CA1094798A - Apparatus for repairing the furnace lining with a shooting pipe of non-circular hollow cross section - Google Patents
Apparatus for repairing the furnace lining with a shooting pipe of non-circular hollow cross sectionInfo
- Publication number
- CA1094798A CA1094798A CA351,018A CA351018A CA1094798A CA 1094798 A CA1094798 A CA 1094798A CA 351018 A CA351018 A CA 351018A CA 1094798 A CA1094798 A CA 1094798A
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- Prior art keywords
- pipe
- shooting pipe
- shooting
- section
- circular
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Abstract
ABSTRACT OF THE DISCLOSURE:
A gunning apparatus for repairing the furnace lining which is provided with a shooting pipe of non-circular hollow cross-section is disclosed. The shooting pipe of above cross-section slidably moves back and forth within a rocking sleeve by a slide mechanism while the shooting pipe is unrotatable relative to the slide mechanism and is rotatable only by the rotation of the slide mechanism whereby the shooting pipe is manipulated without weakening the rigidity or strength thereof which usually occurs on the circular shooting pipe which requires keyways for rotation thereof.
A gunning apparatus for repairing the furnace lining which is provided with a shooting pipe of non-circular hollow cross-section is disclosed. The shooting pipe of above cross-section slidably moves back and forth within a rocking sleeve by a slide mechanism while the shooting pipe is unrotatable relative to the slide mechanism and is rotatable only by the rotation of the slide mechanism whereby the shooting pipe is manipulated without weakening the rigidity or strength thereof which usually occurs on the circular shooting pipe which requires keyways for rotation thereof.
Description
1.0~7~8 This is a divisional application of copending applica-tion No. 268,003, filed on 16th Dece~ber 1976.
This invention relates to an apparatus for repairing the lining o~ a furnace used in a steel making plant, and more particularly to a shooting pipe of non-circular hollow cross-section and the mechanisms to operate the above shooting pipe.
Conventional shooting pipe has a cross-section of complete circle and is generally manipulated such that the pipe is tilted in an upward or downward direction as well as to the right or left and is slidable in an axial direction and is further rotated on the axis of the shooting pipe.
Although the conventional shooting pipe has been suffi-~cient and effective when manually operated, the shooting pipe of above cross-section is not proper when the revolving or sliding operations of the shooting pipe must be mechanically or automatically conducted in order to meet the requirement of improved mobility or operability of the gunning device in cur-rently sophisticated steel making plants.
Therefore the shooting pipe must be provided with a guiding meshanism which works with rotating and slide mechanisms.
However, since the conventional pipe is made of compa-`~
ratively thin circular tube such as a gas pipe, a guiding mechanism cannot be formed thereon, and even if a guide could be provided by making a keyway along the pipe, the pipe would decrease drastically in rigidity or strength. On the other hand, in order to maintain the rigidity or strength, entire weight of the pipe would be increased and the cost of producing such a pipe is considerably very high.
It is an object of the present invention to provide a shooting pipe with a non-circular cross-section which would resolve the a~orementioned problems.
Moreover the conventional method for repairing the 10~ 8 furnace lining requires at least some number of operators under high radiation heat conditions and since the pipe is manually operated, the operators are subject to heavy labor.
Therefore it is another object of the present invention to provide a gunning apparatus which is provided with the above shooting pipe and desired mechanism which can manipulate the shooting pipe automatically.
Accordingly, the present invention, as herein claimed, is an apparatus for repairing the lining of a furnace, especially a DH furnace and a RH furnace, essentially comprising a movable transport car, a vertically disposed shooting pipe mounted on the car, an elevating mechanism on the car for raising and lowering said shooting pipe and a rotating mechanism on said car for rotating said shooting pipe. According to the invention, the shooting pipe has a non-circular hollow cross-section and is unrotata~le relative to the elevating mechanism and therefore is rotated by the rotating mechanism by way of the elevating mechanism whereby the shooting pipe is manipulated - without wea~ening the rigidity or strength thereof which usually occurs on a circular shooting pipe which requires key-ways for rotation thereof.
Preferably, the shooting pipe has a polygonal, oblong circular, liP-shaped or rectangular hollow cross-section.
Embodiments of the invention will now be dèscribed with reference to the appended drawings wherein:
Fig. 1 is a side view with a part in cross-section of the gunning apparatus of the first embodiment of this invention.
Fig. 2 i5 an enlarged cross-sectional view of the above apparatus taken on line I-I of Fig. 1.
3~ Fig. 3 is an enlarged cross-sectional view of the above apparatus taken on line II-II of Fig. 1.
Fig. ~ is a side view with a part in cross-section of i - 1094798 the gunning apparatus of the second embodiment of this invention.
Fig. 5 is an enlarged cross-sectional view of the above apparatus ta~en along the line III-III of Fig. 4.
Flg. 6A through Fig. 6I are cross-sectional views of `
the non-circular shooting pipes applicable to the apparatus of this invention.
' Fig. 7 is a side view with a part in cross-section of the modification of the apparatus of either first or second embodiment which is provided with a non-circular shooting pipe of a duplicate-pipe construction.
Fig. 8 is an enlarged cross-sectional view of the above apparatus taken along the line IV-IV of Fig. 7. ~`
Fig. 9 is an enlarged cross-sectional view of the above apparatus taken along the line ~-V-of Fig. 7.
Fig. 10 is an enlarged cross-sectional view of the above apparatus taken along the line VI-VI of Fig. 7.
Fig. 11 is a partial side view with a portion in cross-section of the apparatus of the third embodiment of this invention.
Fig. 12 is an enlarged rear end view of the above appara~us ~aken along the line VIT-VII of Fig. 11.
:,.'.5 `. . . ~, . .. ~ . . _ ___,_, _ __ ; `` 10~4798 Fig. 13 is another enlarged rear end view of the above apparatus taken along the line VIII-VIII of Fig. 11.
Fig. 14 is a front view with a part broken away of the apparatus of the fourth embodiment of this invention.
Fig. 15 is a front view of the above apparatus rcrair-ing a DH furnace.
Fig. 16 is a front view of the above apparatus repair-ing a RH furnace.
Fig. 17 is a perspective view of the above apparatus in operation The apparatus for repairin~ the furnace lining of this invention which is provided with the improved type of shooting pipe is hereinafter disclosed in the following embodiments in conjunction with the attached drawings.
The gunning device of the first embodiment is shown in Fig. 1 through Fig.3 and is generally used for the repairing of the lining of a converter furnace or an open-hearthfurnace.
In the drawings, a support column 2 is rotatably mount-ed on a transport car 1 which in turn is provided with four wheels 3 for facilitating the mohility of transport car 1.
A rocking sleeve 4 is tiltably mounted on the top of the support column 2 and a long rigid shooting pipe 5 having the non-circular hollow cross section thereof is slidably disposes in the rocking sleeve 4.
A spray nozzle 6 is fixed to the front end of the shooting pipe 5 while a hose 7 is rotatably cannected with the pipe 5 by means of a swivel joint 8.
~ he hose 7 is connected to a suitable mixer (not shown in the drawin~) arranged to supply refractory material in proper form for spraying.
In this invention, the rotating means for rotating the support column 2 on the vextical axis thereof comprises a worm ` ;; ~ ` 1094798 wheel 9 fixedly secured to the base portion of the support column 2, a worm gear 10 which is meshed with the worm wheel 9 on the same level, a drive means such as a power-operated motor for driving the worm wheel 10.
Numeral 12 indicates a tilting means such as a hydrau-lic cylinder for causing the rocking movement of the rocking sleeve 4 and this hydraulic cylinder 12 is diagonally disposed on the transport car 1 while numeral 13 indicates a pivot shaft which pivotally connects the rocking sleeve 4 to the support -collumn 2.
The rotating means for rotating the non-circular shoot-ing pipe 5 of this embodiment comprises a spur wheel 14 which receives the shooting pipe 5 slidably but unrotatably by way of slide bearing 15, a spur gear 16 which meshes ~ith the spur wheel 14, a drive means 17 such as a power-operated motor which is mounted on the front end of the rocking sleeve 4 for rotating the spur gear 16.
The means for causing the shooting pipe 5 to move towards or away from the furnace (not shown in the drawing) or relative to the roc~ing sleeve 4 is disposes at the rear end of the rocking sleeve 4 and comprises guide rollers 18 which rotate firmly on either side of the non-circular shooting pipe 5 so as to move the non-circular shooting pipe 5 back and forth at opposite sides, a drive means 19 such as a power-operated motor for driving guide rollers by way of gear means 20 ana a r~tating circular plate 21 which is rotatably mounted on the flange portion of the rocking sleeve 4 for integrally rotating guide rollers 18, drive means 19, and gear means 20 with shoot-ing pipe 5 relative to r.ocking sleeve 4 which are all mounted on the circular plate 21.
At each longitudinal end of the rocking sleeve 4, a duplicate bearing 22 are provided wherein outer bearin~s allow ```` ` 10~4798 the rotation of the non-circular shooting pipe 5 relative to the rocking sleeve 4.
In fig. 4 and Fig. 5, the second embodiment of the gunning apparatus which is provided with the non-circular shoot-in~ pipe of this invention is discloses wherein the improvement is characterized in that the means for rotating the non-circular rotating pipe 5 relative to the rocking sleeve 4 and a means for moving back and forth the shooting pipe 5 along and within the rocking sleeve 4 are both integrally assembled at the rear end of the rocking sleeve.
The gunning apparatus of this embodiment is further provided with a gear mechanism for permitting the rockin~ move-ment of the rocking sleeve instead of the hydraulic cylinder of the first embodim~nt.
In the assembled construction of rotating and slide means shown in Fig. 4, a drive means 17' for rotating the shoot-ing pipe 5 is mounted on the rocking sleeve 4 and has a spur gear 16' fixed to the drive shaft thereof. This spur gear 16' is meshed with a toothed circular plate 21' which is rotably mounted on the rear flange portion of the rocking sleeve 4. The toothed circular plate 21' is provided with a slide bearing 15' at the center thereof for facilitating-the smooth lengthwise movement of the shooting pipe ~. The toothed circular plate 21' is further provided with means for moving the shcoting pipe 5 back and forth within and along the rocking sleeve 4 which comprises ~uide roller means 18' and a drive means 19' for driviny the guide roller means 18' by way of gear means 20', Refering to the means for permitting the rocking move-ment of the rocking sleeve 4, numeral 23 indicates a spur qear which is fixedly secured to the drive shaft 24 of a drive means (not shown in the dra~ing). This spur gear 23 is meshed with a semi-circular spur wheel 25 secured to the lower portion of `` ~094798 the rockin~ sleeve ~.
In the above emhodiments, non-circular shootin~ pipe 5 has the cross sections disclosed in Fig. 6, These non-circu-lar or polygonal hollow cross sections have at least one sliding guide surface 5a thereof respectively for preventing the rota-- tion thereof on their lon~itudinal axis. The shooting pi~e 5 of this invention may be constructed by a plurality of non-cir-cular pipes so that the shooting pipe 5 can be extended or retract-e~ in a telescopic manner whereby the lengthwise slide movement of the shooting pipe 5 is further im~rove~.
Fig. 9 shows such a construction of the shooting pipe which is tclescopically extended or retracted in two stages, wherein numeral 5-1 indicates a secondary pipe which slidably but unrotatably encloses a primary shooting pipe 5.
For the above purpose, the primary a~d secondary pipes 5 and 5-1 have the corresponding hollow square cross sections.
The shooting pipe may be further telescopically construct-ed such that each inner pipe has at least one contacting point on the rotating locus thereof which contacts with inner surface of the outer pipe so that each contactinq point worlcs as a means for preventing the rotation of the inner pipe as well as a means for guiding the reciprocation of the inner pipe.
Fig. 6A through Fig. 6J show various cross sections which are suitable as a cross section of the shooting pipe of this invention wherein the experiment has proved that the shoot-ing pipes having the cross sections shown in Fig. ~ through Fig. 6D are most suitable and have following advanta~es;
i) The refractory material in either wet or dry form can smoothly pass through the pipe.
3~ii) The refractory material does not adhere to the inner surface of the pipe.
iii) The pipe can maintain high ri~ y thereof.
"": ` 109~798 . ~ ,.
To recapitulate the o~eration of the apparatus of the first and second embodiments, the support column is rotatably mounted on the transport car by means of the drive means and conbination of the worm gear and worm wheel so that the shoot-ing pipe is also rotated on the vertical axis of the support column while the hydraulic cylinder or the gear mechanism which comprises the semi-circular wheel and the drive gear is capable of rocking the rocking sleeve so that the spray nozzle fixed to the extremity of the shooting pipe can be displaced vertically within che furnace. The shooting pipe is also rotated on the axis thereof within and relative to the rocking sleeve by either a combination of the drive means, gear means and circular rotat-ing plate or a combination of drive means, gear means and circu-lar rotating plate so that the spraying dlrection of the spray nozzle is displaced at an angle of 360 degrees while the shoot-ing pipe is furthermore movable back and forth within and rela-tive to the rocking sleeve so that the shooting pipe can be displaced in a lengtwise direction within and relative to the furnace.
Therefore, the shooting pipe, or more particularly the spray nozzle fixed to the front end of the shooting pipe can be moved verticall~v and horizontally while the pipe can be also mov-ed back and forth whereby the operation for repairing the furna-ce lining is conducted mechanically and automatically by a remo-te control means (not shown in drawings).
The third embodiment of the gunninq apparatus of this invention is described hereinafter in conjunction with the attach-ed drawings, Fig. ll through Fig. 13 wherein the improvement is characterized in that the rocking sleeve and the shooting pipe are integrally rotated without rotating the shootinq pipe rela-tive to the roc~inq sleeve as disclosed in the first embodiment.
As shown in Fig. 11, the means for rotating the shoot-~ ` 1094798 .. ..
ing pipe 5 is constructed such that a slide ring 26 ~Jhich is pivotally mounted on the top of the support column 2 by a pivot pin rotatably receives the middle portion of the rocking sleeve 4. Adjacent to the slide ring 26, a spur wheel 27 is fixedly secured around the rocking sleeve 4, This spur wheel 27 is meshed with a spur gear 28 fixed to the drive shaft of a drive means 29 such as a power-operated motor which is fixedly mount-ed on the top portion of the slide ring 26.
Another slide ring 30 is rotatably mounted on the rocking sleeve 4 in place and has a lug 31 formed at the lower portion thereof. An actuating rod 32 of a diagonally disposed hydraulic cylinder 33 is pivotally connected by a pin 34 to the above lug 31 while the distal end of the cylinder 33 is pivo-tally secured to a lug 35 formed to the side of support column
This invention relates to an apparatus for repairing the lining o~ a furnace used in a steel making plant, and more particularly to a shooting pipe of non-circular hollow cross-section and the mechanisms to operate the above shooting pipe.
Conventional shooting pipe has a cross-section of complete circle and is generally manipulated such that the pipe is tilted in an upward or downward direction as well as to the right or left and is slidable in an axial direction and is further rotated on the axis of the shooting pipe.
Although the conventional shooting pipe has been suffi-~cient and effective when manually operated, the shooting pipe of above cross-section is not proper when the revolving or sliding operations of the shooting pipe must be mechanically or automatically conducted in order to meet the requirement of improved mobility or operability of the gunning device in cur-rently sophisticated steel making plants.
Therefore the shooting pipe must be provided with a guiding meshanism which works with rotating and slide mechanisms.
However, since the conventional pipe is made of compa-`~
ratively thin circular tube such as a gas pipe, a guiding mechanism cannot be formed thereon, and even if a guide could be provided by making a keyway along the pipe, the pipe would decrease drastically in rigidity or strength. On the other hand, in order to maintain the rigidity or strength, entire weight of the pipe would be increased and the cost of producing such a pipe is considerably very high.
It is an object of the present invention to provide a shooting pipe with a non-circular cross-section which would resolve the a~orementioned problems.
Moreover the conventional method for repairing the 10~ 8 furnace lining requires at least some number of operators under high radiation heat conditions and since the pipe is manually operated, the operators are subject to heavy labor.
Therefore it is another object of the present invention to provide a gunning apparatus which is provided with the above shooting pipe and desired mechanism which can manipulate the shooting pipe automatically.
Accordingly, the present invention, as herein claimed, is an apparatus for repairing the lining of a furnace, especially a DH furnace and a RH furnace, essentially comprising a movable transport car, a vertically disposed shooting pipe mounted on the car, an elevating mechanism on the car for raising and lowering said shooting pipe and a rotating mechanism on said car for rotating said shooting pipe. According to the invention, the shooting pipe has a non-circular hollow cross-section and is unrotata~le relative to the elevating mechanism and therefore is rotated by the rotating mechanism by way of the elevating mechanism whereby the shooting pipe is manipulated - without wea~ening the rigidity or strength thereof which usually occurs on a circular shooting pipe which requires key-ways for rotation thereof.
Preferably, the shooting pipe has a polygonal, oblong circular, liP-shaped or rectangular hollow cross-section.
Embodiments of the invention will now be dèscribed with reference to the appended drawings wherein:
Fig. 1 is a side view with a part in cross-section of the gunning apparatus of the first embodiment of this invention.
Fig. 2 i5 an enlarged cross-sectional view of the above apparatus taken on line I-I of Fig. 1.
3~ Fig. 3 is an enlarged cross-sectional view of the above apparatus taken on line II-II of Fig. 1.
Fig. ~ is a side view with a part in cross-section of i - 1094798 the gunning apparatus of the second embodiment of this invention.
Fig. 5 is an enlarged cross-sectional view of the above apparatus ta~en along the line III-III of Fig. 4.
Flg. 6A through Fig. 6I are cross-sectional views of `
the non-circular shooting pipes applicable to the apparatus of this invention.
' Fig. 7 is a side view with a part in cross-section of the modification of the apparatus of either first or second embodiment which is provided with a non-circular shooting pipe of a duplicate-pipe construction.
Fig. 8 is an enlarged cross-sectional view of the above apparatus taken along the line IV-IV of Fig. 7. ~`
Fig. 9 is an enlarged cross-sectional view of the above apparatus taken along the line ~-V-of Fig. 7.
Fig. 10 is an enlarged cross-sectional view of the above apparatus taken along the line VI-VI of Fig. 7.
Fig. 11 is a partial side view with a portion in cross-section of the apparatus of the third embodiment of this invention.
Fig. 12 is an enlarged rear end view of the above appara~us ~aken along the line VIT-VII of Fig. 11.
:,.'.5 `. . . ~, . .. ~ . . _ ___,_, _ __ ; `` 10~4798 Fig. 13 is another enlarged rear end view of the above apparatus taken along the line VIII-VIII of Fig. 11.
Fig. 14 is a front view with a part broken away of the apparatus of the fourth embodiment of this invention.
Fig. 15 is a front view of the above apparatus rcrair-ing a DH furnace.
Fig. 16 is a front view of the above apparatus repair-ing a RH furnace.
Fig. 17 is a perspective view of the above apparatus in operation The apparatus for repairin~ the furnace lining of this invention which is provided with the improved type of shooting pipe is hereinafter disclosed in the following embodiments in conjunction with the attached drawings.
The gunning device of the first embodiment is shown in Fig. 1 through Fig.3 and is generally used for the repairing of the lining of a converter furnace or an open-hearthfurnace.
In the drawings, a support column 2 is rotatably mount-ed on a transport car 1 which in turn is provided with four wheels 3 for facilitating the mohility of transport car 1.
A rocking sleeve 4 is tiltably mounted on the top of the support column 2 and a long rigid shooting pipe 5 having the non-circular hollow cross section thereof is slidably disposes in the rocking sleeve 4.
A spray nozzle 6 is fixed to the front end of the shooting pipe 5 while a hose 7 is rotatably cannected with the pipe 5 by means of a swivel joint 8.
~ he hose 7 is connected to a suitable mixer (not shown in the drawin~) arranged to supply refractory material in proper form for spraying.
In this invention, the rotating means for rotating the support column 2 on the vextical axis thereof comprises a worm ` ;; ~ ` 1094798 wheel 9 fixedly secured to the base portion of the support column 2, a worm gear 10 which is meshed with the worm wheel 9 on the same level, a drive means such as a power-operated motor for driving the worm wheel 10.
Numeral 12 indicates a tilting means such as a hydrau-lic cylinder for causing the rocking movement of the rocking sleeve 4 and this hydraulic cylinder 12 is diagonally disposed on the transport car 1 while numeral 13 indicates a pivot shaft which pivotally connects the rocking sleeve 4 to the support -collumn 2.
The rotating means for rotating the non-circular shoot-ing pipe 5 of this embodiment comprises a spur wheel 14 which receives the shooting pipe 5 slidably but unrotatably by way of slide bearing 15, a spur gear 16 which meshes ~ith the spur wheel 14, a drive means 17 such as a power-operated motor which is mounted on the front end of the rocking sleeve 4 for rotating the spur gear 16.
The means for causing the shooting pipe 5 to move towards or away from the furnace (not shown in the drawing) or relative to the roc~ing sleeve 4 is disposes at the rear end of the rocking sleeve 4 and comprises guide rollers 18 which rotate firmly on either side of the non-circular shooting pipe 5 so as to move the non-circular shooting pipe 5 back and forth at opposite sides, a drive means 19 such as a power-operated motor for driving guide rollers by way of gear means 20 ana a r~tating circular plate 21 which is rotatably mounted on the flange portion of the rocking sleeve 4 for integrally rotating guide rollers 18, drive means 19, and gear means 20 with shoot-ing pipe 5 relative to r.ocking sleeve 4 which are all mounted on the circular plate 21.
At each longitudinal end of the rocking sleeve 4, a duplicate bearing 22 are provided wherein outer bearin~s allow ```` ` 10~4798 the rotation of the non-circular shooting pipe 5 relative to the rocking sleeve 4.
In fig. 4 and Fig. 5, the second embodiment of the gunning apparatus which is provided with the non-circular shoot-in~ pipe of this invention is discloses wherein the improvement is characterized in that the means for rotating the non-circular rotating pipe 5 relative to the rocking sleeve 4 and a means for moving back and forth the shooting pipe 5 along and within the rocking sleeve 4 are both integrally assembled at the rear end of the rocking sleeve.
The gunning apparatus of this embodiment is further provided with a gear mechanism for permitting the rockin~ move-ment of the rocking sleeve instead of the hydraulic cylinder of the first embodim~nt.
In the assembled construction of rotating and slide means shown in Fig. 4, a drive means 17' for rotating the shoot-ing pipe 5 is mounted on the rocking sleeve 4 and has a spur gear 16' fixed to the drive shaft thereof. This spur gear 16' is meshed with a toothed circular plate 21' which is rotably mounted on the rear flange portion of the rocking sleeve 4. The toothed circular plate 21' is provided with a slide bearing 15' at the center thereof for facilitating-the smooth lengthwise movement of the shooting pipe ~. The toothed circular plate 21' is further provided with means for moving the shcoting pipe 5 back and forth within and along the rocking sleeve 4 which comprises ~uide roller means 18' and a drive means 19' for driviny the guide roller means 18' by way of gear means 20', Refering to the means for permitting the rocking move-ment of the rocking sleeve 4, numeral 23 indicates a spur qear which is fixedly secured to the drive shaft 24 of a drive means (not shown in the dra~ing). This spur gear 23 is meshed with a semi-circular spur wheel 25 secured to the lower portion of `` ~094798 the rockin~ sleeve ~.
In the above emhodiments, non-circular shootin~ pipe 5 has the cross sections disclosed in Fig. 6, These non-circu-lar or polygonal hollow cross sections have at least one sliding guide surface 5a thereof respectively for preventing the rota-- tion thereof on their lon~itudinal axis. The shooting pi~e 5 of this invention may be constructed by a plurality of non-cir-cular pipes so that the shooting pipe 5 can be extended or retract-e~ in a telescopic manner whereby the lengthwise slide movement of the shooting pipe 5 is further im~rove~.
Fig. 9 shows such a construction of the shooting pipe which is tclescopically extended or retracted in two stages, wherein numeral 5-1 indicates a secondary pipe which slidably but unrotatably encloses a primary shooting pipe 5.
For the above purpose, the primary a~d secondary pipes 5 and 5-1 have the corresponding hollow square cross sections.
The shooting pipe may be further telescopically construct-ed such that each inner pipe has at least one contacting point on the rotating locus thereof which contacts with inner surface of the outer pipe so that each contactinq point worlcs as a means for preventing the rotation of the inner pipe as well as a means for guiding the reciprocation of the inner pipe.
Fig. 6A through Fig. 6J show various cross sections which are suitable as a cross section of the shooting pipe of this invention wherein the experiment has proved that the shoot-ing pipes having the cross sections shown in Fig. ~ through Fig. 6D are most suitable and have following advanta~es;
i) The refractory material in either wet or dry form can smoothly pass through the pipe.
3~ii) The refractory material does not adhere to the inner surface of the pipe.
iii) The pipe can maintain high ri~ y thereof.
"": ` 109~798 . ~ ,.
To recapitulate the o~eration of the apparatus of the first and second embodiments, the support column is rotatably mounted on the transport car by means of the drive means and conbination of the worm gear and worm wheel so that the shoot-ing pipe is also rotated on the vertical axis of the support column while the hydraulic cylinder or the gear mechanism which comprises the semi-circular wheel and the drive gear is capable of rocking the rocking sleeve so that the spray nozzle fixed to the extremity of the shooting pipe can be displaced vertically within che furnace. The shooting pipe is also rotated on the axis thereof within and relative to the rocking sleeve by either a combination of the drive means, gear means and circular rotat-ing plate or a combination of drive means, gear means and circu-lar rotating plate so that the spraying dlrection of the spray nozzle is displaced at an angle of 360 degrees while the shoot-ing pipe is furthermore movable back and forth within and rela-tive to the rocking sleeve so that the shooting pipe can be displaced in a lengtwise direction within and relative to the furnace.
Therefore, the shooting pipe, or more particularly the spray nozzle fixed to the front end of the shooting pipe can be moved verticall~v and horizontally while the pipe can be also mov-ed back and forth whereby the operation for repairing the furna-ce lining is conducted mechanically and automatically by a remo-te control means (not shown in drawings).
The third embodiment of the gunninq apparatus of this invention is described hereinafter in conjunction with the attach-ed drawings, Fig. ll through Fig. 13 wherein the improvement is characterized in that the rocking sleeve and the shooting pipe are integrally rotated without rotating the shootinq pipe rela-tive to the roc~inq sleeve as disclosed in the first embodiment.
As shown in Fig. 11, the means for rotating the shoot-~ ` 1094798 .. ..
ing pipe 5 is constructed such that a slide ring 26 ~Jhich is pivotally mounted on the top of the support column 2 by a pivot pin rotatably receives the middle portion of the rocking sleeve 4. Adjacent to the slide ring 26, a spur wheel 27 is fixedly secured around the rocking sleeve 4, This spur wheel 27 is meshed with a spur gear 28 fixed to the drive shaft of a drive means 29 such as a power-operated motor which is fixedly mount-ed on the top portion of the slide ring 26.
Another slide ring 30 is rotatably mounted on the rocking sleeve 4 in place and has a lug 31 formed at the lower portion thereof. An actuating rod 32 of a diagonally disposed hydraulic cylinder 33 is pivotally connected by a pin 34 to the above lug 31 while the distal end of the cylinder 33 is pivo-tally secured to a lug 35 formed to the side of support column
2.
Refering to the means for moving the shooting pipe 5 back and forth relative to the rockin~ sleeve 4, the construction of the means of the third embodiment corresponds with the cons-truction of previous embodiments with the exception of spring means 36 which biasingly urge the guide rollers 18" so that the rollers 18" can move the shooting pipe 5 without causing the slip between surface of rollers 18" and flat longitudinal sur-face of the shooting pipe 5.
According to the gunning apparatus of this invention, since the spray nozzle of the shooting pipe can be easily manu-pilated vertically and horizontally as well as in a lengthwise direction whereby the operation for repairing the furnace lining is mechanically conducted at the place of operation remote from the vicinity of furnace which is subject to the hiqh-temperature radiation from the furnace.
The fourth embodiment relates to a gunning apparatus which is characterized in that the gunning apparatus is construct-'.'`. ` " 1094798`;` .
ed such that it can repair the lining of a reactor furnace such as a DH furnace ~Fig. 15) and a RH furnace (Fig.16).
A typical structure of the apparatus of this embodiment is descri~ed in great detail in conjunction with the attached drawings.
Referring to Figs.14 to 17, numeral 41 (Fig.15) indi-cates a DH furnace, numeral 41a (Fig.16) indicates an RH furna-ce, numerals 42 and 42a indicate observation windows through which a viewer can observe the spraying operation within the fur-nace 41 and 41a and which is disposed on an upper working dec~such as the working deck 43 over the furnace 41a. Numerals 44 and 45 in Fig.16 respectively indicate a suction pipe and a dis-charge pipe of the furnace 41a. Numeral 44a in Fig.15 indicates a suction pipe.
With respect to the apparatus which has been devised to enable the optimum degree of repair operations to th~ furnace, numeral 46 indicates rails laid on a lower working dec~ 47, nu-meral 48 indicates a transport car which is movable on the rails 4-6 and which carries the spraying device thereon, and numeral 49 indicates a hose for supplying refractory material in a wet slurry form through a shooting pipe S0 of non-circular cross sec-tion to a spray nozzle 51 which is attached to the top of the shooting pipe 50. The mechanism for rotating the non-circular shooting pipe 50 comprises an inner hollow cylindrical body 52 which permits elevation but which restricts rotation of the spray pipe 50 relative to the cylindrical body 52, a circular bearinq means 53 mounted on the transport car 48 and which rotatably supports the inner cylindrical body 52, an outer cylindrical support frame 54 mounted on the car ~8 and which also rotatably
Refering to the means for moving the shooting pipe 5 back and forth relative to the rockin~ sleeve 4, the construction of the means of the third embodiment corresponds with the cons-truction of previous embodiments with the exception of spring means 36 which biasingly urge the guide rollers 18" so that the rollers 18" can move the shooting pipe 5 without causing the slip between surface of rollers 18" and flat longitudinal sur-face of the shooting pipe 5.
According to the gunning apparatus of this invention, since the spray nozzle of the shooting pipe can be easily manu-pilated vertically and horizontally as well as in a lengthwise direction whereby the operation for repairing the furnace lining is mechanically conducted at the place of operation remote from the vicinity of furnace which is subject to the hiqh-temperature radiation from the furnace.
The fourth embodiment relates to a gunning apparatus which is characterized in that the gunning apparatus is construct-'.'`. ` " 1094798`;` .
ed such that it can repair the lining of a reactor furnace such as a DH furnace ~Fig. 15) and a RH furnace (Fig.16).
A typical structure of the apparatus of this embodiment is descri~ed in great detail in conjunction with the attached drawings.
Referring to Figs.14 to 17, numeral 41 (Fig.15) indi-cates a DH furnace, numeral 41a (Fig.16) indicates an RH furna-ce, numerals 42 and 42a indicate observation windows through which a viewer can observe the spraying operation within the fur-nace 41 and 41a and which is disposed on an upper working dec~such as the working deck 43 over the furnace 41a. Numerals 44 and 45 in Fig.16 respectively indicate a suction pipe and a dis-charge pipe of the furnace 41a. Numeral 44a in Fig.15 indicates a suction pipe.
With respect to the apparatus which has been devised to enable the optimum degree of repair operations to th~ furnace, numeral 46 indicates rails laid on a lower working dec~ 47, nu-meral 48 indicates a transport car which is movable on the rails 4-6 and which carries the spraying device thereon, and numeral 49 indicates a hose for supplying refractory material in a wet slurry form through a shooting pipe S0 of non-circular cross sec-tion to a spray nozzle 51 which is attached to the top of the shooting pipe 50. The mechanism for rotating the non-circular shooting pipe 50 comprises an inner hollow cylindrical body 52 which permits elevation but which restricts rotation of the spray pipe 50 relative to the cylindrical body 52, a circular bearinq means 53 mounted on the transport car 48 and which rotatably supports the inner cylindrical body 52, an outer cylindrical support frame 54 mounted on the car ~8 and which also rotatably
3~ supports the inner cylindrical body 52, a worm gear 55 fixedly secured to the lower portion of the inner cylindrical body 52, and a worm gear 56 which is rotated by a power-opera~ed motor _9_ ; '` 10~
~" ~
57 and which engages and drives the worm gear 55. The mechanism to elevate the non-circular shooting pipe 50 comprises elevating rollers 58 which contact and press against the spray pipe 50 from both sides, a power operated motor 59 mounted on the cylindrical body 52 and which effects rotation of the two rollers 58, and supporting rollers 70 mounted on the cylindrical body 52, which rotatably support the shooting pipe 50.
Numeral 71 (Fig.14) indicates a remote control means which is usually manipulated by an operator who stands on the lower working dec~, and numeral 72 (Fig.13) indicates a power operated means to move the transport car 48 along the rails 46.
~" ~
57 and which engages and drives the worm gear 55. The mechanism to elevate the non-circular shooting pipe 50 comprises elevating rollers 58 which contact and press against the spray pipe 50 from both sides, a power operated motor 59 mounted on the cylindrical body 52 and which effects rotation of the two rollers 58, and supporting rollers 70 mounted on the cylindrical body 52, which rotatably support the shooting pipe 50.
Numeral 71 (Fig.14) indicates a remote control means which is usually manipulated by an operator who stands on the lower working dec~, and numeral 72 (Fig.13) indicates a power operated means to move the transport car 48 along the rails 46.
Claims (5)
1. In an apparatus for repairing the lining of a furnace, especially a DH furnace and a RH furnace comprising a movable transport car, a vertically disposed shooting pipe mounted on said car, an elevating mechanism on said car for raising and lowering said shooting pipe and a rotating mechanism on said car for rotating said shooting pipe, the improvement characterized in that said shooting pipe has a non-circular hollow cross-section and said shooting pipe is unrotatable relative to said elevating mechanism and therefore is rotated by said rotating mechanism by way of said elevating mechanism where by said shooting pipe is manipulated without weakening the rigidity or strength thereof which usually occurs on a circular shooting pipe which requires keyways for rotation thereof.
2. An apparatus according to claim 1, wherein said shooting pipe has a polygonal hollow cross-section.
3. An apparatus according to claim 1, wherein said shooting pipe has an oblong circular hollow cross-section.
4. An apparatus according to claim 1, wherein said shooting pipe has a lip-shaped hollow cross-section.
5. An apparatus according to claim 1, wherein said shooting pipe has a rectangular hollow cross-section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA351,018A CA1094798A (en) | 1975-12-25 | 1980-04-30 | Apparatus for repairing the furnace lining with a shooting pipe of non-circular hollow cross section |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JPSHO50-158436 | 1975-12-25 | ||
| JP50158436A JPS595824B2 (en) | 1975-12-25 | 1975-12-25 | Simple gunning device for spraying fireproofing materials |
| CA268,003A CA1094312A (en) | 1975-12-25 | 1976-12-16 | Apparatus for repairing the furnace lining with a shooting pipe of non-circular hollow cross section |
| CA351,018A CA1094798A (en) | 1975-12-25 | 1980-04-30 | Apparatus for repairing the furnace lining with a shooting pipe of non-circular hollow cross section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1094798A true CA1094798A (en) | 1981-02-03 |
Family
ID=27164827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA351,018A Expired CA1094798A (en) | 1975-12-25 | 1980-04-30 | Apparatus for repairing the furnace lining with a shooting pipe of non-circular hollow cross section |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1094798A (en) |
-
1980
- 1980-04-30 CA CA351,018A patent/CA1094798A/en not_active Expired
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