US2525055A - Heating and hardening burner - Google Patents

Heating and hardening burner Download PDF

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Publication number
US2525055A
US2525055A US590646A US59064645A US2525055A US 2525055 A US2525055 A US 2525055A US 590646 A US590646 A US 590646A US 59064645 A US59064645 A US 59064645A US 2525055 A US2525055 A US 2525055A
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burner
passages
channels
burner body
slots
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US590646A
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Jr Bert G Ward
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National Cylinder Gas Co
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National Cylinder Gas Co
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46Details, e.g. noise reduction means
    • F23D14/48Nozzles
    • F23D14/52Nozzles for torches; for blow-pipes
    • F23D14/54Nozzles for torches; for blow-pipes for cutting or welding metal

Definitions

  • This invention relates to blowpipes or burner apparatus of the type designed and adapted for producing a row of closely spaced high temperature flames for the heat treatment of the surface of an article, as for instance in flame blasting and descaling operations to remove scale, rust, or other adhering material therefrom, or to so alter said material that it may be easily removed mechanically.
  • the burner head when in use, is disposed quite close to the surface to be heated, and therefore when used continuously for a long period, the head is liable to become heated to such an extent that there is liability of injury to the head, or preignition of the gas mixture within the torch head.
  • a new and improved construction which facilitates the cooling of the head during the use thereof.
  • the burner outlets be kept at a substantially constant distance from said surface as the burner moves over it. This is commonly accomplished by resting the side or edge of the burner on said surface, and with the flames projected from an adjacent side and at an angle to said surface.
  • the burner body is commonly formed of copper or other metal or alloy which is much. softer than a. steel or iron plate presenting the surface to be treated, and as said surface is often quite rough, the sliding movement of the burner head over the rough hard surface causes wear which materially shortens the life of the burner.
  • the burner body is provided with grooves or channels dis posed between adjacent gas outlet passages and substantially parallel thereto, and the guard member coacts with the burner body to close the outer sides of these channels while leaving both ends open.
  • the cooling passages are arranged as channels in the surface of the burner body, they may be readily and easily cut with a milling tool, and without the necessity for drilling the burner body or providing special piping for a cooling fluid.
  • Fig. 1 is a perspective View of the burner with a portion only of the handle thereof.
  • Fig. 2 is a side elevation of the burner body and guard, portions thereof being shown in section.
  • Fig. 3 is a face view of the burner
  • Figs. 4 and 5 are sections on the lines 44 and 55 respectively of Fig. 2.
  • a burner body I! which is in general of rectangular form as to its longitudinal and transverse sections. This maybe formed of copper or other suitable material, and has a longitudinal passage II which may be formed by drilling a hole therethrough and then closing the opposite ends of the hole with plugs 52.
  • the handle I3 is welded or otherwise secured to the rear face I 4 of the burner body and communicates with the passage ll intermediate of the ends of the latter.
  • the combustible and combustion supporting gases which are ordinarily acetylene and oxygen, may be delivered from suitable valve controlled pipes to a mixer at the outer end of the handle.
  • the burner body is provided with a row of small discharge passages 15 leading from the manifold passage II to the front face l6 which is opposit to the rear face 14.
  • the mixture of gases 3 delivered through the handle l3 and the manifold passage ll flows through all of the passages l5 and forms a row of small high temperature flames at the outlets of the passages l5.
  • the burner body is provided with a series of transverse slots ll extending in from the front face it for a considerable distance.
  • These slots may, if desired, be arranged alternately with the discharge passages l5, but preferably they are arranged between each alternate pair of passages, so that there will be two passages [5 between each two of the slots IT.
  • the side faces I8 and it of the burner body are provided with channel or grooves opposite to each of the slots [1, and the channels are preferably substantially V-shaped, and may be tapered so that at their upper ends they merge into the side faces of the burner, and with the smaller or pointed upper ends of the grooves slightly above the inner ends of the slots ll. As is shown, these grooves extend rearwardly from the burner face for a substantial distance.
  • each of which may have one edge substantially in t -e plane of the face E6 of the burner body, or may extend slightly therebeyond.
  • and 22 is spaced at some distance below the upper ends of the channels 20 and the slots ll. In other words, the width of each plate is somewhat less than the length of the channels.
  • the plates may have lugs or extensions 23 at the ends thereof, and if desired, at a few intermediate poin'ts, and by means of which the plates ma be secured to the burner body by screws, rivets or pins 24.
  • the two plates 2i and 22 are made from a single piece of metal which may extend all the way around the burner body and across the ends of it as well as across the sides. These plates are of very much harder material than the burner body, so that when the burner is held in an inclined position in respect to a hard rough surface to be treated, for instance as shown in Fig. 1, the edge of one plate will bear on said surface and will prevent the burner body from being worn away by repeated movement over said surface. These plates, if they become worn or warped, may be readily removed and replaced b new ones by merely removing the screws, rivets or pins 2 3.
  • the plates in my improved construction serve a double function, in that the not only protect the burner body from. wear, but they also engage the faces i8 and [9 between adjacent channels so as to form the outer wall of passages which are open at their upper and lower ends.
  • the flames projected from the outlet ends of the discharge passages it will induce air currents through the channels 20 from the upper ends of the latter to the lower ends, and this automatically induced air circulation through the channels will keep the burner body reasonabl cool and prevent such overheating as might injure the burner or cause preignition in the passages thereof.
  • the channels and the slots coact to subdivide the lower portion of the burner body into a series of relatively small nozzles between which air may circulate to insure proper cooling.
  • the channels or air passages are so spaced that there are two gas outlet passages between successive channels. Obviously there might be a lesser number of such channels, or there might be a separate channel between each two gas passages.
  • the lugs may be omitted from the plates if desired, and the plates be held in place only by attaching members at the ends of the burner body.
  • the plates with their connecting end portions may be considered as a sleeve telescoped onto the burner body.
  • the side plates serve to protect the air channels of the burner body from becoming clogged or filled with material detached from and thrown up from the surfaces being treated. In case any clogging or filling of the channels occurs, it will be obvious that they may be readily cleaned out by brushes applied to the channels and thin blades projected through the slots.
  • a flame blasting or descaling burner for producing a plurality of high temperature heating flames including an elongated metal body having a single manifold passage extending lengthwise thereof, a supply passage leading into said manifold passage for delivering a combustible gas mixture thereto, a row of branch passages leading from said manifold passage to outlets in the face of the burner body to discharge a plurality of spaced streams of said combustible gas mixture to form a plurality of high temperature heating flames, said body having also a plurality of grooves formed in opposite sides thereof, located between pairs of said branch passages, substantially parallel thereto and extending rearwardly for a substantial distance from said face of the burner, and plates extending lengthwise of said burner secured thereto on opposite sides thereof and covering only a portion of the length of said grooves adjacent to the said face of the burner and defining with said grooves open-ended passages terminating at said face adjacent to and between pairs of said outlets for said combustible gas mixture.
  • a flame blasting or descaling burner for producing a plurality of high temperature heating flames, including an elongated metal body having a single manifold passage extending lengthwise thereof, a supply passage leading into said manifold passage for delivering a combustible gas mixture thereto, a row of branch passages leading from said manifold passage to outlets in the face of the burner body to discharge a plurality of spaced streams of said combustible gas mixture to form a plurality of high temperature heating flames, said body having also a plurality of grooves formed in opposite sides thereof, located between pairs of said branch passages, substantially parallel thereto and extending rearwardly for a substantial distance from said face of the burner, said grooves in opposite sides of said burner being connected in pairs by slots extending for a substantial distance from said faceof the burner, and plates extending lengthsides thereof and covering only a portion of the wise of said burner secured thereto on opposite UNITED STATES PATENTS Number Name 7 Da length of said grooves and slots adjacent to the 804 00

Description

Get. 10; 1950 v B. s. WARD, JR 2,525,055
HEATING AND HARDENING BURNER Filed April 2'7,- 1945 INVENTOR Bert 0 ifqfiaf .111
' ATTORNEYS 4 I- IO Patented Oct. 10, 1953 UNITED STATES rAr Nr OFFICE Bert G. Ward, Jr,
2 Claims.
This invention relates to blowpipes or burner apparatus of the type designed and adapted for producing a row of closely spaced high temperature flames for the heat treatment of the surface of an article, as for instance in flame blasting and descaling operations to remove scale, rust, or other adhering material therefrom, or to so alter said material that it may be easily removed mechanically.
In apparatus of this general type it is. common practice to secure the burner head intermediate of its ends to a handle extending at right angles thereto, and through which handle the mixture of combustible and combustion supporting gases is delivered to a passage disposed in and extending lengthwise of the burner head, and from which passage there leads a row of branch passages to the row of gas outlets at which the flames are formed.
As the flames are small, the burner head when in use, is disposed quite close to the surface to be heated, and therefore when used continuously for a long period, the head is liable to become heated to such an extent that there is liability of injury to the head, or preignition of the gas mixture within the torch head. As one feature of my invention there is provided a new and improved construction which facilitates the cooling of the head during the use thereof. I
In order toobtain uniform results on the surface being treated, it is desirable that the burner outlets be kept at a substantially constant distance from said surface as the burner moves over it. This is commonly accomplished by resting the side or edge of the burner on said surface, and with the flames projected from an adjacent side and at an angle to said surface. As the burner body is commonly formed of copper or other metal or alloy which is much. softer than a. steel or iron plate presenting the surface to be treated, and as said surface is often quite rough, the sliding movement of the burner head over the rough hard surface causes wear which materially shortens the life of the burner.
In order to reduce such wear, it has been proposed to provide the burner head with hard inserts along opposite sides thereof, but these materially increase the cost and often give trouble Chicago, Ill., assignor to National Cylinder Gas Company,.Chicago, 111., a corporation of Delaware Application April 27, 1945, Serial No. 590,646
due to the fact that they have a different co- As a further important feature the burner body is provided with grooves or channels dis posed between adjacent gas outlet passages and substantially parallel thereto, and the guard member coacts with the burner body to close the outer sides of these channels while leaving both ends open. Thus currents of cooling air are induced through said passages and act to prevent the burner body from becoming heated to an objectionably high temperature. By forming the cooling passages as channels in the surface of the burner body, they may be readily and easily cut with a milling tool, and without the necessity for drilling the burner body or providing special piping for a cooling fluid.
Various other objects and advantages will be apparent from a consideration of the specific embodiment shown in the drawing, or will be hereinafter pointed out. Except to the extent defined in the claims, the details may be modified in various ways and to various degrees without departing from the scope of the invention and without sacrificing the main advantages obtained thereby.
In the accompanying drawing:
Fig. 1 is a perspective View of the burner with a portion only of the handle thereof.
Fig. 2 is a side elevation of the burner body and guard, portions thereof being shown in section.
Fig. 3 is a face view of the burner, and
Figs. 4 and 5 are sections on the lines 44 and 55 respectively of Fig. 2.
In the construction illustrated there is provided a burner body I!) which is in general of rectangular form as to its longitudinal and transverse sections. This maybe formed of copper or other suitable material, and has a longitudinal passage II which may be formed by drilling a hole therethrough and then closing the opposite ends of the hole with plugs 52. The handle I3 is welded or otherwise secured to the rear face I 4 of the burner body and communicates with the passage ll intermediate of the ends of the latter.
The combustible and combustion supporting gases which are ordinarily acetylene and oxygen, may be delivered from suitable valve controlled pipes to a mixer at the outer end of the handle. As these features constitute no part of the present invention they have not been illustrated. The burner body is provided with a row of small discharge passages 15 leading from the manifold passage II to the front face l6 which is opposit to the rear face 14. Thus the mixture of gases 3 delivered through the handle l3 and the manifold passage ll, flows through all of the passages l5 and forms a row of small high temperature flames at the outlets of the passages l5.
In order to facilitate cooling of the burner, the burner body is provided with a series of transverse slots ll extending in from the front face it for a considerable distance. These slots may, if desired, be arranged alternately with the discharge passages l5, but preferably they are arranged between each alternate pair of passages, so that there will be two passages [5 between each two of the slots IT. The side faces I8 and it of the burner body are provided with channel or grooves opposite to each of the slots [1, and the channels are preferably substantially V-shaped, and may be tapered so that at their upper ends they merge into the side faces of the burner, and with the smaller or pointed upper ends of the grooves slightly above the inner ends of the slots ll. As is shown, these grooves extend rearwardly from the burner face for a substantial distance.
Secured to the burner bod are a pair of plates 2| and 22, each of which may have one edge substantially in t -e plane of the face E6 of the burner body, or may extend slightly therebeyond. The opposite edge of each of the plates 2| and 22 is spaced at some distance below the upper ends of the channels 20 and the slots ll. In other words, the width of each plate is somewhat less than the length of the channels. The plates may have lugs or extensions 23 at the ends thereof, and if desired, at a few intermediate poin'ts, and by means of which the plates ma be secured to the burner body by screws, rivets or pins 24. Preferabl the two plates 2i and 22 are made from a single piece of metal which may extend all the way around the burner body and across the ends of it as well as across the sides. These plates are of very much harder material than the burner body, so that when the burner is held in an inclined position in respect to a hard rough surface to be treated, for instance as shown in Fig. 1, the edge of one plate will bear on said surface and will prevent the burner body from being worn away by repeated movement over said surface. These plates, if they become worn or warped, may be readily removed and replaced b new ones by merely removing the screws, rivets or pins 2 3.
The plates in my improved construction serve a double function, in that the not only protect the burner body from. wear, but they also engage the faces i8 and [9 between adjacent channels so as to form the outer wall of passages which are open at their upper and lower ends. In the use of the burner, the flames projected from the outlet ends of the discharge passages it will induce air currents through the channels 20 from the upper ends of the latter to the lower ends, and this automatically induced air circulation through the channels will keep the burner body reasonabl cool and prevent such overheating as might injure the burner or cause preignition in the passages thereof.
The channels and the slots coact to subdivide the lower portion of the burner body into a series of relatively small nozzles between which air may circulate to insure proper cooling. By forming the slots and the channels by simple machining operation, it is not necessary to do any drilling of the burner body other than to provide the manifold passage II, the discharge passages l5, and the openings for the plate attaching elements 24.
I have referred to the forming of the nozzle by the cutting of the slots and the milling of the channels. It will of course be obvious that it is is not essential that there be two such separate cutting operations, as the channels may be cut sufiiciently deep so that they intersect, and therefore the separate forming of the slots I! is not necessary.
As previously indicated, the channels or air passages are so spaced that there are two gas outlet passages between successive channels. Obviously there might be a lesser number of such channels, or there might be a separate channel between each two gas passages.
The lugs may be omitted from the plates if desired, and the plates be held in place only by attaching members at the ends of the burner body. The plates with their connecting end portions may be considered as a sleeve telescoped onto the burner body. The side plates serve to protect the air channels of the burner body from becoming clogged or filled with material detached from and thrown up from the surfaces being treated. In case any clogging or filling of the channels occurs, it will be obvious that they may be readily cleaned out by brushes applied to the channels and thin blades projected through the slots.
Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:
l. A flame blasting or descaling burner for producing a plurality of high temperature heating flames, including an elongated metal body having a single manifold passage extending lengthwise thereof, a supply passage leading into said manifold passage for delivering a combustible gas mixture thereto, a row of branch passages leading from said manifold passage to outlets in the face of the burner body to discharge a plurality of spaced streams of said combustible gas mixture to form a plurality of high temperature heating flames, said body having also a plurality of grooves formed in opposite sides thereof, located between pairs of said branch passages, substantially parallel thereto and extending rearwardly for a substantial distance from said face of the burner, and plates extending lengthwise of said burner secured thereto on opposite sides thereof and covering only a portion of the length of said grooves adjacent to the said face of the burner and defining with said grooves open-ended passages terminating at said face adjacent to and between pairs of said outlets for said combustible gas mixture.
2. A flame blasting or descaling burner for producing a plurality of high temperature heating flames, including an elongated metal body having a single manifold passage extending lengthwise thereof, a supply passage leading into said manifold passage for delivering a combustible gas mixture thereto, a row of branch passages leading from said manifold passage to outlets in the face of the burner body to discharge a plurality of spaced streams of said combustible gas mixture to form a plurality of high temperature heating flames, said body having also a plurality of grooves formed in opposite sides thereof, located between pairs of said branch passages, substantially parallel thereto and extending rearwardly for a substantial distance from said face of the burner, said grooves in opposite sides of said burner being connected in pairs by slots extending for a substantial distance from said faceof the burner, and plates extending lengthsides thereof and covering only a portion of the wise of said burner secured thereto on opposite UNITED STATES PATENTS Number Name 7 Da length of said grooves and slots adjacent to the 804 002 Fouche J NOV said face of the burner and defining with said a 1 Stephens}; g, 1933 grooves and slots open-ended passages terminat- 5 1942352 Anderson Jan 1934 ing at said face adjacent to and between pairs of 1957587 Hager said outlets for said combustible gas mixture. 2356196 g QE'IIIZ' 1944 BERT WARD 2,356,197 Jones Aug. 22, 1944 REFERENCES CITED 10 i FOREIGN PATENTS The following references are of record in the Number Country Date file of this patent: 198,801
Great Britain Mar. 14, 1922
US590646A 1945-04-27 1945-04-27 Heating and hardening burner Expired - Lifetime US2525055A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4230447A (en) * 1977-04-27 1980-10-28 Thormack Engineering Ltd. Flared combustion chamber
US5334247A (en) * 1991-07-25 1994-08-02 Eastman Kodak Company Coater design for low flowrate coating applications

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US804002A (en) * 1903-10-10 1905-11-07 Eugene Alfred Javal Gas-blowpipe.
GB198801A (en) * 1922-03-14 1923-06-14 William Harry Addis Improvements in or relating to blow pipe burners
US1907604A (en) * 1929-11-26 1933-05-09 Allen Liversidge Ltd Oxyacetylene and similar heating burner
US1942352A (en) * 1930-08-02 1934-01-02 Air Reduction Welding torch
US1957587A (en) * 1932-03-05 1934-05-08 Hager William Louis Gas burner
US2356196A (en) * 1940-03-30 1944-08-22 Linde Air Prod Co Blowpipe apparatus
US2356197A (en) * 1941-12-19 1944-08-22 Linde Air Prod Co Blowpipe device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US804002A (en) * 1903-10-10 1905-11-07 Eugene Alfred Javal Gas-blowpipe.
GB198801A (en) * 1922-03-14 1923-06-14 William Harry Addis Improvements in or relating to blow pipe burners
US1907604A (en) * 1929-11-26 1933-05-09 Allen Liversidge Ltd Oxyacetylene and similar heating burner
US1942352A (en) * 1930-08-02 1934-01-02 Air Reduction Welding torch
US1957587A (en) * 1932-03-05 1934-05-08 Hager William Louis Gas burner
US2356196A (en) * 1940-03-30 1944-08-22 Linde Air Prod Co Blowpipe apparatus
US2356197A (en) * 1941-12-19 1944-08-22 Linde Air Prod Co Blowpipe device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4230447A (en) * 1977-04-27 1980-10-28 Thormack Engineering Ltd. Flared combustion chamber
US5334247A (en) * 1991-07-25 1994-08-02 Eastman Kodak Company Coater design for low flowrate coating applications

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