US3623437A - Device for burning holes into concrete masonry stone or metal - Google Patents

Device for burning holes into concrete masonry stone or metal Download PDF

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Publication number
US3623437A
US3623437A US13606A US3623437DA US3623437A US 3623437 A US3623437 A US 3623437A US 13606 A US13606 A US 13606A US 3623437D A US3623437D A US 3623437DA US 3623437 A US3623437 A US 3623437A
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cross
burning
section
rod
metal
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US13606A
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English (en)
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Eduard Lusser
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    • 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 invention relates to a device for burning holes into concrete, masonry, stones or metal which consists of a metallic burning rod that has at least one channel which extends over the entire length and is connected at the rearward end with a source of oxygen under excess pressure.
  • Devices of this type are already known. They are frequently referred to as oxygen lances and heretofore they were usually made from a thick walled iron or steel tube in the hollow space of which iron or steel wires were arranged and often also magnesium wires.
  • the oxygen is blown through at an excess pressure of 3.5 to 25 atm. and the front end of the burning tube is heated, for example, with a welding flame or torch until the tube itself begins to burn under the influence of the oxygen.
  • the burning tube is now pressed against the material that is to be bored or cut off, to rexample, concrete. The heat causes the metal to melt and the iron oxides start chemical reactions in concrete and stone which result in lower melting points so that the material flows out in the form of liquid lava.
  • the holes produced by this burning bore method are round holes corresponding to the form of the burning tube. If elongated cuts are produced, for example, in order to cut out a door opening in a concrete wall, then one hole has to be lined up with another until the clear cross section of the part to be cut out is severed.
  • the cutting of longer slots can be effected. particularly advantageously, i.e., that manner of use for which the burn boring is utilized in construction work in more than 95% of all cases.
  • the device in accordance with the invention, has the qualities that the channel of the burning rod which conducts the oxygen is in the form of a longitudinal slot as seen in cross section, While the length of the slot is a multiple of the width of the slot and the main masses of the rod material as seen in this cross section are arranged perpendicularly to the length of the slot.
  • the oxygen that emerges from the slot expands preferably in that direction in which the main mass of the rod material is located, so that the liquid iron is pulled along in spark and droplet form primarily in both directions perpendicularly to the length of the slot and is cast against the material to be melted, for example, the concrete. If the rod is correspondingly dimensioned, this permits that the reduction of this material takes place in the form of an ellipse whose main axis extends perpendicularly to the length of the slot.
  • FIG. 1 is a perspective view of a section of a first embodiment of a burning rod
  • FIG. 2 is a cross section through a second embodiment of a burning rod with the cross sectional plan of the bore produced with it, and
  • FIG. 3 is a cross section of a third embodiment of a burning rod assembled from three profiled bars.
  • the burning rod illustrated in FIG. 1 comprises two rectangular iron rods 1, 2, which are connected with one another, for example, by resistance welding with two sheet metal strips 3, 4, for example of iron, interposed to form a channel 5 for the passage of the oxygen.
  • the cross section of the channel 5 must be formed in such a manner that its length c is a multiple of its width it (see FIG. 2).
  • the main masses of the rod material are in this connection disposed perpendicularly to the length of the slot 5.
  • FIG. 2 shows a cross section of a burning rod which is welded together out of two formed or profiled bars 6, 7 which are L-shaped in cross section
  • FIG. 3 an embodiment is illustrated assembled from three formed rods 8, 9, 10 and which has two arcuate slots 5 that are disposed convex with respect to one another in mirror image fashion.
  • the burned out cross section of the hole has the form of an ellipse 11 as indicated in FIG. 2.
  • the production of a cut in a concrete wall by burning of oval holes aligned with one another becomes all the more economical, the smaller the secondary axis b of an ellipse 11 is in relation to the major axis a, i.e. the less material has to be burned out in a direction transversely of the cut.
  • a burning rod of the type illustrated in FIG. 3 having two slots 5 in this respect produces a still better effect because the curving of the slots produces an additional bundling of the spark ray in the directions of the greatest cross sections of the rod material, thus in the drawing upwardly and downwardly.
  • a window of 1 In. x 1 m. is to be cut out in a concrete Wall which corresponds to a cut that is 400 cm. in length.
  • the new burning tube however provides still other advantages. Since the burned out bores are of elliptical cross section, it is possible for example in order to produce an anchorage in a concrete wall to first burn an elliptical hole of a certain depth having a vertical main axis and then to turn the burning rod by 90 and produce in the depth an elliptical hole having a horizontal main axis. In this manner it is then possible to insert longitudinal anchoring plates into the bore and secure them by turning them 90. Such an anchorage can absorb much higher dimensional forces than an anchorage concreted into a round hole.
  • Device for use in burning holes into concrete, masonry, stones or metal comprising a metal rod of uniform rectangular cross section throughout its entire length and provided along its entire length with at least one channel adapted to conduct oxygen under pressure from one end of said rod to its other end, the cross section of said channel has the shape of a narrow slot having parallel walls disposed substantially parallel to two opposed sides of the cross section of said rod, the long sides of the cross section of said narrow slot having a dimension which is a multiple of the narrow width of said slot, while the thickness of the solid wall formed between the longitudinal dimension of said slot and said two opposed sides of the cross section of said rod is in excess of the narrow width of said slot.
  • Device for use in burning holes into concrete, masonry, stones or metal comprising a metal rod of uniform rectangular cross section throughout its entire length and provided along its entire length with two laterally spaced channels adapted to conduct oxygen under pressure from one end of said rod to its other end, the cross section of each of said channels has the shape of a narrow slot having parallel walls disposed substantially parallel to two opposed sides of the cross section of said rod, the long sides of the cross section of said narrow slots having a dimension which is a multiple of the narrow width of said slots, while the thickness of the solid wall formed between the longitudinal dimension of each of said slots and said two opposed sides of the cross section of said rod is in excess of the narrow width of said slots (FIG. 3).
  • Device for use in burning holes into concrete, masonry, stones or metal comprising metal rod means of uniform rectangular cross section throughout its entire length, one side of said cross section being longer than the one extending at right angles thereto, said metal rod means being provided along its center axis with a channel whose cross section is also rectangular, the two longer opposite sides of the cross section of said metal rod means being disposed parallel to the adjacent longer opposite sides of the cross section of said channel, whereby the longer side of the cross section of said channel is a multiple of the length of the smaller side of the cross section of said channel, and the thickness of the wall formed between the longer sides of said two cross sections is in excess of the smaller sides of the cross section of the channel.
  • said metal rod means comprises two parallel rectangular metal bars spaced from each other and united with each other by two sheet metal strips extending therebetween and along the opposed faces of said two bars and along the outer edges of the same.
  • said metal rod means comprises two similar bars of L-shaped cross section of which one leg of each bar of said cross section has a length equal to the smaller side of the cross section of said channel while the other leg is longer, whereby the end face of each short leg is attached to the inner face of the longer leg of the other bar, thereby forming said channel.
  • Device for use in burning holes into concrete, masonry, stones or metal comprising a metal rod of uniform cross section throughout its entire length and provided along its entire length with at least one channel adapted to conduct oxygen under pressure from one end of said rod to its other end, the cross section of said channel has the shape of a narrow slot having parallel walls, the long sides of the cross section of said narrow slot having a dimension which is a multiple of the narrow width of said slot, while the thickness of the solid wall portions formed between the long sides of said slot and the perimetric surface of the rod at each point from said long sides is greater than the thickness of the solid wall portions formed between the short sides of said narrow slot and the perimetric surface of the rod at each point from said short sides.

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  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Earth Drilling (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Spray-Type Burners (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
US13606A 1969-02-25 1970-02-24 Device for burning holes into concrete masonry stone or metal Expired - Lifetime US3623437A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH282269A CH503562A (de) 1969-02-25 1969-02-25 Vorrichtung zum Brennen von Löchern in Beton, Mauerwerk, Gestein oder Metall

Publications (1)

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US3623437A true US3623437A (en) 1971-11-30

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US13606A Expired - Lifetime US3623437A (en) 1969-02-25 1970-02-24 Device for burning holes into concrete masonry stone or metal

Country Status (13)

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US (1) US3623437A (enrdf_load_stackoverflow)
JP (1) JPS5013721B1 (enrdf_load_stackoverflow)
AT (1) AT291836B (enrdf_load_stackoverflow)
BR (1) BR7016966D0 (enrdf_load_stackoverflow)
CH (1) CH503562A (enrdf_load_stackoverflow)
DE (1) DE2007278A1 (enrdf_load_stackoverflow)
DK (1) DK122043B (enrdf_load_stackoverflow)
FR (1) FR2035724A5 (enrdf_load_stackoverflow)
GB (1) GB1257885A (enrdf_load_stackoverflow)
IL (1) IL33905A (enrdf_load_stackoverflow)
NL (1) NL7002640A (enrdf_load_stackoverflow)
NO (1) NO124910B (enrdf_load_stackoverflow)
SE (1) SE348519B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4184239A (en) * 1976-03-11 1980-01-22 Clawson Roger B Method of working an adjustable sprinkler head
US4190121A (en) * 1976-02-20 1980-02-26 Messerschmitt-Bolkow-Blohm Gmbh Thermal drilling device
US4962891A (en) * 1988-12-06 1990-10-16 The Boc Group, Inc. Apparatus for removing small particles from a substrate

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5414288U (enrdf_load_stackoverflow) * 1977-06-30 1979-01-30
JPS5414289U (enrdf_load_stackoverflow) * 1977-06-30 1979-01-30
JPS5414291U (enrdf_load_stackoverflow) * 1977-06-30 1979-01-30
JPS5414290U (enrdf_load_stackoverflow) * 1977-06-30 1979-01-30
JPS5414287U (enrdf_load_stackoverflow) * 1977-06-30 1979-01-30

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4190121A (en) * 1976-02-20 1980-02-26 Messerschmitt-Bolkow-Blohm Gmbh Thermal drilling device
US4184239A (en) * 1976-03-11 1980-01-22 Clawson Roger B Method of working an adjustable sprinkler head
US4962891A (en) * 1988-12-06 1990-10-16 The Boc Group, Inc. Apparatus for removing small particles from a substrate

Also Published As

Publication number Publication date
FR2035724A5 (enrdf_load_stackoverflow) 1970-12-18
CH503562A (de) 1971-02-28
SE348519B (enrdf_load_stackoverflow) 1972-09-04
JPS5013721B1 (enrdf_load_stackoverflow) 1975-05-22
NL7002640A (enrdf_load_stackoverflow) 1970-08-27
DE2007278A1 (enrdf_load_stackoverflow) 1971-04-01
GB1257885A (enrdf_load_stackoverflow) 1971-12-22
IL33905A0 (en) 1970-04-20
AT291836B (de) 1971-07-26
DK122043B (da) 1972-01-10
BR7016966D0 (pt) 1973-02-01
NO124910B (enrdf_load_stackoverflow) 1972-06-26
IL33905A (en) 1972-12-29

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