Vacuum filtering device

Abstract

The invention relates to a vacuum filtering device. The vacuum filtering device comprises a filtering cup and a filtrate bottle, and further comprises a clamp ring and a filtering main body, wherein the clamp ring comprises a circular ring and clamp ring arms and is used for fixing the filtering main body and the filtering cup; the filtering main body comprises a body, a filtering film supporting member and a filtration joint; the upper bottom surface of the body is provided with a first groove; the interior of the first groove is provided with a first blocking part; the upper part of the side surface of the body is provided with a first outer screw thread matching with a first inner screw thread; the lower bottom surface of the body is provided with a second groove which is connected with the filtrate bottle; the interior of the body is also provided with a filtrate channel and a gas channel; the first groove communicates with the second groove through the filtrate channel; the second groove communicates with the exterior of the filtering main body through the gas channel; the filtering film supporting member is arranged on the first blocking part; and the filtration joint is arranged on the gas channel and extends out of the body. The vacuum filtering device provided by the invention has the advantages of simple structure, firmness, durability, use convenience, cleaning easiness, etc.

Description

technical field [0001] The invention relates to the field of solvent filtration, in particular to a vacuum filter device whose filter body adopts polytetrafluoroethylene material. Background technique [0002] In experiments such as liquid chromatography analysis, gravimetric analysis, microanalysis, separation and purification, vacuum filtration devices are often used to quickly filter and degas the solution. At present, the vacuum filtration devices commonly used in laboratories are made of glass, including glass filter cups, sand core filter heads, triangular liquid collection bottles and metal clips, but there are the following problems: [0003] 1. The device is made of glass material, which is easy to break; [0004] 2. The sand core is usually quartz sand, which is easy to break, cannot be replaced, and is difficult to clean. When different solvents need to be filtered, in order to avoid cross-contamination, multiple sets of devices need to be prepared, which is cost...

AI Technical Summary

Problems solved by technology

[0003] 1. The device is made of glass material, which is easy to break;

[0004] 2. The sand core is usually quartz sand, which is easy to break, cannot be replaced, and is difficult to clean. When different solvents need to be filtered, in order to avoid cross-contamination, multiple sets of devices need to be prepared, which is costly;

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