US1860347A - Torch device - Google Patents

Description

.1. J. cRow'E' TORCH DEVICE May 31,- 1932 Filed Dec. 16, 1929 2 Sheets-Sheet l i INVENTOR,

A TORNEY- J. J. CROWE May 31, 1932.

TORCH DEVICE Filed Dec. 16. 1929 2 Sheets-Sheet 2 H s 4 H lllll fl ZINVENTOR AT ORNEY Patented May 31; 1932' UNITED "STATES PATENT OFFICE JOHN J. CROWE, OF WESTFIELD, NEW JERSEY, ASSIGNORQO AIR REDUCTION COMPANY, INCORPORATED, OF NEW YORK, N. Y.',' A CORPORATION OF NEW YORK 'roncn DEVICE Application filed December 16, 1929. Serial No. 414,436.

The tips of cutting torches used for severing metal are designed to deliver a high velocity stream of oxygen. In my copending application Serial No. 411,239, filed December 3, 1929, I have disclosed a tip and a method of cutting wherein narrower kerfs and greater efliciency are secured by delivering the cutting stream through an orifice the divergence of which is such as to translate substantially all the pressure of the gas into kinetic energy. Thereby the velocity of the issuing stream is greatly increased and its width is reduced, because it spreads littl or not at all on leaving the tip.

The Walker Patent 1,726,327 of August 27, 1929, discloses a torch tip having a flaring exit but adapted for atotally different kind of operation, calling for a broad, spreading I stream of oxygen of lowered velocity. The present invention relates to torchtips of that class, the object being to insure the delivery of an exceptionally wide stream. The uses.

of such a tip include the gouging out of defects in billets and blooms and the burning away of rivet heads. For the latter purpose the broad stream is applied directly to the face of the rivet head, preheated by the familiar heating jets, with the result that part or all of the head is quickly consumed without injury to the plate beneath.

In this invention I make use of a large oxygen passage provided with a flaring downstream portion adapted to deliver a large oxygen stream, as in the Walker patent, but in order to compel the stream to fill the flaring exit and to spread even more widely a device is inserted in the oxygen passage behind the flare or within the flare itself. This device, which may take several forms, may have a passage which delivers a central portion of the flow substantially undeflected and therefore at higher velocity .than the surrounding',portion of the stream. In the accompanying drawings, forming part hereof: Fig. 1 is a a torch head and of a tip therein embodying one form of the invention; 7/ Q Fig. 2 is an enlarged side elevation of the twisted blade device shown in Fig. 1;

- gen stream is delivered from amuch enlarged longitudinal section of part of Fig. 3 is a fragmentary longitudinal section of a torch tip in which vanes having twisted tips are employed for producing a vwhirling motion of the-oxygen and causing consisting of a plug having passages drilled to direct the oxygen into the flaring chamber in tangential diagonal directions;

Fig. 7 is an enlarged side elevation of the device shown in Fig. 6; I

Fig. 8 is a plan view of Fig. 7 Fig. 9 is a view like Fig. 3 showing a pro peller form device'supported in the narrower portion of the flare; Fig. 10 is a view like Fig; 3, the deflecting device employed being a body supported in the flaring exit; v

Fig. 11 is a similar view, showing the deflector provided with a central through passage;

Fig. 12 is an enlarged longitudinal section of the device shown in Fig. 11; and v Fig. 13 is a fragmentary longitudinal section of a tip containing a device like that shown in Figs. 10 12, but having a central longitudinal passage terminating in inclined exits.

The tips, which are marked 2 in the several views, have large central oxygen passages 3, the, downstream portions 4 of which are broadened in a decided flare, so that the oxyround opening in theextremity of the tip. The tips have usual preheating jet passages 5, which may be provided at the rear end of the tip with inlets 6 and 7 for oxygen and fuel gas, respectively. The tip is adapted to be inserted in a cutting torch head 8 having supply'passages 9, 10 and 11 for cutting, oxygen, heating oxygen. and fuelgas, re-

spectively.

In Fig. 1 a twisted strip of metal 12: is inserted firmly into the passage 3 just behind the flaring portion 4 and projecting into that portion. This device deflects the oxygen stream, causing it to whirl and spread out 100 evenly in the flaring exit, so that the mouth is filled by the-stream. The stream which issues from the tip is consequently as wide as the delivery opening and tends to spread even more widely.

In Fig. 3 a four-winged vane device 12 is introduced into the oxygen passage at the narrow end of the flare, the tips of the vanes being twisted to produce an effect similar to that ust described.

In Fig. 6, the means for directing the oxygen outward to the wall of the flaring exit is a plug l2 having diagonal passages 13 drilled in planes that may be described as tangential, in order to impart a whirling or lateral motion to the oxygen on entering the flare.

In Fig. 9 a propeller like device 12 is supported within the flaring exit by a stem 14 held in spiders 15. This device may be either stationary or rotary.

I In Fig. 10 a pear-shaped body 12 on the end of a stem 16 is supported from spiders 15; This body is disposed within the narrow end of the flare andserves to deflect the oxygen flowing around it outward to the wall of theflare. Devices of other shapes and sizes for spreading the oxygen stream may be employed, and their location is not confined to the narrow end ofthe flaring exit.

In Fig. 11 the body 12 and its stem have a straight central passage 17 for conducting a central portion of the stream and delivering it in the axial direction within the flare. In this way the broad stream of oxygen discharged from the tip may bevcaused to have surrounding gas.

' In Fig. 13, a similar form of a device 12 has a central passage 17 which branches into a plurality of inclined exits'18 opening through the sides of the bulbous body. By varying 'the direction of these exits the spreading effect can be made more or less pronounced. and varying degrees of turbulence can be produced.

Other forms of the invention will suggest themselves.

I claim:

1. A torch device of the character described having an oxygen passage provided with an enlarged downstream portion terminating in a large-o ening from which-the oxygen stream is dellvere'd into the atmosphere, and

means for directing the oxygenoutwardin saidzenlarged portion in order to insure a w1de issulni stream. s j J -2'. torch deviceof the character described having'an oxygen'passage provided with a v at the reglon 0 said flaring p the oxygen outward to the wall of said p01-,

tion in order to insure a wide issuing stream.

. flaring downstream portion alargeo enin and means in said passage tirminating in tion to direct 3 A torch device of the character described havlng an oxygen passage provided with a flaring downstream portion terminating in a large opening, and means in said passage at the region of said flaring portion to impart a swirling motion to the oxygen.

4. 'A torch device of the character described having an oxygen passage provided with a flaring downstream portion terminating in a large opening, and a twisted member in said passage at the region of said flaring portion.

5. A torch device of the character described structed to direct the oxygen outward to the.

wall of said portion and also having a channel for directing a central part of the flow into said flaring portion substantially without deflection.

7. A torch device of the character described having an oxygen passage provided with aflaring downstream portion terminating in a large opening, and a device in said passage at the region of said flaring portion constructed to direct the oxygen in part outward to the wall of said portion and to deliver a central a core traveling at higher velocity" than the portion of the stream in amore forward di;

rection.

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