CA1222868A - Method and apparatus for changing the pallets of a sinter machine - Google Patents
Method and apparatus for changing the pallets of a sinter machineInfo
- Publication number
- CA1222868A CA1222868A CA000457328A CA457328A CA1222868A CA 1222868 A CA1222868 A CA 1222868A CA 000457328 A CA000457328 A CA 000457328A CA 457328 A CA457328 A CA 457328A CA 1222868 A CA1222868 A CA 1222868A
- Authority
- CA
- Canada
- Prior art keywords
- tracks
- pallet
- pallets
- sinter machine
- used pallet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/38—Arrangements of devices for charging
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
- C22B1/20—Sintering; Agglomerating in sintering machines with movable grates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
- F27B21/06—Endless-strand sintering machines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/12—Travelling or movable supports or containers for the charge
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/12—Travelling or movable supports or containers for the charge
- F27D2003/121—Band, belt or mesh
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Manufacturing & Machinery (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE:
A method and an apparatus for changing the pallets of a sinter machine are disclosed. The sinter machine is of the type in which a train of pallets are moved on wheels along upper rails from the feed end to the discharge end of the sinter machine and returned along lower rails to the feed end and in which the pallets are transferred from the lower rails to the upper rails by means of a lifting wheel. The method comprises the steps of raising a used pallet from the lifting wheel, placing a pair of tracks underneath the wheels of the raised used pallet and depositing the used pallet onto the tracks, lowering the end of the tracks remote from the sinter machine to floor level and discharging the used pallet from the tracks, raising the end of the tracks to the level of a stand facing the feed end of the sinter machine and supporting a new pallet and rolling the new pallet from such stand onto the tracks, clamping the new pallet, moving the tracks out of the way, and lowering the new pallet into the sinter machine.
A method and an apparatus for changing the pallets of a sinter machine are disclosed. The sinter machine is of the type in which a train of pallets are moved on wheels along upper rails from the feed end to the discharge end of the sinter machine and returned along lower rails to the feed end and in which the pallets are transferred from the lower rails to the upper rails by means of a lifting wheel. The method comprises the steps of raising a used pallet from the lifting wheel, placing a pair of tracks underneath the wheels of the raised used pallet and depositing the used pallet onto the tracks, lowering the end of the tracks remote from the sinter machine to floor level and discharging the used pallet from the tracks, raising the end of the tracks to the level of a stand facing the feed end of the sinter machine and supporting a new pallet and rolling the new pallet from such stand onto the tracks, clamping the new pallet, moving the tracks out of the way, and lowering the new pallet into the sinter machine.
Description
~ ~
METHOD AND APPARATUS FOR CHANGING. THE ~?ALLETS
OF A SINTE~i~ MA.CHINE
This in~ention relates to a method and an apparatus for changing the pallets of a sinter machine when such pallets are damaged~
Sinter machines of the endless type including a train of pallets which move on upper rails from the feed end to the discharge end of the machine are well known. As they move along the upper rails, the pallets pass over wind boxes for sintering the ~oncentrate loaded on the pallets. The sintered concentrate is discharged at the discharge end of the machine and the pallets mOve back to the feed end of the machine along lower rails.
The pallets are transferred from the lower rails to the upper rails ~y means of a lifting wheel located at the feed end of the machine and are guided during such transfer by guide rails following the arcuate path of the lifting wheel.
The pallets are provided wi:th grate bars which support the concentrate while allow~ng passage of hot gases therethrough for sintering the concentrate. These grate bars must ~e regularly replaced and this operation requires removal of the pallets from the sinter machine.
The pallets are normally changed using overhead cranes and tne whole operation is time consuming and hazardous for the operators.
w~
~22136~
It is therefore the. ohject o~ the presenk invention to provide a novel method and apparatus for changing pallets which is safer and less time consuming than the conventional procedure.
The method, in accordance with the presenk - inven~ion, comprises the steps of raising a used pallet from the lifting wheel, placing a pair of tracks underneath the wheels of the raised used pallet and depositing the used pallet onto the tracks, lowering the end of the tracks remote from the sinter machine to floor level and discharging the used pallet from the tracks,raising the same end of the tracks to the level of a stand facing the feed end of the sinter machine and supporting a new pallet, rolling the new pallet from such stand onto the tracks, clamping the new pallet, moving the tracks out of the way, and lowering the new pallet into the sinter machine.
The.apparatu~ for carrying out the above method comprises means for raising the used pallets from the lifting wheel, a pair of tracks adapted to be positioned underneath.the wheels of the raised used pallets for depositing the used pallets thereon and rolling it out, a stand facing the feed end of the sinter machine for holding a new pallet, means for lowering the end of the tracks remote from the sinter machine to floor level to allow discharge of the used pallet from the ~racks and for raising the erd of the tracks to the level of the stand for rolling the new pallet from the stand . .
~22~
_ 3 _ onto the tracks to a cla~ping posi,tion, whe~eb~ the new pallet may ~e ~nserted ~nto the sinte,~ machine, The means for raising used pallets is preferably a portion of the guide rails and include means fo~
pivotally mounting the upper end of each guide rail portion, an hydraulic cylinder for pivoting the lower end of such guide rail portion, and clamping means mounted on such guide rail portion for clamping the used pallets.
An end stop is pre~erabl~ located at the end of each track remo~e from the sinter machine for preventing rolling out o~ the used pallets from the tracks during lowering of such end portion of the tracks. ~ center stop is preferably located on the floor for allowin~
release of the end stops and discharge of the used pallets from the tracks.
The invention will be disclosed,b~ way of example, with reference to a preferred embodiment illustrated in the accompanying drawings in which:
Figure 1 ~llustrates a ~ront view o~ the pallet changing apparatus in accqrdance with the invention;
Figures 2, 3, 6~ 8 and 11 illustrate diagrammetric side views of the feed end of the sinter machine showing the pallet changing apparatus during its various steps of operation;
Figures 4 and 5 show end and side views of the end stops of the pal~et changing apparatus~
Figure 7 shows a side view of the center stop of the pallet changing apparatus; and Figures 9 and 10 show end and side view of the pallet contact stopper.
Referring to Figure 1 of the dra~ings, there is shown an embodiment of the pallet changing apparatus comprising a mechanism 10 located on each side of the sinter machine for removing the pallets from the lifting wheel 12 of the sinter machine. Also shown ls a track 14 located on each side of the sinter machine for rolling out a used pallet and rolling in a new pallet.
There is further shown two stands 16 for supporting a new pallet prior to insertion into the sinter machine and two lower stands 17 for receiving an old pallet when removed from the sinter machine. At the center of the pallet changing apparatus is a center stop 18 which is used to discharge the used pallet from the tracks 14 as it will be disclosed in detail later.
Referring to Figure 2 of the drawings, there is shown a schematic side view of the feed end of the slnter machine showing the lifting wheel 12 in the process of transferring a pallet from the lower rails to the upper rails of the sinter machine follo~ing a pair of guide rails 19 located one on each side of the sinter machine. It is to be understood that a series of pallets would be moved together by the lifting ~5 wheel although a single pallet is illustrated~ A portion 20 of each guide rail is cut and equipped with the mechanism 10 for removi~g the pallets from the lifting wheel. ~he portion 2n of each guide rail is pivotally mounted on a ~2~
sup~ort 22 secur~d to the existing structure of the sinter plant. ~he po.~tion 20. o~ e.ach.~uide .rail ~$ RiYoted b~ a~
hydraul~c cy~l~nder 24 whic~ is maunted on a support 26 attached to the e~isting structure of the sinter plant and ~aving a piston connected to a movable bracket 28 which ~s itself connected to a rod 30 pivotally mounted to the lower end of the guide rail portion 20. The lower end of each.guide rail portion 20 is provided with a locking device 3~ for securing it to the remaining portion of the guide rail during normal operation. A clamping mechanism including two jaws 34 operated by an hydraulic cylinder 36 is mounted on each guide rail portian 20.
A safety bar 38 is provided for locking the jaws in the open position.
As a ~irst step in the operat;~.on of th.e pallet changing apparatus, locking devices 32 are released to free the guide rail portions 20 and safety bars 38 are also released allowing operation of the hydraulic cylinders 36 to clamp the pallet axles behind wheels 40. The h~draulic cylinders 24 are then operated to raise the pallet from the li~ting wheel as sho~n i~ Figure 3 of the drawingsO
As a second s.tep in the operation of the pallet changing apparatus, the pair of tracks 14 is positioned underneath the wheels of the pallets. In the present em~odiment of the invention, the end of each track which is close to the sinter machine is supported by a structure 4~ ~hich is pivotally connected at one end to the side of the track and at its other end to a base 43 on the floor and is operated laterally by the piston o a hydraulic ~2~
cylinder 44 (Figure 11 ta swing that end of the track into alignment ~th.the guide rail 20 to so mo~e that end o the track underneath the wheels 40 of the pallet.
The end of each track ~lich.is remote from the feed end o~ the sinter machine is connected to the piston of a hydraulic cyli:nder 46 which is operated to rais~ that end of the track ~rom ground level to the level of stand 16, To lower the pallet onto the tracks 14 hydraulic cylinders 24 are operated in the reversP direction.
Hydraulic cylinders 36 are subsequently operated in the reverse direction to unclamp the used pallet.
As a third step in the operation of the pallet changing a~paratus, the pallet is rolled out manually to contact an end stop 48 ~hich is located at the end of each track 14. As shown in Figures 4 and 5, each end stop 48 is mounted on a shaft 50 which is pivotally mounted in lugs 52 secured to the outside walls of each track. The end stops are manually operated to the position illustrated in Figures 4 and 5. When the pallet is in contact with end stops 48, the hydraulic cylinders 46 are operated to lo~er the tracks to the floor level as shown in Figure 6 of the drawings, After lowering of the tracks 7 the pallet (which weights abaut three tons) exerts sufficient pressure to make the release of the end stops difficult if not impossible. As shown more clearly in Figure 7, the centre stop 18 is therefore operated by an hydraulic cylinder 54 mounted on the sinter ~achine supporting structure to release the ~,,';2~2~6~
pressure on the end stops 48 which may then be manually pivated out oE the way, r'h~ hydr~ulic cylinder 54 i5 subsequently released to let tKe pallet roll out to the position shown ~n dashed line.
The la~t step in the OperatiQn of the pallet changiny apparatus is to introduce a ne~ pallet, which is preferably positioned on the stand 16 in advance, into the sinter machine. To that effect, the ends of the tracks 14 are raised to the level of the stand and the new pallet is advanced ~y hand against contact pallst stoppers 56 as shown in Figure 8. The contact stoppers not only prevent the pallet from overspeeding but also provide the added bene~it of straightening and aligning the pallet t SO as to facilitate clamping. As shown in Figures 9 and 10, only in order to si~lplify the drawings, each pallet stopper 56 is mounted on a shaft 58 which is pivoted in lugs 60 secured to the side of each track. Each pallet stopper is operated by an air actuator 62 through a piston 64 connected to an arm 66. Once the pallet is properly ali~ned, the contact pallet stoppers are released and the pallet pushed against ~inal stoppers 68 located one on each track and operated by a mechanism (not shown) identical to the one illustrated in Figures 9 and 10.
The cylindrical cyllnders 24 and 36 are then operated to clamp the new pallet. The hydraulic cylinders 46 are subsequently operated to lower the end of the tracks remote ~rom the sinter machine to ground level. The ~Z~6~3 hydraulic cvlinders 44 connected to the track supporting structures 42 are also operated to rnove ~he tracks out of the way 50 that the new ~allet may be inserted into the liting wheel by operatian o~ the hydraulic cylinders 24. The h~draulic cylinders 36 are finally operated to release the jaws 34 and the safety bar moved dawn -to lock the jaws in the open pQsition as shown in Figure 11 of the drawings.
Although the invention has been disclosed with reference to a preferred embodiment, it is to be under-stood that various alternatives to such embodiment are envisaged within the scope of the following cla;ms.
METHOD AND APPARATUS FOR CHANGING. THE ~?ALLETS
OF A SINTE~i~ MA.CHINE
This in~ention relates to a method and an apparatus for changing the pallets of a sinter machine when such pallets are damaged~
Sinter machines of the endless type including a train of pallets which move on upper rails from the feed end to the discharge end of the machine are well known. As they move along the upper rails, the pallets pass over wind boxes for sintering the ~oncentrate loaded on the pallets. The sintered concentrate is discharged at the discharge end of the machine and the pallets mOve back to the feed end of the machine along lower rails.
The pallets are transferred from the lower rails to the upper rails ~y means of a lifting wheel located at the feed end of the machine and are guided during such transfer by guide rails following the arcuate path of the lifting wheel.
The pallets are provided wi:th grate bars which support the concentrate while allow~ng passage of hot gases therethrough for sintering the concentrate. These grate bars must ~e regularly replaced and this operation requires removal of the pallets from the sinter machine.
The pallets are normally changed using overhead cranes and tne whole operation is time consuming and hazardous for the operators.
w~
~22136~
It is therefore the. ohject o~ the presenk invention to provide a novel method and apparatus for changing pallets which is safer and less time consuming than the conventional procedure.
The method, in accordance with the presenk - inven~ion, comprises the steps of raising a used pallet from the lifting wheel, placing a pair of tracks underneath the wheels of the raised used pallet and depositing the used pallet onto the tracks, lowering the end of the tracks remote from the sinter machine to floor level and discharging the used pallet from the tracks,raising the same end of the tracks to the level of a stand facing the feed end of the sinter machine and supporting a new pallet, rolling the new pallet from such stand onto the tracks, clamping the new pallet, moving the tracks out of the way, and lowering the new pallet into the sinter machine.
The.apparatu~ for carrying out the above method comprises means for raising the used pallets from the lifting wheel, a pair of tracks adapted to be positioned underneath.the wheels of the raised used pallets for depositing the used pallets thereon and rolling it out, a stand facing the feed end of the sinter machine for holding a new pallet, means for lowering the end of the tracks remote from the sinter machine to floor level to allow discharge of the used pallet from the ~racks and for raising the erd of the tracks to the level of the stand for rolling the new pallet from the stand . .
~22~
_ 3 _ onto the tracks to a cla~ping posi,tion, whe~eb~ the new pallet may ~e ~nserted ~nto the sinte,~ machine, The means for raising used pallets is preferably a portion of the guide rails and include means fo~
pivotally mounting the upper end of each guide rail portion, an hydraulic cylinder for pivoting the lower end of such guide rail portion, and clamping means mounted on such guide rail portion for clamping the used pallets.
An end stop is pre~erabl~ located at the end of each track remo~e from the sinter machine for preventing rolling out o~ the used pallets from the tracks during lowering of such end portion of the tracks. ~ center stop is preferably located on the floor for allowin~
release of the end stops and discharge of the used pallets from the tracks.
The invention will be disclosed,b~ way of example, with reference to a preferred embodiment illustrated in the accompanying drawings in which:
Figure 1 ~llustrates a ~ront view o~ the pallet changing apparatus in accqrdance with the invention;
Figures 2, 3, 6~ 8 and 11 illustrate diagrammetric side views of the feed end of the sinter machine showing the pallet changing apparatus during its various steps of operation;
Figures 4 and 5 show end and side views of the end stops of the pal~et changing apparatus~
Figure 7 shows a side view of the center stop of the pallet changing apparatus; and Figures 9 and 10 show end and side view of the pallet contact stopper.
Referring to Figure 1 of the dra~ings, there is shown an embodiment of the pallet changing apparatus comprising a mechanism 10 located on each side of the sinter machine for removing the pallets from the lifting wheel 12 of the sinter machine. Also shown ls a track 14 located on each side of the sinter machine for rolling out a used pallet and rolling in a new pallet.
There is further shown two stands 16 for supporting a new pallet prior to insertion into the sinter machine and two lower stands 17 for receiving an old pallet when removed from the sinter machine. At the center of the pallet changing apparatus is a center stop 18 which is used to discharge the used pallet from the tracks 14 as it will be disclosed in detail later.
Referring to Figure 2 of the drawings, there is shown a schematic side view of the feed end of the slnter machine showing the lifting wheel 12 in the process of transferring a pallet from the lower rails to the upper rails of the sinter machine follo~ing a pair of guide rails 19 located one on each side of the sinter machine. It is to be understood that a series of pallets would be moved together by the lifting ~5 wheel although a single pallet is illustrated~ A portion 20 of each guide rail is cut and equipped with the mechanism 10 for removi~g the pallets from the lifting wheel. ~he portion 2n of each guide rail is pivotally mounted on a ~2~
sup~ort 22 secur~d to the existing structure of the sinter plant. ~he po.~tion 20. o~ e.ach.~uide .rail ~$ RiYoted b~ a~
hydraul~c cy~l~nder 24 whic~ is maunted on a support 26 attached to the e~isting structure of the sinter plant and ~aving a piston connected to a movable bracket 28 which ~s itself connected to a rod 30 pivotally mounted to the lower end of the guide rail portion 20. The lower end of each.guide rail portion 20 is provided with a locking device 3~ for securing it to the remaining portion of the guide rail during normal operation. A clamping mechanism including two jaws 34 operated by an hydraulic cylinder 36 is mounted on each guide rail portian 20.
A safety bar 38 is provided for locking the jaws in the open position.
As a ~irst step in the operat;~.on of th.e pallet changing apparatus, locking devices 32 are released to free the guide rail portions 20 and safety bars 38 are also released allowing operation of the hydraulic cylinders 36 to clamp the pallet axles behind wheels 40. The h~draulic cylinders 24 are then operated to raise the pallet from the li~ting wheel as sho~n i~ Figure 3 of the drawingsO
As a second s.tep in the operation of the pallet changing apparatus, the pair of tracks 14 is positioned underneath the wheels of the pallets. In the present em~odiment of the invention, the end of each track which is close to the sinter machine is supported by a structure 4~ ~hich is pivotally connected at one end to the side of the track and at its other end to a base 43 on the floor and is operated laterally by the piston o a hydraulic ~2~
cylinder 44 (Figure 11 ta swing that end of the track into alignment ~th.the guide rail 20 to so mo~e that end o the track underneath the wheels 40 of the pallet.
The end of each track ~lich.is remote from the feed end o~ the sinter machine is connected to the piston of a hydraulic cyli:nder 46 which is operated to rais~ that end of the track ~rom ground level to the level of stand 16, To lower the pallet onto the tracks 14 hydraulic cylinders 24 are operated in the reversP direction.
Hydraulic cylinders 36 are subsequently operated in the reverse direction to unclamp the used pallet.
As a third step in the operation of the pallet changing a~paratus, the pallet is rolled out manually to contact an end stop 48 ~hich is located at the end of each track 14. As shown in Figures 4 and 5, each end stop 48 is mounted on a shaft 50 which is pivotally mounted in lugs 52 secured to the outside walls of each track. The end stops are manually operated to the position illustrated in Figures 4 and 5. When the pallet is in contact with end stops 48, the hydraulic cylinders 46 are operated to lo~er the tracks to the floor level as shown in Figure 6 of the drawings, After lowering of the tracks 7 the pallet (which weights abaut three tons) exerts sufficient pressure to make the release of the end stops difficult if not impossible. As shown more clearly in Figure 7, the centre stop 18 is therefore operated by an hydraulic cylinder 54 mounted on the sinter ~achine supporting structure to release the ~,,';2~2~6~
pressure on the end stops 48 which may then be manually pivated out oE the way, r'h~ hydr~ulic cylinder 54 i5 subsequently released to let tKe pallet roll out to the position shown ~n dashed line.
The la~t step in the OperatiQn of the pallet changiny apparatus is to introduce a ne~ pallet, which is preferably positioned on the stand 16 in advance, into the sinter machine. To that effect, the ends of the tracks 14 are raised to the level of the stand and the new pallet is advanced ~y hand against contact pallst stoppers 56 as shown in Figure 8. The contact stoppers not only prevent the pallet from overspeeding but also provide the added bene~it of straightening and aligning the pallet t SO as to facilitate clamping. As shown in Figures 9 and 10, only in order to si~lplify the drawings, each pallet stopper 56 is mounted on a shaft 58 which is pivoted in lugs 60 secured to the side of each track. Each pallet stopper is operated by an air actuator 62 through a piston 64 connected to an arm 66. Once the pallet is properly ali~ned, the contact pallet stoppers are released and the pallet pushed against ~inal stoppers 68 located one on each track and operated by a mechanism (not shown) identical to the one illustrated in Figures 9 and 10.
The cylindrical cyllnders 24 and 36 are then operated to clamp the new pallet. The hydraulic cylinders 46 are subsequently operated to lower the end of the tracks remote ~rom the sinter machine to ground level. The ~Z~6~3 hydraulic cvlinders 44 connected to the track supporting structures 42 are also operated to rnove ~he tracks out of the way 50 that the new ~allet may be inserted into the liting wheel by operatian o~ the hydraulic cylinders 24. The h~draulic cylinders 36 are finally operated to release the jaws 34 and the safety bar moved dawn -to lock the jaws in the open pQsition as shown in Figure 11 of the drawings.
Although the invention has been disclosed with reference to a preferred embodiment, it is to be under-stood that various alternatives to such embodiment are envisaged within the scope of the following cla;ms.
Claims (7)
1. A method for changing the pallets of a sinter machine of the type in which a train of pallets are moved on wheels along upper rails from the feed end to the discharge end of the sinter machine and returned along lower rails to the feed end, and in which the pallets are transferred from the lower rails to the upper rails by means of a lifting wheel, comprising the steps of:
a) raising a used pallet from the lifting wheel;
b) placing a pair of tracks underneath the wheels of the raised used pallet and depositing the used pallet onto the tracks;
c) lowering the end of the tracks remote from the sinter machine to floor level and discharging the used pallet from the tracks;
d) raising the end of the tracks to the level of a stand facing the feed end of the sinter machine and supporting a new pallet and rolling the new pallet from said stand onto the tracks;
e) clamping the new pallet;
f) moving the tracks out of the way, and g) lowering the new pallet into the sinter machine.
a) raising a used pallet from the lifting wheel;
b) placing a pair of tracks underneath the wheels of the raised used pallet and depositing the used pallet onto the tracks;
c) lowering the end of the tracks remote from the sinter machine to floor level and discharging the used pallet from the tracks;
d) raising the end of the tracks to the level of a stand facing the feed end of the sinter machine and supporting a new pallet and rolling the new pallet from said stand onto the tracks;
e) clamping the new pallet;
f) moving the tracks out of the way, and g) lowering the new pallet into the sinter machine.
2. A method as defined in claim 1, wherein the tracks are provided with end stops and wherein the used pallet is first rolled out to contact the end stops before lowering the tracks.
3. A method as defined in claim 2, wherein the used pallet is discharged using a center stop which is operated to free the end stops and is subsequently disengaged to discharge the used pallet.
4. An apparatus for changing the pallets of a sinter machine of the type in which a train of pallets are moved on wheels along upper rails from the feed end to the discharge end of the sinter machine, and are returned along lower rails to the feed end and in which the pallets are transferred from the lower rails to the upper rails by means of a lifting wheel and are guided during such transfer by means of a guide rail following the arcuate path of each end of said lifting wheel, comprising:
a) means for raising a used pallet from the lifting wheel;
b) a pair of tracks adapted to be mounted under-neath the wheels of the raised used pallet for depositing the used pallet thereon and rolling it out;
c) a stand facing the feed end of the sinter machine for holding a new pallet;
d) means for lowering the end of the tracks remote from the sinter machine to floor level to allow discharge of the used pallet from the tracks and for raising the end of the tracks to the level of said stand for rolling the new pallet from the stand onto the tracks to a clamping position, whereby the new pallet may be clamped and lowered into the lifting wheel.
a) means for raising a used pallet from the lifting wheel;
b) a pair of tracks adapted to be mounted under-neath the wheels of the raised used pallet for depositing the used pallet thereon and rolling it out;
c) a stand facing the feed end of the sinter machine for holding a new pallet;
d) means for lowering the end of the tracks remote from the sinter machine to floor level to allow discharge of the used pallet from the tracks and for raising the end of the tracks to the level of said stand for rolling the new pallet from the stand onto the tracks to a clamping position, whereby the new pallet may be clamped and lowered into the lifting wheel.
5. An apparatus as defined in claim 4, wherein said means for raising a used pallet is a portion of the guide rails and includes means for pivotally mounting the upper end of each guide rail portion, an hydraulic cylinder for pivoting the lower end of said guide rail portion, and clamping means mounted on said guide rail portion for clamping the used pallets.
6. An apparatus as defined in claim 5, further comprising an end stop located at the end of each track remote from the sintering machine for preventing rolling out of the used pallet from the tracks during lowering of the said one end of the tracks.
7. An apparatus as defined in claim 6, further comprising a center stop located on the floor level for allowing release of the end stops and discharge of the used pallet from the tracks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000457328A CA1222868A (en) | 1984-06-22 | 1984-06-22 | Method and apparatus for changing the pallets of a sinter machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000457328A CA1222868A (en) | 1984-06-22 | 1984-06-22 | Method and apparatus for changing the pallets of a sinter machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1222868A true CA1222868A (en) | 1987-06-16 |
Family
ID=4128159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000457328A Expired CA1222868A (en) | 1984-06-22 | 1984-06-22 | Method and apparatus for changing the pallets of a sinter machine |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1222868A (en) |
-
1984
- 1984-06-22 CA CA000457328A patent/CA1222868A/en not_active Expired
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