High-chemical-resistance low-adsorption suction head with oil film

Abstract

The utility model relates to the technical field of pipettor suction heads, in particular to a high-chemical-resistance low-adsorption suction head with an oil film, which comprises a suction head tube, an oil film layer is arranged on the inner wall of the suction head tube, a fixed joint is fixedly mounted at the top end of the suction head tube, and a guide plugging component is arranged in the suction head tube. The guide plugging assembly comprises an upper set of fixing protruding blocks and a lower set of fixing protruding blocks which are symmetrical to each other and fixedly installed on the inner wall of the suction head pipe, a plurality of guide rods which are annularly arranged at equal intervals are fixedly installed between the upper set of fixing protruding blocks and the lower set of fixing protruding blocks, and rubber pistons are slidably connected to the guide rods, located in the suction head pipe and slidably connected with the suction head pipe. And a plurality of anti-skid convex blocks which are annularly arranged at equal intervals are fixedly mounted on the outer surface of the fixed joint. The protective film has the advantages of being high in chemical resistance, not prone to adhesion and residue protection, and convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of pipette tip technology, and more specifically, to a highly chemical-resistant and low-adsorption pipette tip with an oil film. Background Technology

[0002] Adsorption pipette tips, as key components for liquid sampling and processing, are widely used in laboratories, medical, chemical and other fields. There are many types of adsorption pipette tips on the market. Most adsorption pipette tips are made of transparent material. In addition, most adsorption pipette tips usually have filter septa and filling core inside, which can achieve the effect of filtration by using the filling core.

[0003] Traditional pipette tip designs primarily focus on liquid collection efficiency and connection stability. However, in certain specialized applications, such as those involving high-viscosity liquids, volatile liquids, or situations requiring the avoidance of cross-contamination, traditional pipette tips often exhibit problems such as strong adsorption and easy liquid residue. These types of tips often lack highly chemical-resistant protective structures, affecting sampling accuracy and efficiency. Therefore, we propose a highly chemical-resistant, low-adsorption pipette tip with an oil film. Utility Model Content

[0004] The purpose of this invention is to provide a highly chemical-resistant and low-adsorption suction tip with an oil film to solve the defects mentioned in the background art.

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

[0006] A highly chemical-resistant, low-adsorption pipette tip with an oil film includes a pipette tube. An oil film layer is provided on the inner wall of the pipette tube. A fixing connector is fixedly installed at the top of the pipette tube. A guide sealing assembly is provided inside the pipette tube. The guide sealing assembly includes two sets of symmetrical fixing protrusions fixedly installed on the inner wall of the pipette tube. A plurality of guide rods arranged in a ring at equal intervals are fixedly installed between the two sets of fixing protrusions. A rubber piston is slidably connected to the plurality of guide rods. The rubber piston is located inside the pipette tube and slidably connected to the pipette tube.

[0007] Preferably, the number of fixed protrusions in each group is 4 to 8, and the number of guide rods is equal to the number of multiple fixed protrusions in each group.

[0008] Preferably, the size of the rubber piston is adapted to the size of the suction tube, and the surface of the suction tube is provided with scale lines arranged along the length direction of the suction tube.

[0009] Preferably, a plurality of anti-slip protrusions arranged in a ring at equal intervals are fixedly installed on the outer surface of the fixed joint, and the number of the anti-slip protrusions is 3 to 6.

[0010] Preferably, an inner rubber bonding layer is provided on the inner surface of the fixed joint, and the inner rubber bonding layer and the fixed joint are integrally formed.

[0011] Preferably, a limiting frame is fixedly installed on the inner wall of the bottom cylinder of the fixed joint, and the limiting frame is provided with a plurality of conducting chambers arranged in a ring at equal intervals.

[0012] Preferably, each side of the limiting frame is provided with multiple through holes that communicate with the outside, and the cross section of the limiting frame is cross-shaped.

[0013] Preferably, the lower projection of the guide rod is located inside the lower projection of the fixed protrusion, and the vertical distance between the guide rod and the inner wall of the suction tube is greater than 1 mm.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model, through the provision of an oil film layer, can reduce the adsorption force of liquid on the inner wall of the pipette tip and improve the chemical resistance of the pipette tip, thereby improving the accuracy and efficiency of sampling.

[0016] 2. This utility model, through the setting of the guide sealing component, ensures that the rubber piston can move normally during the normal suction operation of the suction device. The setting of the rubber piston, when the suction head tube is placed horizontally, can prevent liquid from flowing into the suction device at the end of the suction head tube, thus avoiding contamination of the inside of the suction device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a sectional view of the fixed connector of this utility model;

[0019] Figure 3 This is a partial structural schematic diagram of the present invention;

[0020] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 This is a schematic diagram of the structure of the guide sealing assembly of this utility model;

[0022] The meanings of the labels in the diagram are as follows:

[0023] 1. Pipe tip; 10. Scale marks; 11. Oil film layer;

[0024] 2. Guide sealing assembly; 20. Fixing protrusion; 21. Guide rod; 22. Rubber piston;

[0025] 3. Fixed joint; 30. Anti-slip protrusion; 31. Inner rubber bonding layer; 32. Limiting frame; 33. Through hole; 34. Conducting chamber. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-5 This utility model provides a technical solution: a highly chemical-resistant and low-adsorption pipette tip with an oil film, including a pipette tube 1, and an oil film layer 11 disposed on the inner wall of the pipette tube 1. The oil film layer 11 can be made of an oleophilic and hydrophobic material. Specifically, the oleophilic and hydrophobic material can be made of oil-absorbing polypropylene fiber material, so as to form a uniform and dense oil film layer on the inner wall of the pipette tube 1. By setting this oil film layer, the adsorption force of liquid on the inner wall of the pipette tube 1 can be reduced, and the chemical resistance of the pipette tube 1 can be improved, thereby reducing the effect of liquid adhesion.

[0028] Specifically, a fixed connector 3 is fixedly installed at the top of the suction tube 1, and a guide sealing assembly 2 is provided inside the suction tube 1. The guide sealing assembly 2 includes two sets of fixed protrusions 20 that are symmetrically installed on the inner wall of the suction tube 1. Multiple guide rods 21 arranged in a ring at equal intervals are fixedly installed between the two sets of fixed protrusions 20. Rubber pistons 22 are slidably connected to the multiple guide rods 21. The rubber pistons 22 are located inside the suction tube 1 and are slidably connected to the suction tube 1, so as to realize the sealing operation of the suction tube 1 by using the rubber pistons 22. This ensures that when the suction tube 1 is placed horizontally, the liquid inside the suction tube 1 will not flow into the corresponding suction device, thus avoiding contamination. In addition, the rubber pistons 22 can slide normally, so as not to affect the normal operation of suction and other operations.

[0029] In this embodiment, the guide sealing component 2 is located in the upper half of the suction tube 1, so that the filter element separator and filling core can be installed normally inside the lower half of the suction tube 1.

[0030] Specifically, each group of fixed protrusions 20 has 4 to 8 pieces, and the number of guide rods 21 is equal to the number of fixed protrusions 20 in each group. The lower projection of the guide rod 21 is located inside the lower projection of the fixed protrusion 20, and the vertical distance between the guide rod 21 and the inner wall of the suction tube 1 is greater than 1 mm, so as to realize the normal guiding operation of the rubber piston 22.

[0031] Furthermore, the size of the rubber piston 22 is adapted to the size of the suction tube 1, making the sliding of the rubber piston 22 within the suction tube 1 more stable; a scale line 10 is provided on the surface of the suction tube 1 along the length direction of the suction tube 1, and the amount of liquid injected can be easily observed through the scale line 10.

[0032] In addition, a number of anti-slip protrusions 30 arranged in a ring at equal intervals are fixedly installed on the outer surface of the fixed joint 3. The number of anti-slip protrusions 30 is 3 to 6. The anti-slip protrusions 30 can play an anti-slip protection effect when assembling the fixed joint 3.

[0033] It is worth noting that an inner rubber bonding layer 31 is provided on the inner surface of the fixed connector 3. The inner rubber bonding layer 31 and the fixed connector 3 are integrally formed. The inner rubber bonding layer 31 can be stably stuck on the suction device, making the assembly operation more stable.

[0034] It is worth noting that a limiting frame 32 is fixedly installed on the inner wall of the bottom cylinder of the fixed joint 3. The limiting frame 32 is provided with multiple conducting chambers 34 arranged in a ring at equal intervals. Each side of the rod of the limiting frame 32 is provided with multiple through holes 33 that communicate with the outside. The cross section of the limiting frame 32 is cross-shaped to ensure normal air circulation. At the same time, the limiting frame 32 can play the role of normally limiting the rubber piston 22.

[0035] When using the oil-film-coated, highly chemical-resistant, low-adsorption pipette tip of this invention, the fixed connector 3 is stably fitted onto the external aspirator. As the aspirator performs aspiration or injection operations, the rubber piston 22 forms a closed environment with the pipette tip tube 1 and the external aspirator. At this time, as the aspirator performs aspiration or injection operations, it can drive the rubber piston 22 to move normally, thereby realizing the aspiration operation.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. High-resistance, low-adsorption oil-film tipped pipette comprising a pipette tube (1), characterized in that: An oil film layer (11) is provided on the inner wall of the suction tube (1). A fixed connector (3) is fixedly installed at the top of the suction tube (1). A guide sealing assembly (2) is provided inside the suction tube (1). The guide sealing assembly (2) includes two sets of fixed protrusions (20) that are symmetrical to each other and fixedly installed on the inner wall of the suction tube (1). A plurality of guide rods (21) arranged in a ring at equal intervals are fixedly installed between the two sets of fixed protrusions (20). A rubber piston (22) is slidably connected to the plurality of guide rods (21). The rubber piston (22) is located inside the suction tube (1) and slidably connected to the suction tube (1).

2. The high-resistance low-sorption probe with oil film according to claim 1, characterized in that: The number of fixed protrusions (20) in each group is 4 to 8, and the number of guide rods (21) is equal to the number of multiple fixed protrusions (20) in each group.

3. The high-resistance low-sorption probe with oil film according to claim 1, characterized in that: The size of the rubber piston (22) is adapted to the size of the suction tube (1), and the surface of the suction tube (1) is provided with scale lines (10) arranged along the length direction of the suction tube (1).

4. The high-resistance low-sorption probe with oil film according to claim 1, characterized in that: The outer surface of the fixed joint (3) is fixedly installed with a plurality of anti-slip protrusions (30) arranged in a ring at equal intervals, and the number of the anti-slip protrusions (30) is 3 to 6.

5. The high-resistance low-sorption probe with oil film according to claim 1, characterized in that: An inner rubber bonding layer (31) is provided on the inner surface of the fixed joint (3), and the inner rubber bonding layer (31) and the fixed joint (3) are integrally formed.

6. The high-resistance low-sorption probe with oil film according to claim 5, characterized in that: A limiting frame (32) is fixedly installed on the inner wall of the bottom cylinder of the fixed joint (3), and the limiting frame (32) is provided with a plurality of conducting chambers (34) arranged in a ring at equal intervals.

7. The high-resistance low-sorption probe with oil film according to claim 6, characterized in that: The limiting frame (32) has multiple through holes (33) on each side of the rod that are connected to the outside. The cross section of the limiting frame (32) is cross-shaped.

8. The high resistant low adsorption probe with oil film according to claim 1, characterized in that: The lower projection of the guide rod (21) is located inside the lower projection of the fixed protrusion (20), and the vertical distance between the guide rod (21) and the inner wall of the suction tube (1) is greater than 1 mm.

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