CN103432795B - Syringe needle filter and upper cover thereof - Google Patents

Abstract

The invention discloses a needle filter and its upper cover. The upper cover includes an upper cover disc body and an input pipe part arranged in the center of the upper cover disc body. The connection between the input pipe part and the upper cover disc body is provided with A plurality of struts A, the plurality of struts A extend radially along the pipe hole of the input pipe part and converge and connect at the center, and the inner wall of the upper cover plate is formed with a plurality of arc-shaped protrusions A, circular Arc groove A and radial groove A, the plurality of arc-shaped protrusions A are concentrically distributed with the tube hole of the input pipe part as the center, and the space between two adjacent arc-shaped protrusions A is The circular arc grooves A communicate with each other through radial grooves A, and the multiple radial grooves A communicate with the pipe holes of the input pipe part and are distributed radially. The technical scheme makes the filter membrane not easily damaged, the filter not easily blocked, and the filter speed stable and fast.

Description

Syringe filter and its upper cover

technical field

The invention relates to a needle filter, in particular to an upper cover of the needle filter.

Background technique

Membrane separation technology is known as "one of the most promising high-tech in the middle of the 21st century", among which the application of microporous membrane separation in the fields of biology, chemical analysis and pharmaceuticals is the most eye-catching, without the need to change membranes and clean filters , which saves complex and time-consuming preparations and is widely used in laboratories. Syringe filter has simple and reasonable structure, low cost, good filtering effect and strong universal applicability. It can be used as a fast, convenient and reliable filter treatment device for small-volume samples for routine use in laboratories, and is widely used for pre-filtration of samples. And in the sterilization and filtration operation of laboratory biological fluids, culture media and media additives. For example, the patent document whose publication number is CN201988247U discloses a syringe filter, which includes an upper body, a lower body connected to the upper body, and a filter membrane between the upper body and the lower body. The connection forms a cavity with an inlet and an outlet, and the filter membrane separates the cavity into upper and lower parts, and the outer periphery of the fastening position of the upper body and the lower body is covered with a covering ring.

However, the existing syringe filter structure has problems such as that the filter membrane is easily damaged, and the filtered impurities and foreign matter are easy to accumulate locally.

Contents of the invention

In order to solve the above-mentioned technical problems, the purpose of the present invention is to provide a syringe filter and its upper cover. A flow-distributing support structure is provided at the entrance of the upper cover, thereby avoiding the easy damage of the filter membrane at this place. The diversion structure disperses and filters out impurities and foreign matter, and stabilizes the filtration speed.

In order to achieve the above-mentioned purpose, the present invention has adopted following technical scheme:

The upper cover of the syringe filter includes an upper cover disc body and an input pipe part arranged in the center of the upper cover disc body. A plurality of struts A are arranged at the connection between the input pipe part and the upper cover disc body. The two struts A extend radially along the tube hole of the input pipe part and are converged and connected at the center. A plurality of arc-shaped protrusions A, arc-shaped grooves A and radial grooves A are formed on the inner wall of the upper cover body. , the plurality of arc-shaped protrusions A are concentrically distributed with the tube hole of the input pipe part as the center, and there is an arc groove A between the inner and outer adjacent two arc-shaped protrusions A, and the plurality of arcs The grooves A communicate with each other through radial grooves A, and a plurality of radial grooves A communicate with the tube hole of the input tube part and are distributed radially.

Preferably, the upper part of the input pipe part is provided with spiral corrugations for connection.

As a preference, the struts A and the radial grooves A are misaligned.

Preferably, four struts A are evenly distributed at the connection between the tube hole of the input pipe part and the cavity, and eight radial grooves A are evenly distributed on the inner wall of the cavity of the upper cover plate.

Preferably, the pipe hole of the output pipe part is a tapered hole with a large upper and a lower taper of 1° to 5°.

Syringe filter including cap as above.

Since the present invention adopts the above technical scheme, a plurality of struts are arranged at the entrance of the upper cover to form a shunt support structure, so as to avoid impact and damage to the filter membrane here when the fluid pressure is too large, and at the same time, the inner wall of the upper cover is distributed. The diversion structure composed of multiple arc-shaped protrusions, arc-shaped grooves and radial grooves can disperse and filter out impurities and foreign substances, avoid clogging by impurities and foreign substances, and ensure a stable and fast filtration speed.

Description of drawings

Fig. 1 is the structural representation of syringe filter of the present invention;

Fig. 2 is the structural representation of loam cake;

Fig. 3 is the A-A sectional view of Fig. 2;

Fig. 4 is the structural representation of lower cover;

Fig. 5 is a B-B sectional view of Fig. 4 .

Detailed ways

The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings.

Example 1:

A kind of syringe filter as shown in Figure 1, comprises upper cover 1, lower cover 2, filter membrane 3 and cladding ring 4, and upper cover 1 comprises upper cover disk body 16 and the input that is arranged on the upper cover disk body 16 center The pipe portion 17, the lower cover 2 includes a lower cover plate body 26 and an output pipe portion 27 arranged at the center of the lower cover plate body 26, and the upper cover plate body 16 and the lower cover plate body 26 are connected up and down to form an accommodation between the two. The cavity of the filter membrane 3, the filter membrane 3 edge is clamped and fixed by the upper cover disc body 16 and the lower cover disc body 26 so that the cavity is divided into upper and lower parts, the upper cover disc body 16 and the lower cover disc body 26 The outer periphery is covered with a cladding ring 4 , the tube hole 11 of the input tube part 17 communicates with the upper part of the cavity, and the tube hole 21 of the output tube part 27 communicates with the lower part of the cavity.

As shown in Fig. 2 and Fig. 3, a plurality of struts A14 are provided at the connection between the tube hole 11 of the input tube part 17 and the cavity, and the plurality of struts A14 are arranged along the tube hole of the input tube part 17. 11 radially extending and converging at the center, the upper cover disc body 16 is formed with a plurality of arc-shaped protrusions A12, arc-shaped grooves A13 and radial grooves A15 on the inner wall of the cavity. A plurality of arc-shaped protrusions A12 are concentrically distributed with the tube hole 11 of the input pipe part 17 as the center. There is an arc groove A13 between two adjacent arc-shaped protrusions A12 inside and outside. The A13s communicate with each other through radial grooves A15, and a plurality of radial grooves A15 communicate with the pipe hole 11 of the input pipe part 17 and are distributed radially.

As shown in Fig. 4 and Fig. 5, a plurality of struts B24 are provided at the connection between the tube hole 21 of the output tube part 27 and the cavity, and the plurality of struts B24 are arranged along the tube hole of the output tube part 27. 21 radially extending and converging at the center, the lower cover body 26 is formed with a plurality of arc-shaped protrusions B22, arc-shaped grooves B23 and radial grooves B25 on the inner wall of the cavity. A plurality of arc-shaped protrusions B22 are concentrically distributed with the tube hole 21 of the output pipe part 27 as the center, and an arc-shaped groove B23 is formed between two adjacent arc-shaped protrusions B22 inside and outside, and a plurality of arc-shaped grooves The B23 communicates with each other through radial grooves B25, and a plurality of radial grooves B25 communicates with the pipe hole 21 of the output pipe part 27 and is distributed radially.

In this embodiment, the upper part of the input pipe part 17 is provided with a spiral rib 18 for connection. The struts A14 and the radial grooves A15 are misaligned. The struts B24 and the radial grooves B25 are misaligned. Four struts A14 are evenly distributed at the connection between the pipe hole 11 of the input pipe part 17 and the cavity, and eight radial grooves A15 are evenly distributed on the inner wall of the cavity of the upper cover body 16 . Four struts B24 are evenly distributed at the connection between the pipe hole 21 of the output pipe part 27 and the cavity, and eight radial grooves B25 are evenly distributed on the inner wall of the cavity of the lower cover body 26 . The pipe hole 21 of the output pipe part 27 is a tapered hole with a large upper and a lower taper of 1°-5°. The pipe hole 11 of the inlet pipe part 17 is larger than the pipe hole 21 of the outlet pipe part 27 .

It should be emphasized that: the above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are valid. Still belong to the scope of the technical solution of the present invention.

Claims (6)

1. The upper cover of the syringe filter, including the upper cover disc body (16) and the input tube part (17) arranged in the center of the upper cover disc body (16), characterized in that the input tube part (17) is connected with the upper cover disc body (16) A plurality of struts A (14) are provided at the junction of the cover body (16), and the plurality of struts A (14) extend radially along the pipe hole (11) of the input pipe part (17) and in the center converging connection, the upper cover body (16) is formed with a plurality of arc-shaped protrusions A (12), arc-shaped grooves A (13) and radial grooves A (15) on the inner wall. The first arc-shaped protrusions A (12) are concentrically distributed with the pipe hole (11) of the input pipe part (17) as the center, and the two adjacent arc-shaped protrusions A (12) inside and outside are arc grooves Groove A (13), a plurality of circular arc grooves A (13) are connected through radial grooves A (15), and a plurality of radial grooves A (15) are connected to the input pipe part (17) Tube holes (11) are distributed radially. 2. The upper cover of the syringe filter according to claim 1, characterized in that, the upper part of the input pipe part (17) is provided with a spiral rib (18) for connection. 3. The upper cover of the syringe filter according to claim 1, characterized in that, the struts A (14) and the radial grooves A (15) are misaligned. 4. The upper cover of the syringe filter according to claim 1, characterized in that four struts A ( 14), the upper cover body (16) evenly distributes eight radial grooves A (15) on the inner wall of the cavity. 5. The upper cover of the syringe filter according to claim 1, characterized in that the pipe hole (21) of the output pipe part (27) is a tapered hole with a large upper and a lower taper of 1° to 5° . 6. A syringe filter, characterized by comprising the upper cover according to any one of claims 1-5.