CA1099393A - Method and apparatus for inspecting refractory lining in coke oven chambers and the like - Google Patents
Method and apparatus for inspecting refractory lining in coke oven chambers and the likeInfo
- Publication number
- CA1099393A CA1099393A CA261,639A CA261639A CA1099393A CA 1099393 A CA1099393 A CA 1099393A CA 261639 A CA261639 A CA 261639A CA 1099393 A CA1099393 A CA 1099393A
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- Canada
- Prior art keywords
- chamber
- enclosure
- camera
- refractory lining
- video signal
- Prior art date
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Abstract
METHOD AND APPARATUS FOR INSPECTING
REFRACTORY LINING IN COKE OVEN
CHAMBERS AND THE LIKE
ABSTRACT OF THE DISCLOSURE
The refractory lining of a high temperature chamber such as a coke over chamber is inspected after a coke pushing operation and before coal is charged into the chamber by using a pusher ram to move a television camera located within an enclosure having water cooling pipes in the side walls thereof to provide a thermally-protective environment for the camera. The lens for the camera which projects from a side wall of the enclosure is air-cooled. The enclosure for the camera is rotatably positioned and vertically displaced relative to an L-shaped bracket used to support the enclosure upon the coke engaging end of the pusher ram. In addition to displaying the video signal produced by the camera on a monitor, the video signal is also recorded to evaluate the surface condition of the refractory lining at a later period of time.
REFRACTORY LINING IN COKE OVEN
CHAMBERS AND THE LIKE
ABSTRACT OF THE DISCLOSURE
The refractory lining of a high temperature chamber such as a coke over chamber is inspected after a coke pushing operation and before coal is charged into the chamber by using a pusher ram to move a television camera located within an enclosure having water cooling pipes in the side walls thereof to provide a thermally-protective environment for the camera. The lens for the camera which projects from a side wall of the enclosure is air-cooled. The enclosure for the camera is rotatably positioned and vertically displaced relative to an L-shaped bracket used to support the enclosure upon the coke engaging end of the pusher ram. In addition to displaying the video signal produced by the camera on a monitor, the video signal is also recorded to evaluate the surface condition of the refractory lining at a later period of time.
Description
~ 3 METHOD-AND APP~RATUS F~R INSPECTING
REFRACTO~Y LINING IN COKE OVEN
CHAMBERS AND THE LIKE
B~CKGROUND OF T~IE INYENTION
This inven~ion relates to a method and apparatus for inspectiorl o~ ~he re~rac~ory lining of a high t~mperature chamber ~uch as is commonly ~mployed in coking chambers of a bat~ery of colce oveels, pneumatic steel treatment vessels, reheat furnaces for metallic workpie~es and the like~ More particularly, ~he present invention is addressed to the inspection of such a refractory lining while at a highly hea~ed state by transmitting video sig~al5 to a remote locaeion produced by a televisio~ camera ~hat is moved along such refractory lining while the camera is located wi~hin a ~hermally-protec~ive environmen~ formed by an enclosure~ :
A typical coklng chamber in a co~e oven ba~tery o~ present-day designs is approximately 2 ee~ wide, 12 to 18 ~eet high and 40 to 60 feet~long. In a coke oven bat~
tery~ the coking chambers ~cept those at ea~h end of the battery have a coking chamber at each side thereo. When a given coking chamber is pushed, ~h~ adjacent ~oking chambers at each side thereof ha~e coal ~harg~s that have been advanced pproximately midway througb the coking 3~
process. While inspec~ion o:f the refractory lining of a coking chamber is ex~remely important7 ic must be carried ou~ within a relatively short p~riod of time to not only minimize production losses but also to avoid critîcal tem-perature imbalances partieularly s ince there is an empty coke oven chamber having side wal-ls which are an intQgral part of the heating flues employed to heat ~he adjacent coking chambers.
Presently, the inspection of a coking chamber takes place immediately ater the coke has been pushed into a transfer car at the coke side by a ram supported a~ the machine side. An inspeetor then views ~he emptied oven ch~mber from either the coke side or the machine side. The time available to the inspector for viewing the refractory lining is usually very short because the inspector is exposed ~o intense thermal radia~on from the oven. In this respect~ a coking chamber is heated ~o relatively high temperatures and within the rangP of 1200F to ~100E'. The inspector, therefore, quîckly vîews the înternal refrac~ory surface o~ the oven chamber to observe any deterloration of the reractory surace. The conditîon of the refractory surface is usually deæcribed in writing after the inspection by its appearance to the i.ndividual inspector. Such an înspection procedure is critically dependent upon the experience o~ the inspector and his ability to de~crib~ in
REFRACTO~Y LINING IN COKE OVEN
CHAMBERS AND THE LIKE
B~CKGROUND OF T~IE INYENTION
This inven~ion relates to a method and apparatus for inspectiorl o~ ~he re~rac~ory lining of a high t~mperature chamber ~uch as is commonly ~mployed in coking chambers of a bat~ery of colce oveels, pneumatic steel treatment vessels, reheat furnaces for metallic workpie~es and the like~ More particularly, ~he present invention is addressed to the inspection of such a refractory lining while at a highly hea~ed state by transmitting video sig~al5 to a remote locaeion produced by a televisio~ camera ~hat is moved along such refractory lining while the camera is located wi~hin a ~hermally-protec~ive environmen~ formed by an enclosure~ :
A typical coklng chamber in a co~e oven ba~tery o~ present-day designs is approximately 2 ee~ wide, 12 to 18 ~eet high and 40 to 60 feet~long. In a coke oven bat~
tery~ the coking chambers ~cept those at ea~h end of the battery have a coking chamber at each side thereo. When a given coking chamber is pushed, ~h~ adjacent ~oking chambers at each side thereof ha~e coal ~harg~s that have been advanced pproximately midway througb the coking 3~
process. While inspec~ion o:f the refractory lining of a coking chamber is ex~remely important7 ic must be carried ou~ within a relatively short p~riod of time to not only minimize production losses but also to avoid critîcal tem-perature imbalances partieularly s ince there is an empty coke oven chamber having side wal-ls which are an intQgral part of the heating flues employed to heat ~he adjacent coking chambers.
Presently, the inspection of a coking chamber takes place immediately ater the coke has been pushed into a transfer car at the coke side by a ram supported a~ the machine side. An inspeetor then views ~he emptied oven ch~mber from either the coke side or the machine side. The time available to the inspector for viewing the refractory lining is usually very short because the inspector is exposed ~o intense thermal radia~on from the oven. In this respect~ a coking chamber is heated ~o relatively high temperatures and within the rangP of 1200F to ~100E'. The inspector, therefore, quîckly vîews the înternal refrac~ory surface o~ the oven chamber to observe any deterloration of the reractory surace. The conditîon of the refractory surface is usually deæcribed in writing after the inspection by its appearance to the i.ndividual inspector. Such an înspection procedure is critically dependent upon the experience o~ the inspector and his ability to de~crib~ in
-2-
3~3 term~ meaningful to others exactly what he~ in fact,observed during t~e relatively shor~ inspection period~
Moreover9 this inspection procedure is further complicated by optical refraction caused by hot gases wi~hin the coking chamber during the inspec~ion viewing period. Thus~
extremely important information for ti~ely maintenance and pollutant-free operation of a coke oven bat~ery is presently compiled in a very rudimentary manner. While the foregoing descrlption has been addre~sed to the problems and diffi-culties associated wi~h the inspection of a refrac~ory sur-face of a coke oven chamber, the present invention is equally applicable ~o the inspe~ion o the ref~actory lining of other chambers including but not limîted to ves-seLs for pneumatic steel refining, furnace~ ~or reheating metallic workpieces and the like.
SUP~ RY OF TH~ INVENTION
It is an object of the present invention to provide an in~pection method and apparatus for viewing the internal reractory surface of a chamber while at a rela-tively high temperature in a manner which will:materiallyreduce ~he time required for such inspection while providing more accurate and detailed inspection information regarding the condit~on o~ the refractory surface~.
It i8 a ~urther object~of the present in~ention to provide a method and apparatus for inspecting the rerac- -tory lining of a high temperature chamber by moving a -3~
3~
televisi~n camera in spaced-apart relation along the refractory lining while the camera is located within a thermally-protective environment provided by an enclosure that includes means for cooling the optical lens of the camera and in a manner whereby the camera is remotely positioned and controlled at a location which preferably includes a television monitor for the immediate viewing of the video signal produced by the television camera.
It is another object of the present invention to provide an inspection method and apparatus including a television camera arranged within a thermally-protective environment provided by a water-cooled enclosure that i$
rotatably and linearly displaced while carried by a movable support member.
More specifically, according to the present invention, there is provided an inspection apparatus for inspecting the refractory lining in a high temperature chamber of a coke oven, a pneumatic steel treatment vessel, a reheat furnace for metallic workpieces and the like before and/or after treating the burden therein, the apparatus including the combination of:
a movable member to advance within the chamber in a direction along the refractory lining thereof, support means externally of the chamber to carry the movable member, an enclosure including side walls normally forming a substantially closed compartment, the enclosure being supported by the movable member for movement within the chamber, the enclosure including means for maintaining a thermally-protective environment within the compartment thereof, drive means coupled to the movable member to displace Jl/\~
,.,~, . ~ . .
3~3 the enclosure along the refractory l~ning of the chamber9 means carried within the compartment of the enclosure for producing a video signal corresponding to at least a portion of the refractory lining, the means including an optical lens exposed to the ~efractory lining through an - opening in the side wall of the enclosure, means for cooling the optical lens, means supported by the movable member to adjustably : position the means for producing a video signal, and receiver means for displaying the video signal produced by the first means and corresponding to at least a portion of the refractory lining.
The present invention also broadly provides a method for inspecting the refractory lining of a high ~emperature chamber in a coke oven, a Pneumatic s~eel treatment vessel, a reheat furnace for metallic workpieces and the like before and/or after treating the burden therein, the method including the steps of:
producing:a thermally-protective environment for a televisio;n camera which includes cooling the optical lens of the camera, supporting the thermally-protected television camera externally of the high temperature chamber for adjustable movement of the camera within the chamber, displacing the thermally-protected television camera in a spaced-apart location along the refractory lining within the high temperature chamber only when the chamber is void of a burden, transmitting a video signal corresponding to a first side wall portion of the refractory lining to a location external of the high temperature chamber by directing the lens for the camera toward the refractory lin-ing, ~lt~ ~5~
;. . ~
.
3~
displaying the video signal on a television receiver means, repositioning the thermally-protected camera and thereafter transmitting a video signal from within the high temperature chamber corresponding to a second side wall portion of the refractory lining to a location external of the high temperature chamber, and displaying the video signal corresponding to the second side wall portion of the refractory lining on a television receiver means.
The method of the present invention is further characterized by recording the video signal provided by the ~ 5a-3~93 television camera on a magnetic storage medium doring each one of a plurali~y o~ successive periods between operation of the high temperature chamber.
Thes~ features and advantages of the present inven~ion as well as o~hers will be moxe readily understood when the following descrip~ion is read in light of the accompanyi~g drawings~ in which;
Figure 1 is an elevational vlew, in section, o a typical coke oven chamber to undergo inspec~ion according to the method and apparatus of ~he present inven~ion;
Fig. 2 is a plan view~ in section, of the inspection appara~us according ~o the present invention;
Fig. 3 is an elevational ~iew of the inspection apparatus shown in Fig~ 2;
Fig. 4 is a plan view similar to Fig~ 2 but illustrating modifications to the insp ction apparatus according to ~he present invention;
Fig. S is a sectional view taken along line V-V
of Figo 4, and Fig. 6 is an elevational view of a further embodi-ment of the inspection apparatus according to the presentinvention.
Fig. 1 illustrates a coking chamber 10 which e~tends in a generall~ horizontal direction ~nd forms one of a plurality of spaced~apart and side-by-side coking chambers in a coke oven battery. The coki~g chamber 10 includes a refrac~ory hearth 11 located abo~e generators 12 used for .. . . .
3~33 regeneratively heating the coking chamber in a manner which is well known in the art~ The chamber 10 is closed a~ its opposite ends by removable doors, not showrl. The coking chamber has vertical sid~ walls 13 formed by courses o refractory brick or other forms of refractory material used to transmit heat from heating flues that extend between adjacent oven chambers. A roof 14, also made of refrac~ory material, has charging openings 15 for feeding coal into the oven chamber from a coal chsrging car mo~abLe along 10 the oven roof. A coke bench 16 is located above the ground floor at the coke side of the oven. The coke bench 16 - includes rails ~or suppoxting a coke guide machine, not shown, to guide ~he mass of coke pushed from the oven ohamber into a soke transfer car after positioning along rails 17 at the ~oke side of ~he oven cham~er~ At the machine side of the coking ehamber, w~ich is opposite the coke side, ~here is provided rails which carry a pushing machine 1~ that includes a ram 19 and a drive ha~ing a motor 20 to move a ram plate 21 into engagement with the mass of coke in the oven chamber. The ram is usually con-stru~ted in a manner such ~hat the coke engaging face of the ram is hori~ontally displaced in ~he coke chamber to the coke side thereof. The pusher machine al~o includes a leveling bar 22 used in a well-known manner to level a coal charge in an oven chamber.
Turning, now~ to Figs. ~ and 3~ according to -7- :
3~3 the present inven~ion ~he ram 19 is used to suppor~ and traverse a television camera 30 within the coking chamber for inspec~ion oE ~he re~rac~ory lining thereof while in a highly heated stateO Typically, the inspec~ion operation is carried ou~ immediately af~er a soke pushing ope~ationO The camera is protected from the adverse environment within the coking chamber~ particularly ~he high temperature that may be of the order of 2200DF during ~his period of time. The television cæmera is per se well known in the art. The camera has a rem~tely con~rollable zoom-type lens 30A that is surrounded by a pipe 31 coupled to an airline 32 for discharging air through openings in the side walls of the pipe to cool the lens. The television camera is supported within a box-like enclosure 33 that includes side walls containing spaced~apart and parallel fluid conduc~ing pipes or lines 33A that communicate with similar fluid conducting lines in the top and floor walls. The lines 33A recei~e and discharge coolan~ water conducted by lines 34 tha~
extend internally along a trunnion shaft 35 to a rotary union 34A. ~ther supply lines, not shown, are connected to the rotaxy union and ext nd along the ram 19 to the pushing machine.
The trunnion shaft 35 is rotatably suppor~ed ~y bearings carried in a bearing block 36 that is, in tur~
supported by carrier anms 37. The carrier arms are received between guide plates forming part of an L~shaped ., .. . ..
~ 3~ 3 support member 38~ The carrier arms 37 have threaded bores that receive threaded shafts 39 ~hat are ro~a~ed by sprocket wheels 39A coupled by a chain drive mo~or 40 carried by support member 38. The mo~or is employed ~o rotate shafts 39 which, in turn, displaee ~he carrier arms 37 and trunnion shaft 35. In ~his way, the television camera is movably positioned vertically along the face-plate 21 o~ the ramO The L-shaped support member 38 includes a spring-biased plunger 41 adapted to engage the back sur-face of the pusher pla~e of the arm, as clearly shown in Fig~ 3. The top member of the L-shaped support member is supported directly upon the top surface of the pusher plate.
The L~shaped support member is removably supported by the ram and held in an outwardly-spaced relation from the face ; of the pusher plate by a spacer foo~ 42Q
The enclosure 33 is rotatably positioned abou~ a horizontal axis by a drive motur 43 ~hat include~ a sprocke~ wheel on its dri~e output shaft that is coupled by a chain to a sprocket w~eel 43A on the trunnion shaft 35~
The pusher car 18 includes an oper tor station where controls for ~he apparatus and method of the present invention are provided~ At this station~ for example, there is included an air-coolant supply sys~em 50 or the optical lens of the camera. A water-coolant supply ~ysltem 51 is coupled to the lines 34 for circulation o coolant water i~
~he passageway 33A o~ the enclosure. ~n ele~ation control ~ 3~ 3 52 is used to control the operation o motor 40 and a rotation control 53 is coupled to the motor 43 to control rota~ion of the enclosure 33 and camera 30.
The video signal from ~hP television camera is transmitted to a ~elevisio~ receiver 54. '~he video signal is also delivered ~o a ~agne~ic storag~ medium, preferably to a video recorder 55 that is co~nected to an audio amplifier 5$A that supplies an audio input signal to ~he recorder or the identification of the particular oven chamber that is undergoing in~pection as well as the parti-cular time at which ~he inspection occurredO A camera and lens control 57 is connected to ~he television camera 30 and the zoom-type lens 30A for ON and ~FF control and elose inspection of a particular surface area o~ the refractory liningO
Figs~ 4 and 5 illustrate a gyroscope moun~ing arrangement for support of the tele~ision camera 30 within the enclosurP 33O A four-bearing gimbal pla~form 60 forms an att~chment structure of the camera. The gimbal plat~orm 60 incl~des an outer rectangular frame 61 having aligned bearing suppor~s 62 a~ opposite sides of ~he frame suppor-ted by the side wall of the enclo~ure 33. The other opposite sides of ~he ~rame 61 carry aligned bearing sup--ports 63 of an inner rectangular plate 64. One side o~
the television camera i~ attached to the plate 64~ A
gyroscope 65 is~attached by a mounting plate 66 to the -~0~
.
3~3 othe~ side of the -~elevision camera. The gyroscope is operated pneumatically by directing a stream of air from a nozzle 67 onto a finned gyroscope wheel 65A to rotate it at a spePd o:E, for example, 20, 000 revolu~.ions per minute, By this construction and arrang2ment of parts~ mechanîcal shocks produced by the ram dri~e and movement of the ram are dampened or otherwise isolated from ~he tele~ision camera. In Fig. 4, thP optical system for the television camera includes a viewing prism 68 which is cooled by a streæm of air in a manner similar to that previously deseri-bed for cooling ~he lens of the television camera. ThQ
~iewing prism is employed to permit viewing o~ opposite : side walls of a coke chamber at the same time.
In Fig. 6, therP is illustrated a modi~ied form of apparatus to carry out the inspec~ion of a coke oven chamber while in its highly hea~ed state. The various parts formin~ the coke oven chamber are identi:ied with the same reerence numerals as previously identiied in regard to the coke oven chamb~r shown in Figs. 1 and 2~ Instead of employing the ram 19 as previously described to support and traverse the television camera wi~hin the coke oven chamber fGr inspection of the refractory lining thereo-~, the modifiGation illus~rated in Fig. 6 inclu~es the use of an extendible boom on a wheeled vehicle for traversing the TV camera along the chamber walls within the coke oven chamber. It is ~o be u~derstood that the previously 3~3 described television camera 30 within the box-like enclosure 33 and the various parts described in regard thereto are employed according to the embodimen~ of Fig~ 6~ The trun-nion shaft 35 is coupled to the outer end of a telescopic boom 70, The boom includes a plurality of ~ubes 71 adap~ed to slide one within the other. A piston and cylinder assembly 7~ located wi~hin the tubes 71 is coupled by i~s rod end to the outermost extending tube9 and at its cylinder end, a clevis or similar type of connec~ion is used ~o moun~
~he assembly within the tube having the largest diameter.
A motor-driven screw and nut may be used lnstead of the piston and cylinder assembly 72 to move the tubes in a telescoping manner. The boom 71 is supported between pairs oE rollers 73 and 74. A motor 7S is coupled to one of the rollers 73 to advance and retract the boom along the truck 76 relative ~o a coke oven chamberO The boom is supported by the truck 76 which is steerable and self-powered. It is deemed unnecessary to specifically describe the well-known manner by which an industrial ~ype truck is s~eered and powered.
The rollers 73 and 74 are carried at the forward ~nt rearward portions of ~he truck by vertical 5uppor~s 73A and 74A, respecti~ely~ The support 74A is vertically extendible by a~piston and cylinder assembly, not shown, to raise the suppor~ rollers 74 above rvllers 73. In ~his way~ the TV camera 30 is raised a~ the end of the boom I
~12~
.
. .
~ g ~ 3~ 3 toward the roo~ 14 for close observation of the side walls 13 adjacent the roof 14. The boom extends from th~ truck in an incl.ined manner as shown by the phantom-line position.
The supports 73A and 74~ are lo~ated a~ one lateral side of the truck and opposi~e thereto a control console 77 i~
located, This console includes ~he TV receiver 54, vidPo recorder 55~ audio amplifier 55A and control for the camera and lens 57, all as previously described. Moreover, addi-~ional apparatus to be hereinafter described7 is preferably included in th~ control console 77. ~ w~eeled carriage 78 is connected by a vertical suppor~ post 79 which is, in turn, attached by a s~eeve 80 to the trunnion shaft 35 or suppor~ing the outer end of the boom 70. The wheeled earriage is moved upon the ove~ hearth 11 by the boom but lifted from the hea~th when the boom is xaised by rollers 74 as pre~iously described. The wheeled carriage 78 and post 79 minimize cantilever forces imposed upon the truck as the boom is extended ~o traverse the '~V camera along the entire length of the coke oven chamber:. A position.
transducer is employed to provide an indication of the re~ative displacement of the TV camera wi~hin ~he coke oven chamber. Motor 75 is coupled to a pulse genera~or ~1 which in turn, delivPrs a pulse outpu~ signal ~o a counter ~2.
The pulse output signal corresponds to increments o a pre~
selected distance through which the boom is e~ended. A
similar pulse genera~or 83 is coupled to the rod end of 93~3 piston and cylinder assembly 72 to detec~ incrementallengths through which the boom 70 is extended. The pulse outpu~s from both pulse genera~ors 81 and 83 are ~ed to the counter 82. The output signal from the counter 82 is in the ~orm of a signal corresponding to the actual displacement of the TV camera relative ~o a fixed position of the truck 76 i.e.~ at the machine side of the coke o~en chamber. The output signal :from counter 82 is fed to a converter 84 which may be a matrix arrang~ment of diodes or other well-known forms of conversion circuî~ry to an analog signal~This analog signal is fed to a digital display 85 and/or combined by the picture ~ube control circuit 86 fox dis-play by the monitor together with the video signal corres-ponding to the side wall of thP coke oven chamber from the TV camera. The picture tube control 86 receives ~he ou~
put signal from the TV camer~ which is, in ~urn, coupled to a camera control circuit 87. Beeause of the relatively narrow width of a coke oven cham~er according to present-day designs~ i~e. 3 2 feet as prev~ously described, to 20 enable ~he produc~ion of a meaningful video display of a side wall of the coke oven chamber on a monitor, the optics - for the TV camera should be carefully chosen, In ~hls regard7 - suitable state-of-the-art lenses may be used with the standard 525-scan line cameraO Remote control of a mirror or prism in front of the camera lens will perm1t viewing opposite side walls of the coke oven chamber at different times. To achieve a display with a very high resolu~ion, a ~ 3~ 3 1050-scan line TV camera and video display monitor may be used whereby the resolution is increased by a factor o~ 4.
A 1050-scan line c~mera and display monitvr are well known in the art and commercially available in the industry.
The wheeled ~ruck 76 and boom 70 for supporting the TV camera while loca~ed within the pro~ec~.ive environ-ment of the enclosure 33 enable the inspection of a cokP
oven chamber a~ any desired period of time without requiring the use of the pusher ræm as employed according to the em~odiments of Figs. 1-5. In ~his regard~ ~he pusher car is commonly employed to effect pushing operations with a number of coke oven chambers forming part of a battery.
The use of the ram for inspec~ion purposes may be unaccep~
able in certain instances. Moreover, the residence time by the ram within a given coke oven chc~ber during a coke push~
ing opera~ion is usuaLly relatively shor~ so that the ram does not become distorted by the intense heat within the coke oven chamber. Since the ram is expensive and an indispens-able part of the coke oven battery, its use to carry out inspection operations may be objectionable but this is overcome by using the wheeled truck and boom illustrated in Fig. 6 It will be apparen~ to ~hose skilled in ~he ar~
in view of the foregoing that other forms of apparatus may be employed ~o position a television c~mera wlthin a heate~
coking chamber or the like with equal success. It is 3~
preferred that the camera be capable of rotation through360 to permit viewing of the roof 9 side walls and the hearth of ~he oven chamber. Vertical indexing of the camera by the motor-driven screws permi~s viewing of different portions of the side walls as the pusher is moved orward and backward horizontally along the oven chamber. During the înspection of the reractory lining, the camera can readily be posi~ioned to more closely observe suspec~ed damaged areas of ~he refractory lining by ei~her employing the zoom control of the lens or by posi~ioning the cam~ra and the thermally-protec~ive closure more closely to the refractory lining.
Although the inven~ion has been shown in connection with a certain specific embodimen~, it will be readily apparen~ to thQse skilled in ~he art tha~
various changes in form and arrangement of par~s may be made to suit requ~rements without departlng from the spirît and scope of the invention~
- , . .
. ~
Moreover9 this inspection procedure is further complicated by optical refraction caused by hot gases wi~hin the coking chamber during the inspec~ion viewing period. Thus~
extremely important information for ti~ely maintenance and pollutant-free operation of a coke oven bat~ery is presently compiled in a very rudimentary manner. While the foregoing descrlption has been addre~sed to the problems and diffi-culties associated wi~h the inspection of a refrac~ory sur-face of a coke oven chamber, the present invention is equally applicable ~o the inspe~ion o the ref~actory lining of other chambers including but not limîted to ves-seLs for pneumatic steel refining, furnace~ ~or reheating metallic workpieces and the like.
SUP~ RY OF TH~ INVENTION
It is an object of the present invention to provide an in~pection method and apparatus for viewing the internal reractory surface of a chamber while at a rela-tively high temperature in a manner which will:materiallyreduce ~he time required for such inspection while providing more accurate and detailed inspection information regarding the condit~on o~ the refractory surface~.
It i8 a ~urther object~of the present in~ention to provide a method and apparatus for inspecting the rerac- -tory lining of a high temperature chamber by moving a -3~
3~
televisi~n camera in spaced-apart relation along the refractory lining while the camera is located within a thermally-protective environment provided by an enclosure that includes means for cooling the optical lens of the camera and in a manner whereby the camera is remotely positioned and controlled at a location which preferably includes a television monitor for the immediate viewing of the video signal produced by the television camera.
It is another object of the present invention to provide an inspection method and apparatus including a television camera arranged within a thermally-protective environment provided by a water-cooled enclosure that i$
rotatably and linearly displaced while carried by a movable support member.
More specifically, according to the present invention, there is provided an inspection apparatus for inspecting the refractory lining in a high temperature chamber of a coke oven, a pneumatic steel treatment vessel, a reheat furnace for metallic workpieces and the like before and/or after treating the burden therein, the apparatus including the combination of:
a movable member to advance within the chamber in a direction along the refractory lining thereof, support means externally of the chamber to carry the movable member, an enclosure including side walls normally forming a substantially closed compartment, the enclosure being supported by the movable member for movement within the chamber, the enclosure including means for maintaining a thermally-protective environment within the compartment thereof, drive means coupled to the movable member to displace Jl/\~
,.,~, . ~ . .
3~3 the enclosure along the refractory l~ning of the chamber9 means carried within the compartment of the enclosure for producing a video signal corresponding to at least a portion of the refractory lining, the means including an optical lens exposed to the ~efractory lining through an - opening in the side wall of the enclosure, means for cooling the optical lens, means supported by the movable member to adjustably : position the means for producing a video signal, and receiver means for displaying the video signal produced by the first means and corresponding to at least a portion of the refractory lining.
The present invention also broadly provides a method for inspecting the refractory lining of a high ~emperature chamber in a coke oven, a Pneumatic s~eel treatment vessel, a reheat furnace for metallic workpieces and the like before and/or after treating the burden therein, the method including the steps of:
producing:a thermally-protective environment for a televisio;n camera which includes cooling the optical lens of the camera, supporting the thermally-protected television camera externally of the high temperature chamber for adjustable movement of the camera within the chamber, displacing the thermally-protected television camera in a spaced-apart location along the refractory lining within the high temperature chamber only when the chamber is void of a burden, transmitting a video signal corresponding to a first side wall portion of the refractory lining to a location external of the high temperature chamber by directing the lens for the camera toward the refractory lin-ing, ~lt~ ~5~
;. . ~
.
3~
displaying the video signal on a television receiver means, repositioning the thermally-protected camera and thereafter transmitting a video signal from within the high temperature chamber corresponding to a second side wall portion of the refractory lining to a location external of the high temperature chamber, and displaying the video signal corresponding to the second side wall portion of the refractory lining on a television receiver means.
The method of the present invention is further characterized by recording the video signal provided by the ~ 5a-3~93 television camera on a magnetic storage medium doring each one of a plurali~y o~ successive periods between operation of the high temperature chamber.
Thes~ features and advantages of the present inven~ion as well as o~hers will be moxe readily understood when the following descrip~ion is read in light of the accompanyi~g drawings~ in which;
Figure 1 is an elevational vlew, in section, o a typical coke oven chamber to undergo inspec~ion according to the method and apparatus of ~he present inven~ion;
Fig. 2 is a plan view~ in section, of the inspection appara~us according ~o the present invention;
Fig. 3 is an elevational ~iew of the inspection apparatus shown in Fig~ 2;
Fig. 4 is a plan view similar to Fig~ 2 but illustrating modifications to the insp ction apparatus according to ~he present invention;
Fig. S is a sectional view taken along line V-V
of Figo 4, and Fig. 6 is an elevational view of a further embodi-ment of the inspection apparatus according to the presentinvention.
Fig. 1 illustrates a coking chamber 10 which e~tends in a generall~ horizontal direction ~nd forms one of a plurality of spaced~apart and side-by-side coking chambers in a coke oven battery. The coki~g chamber 10 includes a refrac~ory hearth 11 located abo~e generators 12 used for .. . . .
3~33 regeneratively heating the coking chamber in a manner which is well known in the art~ The chamber 10 is closed a~ its opposite ends by removable doors, not showrl. The coking chamber has vertical sid~ walls 13 formed by courses o refractory brick or other forms of refractory material used to transmit heat from heating flues that extend between adjacent oven chambers. A roof 14, also made of refrac~ory material, has charging openings 15 for feeding coal into the oven chamber from a coal chsrging car mo~abLe along 10 the oven roof. A coke bench 16 is located above the ground floor at the coke side of the oven. The coke bench 16 - includes rails ~or suppoxting a coke guide machine, not shown, to guide ~he mass of coke pushed from the oven ohamber into a soke transfer car after positioning along rails 17 at the ~oke side of ~he oven cham~er~ At the machine side of the coking ehamber, w~ich is opposite the coke side, ~here is provided rails which carry a pushing machine 1~ that includes a ram 19 and a drive ha~ing a motor 20 to move a ram plate 21 into engagement with the mass of coke in the oven chamber. The ram is usually con-stru~ted in a manner such ~hat the coke engaging face of the ram is hori~ontally displaced in ~he coke chamber to the coke side thereof. The pusher machine al~o includes a leveling bar 22 used in a well-known manner to level a coal charge in an oven chamber.
Turning, now~ to Figs. ~ and 3~ according to -7- :
3~3 the present inven~ion ~he ram 19 is used to suppor~ and traverse a television camera 30 within the coking chamber for inspec~ion oE ~he re~rac~ory lining thereof while in a highly heated stateO Typically, the inspec~ion operation is carried ou~ immediately af~er a soke pushing ope~ationO The camera is protected from the adverse environment within the coking chamber~ particularly ~he high temperature that may be of the order of 2200DF during ~his period of time. The television cæmera is per se well known in the art. The camera has a rem~tely con~rollable zoom-type lens 30A that is surrounded by a pipe 31 coupled to an airline 32 for discharging air through openings in the side walls of the pipe to cool the lens. The television camera is supported within a box-like enclosure 33 that includes side walls containing spaced~apart and parallel fluid conduc~ing pipes or lines 33A that communicate with similar fluid conducting lines in the top and floor walls. The lines 33A recei~e and discharge coolan~ water conducted by lines 34 tha~
extend internally along a trunnion shaft 35 to a rotary union 34A. ~ther supply lines, not shown, are connected to the rotaxy union and ext nd along the ram 19 to the pushing machine.
The trunnion shaft 35 is rotatably suppor~ed ~y bearings carried in a bearing block 36 that is, in tur~
supported by carrier anms 37. The carrier arms are received between guide plates forming part of an L~shaped ., .. . ..
~ 3~ 3 support member 38~ The carrier arms 37 have threaded bores that receive threaded shafts 39 ~hat are ro~a~ed by sprocket wheels 39A coupled by a chain drive mo~or 40 carried by support member 38. The mo~or is employed ~o rotate shafts 39 which, in turn, displaee ~he carrier arms 37 and trunnion shaft 35. In ~his way, the television camera is movably positioned vertically along the face-plate 21 o~ the ramO The L-shaped support member 38 includes a spring-biased plunger 41 adapted to engage the back sur-face of the pusher pla~e of the arm, as clearly shown in Fig~ 3. The top member of the L-shaped support member is supported directly upon the top surface of the pusher plate.
The L~shaped support member is removably supported by the ram and held in an outwardly-spaced relation from the face ; of the pusher plate by a spacer foo~ 42Q
The enclosure 33 is rotatably positioned abou~ a horizontal axis by a drive motur 43 ~hat include~ a sprocke~ wheel on its dri~e output shaft that is coupled by a chain to a sprocket w~eel 43A on the trunnion shaft 35~
The pusher car 18 includes an oper tor station where controls for ~he apparatus and method of the present invention are provided~ At this station~ for example, there is included an air-coolant supply sys~em 50 or the optical lens of the camera. A water-coolant supply ~ysltem 51 is coupled to the lines 34 for circulation o coolant water i~
~he passageway 33A o~ the enclosure. ~n ele~ation control ~ 3~ 3 52 is used to control the operation o motor 40 and a rotation control 53 is coupled to the motor 43 to control rota~ion of the enclosure 33 and camera 30.
The video signal from ~hP television camera is transmitted to a ~elevisio~ receiver 54. '~he video signal is also delivered ~o a ~agne~ic storag~ medium, preferably to a video recorder 55 that is co~nected to an audio amplifier 5$A that supplies an audio input signal to ~he recorder or the identification of the particular oven chamber that is undergoing in~pection as well as the parti-cular time at which ~he inspection occurredO A camera and lens control 57 is connected to ~he television camera 30 and the zoom-type lens 30A for ON and ~FF control and elose inspection of a particular surface area o~ the refractory liningO
Figs~ 4 and 5 illustrate a gyroscope moun~ing arrangement for support of the tele~ision camera 30 within the enclosurP 33O A four-bearing gimbal pla~form 60 forms an att~chment structure of the camera. The gimbal plat~orm 60 incl~des an outer rectangular frame 61 having aligned bearing suppor~s 62 a~ opposite sides of ~he frame suppor-ted by the side wall of the enclo~ure 33. The other opposite sides of ~he ~rame 61 carry aligned bearing sup--ports 63 of an inner rectangular plate 64. One side o~
the television camera i~ attached to the plate 64~ A
gyroscope 65 is~attached by a mounting plate 66 to the -~0~
.
3~3 othe~ side of the -~elevision camera. The gyroscope is operated pneumatically by directing a stream of air from a nozzle 67 onto a finned gyroscope wheel 65A to rotate it at a spePd o:E, for example, 20, 000 revolu~.ions per minute, By this construction and arrang2ment of parts~ mechanîcal shocks produced by the ram dri~e and movement of the ram are dampened or otherwise isolated from ~he tele~ision camera. In Fig. 4, thP optical system for the television camera includes a viewing prism 68 which is cooled by a streæm of air in a manner similar to that previously deseri-bed for cooling ~he lens of the television camera. ThQ
~iewing prism is employed to permit viewing o~ opposite : side walls of a coke chamber at the same time.
In Fig. 6, therP is illustrated a modi~ied form of apparatus to carry out the inspec~ion of a coke oven chamber while in its highly hea~ed state. The various parts formin~ the coke oven chamber are identi:ied with the same reerence numerals as previously identiied in regard to the coke oven chamb~r shown in Figs. 1 and 2~ Instead of employing the ram 19 as previously described to support and traverse the television camera wi~hin the coke oven chamber fGr inspection of the refractory lining thereo-~, the modifiGation illus~rated in Fig. 6 inclu~es the use of an extendible boom on a wheeled vehicle for traversing the TV camera along the chamber walls within the coke oven chamber. It is ~o be u~derstood that the previously 3~3 described television camera 30 within the box-like enclosure 33 and the various parts described in regard thereto are employed according to the embodimen~ of Fig~ 6~ The trun-nion shaft 35 is coupled to the outer end of a telescopic boom 70, The boom includes a plurality of ~ubes 71 adap~ed to slide one within the other. A piston and cylinder assembly 7~ located wi~hin the tubes 71 is coupled by i~s rod end to the outermost extending tube9 and at its cylinder end, a clevis or similar type of connec~ion is used ~o moun~
~he assembly within the tube having the largest diameter.
A motor-driven screw and nut may be used lnstead of the piston and cylinder assembly 72 to move the tubes in a telescoping manner. The boom 71 is supported between pairs oE rollers 73 and 74. A motor 7S is coupled to one of the rollers 73 to advance and retract the boom along the truck 76 relative ~o a coke oven chamberO The boom is supported by the truck 76 which is steerable and self-powered. It is deemed unnecessary to specifically describe the well-known manner by which an industrial ~ype truck is s~eered and powered.
The rollers 73 and 74 are carried at the forward ~nt rearward portions of ~he truck by vertical 5uppor~s 73A and 74A, respecti~ely~ The support 74A is vertically extendible by a~piston and cylinder assembly, not shown, to raise the suppor~ rollers 74 above rvllers 73. In ~his way~ the TV camera 30 is raised a~ the end of the boom I
~12~
.
. .
~ g ~ 3~ 3 toward the roo~ 14 for close observation of the side walls 13 adjacent the roof 14. The boom extends from th~ truck in an incl.ined manner as shown by the phantom-line position.
The supports 73A and 74~ are lo~ated a~ one lateral side of the truck and opposi~e thereto a control console 77 i~
located, This console includes ~he TV receiver 54, vidPo recorder 55~ audio amplifier 55A and control for the camera and lens 57, all as previously described. Moreover, addi-~ional apparatus to be hereinafter described7 is preferably included in th~ control console 77. ~ w~eeled carriage 78 is connected by a vertical suppor~ post 79 which is, in turn, attached by a s~eeve 80 to the trunnion shaft 35 or suppor~ing the outer end of the boom 70. The wheeled earriage is moved upon the ove~ hearth 11 by the boom but lifted from the hea~th when the boom is xaised by rollers 74 as pre~iously described. The wheeled carriage 78 and post 79 minimize cantilever forces imposed upon the truck as the boom is extended ~o traverse the '~V camera along the entire length of the coke oven chamber:. A position.
transducer is employed to provide an indication of the re~ative displacement of the TV camera wi~hin ~he coke oven chamber. Motor 75 is coupled to a pulse genera~or ~1 which in turn, delivPrs a pulse outpu~ signal ~o a counter ~2.
The pulse output signal corresponds to increments o a pre~
selected distance through which the boom is e~ended. A
similar pulse genera~or 83 is coupled to the rod end of 93~3 piston and cylinder assembly 72 to detec~ incrementallengths through which the boom 70 is extended. The pulse outpu~s from both pulse genera~ors 81 and 83 are ~ed to the counter 82. The output signal from the counter 82 is in the ~orm of a signal corresponding to the actual displacement of the TV camera relative ~o a fixed position of the truck 76 i.e.~ at the machine side of the coke o~en chamber. The output signal :from counter 82 is fed to a converter 84 which may be a matrix arrang~ment of diodes or other well-known forms of conversion circuî~ry to an analog signal~This analog signal is fed to a digital display 85 and/or combined by the picture ~ube control circuit 86 fox dis-play by the monitor together with the video signal corres-ponding to the side wall of thP coke oven chamber from the TV camera. The picture tube control 86 receives ~he ou~
put signal from the TV camer~ which is, in ~urn, coupled to a camera control circuit 87. Beeause of the relatively narrow width of a coke oven cham~er according to present-day designs~ i~e. 3 2 feet as prev~ously described, to 20 enable ~he produc~ion of a meaningful video display of a side wall of the coke oven chamber on a monitor, the optics - for the TV camera should be carefully chosen, In ~hls regard7 - suitable state-of-the-art lenses may be used with the standard 525-scan line cameraO Remote control of a mirror or prism in front of the camera lens will perm1t viewing opposite side walls of the coke oven chamber at different times. To achieve a display with a very high resolu~ion, a ~ 3~ 3 1050-scan line TV camera and video display monitor may be used whereby the resolution is increased by a factor o~ 4.
A 1050-scan line c~mera and display monitvr are well known in the art and commercially available in the industry.
The wheeled ~ruck 76 and boom 70 for supporting the TV camera while loca~ed within the pro~ec~.ive environ-ment of the enclosure 33 enable the inspection of a cokP
oven chamber a~ any desired period of time without requiring the use of the pusher ræm as employed according to the em~odiments of Figs. 1-5. In ~his regard~ ~he pusher car is commonly employed to effect pushing operations with a number of coke oven chambers forming part of a battery.
The use of the ram for inspec~ion purposes may be unaccep~
able in certain instances. Moreover, the residence time by the ram within a given coke oven chc~ber during a coke push~
ing opera~ion is usuaLly relatively shor~ so that the ram does not become distorted by the intense heat within the coke oven chamber. Since the ram is expensive and an indispens-able part of the coke oven battery, its use to carry out inspection operations may be objectionable but this is overcome by using the wheeled truck and boom illustrated in Fig. 6 It will be apparen~ to ~hose skilled in ~he ar~
in view of the foregoing that other forms of apparatus may be employed ~o position a television c~mera wlthin a heate~
coking chamber or the like with equal success. It is 3~
preferred that the camera be capable of rotation through360 to permit viewing of the roof 9 side walls and the hearth of ~he oven chamber. Vertical indexing of the camera by the motor-driven screws permi~s viewing of different portions of the side walls as the pusher is moved orward and backward horizontally along the oven chamber. During the înspection of the reractory lining, the camera can readily be posi~ioned to more closely observe suspec~ed damaged areas of ~he refractory lining by ei~her employing the zoom control of the lens or by posi~ioning the cam~ra and the thermally-protec~ive closure more closely to the refractory lining.
Although the inven~ion has been shown in connection with a certain specific embodimen~, it will be readily apparen~ to thQse skilled in ~he art tha~
various changes in form and arrangement of par~s may be made to suit requ~rements without departlng from the spirît and scope of the invention~
- , . .
. ~
Claims (24)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An inspection apparatus for inspecting the refractory lining in a high temperature chamber of a coke oven, a pneumatic steel treatment vessel, a reheat furnace for metallic workpieces and the like before and/or after treating the burden therein, said apparatus including the combination of:
a movable member to advance within said chamber in a direction along the refractory lining thereof, support means externally of said chamber to carry said movable member, an enclosure including side walls normally forming a substantially closed compartment, said enclosure being supported by said movable member for movement within said chamber, said enclosure including means for maintaining a thermally-protective environment within the compartment thereof, drive means coupled to said movable member to displace said enclosure along the refractory lining of said chamber, means carried within the compartment of said enclosure for producing a video signal corresponding to at least a portion of said refractory lining, said means including an optical lens exposed to the refractory lining through an opening in the side wall of said enclosure, means for cooling said optical lens, means supported by said movable member to adjustably position said means for producing a video signal, and receiver means for displaying the video signal produced by the first said means and corresponding to at least a portion of said refractory lining.
a movable member to advance within said chamber in a direction along the refractory lining thereof, support means externally of said chamber to carry said movable member, an enclosure including side walls normally forming a substantially closed compartment, said enclosure being supported by said movable member for movement within said chamber, said enclosure including means for maintaining a thermally-protective environment within the compartment thereof, drive means coupled to said movable member to displace said enclosure along the refractory lining of said chamber, means carried within the compartment of said enclosure for producing a video signal corresponding to at least a portion of said refractory lining, said means including an optical lens exposed to the refractory lining through an opening in the side wall of said enclosure, means for cooling said optical lens, means supported by said movable member to adjustably position said means for producing a video signal, and receiver means for displaying the video signal produced by the first said means and corresponding to at least a portion of said refractory lining.
2. The inspection apparatus according to Claim 1 further comprising recorder means for receiving said video signal.
3. The inspection apparatus according to Claim 1 wherein said means for maintaining a thermally-protective environment within said compartment includes fluid conducting lines carried by the side walls forming said enclosure.
4. The inspection apparatus according to Claim 1 wherein said movable member includes an elongated ram for pushing coke from an oven chamber, and wherein said means to adjustably position includes a generally L-shaped bracket removably supported by the coke engaging end of said ram and carried thereby within an emptied oven chamber.
5. The inspection apparatus according to Claim 4 further comprising means carried by said L-shaped bracket for rotatably positioning said enclosure about a horizontal axis.
6. The inspection apparatus according to Claim 5 further comprising means for vertically displacing said enclosure along the end of said ram.
7. The inspection apparatus according to Claim 1 wherein said movable member includes an extendible boom for carrying said enclosure, and wherein said support means includes truck means for supporting said boom externally of said chamber to move along the refractory lining within the chamber.
8. The apparatus according to Claim 7 further comprising means for extending said boom within said chamber.
9. The apparatus according to Claim 8 wherein said extendible boom includes a plurality of tubes adapted to slide one within the other.
10. The apparatus according to Claim 8 further comprising position transducer means for detecting the displacement of said means for producing a video signal relative to said chamber.
11. The apparatus according to Claim 8 further comprising a wheeled carriage to support said boom within said chamber.
12. The apparatus according to Claim 8 further comprising means carried by said truck means to elevate said enclosure within said chamber.
13. The apparatus according to Claim 8 further comprising rollers supported by said truck means to move said boom along said truck means relative to said chamber.
14. The apparatus according to Claim 8 wherein said truck is steerable and self-powered, said receiver means being supported by said truck.
15. The inspection apparatus according to Claim l wherein said means carried within the compartment of said enclosure for producing a video signal includes a television camera having a remotely-controlled optical lens.
16. The inspection apparatus according to Claim 2 further comprising means coupled to said recorder means for delivering an audio input signal thereto.
17. The inspection apparatus according to Claim 1 further comprising a gimbal platform to support said means for producing a video signal upon a side wall of said enclosure, and a driven gyroscope means carried by said means for producing a video signal.
18. The inspection apparatus according to Claim 1 wherein said optical lens includes a viewing prism.
19. A method for inspecting the refractory lining of a high temperature chamber in a coke oven, a pneumatic steel treatment vessel, a reheat furnace for metallic workpieces and the like before and/or after treating the burden therein, said method including the steps of:
producing a thermally-protective environment for a television camera which includes cooling the optical lens of the camera, supporting the thermally protected television camera externally of said high temperature chamber for adjustable movement of the camera within the chamber, displacing the thermally-protected television camera in a spaced-apart location along the refractory lining within the high temperature chamber only when the chamber is void of a burden, transmitting a video signal corresponding to a first side wall portion of the refractory lining to a location external of the high temperature chamber by directing the lens for the camera toward the refractory lining, displaying the said video signal on a television receiver means, repositioning the thermally-protected camera and thereafter transmitting a video signal from within the high temperature chamber corresponding to a second side wall portion of the refractory lining to a location external of the high temperature chamber, and displaying the video signal corresponding to the second side wall portion of the refractory lining on a television receiver means.
producing a thermally-protective environment for a television camera which includes cooling the optical lens of the camera, supporting the thermally protected television camera externally of said high temperature chamber for adjustable movement of the camera within the chamber, displacing the thermally-protected television camera in a spaced-apart location along the refractory lining within the high temperature chamber only when the chamber is void of a burden, transmitting a video signal corresponding to a first side wall portion of the refractory lining to a location external of the high temperature chamber by directing the lens for the camera toward the refractory lining, displaying the said video signal on a television receiver means, repositioning the thermally-protected camera and thereafter transmitting a video signal from within the high temperature chamber corresponding to a second side wall portion of the refractory lining to a location external of the high temperature chamber, and displaying the video signal corresponding to the second side wall portion of the refractory lining on a television receiver means.
20. The method according to Claim 19 including the further step of recording the video signals produced by said television camera on a magnetic storage medium during each one of a plurality of video signal transmissions which occur between successive periods of operation of the high temperature chamber.
21. The method according to Claim 19 wherein said displacing the thermally-protected television camera includes advancing a movable ram while supporting the camera within the thermally-protected chamber.
27. The method according to Claim 19 wherein said displacing the thermally-protected television camera includes extending a boom within the high temperature chamber while supporting the camera within the thermally-protected chamber.
23. The method according to Claim 19 including the further steps of generating an electrical signal corresponding to the displaced distance of the television camera within the high temperature chamber, and using said electrical signal to provide a numerical display of said displaced distance.
24. The method according to Claim 19 including the further step of using a steerable and self-powered truck while supporting an extendible boom for said displacing the thermally-protected television camera.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US61598875A | 1975-09-23 | 1975-09-23 | |
| US615,988 | 1975-09-23 | ||
| US719,858 | 1976-09-02 | ||
| US05/719,858 US4131914A (en) | 1975-09-23 | 1976-09-02 | Method and apparatus for inspecting refractory lining in coke oven chambers and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1099393A true CA1099393A (en) | 1981-04-14 |
Family
ID=27087651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA261,639A Expired CA1099393A (en) | 1975-09-23 | 1976-09-21 | Method and apparatus for inspecting refractory lining in coke oven chambers and the like |
Country Status (2)
| Country | Link |
|---|---|
| JP (2) | JPS5249044A (en) |
| CA (1) | CA1099393A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092491A (en) * | 2021-03-23 | 2021-07-09 | 湖北特种设备检验检测研究院 | Boiler equipment inspection detecting system |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55144532A (en) * | 1979-04-27 | 1980-11-11 | Kawasaki Steel Corp | Method and device for sounding in cylindrical tube |
| JPS56137281A (en) * | 1980-03-31 | 1981-10-27 | Tokyo Shibaura Electric Co | Monitoring inspection car |
| US4301998A (en) * | 1980-04-25 | 1981-11-24 | Pfizer Inc. | Vertical gunning apparatus with television monitor |
| JPS58206681A (en) * | 1982-05-27 | 1983-12-01 | Mitsubishi Chem Ind Ltd | Inspection of coke oven wall |
| JPS59147112U (en) * | 1983-03-22 | 1984-10-01 | 三菱重工業株式会社 | remote viewing device |
| JPS60232488A (en) * | 1984-05-01 | 1985-11-19 | 品川白煉瓦株式会社 | Device for observing inside of furnace |
| JPS61129850U (en) * | 1985-01-26 | 1986-08-14 |
-
1976
- 1976-09-21 CA CA261,639A patent/CA1099393A/en not_active Expired
- 1976-09-24 JP JP51113769A patent/JPS5249044A/en active Pending
-
1984
- 1984-05-15 JP JP6986684U patent/JPS6033651Y2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092491A (en) * | 2021-03-23 | 2021-07-09 | 湖北特种设备检验检测研究院 | Boiler equipment inspection detecting system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5249044A (en) | 1977-04-19 |
| JPS6033651Y2 (en) | 1985-10-07 |
| JPS6017067U (en) | 1985-02-05 |
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| Date | Code | Title | Description |
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| MKEX | Expiry |