Negative pressure filter fitting

Abstract

This utility model discloses a negative pressure filter connector, comprising: a stopper head, facing each other, for connecting glassware of different specifications; a flow guide tube, inserted inside the stopper head, for transferring samples from the glassware; and a filter layer provided on one and / or both sides of the stopper head. In this utility model, the trapezoidal stoppers facing each other fit tightly against the mouths of glassware of different specifications, and the interference fit between the flow guide tube and the insertion hole forms a sealed flow channel. This allows for rapid connection, negative pressure sealing, sample transfer, and filtration purification of glassware of different specifications, effectively simplifying the cumbersome process of sealing adjustment and assembling the filter device in traditional operations.

Description

Technical Field

[0001] This utility model relates to the field of filter connector technology, specifically to a negative pressure filter connector. Background Technology

[0002] Negative pressure filtration of glassware of different sizes in the laboratory is a conventional technique that uses negative pressure sources such as vacuum pumps to generate pressure differences to achieve solid-liquid or gas-liquid separation. It is widely used in sample pretreatment, solvent purification, microbial culture and other scenarios.

[0003] Existing laboratory glass negative pressure filtration devices of various sizes mainly rely on the physical fit of the glass frosted interface, with metal clamps used to mechanically fasten the upper and lower glass components. However, the sealing of the glass frosted interface requires precise alignment. Large-diameter devices are more difficult to adjust due to their wide contact surface, while small-diameter devices are prone to hand slippage during clamping due to the narrow operating space. Furthermore, the clamping force of the clamps depends on manual control, and uneven tightness can lead to local seal failure. The locking and unlocking steps of the clamps during assembly and disassembly are cumbersome, slowing down the experimental pace. In addition, the glass frosted surface is prone to fine scratches after long-term use, forming hidden leakage channels, especially when handling organic solvents or applying strong negative pressure, which increases the risk of leakage. Utility Model Content

[0004] The purpose of this utility model is to provide a negative pressure filter connector in order to solve the above problems.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution, including:

[0006] The stoppers are arranged facing each other to accommodate glassware of different sizes.

[0007] A flow guide tube, inserted inside the stopper, is used to transfer samples from glassware.

[0008] As a further description of the above technical solution, the plug head has a trapezoidal cross-section.

[0009] As a further description of the above technical solution, the two sets of plugs are arranged coaxially.

[0010] As a further description of the above technical solution, the diameter of the top of the plug is 20-30mm.

[0011] As a further description of the above technical solution, the bottom diameter of the plug is 30-40mm.

[0012] As a further description of the above technical solution, the plug head has an insertion hole through the middle.

[0013] As a further description of the above technical solution, the guide tube is inserted into the insertion hole of the plug.

[0014] As a further description of the above technical solution, the diameter of the insertion hole is 2-3 mm.

[0015] As a further description of the above technical solution, the diameter of the guide tube is larger than the diameter of the insertion hole.

[0016] As a further description of the above technical solution, a filter layer is provided on one and / or both sides of the plug head.

[0017] The beneficial effects of this utility model are as follows:

[0018] In this invention, the trapezoidal plugs arranged in opposite directions fit tightly against the mouths of glassware of different sizes. Together with the interference fit between the guide tube and the insertion hole, a closed flow channel is formed, which can quickly complete the rapid docking, negative pressure sealing, sample transfer and filtration purification of glassware of different sizes, effectively simplifying the cumbersome process of sealing debugging and assembling the filtration device in traditional operations.

[0019] To more clearly illustrate the structural features and functions of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the negative pressure filter connector of this utility model.

[0021] Figure label:

[0022] 1. Plug; 11. Insertion hole; 2. Guide tube; 3. Filter layer. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0024] like Figure 1 As shown, in one embodiment, a negative pressure filter connector includes: a plug 1 and a flow guide tube 2;

[0025] One set of stoppers 1 are arranged facing each other, and can be quickly connected by adapting to the mouths of glassware of different sizes (such as standard ground glass joints 19#, 24#, 29# or non-standard diameters); while the guide tube 2 is inserted into the stopper 1, and uses negative pressure to directionally transfer the sample (such as liquid sample) in the glassware, replacing the cumbersome operation of relying on the glass frosted surface for sealing, thus improving adaptability and operation efficiency.

[0026] For example, the two sets of plugs 1 are arranged coaxially (i.e., the two plugs 1 are symmetrically distributed along the same central axis) to ensure that the coaxiality of the guide tube 2 is consistent after installation, and to avoid liquid residue or flow segregation;

[0027] Specifically, the stopper 1 has a trapezoidal cross-section and a top diameter of 20-30mm, which can fit the mouth of a medium-sized glass container (such as a 250mL conical flask); correspondingly, the bottom diameter of the stopper 1 is 30-40mm, which can enhance the sealing stability.

[0028] Furthermore, an insertion hole 11 is opened through the middle of the plug 1 along the axis, and the guide tube 2 is inserted into the insertion hole 11 in an interference fit manner.

[0029] Specifically, the diameter of the insertion hole 11 is 2-3mm, which is suitable for the conventional sample flow rate and avoids clogging due to being too thin or leakage due to being too thick; while the diameter of the guide tube 2 is larger than the diameter of the insertion hole 11 (for example, when the diameter of the insertion hole 11 is 2.5mm, the diameter of the guide tube 2 is 2.6-2.8mm). With the help of the elastic deformation of the plug material (such as silicone, rubber and other elastomers), the guide tube 2 squeezes the hole wall to form a self-sealing structure, which can not only fix the guide tube 2 to prevent it from falling off due to negative pressure, but also block the leakage channel and improve the stability of negative pressure.

[0030] It should be noted that the plug 1 is provided with a filter layer 3 on one side and / or both sides (one side is adapted for unidirectional filtration, and both sides support bidirectional purification).

[0031] Specifically, filter layer 3 can be activated carbon or similar materials, which can be used to filter the sample during sample transfer by utilizing its porous adsorption structure to remove pigments and organic impurities from the sample.

[0032] Working principle: When in use, the trapezoidal stoppers 1, which are set in opposite directions, fit tightly against the mouths of glassware of different sizes. Together with the interference fit between the guide tube 2 and the insertion hole 11, a closed flow channel is formed. When an external negative pressure source is connected, a pressure difference is generated inside the device, which drives the sample in the glassware to flow in a directional manner along the guide tube 2. When it flows through the filter layer 3 on one or both sides of the stopper 1, impurities are intercepted. The purified sample is transferred to another glassware through the guide tube 2.

[0033] Through the above technical solution, this application can quickly complete the rapid docking, negative pressure sealing, sample transfer and filtration purification of different sized vessels, effectively simplifying the cumbersome process of sealing debugging and filtration device assembly in traditional operations.

[0034] 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 negative pressure filter connector, characterized in that, include: The stopper (1) is set facing each other and is used to connect glassware of different sizes; The guide tube (2) is inserted inside the stopper (1) and is used to transfer the sample in the glass container.

2. The negative pressure filter connector according to claim 1, characterized in that, The plug (1) has a trapezoidal cross-section.

3. The negative pressure filter connector according to claim 2, characterized in that, The two sets of plugs (1) are arranged coaxially.

4. The negative pressure filter connector according to claim 2, characterized in that, The top diameter of the plug (1) is 20-30 mm.

5. The negative pressure filter connector according to claim 2, characterized in that, The bottom diameter of the plug (1) is 30-40mm.

6. The negative pressure filter connector according to claim 1, characterized in that, The plug (1) has an insertion hole (11) through the middle.

7. The negative pressure filter connector according to claim 1, characterized in that, The guide tube (2) is inserted into the insertion hole (11) of the plug (1).

8. The negative pressure filter connector according to claim 7, characterized in that, The diameter of the insertion hole (11) is 2-3 mm.

9. The negative pressure filter connector according to claim 7, characterized in that, The diameter of the guide tube (2) is larger than the diameter of the insertion hole (11).

10. The negative pressure filter connector according to claim 1, characterized in that, The plug (1) is provided with a filter layer (3) on one and / or both sides.

Images