SU15667A1 - Metal boat for drawing sheet glass - Google Patents

Description

metal boats for pulling sheet

To patent V.E. Bromle, asserted on October 20, 1927 (for Article See Certificate No. 20264).

On granting a patent published June 30, 1929. Patent action; distributed for 15 years from June 30, 1929.

The present invention relates to a boat device for drawing sheet glass from molten glass mass and is intended to eliminate heating heterogeneity and the associated installation disorder. To accomplish this goal, in the proposed metal boat, on both sides of the exhaust slit, in the thickness of the boat, are installed along a thick-walled pipe into which double-walled pipes are inserted, which serve to circulate cold water. The outer surface of the outer pipe along the entire length of it is supplied with T-shaped grooves, on which the internal sectors facing the exhaust slit with cooling pipes running through them are fixed; external insulating sector with chrome spirals, which serve to warm the outside of the boat, and insulated strips with cooling tubes and with set screws designed to hold the groups of the above sectors against each other. In addition, thermocouple wires are laid in the inner double-wall pipe.

glass

In the schematic drawing of FIG. 1 shows a cross-section of the boat; FIG. 2 is a top view and a partial horizontal section; and FIG. 3 perspective view of her.

Boat, mounted on a rigid, cooled frame insulated in its thickness, formed from two parallel steel thick-walled pipes A installed on each side of the exhaust slot, inserted with conical ends into the sleeves B and tightened with nuts C. The double-walled pipes D embedded in pipes A cool the frame due to the circulation of cold water through them supplied and discharged through the crane couplings E (Fig. 1 and 3). The HT-shaped grooves, milled along the length of the tubes A, are reinforced (pushed in) the external sectors F, F ..,. from fire-resistant non-oxidized material, cooled to varying degrees by tubes d, d (Fig. 1 and 2), coming out at the ends of the device in groups J, J (Figs 1, 2 and 3). The outer insulating sector H (Figs. 1 and 3), ° also installed in the T-shaped grooves of the pipe L, consists of a fire-resistant metal box lined with an insulating lining. The outer shell of this sector is heated from the inside by electric current with the help of nichrome spirals K. embedded in the insulating lining (Figs. 1 and 2). Group of sectors F, F. . . pressed against sector H with insulated strips L, L, installed with screws X, X and cooled pipes M, M. The ends of sectors F, F. . . . and H, the pipes -D and the sleeve -B are enclosed in a metal case O, filled with an insulating material.

Thermocouple wires are laid in pipes D, passing through channels N in the walls of pipes -4 and D and ending at the external surfaces of sectors F to H, as well as passing through the outer shell of the boat (Fig. 1).

In the case of continuous circulation of water through pipes D and pipes M of the slat L, the boat is placed above the glass of the aircraft chamber. The gap Q and the lip Z (Fig. 1) are heated by the flame of a long tubular gas burner introduced under the boat. Expanding from the heating, the sectors move in the guiding grooves of the tubes A. When the wetting temperature of the metal with glass is reached, the burner is removed, the boat is immersed in the glass mass and the process of drawing the glass strip begins. Thermocouples controlled by the optimum temperature of the surface of the slit Q, the lip Z and the glass flowing around the boat are controlled by the combined action of the nichrome spirals / C of the sector H and the various layers of cooling tubes G switched

three-way taps for water supply or

compressed air.

The subject of the patent.

1. A metal boat for drawing sheet glass from the molten mass, characterized in that, in order to eliminate non-uniform heating and the associated installation disorder, in the thickness of the boat on both sides of the exhaust slot, a thick-walled tube A, fitted from the inside with a double wall, is installed in the thickness of the boat pipe D with a crane coupling E for supplying and discharging water, and outside the T-shaped longitudinal grooves serving to install and strengthen the following accessories: a) facing the exhaust slits of the internal sectors L, F, F. . . with fire-resistant, non-oxidizing material with cooling pipes G passed through each sector and brought to both ends of the device by groups 7, b) an external insulating sector H equipped with nichrome spirals embedded in the insulating lining (serving to warm the outside of the boat and a) equipped with cooling tubes M of insulated strips L with set screws X serving to press the groups of the above sectors against each other.

2. In the boat mentioned in paragraph 1, the use of channels N in the walls of pipes A and D, terminating at the external surfaces of the FVI sectors is also passed through the outer shell of the boat used for the installation of thermocouples whose wires are laid inside the pipes 7).

to patent c. E. Bromle number 15667

FSH and

l

FIG. 2

U a