CA1103449A - Oxygen lance assembly - Google Patents
Oxygen lance assemblyInfo
- Publication number
- CA1103449A CA1103449A CA299,028A CA299028A CA1103449A CA 1103449 A CA1103449 A CA 1103449A CA 299028 A CA299028 A CA 299028A CA 1103449 A CA1103449 A CA 1103449A
- Authority
- CA
- Canada
- Prior art keywords
- pipe
- oxygen
- plate assembly
- plate
- connector
- 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
Links
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 109
- 239000001301 oxygen Substances 0.000 title claims abstract description 109
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 109
- 238000009628 steelmaking Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 104
- 230000000712 assembly Effects 0.000 claims description 19
- 238000000429 assembly Methods 0.000 claims description 19
- 230000002093 peripheral effect Effects 0.000 claims description 15
- 239000012298 atmosphere Substances 0.000 claims description 14
- 230000008859 change Effects 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 25
- 239000007789 gas Substances 0.000 description 15
- 238000013022 venting Methods 0.000 description 12
- 238000004891 communication Methods 0.000 description 7
- 230000008439 repair process Effects 0.000 description 7
- 239000007787 solid Substances 0.000 description 7
- 238000013461 design Methods 0.000 description 5
- 210000005069 ears Anatomy 0.000 description 5
- 230000008602 contraction Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- GRYSXUXXBDSYRT-WOUKDFQISA-N (2r,3r,4r,5r)-2-(hydroxymethyl)-4-methoxy-5-[6-(methylamino)purin-9-yl]oxolan-3-ol Chemical compound C1=NC=2C(NC)=NC=NC=2N1[C@@H]1O[C@H](CO)[C@@H](O)[C@H]1OC GRYSXUXXBDSYRT-WOUKDFQISA-N 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- 241000582342 Carria Species 0.000 description 1
- 238000009844 basic oxygen steelmaking Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4606—Lances or injectors
- C21C5/462—Means for handling, e.g. adjusting, changing, coupling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE An oxygen lance for use in a steel making furnace is disclosed. The lance can be easily disconnected from its top support member for change over of the lance so that only a single lance support carriage is required.
Description
:
The invention relates to lances ior use in steel-making operations. More specifically it rela-tes to an oxygen lance for use in a ~.O.F. basic oxygen steelmaking furnace.
The present invention relates to an improved oxygen steelmaking lance which can easily be disconnected from its top support member for change over of the lance so that only a single lance support carriage is required. The support member includes a first connector plate assembly which is provided with a plurality of openings in communication with the oxygen, water inlet and outlet pipes provided on the support member. The first plate assembly includes a lower flat surface. A second connector plate assembly is ~lamped to the first connector plate assembly by means of a pair of hinged bolts on the upper support which engage outwardly projecting ears provided on the second connector plate assembly. By merely loosening up the nuts on the bolts and swinging them outwardly the second connected plate assembly can be disconnected and by reverse procedure can be connect-ed. The second connector plate assembly also includes an upper ilat plate surface having openings which when the surfaces are clamped together provide for registry o-f the openings. The openings are slots o~ generally arcuate shape disposqd in circumferentially spaced relation in radially spaced rows from a central oxygen opening. Each slot is~
spaced from an adjacent slot by a solid portion of the plate assembly thus forming a number of circumferentially spaced radially extending webs. One of the flat surfaces of the plate assemblies is provided with annular grooves radially spaced between the slots, the same containing O-rings for-effectively sealing one row of slots from the other l'OWS and , ~t~L9 the central oxygen opening.
The lower connector plate assembly which comprises the upper flat plate includes an integral downwardly project-ing sleeve. The oxygen pipe of the top support member projects downwardly through the.central opening of the upper connector plate assembly and is provided at its lower end with an enlarged circumferential shoulder. The lower end of the oxygen tube projects through the flat surface of the second connector plate into the sleeve and is in relative sliding engagement with the upper end of a lower oxygen pipe. The lower oxygen pipe upper end includes an enlarged tubular portion which is disposed about and in telescoping engagement with the circumferential shoulder oi th~ upper oxygen pipe. The enlarged tubular portion is also in telescoping sliding engagement with the inner wall surface of the sleeve.
The arrangement provides for an upper slip joint adjacent the connection of the upper and lower connector plate assemblies.
The lower connector plate assembly supports the lower oxygen pipe and includes water inlet and outlet pipes providlng for passages which communicate with the aligned or registering slots of the connector plate assemblies.
The 51ip joint connection provided by the oxygen-pipes and sleeve include double O-ring seals which effective~
ly seal the slip joints. Between the sleeve and the oxygen pipes a vent chamber is provided which communicates with vent passages provided in the flat plate portion of the sleeve. The vent passages are disposed specifically in the radially disposed outwardly extending webs provided between , the arcuate slots. The upper connector plate is also provided with a peripherally downwardly extending flange overlapping the plate o~ the lower connector plate assembly.
This arrangement assures proper aligmnent of the plates in clamping relation. The peripheral ~lange is also provided with openings commun~cation with the vent passages to provide for communication with the atmosphere.
~RIEF DESCRIPTION OF THE DRA~INGS
FIG. 1, is a perspective view of an improved oxygen lance;
FIG. 2, is a side elevational view o~ the upper portion of an oxygen lance disclosing an improved connect and ~isconnect arrangement;
FIG. 3~ is a cross-sectional view taken along the line 3-3 of FIG. l;
FIG. 4, is an enlarged cross-sectional view of the connection of an upper and lower connector plate assembly and a slip joint and venting arrangement;
FIG. 5, is a cross-sectional view taken along the line 5-5 of FIG. 3;
FIG. 6, is a cross-sectional view taken along the line 6-6 of FIG. 3;
FIG. 7, is similar to FIG. 3 but showing a modi-~ied top support arrangement; and FIG. $, is an enlarged cross-sectional view oi the modified embodiment shown in FIG. 7.
FIG. 9, is a perspective view oi a lance arrange-ment;
~ IG. 10, is an enlarg d elevational view of theupper portion o~ the lance o~ FIG. 9;
~ IG. 11, is a cross-sectional view taken along the line 11-11 o~ FIG. 9;
FIG. 12, is a cross-sectional view, enlarged and in detail showing the connection o~ a pair o~ connector assemblies;
FIG. 13, is a cross-sectional view talsen along the line 13-13 of FIG. 11; and ~ FIG. 14, is a cross-sectional view taken along the : line 14-14 o~ FIG. 11;
FIG. 15, is a perspective view oi an improved oxygen lance;
FIG. 16, is an enlarged elevational view of an upper lance portion;
FIG. 17, is a cross-sectioned view~taken along the line 17-17 o~ PIG. 15;
FIG. 18, is an enlarged cross-sectional view oi a connecting and sealing arrangement ior a connector plate ~ assembly;
- FIG. 19, is a cross-sectional view taken along the line 19-19 o~ FIG. 17; and : FIG. ZO:, is a cross-sectional view taken along the line 20-20 OI FIG. 17;
FIG. 21, is a cross-sectional view taken along t~e line 21-21 o~ FIG. 17;
FIG. 22, is a perspective view o~ an improved lance assembly;
FIG. 23, is an elevational view o~ a top portion of the lance assembly shown in FIG. 22;
FIG. Z4, is a cross-sectional view taken along the line 24-24 o~ FIG. 22;
FIG. 25, is A partial cross-sectional view of a pair of connector plate assemblies;
FIG. 26, is a cross-sectional view disclosing portions o~ a slip joint at the lower end of a lance assem-bly;
FIG, 27, is a view similar to FIG. 24 showing another ~orm o~ the invention;
FIG. 28, is a detail view in cross-section oi a connector plate assembly;
FIG, 29, is a detail cross-sectional view o~ a slip joint at the lower end oi the lance shown in FIG. 27;
and FIGS. 30 and 31 are plan sections taken at lines 30~30 and 31-31 in FIG. 24;
FIG. 32 j is a perspectlve view o~ an improved oxygen lance;
FIG. 33, is a side elevational view of the upper portion oi an oxygen lance disclosing an improved connect and disconnect arrangement;
FIG. 34, is a cross-sectional view taken along the line 34-34 o~ FIG. 32;
FIG. 35, is an enlarged cross-sectional view o~
the connection of an uppe~r and lower connector plate assembly and a slip joint and venting arrangement;
FIG. 36, is a cross-sectional view taken along the line 36-36 of FIG. 34; and FIG. 37, is a cross-sectional view -taken along the line 37-37 o~ FIG. 34;
FIG. 38, is a cross-sectional view o~ a nozzle assembly connected to the lance disclosing a slip joint connection.
FIG. 39, is a perspeCtiYe view of an improved oxygen lance; .
FIG. 40, is an elevational view of the upper end of the lance of FIG. 39;
FIG. 41, is a cross-sectional view of an upper portion of the oxygen lance taken along the line 41-41 of FIG. 39;
FIG. 42, iS a cross-sectional view taken along the line 42-42 of FIG. 41;
FIG. 43, is a cross-sectional view taken along the line 43-43 of FIG. 41;
FIG. 44, iS a partial cross-sectional view of the lower portion of the oxygen lance of FIG. 39; and FIG. 45, is a cross-sectional view of a modified lance disclosing the upper portion thereof.
' ; ~ .
The invention relates to lances ior use in steel-making operations. More specifically it rela-tes to an oxygen lance for use in a ~.O.F. basic oxygen steelmaking furnace.
The present invention relates to an improved oxygen steelmaking lance which can easily be disconnected from its top support member for change over of the lance so that only a single lance support carriage is required. The support member includes a first connector plate assembly which is provided with a plurality of openings in communication with the oxygen, water inlet and outlet pipes provided on the support member. The first plate assembly includes a lower flat surface. A second connector plate assembly is ~lamped to the first connector plate assembly by means of a pair of hinged bolts on the upper support which engage outwardly projecting ears provided on the second connector plate assembly. By merely loosening up the nuts on the bolts and swinging them outwardly the second connected plate assembly can be disconnected and by reverse procedure can be connect-ed. The second connector plate assembly also includes an upper ilat plate surface having openings which when the surfaces are clamped together provide for registry o-f the openings. The openings are slots o~ generally arcuate shape disposqd in circumferentially spaced relation in radially spaced rows from a central oxygen opening. Each slot is~
spaced from an adjacent slot by a solid portion of the plate assembly thus forming a number of circumferentially spaced radially extending webs. One of the flat surfaces of the plate assemblies is provided with annular grooves radially spaced between the slots, the same containing O-rings for-effectively sealing one row of slots from the other l'OWS and , ~t~L9 the central oxygen opening.
The lower connector plate assembly which comprises the upper flat plate includes an integral downwardly project-ing sleeve. The oxygen pipe of the top support member projects downwardly through the.central opening of the upper connector plate assembly and is provided at its lower end with an enlarged circumferential shoulder. The lower end of the oxygen tube projects through the flat surface of the second connector plate into the sleeve and is in relative sliding engagement with the upper end of a lower oxygen pipe. The lower oxygen pipe upper end includes an enlarged tubular portion which is disposed about and in telescoping engagement with the circumferential shoulder oi th~ upper oxygen pipe. The enlarged tubular portion is also in telescoping sliding engagement with the inner wall surface of the sleeve.
The arrangement provides for an upper slip joint adjacent the connection of the upper and lower connector plate assemblies.
The lower connector plate assembly supports the lower oxygen pipe and includes water inlet and outlet pipes providlng for passages which communicate with the aligned or registering slots of the connector plate assemblies.
The 51ip joint connection provided by the oxygen-pipes and sleeve include double O-ring seals which effective~
ly seal the slip joints. Between the sleeve and the oxygen pipes a vent chamber is provided which communicates with vent passages provided in the flat plate portion of the sleeve. The vent passages are disposed specifically in the radially disposed outwardly extending webs provided between , the arcuate slots. The upper connector plate is also provided with a peripherally downwardly extending flange overlapping the plate o~ the lower connector plate assembly.
This arrangement assures proper aligmnent of the plates in clamping relation. The peripheral ~lange is also provided with openings commun~cation with the vent passages to provide for communication with the atmosphere.
~RIEF DESCRIPTION OF THE DRA~INGS
FIG. 1, is a perspective view of an improved oxygen lance;
FIG. 2, is a side elevational view o~ the upper portion of an oxygen lance disclosing an improved connect and ~isconnect arrangement;
FIG. 3~ is a cross-sectional view taken along the line 3-3 of FIG. l;
FIG. 4, is an enlarged cross-sectional view of the connection of an upper and lower connector plate assembly and a slip joint and venting arrangement;
FIG. 5, is a cross-sectional view taken along the line 5-5 of FIG. 3;
FIG. 6, is a cross-sectional view taken along the line 6-6 of FIG. 3;
FIG. 7, is similar to FIG. 3 but showing a modi-~ied top support arrangement; and FIG. $, is an enlarged cross-sectional view oi the modified embodiment shown in FIG. 7.
FIG. 9, is a perspective view oi a lance arrange-ment;
~ IG. 10, is an enlarg d elevational view of theupper portion o~ the lance o~ FIG. 9;
~ IG. 11, is a cross-sectional view taken along the line 11-11 o~ FIG. 9;
FIG. 12, is a cross-sectional view, enlarged and in detail showing the connection o~ a pair o~ connector assemblies;
FIG. 13, is a cross-sectional view talsen along the line 13-13 of FIG. 11; and ~ FIG. 14, is a cross-sectional view taken along the : line 14-14 o~ FIG. 11;
FIG. 15, is a perspective view oi an improved oxygen lance;
FIG. 16, is an enlarged elevational view of an upper lance portion;
FIG. 17, is a cross-sectioned view~taken along the line 17-17 o~ PIG. 15;
FIG. 18, is an enlarged cross-sectional view oi a connecting and sealing arrangement ior a connector plate ~ assembly;
- FIG. 19, is a cross-sectional view taken along the line 19-19 o~ FIG. 17; and : FIG. ZO:, is a cross-sectional view taken along the line 20-20 OI FIG. 17;
FIG. 21, is a cross-sectional view taken along t~e line 21-21 o~ FIG. 17;
FIG. 22, is a perspective view o~ an improved lance assembly;
FIG. 23, is an elevational view o~ a top portion of the lance assembly shown in FIG. 22;
FIG. Z4, is a cross-sectional view taken along the line 24-24 o~ FIG. 22;
FIG. 25, is A partial cross-sectional view of a pair of connector plate assemblies;
FIG. 26, is a cross-sectional view disclosing portions o~ a slip joint at the lower end of a lance assem-bly;
FIG, 27, is a view similar to FIG. 24 showing another ~orm o~ the invention;
FIG. 28, is a detail view in cross-section oi a connector plate assembly;
FIG, 29, is a detail cross-sectional view o~ a slip joint at the lower end oi the lance shown in FIG. 27;
and FIGS. 30 and 31 are plan sections taken at lines 30~30 and 31-31 in FIG. 24;
FIG. 32 j is a perspectlve view o~ an improved oxygen lance;
FIG. 33, is a side elevational view of the upper portion oi an oxygen lance disclosing an improved connect and disconnect arrangement;
FIG. 34, is a cross-sectional view taken along the line 34-34 o~ FIG. 32;
FIG. 35, is an enlarged cross-sectional view o~
the connection of an uppe~r and lower connector plate assembly and a slip joint and venting arrangement;
FIG. 36, is a cross-sectional view taken along the line 36-36 of FIG. 34; and FIG. 37, is a cross-sectional view -taken along the line 37-37 o~ FIG. 34;
FIG. 38, is a cross-sectional view o~ a nozzle assembly connected to the lance disclosing a slip joint connection.
FIG. 39, is a perspeCtiYe view of an improved oxygen lance; .
FIG. 40, is an elevational view of the upper end of the lance of FIG. 39;
FIG. 41, is a cross-sectional view of an upper portion of the oxygen lance taken along the line 41-41 of FIG. 39;
FIG. 42, iS a cross-sectional view taken along the line 42-42 of FIG. 41;
FIG. 43, is a cross-sectional view taken along the line 43-43 of FIG. 41;
FIG. 44, iS a partial cross-sectional view of the lower portion of the oxygen lance of FIG. 39; and FIG. 45, is a cross-sectional view of a modified lance disclosing the upper portion thereof.
' ; ~ .
2;;~
DESCRIPTION OF THE PREFERRED EMBODIMENT
~ IGS. 1 and 3 disclose an improved lance 10 compri-sing a top support or head 11 including a top plate 12 having an opening 13 connectad to an oxygen supply source or pipe 14.
A second top plate 15 is connected to the top plate 12 by means of bolt and nut fasteners 16. A first oxygen pipe 17 communicates with the supply source pipe 14 through the plate 15.
A first upper connector plate assembly 18 includes a plate 19 having a lower flat sur~ace 20 and a downwardly extending peripheral flange 21. The plate assembly 19 and top plate 15 have connected thereto a second pipe 22, to which a second water inlet connector 23 is connected. A
third water outlet pipe 24 is disposed outwardly of the se-cond pipe and communicates a water outlet connection 25.
A quick connect and disconnect clamping arrangement includes a pair o~ hinged bolts 26 hingedly`suspended from outwardly projecting bosses 27 provided on the third pipe 24.
The plate 19 oi the first connector plate assembly 18 includes a central oxygen opening 28 throu~h which the iirst oxygen pipe 17 projects. The plate 19, as best shown in FIG. 3, includes slo-ts or first openings 29 and 30 which are oi arcuate shape, disposed in radially spaced rows to register with slots in the lower connector plate assembly to be described. The slots 29 communicate with the water inlet connection 23 and second water inlet pipe 22. The slots 30 communicate with the third water outlet pipe 24 which com-municates with the water outlet connec-tion 25.
A second or lower connector plate assembly is de-signated at 31 and includes a sleeve 32 having an annular f~
flange or plate 33 provided with an upper annular flat sur-face 34. The flat surface 34 is provided with two rows of circumferentially disposed second slots 35 and 36 relatively radially spaced witb respect to each other. The de~inition of "circumferentially spaced" as used in this description is meant to include that the slots are spaced in a circle or annulus, and that they are also disposed inwardly from the other circumference of the lance. The slots are of arcuate shape and adjacent ends of the lots 35 and 36 provide solid radially extending circumferentially spaced solid webs 37 as best shown in FIGS. 5 and 6 which separate the adjacent slots.
As best shown in FIG. 4, a ring plate 38 having a flat upper surface 39 conforms to the lower flat surface 40 of the plate or flange 33 and is connected thereto by screws 41.
The second connector plate assembly 31 supports a fourth oxygen pipe 42, a fifth water inlet pipe 43, and a sixth water outlet pipe 44.
The water outlet pipe 44 has connected thereto wing projections 45 provided with slots 46 for receiving the bolt clamping members 26 in securing relation.
The pipes 42, 43 and 44 extend downwardly and are connected to a lance nozzle designated at 47. The nozzle 47 of the present design includes a discharge orifice 48 com-municating with a stup extension pipe 49 communicating with the oxygen pipe 42. The nozzle also includes a water outlet stub pipe 44' connected to the pipe 44. It also includes a stub pipe 43' connected to the lower end of pipe 43 to pro-vide a mechanical slip joint therewith. As indica-ted at 50, 4~
Ba~fle walls 51 are connected to the lower ends of the stub pipe 43' to direct the incoming water irom the inlet to the outlet pipes.
The present invention is particularly directed to the arrangement of the sealing and venting arrangements dis-closed.
As best shown in FIG. 4 and 5 the flat surface is provided with ring shaped grooves 52 within which seals in the form of O-rings 53 are secured. The O-rings 53 ef~ect-ively seal the water inlet and water outlet passages from one another at the connection of the ~at sur~aces of the connector plate assernblies. At atmospheric or zero pressure vent space or annular chamber 54 is provided by -the sleeve 32 and the outer wall of the first oxygen pipe 17. The in-nermost O-ring 53 seals this space 54 ~rom the water inlet slot~ 29 and 35; however, in the event water should seep past the innermost O-ring 53, it will be safely vented from the lance.
The sleeve 32 projects downwardly and the lower oxygen pipe 42 is provided at its upper end with an enlarged dia7neter tube or second sleeve 55 which at its upper end has a ~urther enlarged outer diameter portion 56 which supports two vertically spaced O-rings 57 in sliding sealing contact with the inner wall o~ the sleeve 32.
The lower end o~ the ~irst oxygen pipe 17 is pro-vided with an enlarged outer diameter portion, or piston like element 58 having two O-rings 59 vertically spaced re-latively and in sliding, sealing, and telescoping relation with the inner wall o~ the second sleeve 55.
As best shown in FIG. 3, 4, 5 and 6, vent bores or _9..
passages 60 are provided in the webs 37 and project radially horizontally outwardly. The peripheral flange 21 is provid-ed with outlet bores 61 communicating with the passages 60 and the atmosphere. It should be noted that the bores 61 are shown to extend radially; however~ they may extend down-wardly to vent through the lower surface 21' of the peri-pheral flange 21.
The ring 38 and upper surface 39 also include a cylindrical 0-ring 62.
TflE OPERATION OF THE PREFERRED EMBOI)IMENT
The operation of the lance disclosed is convention-al in that oxygen supplied from the supply pipe 14 flows downwardly through pipe 42, stub pipe 49 and through one or more discharge orifices 48 into a basic oxygen furnace ves-sel. Water flows from the water inlet connection 23 through arcuate passages 29 and 35 downwardlg along pipe 43 to the lower end of the nozzle 47 to cool the same whereupon it is directed upwardly along pipe 44 through the slots 30 and 36 outwardly through the water outlet connection 25. Thus the lance nozzle is effectively cooled.
The present invention resides in the quick discon-nect and connect feature afforded by the first and second connector assemblies with their unique disposition of the arcuate aligned slots when the assemblies are connected to-gether in clamping relation. The unusual dispostion of the 0-rings in the flat contacting surfaces of the connector plates asssures the positive sealing required to provide a quick clamp type disconnect arrangement. Thus the support assembly to which the upper connector plate assembly is at-tached can remain in place on the support carriage which is provided adjacent a B.O.F. vessel ~nd a lance can be replac-ed or interchanged within a short period. The support head can be used over and over again with new or repaired assern-blies. The lance of the present design can be of shorter length and thus is easier to handle and transport.
The present sealing arrangement and venting assures the continued operation without interruption of the oxygen blowing process. In disassembly of the lower connector plate from the upper, it is a simple matter to disconnect the same.
Upon disconnection the sleeve can readily be re-placed by merely loosening the cap screws 41 and inserting a new sleeve. This assures interchangeability of parts and eliminates oversizing the O-,ring piston in the e~ent of da-mage~ and also the O-ring is easily replaced.
The arrangement of the sleeve 32 with the upper and lower oxygen pipe slip joint arrangement also provides an effective connection, to absorb the telescoping sliding movement of the pipes during expanslon and contraction caus-ed by high temperature variations.
THE ~ODI~IED EMBODIMENT
FIG. 7 and 8 disclose a modified top support arangement. Wherever the parts are the same as disclosed in the pre~erred embodiment the same reference characters are utilized.
In the modification a top support 70 includes an upper plate 71 having an oxygen inlet connection to which the oxygen pipe 17 (more elongated) is connected. A ring or flange 73 is connected to the plate 70 by means of bolts and nuts (not shown). A water inlet connection 74 is connected to an inlet water pipe 75. The inlet water pipe 75 has con-nected thereto a ring plate 76'to which is connected a con-nector ring 77 by suitable bolts and nuts (not shown). The water pipe 75 has a slip joint connection 76 with a short : . ~
water pipe section 77 to accommodate tempera-ture differen-tials between incoming and outgoing cooling water to prevent the deYelopment of excessive internal stresses. The short pipe section 77'is connected to the first connector plate assembly 18 and communicates with the arcuate slots 29 and 35. An outlet pipe 78 is also connected to the first upper connector plate assembly 18. A water outlet connection 79 discharges water from the outlet pipe 78.
The operation of the modification is similar to the preferred embodiment the primary di~ference being the vertical o~fset of the water inlet and outlet connections as well as the mechanical slip joint arrangement 76 which may be desired in some applications.
The unique sealing arrangement and the venting as-semblies are similar and the same advantages as enumerated beiore are achieved.
In both embodiments, water cannot leak into the oxygen pipes, nor can oxygen leak into the water pipes.
DESCRIPTION OF ALTERNATIVE EMBODIMENT
A lance 110 comprises a top support or head member 111, first and second connector assemblies 112 and 113, and a lance nozzle 114.
The head or support member 111 comprises a top plate 115 which supports the upper end of a first central oxygen pipe 116 communicating with an oxygen supply pipe connection 117. A connector plate 118 is connected to the plate 115 by means of bolts 119. A gas inlet connection 120 communicates with a second gas pipe 121 concentric with ox-ygen pipe 116. A third water inlet pipe 122 is concentric with the second pipe and a fourth water outlet pipe 123 con-centric with plpe 122, is in communication with a water out-let connection 124. A water inlet connection 125 provides water to the third pipe 122.
The first oxygen pipe 116 projects through an opening 126 provided in a plate 127 of the first connector plate assembly 112. The plate 127 includes an outer periph-eral downwardly projecting flange 127'. The second, third, and fourth pipes 121~ 122, and 123 are connected at their lower ends to the plate 127 and communicates with first gas, water inlet, and water outlet openings respectively 132, 133, and 134, The second connector assembly 113 comprises a flat plate 129 having a peripheral downwardly projecting flange 130. The first oxygen pipe 116 projlects through a central opening 131. The plate 129 includes a second gas opening 135, a water inlet opening 136, and water outlet opening 137 communicatingr with the first openings of plate 127. The second connector assembly lncludes a third plate or flange portion 138 which is connected to a sleeve 139. The third plate 138 includes three openings, respectively a gas open-ing 140, water inlet opening 141 and water outlet opening 142. All of the gas openings, water inlet openings, and outlet openings therefore are in communication in the con-nected assembly of the first and second connector plates.
The sleeve 139 includes an inner surface 143 spac~
ed from the outer surface o~ pipe 116 to provide an annular space 144 therebetween.
A fifth oxygen pipe 145 includes an upward piston portion 146 which includes spaced 0-rings 147 in relative sliding or slip joint engagement wi-th the inner surface 143 of sleeve 139. This telescoping or slip joint connector in-cludes a piston portion on the lower end of pipe 116 which includes 0-rings 148 in sliding engagement with the inner surface 149 of piston portion 146. The annular space 144 provides at its upper end a chamber communicating with a vent passage 150 extending outwardly horizontally in the flange plate 138 and communicating with the atmosphere through a connected passage 151 in the flange 130.
. ~
A second sleeve~ portion 152 on the sleeve 139 and plate 138 is concentric and spaced outwardly of sleeve 139.
The sleeve portion 152 includes an i,nner surface 153 which is engaged in slip joint relation by means of the upper end 154 of a lower sixth gas pipe 155 projecting downwardly to-ward the no~zle.
A connector ring 156 disposed below the fl~nge or plate 138 is connected thereto by bolts 157'. A lower se-venth water inlet pipe 158 and water outlet pipe 159 is con-nected to said ring 156. The connector ring 156 includes 0-rings 157 in engagement with the underneath surface of plate 138.
The upper end 154 of gas pipe 155 includes 0-ring seals 158. Referring now to FIG. 13 the openings 135, 136 and 137 are disclosed as individual rows of slots with ad-jacent ends o~ each slot in spaced relation relative to the other slots to provide a plurality o~ webs 160. O-rings 161, 162, 163 and 164 are disposed in suitable recess within the surface of plate 129 for sealing one row of arcuate slots from the other.
Referring now to FIG. 14, the openings 140, 1~1 and 142 are also of arcuate shape and adjacent opposite ends of each slot are spaced to provide solid portions or web.s 165 within which the vent passage 150 extend. The upper surfaces of' the sleeve flange or plate portion 138 also in-cludes 0-rings 166, 167, and 168 which are disposed between adjacent openingrs 142, 141, and 140 for sealing them against leakage.
The nozzle 114 includes a plurality of oriflces 170 at the lower ends of the pipe 145. The gas pipe 155 provides for the flow of gas with the oxygen as desired. The lower end of the water inlet pipe has a slip joint connection with an inlet pipe stub 171 and the water outlet pipe 159 is con-nected at its lower end to the gas pipe 155.
Quick disconnect o~ the connector plate assemblies is achieved by the hinged bolts 172 hinged on bases 173 sup-ported on the outer pipe 122. The bolts 172 and nuts 174 are adapted to engage slotted ears 175 mounted on the water outlet plpe 155 to clamp the connector plates in assembly and to quickly dlsconnect the source.
In the operation oxygen and gas can flow through the oxygen and gas pipes in conventional fashion. The in-vention is primarily in the connector plate assemblies, tbe disposition of the slots and the effective sealing arrange-ments provided by the 0-rings. The sleeves and plates of the second connector assembly can easily be dismounted and the sleeve replaced. The 0-rings can easily be replaced and provides an effective seal to prevent the mixture of oxygen with gas.
In the event of leakage the novel vent passage arrangement and its disposition provides for venting to the atmosphere.
The slip joint connections accomodate the expan-sion and contraction occasioned by high temperature varia-tions. Thus the present gas and oxygen lance can quickly be disconnected at the site, and the major portion of the lance can be removed for repairs, replacement, transport or other service and again assembled.
DESCRIPTION OF ANOTHER ~MBODIMENT
An oxygen lance assembly 210, includes a top'sup-port member 211 having an upper plate 211' connected to an oxygen sup'ply pipe 212. An annular plate 213 is connected to the plate 211' by means of bolts and nuts 214. The top support member may be rigidly mounted on a lance carriage (not shown) adapted to be moved for operation adjacent to a basic oxygen vessel. The support member 211 includes a first oxygen pipe 215 and second and~third water inlet and outlet pipes respectively 216 and 217. The outlet pipe 217 is connected to an outlet connector 219, and the inlet 216 ;
; is connected to an inlet connector 218.
An upper connector plate assembly is designated at~
220 and includes a flat plate 221 having a lower ~lat sur-face 222 provided with a central opening 223 communicating with the oxygen pipe 215. The flat plate 221 includes a plurality of circumferentially disposed arcuate slots 224 and 225 positioned in radially,space'd rows. The term "cir- -cumferentially disposed" for the present disclosure is to indicate that the slots above and hereafter further describ-ed are spaced in an annular ring like or cylindrical manner in the flat plates. The slots 224 and 225 communicate res-pectively with the water inlet and outlet pipes 216 and 217.
A second connector plate assembly 226 includes a sleeve 227 which projects downwardly and is provided with an upper bore 228 communicating with the opening 223 and the first oxygen pipe 215. The sleeve 227 includes an upper flange or annular plate 229 having two rows of radially spaced circumferentially disposed arcuate slots 230 and 231 respectively communicating with the arcuate slots 224 and 225. The upper flat surface 232 of the plate 229 is in seal-ing relation relative to the lower flat surface 222 by means of a pair of radially spaced annular 0-rings 233.
As best shown in ~IGS. 18 and 21, an annular cham-ber 266 communicating with the atmosphere through radial passages 267 is provided in the plate 221 between the 0-rings 233.
The upper connector plate assembly 220 includes a peripheral downwardly extending flange 234 overlapping the outer peripheral surface of the plate 229. The ~lange 23 lS releasably connected for replacement purposes to the lower surface 222 of the first connector plate assembly by means of cap screws 235, one of which is shown in FIG. 17.
The second connector plate assembly 226 includes a ring 236 having an annular inner surface 237 in telescoping engagement with the outer cylindrical surface 238 of the sleeve 227. The ring 236 includes an upper annular flat sur-face 239 in sealing engagement with the flat surface 232 of the plate 229. The ring includes a plurality of arcuate slots 2~0 and 241, communicating respectively with the slots 230 and 225 and slots 231 and 225.
The disposition of the circumferentially disposed slo-ts 240 and 241 is disclosed in FIGS. 19 and 20.
Each of the slots are circumferentially spaced to provide in the ring member 236 a plurality of radially ex-tending webs 2~2 which separate, or provide solid interveningr walls in said number 236.
Vent passages 243 are positioned within the webs 242 and extend outwardly for communication with the atmos-phere. The vent passages 243 communicate with a peripheral passage 243' and vent passages 243" in sleeve 227.
All o~ the slots in the ring 236, the plate 229 . ~
and the plate 221 are the same shape~and spacing and regis-ter with one another in the clamped or connected position of the lance assembly.
; As best shown in FIGS. 18 and 19, the upper flat surface of the ring 236 is provided with two annular rows of recesses 244 and 245 containing 0-rings 246 and 247 which ~` ~ are positioned adjacent the annular openings 240 and 241 to effectively seal against the leakage of water. The surface 237 and outer surface 238 of the sleeve are also ef~ectively : :
sealed by an O~ring 24$.
.
A lower fourth oxygen pipe 249 includes an upper enlarged piston-like member 250 in relative telescoping or slip joint connection with the inner annular surface 251 of the sleeve 227. Pairs o~ upper and lower 0-rings respective-ly 252 and 253 are supported on the member 250 and a vent chamber or annulous 25~ is provided in the member 250 which communicates with the bores or passages 243' and 243".
A fifth water inlet pipe 255 and sixth water inlet pipe 256 are connected to the ring 23G, project downwardly wi-th respect thereto and communicate wi-th the slots 241 and 240 respectively.
A lance nozzle 257 is welded to the lower pipes and includes an outlet orifice 258 communicating with an oxygen stub pipe 259 which communicates with the oxygen pipe 249. An outer stub pipe 260 is connected to the pipe 256.
The pipe 255 is in telescoping relation at its lower end with a stub pipe position 261 to provide a mechanical slip JOint connector therebetween. The telescoping relation of the fourth oxygen pipe with the sleeve 227 accommodates a relative sliding movement occurring when the pipe contracts and expands lengthwise due to heat variations. The sIip joint between pipe 255 and stub pipe 261 also provides for this occurrence.
FIG. 16 discloses the quick disconnect and connect and connect arrangement whic~h includes a pair of bosses 262 which are mounted on the pipe 217. Bolts 263 are hin~edly connected to the bosses 262 and are placed in clamping re-lation with slotted keeper members or ears 264 mounted on the rin~ 36 by means of nuts 265.
THE OPERATION
The flow of oxygen through the lance nozzle and water through the inlet pipe, water chamber of the nozzle and through the outlet pipes is conventional.
The unique features of the present invention reside in the quick disconnect o~ the main portion or barrel lance ~rom the top support member ~11 when the lance is to be ser~
viced and portions have to be replaced. Release of the swinging bolts 263 from the keeper 264 permits the lower por-r~
tion of the lance and lower pipes to be dropped downwardly whereupon access is easily provided to replace seals, etc., and to conduct other repairs. The sleeve 227 which may be o~ brass or similar material can easily be replaced by dis-connectingr the cap screws 235.
The arrangement disclosed provides ior effec-tive sealing of all areas where leakage is possible and any leak-age ~rom the oxygen pipes through the slip joint connector o~ the piston member 250, or of water from the inlet pipe 255> or of water or oxygen ~rom the connector assembly, is easily and safely vented into the atmosphere. Thus all im-'~ portant and necessary surfaces are effectively sealed.
Water cannot leak into the oxygen pipe nor can oxygen leak into the water pipes.
The circum~erential slots are easily and quicklyregistered upon reassembly o~ the lance.
DESCRIPTION OF A FURTHER EMBODIMENT
An oxygen lance 310 includes an upper head or support member 311, an upper and lou~er connector plate as-sembly 312 and 313 and a discharge nozzle 314 as best shown in FIG. 22.
The support member 311 is adapted to be rigidly connected to a lance carriage which supports the lance ad-jacent to a B.O.F. furnace in the steelmaking process. The head 311 includes a top plate 315, an attaching plate ring 316, connected by bolts 317 to the top plate 315.
A ~irst oxygen pipe 318 communicates with an ox- -ygen source 319 and is connected to the top plate 315 and to a ~irst connector plate assembly 320. The assembly 320 ~ ?~ J
includes a flat plate ~having a lower ilat surface 322.
~ L~ 9 The head further includes second water inlet and third water outlet concentric pipes respectively 323 and 324.
A water inlet connection 325 communicates with the inlet pipe 323 and outlet connection 326 communicates with the outlet pipe 324. The connector plate assembly 320 in-cludes a central oxygen opening 327 and is provided with a plurality of slots 328 and 329 supported on and through the plate 321. A second connector plate assembly 330 in-cludes a flat plate 331 having an upper flat surface 332 which engages the lower flat surface 322 in relative clamp-ing sealing relation. The plate 331 also includes openings or slots 333 and 334 respectively in registry with the slots 328 ~nd 329.
A ~ourth oxygen pipe 335 is connected to the plate 331 and a central opening 336 in the plate 331 com-municating with the first oxygen pipe 318. A fifth water inlet pipe 336' is supported on the plate 331 and a sixth water outlet pipe 337 is also supported on the plate 331.
The pipes are concentric and the water inlet pipe 336' com-municates with openings 328 and 333 and the water outlet pipe 337 communicates with openlng 329 and 334.
Figure 31:discloses the positioning of openings or slots 328 and 329. FIG. 30 discloses the positioning of~ the complementary slots 333 and 334 which register with slots 328 and 329. The slots disclosed are of arcuate formation, annularly7 or circumferentially spaced with their adjacent ends spaced horizontally to provide a plurality of spaced webs 338 in the plate 321, and 339, in the plate 331. The upper plate 321 also includes a peripheral downwardly extend-ing flange 336 overlapping the plate 331.
The plate 331 also includes four radially spaced ring grooves containing O-rings 340, 341, 342, and 343 to seal the flat surfaces of the upper and lower plates, and particularly the areas between the openings 333 and 334 and 328 and 329.
As best shown in FI&. 31 the plate 321 is provided with a plurality of vent passages 345 extending horizontally and then vertically as indicated at 346 through the flange 336" to the atmosphere. The inner ends of the passage end in a vent chamber 347 which communicates with a bore 348 ex-tending through the plate 331 whereupon it communicates with a shroud or vent pipe 349 having its upper end connected to a connector ring 350 which is also connected -to pipes 336' and 337. The connector ring 350 is connected to the plate 331 by means of cap screws 350' which are easily removable to disengage ring 350 from plate 331.
The upper ends of pipes 336', 337 and vent pipe 349 are connected to the ring 350 by welding. The shroud pipe 349 envelopes the oxygen pipe 335 and extends downward- :
ly adjacent the nozzle 314. The lower end o~ the pipe 335 is provided with an enlarged outer projecting sleeve or pis-ton member 351 which includes a pair of vertically spaced O~rings 352 engaging and sealing the lower end of the shroud pipe 349.
The nozzle includes an orifice 353, a stub oxygen pipe 354 having a reduced outer dlameter portion 354i which .-is in slip joint or telescoping relation with the piston member 351 at the oxygen pipe 335. The reduced diameter portion 354'includes two pairs of vertically spaced O-rings 355 and 356 engabring the piston portion 351 in sliding ~3~
sealing relation.
An annular vent chamber 357 between the O-rings 355 and 35G is in communication with a bore 358 which com-municates with the shroud pipe 349 venting leakage through the passages 348, 347, 345 and 346 to the atmosphere. Ver-tical contraction and expansion of the pipes 335 and 349 are achieved by the slip joint arrangement disclosed and which is occasioned by the variations in temperature. The nozzle 314 also includes a slip joint pipe stub 360, having a me-chanical slicing connection with the lower end of the inlet pipe 336'. An O-ring 367 on ring 350 adjacent the connec-tion of the shroud 349 to the ring is in seal relation with the plate 331.
, The quick connect and dlsconnect arrangement is disclosed in FIG. 23 and includes a pair of bosses 361 suppor ted on pipe 324 which hingedly support bolts 362 hav-ing nuts 363 thereon.
The ~olts 362 and nuts 3G3 engage slotted locking ears 364 to releasably lock the connector assemblies to-getber.
. .
DESCRIPTION OF ANOTHER EMBODIMENT
FIGS. Z7, 28, and 29 show another form o~ the ln-vention wherein the shroud pipe 349 at its upper end is slidingly connected to a sleeve 370 suitably connected to the ring 350. The sleeve 370 has its upper surface 371 in sealing enæagement by means of an O-ring 372. The upper end oi the shroud pipe 349 is provided with a piston end 373 having O-rings 374 in sliding relation with the sleeve 370.
The lower end of the oxygen pipe 335 is provided with an enlarged piston portion 376 in sliding relation with the -2~
stub pipe 354 alld having an annular venting groove or cham-ber 377 slidingly sealed against the stub pipe 354 by upper and lower O'ring pairs 352 and 356, respectively, and in-cluding a passage 378 communicating with the shroud pipe 349 which is secured to the upper portion oi the piston portion 376.
This arrangement again permits expansion and con-traction of the lower oxygen and vent pipes.
The same reference characters will apply where the parts are similar. Additional parts have above been addi-tionally identified.
In the present lnvention in both instnnces the lancesof both designs operate similarly in ~lowing oxygen to the nozzle. They are both of the quick disconnect type which can quickly be removed from the top support members for service. The venting arrangement provides for venting of the lowermost slip joint to vent any lealsage o~ oxygen and water while at the same time providing for quick removal, repair or replacement of the top assembly. The novel seal-ing arrangements are designed to prevent leakage of oxygen into the water or water into oxygen. If it does occur the novel vent arrangement disclosed will provide proper and immediate discharge to the atmosphere.
DESCRIPTION OF ANOTHER E~BODIM~NT
FIGS. 32 and 34 disclose an improved lance 410 comprising a top support or head 411 including a top plate 412 having an opening 413 connected to an oxygen supply source or pipe 414. A second top late 415 is connected to the top plate 412 by means of bolt and IlUt fasteners 416.
A first oxygen pipe 417 communicates ~ith the supply source t~
pipe 414 through the plate 415.
A first upper connector plate assembly 41~ includ-es a plate 419 having a lower ilat sur~ace 420 and a down-wardly extending peripheral flange 421. The plate assembly 419 and top plate 415 have connected thereto a second pipe 422, to which a second water inlet connector 423 is connect-ed. A third water outlet pipe 424 is disposed outwardly of the second pipe and communicates a water outlet connection ~25.
A quick connect and disconnect clamping arrange-ment includes a pair of hlnged bolts 426 hingedly suspended from outwardly projecting bosses 427 provided on the third pipe 424.
The plate 419 of the first connector plate assembly 418 includes a central oxygen opening 428 through which the first oxygen pipe 417 projects. The plate 419, as best shown in FIG. 34, includes slots or ~irst openings 429 and 430 which are o~ arcuate shape, disposed in radially spaced rows to register~with slots in the lower connector plate assembly to be described. The slots 429 communicate with the water inlet connection 423 and second water inlet pipe 422.
The slots 430 communicate with the third water outlet pipe 424 which communicates with the water outlet connection 425.
second or lower connector plate assembly is de-signated at 431 and includes a sleeve 432 having an annular ~lange or plate 433 provided with an upper annular flat surface 434. The flat suriace 434 is provided with two rows oI circumferentially disposed second slots 435 and 436 rela-tively radially spaced with respect to each other. The de-~inition of "circumferentially spaced" as used in this .
.
descrip-tion is meant to include that the slots are spaced in a circle or annular, and that they are also disposed inwardly from the outer circumference o~ the lance. The slots are of arcuate shape and adjacent ends of the slots 35 and 36 provide solid radially extending circumferentially spaced solid webs 37 as best shown in FIGS. 36 and 37 which separate the adjacent slots.
As best shown in ~IG. 35, a ring plate 438 having a flat upper surface 439 conf'orms to the lower flat surface 440 of the plate or flange 433 and is connected thereto by screws 441.
- The second connector plate assembly 431 supports a fourth oxygen pipe 442, a fifth water inlet pipe 443, and a sixth water outlet pipe 444.
The water outlet pipe 444 has connected thereto wing projections~445 provided with slots 446 for receiving the bolt clamping members 426 in securing relation.
The pipes 442, 443 and 444 extend downwardly and are connected to a lance nozzle designated at ~47. The nozzle 447 of the present design includes a discharge orifice 448 communicating with a stub extension pipe 449 c~mmunicat-ing wit~h the oxygen pipe 442. The nozzle also includes a water outlet stub pipe 444' connected to the pipe 444. It ; also includes a stub pipe 443' connected to the lower end of pipe 443 to provide a mechanical slip joint therewith. As indicatecl at 450, baffle walls 451 are connected to the lower ends of the stub,pipe 443' to direct the incoming water from the inlet to the outlet pipes.
The present invention is particularly directed to the arrangement of the sealing and venting arrangements $~6~
disclosed.
As best shown in FIG. 35 and 36 the flat surface is provided with ring shaped grooves 452 within which seals in the ~orm of 0-rings 453 are secured. The 0-rings 453 ef~ectively seal the water inlet and water outlet passages from one another at the connection oi the flat surfaces of the connector plate assemblies. A vent space or annular chamber 454 is provided by the sleeve 432 and the outer waIl o~ the iirst oxygen pipe 417. The innermost 0-ring 453 seals this space 454 irom the water inlet slots 429 and 435.
The sleeve 432 projects downwardly and the lower oxygen pipe 442 is provided at its upper end with an enlarg-ed diameter tube or second sleeve 455 which at its upper end has a further enlarged outer diameter portion 456 which sup-ports two vertically spaced 0-rings 457 in sliding sealing contact with the inner wall o~ tlle sleeve 432.
The low0r end of the ~irst oxygen pipe 417 is provided with an enlarged outer diam~eter portion, or piston like element 458 having two 0-rings 459 vertically spaced relatively and iD sliding, sealing~ anù telescoping relation with the inner wall oi the second sleeve 455.
As best shown in FIGS. 34, 35, 36 and 37, vent bores or passages 460 are provided in the webs 437 and pro-jec-t radially horizontally outwardly. The peripheral flange 421 is provided with outlet bores 461 communicating with the passages 460 and the atmosphere.
The ring 438 and upper sur~ace 439 also incIude a cylindrical 0-ring 462.
As best shown in FIG. 35 the ~irst sleeve is pro-vided at its lower end with an annular inwardly extending ~3~
flange 470 which engages the projecting surface presented by the second sleeve 455 and which thus suspends the pipe 442 relative to the nozzle 447.
: As best shown in FIG. 38 the lower end of the suspended pipe 442 is in telescoping relation with the inner surface of the stub pipe 449 to provide a slip joint as in-dicated at 471.
Double annular O-rings 472 effectively seal the slip joint connection.
THE OPERATION
The operation o~ the lance disclosed is convention-al 1n that oxygen supplied from the supply pipe 414 flows downwardly through pipe 442, stub pipe 449 and through one or more discharge orifices ~48 into a basic.oxygen furnace ; vessel. Water flows from the water inlet connection 423 through arcuate passages 429 and 435 downwardly along pipe 443 to the lower end of the nozzle 447 to cool the same whereuponit is directed upwardly along pipe 444 through the slots 430 and 436 outwardly through the water outlet con-nection 425. Thus the lance no~zle is effectively cooled.
The present invention resides in the quick dis-.
connect and connect feature afforded by the ~irst and secondconnector assemblies with their unique disposition of the arcuate aligned slots when the assemblies are connected together in clamping relation. The unusual disposition of the O-rings in the flat contacting surfaces of the connector plates assures the positive sealing required to provide a quick clamp type disconnect arrangement. Thus the support assembly to which the upper co~lnector plate assembly is attached can remain in place on the support carriage which , ~ f~ f~
is provided adjacent a B.O.E. vessel and a lance can be replaced or interchanged within a short period. The support head can be used over and over again with new or repaired assemblies. Also no longer is it necessary to have t~o carriages adjacent to the vessel. By merely disconnecting the bolts~the lower connector assembly and major portion of the lance can be removed for repairs, replacement, transport or other service.
The present sealing arrangement and venting assures the continued operation without interruption o~ the oxygen blowing process. In disassembly of the lower connector plate from the upper, it is a simple matter to dlsconnect the same.
Upon disconnection the sleeve can readily be re- -placed by merely loosening the cap screws 41 and inserting a new sleeve. This assures interchangeability o~ parts and eliminates oversizing the 0-ring piston in the event of damage, and also the double 0-rings are also easily replaced.
In the present lance design the oxygen pipe 442 is suspended and supported on the sleeve 432 and during discon-nection of the sècond connector plate assembly this pipe can easily be removed and the lower seal member 472 replaced if desired, similarly, by providing a slip joint at the lower end of the oxygen pipe, the invention accomodates quick removal, repair, and replacement o~ the top assembly.
DESCRIPTION OF A FURTHER EMBODIMENT ~ -An oxygen lance assembly 510 comprises a top sup-port member 511 including a top plate 512 having an oxygen connector fitting 513 adapted to connect to an oxygen source.
An annular plate 514 is connected by means of bolts and nuts 515 to the plate 512. The annular plate 514 and a first connector plate assembly 516 have connected thereto a first oxygen pipe 517, a second inlet water pipe 518 and a third outlet water pipe 519. A water inlet connector 520 communicates with the pipe 518 and an outlet connection 521 communicates with the outlet pipe 519. The ~irst connector plate assembly 516 includes a flat plate 522 to which the lower ends of the pipes 517, 518 and 519 are connected. The plate 5~2 includes vertical circumferentially disposed ar-cuate slots 523 and 524. The term "circumferentially dispos-ed" means annulously positioned or positioned in ring_like manner. The slots are arcuate in shape and have adjacent ends positioned from other adjacent ends in laterally spaced i ~ .
relation.
A sec~nd connector plate assembly 525 includes a flat plate 526 having an upper flat surface 527 which includ-es slots 528 and 529 communicating with slots 523 and 524 respectively.
A fourth oxygen pipe 530 is connected to the plate 526 and communicates with the pipe 517 through opening 531 in plate 526 and opening 532 in plate 522. A fiith water inlet pipe 533 communicates with slots 528 and a sixth water outlet pipe 534 communicates with slots 529.
A nozzle for the lance is designated at 535 and includes an outlet orifice 536 communicating with an oxygen stub pipe 537 which at its upper end is in telescoping slip fit connection with the lower end of pipe 530. A pair of O-rings 538 in engagement with the oxygen stub pipe provide for sealing o~ the slip joint. A water chamber 539 is in communication with an inlet stub pipe 540 having a slip ~it relation with the lower ends 541 of the water inlet pipe.
~ 3~
The plate 522 is provided with a flat lower sur-face 542 and includes a peripheral flange 543 which extends around and overlaps the plate 526.
As indicated in FIG. 42 the inlet and outlet slots are of arcuate shape and adjacent ends of a pair of slots are separate by radially extending webs 544. A plur-ality of radially spaced O-rin~s 545, 546, are provided in suitable ring recesses inwardly o~ the slots 528. Another O-ring 547 is placed in a surface recess ring in the surface 527 between slots 528 and 529, aDd another O-ring 548 is . .
disposed outwardly of the slot 529 in a suitable O-ring recess. Thus al1 of the critical leakage areas are protect-ed by the O-rings described.
As best shown in ~IGS. 41 and 43, a vent passage 550 is provided ln each of the webs 544 and extend outwardly in the plate 526 to the atmosphere. The inward end of the vent passage is connected to a vertical bore 550 extendin~
to the surface 5~7 between the slots 545 and 546. Thus any leakage of oxygen or water is vented to the atmosphere.
Thus oxygen leaks cannot leak into water and water cannot leak into the oxygen.
~. ~
The quick connect disconnect arrangement ior the lance includes a pair of bosses 551 connected to pipe 5I9 which hingedly support bolts 552 having lower threads and nuts 553. Slotted keeper ears 554 aré supported on the pipe 534 and are adapted to securely clamp the connector plates in ~irm connected relation.
DETAILED DESCRIPT10~ OF A MODIFIED EMBODIMENT
FIG. 45 discloses a cross sectional view of a modified form o~ the invention wherein the san~e reference characters are appli0d $o similar parts. In this improve-- ment a separate ring 560 is connected to the upper ends at the pipes 533 and 534, said ring being attached to the plate 526 by means of cap screws 561. The ring is also provided with arcuate slots 562 communicating with slots 529 to direct water outwardly through said water outlet connector.
; THE OPERATION
The operation of directing oxygen and water through the lance is conventional. The improvement resides `in the arrangement of the upper and lower connector assem-blies with the slots which are placed in alignment or regis-try when the plates are connected in clamped relation by the improved clamping arrangement. By merely disconnecting the bolts the lower connector assembly and major portion of the lance can be removed for repairs, replacement, transport or other service; and similarly, by providing a slip joint at the lower end of the oxygen pipe, the invention accomodates ~quick removal, repair, and replacement o~ the tip assembly.
i~ Thus only one lance carria~e need be employed witll the top ., , support head remaining in posltion. O-rings and other parts can :be easily replaced. The slots are easily registerable and the vent arrangement is positive in the event leakage would occur.
.
.
DESCRIPTION OF THE PREFERRED EMBODIMENT
~ IGS. 1 and 3 disclose an improved lance 10 compri-sing a top support or head 11 including a top plate 12 having an opening 13 connectad to an oxygen supply source or pipe 14.
A second top plate 15 is connected to the top plate 12 by means of bolt and nut fasteners 16. A first oxygen pipe 17 communicates with the supply source pipe 14 through the plate 15.
A first upper connector plate assembly 18 includes a plate 19 having a lower flat sur~ace 20 and a downwardly extending peripheral flange 21. The plate assembly 19 and top plate 15 have connected thereto a second pipe 22, to which a second water inlet connector 23 is connected. A
third water outlet pipe 24 is disposed outwardly of the se-cond pipe and communicates a water outlet connection 25.
A quick connect and disconnect clamping arrangement includes a pair o~ hinged bolts 26 hingedly`suspended from outwardly projecting bosses 27 provided on the third pipe 24.
The plate 19 oi the first connector plate assembly 18 includes a central oxygen opening 28 throu~h which the iirst oxygen pipe 17 projects. The plate 19, as best shown in FIG. 3, includes slo-ts or first openings 29 and 30 which are oi arcuate shape, disposed in radially spaced rows to register with slots in the lower connector plate assembly to be described. The slots 29 communicate with the water inlet connection 23 and second water inlet pipe 22. The slots 30 communicate with the third water outlet pipe 24 which com-municates with the water outlet connec-tion 25.
A second or lower connector plate assembly is de-signated at 31 and includes a sleeve 32 having an annular f~
flange or plate 33 provided with an upper annular flat sur-face 34. The flat surface 34 is provided with two rows of circumferentially disposed second slots 35 and 36 relatively radially spaced witb respect to each other. The de~inition of "circumferentially spaced" as used in this description is meant to include that the slots are spaced in a circle or annulus, and that they are also disposed inwardly from the other circumference of the lance. The slots are of arcuate shape and adjacent ends of the lots 35 and 36 provide solid radially extending circumferentially spaced solid webs 37 as best shown in FIGS. 5 and 6 which separate the adjacent slots.
As best shown in FIG. 4, a ring plate 38 having a flat upper surface 39 conforms to the lower flat surface 40 of the plate or flange 33 and is connected thereto by screws 41.
The second connector plate assembly 31 supports a fourth oxygen pipe 42, a fifth water inlet pipe 43, and a sixth water outlet pipe 44.
The water outlet pipe 44 has connected thereto wing projections 45 provided with slots 46 for receiving the bolt clamping members 26 in securing relation.
The pipes 42, 43 and 44 extend downwardly and are connected to a lance nozzle designated at 47. The nozzle 47 of the present design includes a discharge orifice 48 com-municating with a stup extension pipe 49 communicating with the oxygen pipe 42. The nozzle also includes a water outlet stub pipe 44' connected to the pipe 44. It also includes a stub pipe 43' connected to the lower end of pipe 43 to pro-vide a mechanical slip joint therewith. As indica-ted at 50, 4~
Ba~fle walls 51 are connected to the lower ends of the stub pipe 43' to direct the incoming water irom the inlet to the outlet pipes.
The present invention is particularly directed to the arrangement of the sealing and venting arrangements dis-closed.
As best shown in FIG. 4 and 5 the flat surface is provided with ring shaped grooves 52 within which seals in the form of O-rings 53 are secured. The O-rings 53 ef~ect-ively seal the water inlet and water outlet passages from one another at the connection of the ~at sur~aces of the connector plate assernblies. At atmospheric or zero pressure vent space or annular chamber 54 is provided by -the sleeve 32 and the outer wall of the first oxygen pipe 17. The in-nermost O-ring 53 seals this space 54 ~rom the water inlet slot~ 29 and 35; however, in the event water should seep past the innermost O-ring 53, it will be safely vented from the lance.
The sleeve 32 projects downwardly and the lower oxygen pipe 42 is provided at its upper end with an enlarged dia7neter tube or second sleeve 55 which at its upper end has a ~urther enlarged outer diameter portion 56 which supports two vertically spaced O-rings 57 in sliding sealing contact with the inner wall o~ the sleeve 32.
The lower end o~ the ~irst oxygen pipe 17 is pro-vided with an enlarged outer diameter portion, or piston like element 58 having two O-rings 59 vertically spaced re-latively and in sliding, sealing, and telescoping relation with the inner wall o~ the second sleeve 55.
As best shown in FIG. 3, 4, 5 and 6, vent bores or _9..
passages 60 are provided in the webs 37 and project radially horizontally outwardly. The peripheral flange 21 is provid-ed with outlet bores 61 communicating with the passages 60 and the atmosphere. It should be noted that the bores 61 are shown to extend radially; however~ they may extend down-wardly to vent through the lower surface 21' of the peri-pheral flange 21.
The ring 38 and upper surface 39 also include a cylindrical 0-ring 62.
TflE OPERATION OF THE PREFERRED EMBOI)IMENT
The operation of the lance disclosed is convention-al in that oxygen supplied from the supply pipe 14 flows downwardly through pipe 42, stub pipe 49 and through one or more discharge orifices 48 into a basic oxygen furnace ves-sel. Water flows from the water inlet connection 23 through arcuate passages 29 and 35 downwardlg along pipe 43 to the lower end of the nozzle 47 to cool the same whereupon it is directed upwardly along pipe 44 through the slots 30 and 36 outwardly through the water outlet connection 25. Thus the lance nozzle is effectively cooled.
The present invention resides in the quick discon-nect and connect feature afforded by the first and second connector assemblies with their unique disposition of the arcuate aligned slots when the assemblies are connected to-gether in clamping relation. The unusual dispostion of the 0-rings in the flat contacting surfaces of the connector plates asssures the positive sealing required to provide a quick clamp type disconnect arrangement. Thus the support assembly to which the upper connector plate assembly is at-tached can remain in place on the support carriage which is provided adjacent a B.O.F. vessel ~nd a lance can be replac-ed or interchanged within a short period. The support head can be used over and over again with new or repaired assern-blies. The lance of the present design can be of shorter length and thus is easier to handle and transport.
The present sealing arrangement and venting assures the continued operation without interruption of the oxygen blowing process. In disassembly of the lower connector plate from the upper, it is a simple matter to disconnect the same.
Upon disconnection the sleeve can readily be re-placed by merely loosening the cap screws 41 and inserting a new sleeve. This assures interchangeability of parts and eliminates oversizing the O-,ring piston in the e~ent of da-mage~ and also the O-ring is easily replaced.
The arrangement of the sleeve 32 with the upper and lower oxygen pipe slip joint arrangement also provides an effective connection, to absorb the telescoping sliding movement of the pipes during expanslon and contraction caus-ed by high temperature variations.
THE ~ODI~IED EMBODIMENT
FIG. 7 and 8 disclose a modified top support arangement. Wherever the parts are the same as disclosed in the pre~erred embodiment the same reference characters are utilized.
In the modification a top support 70 includes an upper plate 71 having an oxygen inlet connection to which the oxygen pipe 17 (more elongated) is connected. A ring or flange 73 is connected to the plate 70 by means of bolts and nuts (not shown). A water inlet connection 74 is connected to an inlet water pipe 75. The inlet water pipe 75 has con-nected thereto a ring plate 76'to which is connected a con-nector ring 77 by suitable bolts and nuts (not shown). The water pipe 75 has a slip joint connection 76 with a short : . ~
water pipe section 77 to accommodate tempera-ture differen-tials between incoming and outgoing cooling water to prevent the deYelopment of excessive internal stresses. The short pipe section 77'is connected to the first connector plate assembly 18 and communicates with the arcuate slots 29 and 35. An outlet pipe 78 is also connected to the first upper connector plate assembly 18. A water outlet connection 79 discharges water from the outlet pipe 78.
The operation of the modification is similar to the preferred embodiment the primary di~ference being the vertical o~fset of the water inlet and outlet connections as well as the mechanical slip joint arrangement 76 which may be desired in some applications.
The unique sealing arrangement and the venting as-semblies are similar and the same advantages as enumerated beiore are achieved.
In both embodiments, water cannot leak into the oxygen pipes, nor can oxygen leak into the water pipes.
DESCRIPTION OF ALTERNATIVE EMBODIMENT
A lance 110 comprises a top support or head member 111, first and second connector assemblies 112 and 113, and a lance nozzle 114.
The head or support member 111 comprises a top plate 115 which supports the upper end of a first central oxygen pipe 116 communicating with an oxygen supply pipe connection 117. A connector plate 118 is connected to the plate 115 by means of bolts 119. A gas inlet connection 120 communicates with a second gas pipe 121 concentric with ox-ygen pipe 116. A third water inlet pipe 122 is concentric with the second pipe and a fourth water outlet pipe 123 con-centric with plpe 122, is in communication with a water out-let connection 124. A water inlet connection 125 provides water to the third pipe 122.
The first oxygen pipe 116 projects through an opening 126 provided in a plate 127 of the first connector plate assembly 112. The plate 127 includes an outer periph-eral downwardly projecting flange 127'. The second, third, and fourth pipes 121~ 122, and 123 are connected at their lower ends to the plate 127 and communicates with first gas, water inlet, and water outlet openings respectively 132, 133, and 134, The second connector assembly 113 comprises a flat plate 129 having a peripheral downwardly projecting flange 130. The first oxygen pipe 116 projlects through a central opening 131. The plate 129 includes a second gas opening 135, a water inlet opening 136, and water outlet opening 137 communicatingr with the first openings of plate 127. The second connector assembly lncludes a third plate or flange portion 138 which is connected to a sleeve 139. The third plate 138 includes three openings, respectively a gas open-ing 140, water inlet opening 141 and water outlet opening 142. All of the gas openings, water inlet openings, and outlet openings therefore are in communication in the con-nected assembly of the first and second connector plates.
The sleeve 139 includes an inner surface 143 spac~
ed from the outer surface o~ pipe 116 to provide an annular space 144 therebetween.
A fifth oxygen pipe 145 includes an upward piston portion 146 which includes spaced 0-rings 147 in relative sliding or slip joint engagement wi-th the inner surface 143 of sleeve 139. This telescoping or slip joint connector in-cludes a piston portion on the lower end of pipe 116 which includes 0-rings 148 in sliding engagement with the inner surface 149 of piston portion 146. The annular space 144 provides at its upper end a chamber communicating with a vent passage 150 extending outwardly horizontally in the flange plate 138 and communicating with the atmosphere through a connected passage 151 in the flange 130.
. ~
A second sleeve~ portion 152 on the sleeve 139 and plate 138 is concentric and spaced outwardly of sleeve 139.
The sleeve portion 152 includes an i,nner surface 153 which is engaged in slip joint relation by means of the upper end 154 of a lower sixth gas pipe 155 projecting downwardly to-ward the no~zle.
A connector ring 156 disposed below the fl~nge or plate 138 is connected thereto by bolts 157'. A lower se-venth water inlet pipe 158 and water outlet pipe 159 is con-nected to said ring 156. The connector ring 156 includes 0-rings 157 in engagement with the underneath surface of plate 138.
The upper end 154 of gas pipe 155 includes 0-ring seals 158. Referring now to FIG. 13 the openings 135, 136 and 137 are disclosed as individual rows of slots with ad-jacent ends o~ each slot in spaced relation relative to the other slots to provide a plurality o~ webs 160. O-rings 161, 162, 163 and 164 are disposed in suitable recess within the surface of plate 129 for sealing one row of arcuate slots from the other.
Referring now to FIG. 14, the openings 140, 1~1 and 142 are also of arcuate shape and adjacent opposite ends of each slot are spaced to provide solid portions or web.s 165 within which the vent passage 150 extend. The upper surfaces of' the sleeve flange or plate portion 138 also in-cludes 0-rings 166, 167, and 168 which are disposed between adjacent openingrs 142, 141, and 140 for sealing them against leakage.
The nozzle 114 includes a plurality of oriflces 170 at the lower ends of the pipe 145. The gas pipe 155 provides for the flow of gas with the oxygen as desired. The lower end of the water inlet pipe has a slip joint connection with an inlet pipe stub 171 and the water outlet pipe 159 is con-nected at its lower end to the gas pipe 155.
Quick disconnect o~ the connector plate assemblies is achieved by the hinged bolts 172 hinged on bases 173 sup-ported on the outer pipe 122. The bolts 172 and nuts 174 are adapted to engage slotted ears 175 mounted on the water outlet plpe 155 to clamp the connector plates in assembly and to quickly dlsconnect the source.
In the operation oxygen and gas can flow through the oxygen and gas pipes in conventional fashion. The in-vention is primarily in the connector plate assemblies, tbe disposition of the slots and the effective sealing arrange-ments provided by the 0-rings. The sleeves and plates of the second connector assembly can easily be dismounted and the sleeve replaced. The 0-rings can easily be replaced and provides an effective seal to prevent the mixture of oxygen with gas.
In the event of leakage the novel vent passage arrangement and its disposition provides for venting to the atmosphere.
The slip joint connections accomodate the expan-sion and contraction occasioned by high temperature varia-tions. Thus the present gas and oxygen lance can quickly be disconnected at the site, and the major portion of the lance can be removed for repairs, replacement, transport or other service and again assembled.
DESCRIPTION OF ANOTHER ~MBODIMENT
An oxygen lance assembly 210, includes a top'sup-port member 211 having an upper plate 211' connected to an oxygen sup'ply pipe 212. An annular plate 213 is connected to the plate 211' by means of bolts and nuts 214. The top support member may be rigidly mounted on a lance carriage (not shown) adapted to be moved for operation adjacent to a basic oxygen vessel. The support member 211 includes a first oxygen pipe 215 and second and~third water inlet and outlet pipes respectively 216 and 217. The outlet pipe 217 is connected to an outlet connector 219, and the inlet 216 ;
; is connected to an inlet connector 218.
An upper connector plate assembly is designated at~
220 and includes a flat plate 221 having a lower ~lat sur-face 222 provided with a central opening 223 communicating with the oxygen pipe 215. The flat plate 221 includes a plurality of circumferentially disposed arcuate slots 224 and 225 positioned in radially,space'd rows. The term "cir- -cumferentially disposed" for the present disclosure is to indicate that the slots above and hereafter further describ-ed are spaced in an annular ring like or cylindrical manner in the flat plates. The slots 224 and 225 communicate res-pectively with the water inlet and outlet pipes 216 and 217.
A second connector plate assembly 226 includes a sleeve 227 which projects downwardly and is provided with an upper bore 228 communicating with the opening 223 and the first oxygen pipe 215. The sleeve 227 includes an upper flange or annular plate 229 having two rows of radially spaced circumferentially disposed arcuate slots 230 and 231 respectively communicating with the arcuate slots 224 and 225. The upper flat surface 232 of the plate 229 is in seal-ing relation relative to the lower flat surface 222 by means of a pair of radially spaced annular 0-rings 233.
As best shown in ~IGS. 18 and 21, an annular cham-ber 266 communicating with the atmosphere through radial passages 267 is provided in the plate 221 between the 0-rings 233.
The upper connector plate assembly 220 includes a peripheral downwardly extending flange 234 overlapping the outer peripheral surface of the plate 229. The ~lange 23 lS releasably connected for replacement purposes to the lower surface 222 of the first connector plate assembly by means of cap screws 235, one of which is shown in FIG. 17.
The second connector plate assembly 226 includes a ring 236 having an annular inner surface 237 in telescoping engagement with the outer cylindrical surface 238 of the sleeve 227. The ring 236 includes an upper annular flat sur-face 239 in sealing engagement with the flat surface 232 of the plate 229. The ring includes a plurality of arcuate slots 2~0 and 241, communicating respectively with the slots 230 and 225 and slots 231 and 225.
The disposition of the circumferentially disposed slo-ts 240 and 241 is disclosed in FIGS. 19 and 20.
Each of the slots are circumferentially spaced to provide in the ring member 236 a plurality of radially ex-tending webs 2~2 which separate, or provide solid interveningr walls in said number 236.
Vent passages 243 are positioned within the webs 242 and extend outwardly for communication with the atmos-phere. The vent passages 243 communicate with a peripheral passage 243' and vent passages 243" in sleeve 227.
All o~ the slots in the ring 236, the plate 229 . ~
and the plate 221 are the same shape~and spacing and regis-ter with one another in the clamped or connected position of the lance assembly.
; As best shown in FIGS. 18 and 19, the upper flat surface of the ring 236 is provided with two annular rows of recesses 244 and 245 containing 0-rings 246 and 247 which ~` ~ are positioned adjacent the annular openings 240 and 241 to effectively seal against the leakage of water. The surface 237 and outer surface 238 of the sleeve are also ef~ectively : :
sealed by an O~ring 24$.
.
A lower fourth oxygen pipe 249 includes an upper enlarged piston-like member 250 in relative telescoping or slip joint connection with the inner annular surface 251 of the sleeve 227. Pairs o~ upper and lower 0-rings respective-ly 252 and 253 are supported on the member 250 and a vent chamber or annulous 25~ is provided in the member 250 which communicates with the bores or passages 243' and 243".
A fifth water inlet pipe 255 and sixth water inlet pipe 256 are connected to the ring 23G, project downwardly wi-th respect thereto and communicate wi-th the slots 241 and 240 respectively.
A lance nozzle 257 is welded to the lower pipes and includes an outlet orifice 258 communicating with an oxygen stub pipe 259 which communicates with the oxygen pipe 249. An outer stub pipe 260 is connected to the pipe 256.
The pipe 255 is in telescoping relation at its lower end with a stub pipe position 261 to provide a mechanical slip JOint connector therebetween. The telescoping relation of the fourth oxygen pipe with the sleeve 227 accommodates a relative sliding movement occurring when the pipe contracts and expands lengthwise due to heat variations. The sIip joint between pipe 255 and stub pipe 261 also provides for this occurrence.
FIG. 16 discloses the quick disconnect and connect and connect arrangement whic~h includes a pair of bosses 262 which are mounted on the pipe 217. Bolts 263 are hin~edly connected to the bosses 262 and are placed in clamping re-lation with slotted keeper members or ears 264 mounted on the rin~ 36 by means of nuts 265.
THE OPERATION
The flow of oxygen through the lance nozzle and water through the inlet pipe, water chamber of the nozzle and through the outlet pipes is conventional.
The unique features of the present invention reside in the quick disconnect o~ the main portion or barrel lance ~rom the top support member ~11 when the lance is to be ser~
viced and portions have to be replaced. Release of the swinging bolts 263 from the keeper 264 permits the lower por-r~
tion of the lance and lower pipes to be dropped downwardly whereupon access is easily provided to replace seals, etc., and to conduct other repairs. The sleeve 227 which may be o~ brass or similar material can easily be replaced by dis-connectingr the cap screws 235.
The arrangement disclosed provides ior effec-tive sealing of all areas where leakage is possible and any leak-age ~rom the oxygen pipes through the slip joint connector o~ the piston member 250, or of water from the inlet pipe 255> or of water or oxygen ~rom the connector assembly, is easily and safely vented into the atmosphere. Thus all im-'~ portant and necessary surfaces are effectively sealed.
Water cannot leak into the oxygen pipe nor can oxygen leak into the water pipes.
The circum~erential slots are easily and quicklyregistered upon reassembly o~ the lance.
DESCRIPTION OF A FURTHER EMBODIMENT
An oxygen lance 310 includes an upper head or support member 311, an upper and lou~er connector plate as-sembly 312 and 313 and a discharge nozzle 314 as best shown in FIG. 22.
The support member 311 is adapted to be rigidly connected to a lance carriage which supports the lance ad-jacent to a B.O.F. furnace in the steelmaking process. The head 311 includes a top plate 315, an attaching plate ring 316, connected by bolts 317 to the top plate 315.
A ~irst oxygen pipe 318 communicates with an ox- -ygen source 319 and is connected to the top plate 315 and to a ~irst connector plate assembly 320. The assembly 320 ~ ?~ J
includes a flat plate ~having a lower ilat surface 322.
~ L~ 9 The head further includes second water inlet and third water outlet concentric pipes respectively 323 and 324.
A water inlet connection 325 communicates with the inlet pipe 323 and outlet connection 326 communicates with the outlet pipe 324. The connector plate assembly 320 in-cludes a central oxygen opening 327 and is provided with a plurality of slots 328 and 329 supported on and through the plate 321. A second connector plate assembly 330 in-cludes a flat plate 331 having an upper flat surface 332 which engages the lower flat surface 322 in relative clamp-ing sealing relation. The plate 331 also includes openings or slots 333 and 334 respectively in registry with the slots 328 ~nd 329.
A ~ourth oxygen pipe 335 is connected to the plate 331 and a central opening 336 in the plate 331 com-municating with the first oxygen pipe 318. A fifth water inlet pipe 336' is supported on the plate 331 and a sixth water outlet pipe 337 is also supported on the plate 331.
The pipes are concentric and the water inlet pipe 336' com-municates with openings 328 and 333 and the water outlet pipe 337 communicates with openlng 329 and 334.
Figure 31:discloses the positioning of openings or slots 328 and 329. FIG. 30 discloses the positioning of~ the complementary slots 333 and 334 which register with slots 328 and 329. The slots disclosed are of arcuate formation, annularly7 or circumferentially spaced with their adjacent ends spaced horizontally to provide a plurality of spaced webs 338 in the plate 321, and 339, in the plate 331. The upper plate 321 also includes a peripheral downwardly extend-ing flange 336 overlapping the plate 331.
The plate 331 also includes four radially spaced ring grooves containing O-rings 340, 341, 342, and 343 to seal the flat surfaces of the upper and lower plates, and particularly the areas between the openings 333 and 334 and 328 and 329.
As best shown in FI&. 31 the plate 321 is provided with a plurality of vent passages 345 extending horizontally and then vertically as indicated at 346 through the flange 336" to the atmosphere. The inner ends of the passage end in a vent chamber 347 which communicates with a bore 348 ex-tending through the plate 331 whereupon it communicates with a shroud or vent pipe 349 having its upper end connected to a connector ring 350 which is also connected -to pipes 336' and 337. The connector ring 350 is connected to the plate 331 by means of cap screws 350' which are easily removable to disengage ring 350 from plate 331.
The upper ends of pipes 336', 337 and vent pipe 349 are connected to the ring 350 by welding. The shroud pipe 349 envelopes the oxygen pipe 335 and extends downward- :
ly adjacent the nozzle 314. The lower end o~ the pipe 335 is provided with an enlarged outer projecting sleeve or pis-ton member 351 which includes a pair of vertically spaced O~rings 352 engaging and sealing the lower end of the shroud pipe 349.
The nozzle includes an orifice 353, a stub oxygen pipe 354 having a reduced outer dlameter portion 354i which .-is in slip joint or telescoping relation with the piston member 351 at the oxygen pipe 335. The reduced diameter portion 354'includes two pairs of vertically spaced O-rings 355 and 356 engabring the piston portion 351 in sliding ~3~
sealing relation.
An annular vent chamber 357 between the O-rings 355 and 35G is in communication with a bore 358 which com-municates with the shroud pipe 349 venting leakage through the passages 348, 347, 345 and 346 to the atmosphere. Ver-tical contraction and expansion of the pipes 335 and 349 are achieved by the slip joint arrangement disclosed and which is occasioned by the variations in temperature. The nozzle 314 also includes a slip joint pipe stub 360, having a me-chanical slicing connection with the lower end of the inlet pipe 336'. An O-ring 367 on ring 350 adjacent the connec-tion of the shroud 349 to the ring is in seal relation with the plate 331.
, The quick connect and dlsconnect arrangement is disclosed in FIG. 23 and includes a pair of bosses 361 suppor ted on pipe 324 which hingedly support bolts 362 hav-ing nuts 363 thereon.
The ~olts 362 and nuts 3G3 engage slotted locking ears 364 to releasably lock the connector assemblies to-getber.
. .
DESCRIPTION OF ANOTHER EMBODIMENT
FIGS. Z7, 28, and 29 show another form o~ the ln-vention wherein the shroud pipe 349 at its upper end is slidingly connected to a sleeve 370 suitably connected to the ring 350. The sleeve 370 has its upper surface 371 in sealing enæagement by means of an O-ring 372. The upper end oi the shroud pipe 349 is provided with a piston end 373 having O-rings 374 in sliding relation with the sleeve 370.
The lower end of the oxygen pipe 335 is provided with an enlarged piston portion 376 in sliding relation with the -2~
stub pipe 354 alld having an annular venting groove or cham-ber 377 slidingly sealed against the stub pipe 354 by upper and lower O'ring pairs 352 and 356, respectively, and in-cluding a passage 378 communicating with the shroud pipe 349 which is secured to the upper portion oi the piston portion 376.
This arrangement again permits expansion and con-traction of the lower oxygen and vent pipes.
The same reference characters will apply where the parts are similar. Additional parts have above been addi-tionally identified.
In the present lnvention in both instnnces the lancesof both designs operate similarly in ~lowing oxygen to the nozzle. They are both of the quick disconnect type which can quickly be removed from the top support members for service. The venting arrangement provides for venting of the lowermost slip joint to vent any lealsage o~ oxygen and water while at the same time providing for quick removal, repair or replacement of the top assembly. The novel seal-ing arrangements are designed to prevent leakage of oxygen into the water or water into oxygen. If it does occur the novel vent arrangement disclosed will provide proper and immediate discharge to the atmosphere.
DESCRIPTION OF ANOTHER E~BODIM~NT
FIGS. 32 and 34 disclose an improved lance 410 comprising a top support or head 411 including a top plate 412 having an opening 413 connected to an oxygen supply source or pipe 414. A second top late 415 is connected to the top plate 412 by means of bolt and IlUt fasteners 416.
A first oxygen pipe 417 communicates ~ith the supply source t~
pipe 414 through the plate 415.
A first upper connector plate assembly 41~ includ-es a plate 419 having a lower ilat sur~ace 420 and a down-wardly extending peripheral flange 421. The plate assembly 419 and top plate 415 have connected thereto a second pipe 422, to which a second water inlet connector 423 is connect-ed. A third water outlet pipe 424 is disposed outwardly of the second pipe and communicates a water outlet connection ~25.
A quick connect and disconnect clamping arrange-ment includes a pair of hlnged bolts 426 hingedly suspended from outwardly projecting bosses 427 provided on the third pipe 424.
The plate 419 of the first connector plate assembly 418 includes a central oxygen opening 428 through which the first oxygen pipe 417 projects. The plate 419, as best shown in FIG. 34, includes slots or ~irst openings 429 and 430 which are o~ arcuate shape, disposed in radially spaced rows to register~with slots in the lower connector plate assembly to be described. The slots 429 communicate with the water inlet connection 423 and second water inlet pipe 422.
The slots 430 communicate with the third water outlet pipe 424 which communicates with the water outlet connection 425.
second or lower connector plate assembly is de-signated at 431 and includes a sleeve 432 having an annular ~lange or plate 433 provided with an upper annular flat surface 434. The flat suriace 434 is provided with two rows oI circumferentially disposed second slots 435 and 436 rela-tively radially spaced with respect to each other. The de-~inition of "circumferentially spaced" as used in this .
.
descrip-tion is meant to include that the slots are spaced in a circle or annular, and that they are also disposed inwardly from the outer circumference o~ the lance. The slots are of arcuate shape and adjacent ends of the slots 35 and 36 provide solid radially extending circumferentially spaced solid webs 37 as best shown in FIGS. 36 and 37 which separate the adjacent slots.
As best shown in ~IG. 35, a ring plate 438 having a flat upper surface 439 conf'orms to the lower flat surface 440 of the plate or flange 433 and is connected thereto by screws 441.
- The second connector plate assembly 431 supports a fourth oxygen pipe 442, a fifth water inlet pipe 443, and a sixth water outlet pipe 444.
The water outlet pipe 444 has connected thereto wing projections~445 provided with slots 446 for receiving the bolt clamping members 426 in securing relation.
The pipes 442, 443 and 444 extend downwardly and are connected to a lance nozzle designated at ~47. The nozzle 447 of the present design includes a discharge orifice 448 communicating with a stub extension pipe 449 c~mmunicat-ing wit~h the oxygen pipe 442. The nozzle also includes a water outlet stub pipe 444' connected to the pipe 444. It ; also includes a stub pipe 443' connected to the lower end of pipe 443 to provide a mechanical slip joint therewith. As indicatecl at 450, baffle walls 451 are connected to the lower ends of the stub,pipe 443' to direct the incoming water from the inlet to the outlet pipes.
The present invention is particularly directed to the arrangement of the sealing and venting arrangements $~6~
disclosed.
As best shown in FIG. 35 and 36 the flat surface is provided with ring shaped grooves 452 within which seals in the ~orm of 0-rings 453 are secured. The 0-rings 453 ef~ectively seal the water inlet and water outlet passages from one another at the connection oi the flat surfaces of the connector plate assemblies. A vent space or annular chamber 454 is provided by the sleeve 432 and the outer waIl o~ the iirst oxygen pipe 417. The innermost 0-ring 453 seals this space 454 irom the water inlet slots 429 and 435.
The sleeve 432 projects downwardly and the lower oxygen pipe 442 is provided at its upper end with an enlarg-ed diameter tube or second sleeve 455 which at its upper end has a further enlarged outer diameter portion 456 which sup-ports two vertically spaced 0-rings 457 in sliding sealing contact with the inner wall o~ tlle sleeve 432.
The low0r end of the ~irst oxygen pipe 417 is provided with an enlarged outer diam~eter portion, or piston like element 458 having two 0-rings 459 vertically spaced relatively and iD sliding, sealing~ anù telescoping relation with the inner wall oi the second sleeve 455.
As best shown in FIGS. 34, 35, 36 and 37, vent bores or passages 460 are provided in the webs 437 and pro-jec-t radially horizontally outwardly. The peripheral flange 421 is provided with outlet bores 461 communicating with the passages 460 and the atmosphere.
The ring 438 and upper sur~ace 439 also incIude a cylindrical 0-ring 462.
As best shown in FIG. 35 the ~irst sleeve is pro-vided at its lower end with an annular inwardly extending ~3~
flange 470 which engages the projecting surface presented by the second sleeve 455 and which thus suspends the pipe 442 relative to the nozzle 447.
: As best shown in FIG. 38 the lower end of the suspended pipe 442 is in telescoping relation with the inner surface of the stub pipe 449 to provide a slip joint as in-dicated at 471.
Double annular O-rings 472 effectively seal the slip joint connection.
THE OPERATION
The operation o~ the lance disclosed is convention-al 1n that oxygen supplied from the supply pipe 414 flows downwardly through pipe 442, stub pipe 449 and through one or more discharge orifices ~48 into a basic.oxygen furnace ; vessel. Water flows from the water inlet connection 423 through arcuate passages 429 and 435 downwardly along pipe 443 to the lower end of the nozzle 447 to cool the same whereuponit is directed upwardly along pipe 444 through the slots 430 and 436 outwardly through the water outlet con-nection 425. Thus the lance no~zle is effectively cooled.
The present invention resides in the quick dis-.
connect and connect feature afforded by the ~irst and secondconnector assemblies with their unique disposition of the arcuate aligned slots when the assemblies are connected together in clamping relation. The unusual disposition of the O-rings in the flat contacting surfaces of the connector plates assures the positive sealing required to provide a quick clamp type disconnect arrangement. Thus the support assembly to which the upper co~lnector plate assembly is attached can remain in place on the support carriage which , ~ f~ f~
is provided adjacent a B.O.E. vessel and a lance can be replaced or interchanged within a short period. The support head can be used over and over again with new or repaired assemblies. Also no longer is it necessary to have t~o carriages adjacent to the vessel. By merely disconnecting the bolts~the lower connector assembly and major portion of the lance can be removed for repairs, replacement, transport or other service.
The present sealing arrangement and venting assures the continued operation without interruption o~ the oxygen blowing process. In disassembly of the lower connector plate from the upper, it is a simple matter to dlsconnect the same.
Upon disconnection the sleeve can readily be re- -placed by merely loosening the cap screws 41 and inserting a new sleeve. This assures interchangeability o~ parts and eliminates oversizing the 0-ring piston in the event of damage, and also the double 0-rings are also easily replaced.
In the present lance design the oxygen pipe 442 is suspended and supported on the sleeve 432 and during discon-nection of the sècond connector plate assembly this pipe can easily be removed and the lower seal member 472 replaced if desired, similarly, by providing a slip joint at the lower end of the oxygen pipe, the invention accomodates quick removal, repair, and replacement o~ the top assembly.
DESCRIPTION OF A FURTHER EMBODIMENT ~ -An oxygen lance assembly 510 comprises a top sup-port member 511 including a top plate 512 having an oxygen connector fitting 513 adapted to connect to an oxygen source.
An annular plate 514 is connected by means of bolts and nuts 515 to the plate 512. The annular plate 514 and a first connector plate assembly 516 have connected thereto a first oxygen pipe 517, a second inlet water pipe 518 and a third outlet water pipe 519. A water inlet connector 520 communicates with the pipe 518 and an outlet connection 521 communicates with the outlet pipe 519. The ~irst connector plate assembly 516 includes a flat plate 522 to which the lower ends of the pipes 517, 518 and 519 are connected. The plate 5~2 includes vertical circumferentially disposed ar-cuate slots 523 and 524. The term "circumferentially dispos-ed" means annulously positioned or positioned in ring_like manner. The slots are arcuate in shape and have adjacent ends positioned from other adjacent ends in laterally spaced i ~ .
relation.
A sec~nd connector plate assembly 525 includes a flat plate 526 having an upper flat surface 527 which includ-es slots 528 and 529 communicating with slots 523 and 524 respectively.
A fourth oxygen pipe 530 is connected to the plate 526 and communicates with the pipe 517 through opening 531 in plate 526 and opening 532 in plate 522. A fiith water inlet pipe 533 communicates with slots 528 and a sixth water outlet pipe 534 communicates with slots 529.
A nozzle for the lance is designated at 535 and includes an outlet orifice 536 communicating with an oxygen stub pipe 537 which at its upper end is in telescoping slip fit connection with the lower end of pipe 530. A pair of O-rings 538 in engagement with the oxygen stub pipe provide for sealing o~ the slip joint. A water chamber 539 is in communication with an inlet stub pipe 540 having a slip ~it relation with the lower ends 541 of the water inlet pipe.
~ 3~
The plate 522 is provided with a flat lower sur-face 542 and includes a peripheral flange 543 which extends around and overlaps the plate 526.
As indicated in FIG. 42 the inlet and outlet slots are of arcuate shape and adjacent ends of a pair of slots are separate by radially extending webs 544. A plur-ality of radially spaced O-rin~s 545, 546, are provided in suitable ring recesses inwardly o~ the slots 528. Another O-ring 547 is placed in a surface recess ring in the surface 527 between slots 528 and 529, aDd another O-ring 548 is . .
disposed outwardly of the slot 529 in a suitable O-ring recess. Thus al1 of the critical leakage areas are protect-ed by the O-rings described.
As best shown in ~IGS. 41 and 43, a vent passage 550 is provided ln each of the webs 544 and extend outwardly in the plate 526 to the atmosphere. The inward end of the vent passage is connected to a vertical bore 550 extendin~
to the surface 5~7 between the slots 545 and 546. Thus any leakage of oxygen or water is vented to the atmosphere.
Thus oxygen leaks cannot leak into water and water cannot leak into the oxygen.
~. ~
The quick connect disconnect arrangement ior the lance includes a pair of bosses 551 connected to pipe 5I9 which hingedly support bolts 552 having lower threads and nuts 553. Slotted keeper ears 554 aré supported on the pipe 534 and are adapted to securely clamp the connector plates in ~irm connected relation.
DETAILED DESCRIPT10~ OF A MODIFIED EMBODIMENT
FIG. 45 discloses a cross sectional view of a modified form o~ the invention wherein the san~e reference characters are appli0d $o similar parts. In this improve-- ment a separate ring 560 is connected to the upper ends at the pipes 533 and 534, said ring being attached to the plate 526 by means of cap screws 561. The ring is also provided with arcuate slots 562 communicating with slots 529 to direct water outwardly through said water outlet connector.
; THE OPERATION
The operation of directing oxygen and water through the lance is conventional. The improvement resides `in the arrangement of the upper and lower connector assem-blies with the slots which are placed in alignment or regis-try when the plates are connected in clamped relation by the improved clamping arrangement. By merely disconnecting the bolts the lower connector assembly and major portion of the lance can be removed for repairs, replacement, transport or other service; and similarly, by providing a slip joint at the lower end of the oxygen pipe, the invention accomodates ~quick removal, repair, and replacement o~ the tip assembly.
i~ Thus only one lance carria~e need be employed witll the top ., , support head remaining in posltion. O-rings and other parts can :be easily replaced. The slots are easily registerable and the vent arrangement is positive in the event leakage would occur.
.
.
Claims (9)
1. A steel making lance assembly comprising a top support member, said support member including a first central oxygen supply pipe, and second and third water inlet and outlet pipes, a first connector plate assembly on said top support member, said first plate assembly having a lower flat surface including a central opening communicating with said first supply pipe, said lower surface including a plurality of first openings communicating with said second and third pipes, a second connector plate assembly, said second connector plate assembly including a flat upper surface including a second central opening registering with said first central opening, said flat upper surface including a plurality of second openings registering with said first circumferential open-ings, a fourth oxygen pipe having an upper end portion communicating with said second central opening and said first oxygen pipe, fifth and sixth water inlet and outlet pipes connected to said second connector plate assembly and communicating with said second open-ings means quick releasably connecting said first and second con-nector plate assemblies whereby said openings in said flat surfaces are clamped in registering relation, a lance nozzle connected to said fourth, fifth and sixth pipes including a water chamber com-municating with said fifth and sixth pipes, a discharge orifice, an oxygen pipe stub on said nozzle communicating with said orifice, said pipe stub and the lower portion of said fourth oxygen pipe being positioned in relative telescoping sliding relation, and a vent passage in one of said connector plate assemblies, said vent terminating at one end of said flat upper surface of said second connector plate assembly.
2. The invention in accordance with Claim 1, said vent passage being provided in said first connector plate assembly.
3. The invention in accordance with Claim 2, said vent extending horizontally to one peripheral end of said first con-nector plate assembly.
4. The invention in accordance with Claim 1, said open-ings in said first flat lower surface being of arcuate configura-tion and terminating at their ends in spaced relation to provide spaced webs therebetween, and said vent passage being disposed in said spaced webs.
5. The invention in accordance with Claim 1, said first connector plate assembly having a downwardly projecting peripheral flange overlapping said second connector plate assembly.
6. The invention in accordance with Claim 1, said open-ings comprising a plurality of radially spaced concentric slots.
7. The invention in accordance with Claim 1, said open-ings in said flat surfaces of said plate assemblies being of ar-cuate configuration and having their ends in spaced relation to provide intervening webs circumferentially spaced, and a vent passage terminating at one of said flat surfaces between said inlet and water passages and extending horizontally through certain of said webs to the atmosphere.
8. The invention in accordance with Claim 1, including means removably connecting said fifth and sixth pipes to said second plate assembly.
9. The invention in accordance with Claim 8, said means comprising a ring connecting member rigidly connected to upper ends of said fifth and sixth pipes, and screw-type fastener means connecting said connector member to said second plate assembly.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA375,036A CA1125016A (en) | 1977-05-09 | 1981-04-08 | Oxygen lance assembly |
| CA375,038A CA1125018A (en) | 1977-05-09 | 1981-04-08 | Oxygen lance assembly |
| CA375,037A CA1125017A (en) | 1977-05-09 | 1981-04-08 | Oxygen lance assembly |
| CA375,039A CA1125019A (en) | 1977-05-09 | 1981-04-08 | Oxygen lance assembly |
| CA375,035A CA1123599A (en) | 1977-05-09 | 1981-04-08 | Oxygen lance assembly |
Applications Claiming Priority (12)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US795,247 | 1977-05-09 | ||
| US795,243 | 1977-05-09 | ||
| US05/795,248 US4083544A (en) | 1977-05-09 | 1977-05-09 | Oxygen lance assembly |
| US795,245 | 1977-05-09 | ||
| US05/795,247 US4083543A (en) | 1977-05-09 | 1977-05-09 | Oxygen lance assembly |
| US05/795,244 US4083540A (en) | 1977-05-09 | 1977-05-09 | Gas and oxygen steel making lance |
| US795,244 | 1977-05-09 | ||
| US795,246 | 1977-05-09 | ||
| US05/795,245 US4083541A (en) | 1977-05-09 | 1977-05-09 | Oxygen lance assembly |
| US795,248 | 1977-05-09 | ||
| US05/795,243 US4083539A (en) | 1977-05-09 | 1977-05-09 | Oxygen lance assembly |
| US05/795,246 US4083542A (en) | 1977-05-09 | 1977-05-09 | Oxygen lance assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1103449A true CA1103449A (en) | 1981-06-23 |
Family
ID=27560297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA299,028A Expired CA1103449A (en) | 1977-05-09 | 1978-03-14 | Oxygen lance assembly |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS53141108A (en) |
| AT (1) | ATA263578A (en) |
| AU (1) | AU525835B2 (en) |
| CA (1) | CA1103449A (en) |
| DE (1) | DE2816399C2 (en) |
| GB (1) | GB1598740A (en) |
| IT (1) | IT1102837B (en) |
| LU (1) | LU79498A1 (en) |
| MX (1) | MX148009A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4767598A (en) * | 1986-09-22 | 1988-08-30 | Aluminum Company Of America | Injection apparatus for introduction of a fluid material into a molten metal bath and associated method |
| JPH02135344U (en) * | 1989-04-18 | 1990-11-09 | ||
| DE19541199C2 (en) * | 1995-11-04 | 2001-05-23 | Thyssen Stahl Ag | Changing device for a blowing lance |
| US6139792A (en) * | 1997-02-07 | 2000-10-31 | Kvaerner Davy Ltd. | Exchange of an oxygen lance for liquid steel conversion |
| CN112683074A (en) * | 2020-12-16 | 2021-04-20 | 铜陵德兴机械制造有限责任公司 | Top-blown furnace spray gun and special maintenance method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU52104A1 (en) * | 1966-10-04 | 1968-05-07 | ||
| DE1265179B (en) * | 1961-11-16 | 1968-04-04 | Koppers Co Inc | Lance for blowing gas into a refining bath for metal |
| GB1320680A (en) * | 1971-07-26 | 1973-06-20 | Berry Metal Co | Easily repairable gas injection lance |
| US3823929A (en) * | 1973-09-13 | 1974-07-16 | Berry Metal Co | Nozzle for fuel and oxygen lance assembly |
| US3827632A (en) * | 1973-09-13 | 1974-08-06 | Berry Metal Co | Fuel and oxygen lance assembly |
| LU69797A1 (en) * | 1974-04-05 | 1974-11-21 |
-
1978
- 1978-03-14 CA CA299,028A patent/CA1103449A/en not_active Expired
- 1978-03-16 GB GB10564/78A patent/GB1598740A/en not_active Expired
- 1978-04-14 AT AT0263578A patent/ATA263578A/en not_active Application Discontinuation
- 1978-04-15 DE DE2816399A patent/DE2816399C2/en not_active Expired
- 1978-04-21 LU LU79498A patent/LU79498A1/en unknown
- 1978-04-27 MX MX173259A patent/MX148009A/en unknown
- 1978-05-05 AU AU35818/78A patent/AU525835B2/en not_active Expired
- 1978-05-09 IT IT49259/78A patent/IT1102837B/en active
- 1978-05-09 JP JP5415678A patent/JPS53141108A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6211048B2 (en) | 1987-03-10 |
| IT7849259A0 (en) | 1978-05-09 |
| AU3581878A (en) | 1979-11-08 |
| JPS53141108A (en) | 1978-12-08 |
| DE2816399A1 (en) | 1978-11-23 |
| GB1598740A (en) | 1981-09-23 |
| AU525835B2 (en) | 1982-12-02 |
| MX148009A (en) | 1983-02-22 |
| IT1102837B (en) | 1985-10-07 |
| LU79498A1 (en) | 1978-11-28 |
| DE2816399C2 (en) | 1985-05-02 |
| ATA263578A (en) | 1983-04-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry | ||
| MKEX | Expiry |
Effective date: 19980623 |