Gas one-way filter valve

Abstract

The utility model discloses a gas one-way filter valve which comprises a one-way valve body upper shell, a micron filter membrane, an upper sealing gasket, a valve element fixing O-shaped ring, a one-way valve element, a lower sealing gasket and a one-way valve body lower shell. The upper surface of the upper sealing gasket is in contact with the internal threads, the inner side wall of the upper sealing gasket is attached to the micron filtering membrane, opening is achieved when the pressure of the reagent bottle is lower than the external atmospheric pressure, and sealing and air-tight can be achieved within a certain range when the volatilization pressure of internal liquid is larger than the pressure outside the bottle; by the adoption of the structure, it is effectively guaranteed that a mobile phase can be normally extracted, volatilized gas does not overflow into air, experimenters are protected, the valve element and the filter membrane are convenient to replace and can be smoothly replaced as long as threads are opened, the market price of one valve element is only 0.2 yuan, the selling price of the whole module is basically 50-150 yuan, and therefore cost is greatly saved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid chromatography mobile phase sealing, in particular to a gas one-way filtering valve. Background Art

[0002] The mobile phase is the substance that carries the components to be tested forward during the chromatography process. In analytical techniques such as liquid chromatography and gas chromatography, the mobile phase plays a key role in the separation process. Anti-volatility of the mobile phase refers to preventing the volatilization and leakage of the solvent when using the mobile phase solvent bottle. Generally, the solvent bottle is sealed with a bottle cap or a valve.

[0003] However, those currently on the market are all disposable, with a validity period of half a year. After the expiration, they will all be scrapped. In addition, the valve core and filter membrane cannot be replaced individually and need to be replaced as a whole. The price of the entire module is basically 50-150 yuan, which greatly increases the cost. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art and provides a gas one-way filter valve, which is opened when the pressure of the reagent bottle is lower than the external atmospheric pressure. When the volatilization pressure of the internal liquid is greater than the pressure outside the bottle, a leak-proof seal can be achieved within a certain range, effectively ensuring that the mobile phase can be extracted normally and the volatilized gas does not overflow into the air, thus protecting the experimenters and facilitating the replacement of the valve core and the filter membrane. The valve core and the filter membrane can be replaced smoothly by simply opening the thread. The market price of a valve core is only 0.2 yuan, while the price of the entire module is basically 50-150 yuan, thereby greatly saving costs.

[0005] The utility model also provides a gas one-way filter valve as described above, comprising an upper outer shell of a one-way valve body, a micron filter membrane, an upper sealing gasket, a valve core fixing O-ring, a one-way valve core, a lower sealing gasket and a lower outer shell of the one-way valve body, wherein the inner side wall of the upper outer shell of the one-way valve body is threadedly connected to the lower outer shell of the one-way valve body.

[0006] According to the one-way gas filter valve, the upper surface of the upper sealing gasket contacts the upper shell of the one-way valve body, the inner wall of the upper sealing gasket 3 fits the micron filter membrane 2, and the micron filter membrane is fixed by the upper sealing gasket to improve stability and sealing.

[0007] According to the described one-way gas filter valve, the side surface of the lower sealing gasket is fitted with the lower outer shell of the one-way valve body, and the inner wall of the lower sealing gasket is fitted with the one-way valve core. The one-way valve core is fixed by the lower sealing gasket, which facilitates installation while improving stability and sealing.

[0008] According to the one-way gas filter valve, a fluororubber O-ring is provided on the side surface of the lower shell of the one-way valve body to improve the sealing performance during connection.

[0009] According to the one-way gas filter valve, the side surface of the upper shell of the one-way valve body is rotatably connected with an L-shaped acrylic frame, and the right surface of the L-shaped acrylic frame is provided with a label to facilitate the pasting of paper labels and time button labels, and has an expiration reminder function (the valve core is contaminated by a small amount of dust, resulting in reduced sealing, and is generally replaced every six months).

[0010] According to the one-way gas filter valve, a lower thread is provided at the lower end of the lower shell of the one-way valve body.

[0011] According to the one-way gas filter valve, the side surface of the lower shell of the one-way valve body is provided with a side thread, and the inner side wall of the upper shell of the one-way valve body is provided with an internal thread, and the side thread is adapted to the internal thread.

[0012] According to the one-way gas filter valve, an upper airway is provided inside the upper shell of the one-way valve body, and a lower airway is provided inside the lower shell of the one-way valve body, and the lower airway is communicated with the upper airway.

[0013] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0015] Figure 1 This is an exploded view of a gas one-way filter valve of the utility model;

[0016] Figure 2 This is the overall structure diagram of a gas one-way filter valve of the utility model;

[0017] Figure 3 This is a cross-sectional view of the lower shell of a one-way valve body of a gas one-way filter valve of the utility model;

[0018] Figure 4 The utility model is a cross-sectional view of an upper shell of a one-way valve body of a gas one-way filter valve.

[0019] Legend:

[0020] 1. Check valve body upper shell; 2. Micron filter membrane; 3. Upper sealing gasket; 4. Valve core fixing O-ring; 5. Check valve core; 6. Lower sealing gasket; 7. Check valve body lower shell; 8. Fluorine rubber O-ring; 9. L-shaped acrylic frame; 10. Label; 11. Lower thread; 12. Side thread; 13. Internal thread; 14. Lower airway; 15. Upper airway. DETAILED DESCRIPTION

[0021] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0022] Reference Figure 1-4 The utility model embodiment is a gas one-way filter valve, which includes a one-way valve body upper shell 1, a micron filter membrane 2, an upper sealing gasket 3, a valve core fixing O-ring 4, a one-way valve core 5, a lower sealing gasket 6 and a one-way valve body lower shell 7. The inner side wall of the one-way valve body upper shell 1 is threadedly connected with the one-way valve body lower shell 7, the upper surface of the upper sealing gasket 3 contacts the one-way valve body upper shell 1, the inner side wall of the upper sealing gasket 3 fits with the micron filter membrane 2, the side surface of the lower sealing gasket 6 fits with the one-way valve body lower shell 7, and the inner side wall of the lower sealing gasket 6 fits with the one-way valve core 5, a fluororubber O-type sealing ring 8 is provided on the side surface of the lower shell 7 of the one-way valve body, an L-shaped acrylic frame 9 is rotatably connected to the side surface of the upper shell 1 of the one-way valve body, a label 10 is provided on the right surface of the L-shaped acrylic frame 9, a lower thread 11 is provided at the lower end of the lower shell 7 of the one-way valve body, a side thread 12 is provided on the side surface of the lower shell 7 of the one-way valve body, an internal thread 13 is provided on the inner side wall of the upper shell 1 of the one-way valve body, the side thread 12 is matched with the internal thread 13, a lower airway 14 is provided inside the lower shell 7 of the one-way valve body, and the lower airway 14 is communicated with the upper airway 15.

[0023] Working principle: connect the gas one-way filter valve to the reagent bottle, the one-way valve core 5 is opened when the pressure of the reagent bottle is lower than the external atmospheric pressure, and when the internal liquid evaporation pressure is greater than the pressure outside the bottle, it can be sealed and leak-proof within a certain range. It effectively ensures that the mobile phase can be extracted normally and the volatile gas does not overflow into the air, thus protecting the experimenters. It is also easy to install and disassemble, and the parts are highly replaceable, so it is convenient to replace the one-way valve core 5. The market price of a one-way valve core 5 is only 0.2 yuan, while the price of the entire module is basically 50-150 yuan, which greatly saves costs.

[0024] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A one-way gas filter valve, characterized in that: include: A one-way valve body upper shell (1), a micron filter membrane (2), an upper sealing gasket (3), a valve core fixing O-ring (4), a one-way valve core (5), a lower sealing gasket (6) and a one-way valve body lower shell (7); the inner side wall of the one-way valve body upper shell (1) is threadedly connected to the one-way valve body lower shell (7).

2. A gas one-way filter valve according to claim 1, characterized in that: The upper surface of the upper sealing gasket (3) is in contact with the upper shell (1) of the one-way valve body, and the inner side wall of the upper sealing gasket (3) is in contact with the micron filter membrane (2).

3. A gas one-way filter valve according to claim 1, characterized in that: The side surface of the lower sealing gasket (6) is in contact with the lower outer shell (7) of the one-way valve body, and the inner side wall of the lower sealing gasket (6) is in contact with the one-way valve core (5).

4. A gas one-way filter valve according to claim 1, characterized in that: A fluororubber O-type sealing ring (8) is provided on the side surface of the lower shell (7) of the one-way valve body.

5. A one-way gas filter valve according to claim 1, characterized in that: An L-shaped acrylic frame (9) is rotatably connected to the side surface of the upper shell (1) of the one-way valve body, and a label (10) is provided on the right surface of the L-shaped acrylic frame (9).

6. A gas one-way filter valve according to claim 1, characterized in that: A lower thread (11) is provided at the lower end of the one-way valve body lower shell (7).

7. A gas one-way filter valve according to claim 1, characterized in that: The side surface of the one-way valve body lower shell (7) is provided with a side thread (12), and the inner side wall of the one-way valve body upper shell (1) is provided with an internal thread (13), and the side thread (12) is matched with the internal thread (13).

8. A gas one-way filter valve according to claim 1, characterized in that: An upper airway (15) is provided inside the upper shell (1) of the one-way valve body, and a lower airway (14) is provided inside the lower shell (7) of the one-way valve body, wherein the lower airway (14) is in communication with the upper airway (15).

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