Throat tube-type airflow drafting device for preparing high-thermal-insulation and flame-retardant material with velvet-like structure

Abstract

The invention discloses a throat tube-type airflow drafting device for preparing a high-thermal-insulation and flame-retardant material with a velvet-like structure. The device comprises an upper sleeve, the bottom end of the upper sleeve is connected with a lower sleeve through threads, a lower plug is arranged in the bottom of the upper sleeve, a central tube is arranged in the upper sleeve, thebottom end of the central tube is fixed in the lower plug through a fixing cap, the upper end of the upper sleeve is connected with a drafting cap through threads, a gasket is arranged between the drafting cap and the upper sleeve, the lower end of the drafting cap is composed of an arc-shaped structure and a straight tube structure, the upper end of the central tube is of a trumpet-shaped structure with an upward opening, the straight tube structure and the partial arc-shaped structure are inserted into the central tube, a gap area is formed at the lower end of the drafting cap and the upperend of the central tube, and the inner diameter of the straight tube structure is one third of the inner diameter of the lower end of the trumpet-shaped structure. The drafting device overcomes the defects of the prior art, the size of the gap area of the drafting device is adjustable, airflow enters the central tube from the gap area, and the influence of vortex on tows is eliminated through three-time transition.

Description

technical field [0001] The invention relates to the technical field of airflow drafters, in particular to a throat-type airflow drafter for the preparation of goose-down structure high-heat-retaining flame-retardant materials. Background technique [0002] The airflow drafter is an important equipment in the spinning fiber production process. The tubular airflow drafter passes through the gap formed between the drafting cap and the central tube, and is driven by the high-pressure airflow to draft the tow through negative pressure. However, in the gap region, due to the sudden enlargement of the space area through which the air flow passes, gas eddies that affect the tow will be generated. [0003] In view of the above shortcomings, in the prior art, this phenomenon is improved by setting a transition tube in the center tube, but the size of the gap formed between the drafting cap and the center tube cannot be adjusted. In addition, the goose down-like high-heat-retaining fl...

AI Technical Summary

Problems solved by technology

[0002] The airflow drafter is an important equipment in the spinning fiber production process. The tubular airflow drafter passes through the gap formed between the drafting cap and the central tube, and is driven by the high-pressure airflow to draft the tow through negative pressure. However, in the gap area, due to the sudden increase of the space area through which the air flow passes, a gas vortex that affects the tow will be generated.

[0003] In view of the above shortcomings, this phenomenon has been improved by setting a transition tube in the center tube in the prior art, but the size of the gap formed between the draft cap and the center tube cannot be adjusted

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