Dropping funnel for solid dangerous goods burning speed test

Abstract

The invention discloses a dropping funnel for a solid dangerous goods burning speed test; the dropping funnel is composed of a supporting foot stand, an inverted pyramid type liquid collecting tank and sighting bars; a tower tip of the inverted pyramid type liquid collecting tank consists of four prisms and is connected with a guide post; the tower bottom of the inverted pyramid type liquid collecting tank is fixedly connected with the supporting foot stand; two sighting bars are fixed at the side edges of the tower bottom, and the bottom ends of the sighting bars are tips; the tip of the guide post is located at a connection line of the tips of the two sighting bars. The funnel can ensure that a wetting agent is accurately dropped to a stacked ridge of a measured substance according to test requirements, a strong guarantee is provided for implementation of the United Nations dangerous goods flammable solid burning speed test strictly according to requirements; the funnel is simple in structure, low in cost and capable of direct production through 3D printing.

Description

technical field [0001] The invention relates to an experimental device, in particular to a dropping funnel used for the burning rate test of solid dangerous goods. Background technique [0002] Section 33 of Part III of the United Nations Recommendations on the Transport of Dangerous Goods Manual of Experiments and Criteria specifies the test method for the classification of flammable solids, which requires the determination of the packing category of flammable solids (except metal powder) through flame retardancy tests . In the flame retardant test, it is required to accurately drop 1 ml of wetting agent on the ridge of the stacked object to be tested. The area should be as small as possible to prevent loss from both sides of the stack and ensure that the cross-section of the stacked material is completely wet. Ignite the stacked mass and observe whether the wetted segment prevents the flame from propagating for more than 4 minutes. For stacking of easily combustible soli...

AI Technical Summary

Problems solved by technology

The way of manual operation is quite random, and it often occurs that due to inaccurate positioning, it does not drop accurately on the ridge of the test substance stack, several drops do not drop at the same position, or the wetting agent drops form on the test substance stack. If the area is too large, the accuracy and reproducibility of the experiment are poor, which cannot meet the requirements of the experiment.

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