US3570419A - Thermic lance - Google Patents

Thermic lance Download PDF

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Publication number
US3570419A
US3570419A US787854A US3570419DA US3570419A US 3570419 A US3570419 A US 3570419A US 787854 A US787854 A US 787854A US 3570419D A US3570419D A US 3570419DA US 3570419 A US3570419 A US 3570419A
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US
United States
Prior art keywords
tube
cross
enclosing
lance
sectional area
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US787854A
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English (en)
Inventor
Ernst Brandenberger
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Individual
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Individual
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Filing date
Publication date
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Publication of US3570419A publication Critical patent/US3570419A/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/14—Drilling by use of heat, e.g. flame drilling
    • E21B7/146—Thermal lances

Definitions

  • the present invention relates to an improved thermic lance which is operated by gaseous combustion and serves for forming bores or openings in concrete, stone, building walls, severing reinforced concrete and hard to clear material, having an enclosing tube and a plurality of rods located in this enclosing tube.
  • Another object of the invention is to provide commercially available steel tubes so that no expensive profiled tubes must be used.
  • the invention also relates to a method comprising the steps of introducing into a circular enclosing tube a plurality of steel rods, the enclosing tube being subsequently deformed, with the exception of at least one of its ends, so that the cross-sectional shape is thereafter other than circular, the deformation is executed in such way that the ducts which extend in the longitudinal direction of the combustion lance and which serve for the passage of the oxygen for combustion being preserved.
  • FIG. 1 is a view of the thermic lance, partially in section:
  • HG. 2 is a cross-sectional view of the thermic lance of FIG. 1 taken along the line lI-II.
  • a plurality of core rods 5 made of iron and having preferably a circular cross section are packed or introduced into an enclosing tube 11 which is preferably made of unalloyed iron and is circular in its cross-sectional shape.
  • the number of the core rods 5 is so selected that these rods fill out the available space in the enclosing tube in the best possible manner and are maintained in position by a mutual wedging action, although the ease with which the rods are introduced into the enclosing tube is not adversely affected thereby.
  • the enclosing tube is provided at both its ends with a short exterior screw thread 4 so that two of these enclosing tubes can be attached together by means of a connecting sleeve, or one end of the enclosing tube can be connected to a hose pipe or other tube which is connected to a source of the oxygen required for combustion.
  • the internal cross-sectional area of the tube is reduced, and the spaces extending in the longitudinal direction of the enclosing tube, and constituted by the spaces 6 or longitudinal ducts between the individual core rods and by the spaces between the core rods themselves and the enclosing tube, are so reduced that these combined spaces amount to about oneninth to one-eighteenth, and preferably approximately oneeleventh .to one-sixteenth, of the total cross-sectional area of the metal. It is desirable that the ducts for the flow of oxygen should be distributed as uniformly as possible over the whole of the available cross-sectional surface, so as to ensure a uniform combustion at the tip of the lance.
  • the enclosing tube may be caused to assume cross-sectional shapes other than circular, for example they may be given triangular, polygonal, semicircular or other shapes.
  • Thermic boring and severing equipment is simple, easy to operate and highly mobile and this method is preferred if quietness, simplicity, speed and economy is important.
  • Therrnic lance for gaseous combustion for forming cavities or openings in concrete, stone, building walls, comprising a steel tube, and a plurality of steel core rods enclosed by said tube, said tube having gas connecting means at one end, intermediate spaces being formed between said core rods and said tube extending in the longitudinal direction of said tube serving for the conveyance of gas for combustion, and said tube having a cross-sectional shape other than circular except at least one of its end parts.

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  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Gas Burners (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Reinforcement Elements For Buildings (AREA)
US787854A 1968-01-03 1968-12-30 Thermic lance Expired - Lifetime US3570419A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH2368A CH484715A (de) 1968-01-03 1968-01-03 Gas-Brennlanze zur Erzeugung von Öffnungen in Beton, Gestein, Gebäudemauern und dgl.

Publications (1)

Publication Number Publication Date
US3570419A true US3570419A (en) 1971-03-16

Family

ID=4177618

Family Applications (1)

Application Number Title Priority Date Filing Date
US787854A Expired - Lifetime US3570419A (en) 1968-01-03 1968-12-30 Thermic lance

Country Status (10)

Country Link
US (1) US3570419A (ja)
AT (1) AT287561B (ja)
BE (1) BE726145A (ja)
CA (1) CA991979A (ja)
CH (1) CH484715A (ja)
DE (1) DE1816853C2 (ja)
FR (1) FR1598580A (ja)
GB (1) GB1254885A (ja)
NL (1) NL6900145A (ja)
SE (1) SE359044B (ja)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3738288A (en) * 1971-02-05 1973-06-12 Kubatec Kunststoff U Bautechni Thermic lance
US3921542A (en) * 1974-01-23 1975-11-25 Kubatec Kunststoff Oxygen supplied thermal lance
US4391209A (en) * 1981-06-16 1983-07-05 Arcair Company Exothermic cutting electrode
US4401040A (en) * 1981-10-21 1983-08-30 Volcano Corporation Thermal torch
US4437649A (en) 1981-06-16 1984-03-20 Arcair Company Exothermic cutting electrode
US4697791A (en) * 1985-12-31 1987-10-06 Arcair Company Exothermic cutting electrode
US4864093A (en) * 1988-10-05 1989-09-05 Arcair Company Exothermic cutting electrode
US5622672A (en) * 1995-03-24 1997-04-22 Alloy Surfaces Co. Ignition of thermal lance and means and method for use therewith and therefor
US7691321B2 (en) 2006-04-13 2010-04-06 Air Products And Chemicals, Inc. Thermic lance
US20150069676A1 (en) * 2013-09-11 2015-03-12 Eric Peterson Exothermic cutting blade

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3260076A (en) * 1963-12-02 1966-07-12 Humberg Willi Deflagrating metallic cutting torch

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3260076A (en) * 1963-12-02 1966-07-12 Humberg Willi Deflagrating metallic cutting torch

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3738288A (en) * 1971-02-05 1973-06-12 Kubatec Kunststoff U Bautechni Thermic lance
US3921542A (en) * 1974-01-23 1975-11-25 Kubatec Kunststoff Oxygen supplied thermal lance
US4391209A (en) * 1981-06-16 1983-07-05 Arcair Company Exothermic cutting electrode
US4437649A (en) 1981-06-16 1984-03-20 Arcair Company Exothermic cutting electrode
US4401040A (en) * 1981-10-21 1983-08-30 Volcano Corporation Thermal torch
US4697791A (en) * 1985-12-31 1987-10-06 Arcair Company Exothermic cutting electrode
US4864093A (en) * 1988-10-05 1989-09-05 Arcair Company Exothermic cutting electrode
US5622672A (en) * 1995-03-24 1997-04-22 Alloy Surfaces Co. Ignition of thermal lance and means and method for use therewith and therefor
US7691321B2 (en) 2006-04-13 2010-04-06 Air Products And Chemicals, Inc. Thermic lance
US20150069676A1 (en) * 2013-09-11 2015-03-12 Eric Peterson Exothermic cutting blade

Also Published As

Publication number Publication date
DE1816853C2 (de) 1981-04-23
NL6900145A (ja) 1969-07-07
FR1598580A (ja) 1970-07-06
AT287561B (de) 1971-01-25
CA991979A (en) 1976-06-29
DE1816853A1 (de) 1969-07-31
SE359044B (ja) 1973-08-20
GB1254885A (en) 1971-11-24
CH484715A (de) 1970-01-31
BE726145A (ja) 1969-05-29

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