McLain's system of reading working drawings or blue prints by McLain David

Author:McLain, David. [from old catalog]
Language: eng
Format: epub, pdf
Tags: Mechanical drawing, Blueprints
Publisher: Milwaukee, Wis., McLain's system, inc.
Published: 1921-03-25T05:00:00+00:00

Bore Rad. or R. • Spot Face

Dia. Drill C. Boi^^

^ Center line (note construction) Section AAA

fJc,-106

Vl^

BEEHIVE COKE OVEN.

Fig. 106 is a working drawing of a beehive coke oven and is used for the manufacture of foundry and blast furnace coke. It is built entirely of refractory brick. The relative position of the views of this oven is exactly the same as that of any other object previously explained. A doorway is shown at the left and a circular tapered opening thru the roof. The general outline of the oven is similar to a dome.

By referring to the top view you will note that one-half of this view shows the exterior of the roof when looking directly down oh top of it. The lower right hand quarter of the top view indicates a cross sectional view taken along the line BB and the lower left hand of the top view indicates the cross sectional view taken along the line AA, looking down. A longitudinal cross sectional view is shown and marked section CC, the section being taken along the line CC (see top view). A half view of the doorway looking out from the interior is shown at the right.

Cross sectional views of this oven are obtained in exactly the same manner as previously explained. It must be remembered that the surfaces which have been cut with the imaginary saw along the lines as mentioned are crosshatched. The section lines AA and BB indicate the position or location of the horizontal cut and the section lines CC on top view indicate the position or location of vertical cut thru the oven.

OPERATION OF BEEHIVE COKE OVEN.

Beehive coke ovens are used to manufacture foundry and blast furnace coke. The dimensions are from 7 to 12 feet in diameter, vertical wall 2% feet high and the roof almost hemispherical. These ovens are generally arranged in batteries of 20, 30 or more, being placed one alongside the other, with the doorways all on the same side.

A retaining wall is built the full length of the battery along the door side and up to the top of oven. Earth is then used to cover the entire oven, allowing only the top of the upper opening to project. A railroad track is placed about 6 or 7 feet to the right of this opening, running parallel with the ovens. On this track coal is conveyed from the screens or washery to the openings of the ovens. The largest size ovens are capable of holding a charge of about 5 ton which is introduced thru the opening at the top and is leveled off to a height of about 2V2 feet.

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