Novel funnel

Abstract

The invention belongs to experimental instruments, and particularly relates to a novel funnel, which comprises a funnel body and a funnel neck. The lower end of the funnel body is communicated with the upper end of the funnel neck, and the inner wall of the funnel body is provided with a guide groove from top to bottom. The funnel neck is a polygonal tubular neck or a cylindrical tubular neck, the funnel body is in an inverted pyramidal shape or an inverted conic shape, the wall of the funnel body is a waved wall, and the square cross section of the guide groove which is arranged on the inner wall of the funnel body from top to bottom can be rectangular, semicircular or triangular. The inner wall of the funnel body is provided with protruding points, and the pyramid is an inverted triangular pyramid, inverted pyramid or inverted pentagonal pyramid. The funnel body is in an inverted pyramidal shape or an inverted conic shape. Compared with the prior art, the novel funnel has the advantages that the funnel is simple in structure, quick in filtering and convenient in use, and experimental efficiency can be improved.

Description

technical field [0001] The invention belongs to experimental instruments, in particular to a novel funnel. Background technique [0002] The funnels used in the laboratory are all inverted conical. During the experiment, the round filter paper must be folded into an inverted conical shape that matches the size of the funnel, and then put into the funnel for filtration; sometimes it is necessary to soak the filter paper with distilled water to make the filter paper adhere to the inner wall of the funnel before filtering. Because the filter paper is completely close to the inner wall of the funnel, due to the influence of the upper and lower air pressure of the funnel and the obstruction of the inner wall of the funnel, the filtrate seeps slowly and the filtration speed is very slow. It often takes more than ten or even tens of minutes to complete the filtration step in the experiment. However, general experimental teaching courses are often only tens of minutes long, so it o...

AI Technical Summary

Problems solved by technology

Because the filter paper is completely close to the inner wall of the funnel, due to the influence of the upper and lower air pressure of the funnel and the obstruction of the inner wall of the funnel, the filtrate seeps slowly and the filtration speed is very slow. It often takes more than ten or even tens of minutes to complete the filtration steps in the experiment.

However, general experimental teaching courses are often only tens of minutes long, so it often happens that the teaching experiment cannot be completed on time due to too much time wasted in the filtering process.

Images