content

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a nitrogen-filled plugging device and a nitrogen-filled plugging production line, which aims to meet more stringent residual oxygen control requirements.

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

[0006] A nitrogen-filled plugging device, comprising:

[0007] outer cylinder;

[0008] The inner cylinder is coaxial with the outer cylinder and can slide relative to it.

[0009] The pressure plug shaft is coaxially disposed in the inner cylinder;

[0010] A stopper holder is located at the lower end of the stopper shaft;

[0011] A sealing joint is located at the lower end of the outer cylinder;

[0012] A sealing assembly is disposed between the outer cylinder and the inner cylinder;

[0013] The main vacuum port is located on the side wall of the outer cylinder and below the sealing assembly;

[0014] The nitrogen main inlet is located on the side wall of the outer cylinder and above the sealing joint;

[0015] A nitrogen distributor is installed inside the outer cylinder and has a nitrogen inlet and multiple nitrogen outlets. The nitrogen inlet is connected to the main nitrogen interface, and the multiple nitrogen outlets are arranged facing the bottle opening.

[0016] Furthermore, the nitrogen distributor is a nitrogen distribution ring, the nitrogen outlet is an oblique hole, and they are evenly arranged around the nitrogen distribution ring. The extension line of the center of the oblique hole intersects the central axis of the bottle mouth at the bottle mouth.

[0017] Furthermore, the nitrogen distribution ring is adapted to the inner wall of the outer cylinder, the outer cylinder has a threaded hole, and the nitrogen distribution ring is connected to the outer cylinder by a bolt passing through the threaded hole.

[0018] Furthermore, the inner cylinder includes:

[0019] The inner cylinder body is connected to the first lifting device and has a stepped surface inside;

[0020] A locking end cap is provided at the bottom end of the inner cylinder body. The plug shaft is coaxially provided in the inner cylinder body and extends downward through the locking end cap. The plug-taking seat is provided at the end of the plug shaft away from the inner cylinder body.

[0021] The pressure spring is connected at one end to the top of the pressure spring shaft and at the other end to the stepped surface.

[0022] Furthermore, the outer cylinder includes:

[0023] outer cylinder body;

[0024] A connecting sleeve is disposed at the lower end of the outer cylinder body, a sealing joint is disposed at the lower end of the connecting sleeve, and a sealing assembly is disposed between the connecting sleeve and the inner cylinder.

[0025] Furthermore, the connecting sleeve includes:

[0026] An upper connecting sleeve is disposed at the lower end of the outer cylinder body;

[0027] An intermediate connecting sleeve, connected to the lower end of the upper connecting sleeve, includes a first part located between the upper connecting sleeve and the inner cylinder and a second part located at the lower end of the upper connecting sleeve, and is connected to the inner cylinder through the sealing assembly;

[0028] The lower connecting sleeve is located at the lower end of the intermediate connecting sleeve, the sealing joint is located at the lower end of the lower connecting sleeve, and the nitrogen main interface is located on the side wall of the lower connecting sleeve.

[0029] Furthermore, a bottle-body sealing spring is provided between the upper connecting sleeve and the middle connecting sleeve;

[0030] And / or, the lower end of the upper connecting sleeve is provided with a limiting sleeve, and the middle connecting sleeve passes through the limiting sleeve.

[0031] Furthermore, the sealing assembly includes:

[0032] The end cap is clamped and positioned at the upper end of the intermediate connecting sleeve.

[0033] A sliding sleeve is disposed between the first part and the inner cylinder;

[0034] The first shaft uses a Glad ring, which is disposed between the clamping end cap and the sliding sleeve;

[0035] A sealing ring fixing seat is disposed between the second part and the inner cylinder;

[0036] A U-shaped polyurethane sealing ring is disposed on the upper end of the sealing ring fixing seat;

[0037] A pressure pad is disposed at the upper end of the U-shaped polyurethane sealing ring;

[0038] The second axis uses a Gladius ring, which is positioned at the upper end of the pressure pad.

[0039] Furthermore, the outer cylinder is connected to the second lifting device;

[0040] And / or, the sealing joint includes a sealing end cap and a bottle body sealing sleeve, the sealing end cap being connected to the lower end of the outer cylinder, and the bottle body sealing sleeve being disposed inside the sealing end cap.

[0041] On the other hand, the present invention also provides a nitrogen-filled plug production line, including the nitrogen-filled plug device described in any of the above embodiments.

[0042] Compared with the prior art, the nitrogen-filled plugging device and nitrogen-filled plugging production line provided by this utility model embodiment have at least the following technical effects:

[0043] The nitrogen-filling and stoppering device includes an outer cylinder, an inner cylinder, a stoppering shaft, a stopper take-up seat, a sealing joint, a sealing assembly, a nitrogen main inlet, and a nitrogen distribution ring. The inner cylinder and outer cylinder are coaxial and can slide relative to each other. The stoppering shaft is coaxially positioned within the inner cylinder. The stopper take-up seat is located at the lower end of the stoppering shaft. The sealing joint is located at the lower end of the outer cylinder. The sealing assembly is positioned between the outer and inner cylinders. The nitrogen main inlet is located on the side wall of the outer cylinder, above the sealing joint. The nitrogen distributor is installed inside the outer cylinder and has a nitrogen inlet and multiple nitrogen outlets. The nitrogen inlet is connected to the nitrogen main inlet, and the multiple nitrogen outlets face the bottle opening. This structural design allows multiple nitrogen outlets to simultaneously fill the bottle opening with nitrogen, increasing the filling speed and efficiently replacing the air inside the bottle. Furthermore, nitrogen filling and stoppering are completed within the same space, eliminating the need to transfer the bottle between two stations, effectively preventing external oxygen from re-entering the bottle, and improving residual oxygen control. Actual testing showed that the residual oxygen content in the bottle could be successfully controlled below 0.5%, meeting stricter requirements for residual oxygen control, thereby extending the shelf life of the medicine and improving the stability of the medicine's quality. Attached Figure Description

[0044] 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.

[0045] Figure 1 This is a schematic diagram of the working state structure of the nitrogen-filled plug device of this utility model in some embodiments;

[0046] Figure 2 The diagram shows the working state structure of the nitrogen-filled plug device of this utility model in some other embodiments.

[0047] Figure label:

[0048] 1. Outer cylinder; 11. Threaded hole; 12. Outer cylinder body; 131. Upper connecting sleeve; 132. Middle connecting sleeve; 133. Lower connecting sleeve; 134. Bottle body sealing spring; 135. Limiting sleeve; 2. Inner cylinder; 21. Inner cylinder body; 22. Locking end cap; 23. Stopper buffer spring; 3. Stopper shaft; 4. Stopper take-off seat; 5. Sealing joint; 51. Sealing end cap; 52. Bottle body sealing sleeve; 6. Sealing assembly; 61. Pressing end cap; 62. Sliding sleeve; 63. First shaft Glyd ring; 64. Sealing ring fixing seat; 65. U-shaped polyurethane sealing ring; 66. Pressure pad; 67. Second shaft Glyd ring; 7. Vacuum main interface; 8. Nitrogen main interface; 9. Nitrogen distributor; 91. Nitrogen outlet. Detailed Implementation

[0049] 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.

[0050] It should be noted that when a component is referred to as being "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 being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] Please refer to the attached document. Figure 1 and attached Figure 2As shown, one embodiment of this utility model provides a nitrogen-filled stopper device, including an outer cylinder 1, an inner cylinder 2, a stopper shaft 3, a stopper take-off seat 4, a sealing joint 5, a sealing assembly 6, a vacuum main interface 7, a nitrogen main interface 8, and a nitrogen distributor 9; the inner cylinder 2 is coaxial with the outer cylinder 1 and can be slidably arranged relative to it; the stopper shaft 3 is coaxially arranged in the inner cylinder 2; the stopper take-off seat 4 is arranged at the lower end of the stopper shaft 3; the sealing joint 5 is arranged at the lower end of the outer cylinder 1 and can be sealed with the bottle body; the sealing assembly 6 is arranged between the outer cylinder 1 and the inner cylinder 2, so that a sealed connection is formed between the outer cylinder 1 and the inner cylinder 2; the vacuum main interface 7 is arranged on the side wall of the outer cylinder 1 and is located below the sealing assembly 6; the nitrogen main interface 8 is arranged on the side wall of the outer cylinder 1 and is located above the sealing joint 5; the nitrogen distributor 9 is installed in the outer cylinder 1 and has a nitrogen inlet and multiple nitrogen outlets 91, the nitrogen inlet is connected to the nitrogen main interface 8, and the multiple nitrogen outlets 91 are arranged facing the bottle mouth. The inner cylinder 2 is connected to a first lifting device for driving it to move up and down along its own axis.

[0055] In this embodiment, the nitrogen-filling and stoppering device includes an outer cylinder 1, an inner cylinder 2, a stoppering shaft 3, a stopper-removing seat 4, a sealing joint 5, a sealing assembly 6, a vacuum main interface 7, a nitrogen main interface 8, and a nitrogen distribution ring. The inner cylinder 2 is coaxial with the outer cylinder 1 and can slide relative to it. The stoppering shaft 3 is coaxially disposed in the inner cylinder 2. The stopper-removing seat 4 is disposed at the lower end of the stoppering shaft 3. The sealing joint 5 is disposed at the lower end of the outer cylinder 1. The sealing assembly 6 is disposed between the outer cylinder 1 and the inner cylinder 2. The vacuum main interface 7 is disposed on the side wall of the outer cylinder 1 and is located below the sealing assembly 6. The nitrogen main interface 8 is disposed on the side wall of the outer cylinder 1 and is located above the sealing joint 5. The nitrogen distributor 9 is installed inside the outer cylinder 1 and has a nitrogen inlet and multiple nitrogen outlets 91. The nitrogen inlet is connected to the nitrogen main interface 8, and the multiple nitrogen outlets 91 are oriented towards the bottle opening. This structural design allows multiple nitrogen outlets 91 to simultaneously fill the bottle opening with nitrogen, increasing the nitrogen filling speed and efficiently replacing the air inside the bottle. Simultaneously, nitrogen filling and stoppering are completed within the same space, eliminating the need to transfer the bottle between two stations. This effectively prevents external oxygen from re-entering the bottle, improving residual oxygen control. Actual measurements show that the residual oxygen level inside the bottle can be successfully controlled below 0.5%, meeting stricter residual oxygen control requirements, thereby extending the shelf life of the solution and improving its quality stability.

[0056] In some optional embodiments, the nitrogen distributor 9 is a nitrogen distribution ring, and the nitrogen outlet 91 is an oblique hole, which is evenly distributed around the nitrogen distribution ring. The extension line of the center of the oblique hole intersects the central axis of the bottle mouth at the bottle mouth, so that the oblique hole is aligned with the bottle mouth. The nitrogen inlet is located on the nitrogen distribution ring, close to the nitrogen main interface 8, and is connected to the nitrogen main interface 8 through a connecting pipe.

[0057] In some optional embodiments, the nitrogen distribution ring is adapted to the inner wall of the outer cylinder 1, and the outer cylinder 1 has a threaded hole 11. The nitrogen distribution ring is connected to the outer cylinder 1 by bolts passing through the threaded hole 11. In a specific embodiment, the nitrogen distribution ring has a cylindrical ring structure, and the outer wall of the nitrogen distribution ring is adapted to the inner wall of the lower connecting sleeve 133. The inner wall of the nitrogen distribution ring is uniformly provided with oblique holes for nitrogen diversion around its perimeter. The lower connecting sleeve 133 has a threaded hole 11 on the side opposite to the nitrogen main interface 8 for fastening the nitrogen distribution ring, which is used to fix and adjust the height of the nitrogen distribution ring.

[0058] In some optional embodiments, the inner cylinder 2 has an air passage along its axial direction. The inner cylinder 2 includes an inner cylinder body 21, a locking end cap 22, and a pressure plug buffer spring 23. The inner cylinder body 21 is connected to the first lifting device and has a stepped surface inside; the locking end cap 22 is located at the bottom end of the inner cylinder body 21; the pressure plug shaft 3 is coaxially arranged in the inner cylinder body 21 and extends downward through the locking end cap 22; the pressure plug seat 4 is located at the end of the pressure plug shaft 3 away from the inner cylinder body 21; one end of the pressure plug buffer spring 23 is connected to the top end of the pressure plug shaft 3, and the other end is connected to the stepped surface; the axial through hole on the inner cylinder body 21 and the axial through hole on the pressure plug shaft 3 together constitute the air passage. The first lifting device can be a cylinder or other driving device.

[0059] In some optional embodiments, the axial through hole on the inner cylinder body 21 is stepped, comprising a first section and a second section, wherein the diameter of the first section is larger than the diameter of the second section. The pressure plug shaft 3 is slidably mounted on the first section of the axial through hole in the inner cylinder body 21, with the stepped surface located at the junction of the first and second sections. A pressure plug buffer spring 23 is disposed between the top end of the pressure plug shaft 3 and the stepped surface.

[0060] In some optional embodiments, the pressure plug shaft 3 is provided with a first stepped surface facing the plug take-up seat 4, and the locking end cap 22 is provided with a second stepped surface facing the inner cylinder body 21. The second stepped surface cooperates with the first stepped surface to limit the pressure plug shaft 3.

[0061] In some optional embodiments, the outer cylinder 1 includes an outer cylinder body 12 and a connecting sleeve, which are coaxially arranged. The connecting sleeve is disposed at the lower end of the outer cylinder body 12, the sealing joint 5 is disposed at the lower end of the connecting sleeve, and the sealing assembly 6 is disposed between the connecting sleeve and the inner cylinder 2.

[0062] In some optional embodiments, the connecting sleeve includes an upper connecting sleeve 131, an intermediate connecting sleeve 132, and a lower connecting sleeve 133. The upper connecting sleeve 131 is located at the lower end of the outer cylinder body 12 and is bell-shaped with its opening facing downwards. The intermediate connecting sleeve 132 is connected to the lower end of the upper connecting sleeve 131 and includes a first portion located between the upper connecting sleeve 131 and the inner cylinder 2, and a second portion located at the lower end of the upper connecting sleeve 131. It is connected to the inner cylinder 2 via a sealing assembly 6 (specifically, the intermediate connecting sleeve 132 is connected to the inner cylinder body 21 via the sealing assembly 6). The lower connecting sleeve 133 is located at the lower end of the intermediate connecting sleeve 132, a sealing joint 5 is located at the lower end of the lower connecting sleeve 133, and a vacuum port 7 and a nitrogen port 8 are respectively located on the sidewall of the lower connecting sleeve 133. A nitrogen distribution ring is built into the lower connecting sleeve 133.

[0063] In some optional embodiments, a bottle-body sealing spring 134 is provided between the upper connecting sleeve 131 and the middle connecting sleeve 132.

[0064] In some optional embodiments, a limiting sleeve 135 is provided at the lower end of the upper connecting sleeve 131, and the intermediate connecting sleeve 132 passes through the limiting sleeve 135. Specifically, the limiting sleeve 135 is provided with at least two limiting holes at the position corresponding to the lower end of the upper connecting sleeve 131, and the limiting sleeve 135 is connected to the upper connecting sleeve 131 through the limiting holes by a limiting member.

[0065] In some optional embodiments, the sealing assembly 6 includes a pressing end cap 61, a sliding sleeve 62, a first shaft Glyd ring 63, a sealing ring fixing seat 64, a U-shaped polyurethane sealing ring 65, a pressure pad 66, and a second shaft Glyd ring 67. The pressing end cap 61 is disposed at the upper end of the intermediate connecting sleeve 132; the sliding sleeve 62 is disposed between the first part and the inner cylinder 2; the first shaft Glyd ring 63 is disposed between the pressing end cap 61 and the sliding sleeve 62; the sealing ring fixing seat 64 is disposed between the second part and the inner cylinder 2; the U-shaped polyurethane sealing ring 65 is disposed at the upper end of the sealing ring fixing seat 64; the pressure pad 66 is disposed at the upper end of the U-shaped polyurethane sealing ring 65; and the second shaft Glyd ring 67 is disposed at the upper end of the pressure pad 66. In this embodiment, by providing the first shaft Glyd ring 63, the U-shaped polyurethane sealing ring 65, and the second shaft Glyd ring 67, the sealing performance is effectively improved. During use, if any one of them fails, the sealing space can still be maintained, thereby extending the overall service life.

[0066] In some alternative embodiments, the outer cylinder 1 can be designed to be fixed to the main unit without lifting, allowing the bottle to be filled with nitrogen to be lifted; or it can be designed to lift the outer cylinder 1 while the bottle to be filled with nitrogen remains fixed without lifting, that is, the outer cylinder 1 is connected to the second lifting device, which can be a cylinder or other driving device.

[0067] In some optional embodiments, the sealing connector 5 includes a sealing end cap 51 and a bottle body sealing sleeve 52. The sealing end cap 51 is connected to the lower end of the outer cylinder 1, and the bottle body sealing sleeve 52 is disposed inside the sealing end cap 51.

[0068] Furthermore, this utility model also provides a nitrogen-filled stoppering production line, including the nitrogen-filled stoppering device of any of the above embodiments. It should be further noted that the nitrogen-filled stoppering production line includes a bottle inlet station, a bottle outlet station, and a nitrogen-filled stoppering station disposed between the bottle inlet station and the bottle outlet station. Multiple nitrogen-filled stoppering devices are disposed on the nitrogen-filled stoppering station, and these multiple nitrogen-filled stoppering devices can be disposed on a rotary table. Since the nitrogen-filled stoppering production line includes nitrogen-filled stoppering devices, it possesses the technical effects of nitrogen-filled stoppering devices, which will not be elaborated further here.

[0069] Please see the appendix Figure 1 As shown, in some optional embodiments, the nitrogen-filling and sealing device operates as follows: First, the stopper holder 4 lifts the stopper, the outer cylinder 1 descends or the bottle rises, causing the sealing joint 5 to engage with the bottle body and form a sealed fit. Due to the presence of the sealing component 6, a sealed space is formed between the outer cylinder 1 and the bottle body. Next, the sealed space is evacuated through the vacuum port 7 to remove as much air as possible. After evacuation, the vacuum channel is closed, and the nitrogen port 8 is opened. Nitrogen gas is precisely aligned with the bottle opening through multiple evenly distributed oblique holes on the nitrogen distribution ring, directly and effectively filling the bottle. Nitrogen filling continues until the residual oxygen content in the bottle reaches the predetermined requirement. During nitrogen filling, the outer cylinder 1 remains stationary. After nitrogen filling is completed, a final vacuum operation is performed to reduce the gas pressure inside the bottle to ensure the effectiveness of the stopper seal. Subsequently, the inner shaft descends through the first lifting device, pressing the stopper into the bottle opening, completing the nitrogen-filling and sealing process. As can be seen from the above process, this nitrogen-filling and stoppering device creates a small, sealed space at the bottle opening and uses an initial vacuum to remove as much air as possible from this space. Then, nitrogen is filled into the bottle opening through multiple evenly distributed oblique holes on the nitrogen distribution ring. Throughout the nitrogen filling process, nitrogen continuously flows in and maintains a certain pressure to ensure that the residual oxygen level inside the bottle is more strictly controlled. After the nitrogen filling is completed, a second vacuum operation is performed to reduce the pressure, thereby preventing the stopper from popping due to excessive nitrogen pressure. The entire process is carried out in a nitrogen-protected sealed space, preventing oxygen from re-entering the bottle during transportation, effectively reducing the defect rate, lowering production costs, and improving production efficiency.

[0070] Please see the appendix Figure 2As shown, in some other optional embodiments, the nitrogen-filling and stoppering device operates as follows: First, the stopper holder 4 lifts the stopper, the outer cylinder 1 descends or the bottle rises, causing the sealing connector 5 to engage with the bottle body. The position is adjusted to maintain a small gap between the sealing connector 5 and the bottle body. Because the inner cylinder 2 and outer cylinder 1 are sealed together by the sealing assembly 6, nitrogen cannot overflow upwards. Next, the space between the outer cylinder 1 and the bottle body is evacuated through the vacuum port 7, removing the air. After evacuation, the vacuum channel is closed, and the nitrogen port 8 is opened. Nitrogen gas is precisely aligned with the bottle opening through multiple evenly distributed oblique holes on the nitrogen distribution ring, directly and effectively filling the bottle. During the filling process, under the pressure of nitrogen gas, the air inside the bottle is forcibly displaced, and the air can flow out from the small gap between the sealing connector 5 and the bottle body. Nitrogen filling continues until the residual oxygen level in the bottle reaches the predetermined requirement. During the nitrogen filling process, the outer cylinder 1 remains stationary. After nitrogen filling is completed, the inner shaft descends via the first lifting device, pressing the stopper into the bottle mouth, thus completing the nitrogen filling and stoppering process. As can be seen from the above process, this nitrogen filling and stoppering device utilizes multiple evenly distributed oblique holes on the nitrogen distribution ring to fill the bottle mouth with nitrogen, using nitrogen pressure to forcibly displace the air inside the bottle. The entire process is carried out within a nitrogen-protected space, preventing oxygen re-entry during bottle transport, effectively reducing the defect rate, lowering production costs, and improving production efficiency.

[0071] 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-filled plug device, characterized in that, include: outer cylinder; The inner cylinder is coaxial with the outer cylinder and can slide relative to it. The pressure plug shaft is coaxially disposed in the inner cylinder; A stopper holder is located at the lower end of the stopper shaft; A sealing joint is located at the lower end of the outer cylinder; A sealing assembly is disposed between the outer cylinder and the inner cylinder; The main vacuum port is located on the side wall of the outer cylinder and below the sealing assembly; The nitrogen main inlet is located on the side wall of the outer cylinder and above the sealing joint; A nitrogen distributor is installed inside the outer cylinder and has a nitrogen inlet and multiple nitrogen outlets. The nitrogen inlet is connected to the main nitrogen interface, and the multiple nitrogen outlets are arranged facing the bottle opening.

2. The nitrogen-filled plug device according to claim 1, characterized in that, The nitrogen distributor is a nitrogen distribution ring, and the nitrogen outlet is an oblique hole, which is evenly arranged around the nitrogen distribution ring. The extension line of the center of the oblique hole intersects the central axis of the bottle mouth at the bottle mouth.

3. The nitrogen-filled plug device according to claim 2, characterized in that, The nitrogen distribution ring is adapted to the inner wall of the outer cylinder. The outer cylinder has a threaded hole, and the nitrogen distribution ring is connected to the outer cylinder by a bolt passing through the threaded hole.

4. The nitrogen-filled plug device according to claim 1, characterized in that, The inner cylinder includes: The inner cylinder body is connected to the first lifting device and has a stepped surface inside; A locking end cap is provided at the bottom end of the inner cylinder body. The plug shaft is coaxially provided in the inner cylinder body and extends downward through the locking end cap. The plug-taking seat is provided at the end of the plug shaft away from the inner cylinder body. The pressure spring is connected at one end to the top of the pressure spring shaft and at the other end to the stepped surface.

5. The nitrogen-filled plug device according to claim 1, characterized in that, The outer cylinder includes: outer cylinder body; A connecting sleeve is disposed at the lower end of the outer cylinder body, a sealing joint is disposed at the lower end of the connecting sleeve, and a sealing assembly is disposed between the connecting sleeve and the inner cylinder.

6. The nitrogen-filled plug device according to claim 5, characterized in that, The connecting sleeve includes: An upper connecting sleeve is disposed at the lower end of the outer cylinder body; An intermediate connecting sleeve, connected to the lower end of the upper connecting sleeve, includes a first part located between the upper connecting sleeve and the inner cylinder and a second part located at the lower end of the upper connecting sleeve, and is connected to the inner cylinder through the sealing assembly; The lower connecting sleeve is located at the lower end of the intermediate connecting sleeve, the sealing joint is located at the lower end of the lower connecting sleeve, and the nitrogen main interface is located on the side wall of the lower connecting sleeve.

7. The nitrogen-filled plug device according to claim 6, characterized in that, A bottle-body sealing spring is provided between the upper connecting sleeve and the middle connecting sleeve; And / or, the lower end of the upper connecting sleeve is provided with a limiting sleeve, and the middle connecting sleeve passes through the limiting sleeve.

8. The nitrogen-filled plug device according to claim 6, characterized in that, The sealing assembly includes: The end cap is clamped and positioned at the upper end of the intermediate connecting sleeve. A sliding sleeve is disposed between the first part and the inner cylinder; The first shaft uses a Glad ring, which is disposed between the clamping end cap and the sliding sleeve; A sealing ring fixing seat is disposed between the second part and the inner cylinder; A U-shaped polyurethane sealing ring is disposed on the upper end of the sealing ring fixing seat; A pressure pad is disposed at the upper end of the U-shaped polyurethane sealing ring; The second axis uses a Gladius ring, which is positioned at the upper end of the pressure pad.

9. The nitrogen-filled plug device according to claim 1, characterized in that, The outer cylinder is connected to the second lifting device; And / or, the sealing joint includes a sealing end cap and a bottle body sealing sleeve, the sealing end cap being connected to the lower end of the outer cylinder, and the bottle body sealing sleeve being disposed inside the sealing end cap.

10. A nitrogen-filled plug production line, characterized in that, Includes the nitrogen-filled plug device according to any one of claims 1 to 9.

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