CN219308163U

CN219308163U - Needle type filter device and needle type filter thereof

Info

Publication number: CN219308163U
Application number: CN202320325117.1U
Authority: CN
Inventors: 汪悦; 李跃兵
Original assignee: Xixin Shanghai Medical Technology Co ltd
Current assignee: Xixin Shanghai Medical Technology Co ltd
Priority date: 2023-02-27
Filing date: 2023-02-27
Publication date: 2023-07-07
Anticipated expiration: 2033-02-27

Abstract

The utility model provides a needle type filtering device and a needle type filter thereof, wherein the needle type filter comprises a filtering disc and a needle tube arranged on the filtering disc, and is characterized in that the filtering disc comprises an inner filter screen and an outer protective shell arranged on the outer circumference of the inner filter screen; the needle tube comprises a first tube body and a second tube body which are coaxially arranged at the central positions of two end surfaces of the filter disc, and the whole needle tube formed by the first tube body and the second tube body is gradually tightened from a free port of the first tube body to a free port of the second tube body; the free end port of the first pipe body is used for being connected with the injector, and the free end port of the second pipe body is used for outputting filtered liquid. The utility model forms a structure with large input port and small output port of the needle tube, and the structure has the characteristics of saving labor when pushing in the solution and being more convenient when collecting the filtered solution; the clamping structure is arranged, so that the needle tube is more tightly arranged on the injector, and the needle tube is effectively prevented from falling off when the solution is injected.

Description

Needle type filter device and needle type filter thereof

Technical Field

The utility model relates to the technical field of biological experiment vessels, in particular to a needle type filtering device and a needle type filter thereof.

Background

Laboratory vessels for liquid filtration are commonly used in needle filter type biological laboratories. The existing needle filter usually adopts a straight-through needle tube, and the tube diameter of the needle tube with the structure is usually matched with that of an injector so as to inject the solution. However, the needle filter is suitable for filtering trace liquid, when the pipe diameter of the needle tube is matched with the injector, the liquid outlet end of the needle tube has larger caliber when outputting liquid, and the needle filter is not beneficial to collecting the filtered liquid by adopting a smaller container.

Disclosure of Invention

The present utility model addresses the above-described deficiencies of the prior art by providing a needle filter device and a needle filter therefor.

According to one aspect of the present utility model, there is provided a needle filter comprising a filter disc and a needle tube provided on the filter disc, wherein the filter disc comprises an inner filter mesh and an outer protective shell provided on an outer circumference of the inner filter mesh; the needle tube comprises a first tube body and a second tube body which are coaxially arranged at the central positions of two end surfaces of the filter disc, and the whole needle tube formed by the first tube body and the second tube body is in a structure that the free port of the first tube body is gradually tightened to the free port of the second tube body; the free end port of the first pipe body is used for being connected with a syringe, and the free end port of the second pipe body is used for outputting filtered liquid.

Preferably, the inner filter screen and the outer protective shell are arranged in an equal plane.

Preferably, the inner filter screen comprises a filter screen shell, a first microporous filter membrane layer, a purification adsorption layer and a second microporous filter membrane layer which are arranged in the filter screen shell and are sequentially overlapped; wherein:

the aperture of the first microporous filter membrane layer is 0.2-1.0 mu m;

the purification adsorption layer adopts any one or more of graphitized carbon, alumina, magnesium silicate, magnesium sulfate and a styrene polymer as a filling material, and the weight of the filling material is 10 mg-500 mg;

the aperture of the second microporous filter membrane layer is 0.2-1.0 mu m;

preferably, the filter screen shell is prepared from polypropylene or high-density polyethylene materials.

Preferably, the first pipe body and the second pipe body are connected with the filter screen shell in an integrated mode.

Preferably, the outer surface of the second pipe body is in a ladder-shaped structure.

Preferably, a radial eave is arranged at the connection position of the first pipe body and the filter disc.

Preferably, a clamping structure is arranged at the edge of the free end port of the first pipe body.

Preferably, a protruding screw is arranged at the edge of the free end port of the first pipe body to form a clamping structure.

Preferably, at least one protruding ring is arranged at the edge of the free end port of the first pipe body to form a clamping structure.

According to another aspect of the present utility model, there is provided a needle filter device for a laboratory, comprising a syringe, and further comprising a needle filter as defined in any one of the preceding claims, wherein the output port of the syringe is tightly mounted on the first tubular body of the needle filter in an operational state.

Preferably, the output port of the injector is provided with a clamping structure adapted to the edge position of the free end port of the first pipe body.

Compared with the prior art, the utility model has at least one of the following beneficial effects:

according to the needle type filtering device and the needle type filter thereof, the needle tube is integrally designed to be gradually tightened from the free port of the first tube body to the free port of the second tube body, so that the structure with a large needle tube input port and a small needle tube output port is formed, and the structure has the characteristics of saving more labor when pushing in solution and being more convenient when collecting filtered solution.

The needle type filter device and the needle type filter thereof provided by the utility model have the advantages that the filter screen shell is prepared from the polypropylene material or the high-density polyethylene, and the protective structure of the polypropylene material or the high-density polyethylene has the characteristics of low content of dissolved matters and wide chemical compatibility.

According to the needle type filter device and the needle type filter thereof, the clamping structure is arranged, so that the needle tube is more compact when being mounted on the injector, and the needle tube is effectively prevented from falling off when the solution is injected.

The needle type filtering device and the needle type filter thereof provided by the utility model are suitable for sample filtration, solvent filtration, filtration of aqueous solution and organic solution and the like before UHPLC, HPLC, LC-MS and mass spectrometry.

Drawings

Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:

fig. 1 is a schematic view showing the overall structure of a needle filter according to a preferred embodiment of the present utility model.

Fig. 2 is a schematic view showing the structure of a filter disc according to a preferred embodiment of the present utility model.

In the figure, 1 is a filter disc, 11 is an inner filter screen, 111 is a filter screen shell, 112 is a first microporous filter membrane layer, 113 is a purification adsorption layer, 114 is a second microporous

filter membrane layer

114, 12 is an outer protective shell, 2 is a needle tube, 21 is a first tube body, 221 is a clamping structure, and 22 is a second tube body.

Detailed Description

The following describes embodiments of the present utility model in detail: the embodiment is implemented on the premise of the technical scheme of the utility model, and detailed implementation modes and specific operation processes are given. It should be noted that variations and modifications can be made by those skilled in the art without departing from the spirit of the utility model, which falls within the scope of the utility model.

An embodiment of the present utility model provides a needle filter, as shown in fig. 1, which includes a filter disc 1 and a needle tube 2 disposed on the filter disc, wherein the filter disc 1 includes an inner filter screen 11 and an outer protective shell 12 disposed on an outer circumference of the inner filter screen; the needle tube 2 comprises a first tube body 21 and a second tube body 22 which are coaxially arranged at the center positions of two end surfaces of the filter disc, and the whole needle tube formed by the first tube body 21 and the second tube body 22 is gradually tightened from a free port of the first tube body 21 to a free port of the second tube body 22; wherein, the free end port of the first tube body 21 is used for connecting with a syringe, and the free end port of the second tube body 22 is used for outputting filtered liquid. In this embodiment, the whole design of needle tubing is tightened gradually from the free port of the first body to the free port of the second body, forming a structure with a large needle tubing input port and a small needle tubing output port, which has the characteristics of saving more effort when pushing in the solution and being more convenient when collecting the filtered solution.

In a preferred embodiment, an equi-planar arrangement between the inner screen 11 and the outer protective shell 12 is effective to prevent tilting of the inner screen 11 inside the outer protective shell 12.

In a preferred embodiment, the inner filter 11 includes a filter housing 111, and a first microporous filter layer 112, a purification adsorption layer 113, and a second microporous filter layer 114 disposed inside the filter housing 111 and sequentially stacked; as shown in fig. 2. Wherein:

the pore size of the first microporous filter membrane layer 112 is 0.2-1.0 μm;

the purification adsorption layer 113 adopts any one or more of graphitized carbon, alumina, magnesium silicate, magnesium sulfate and a styrene polymer as a filling material, and the weight of the filling material is 10 mg-500 mg;

the pore size of the second microporous filter membrane layer 114 is 0.2 to 1.0 μm.

In a preferred embodiment, the filter housing 111 is made of polypropylene material or high density polyethylene. In the embodiment, the filter screen shell is prepared from a polypropylene material or high-density polyethylene, and the protective structure of the polypropylene material or the high-density polyethylene has the characteristics of low content of dissolved matters and wide chemical compatibility.

In a preferred embodiment, the first tube 21 and the second tube 22 are integrally connected with the filter screen shell 111, so that the strength of the filter is improved.

In a preferred embodiment, the outer surface of the second tube 22 is stepped. In this embodiment, the stepped configuration enables a better contact fit between the second tube body and the edge of the smaller bore receiving tube.

In a preferred embodiment, the first pipe 21 is provided with radial flanges at the connection points with the filter disc 1.

In a preferred embodiment, the free end port edge of the first tube 21 is provided with a locking structure 211. In the embodiment, the clamping structure is arranged, so that the needle tube is more tightly arranged on the injector, and the needle tube is effectively prevented from falling off when the solution is injected.

In a preferred embodiment, the edge of the free end port of the first tube 21 is provided with a protruding screw to form a locking structure.

In a preferred embodiment, at least one protruding ring is provided at the edge of the free end port of the first tube 21 to form a snap-fit structure.

An embodiment of the present utility model provides a needle filter device for a laboratory, including a syringe, and further including the needle filter according to any one of the above embodiments of the present utility model, wherein in an operating state, an output port of the syringe is tightly mounted on a first tube of the needle filter.

In a preferred embodiment, the output port of the injector is provided with a clamping structure adapted to the edge position of the free end port of the first tube body, and the clamping structure effectively prevents the needle tube from falling off when injecting the solution.

In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the simplified description of the present utility model, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus are not to be construed as limiting the present utility model.

The foregoing embodiments of the present utility model are not all well known in the art.

The foregoing describes specific embodiments of the present utility model. It is to be understood that the utility model is not limited to the particular embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the claims without affecting the spirit of the utility model.

Claims

1. The needle filter comprises a filter disc and a needle tube arranged on the filter disc, and is characterized in that the filter disc comprises an inner filter screen and an outer protective shell arranged on the outer circumference of the inner filter screen; the needle tube comprises a first tube body and a second tube body which are coaxially arranged at the central positions of two end surfaces of the filter disc, and the whole needle tube formed by the first tube body and the second tube body is gradually tightened from a free port of the first tube body to a free port of the second tube body; the free end port of the first pipe body is used for being connected with a syringe, and the free end port of the second pipe body is used for outputting filtered liquid.

2. The needle filter of claim 1, wherein the inner filter mesh and the outer protective shell are equi-planar.

3. The needle filter of claim 1, wherein the inner filter screen comprises a filter screen shell, and a first microporous filter membrane layer, a purification adsorption layer and a second microporous filter membrane layer which are arranged inside the filter screen shell and are sequentially overlapped; wherein:

the aperture of the first microporous filter membrane layer is 0.2-1.0 mu m;

the aperture of the second microporous filter membrane layer is 0.2-1.0 mu m;

the filter screen shell is prepared from polypropylene or high-density polyethylene materials.

4. A needle filter as claimed in claim 3, wherein the first and second tubes are integrally connected to the filter screen housing.

5. The needle filter of claim 1, wherein the outer surface of the second tube body has a stepped configuration.

6. The needle filter of claim 1, wherein the first tube body is provided with a radial ledge at a location where the first tube body is connected to the filter disc.

7. The needle filter of any one of claims 1-6, wherein the free end port edge location of the first tube body is provided with a snap-fit feature.

8. The needle filter of claim 7, wherein the free end port edge of the first tube body is provided with a raised screw to form a snap-fit structure; or (b)

At least one protruding ring is arranged at the edge of the free end port of the first pipe body to form a clamping structure.

9. A needle filter device comprising a syringe and a needle filter as claimed in any one of claims 1 to 8, wherein the output port of the syringe is mounted in close proximity to the first tubular body of the needle filter in an operational state.

10. The needle filter device of claim 9, wherein the output port of the syringe is provided with a snap fit arrangement adapted to the position of the free end port edge of the first tube.