Medical narrow-mouth bottle liquid medicine filling system

Abstract

The utility model provides a kind of medical narrow mouth bottle liquid medicine filling system, belong to medical narrow mouth bottle liquid filling technical field, including conveying mechanism, filling mechanism, plug mechanism and nitrogen filling mechanism;The conveying mechanism includes the first conveying belt, filling conveying disc, nitrogen filling conveying disc, plug conveying disc and second conveying belt that sequentially convey narrow mouth bottle;The filling mechanism is set on the filling conveying disc, with the filling conveying disc synchronous rotation, and liquid medicine is filled in narrow mouth bottle;The plug mechanism is set on the plug conveying disc, for plugging stopcock to narrow mouth bottle;The nitrogen filling mechanism includes direct current nitrogen charger, umbrella-shaped nitrogen charger and horizontal current nitrogen charger, the cavity in bottle is slowly secondary filled with nitrogen by the umbrella-shaped nitrogen charger, and it is presented umbrella-shaped to blow nitrogen, substantially reduce the residual air in the corner part of bottle body, and then the horizontal current nitrogen charger is filled with nitrogen three times to bottle mouth position, blow bottle mouth position, reduce the air content of bottle mouth position.

Description

Technical Field

[0001] This utility model belongs to the field of medical narrow-mouth bottle filling technology, and specifically relates to a medical narrow-mouth bottle liquid filling system. Background Technology

[0002] In the pharmaceutical manufacturing industry, medical narrow-mouth bottles, such as antibiotic vials and vaccine vials, serve as crucial containers for the storage and transportation of pharmaceutical solutions. The filling process of these bottles has a decisive impact on the cleanliness, stability, and safety of the medications. In some narrow-mouth bottles, after filling, a portion of the bottle remains empty. Traditional filling systems typically employ open or semi-closed structures. Because of this empty cavity, if the air inside the bottle is not effectively expelled after filling, residual oxygen may trigger an oxidation reaction in the medication, accelerating the degradation of active ingredients and increasing the risk of microbial growth.

[0003] Existing technologies often achieve inert gas protection through intermittent nitrogen purging or one-way exhaust valves. For example, patent number CN202223605667.3 describes a filling and nitrogen-purging device, comprising a filling mechanism, a stoppering mechanism, and a nitrogen-purging mechanism. The nitrogen-purging mechanism includes a nitrogen source and a first nitrogen-purging pipe and a second nitrogen-purging pipe connected to the nitrogen source. The first nitrogen-purging pipe is used to fill the reagent bottle to be filled with nitrogen and is equipped with a first flow valve. The second nitrogen-purging pipe is positioned between the filling mechanism and the stoppering mechanism and is used to fill the reagent bottle after filling but before stoppering with nitrogen. The second nitrogen-purging pipe is equipped with a second flow valve. The filling and nitrogen-purging device provided in this application, compared to existing technologies, can quantitatively fill reagent bottles with nitrogen, effectively reducing nitrogen consumption while ensuring a consistent headspace residual oxygen level for each bottle after nitrogen purging, thus improving product quality uniformity.

[0004] However, if the gas flow rate is too high, turbulence can easily occur, potentially causing the liquid to splash or foam; if the flow rate is too low, sufficient air replacement cannot be achieved, easily forming "air pockets" or dead zones, leading to fluctuations and exceeding of the standard residual oxygen level in the bottle top space. Therefore, due to the narrow opening of the narrow-mouthed bottle, it is difficult to expel air from the inside of the bottle, making it difficult to control the air level inside the bottle to drop below the standard level. Utility Model Content

[0005] Based on this, the present invention provides a medical narrow-mouth bottle liquid filling system to solve the technical problem in the prior art that, due to the narrow mouth of the narrow-mouth bottle, it is difficult to expel air from the bottle body and to control the air in the bottle body to drop below the standard level.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0007] A medical narrow-mouth bottle liquid filling system includes a conveying mechanism, a filling mechanism, a stoppering mechanism, and a nitrogen filling mechanism;

[0008] The conveying mechanism includes a first conveyor belt that sequentially conveys narrow-mouth bottles, a filling conveyor tray, a nitrogen filling conveyor tray, a stopper conveyor tray, and a second conveyor belt;

[0009] The filling mechanism is mounted on the filling conveyor tray, rotates synchronously with the filling conveyor tray, and fills the narrow-mouth bottle with liquid medicine;

[0010] The stoppering mechanism is mounted on the stoppering conveyor plate and is used to seal the stopper onto the narrow-mouth bottle;

[0011] The nitrogen filling mechanism includes a DC nitrogen filler, an umbrella-shaped nitrogen filler, and a horizontal flow nitrogen filler. The DC nitrogen filler is located at the end of the first conveyor belt and is used to vertically fill the narrow-mouth bottle with nitrogen. The umbrella-shaped nitrogen filler is located on the nitrogen filling conveyor plate and is used to slowly and diffuse nitrogen into the surrounding area of ​​the narrow-mouth bottle. The horizontal flow nitrogen filler is located on one side of the stopper mechanism and is used to horizontally fill the mouth of the narrow-mouth bottle with nitrogen.

[0012] Preferably, the DC nitrogen filler includes a first nitrogen supply tank, a first lifting frame, a first control valve, and a DC nitrogen filling nozzle. The first nitrogen supply tank is used to supply nitrogen. The first lifting frame is located on one side of the tail end of the first conveyor belt and moves up and down vertically. The first control valve is connected to the first nitrogen supply tank through a nitrogen pipe and is used to control the flow and flow rate of nitrogen. The DC nitrogen filling nozzle is vertically located at the bottom of the first control valve.

[0013] Preferably, the inner diameter of the flow cavity inside the DC nitrogen-filling nozzle gradually decreases along the vertical direction.

[0014] Preferably, the umbrella-shaped nitrogen filler includes a second nitrogen supply tank, a second lifting frame, a second control valve, and an umbrella-shaped nitrogen filling nozzle. The second nitrogen supply tank is used to supply nitrogen. The second lifting frame is mounted on the nitrogen filling conveyor plate and moves up and down vertically. The second control valve is connected to the second nitrogen supply tank through a nitrogen pipe and is used to control the flow of nitrogen and adjust its flow rate. The umbrella-shaped nitrogen filling nozzle is vertically mounted at the bottom of the second control valve.

[0015] Preferably, the umbrella-shaped nitrogen-filling nozzle includes a conical expanding cylinder and a diverting top cone. The inner diameter of the conical expanding cylinder gradually increases, and the diverting top cone is fixedly installed at the end of the conical expanding cylinder by a connecting rod. An umbrella-shaped flow cavity is reserved between the diverting top cone and the conical expanding cylinder.

[0016] Preferably, several sets of the umbrella-shaped nitrogen fillers are evenly arranged on the nitrogen filling conveyor plate.

[0017] Preferably, the horizontal flow nitrogen filler includes a third nitrogen supply tank, a third lifting frame, a third control valve, and a horizontal nitrogen filling nozzle. The third nitrogen supply tank is used to supply nitrogen. The third lifting frame is located on one side of the stopper mechanism and moves up and down vertically. The third control valve is connected to the third nitrogen supply tank through a nitrogen pipe and is used to control the flow of nitrogen and adjust the flow rate. The horizontal nitrogen filling nozzle is vertically located at the bottom of the third control valve, and nitrogen is horizontally sprayed from the horizontal nitrogen filling nozzle to the vicinity of the narrow-mouth bottle.

[0018] Preferably, the transverse nitrogen filling nozzle is one of a square nitrogen filling nozzle or a flared nitrogen filling nozzle.

[0019] Preferably, the system also includes a testing platform located at the tail end of the second conveyor belt. The testing platform is used to collect the filled narrow-mouth bottles and perform quality testing.

[0020] Compared with the prior art, the present invention has at least the following advantages:

[0021] The DC nitrogen filler purifies the narrow-mouthed bottle with nitrogen in the first pass, quickly purging the air inside and preventing air from mixing into the liquid. After the liquid is filled, during the transport of the narrow-mouthed bottle, air will continue to enter the unfilled cavity. The umbrella-shaped nitrogen filler slowly fills the cavity with nitrogen a second time, blowing nitrogen in an umbrella shape to significantly reduce residual air in the dead corners of the bottle. Then, the horizontal flow nitrogen filler purifies the bottle opening a third time, reducing the air content at the bottle opening. Through these three nitrogen fills, even if the narrow-mouthed bottle has a narrow opening, the air inside can be significantly expelled, reducing the residual oxygen content in the bottle to below 6%. Attached Figure Description

[0022] Figure 1 Axonometric drawing of a medical narrow-mouth bottle liquid filling system.

[0023] Figure 2 Top view of a medical narrow-mouth bottle liquid filling system.

[0024] Figure 3 This is an isometric view of a DC nitrogen charger.

[0025] Figure 4 This is an isometric view of an umbrella-shaped nitrogen filler.

[0026] Figure 5 for Figure 4 -A magnified view of a portion of the image.

[0027] Figure 6Isometric view of a horizontal flow nitrogen filler.

[0028] In the diagram: conveying mechanism 100, first conveyor belt 110, filling conveyor tray 120, nitrogen filling conveyor tray 130, stopper conveyor tray 140, second conveyor belt 150, filling mechanism 200, stopper mechanism 300, nitrogen filling mechanism 400, DC nitrogen filler 410, first nitrogen supply tank 411, first lifting frame 412, first control valve 413, DC nitrogen filling nozzle 414, umbrella-shaped nitrogen filler 420, second nitrogen supply tank 421, second lifting frame 422, second control valve 423, umbrella-shaped nitrogen filling nozzle 424, conical expansion cylinder 4241, diverting top cone 4242, horizontal flow nitrogen filler 430, third nitrogen supply tank 431, third lifting frame 432, third control valve 433, transverse nitrogen filling nozzle 434, detection platform 500. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other. The technical solution of the present invention will be further described below with reference to the accompanying drawings of the embodiments. The present invention is not limited to the specific embodiments described below.

[0030] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "front," "rear," "left," "right," "top," and "bottom" 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 component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0031] Please refer to Figures 1 to 6 A medical narrow-mouth bottle liquid filling system includes a conveying mechanism 100, a filling mechanism 200, a stoppering mechanism 300, and a nitrogen filling mechanism 400;

[0032] The conveying mechanism 100 is a commonly used conveying device in existing bottled medicine filling systems. The conveying mechanism 100 includes a first conveyor belt 110 for sequentially conveying narrow-mouth bottles, a filling conveyor tray 120, a nitrogen-filling conveyor tray 130, a stoppering conveyor tray 140, and a second conveyor belt 150. Specifically, the first conveyor belt 110 is a belt conveyor. The filling conveyor tray 120 has several slots and conveying tracks. A servo motor drives the filling conveyor tray 120 to rotate, and the slots move the narrow-mouth bottles within the conveying tracks. The nitrogen-filling conveyor tray 130 has the same or similar structure to the filling conveyor tray 120, and the conveying track of the nitrogen-filling conveyor tray 130 is parallel to that of the filling conveyor tray 120. The conveying tracks are interconnected, and the narrow-mouth bottles on the clamps of the filling conveying tray 120 can be conveyed to the clamps of the nitrogen-filling conveying tray 130 via the conveying tracks; the stoppering conveying tray 140 has the same or similar structure as the nitrogen-filling conveying tray 130, and the conveying track of the stoppering conveying tray 140 is interconnected with the conveying track of the nitrogen-filling conveying tray 130, and the narrow-mouth bottles on the clamps of the nitrogen-filling conveying tray 130 can be conveyed to the clamps of the stoppering conveying tray 140 via the conveying tracks; the second conveyor belt 150 is a belt conveyor, and the narrow-mouth bottles conveyed on the stoppering conveying tray 140 are finally conveyed to the second conveyor belt 150, and the subsequent conveying is completed by the second conveyor belt 150.

[0033] The filling mechanism 200 is mounted on the filling conveyor plate 120 and rotates synchronously with the filling conveyor plate 120 to fill the narrow-mouth bottle with liquid medicine. The filling mechanism 200 is an existing liquid medicine filling machine. As the filling conveyor plate 120 rotates, it can fill a fixed volume of liquid medicine into the narrow-mouth bottle at regular intervals.

[0034] The stoppering mechanism 300 is mounted on the stoppering conveyor plate 140 and is used to seal the stopper onto the narrow-mouth bottle. The stoppering mechanism 300 is an existing narrow-mouth bottle stoppering machine. When the narrow-mouth bottle is transported to the stoppering head of the stoppering machine, the stoppering mechanism 300 moves vertically downward to press the stopper onto the mouth of the narrow-mouth bottle, thereby sealing the narrow-mouth bottle.

[0035] See Figures 3 to 6 The nitrogen filling mechanism 400 includes a DC nitrogen filler 410, an umbrella-shaped nitrogen filler 420, and a horizontal flow nitrogen filler 430. The DC nitrogen filler 410 is disposed at the tail end of the first conveyor belt 110 and is used to vertically fill the narrow-mouth bottle with nitrogen. The umbrella-shaped nitrogen filler 420 is disposed on the nitrogen filling conveyor plate 130 and is used to slowly and diffuse nitrogen into the narrow-mouth bottle. The horizontal flow nitrogen filler 430 is disposed on one side of the stopper mechanism 300 and is used to horizontally fill the narrow-mouth bottle with nitrogen.

[0036] Specific work process

[0037] The medical narrow-mouth bottle liquid filling system operates in a relatively enclosed space. First, the narrow-mouth bottle is conveyed from the previous process to the first conveyor belt 110. After being conveyed to the end of the first conveyor belt 110, the narrow-mouth bottle stops moving and is positioned directly below the DC nitrogen filler 410. The nitrogen filling end of the DC nitrogen filler 410 extends into the narrow-mouth bottle, and the DC nitrogen filler 410 directly sprays nitrogen gas into the narrow-mouth bottle at a flow rate of 10 L / min. Nitrogen gas rushes directly to the bottom of the narrow-mouth bottle, forcing out the air inside and achieving a single emptying of the bottle. The emptied bottle then enters the filling conveyor tray 120, where the filling mechanism 200 fills it with the medicine. After filling, the bottle is conveyed to the nitrogen filling conveyor tray 130. The umbrella-shaped nitrogen filler 420 extends into the upper cavity of the narrow-mouth bottle, and nitrogen gas ejected from the filler 420 slowly enters the bottle. The flow rate is 5L / min, and the nitrogen gas sprayed by the umbrella-shaped nitrogen filler 420 flows in an umbrella-shaped distribution to the inner walls of both sides of the narrow-mouth bottle. The nitrogen gas flows from all sides of the bottle towards the center, which can significantly reduce the residual air in the dead corners of the bottle and realize the secondary purging of the liquid bottle. The narrow-mouth bottle that has been purged twice enters the stopper conveying plate 140. During the process of entering the stopper conveying plate 140, the horizontal flow nitrogen filler 430 blows nitrogen gas laterally to the height of the bottle mouth. The horizontal flow nitrogen filler 430 is close to the narrow-mouth bottle, and the nitrogen flow rate is 5L / min, which is sufficient to ensure that the nitrogen gas blown by the horizontal flow nitrogen filler 430 can cover the bottle mouth area, so that the bottle mouth is always full of nitrogen gas and reduce the air content. When the narrow-mouth bottle is delivered to the stopper head of the stopper mechanism 300, during the stoppering process, the horizontal flow nitrogen filler 430 continues to blow nitrogen gas to the bottle mouth until the narrow-mouth bottle is sealed, realizing the tertiary nitrogen filling of the bottle mouth. The DC nitrogen filler 410 first fills the narrow-mouth bottle with nitrogen, quickly purging the air inside and preventing air from mixing into the liquid. After the liquid is filled, during the transport of the narrow-mouth bottle, air will continue to enter the cavity of the bottle that has not been filled with liquid. The umbrella-shaped nitrogen filler 420 slowly fills the cavity of the bottle with nitrogen a second time, and blows the nitrogen in an umbrella shape, which greatly reduces the residual air in the dead corners of the bottle. Then, the horizontal flow nitrogen filler 430 fills the bottle mouth with nitrogen a third time, blowing the bottle mouth to reduce the air content at the bottle mouth. Through three nitrogen fillings, even if the narrow-mouth bottle has a narrow mouth, the air inside the bottle can be greatly expelled, reducing the residual oxygen content in the bottle to below 6%.

[0038] In a preferred embodiment, the DC nitrogen filler 410 includes a first nitrogen supply tank 411, a first lifting frame 412, a first control valve 413, and a DC nitrogen filling nozzle 414. The first nitrogen supply tank 411 is used to supply nitrogen and is an existing nitrogen supply tank. The first lifting frame 412 is located on one side of the tail end of the first conveyor belt 110 and moves up and down vertically. The first control valve 413 is connected to the first nitrogen supply tank 411 through a nitrogen pipe and is used to control the flow of nitrogen and adjust the flow rate. The DC nitrogen filling nozzle 414 is vertically located at the bottom of the first control valve 413. When the narrow-mouth bottle is directly below the DC nitrogen filling nozzle 414, the first control valve 413 detects that the narrow-mouth bottle is directly below, the first lifting frame 412 descends, the DC nitrogen filling nozzle 414 extends to the bottle mouth, the first control valve 413 opens, and the nitrogen in the first nitrogen supply tank 411 is sprayed out through the DC nitrogen filling nozzle 414. The nitrogen purges the narrow-mouth bottle for 3-5 seconds, the first control valve 413 closes, the first lifting frame 412 rises, the nitrogen filling ends, and it waits to fill the next bottle with nitrogen.

[0039] Specifically, the first lifting frame 412 includes a pushing member and a fixed frame. The fixed frame is fixedly mounted by bolts, and the pushing rod is mounted on the fixed frame. The first control valve 413 and the DC nitrogen-filling nozzle 414 are connected to the pushing rod, which drives the first control valve 413 and the DC nitrogen-filling nozzle 414 to move up and down. The pushing member is either an electric push rod or a pushing cylinder.

[0040] Specifically, the first control valve 413 is a commonly used integrated control device. Through a pressure sensor, photosensitive sensor, or infrared sensor, the first control valve 413 can detect whether the narrow-necked bottle is directly below the DC nitrogen-filling nozzle 414. The first control valve 413 controls the electric actuator to descend or rise a preset length, such as 5 cm, until the DC nitrogen-filling nozzle 414 extends into the narrow-necked bottle. Once the DC nitrogen-filling nozzle 414 is inserted into the narrow-necked bottle, the valve inside the first control valve 413 opens, and nitrogen gas is ejected. Furthermore, the flow rate of the nitrogen gas can be controlled through the first control valve 413.

[0041] Specifically, the internal flow cavity of the DC nitrogen-filling nozzle 414 gradually decreases in diameter along the vertical direction, which has the function of concentrating the flow. Nitrogen gas rapidly impacts the bottom of the bottle and expels the air inside the bottle.

[0042] In a preferred embodiment, the umbrella-shaped nitrogen filler 420 includes a second nitrogen supply tank 421, a second lifting frame 422, a second control valve 423, and an umbrella-shaped nitrogen filling nozzle 424. The second nitrogen supply tank 421 supplies nitrogen. The second lifting frame 422 is mounted on the nitrogen filling conveyor plate 130 and moves vertically up and down. The second control valve 423 is connected to the second nitrogen supply tank 421 via a nitrogen pipe and controls the flow and flow rate of nitrogen. The umbrella-shaped nitrogen filling nozzle 424 is vertically positioned at the bottom of the second control valve 423. The working principle of the umbrella-shaped nitrogen filler 420 is the same as that of the DC nitrogen filler 410.

[0043] Specifically, the structure of the second lifting frame 422 is the same as that of the first lifting frame 412.

[0044] Specifically, the structure of the second control valve 423 is the same as that of the first control valve 413. The second control valve 423 controls nitrogen gas to flow out of the umbrella-shaped nitrogen-filling nozzle 424 at a low flow rate. Generally, the flow rate of nitrogen gas sprayed from the umbrella-shaped nitrogen-filling nozzle 424 is less than 5 L / min.

[0045] Specifically, the umbrella-shaped nitrogen-filling nozzle 424 includes a conical expanding cylinder 4241 and a diverting top cone 4242. The inner diameter of the conical expanding cylinder 4241 gradually increases, and the diverting top cone 4242 is fixedly installed at the end of the conical expanding cylinder 4241 by a connecting rod. An umbrella-shaped flow cavity is reserved between the diverting top cone 4242 and the conical expanding cylinder 4241. The nitrogen gas flowing out from the conical expanding cylinder 4241 flows out along the umbrella-shaped flow cavity, disperses, and falls from both sides of the inner wall of the bottle, expelling the air remaining in the dead corners of the bottle and reducing the amount of residual air in the bottle.

[0046] Specifically, several sets of umbrella-shaped nitrogen fillers 420 are evenly arranged on the nitrogen filling conveyor plate 130. Each narrow-necked bottle on the nitrogen filling conveyor plate 130 has an umbrella-shaped nitrogen filler 420 above it, which continuously fills the narrow-necked bottle with nitrogen as the bottle rotates, reducing the amount of residual air in the bottle.

[0047] In a preferred embodiment, the horizontal flow nitrogen filler 430 includes a third nitrogen supply tank 431, a third lifting frame 432, a third control valve 433, and a horizontal nitrogen filling nozzle 434. The third nitrogen supply tank 431 supplies nitrogen. The third lifting frame 432 is located on one side of the stopper mechanism 300 and moves vertically up and down. The third control valve 433 is connected to the third nitrogen supply tank 431 via a nitrogen pipe and controls the flow and flow rate of nitrogen. The horizontal nitrogen filling nozzle 434 is vertically located at the bottom of the third control valve 433, and nitrogen is horizontally sprayed from the nozzle to the vicinity of the narrow-mouth bottle. The working principle of the horizontal flow nitrogen filler 430 is the same as that of the DC nitrogen filler 410.

[0048] Specifically, the structure of the third lifting frame 432 is the same as that of the first lifting frame 412. The telescopic length is adjusted to match the height of the narrow-mouth bottle, allowing the nitrogen gas blown out by the transverse nitrogen nozzle 434 to reach the mouth of the narrow-mouth bottle.

[0049] Specifically, the structure of the third control valve 433 is the same as that of the first control valve 413.

[0050] Specifically, the transverse nitrogen filling nozzle 434 is either a square nitrogen filling nozzle or a flared nitrogen filling nozzle. The square nitrogen filling nozzle is suitable for purging directly in front of the bottle stopper position, while the flared nitrogen filling nozzle has a wide nitrogen output range and is suitable for positioning between the nitrogen filling conveyor plate 130 and the stopper conveyor plate 140.

[0051] In a preferred embodiment, a detection platform 500 is further included. The detection platform 500 is located at the tail end of the second conveyor belt 150. The detection platform 500 is used to collect the filled narrow-mouth bottles and perform quality inspection. After a batch of narrow-mouth bottles is filled, they are gathered at the detection platform 500, and a sampling inspection method is adopted to randomly select narrow-mouth bottles for quality inspection, sealing inspection, and air density inspection. The quality inspection, sealing inspection, and air density inspection of the narrow-mouth bottles are carried out using corresponding professional equipment. The specific inspection equipment is existing technology and will not be described in detail here.

[0052] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A medical narrow-mouth bottle liquid filling system, characterized in that, Includes a conveying mechanism, a filling mechanism, a stoppering mechanism, and a nitrogen filling mechanism; The conveying mechanism includes a first conveyor belt that sequentially conveys narrow-mouth bottles, a filling conveyor tray, a nitrogen filling conveyor tray, a stopper conveyor tray, and a second conveyor belt; The filling mechanism is mounted on the filling conveyor tray, rotates synchronously with the filling conveyor tray, and fills the narrow-mouth bottle with liquid medicine; The stoppering mechanism is mounted on the stoppering conveyor plate and is used to seal the stopper onto the narrow-mouth bottle; The nitrogen filling mechanism includes a DC nitrogen filler, an umbrella-shaped nitrogen filler, and a horizontal flow nitrogen filler. The DC nitrogen filler is located at the end of the first conveyor belt and is used to vertically fill the narrow-mouth bottle with nitrogen. The umbrella-shaped nitrogen filler is located on the nitrogen filling conveyor plate and is used to slowly and diffuse nitrogen into the surrounding area of ​​the narrow-mouth bottle. The horizontal flow nitrogen filler is located on one side of the stopper mechanism and is used to horizontally fill the mouth of the narrow-mouth bottle with nitrogen.

2. The medical narrow-mouth bottle liquid filling system as described in claim 1, characterized in that, The DC nitrogen purifier includes a first nitrogen supply tank, a first lifting frame, a first control valve, and a DC nitrogen purging nozzle. The first nitrogen supply tank is used to supply nitrogen. The first lifting frame is located on one side of the tail end of the first conveyor belt and moves up and down vertically. The first control valve is connected to the first nitrogen supply tank through a nitrogen pipe and is used to control the flow of nitrogen and adjust the flow rate. The DC nitrogen purging nozzle is vertically located at the bottom of the first control valve.

3. The medical narrow-mouth bottle liquid filling system as described in claim 2, characterized in that, The inner diameter of the flow cavity inside the DC nitrogen-filled nozzle gradually decreases along the vertical direction.

4. The medical narrow-mouth bottle liquid filling system as described in claim 1, characterized in that, The umbrella-shaped nitrogen filler includes a second nitrogen supply tank, a second lifting frame, a second control valve, and an umbrella-shaped nitrogen filling nozzle. The second nitrogen supply tank is used to supply nitrogen. The second lifting frame is mounted on the nitrogen filling conveyor plate and moves up and down vertically. The second control valve is connected to the second nitrogen supply tank through a nitrogen pipe and is used to control the flow and flow rate of nitrogen. The umbrella-shaped nitrogen filling nozzle is vertically mounted at the bottom of the second control valve.

5. The medical narrow-mouth bottle liquid filling system as described in claim 4, characterized in that, The umbrella-shaped nitrogen-filling nozzle includes a conical expanding cylinder and a diverting top cone. The inner diameter of the conical expanding cylinder gradually increases, and the diverting top cone is fixedly installed at the end of the conical expanding cylinder by a connecting rod. An umbrella-shaped flow cavity is reserved between the diverting top cone and the conical expanding cylinder.

6. The medical narrow-mouth bottle liquid filling system as described in claim 4 or 5, characterized in that, Several sets of umbrella-shaped nitrogen fillers are evenly arranged on the nitrogen filling conveyor plate.

7. The medical narrow-mouth bottle liquid filling system as described in claim 1, characterized in that, The horizontal flow nitrogen filler includes a third nitrogen supply tank, a third lifting frame, a third control valve, and a horizontal nitrogen filling nozzle. The third nitrogen supply tank is used to supply nitrogen. The third lifting frame is located on one side of the stopper mechanism and moves up and down vertically. The third control valve is connected to the third nitrogen supply tank through a nitrogen pipe and is used to control the flow of nitrogen and adjust the flow rate. The horizontal nitrogen filling nozzle is vertically located at the bottom of the third control valve, and nitrogen is horizontally sprayed from the horizontal nitrogen filling nozzle to the vicinity of the narrow-mouth bottle.

8. The medical narrow-mouth bottle liquid filling system as described in claim 7, characterized in that, The transverse nitrogen-filling nozzle is either a square nitrogen-filling nozzle or a flared nitrogen-filling nozzle.

9. The medical narrow-mouth bottle liquid filling system as described in claim 1, characterized in that, It also includes a testing platform located at the tail end of the second conveyor belt. The testing platform is used to collect the filled narrow-mouth bottles and perform quality testing.

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