DESCRIPTION

TECHNICAL FIELD

The invention describes the Concept Design of dust extraction chamber for extracting Silicon dust /powder generated during Hard Lagging process at LCA Tejas Project.

BACKGROUND OF INVENTION

Light Combat Aircraft (LCA) consists of Pipe assemblies which are wrapped with heat insulation material called Silicon fabric sheet. During the Process of Cutting & Wrapping Sheet over Pipes/Ducts fine dust (silica powder) is generated which is hazardous for the operator working in such environment, this leads to problem like breathing, skin allergies and cancer.

Conventional method of hard lagging process had problems as below,

a) Extraction of dust generated during process was carried by two vacuum cleaners with low efficiency.

b) Continuously working in such environment was difficult and involved lot of safety precaution.

c) Safety precaution used to be adapted to all the personal entering that environment.

d) Cycle time involved in such assembly was high.

SUMMARY OF INVENTION

Concept Design of Dust extraction system with built in fume cabinet made from Fiber Reinforced Fabric and fume hood table with high pressure exhaust. This extraction system allows silicon dust to be collected in separate disposable pan below the extractor using the suction pressure generated during the process.

PROCESS DETAIL DESCRIPTION

Newly evolved method to achieve the objective of dust extraction system efficiently and effectively as follows:

A Dust/Fume Cubical chamber with aluminum frame work fitted with gypsum sheet and top blower fan was designed with Air leak proof chamber and Clear glass to view inside activity. Working table with slant height for efficient suction of dust with removable type Stainless steel mesh which serve as the base for working. Inlet extraction duct connected to the bottom side of the slanted table for extracting all accumulated dust efficiently. Out let of duct is covered with very fine filter clothing to avoid the mixing of silicon powder with atmosphere. It further disposes the dust in the pan provided at the bottom. This Duct Extraction system is designed with proper ergonomics taking safety norms into consideration.

DRAWINGS

Fig.l: Picture of dust extraction system

Fig. 2: Drawing of Duct Extraction system

Fig.3: Picture of silicon fabric sheet with cut pieces.

Fig.4: picture of final finished Pipe Assy

CLAIMS

We claim the Design concept of Dust Extraction Chamber to collect and safe disposal of Hazardous Silicon Power dust