WO2000077119A1 - Dispositif superieur pour four a coke automatise - Google Patents

Dispositif superieur pour four a coke automatise Download PDF

Info

Publication number
WO2000077119A1
WO2000077119A1 PCT/US2000/015116 US0015116W WO0077119A1 WO 2000077119 A1 WO2000077119 A1 WO 2000077119A1 US 0015116 W US0015116 W US 0015116W WO 0077119 A1 WO0077119 A1 WO 0077119A1
Authority
WO
WIPO (PCT)
Prior art keywords
column
tube
bearing
cover
secured
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.)
Ceased
Application number
PCT/US2000/015116
Other languages
English (en)
Inventor
Allen S. Malsbury
Ronald T. Myszka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Foster Wheeler Inc
Original Assignee
Foster Wheeler Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Foster Wheeler Inc filed Critical Foster Wheeler Inc
Publication of WO2000077119A1 publication Critical patent/WO2000077119A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/18—Door frames; Doors, lids or removable covers
    • F27D1/1808—Removable covers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
    • B01J3/03—Pressure vessels, or vacuum vessels, having closure members or seals specially adapted therefor
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B25/00—Doors or closures for coke ovens
    • C10B25/02—Doors; Door frames
    • C10B25/08—Closing and opening the doors
    • C10B25/10—Closing and opening the doors for ovens with vertical chambers
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B25/00—Doors or closures for coke ovens
    • C10B25/20—Lids or closures for charging holes
    • C10B25/22—Lids or closures for charging holes for ovens with vertical chambers

Definitions

  • the present invention relates to automated top unheading devices for coke drums, and more particularly to a device for automatically lifting and swinging a top head cover away from a coke drum top head flanged opening .
  • Coking operations and delayed coking drums are well known in the refining industry, and the details thereof need not be set forth herein.
  • coke will accumulate on the inner walls of the drum and must be periodically removed. This is typically accomplished with a hydraulic cutter or "drill" that is lowered through an opening in top head of the drum.
  • the removal of the top head cover of the drum is a major task.
  • the top head cover is quite heavy. Therefore, its removal is cumbersome.
  • coking operations are carried out at high temperatures and pressures and produce hazardous vapors. Therefore, the top head cover can be quite hot and its removal can be dangerous if pressures remain high in the drum when the cover is released. Finally, its removal can release the hazardous vapors .
  • top head cover In normal operation, the top head cover would be unfastened by hand, and then removed by a winch. Generally, an operator would be required to be positioned on top of the drum to guide the top head cover, especially when it is replaced on the top head of the drum. Due to the conditions described above, this can be difficult and sometimes dangerous work. Therefore, it is desirable to provide for automated removal of the top head cover of a coke drum.
  • U.S. Patent No. 3,753,502 shows an automatic device for engaging and then subsequently turning and lifting off a cover for the charging shaft of a coking oven.
  • a horizontal support is carried on a rotary column, which is carried by a frame, which in turn is suspended from the support of a charge car.
  • a hydraulic cylinder connects through a piston rod to the rotary column in order to effect vertical movement of the rotary column.
  • a cam guide is separately fastened to the frame, and two rollers extend out from the column. As the column is lifted, engagement of the rollers and the cam guide causes the column to rotate, thereby shifting horizontally the support in order to swing the cover away from the charging shaft .
  • the complexity and large moment arms of this design would not be suitable for coke drum unheading.
  • U.S. Patent Nos . 4,455,660, 3,751,854 and 2,396,663 each illustrates a mechanism for removing a furnace lid in which the lid support can pivot on a vertical axis.
  • the mating surfaces of the furnace body and the furnace lid are inclined. Roller tracks on the lid and a support roller on a furnace body permit the lid to be swung horizontally relative to the furnace body by the pivoting overhead lid support in order to shift load from the track/ roller engagement to the lid support itself.
  • the cover is fastened to a supporting arm, which is welded to a cylindrical housing, which- in turn is arranged movably at the upper end of a hydraulic cylinder.
  • a cam groove with differently sloped upper and lower portions, is provided in the outer surface of the housing, and engages a roll at the furnace platform. Once the furnace is tipped, the hydraulic cylinder is actuated to shift the cover through the range of motion defined by the upper groove portion, and gravity moves the cover through the remaining range.
  • sheaves are rotated in order to lift the lid via chains so that the lid can be swung laterally away from the furnace. All of these designs, however, are for use with movable furnaces, and are not practical for use with a coke drum.
  • the present invention addresses the forgoing needs in the art by providing an apparatus by which the top head cover of a coke drum can be first lifted and then both lifted and swung away from the coke drum.
  • the present invention relates to an apparatus for removing a top head cover from a delayed coking drum, which includes a column and a hollow tube slidably nested over the column and secured to the cover.
  • the column has a generally cylindrical surface and is fixed positionally relative to the drum.
  • a groove is provided in the surface of the column.
  • the groove has a generally longitudinal lower segment and a sloped upper segment.
  • a pressurized cylinder is affixed to the tube, and a piston is slidably disposed in the cylinder and affixed to the column, so that axial movement of the piston relative to the cylinder imparts axial movement of the tube relative to the column.
  • a bearing is secured to the tube and rides in the groove of the column. The bearing is disposed in the lower segment of the groove when the cover is positioned to close the drum.
  • the tube moves (i) _ 5 _
  • the column can include a plurality of the grooves, and a plurality of the bearings can be affixed to the tube, each bearing riding in a respective one of the grooves.
  • the cylinder can be provided coaxial with and disposed at a longitudinal end of the tube.
  • the tube can be secured to the cover by a support member " that extends generally radially from the tube.
  • a locking pin can be secured to the tube and selectively insertable into a recess in the column so as to impede movement of the tube relative to the column, wherein the recess is positioned so as to receive the locking pin when the bearing is a distance above the lower segment of the groove.
  • An additional pressurized cylinder can be provided for actuating the locking pin, and the locking pin can be biased so as to extend from the additional pressurized cylinder, and the additional pressurized cylinder can be actuated to retract the locking pin.
  • the bearing can include a shaft affixed to the tube and a roller bearing rotatably secured to the shaft and positioned in the groove.
  • a preferred aspect of the invention includes a spool, the spool including a lower flange securable to the drum and an upper flange to which the cover is securable, wherein the column is secured to the lower flange.
  • a lower support can be provided, extending from the lower flange and to which the column is secured, and an upper support can be provided, extending from the cover and to which the tube is secured.
  • a socket can be affixed to the lower support, wherein the socket includes an opening into which the column is secured.
  • a locking peg can extend through lateral openings in the socket and a transverse opening in the column to secure the column in the opening of the socket.
  • a bearing support can be affixed to an outer surface of the tube, wherein the bearing is affixed to the bearing support, and the bearing support is affixed to the upper support.
  • this invention in another aspect, relates to an apparatus for removing a top head cover from a delayed coking drum, which includes a column having a generally cylindrical surface, the column being fixed positionally relative to the drum, and a hollow tube slidably nested over the column and secured to the cover. Means is provided for imparting axial movement of the tube relative to the column between a lower position, at which the cover is positioned on the drum, and an upper position, at which the cover is separated from the drum. Means is also provided for imparting rotational movement of the tube relative to the column concurrently with the axial movement of the tube to the upper position, from an intermediate position, which is between the lower and upper positions.
  • imparting rotational movement can also impart reciprocative rotational movement of the tube relative to the column concurrently with the axial movement of the tube from the upper position to the intermediate position.
  • the apparatus can include selectively engageable means for preventing the tube from sliding relative to the column.
  • the means for preventing the tube from sliding can automatically engage, and can be selectively disengaged, when the tube is in the- upper position relative to the column.
  • this invention relates to a top head assembly for a delayed coking drum, the drum having a top head flange and a top head cover that mates with the top head flange.
  • the assembly includes a spool, which includes a bottom flange and a top flange, the bottom flange being configured to mate with the top head flange of the drum, and the top flange being configured to receive the top head cover of the drum.
  • a column is secured to the spool and has a generally cylindrical surface and a groove in the surface, the groove having a generally longitudinal lower segment and a sloped upper segment .
  • a hollow tube is slidably nested over the column and secured to the cover.
  • a pressurized cylinder is affixed to the tube, and a piston is slidably disposed in the cylinder and affixed to the column, so that axial movement of the piston relative to the cylinder imparts axial movement of the tube relative to the column.
  • a bearing is secured to the tube and rides in the groove of the column, the bearing being disposed in the lower segment of the groove when the cover is positioned on the top flange.
  • the tube moves (i) axially relative to the column when the bearing rides up the lower segment of the groove, so as to lift the cover away from the top flange, and (ii) axially and rotationally relative to the column when the bearing rides up the upper segment of the groove, so as- to lift and swing the cover away from the top flange.
  • Figure 1 is a partial cutaway, front elevational view of an automatic unheading apparatus according to a preferred embodiment of the present invention.
  • Figure 2 is a top plan view of the apparatus of Figure 1.
  • Figure 3 is a side elevational view of the apparatus of Figure 1.
  • Figure 4A is a side elevational view of the lifting mechanism of the apparatus of Figure 1.
  • Figure 4B1 is a front elevational view of the lifting mechanism of Figure 4A.
  • Figure 4B2 is a bottom plan view of the lifting mechanism of Figure 4B1.
  • Figure 4B3 is a top plan view of the lifting mechanism of Figure 4B1.
  • Figure 4C is a schematic cross-sectional view of the lifting mechanism of Figure 4B1.
  • Figure 4D is a top plan view of the lifting mechanism of Figure 4B1 in its fully raised position.
  • Figure 5 is a schematic top plan view illustrating the range of motion of the lifting mechanism of the apparatus of Figure 1.
  • Figure 6 is a partial cutaway, front elevational view of an automatic unheading apparatus according to an alternate embodiment of the present invention.
  • Figure 7A is a detailed view of the area indicated by circle A in Figure 6.
  • Figure 7B is a detailed view of the area indicated by circle B in Figure 6.
  • Figure 7C is a partial cross section taken along the line C-C in Figure 6.
  • Figure 8 is a schematic top plan view illustrating the range of motion of the lifting mechanism of the apparatus of Figure 6.
  • FIGS 1-5 illustrate an unheading apparatus 1 according to a preferred embodiment of the present invention, which is usable for automatically removing a top head cover 2 from a delayed coking drum (not illustrated) .
  • the illustrated unheading apparatus 1 includes a column 10 which is held stationary relative to the drum.
  • a tube 20 is secured to the top head cover 2 and is slidably disposed over the column 10.
  • the cover 2 can be lifted and swung away from the drum.
  • the initial movement of the tube 20 is substantially axial until the cover 2 is sufficiently separated from the drum.
  • the cover 2 can then be both lifted and swung away from the top head of the drum to permit a coke cutting drill, for example, to be lowered into the drum.
  • the rotational movement of the tube 20 relative to the column 10 is accomplished by a camming mechanism that is actuated as the tube 20 slides axially on the column 10.
  • the camming is preferably effected by a bearing 30, which is affixed to either the tube 20 or the column 10 and rides in a groove or "raceway" 40, which is disposed in the other of the tube 20 and the column 10.
  • the preferred column 10 is generally vertical and has a generally cylindrical surface.
  • the column 10 is fixed positionally relative to the drum.
  • At least one raceway 40 is provided in the surface of the column 10.
  • an opposing pair of raceways 40 is provided.
  • Each raceway 40 has a generally longitudinal lower segment 42 and a sloped upper segment 4 . It should be noted that the raceway 40 can extend upwards, beyond the upper segment 44, if desired, without departing from the scope of the invention.
  • the preferred tube 20 is hollow, generally cylindrical, and slidably nested over the column 10.
  • a pair of bushings 15 is secured to the inner surface of the tube 20, preferably secured in depressions into the inner surface of the tube 20.
  • the bushings can be formed of brass, bronze, or other suitable material.
  • the tube 20 is secured to the cover 2.
  • the bearing 30 is affixed to the tube 20 and rides in the raceway 40 of the column 10.
  • the bearing 30 is disposed in the lower segment 42 of the raceway 40 when the cover 2 is positioned on the coking drum.
  • the column 10 and the tube 20 are each preferably formed of a high strength material such as a low alloy carbon steel, stainless steel or other high alloy. The particular material selected will depend in large part on the expected temperatures of operation, as is well known in the art. Carbon steel and low alloy are most preferred as materials for the column 10 and tube 20, respectively.
  • a pressurized lifter cylinder 50 is affixed to the tube 20.
  • a piston (not illustrated) is slidably disposed in the cylinder 50 and affixed to the column 10 by a piston rod 52.
  • the piston rod 52 is secured to the top of the column 10.
  • the lifter cylinder 50 itself is secured to the top of the tube 20.
  • a cylinder mounting plate 54 is secured to the end of the tube by socket head cap screws 55, welding, or the like.
  • the lifter cylinder 50 is affixed to the- mounting plate 54 by bolts 56, welding or the like.
  • the piston rod 52 extends through an opening in the mounting plate 54.
  • the lifter cylinder 50 is a standard industrial hydraulic cylinder.
  • the piston rod 52 can be secured to the column by a standard rod end kit, which includes a safety coupler, a weld plate and bolts.
  • lifter cylinder 50 is not necessarily coaxial with column 10, this is the preferred arrangement in order to conserve space, minimize parts, and reduce stresses .
  • the interaction of the bearing 30 and raceway 40 dictates the rotational orientation of the tube 20 relative to the column 10 as the tube 20 is raised and lowered on the column 10.
  • axial movement of the piston relative to the cylinder 50 translates into substantially axial movement of the tube 20 relative to the column 10.
  • the bearing 30 rides in the sloped upper segment 44 of the groove 40
  • axial movement of the piston causes the tube 20 to move axially and rotationally relative to the column 10.
  • the bearing 30 rides in the longitudinal lower segment 42 of the raceway 40 when the cover 2 is in or near its lowermost, or closed, position.
  • the cover 2 can be lifted from and lowered into its closed position in a substantially linear manner. This facilitates removal of the cover 2 and permits the cover 2 to be seated properly.
  • the distance through which the cover 2 is carried in this linear, axial manner (i.e., the length of the lower segment 42 of the raceway 40) should be selected to be sufficient to separate the cover 2 and connecting bolts from the flange to which it is secured, thus permitting the cover 2 to be swung laterally without impediment.
  • this distance should be as short as practical, while meeting the previous criterion. This will reduce the overall stroke of the lifter cylinder 50.
  • the slope of the upper segment 44 of the raceway 40 can be more gradual while still allowing for sufficient rotation of the tube 20 on the column 10 to swing the cover 2 away from the drum top head opening .
  • the bearing 30 rides in the sloped upper segment 44 of the raceway 40 when the cover 2 is beyond a certain distance above its lowermost, or closed ' , position. As the bearing 30 rides in this segment of the raceway 40, the movement of the cover 2 has both axial and lateral components relative to the drum.
  • This segment of the raceway 40 is configured so that as the bearing 30 moves toward the top of the segment, the cover 2 will swing laterally away from the top head opening of the drum.
  • the upper segment 44 should be long enough and sloped sufficiently that the cover 2 is moved laterally far enough to permit a cutting tool, for example, to be inserted into the drum.
  • the lifter cylinder 50 drives the tube 20 upwards, relative to the column 10, the bearing 30 is at first in the lower section of the raceway 40, and the cover 2 is initially lifted straight up. Once the bearing 30 enters the upper section of the raceway 40, the cover 2 is both lifted and swung away from the top head opening of the drum.
  • the lower section is long enough to raise the cover 2 and securing bolts enough to permit lateral movement of the cover 2.
  • the upper section is long enough and sloped sufficiently to swing the cover 2 completely away from the opening of the drum.
  • the lifter cylinder has an overall stroke of approximately sixteen inches (40.6 cm), with the linear portion of the stroke being approximately five inches (12.7 cm) .
  • the upper segment 44 of the raceway 40 slopes so as to rotate the tube 20 approximately 120° relative to the column 10.
  • the column 10 can be secured relative to the drum in any of a number of different manners that will be apparent to those of skill in the art.
  • the column 10 can be supported on a separate structure that is provided adjacent to the drum, or can be supported by a platform that is in turn secured directly to the drum.
  • the preferred apparatus 1 is provided as an assembly that can be attached as a unit to the drum.
  • a separate spool 60 is provided as a platform for the apparatus 1, and the column 10 is secured to the spool 60.
  • the spool 60 includes a lower flange 62, a vertical pipe segment 64, and an upper flange 66.
  • the vertical pipe segment 64 is provided to create some longitudinal spacing between the upper and lower flanges 66, 62.
  • the lower flange 62 mates with the top head flange of the drum (not illustrated) .
  • the top head cover 2 rather than engaging with the top head flange of the drum, instead engages with the upper flange 66 of the spool 60 to close the drum.
  • the lower and upper flanges 62, 66 are preferably substantially identical to one another and to the top head flange of the drum.
  • the lower and upper flanges 62, 66 are each preferably formed of a high strength material such as a low alloy carbon steel, stainless steel or other high alloy. The particular material selected will depend in large part on the expected temperatures of operation, as is well known in the art. Nevertheless, we have found that low alloy steel is most preferred.
  • Each of the flanges has a set of longitudinally extended bolt holes 67 disposed around its circumference, by which the flanges can be secured by bolts 68 to the top head flange or top head cover 2, respectively.
  • the column 10 is secured to the lower flange 62 of the spool 60.
  • a lifter support 70 extends from the lower flange 62, to provide a platform to which the column 10 is secured.
  • the lifter support 70 is welded to the outer circumference of the lifter support 70.
  • the column 10 can be affixed to the lifter support 70 in any of a number of manners that will be apparent to those skilled in the art, such as by welding or bolting.
  • the lifter support 70 has an opening 72 through which the column 10 extends.
  • a socket 80 into which the column 10 fits, can be secured to the lifter support 70 to provide additional support to stabilize the column 10.
  • the socket 80 in this embodiment which can be formed of carbon steel or like suitable material, fits through the opening 72 of the lifter support 70.
  • the column 10 in turn extends through an opening 84 in the socket 80.
  • a bolt' flange 82 extends from the circumference of the socket 80, and the bolt flange 82 can be bolted to the lifter support 70.
  • the socket 80 has opposing, radially extending holes 86.
  • the column 10 has a matching diametrical hole 12.
  • the column hole 12 can be aligned with the holes 86 of the socket 80, and a locking peg 14, for example, can be inserted through the aligned holes to lock the column 10 in place.
  • the holes 86, 12 need not be radial and diametrical, respectively, as long as the peg 14, for example, can extend therethrough to lock the column 10 in place.
  • the tube 20 can be secured to the top head cover 2 in any of a number of manners that will apparent to those of skill in the art, such as by welding, or bolted flanged connection.
  • the tube 20 and the top head cover 2 are secured to one another through a cover support 90.
  • the cover support 90 attaches to the outer circumference of the top head cover 2, preferably by welding.
  • the cover support 90 preferably has an opening 92 through which the tube 20 extends. If desired, the cover support 90 can be welded to the tube 20.
  • the above-noted bearing 30 preferably comprises a pair of bearing assemblies which are secured to- the tube 20.
  • the bearing assemblies 32 each includes a bearing housing 34, a bearing shaft (not illustrated), and a roller bearing 36, preferably a needle roller bearing.
  • the roller bearing is a standard industrial bearing.
  • the bearing shaft can be formed of any suitable alloy steel, such as hardened tool steel.
  • the housing 34 is secured to the tube 20, and the roller bearing 36 extends inward from the inner surface of the tube 20.
  • the roller bearings 36 each rides in one of the pair of matching raceways 40 provided in the surface of the column 10.
  • a bearing support member 95 is provided, by which the tube 20 is secured to the cover support 90 and the bearing housings 34 are secured to the tube 20.
  • the bearing support member 95 has an opening through which the tube 20 extends.
  • the bearing support member 95 which is preferably formed of carbon steel or the like, is welded or otherwise secured to the circumference of the tube 20.
  • the bearing support member is bolted or otherwise secured to the cover support 90.
  • the bearing housings 34 can be bolted or otherwise secured to the bearing support member 95.
  • the apparatus 1 includes a mechanism to lock the cover 2 into place in its uppermost position.
  • this is accomplished by a pressurized locking cylinder 100.
  • This locking cylinder 100 houses a locking pin 102, which is driven by a piston within the locking cylinder 100.
  • a recess 11 is provided in the column 10 at a location to receive the locking pin 102 when the cover 2 is in its fully raised (and swung) position.
  • the locking cylinder 100 is secured to the outside of the tube 20, with the locking pin 102 facing toward the center of the tube 20.
  • the locking pin 102 is spring biased so as to extend out from the locking cylinder 100 through an opening 22 in the tube 20 toward the column 10.
  • This bias can be provided by spring washers or the like (not illustrated) disposed within the locking cylinder 100.
  • the locking cylinder 100 can be actuated to retract the locking pin 102 against the spring bias.
  • the locking cylinder 100 extends from the support member at an elevation approximately the same as the bearings 30.
  • a plate 104 is mounted on struts 106 at a fixed distance from the tube 20, and the locking cylinder 100 is mounted to the plate 104.
  • a suitable locking pin 102 is preferably formed of hardened carbon steel.
  • the locking cylinder 100 is a standard spring- loaded hydraulic cylinder. Alternate mechanisms, such a pneumatic cylinders or other mechanical drives, can be used to set and retract the locking pin 102 without departing from the scope of the invention.
  • the cover 2 is in its closed position' on the upper flange 66 of the apparatus 1, the locking cylinder 100 is depressurized. Thus, the locking pin 102 is biased out of the locking cylinder 100 and presses against the outer surface of the column 10. As the lifter cylinder 50 raises the tube 20 on the column
  • the locking pin 102 rides on the surface of the column 10.
  • the spring-loaded locking pin 102 snaps into the recess
  • the lifter cylinder 50 can be deactuated once the cover 2 is fully raised.
  • the locking pin 102 will prevent the cover 2 from sliding back toward the upper flange 66 of the apparatus 1.
  • the locking cylinder 100 can be pressurized to retract the locking pin 102.
  • the tube 20 will simply slide back down the column 10, guided by the roller bearings 36 in the raceways 40, until the cover 2 rests on the upper flange 66.
  • the deactuated lifter cylinder 50 acts as a damper to control the descent of the tube 20 and cover 2.
  • the cover 2 can be lifted by conventional means, such as a winch. If necessary, the lifter cylinder 50 can be opened to permit the piston to float freely.
  • the winch will be cinched to the apparatus 1 or cover 2 in a manner that permits the cover 20 to swing due to the movement of the bearing 30 up the raceway 40. Even in the event of hydraulic failure, the locking pin 102 will snap into the recess 11 as the bearing 30 approaches the top of the raceway 40.
  • the unheading apparatus 1 of the present invention be used in conjunction with a bolting mechanism that automatically bolts and unbolts the cover 2 from the drum. This permits the cover 2 to be automatically unbolted and removed from the drum at the beginning of each decoking operation.
  • a preferred bolting mechanism is disclosed in copending U.S. Patent Application No. 09/170,191, entitled Stud Tensioning Device for Flange Cover, incorporated by reference herein, in its entirety. Portions of that mechanism are illustrated herein in Figures 1 and 2.
  • a bolt cylinder 200 automatically tensions bolts against a rotating keyhole plate 201 to clamp the cover 2 to the upper flange 66.
  • a push-pull mechanism 202 selectively rotates the keyhole plate 201 between its locking position, in which the bolt heads clamp against the keyhole plate 201, and its unlocked position, in which the bolt heads can pass through the keyhole plate to permit removal of the cover 2.
  • Figures 6-8 illustrate an alternate embodiment of the unheading apparatus 1 of the present invention.
  • This embodiment includes many features, any of which can be incorporated into the above-described preferred embodiment without departing from the scope of the invention. Those features which are similar to the previously-discussed embodiment are given similar reference numerals, and no separate detailed description is given.
  • the tube 20 is secured to the cover 2 by a lifting arm 190 that engages the top, rather than the circumference, of the cover 2.
  • the lifting arm 190 is preferably bolted to the cover 2.
  • the lifting arm 190 is formed of a pair of vertically oriented plates 192, at the end of which is welded a footplate 194.
  • a cross plate 196 which has a hole through which the tube 20 extends, provides lateral support.
  • the vertical plates 192 are welded to a sleeve 195, which fits over the tube 20.
  • a plurality of reinforcement plates 198 are also welded to the footplate and between the vertical plates.
  • the footplate is secured to the cover 2 by bolts 199.
  • only a single bearing 30 is employed. Therefore, only a single raceway 140 is provided in the column 10.
  • the bearings 30 are not secured to the sleeve 195. Rather, the sleeve 195 is notched at its bottom edge, and the bearing 30 fits within the notch. This permits the sleeve 195 (and cover 2) to be lifted off the tube 20 (and over the hydraulic cylinder) without removing the bearing 30.
  • the locking cylinder is located directly below the sleeve 195. Because the locking pin 102 is located at a lower elevation than the bearing 30, the recess 111 into which the locking pin 102 snaps is appropriately located at a lower elevation than the top of the raceway 140.
  • the locking cylinder 100 is supported on a plate, which in turn is supported by a pair of struts that extend out from the tube 20.
  • the socket 180 into which the column 10 is secured at its lower end, is reinforced in this embodiment by a plurality of buttresses 88 that extend radially.
  • the lifter support 170 is reinforced by a brace 125, which comprises a pair of vertically oriented plates 126.
  • a brace 125 which comprises a pair of vertically oriented plates 126.
  • One end of the brace is secured to the pipe segment 64 of the spool 60, preferably by welding or bolts.
  • the other end of the brace is secured to the bracket, also preferably by welding or bolts.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Coke Industry (AREA)

Abstract

Cette invention concerne un dispositif permettant de retirer le couvercle supérieur d'un four de cokéfaction retardée, qui comprend une colonne et un tube creux emboîté coulissant sur la colonne et solidaire du couvercle. La colonne, qui présente une surface généralement cylindrique, a une position fixe par rapport au four. La surface de la colonne comporte une gorge. Cette gorge présente une partie inférieure généralement longitudinale et une partie supérieure oblique. Un cylindre sous pression est fixé au tube, et un piston est monté coulissant dans le cylindre et fixé à la colonne, de sorte que le mouvement axial de ce piston par rapport au cylindre entraîne un mouvement axial du tube par rapport à la colonne. Le palier se trouve dans la partie inférieure de la gorge lorsque le couvercle se trouve à proximité du four. Le tube se déplace (i) axialement par rapport à la colonne lorsque le palier évolue dans la partie inférieure de la gorge de manière à soulever le couvercle à l'écart de la collerette supérieure, et (ii) axialement et en rotation par rapport à la colonne lorsque ce palier se déplace dans la partie supérieure de la gorge de manière à soulever le couvercle et à le faire pivoter à l'écart de la collerette supérieure.
PCT/US2000/015116 1999-06-11 2000-06-02 Dispositif superieur pour four a coke automatise Ceased WO2000077119A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US33009099A 1999-06-11 1999-06-11
US09/330,090 1999-06-11

Publications (1)

Publication Number Publication Date
WO2000077119A1 true WO2000077119A1 (fr) 2000-12-21

Family

ID=23288281

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/015116 Ceased WO2000077119A1 (fr) 1999-06-11 2000-06-02 Dispositif superieur pour four a coke automatise

Country Status (1)

Country Link
WO (1) WO2000077119A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102288037A (zh) * 2011-07-22 2011-12-21 江苏金泰隆机电设备制造厂 电液控制的炉门自动开关装置
CN103710761A (zh) * 2014-01-09 2014-04-09 北京七星华创电子股份有限公司 一种可实现炉门升降和旋转一体运动的机构
CN105419851A (zh) * 2014-09-16 2016-03-23 中国石油天然气股份有限公司 一种清焦装置及其清焦方法
CN113072964A (zh) * 2021-04-06 2021-07-06 无锡上工锅固废利用科技有限公司 生物质卧式旋芯炭化炉

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2396663A (en) * 1944-05-17 1946-03-19 Whiting Corp Electric arc furnace
US3751854A (en) * 1971-02-05 1973-08-14 Bbc Brown Boveri & Cie Cover lifting-and swinging mechanism for a tiltable furnace
US3930641A (en) * 1974-09-12 1976-01-06 Hawley Manufacturing Corporation Furnace hood structure
WO1999020923A1 (fr) * 1997-10-22 1999-04-29 Foster Wheeler Usa Corporation Dispositif servant a serrer un goujon de fixation d'un couvercle a une bride

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2396663A (en) * 1944-05-17 1946-03-19 Whiting Corp Electric arc furnace
US3751854A (en) * 1971-02-05 1973-08-14 Bbc Brown Boveri & Cie Cover lifting-and swinging mechanism for a tiltable furnace
US3930641A (en) * 1974-09-12 1976-01-06 Hawley Manufacturing Corporation Furnace hood structure
WO1999020923A1 (fr) * 1997-10-22 1999-04-29 Foster Wheeler Usa Corporation Dispositif servant a serrer un goujon de fixation d'un couvercle a une bride

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102288037A (zh) * 2011-07-22 2011-12-21 江苏金泰隆机电设备制造厂 电液控制的炉门自动开关装置
CN103710761A (zh) * 2014-01-09 2014-04-09 北京七星华创电子股份有限公司 一种可实现炉门升降和旋转一体运动的机构
CN103710761B (zh) * 2014-01-09 2016-03-16 北京七星华创电子股份有限公司 一种可实现炉门升降和旋转一体运动的机构
CN105419851A (zh) * 2014-09-16 2016-03-23 中国石油天然气股份有限公司 一种清焦装置及其清焦方法
CN105419851B (zh) * 2014-09-16 2017-02-08 中国石油天然气股份有限公司 一种清焦装置及其清焦方法
CN113072964A (zh) * 2021-04-06 2021-07-06 无锡上工锅固废利用科技有限公司 生物质卧式旋芯炭化炉

Similar Documents

Publication Publication Date Title
EP0540000B1 (fr) Dispositif et procédé pour la fermeture d'un four à coke
US4248488A (en) Quick disconnect bearing mount for construction machinery
US4820384A (en) Remotely operable vessel cover positioner
CN102387980A (zh) 提升设备，特别是移动提升设备
CN113511588B (zh) 启闭机油缸的翻转行走装置及方法
CA2510137C (fr) Appareil de manutention de tuyaux de champ petrolifere
CA3101208A1 (fr) Mat telescopique autobloquant
WO2000077119A1 (fr) Dispositif superieur pour four a coke automatise
US6022454A (en) Remotely operable pressure vessel system
EP0774760B1 (fr) Système pour changer des dispositifs d'entraínement de barre de contrôle d'un réacteur nucléaire
US10822212B1 (en) Counterweight attachment mechanism for a crane
CN118954319B (zh) 一种炭素预焙烧阳极车间生产用的夹钳吊装装置
US5540523A (en) Pile handling tool
CN108862033B (zh) 一种起吊装置
RU2157787C2 (ru) Опорно-поворотное устройство гидроманипулятора
CN208562595U (zh) 半导体单晶炉上炉筒自动脱开机构
CN217439506U (zh) 抱箍式可拆装移动平台滚轮结构
EP1756321B1 (fr) Dispositif de service pour haut-fourneau et dispositif de manipulation permettant de remplacer un canal de coulee
US6989082B2 (en) Hinged bottom cover for unheading a coke drum
EP4051901B1 (fr) Appareil d'éolienne
CN220759185U (zh) 一种气动开关门装置
CN220353716U (zh) 液压升降安全门
CN120174165A (zh) 一种用于安装高炉冷却壁的工装及其使用方法
CN209780790U (zh) 修井作业平台及修井作业设备
SU1366831A1 (ru) Дугова плавильна печь

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE BR CA CN ID KR MX NO SG

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase