Vial dosing filler jet

Abstract

This utility model discloses a quantitative filling nozzle for medicine bottles, used for filling liquid materials into containers, comprising: a cap having an isolated injection channel and an exhaust channel; an injection tube having an inlet end for connecting to a liquid material supply device and an outlet end extending through the injection channel to below the cap; the extension portion of the injection tube includes a first branch pipe and a second branch pipe arranged in parallel; wherein the first branch pipe serves as the main passage for filling the container with liquid; and a float valve mechanism including a float core slidably disposed within the second branch pipe; wherein, when the liquid level in the container rises to a set height, the float core floats to a predetermined position under buoyancy, and its top end forms a seal blocking the outlet of the first branch pipe. This nozzle has a more compact structure, more reliable operation, and is easier to clean and maintain.

Description

Technical Field

[0001] This utility model relates to the field of liquid material filling technology, and in particular to a quantitative filling nozzle for medicine bottles. Background Technology

[0002] In the field of liquid material filling technology, especially in industries such as pharmaceuticals, food, and fine chemicals, quantitative filling of liquids into bottles, cans, and other containers is a common and crucial process. This process not only requires high efficiency and hygiene, but also typically demands a high degree of accuracy and consistency in the filling volume.

[0003] Traditional filling methods, such as those relying on time control, flow meter measurement, or weight sensing, can achieve a certain level of accuracy, but their system structure is often relatively complex, or they have certain requirements regarding equipment cost and maintenance.

[0004] Therefore, it is necessary to provide a more compact, reliable, and easy-to-clean filling nozzle. Utility Model Content

[0005] In view of the above situation and to overcome the defects of the prior art, this utility model provides a quantitative filling nozzle for medicine bottles. The nozzle has a more compact structure, more reliable operation, and is easier to clean and maintain.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides a quantitative filling nozzle for medicine bottles, used for filling liquid materials into containers, including:

[0008] The cap has mutually isolated injection and venting channels;

[0009] The injection pipe has an inlet end for connecting to a liquid material supply device, and an outlet end that passes through the injection channel and extends to below the pressure cap; the extension portion of the injection pipe includes a first branch pipe and a second branch pipe arranged in parallel.

[0010] The first branch pipe serves as the main passage for filling the container with liquid.

[0011] A float valve mechanism, comprising a float slidably disposed within the second branch pipe;

[0012] When the liquid level in the container rises to a set height, the float core floats to a predetermined position under the action of buoyancy, and its top end forms a seal blockage against the liquid outlet of the first branch pipe.

[0013] Furthermore, the cross-sections of the inner cavities of the first and second branch pipes are rectangular;

[0014] The float core is a wedge-shaped column with a truncated top.

[0015] Furthermore, the sliding gap between the float core and the inner wall of the second branch pipe is no greater than 0.2 mm.

[0016] Furthermore, the end of the second branch pipe is formed with a constriction structure for axially limiting the float core.

[0017] Furthermore, it further includes: a manual control valve, which is disposed on the line of the injection pipe.

[0018] Furthermore, it further includes:

[0019] An exhaust pipe that extends through the exhaust passage.

[0020] Furthermore, the exhaust pipe is equipped with a one-way valve that only allows gas to be discharged from inside the container.

[0021] Furthermore, the portion of the exhaust pipe extending to the underside of the cap is configured as an upward-opening U-shaped bend.

[0022] Furthermore, it further includes:

[0023] A sealing element is provided on the end face of the cap facing the container opening.

[0024] This utility model has at least the following advantages or beneficial effects:

[0025] This invention employs a cap structure with mutually isolated injection and venting channels. This structure helps separate the filling and venting processes, reducing mutual interference. It also utilizes a first branch pipe and a second branch pipe arranged in parallel. The first branch pipe serves as the main filling passage, while the second branch pipe contains a float valve mechanism. This float rises according to the liquid level and directly blocks the outlet of the first branch pipe, achieving automatic liquid level sensing and mechanical cutoff of the flow path. Overall, this invention achieves automatic control of the filling liquid level with a relatively simple mechanical structure, contributing to improved filling consistency and reliability.

[0026] This invention employs a one-way valve on the exhaust pipe, which allows only the gas inside the container to escape. Overall, this invention effectively prevents external air or filling liquid from flowing back into the container through the exhaust pipe, helping to maintain the cleanliness of the filling environment. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A schematic diagram of a quantitative filling nozzle for medicine bottles;

[0029] Figure 2 for Figure 1 Front view of a quantitative filling nozzle for traditional Chinese medicine bottles;

[0030] Figure 3 A schematic diagram showing the use of a quantitative filling nozzle and container for medicine bottles.

[0031] Figure label:

[0032] 1-Capping; 11-Injection channel; 12-Ventilation channel;

[0033] 2-Injection tube; 21-First branch tube; 22-Second branch tube; 23-Float core; 24-Narrowing structure;

[0034] 3-Manual control valve;

[0035] 4-Exhaust pipe; 41-One-way valve;

[0036] 5-Seals. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0038] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0039] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0040] In this utility model, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of the structural relationship between the various parts or elements of this utility model and do not specifically refer to any part or element in this utility model. They should not be construed as limitations on this utility model.

[0041] In this utility model, terms such as "fixed", "connected", and "linked" should be interpreted broadly, indicating that it can be a fixed connection, an integral connection, or a detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. For relevant scientific researchers or technicians in this field, the specific meaning of the above terms in this utility model can be determined according to the specific circumstances, and should not be construed as a limitation of this utility model.

[0042] The embodiments of this utility model will be described in detail below.

[0043] This utility model discloses a quantitative filling nozzle for medicine bottles. By setting a cap 1 with mutually isolated injection channels 11 and exhaust channels 12, this utility model provides independent paths for liquid filling and gas discharge, helping to reduce gas-liquid interference. The injection pipe 2 has a first branch pipe 21 and a second branch pipe 22 connected in parallel at its end. The first branch pipe 21 serves as the main filling passage, while the second branch pipe 22 contains a sliding float core 23, forming the core of the float valve mechanism. This structure allows the float core 23 to directly sense changes in the liquid level within its branch pipe and float upwards under buoyancy, directly sealing and blocking the outlet of the first branch pipe 21 with its top. This mechanical linkage design achieves automatic shut-off based on liquid level height without external power or complex electrical control. Its structure is compact, and its operating principle is direct and reliable. Details are as follows:

[0044] Figure 1 A schematic diagram of a quantitative filling nozzle for medicine bottles; Figure 2 for Figure 1 Front view of a quantitative filling nozzle for traditional Chinese medicine bottles. Figure 3 A schematic diagram showing the use of a quantitative filling nozzle and container for medicine bottles.

[0045] The cap 1 serves as the main structural support and connects with the container opening. Its material can be polypropylene, polytetrafluoroethylene (PTFE), or stainless steel. In this embodiment, the cap 1 is made of polypropylene using injection molding, which provides good chemical stability and mechanical strength. In other embodiments, the cap 1 can also be made of stainless steel using precision casting followed by machining to meet higher cleanliness requirements. The cap 1 has mutually isolated injection channels 11 and venting channels 12. The injection channel 11 guides the injection pipe 2 through and provides a path for liquid inflow; the venting channel 12 provides an installation path for the venting pipe 4 to allow gas to escape from the container. This mutually isolated channel design helps separate the filling and venting processes, reducing mutual interference between them.

[0046] A sealing element 5 is provided around the end face of the cap 1 facing the container opening. The function of the sealing element 5 is to enhance the sealing performance between the cap 1 and the container opening, preventing liquid leakage and external contamination during the filling process. In this embodiment, the sealing element 5 is an O-ring made of EPDM rubber; in other embodiments, the sealing element 5 can also be a flat gasket or a shaped sealing ring, etc., with shaped sealing rings such as X-rings providing better resilience. The sealing element 5 is installed in a sealing groove (not shown in the figure) on the end face of the cap 1 by an interference fit. The depth of the sealing groove is 15%-25% smaller than the cross-sectional diameter of the sealing element 5 to ensure appropriate pre-compression.

[0047] The inlet end of the injection pipe 2 is used to connect to the liquid material supply equipment, and its outlet end passes through the injection channel 11 and extends below the pressure cap 1. The function of the injection pipe 2 is to form the main flow path of the liquid material from the supply equipment to the inside of the container. Its material can be stainless steel, glass, or food-grade plastic, etc. In this embodiment, the injection pipe 2 is made of stainless steel using a seamless pipe process, and the inner surface is electrolytically polished with an Ra value of no more than 0.4μm to ensure smooth liquid flow and easy cleaning.

[0048] A manual control valve 3 is installed on the injection pipe 2. The function of the manual control valve 3 is to provide a means of manual intervention in the filling process, allowing for manual shut-off of the liquid flow in case of automatic control failure or special needs. The installation position of the manual control valve 3 is 50-150mm from the upper surface of the cap 1, preferably 100mm, for ease of operation. In this embodiment, the manual control valve 3 adopts a ball valve structure, with a stainless steel valve body and polytetrafluoroethylene (PTFE) sealing material. In other embodiments, the manual control valve 3 can also be a butterfly valve or a needle valve, etc. The needle valve is suitable for applications requiring fine flow adjustment.

[0049] The extension of the injection tube 2 into the container includes a first branch tube 21 and a second branch tube 22 arranged in parallel.

[0050] The first branch pipe 21 serves as the main passage for filling the container with liquid. Its outlet faces directly into the container, and the inner diameter of the outlet is 5-20 mm, preferably 15 mm.

[0051] The second branch pipe 22 is equipped with a float valve mechanism, which includes a float core 23 slidably disposed within the second branch pipe 22. The function of the float core 23 is to sense changes in the liquid level within the container and to displace under the action of buoyancy. Its material can be low-density materials such as polypropylene, polytetrafluoroethylene, or metal coated with fluoroplastics. When the liquid level in the container rises to a set height, the float core 23 floats to a predetermined position under the action of buoyancy, and its top forms a seal against the liquid outlet of the first branch pipe 21, thereby automatically stopping the filling process. This mechanical linkage design, through the float core 23 directly sensing changes in the liquid level within its second branch pipe 22, utilizes the principle of buoyancy and gravity balance to achieve automatic control, eliminating the need for external power or complex electrical control systems.

[0052] Furthermore, the cross-sections of the inner cavities of the first branch pipe 21 and the second branch pipe 22 are rectangular. This shape provides stable guidance for the sliding of the float core 23, preventing the float core 23 from rotating during movement. In this embodiment, the cross-sections of the inner cavities of the first branch pipe 21 and the second branch pipe 22 are rectangular; in other embodiments, the cross-sections of the inner cavities of the first branch pipe 21 and the second branch pipe 22 can also be circular, elliptical, polygonal, or other shapes. The float core 23 is a wedge-shaped cylinder with a truncated apex. This shape helps to form an effective surface contact seal with the liquid outlet of the first branch pipe 21 when shut off. The wedge angle is 15-45 degrees, preferably 30 degrees. The sliding gap between the float core 23 and the inner wall of the second branch pipe 22 is controlled to be no more than 0.2 mm. This gap size ensures that the float core 23 slides smoothly while ensuring sufficient sensitivity in the liquid level response. Too large a gap will lead to excessive liquid leakage and affect the buoyancy response, while too small a gap may cause the float core 23 to jam. In this embodiment, the sliding gap is set to 0.15 mm; in other embodiments, the sliding gap can also be set to different values ​​such as 0.1 mm or 0.18 mm, as long as it meets the requirement of not exceeding 0.2 mm.

[0053] The end of the second branch pipe 22 has a constriction structure 24. The function of the constriction structure 24 is to axially limit the float core 23, preventing it from slipping out of the second branch pipe 22, and simultaneously limiting the lower limit position of the float core 23. The opening diameter of the constriction structure 24 is 0.5~2mm smaller than the maximum diameter of the float core 23. In this embodiment, the constriction structure 24 is formed by heat-sealing the end of the second branch pipe 22; in other embodiments, the constriction structure 24 can also be formed by installing an independent limiting ring, which is fixed to the end of the second branch pipe 22 by threaded connection or interference fit.

[0054] The exhaust pipe 4 extends through the exhaust channel 12. The function of the exhaust pipe 4 is to provide a dedicated channel for the discharge of gas from inside the container during the filling process. Its inner diameter is 5-20 mm, preferably 10 mm. A one-way valve 41 is installed on the exhaust pipe 4. The function of the one-way valve 41 is to allow gas to discharge only from inside the container to the outside, preventing liquid or external contaminants from flowing back in. The opening pressure of the one-way valve 41 is 0.5-2 kPa, preferably 1 kPa, to ensure that it can open under a small pressure difference. In this embodiment, the one-way valve 41 adopts a duckbill valve structure, and the valve body is made of silicone rubber; in other embodiments, the one-way valve 41 can also be a umbrella valve or a flap valve, etc. The portion of the exhaust pipe 4 extending to the lower side of the cap 1 is constructed as an upward-opening U-shaped bend. This structure can effectively prevent splashing liquid inside the container from splashing out through the exhaust pipe 4. In this embodiment, the depth of the U-shaped bend is 25 mm; in other embodiments, the depth of the U-shaped bend can also be different sizes such as 10 mm or 20 mm, or other bending shapes such as a J-shape.

[0055] Overall, this invention employs a combination of a cap 1 with mutually isolated injection channels 11 and venting channels 12, a first branch pipe 21 and a second branch pipe 22 arranged in parallel, a float 23 slidably disposed within the second branch pipe 22, a constriction structure 24, a manual control valve 3, a vent pipe 4, a one-way valve 41, a U-shaped bend, and a sealing element 5. This combination enables, to a certain extent, automatic control of the filling volume based on liquid level, achieving precise quantitative filling through purely mechanical means. Specifically, the rectangular cross-section of the branch pipe and the wedge-shaped float 23 improve guiding accuracy and sealing effect; the constriction structure 24 ensures that the float 23 is always in an effective working position; the manual control valve 3 provides additional operational flexibility; the one-way valve 41 and the U-shaped bend maintain the system's sealing performance; and the sealing element 5 ensures the airtightness of the interfaces. The synergistic effect of these features has a positive effect on improving filling accuracy, ensuring process hygiene, and simplifying equipment maintenance.

[0056] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A quantitative filling nozzle for medicine bottles, used for filling liquid materials into containers, characterized in that, include: The cap (1) is provided with an injection channel (11) and an exhaust channel (12) that are isolated from each other. The liquid injection pipe (2) has an inlet end for connecting to a liquid material supply device, and an outlet end that passes through the liquid injection channel (11) and extends to the bottom of the pressure cap (1). The extension portion of the liquid injection pipe (2) includes a first branch pipe (21) and a second branch pipe (22) arranged in parallel. The first branch pipe (21) serves as the main passage for filling the container with liquid. A float valve mechanism, comprising a float (23) slidably disposed within the second branch pipe (22); When the liquid level in the container rises to a set height, the float (23) floats to a predetermined position under the action of buoyancy, and its top end forms a seal blockage on the liquid outlet of the first branch pipe (21).

2. The quantitative filling nozzle for medicine bottles according to claim 1, characterized in that: The cross-section of the inner cavity of the first branch pipe (21) and the second branch pipe (22) is rectangular; The float (23) is a wedge-shaped column with a truncated top.

3. The quantitative filling nozzle for medicine bottles according to claim 2, characterized in that, The sliding gap between the float (23) and the inner wall of the second branch pipe (22) is no greater than 0.2 mm.

4. The quantitative filling nozzle for medicine bottles according to claim 1, characterized in that, The end of the second branch pipe (22) is formed with a constriction structure (24) for axially limiting the float (23).

5. The quantitative filling nozzle for medicine bottles according to claim 1, characterized in that, Further includes: A manual control valve (3) is installed on the pipeline of the injection pipe (2).

6. The quantitative filling nozzle for medicine bottles according to claim 1, characterized in that, Further includes: An exhaust pipe (4) extends through the exhaust passage (12).

7. The quantitative filling nozzle for medicine bottles according to claim 6, characterized in that, The exhaust pipe (4) is equipped with a one-way valve (41) that only allows gas to be discharged from inside the container.

8. The quantitative filling nozzle for medicine bottles according to claim 6, characterized in that, The portion of the exhaust pipe (4) extending to the underside of the cap (1) is configured as an upward-opening U-shaped bend.

9. The quantitative filling nozzle for medicine bottles according to claim 1, characterized in that, Further includes: A sealing element (5) is provided on the end face of the cap (1) facing the container opening.

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