A novel heterogeneous aerosol system with an inverted leak-proof valve

Abstract

This utility model discloses a novel anti-leakage valve for inverted use in a heterogeneous aerosol system, including a fixed cap, a valve stem, and an inverted anti-leakage mechanism. The inverted anti-leakage mechanism includes a first valve chamber, a steel ball, and a second valve chamber. The bottom of the second valve chamber has a liquid inlet pipe, and the top of the first valve chamber has a valve stem with a liquid inlet hole at one end. When the container is inverted, the liquid inlet of the liquid inlet pipe is exposed above the liquid surface, preventing liquid from entering; only gas can enter. The steel ball falls onto the surface of the first valve chamber due to gravity and forms a seal. When the valve stem is pressed, the second channel connects to the outside, and the first channel connects to the inside of the container. A pressure difference is created between the first and second channels due to the seal of the steel ball, further pressing the steel ball against the contact surface of the first valve chamber, thereby closing the first channel and preventing internal gas from leaking to the outside through the liquid outlet of the aerosol valve.

Description

Technical Field

[0001] This utility model belongs to the technical field of heterogeneous aerosol systems, specifically relating to a leak-proof valve for inverted use in a heterogeneous aerosol system. Background Technology

[0002] In homogeneous aerosol systems, the drug, excipients, and propellant form a single, clear true solution or homogeneous mixture within the container. The single liquid phase (the mixture of propellant and drug solution) is instantly vaporized through a valve flash vaporization process, forming fine droplets. In heterogeneous aerosol systems, the interface between the propellant and the drug solution / excipients is distinct, and a true solution or homogeneous mixture cannot be formed. The system relies solely on the propellant gas pressure to expel the separated or partially separated phases (drug solution or drug solution / excipient mixture). In the upright position, the contents of the container are divided from top to bottom into: a top space (pure gaseous propellant, insoluble or sparingly soluble in the contents, with pressure decreasing as the contents decrease) and a liquid layer (a heterogeneous suspension or emulsion, with drug particles / droplets dispersed in the solvent or oil phase, showing stratification upon standing). The inlet of the liquid inlet tube is located near the bottom of the container. When used upright, its inlet is not in the liquid layer, ensuring that the liquid contents of the drug enter the valve system through the liquid inlet tube. When the valve stem is pressed, the liquid contents enter the valve system through the liquid inlet tube under the pressure of the propellant and are then atomized through the nozzle. At the same time, the propellant gas in the top space expands, promptly replenishing the space vacated by the discharged liquid and maintaining the dynamic pressure balance inside the container.

[0003] In existing heterogeneous aerosol systems, when the container is inverted, the liquid inlet at the bottom is exposed to the top space. When the valve is activated, the propellant gas entering the valve system through the liquid inlet is no longer the liquid contents, but rather the high-pressure propellant gas from the top. This propellant gas is directly released into the atmosphere through the valve, essentially "depressurizing" the system, resulting in a permanent loss of a significant amount of gas and pressure within the container. This erroneous operation causes the internal pressure to drop below a critical point, failing to provide sufficient power for subsequent normal atomization. This internal depressurization renders the product unusable, preventing it from achieving the expected performance. Utility Model Content

[0004] This addresses the issue that existing heterogeneous aerosol systems will depressurize and cease normal operation when used in an inverted state.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a novel anti-leakage valve for a heterogeneous aerosol system used in an inverted manner, comprising a fixed cover, a valve stem, and an inverted anti-leakage mechanism. The inverted anti-leakage mechanism includes a first valve chamber, a steel ball, and a second valve chamber. The first valve chamber is located at the top of the second valve chamber, and the first and second valve chambers are connected to form a first channel. The steel ball is located in the first channel. A liquid inlet tube is provided at the bottom of the second valve chamber, and a valve stem is provided at the top of the first valve chamber. A second channel is formed between the first valve chamber and the valve stem. A spring is provided between the bottom of the valve stem and the first valve chamber. The top of the valve stem is located in the opening of the fixed cover, and the bottom of the valve stem has a protruding edge, which limits and locks the bottom of the valve stem in the fixed cover. A liquid inlet hole is provided at one end of the valve stem near the protruding edge.

[0006] Furthermore, when the container is used upright, the steel ball falls onto the surface of the second valve chamber due to gravity, separating from the first valve chamber and opening the first channel. The liquid enters the second channel through the liquid inlet tube via the first channel. Pressing down the valve stem in the fixed cover causes the liquid inlet hole of the valve stem to fall into the second channel. The spring is compressed and contracted, and the liquid in the second channel enters the central channel of the valve stem through the liquid inlet hole and is then sprayed outward.

[0007] Furthermore, when the container is inverted, the steel ball falls onto the surface of the first valve chamber due to gravity and comes into contact with the seal. At this time, the first channel is closed. When the valve rod is pressed, the second channel is connected to the outside, and the first channel is connected to the inside of the container. A pressure difference is formed between the first channel and the second channel due to the sealing effect of the steel ball, which further presses the steel ball against the contact surface of the first valve chamber, thereby closing the first channel.

[0008] Furthermore, an outer sealing ring is provided between the bottom of the fixed cover and the container.

[0009] Furthermore, an inner sealing ring is fitted around the outer periphery of the valve stem, and the inner sealing ring is located between the fixed cover and the protruding edge.

[0010] The present invention has the following advantages: When the container is inverted, the inlet of the liquid inlet tube inside the container is exposed outside the liquid surface. Liquid cannot enter through the inlet of the liquid inlet tube, only gas can enter. The steel ball falls to the surface of the first valve chamber due to gravity and makes contact with the seal. At this time, the first channel is closed. When the valve rod is pressed, the second channel is connected to the outside and the first channel is connected to the inside of the container. A pressure difference is formed between the first channel and the second channel due to the sealing of the steel ball, which further presses the steel ball to the contact surface of the first valve chamber, thereby closing the first channel and preventing the internal gas from leaking to the outside through the liquid outlet channel of the aerosol valve. Attached Figure Description

[0011] Figure 1 This is an exploded view of the present invention;

[0012] Figure 2 This is a cross-sectional view of the present invention in its upright position;

[0013] Figure 3 for Figure 2 A magnified structural diagram at point A;

[0014] Figure 4 This is an inverted sectional view of the present invention;

[0015] Figure 5 for Figure 4 A magnified structural diagram at point B;

[0016] Figure 6 This is a diagram showing the container of this utility model in its upright position during use.

[0017] Figure 7 This is a diagram showing the container of this utility model in an inverted usage state;

[0018] Figure 8 This is a schematic diagram of the valve stem structure of this utility model.

[0019] Reference numerals: Fixed cover 10; Valve stem 20; Inverted anti-leakage mechanism 30; First valve chamber 31; Steel ball 32; Second valve chamber 33; First channel 34; Liquid inlet tube 35; Spring 22; Second channel 21; Protruding edge 23; Liquid inlet hole 24; Container 101; Liquid surface 102; Liquid 103; Outer sealing ring 301; Inner sealing ring 302. Detailed Implementation

[0020] like Figures 1 to 8 As shown, a novel anti-leakage valve for a heterogeneous aerosol system used in an inverted manner includes a fixed cap 10, a valve stem 20, and an inverted anti-leakage mechanism 30, all fixedly connected to the top opening of the container. The inverted anti-leakage mechanism 30 includes a first valve chamber 31, a steel ball 32, and a second valve chamber 33. The first valve chamber 31 is located on top of the second valve chamber 33, and the first and second valve chambers 31 are connected to form a first channel 34. The steel ball 32 is disposed within the first channel 34. The bottom of the valve chamber 33 is provided with a liquid inlet tube 35, and the top of the first valve chamber 31 is provided with a valve stem 20. A second channel 21 is formed between the first valve chamber 31 and the valve stem 20. A spring 22 is provided between the bottom of the valve stem 20 and the first valve chamber 31. The top of the valve stem 20 is located in the opening of the fixed cover 10. The bottom of the valve stem 20 is provided with a protruding edge 23, so that the bottom of the valve stem 20 is limited and locked in the fixed cover 10. The valve stem 20 is provided with a liquid inlet hole 24 at one end near the protruding edge 23.

[0021] In practical implementation, when used upright, the liquid level 102 of container 101 completely submerges the inlet at the lower end of the liquid inlet pipe 35, allowing only liquid 103 to enter through the liquid inlet pipe 35. The steel ball 32 falls onto the surface of the second valve chamber 33 due to gravity, separating from the first valve chamber 31 and opening the first channel 34. Liquid 103 then enters the second channel 21 through the liquid inlet pipe 35 and the first channel 34. When the valve stem 20 in the fixed cover 10 is pressed, the liquid inlet hole 2 of the valve stem 20 is opened. 4. When the liquid falls into the second channel 21, the spring 22 is compressed and contracted. The liquid 103 in the second channel 21 enters the central channel of the valve stem 20 through the liquid inlet hole 24 and then sprays out. When the pressure on the valve stem 20 is stopped, the spring 22 pushes the valve stem 20 upward by its own elastic force. The liquid inlet hole 24 of the valve stem 20 moves to the outside of the fixed cover, and the liquid cannot enter the central channel of the valve body. The protruding edge 23 at the bottom of the valve stem 20 abuts against the inside of the fixed cover 10 to complete the seal.

[0022] When the container is inverted, the inlet of the liquid inlet tube 35 inside the container is exposed outside the liquid surface 102. Liquid 103 cannot enter through the inlet of the liquid inlet tube 35, only gas can enter. The steel ball 32 falls to the surface of the first valve chamber 31 due to gravity and makes contact with the seal. At this time, the first channel 34 is closed. When the valve rod 20 is pressed, the second channel 21 is connected to the outside, and the first channel 34 is connected to the inside of the container. A pressure difference is formed between the first channel 34 and the second channel 21 due to the seal of the steel ball 32, which further presses the steel ball 32 against the contact surface of the first valve chamber 31, thereby closing the first channel 34 and preventing the internal gas from leaking to the outside through the liquid outlet channel of the aerosol valve.

[0023] The bottom of the fixed cover 10 is provided with an outer sealing ring 301. When the fixed cover 10 is fixedly installed with the container 101, the outer sealing ring 301 between the fixed cover 10 and the container 101 can make the installation between the fixed cover 10 and the container 101 more airtight and prevent leakage.

[0024] The valve stem 20 is fitted with an inner sealing ring 302 on its outer periphery. The inner sealing ring 302 is fitted on the upper surface of the protruding edge 23 at the bottom of the valve stem 20. When the spring 22 pushes the valve stem 20 to move upward, and the protruding edge 23 of the valve stem 20 abuts against the bottom of the fixed cover 10, the inner sealing ring between the protruding edge 23 and the bottom of the fixed cover 10 can make the sealing between the valve stem 20 and the fixed cover 10 better and prevent leakage.

Claims

1. A new type of non-homogeneous aerosol system inverted use of leak-proof valve, characterized in that, The device includes a fixed cover (10), a valve stem (20), and an inverted leak-proof mechanism (30). The inverted leak-proof mechanism (30) includes a first valve chamber (31), a steel ball (32), and a second valve chamber (33). The first valve chamber (31) is located on top of the second valve chamber (33). The first valve chamber (31) and the second valve chamber (33) are connected to form a first channel (34). The steel ball (32) is located in the first channel (34). The bottom of the second valve chamber (33) is provided with a liquid inlet tube (35). The top of the valve stem (20) is provided with a valve stem (20), and a second channel (21) is formed between the first valve chamber (31) and the valve stem (20). A spring (22) is provided between the bottom of the valve stem (20) and the first valve chamber (31). The top of the valve stem (20) is located in the opening of the fixed cover (10), and the bottom of the valve stem (20) is provided with a protruding edge (23) so that the bottom of the valve stem (20) is limited and locked in the fixed cover (10). The valve stem (20) is provided with a liquid inlet hole (24) at one end near the protruding edge (23).

2. The new non-homogeneous gas aerosol system inverted use leak-proof valve according to claim 1, characterized in that, When the container (101) is in the correct position, the steel ball (32) falls onto the surface of the second valve chamber (33) due to gravity. The steel ball (32) separates from the first valve chamber (31), the first channel (34) opens, and the liquid (103) enters the second channel (21) through the liquid inlet tube (35) and the first channel (34). Pressing down the valve stem (20) in the fixed cover (10) causes the liquid inlet hole (24) of the valve stem (20) to fall into the second channel (21). The spring (22) is squeezed and contracted, and the liquid (103) in the second channel (21) enters the central channel of the valve stem through the liquid inlet hole (24) of the valve stem (20) and is then sprayed out.

3. The new non-homogeneous gas aerosol system inverted use leak-proof valve according to claim 2, characterized in that, When the container (101) is inverted, the steel ball (32) falls onto the surface of the first valve chamber (31) due to gravity and comes into contact with the seal. At this time, the first channel (34) is closed. When the valve rod (20) is pressed, the second channel (21) is connected to the outside, and the first channel (34) is connected to the inside of the container. A pressure difference is formed between the first channel (34) and the second channel (21) due to the sealing of the steel ball (32), which further presses the steel ball (32) against the contact surface of the first valve chamber (31), thereby closing the first channel (34).

4. The new non-homogeneous gas aerosol system inverted use leak-proof valve according to claim 3, characterized in that, An outer sealing ring (301) is provided between the bottom of the fixed cover (10) and the container (101).

5. The leak-proof valve for inverted use in the novel heterogeneous aerosol system according to claim 4, characterized in that, The valve stem (20) is fitted with an inner sealing ring (302) on its outer periphery, and the inner sealing ring (302) is located between the fixed cover (10) and the protruding edge (23).

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