Safety with exhaust channelfunnel。The utility model belongs to the technical field of funnel.A safety funnel with an exhaust channel is composed of a funnel body and a funnel tube just like an ordinary funnel, which is special in that at least one structure is arranged on the outside of the funnel body and the funnel tube, which can form an exhaust channel with the circular inlet of the receiving container.
brief introduction
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The structure that can form an exhaust channel with the circular inlet of the receiving container means that the cross section shape of the funnel body and funnel tube is polygon;The cross section shape of the outside surface of the funnel body and funnel tube is polygon;It also means that the funnel body and the outside of the funnel tube are provided with grooves or depressions.The above structure shall run through the outside of the funnel tube along the funnel tube, and at least run through the outside of the funnel body near the funnel tube.The utility model has reasonable design, ingenious conception, simple structure and easy implementation.The safety funnel is composed of a funnel body and a funnel tube, which is characterized in that at least one structure is arranged on the outside of the funnel body (1) and the funnel tube (5), which can form an exhaust channel (6) with the circular inlet (4) of the receiving container.
filter
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It refers to selecting the qualified part from the existing batch of substances and removing the unqualified part. The sewage is filtered after sedimentation treatment.Experimental equipment: iron frame, iron ring, glass funnel, glass rod, two beakers, filter paper, sewage.Experiment operation: connect the device according to the figure, place the glass rod against the side of the three-layer filter paper, fill a beaker with sewage, place the beaker against the middle and lower part of the glass rod to pour sewage, pay attention to that there is no bubble between the filter paper and the glass funnel, if there is bubble, use the glass rod to gently drive away the bubble.Do not break the filter paper, or the sewage will flow down from the broken part when filtering, which will not play the role of filtering.Also, do not make the sewage higher than the edge of the filter paper.If the filtered water is still turbid, it should be filtered again. If it is still turbid, check whether the filter paper has bubbles or is broken.
