US2290568A

US2290568A - Coke oven leveler bar sealing device

Info

Publication number: US2290568A
Application number: US325424A
Authority: US
Inventors: Mcintosh James
Original assignee: Individual
Current assignee: Individual
Priority date: 1940-03-22
Filing date: 1940-03-22
Publication date: 1942-07-21
Anticipated expiration: 1959-07-21

Description

July 21', 1942. J'. MclNTosH GOKE OVEN LEVELER BAR SEALING DEVICE Filed Marsh 22, 1940 2 sheets-sheet 1 NN NN NQ -J. MGINTOSH July 21, 1942.

coxEoVEN LEVELERYBAR SEAL'ING DEVICE "Filed March 22., 19140Y 2 Sheets-Sheet 2 Patented July 2l, 1942 UNITED s'mrEs PATENT OFFICE COKE ovEN LEVELER BAB sEALlNG DEVICE l James McIntosh, Pittsburgh, P.I Application March 2z, 1940, semi No. 325,424

6 Claims.

This invention relates to coke ovens, and particularly to improved means for sealing the openY ing through which the conventional leveler bar of a pusher machine operates.

It is well known to those skilled in the art ovens by the pusher, according to a predetermined schedule.

' Conventional pusher machines are also equipped with mechanism for removing the oven door and replacing it after each charge of 'cokehas been pushed. It is also conventional to provide pusher machines with a leveler bar comprising an elongated member which is 'reciprocated through a smalldoor opening near the top of the oven so as to cause the peaks of coal in the oven to be leveled olf to a substantially uniform depth.

Heretofore, the operation of leveling was ac companied by a great loss o f gas and other products of combustion which at the leveling stage of operation of the oven are particularly dense. Frequently these gaseous products become ignited, resulting in a burst of flame which is no-L only confusing to the pusher operator, especially at night, but otherwise detrimental to efcient operation. Moreover, heretofore air objectionably entered the coking chamber through the unsealed leveler door opening, thus increasing the amount of suction required to remove the gas from the oven chamber and having other detrimental effects.

It is an object of thelpresent invention to provide sealing means which, during the operation of the leveler bar, will be effective in coaction therewith to substantially prevent the escape of gaseous products from the coking chamber or the entry of air into the chamber. y

It is a further object of the invention to so coordinate'with the leveler bar of a coke oven pusher Vmachine the various instrumentalities herein shown, described and claimed, that they singly and jointly perform the functions set forth.

For a complete understanding of the invention, reference should 'be made to the accompanying drawings, the following detailed description, and the appended claims.

In the drawings, Figure 1 is a transverse secltion through a portion of the pusher side of a coke oven showing as much of a conventional type of pusher machine as is necessary for a complete understanding of the present invention.

Figure 2 is an enlarged view of the parts shown in Figure l, showing in greater detail the sealing device of the present invention and related operating mechanism.

Figure 3 is a detailed section o'n line III-III of Figure 2.

Figure 4 is a horizontal section on line IVIV of Figure 2.

Figure 5 is a transverse section on line V-V of'Figure 2.

Referring more particularly to the drawings, I0 represents a conventional type of coke oven, with coking chamber I2 adapted to be closed -by an end door I4 held in the usual manner and adapted to be engaged and disengaged by a suitable door-operating mechanism lcarried by the pusher machine I6. The pusher machine, which travels in front of the battery of ovens on suitable track rails I8, will carry the usual ram or pusher, not shown, for discharging coke from the chamber I2. Inasmuch as the door-operating means and the pusher mechanism per se form no part of the present invention, they will not be further shown or described.

In the normal operation of coke ovens, the coal Vto be coked is discharged from an overhead traveling hopper car through suitable .openings in the roof. The conventional discharging prac- Atice results in the formation of peaks of coal 32. One portion of the cable 30 extends forwardly and around a guide shcave 34, and is attached at 38 to the leveler bar. Another portion 38 of the cable extends rearwardly of the drum and around a rear guide sheave 40, and is attached at 42 to the leveler bar. As thus arranged, it will be apparent that when the leveler bar motor 44 is energized, motion will be transmitted through reduction gearing 4B to the drum 32 to thus impart a stroke to the leveler bar of desired length to properly level o the peaks of coal in the oven.

with a leveler bar opening 50 which is formed in a frame 52. The opening 50 is normally closed.,

by a leveler opening door (not shown). Heretofore, during the leveling operation, at which time the door referred to must of necessity be opera, gas could escape from the oven, and during certain stages, air could also be drawn into the oven. To prevent such undesirableoccurrences, I provide a sealing device which in the ,embodiment illustrated comprises a sleeve which is independently mounted for sliding movement relative to the leveler bar and arranged to embrace the same and close the door opening. This sleeve, in combination with certain transverse partitions incorporated in the improved leveler bar structure, effectively prevents escape of gas from the oven during the operation of leveling the coal by reciprocating movement of the leveler bar. To this end I preferably construct the leveler bar of a pair of parallel bar members 54-54 with transverse partition-like spacers between them. At its forward end the leveler bar is equipped with a poker head 58 which in the embodiment illustrated is of pointed form.

The length of the sealing sleeve 48 is greater than the longitudinally measured distance between any two adjacent spacers 56. Thus at all times at least one spacer will serve as a partition to prevent the escape of gas through the sleeve. From the drawings it is clear that at points other than those embraced by the sleeve, the space between the bars 54-54 is open at top and bottom.

The sealing sleeve is slidably supported with freedom of independent movement relative to the leveler bar by means of longitudinally-extending rods 60-60 whose forward ends are bolted to brackets 62 secured to the opposite side walls of the sleeve 48. The rods 60 ride between upper and lower

grooved rollers

64 and 66 which are carried by suitable journal pins secured to channel members 68 constituting part of the framework of the pusher machine.

Each rod 60 is connected by means of a link to a lever 12 carried by rock shaft 14 which also has secured thereto an arm 16 from the free end of which is suspended a weight 18. This weight, through the connections described, serves to yieldably urge the sealing sleeve 48 toward the face of the leveler bar door-opening frame 52, and is effective to hold the forward flanges 80 of the sealing Isleeve firmly in engagement with the marginal portion of the frame surrounding the leveler bar door opening.

A crosshead 82 is slidably mounted on supporting rods 84 secured to any suitable portion ofthe pusher machine frame, and is connected by means of a cable 86 with apin 88 carried by the arm 12. This crosshead carries a detent 90 for coaction with a lug 92 projecting laterally from the leveler bar. As thus arranged, it will be apparent that when the motor 44 is energized it will cause the leveler bar to advance through the door opening, and the weight 18, acting through

arms

16 and 12, will cause the sealing sleeve 48 to move forward with the leveler bar from the full line position of Figure 1 to the dotted lineposition in which the forward flange 80 of the sealing sleeve contacts the front face of the leveler bar .door-opening frame. The Weight 18 thereafter yieldingly holds the sealing sleeve in contact with the door frame, while the leveler bar continues its forward movement. TheV bar may be operated to give various intermittent forward and rearward strokes. During such operation, one or more of the spacers 56 carried by the leveler bar will function as transverse partitions or barriers to prevent escape of gas through the sleeve or the entry of air into the oven through the sleeve.

After the leveling operation is completed, the leveler bar will be retracted, to the position shown in Figure 1, for example, and during such movement the lug 92 will engage the detent 90 and thus rock the arm 12 to retract the sealing sleeve 46, whereupon the usual leveler bar door will be closed.

Manually operable braking means of the type 4shown in Figure 2 are lpreferably provided to releasably hold the sealing sleeve in a closed position. These means include brake drum 94 with which cooperates a band brake 96, one end of which is connected at 98 to a. lever |00 which is pivoted at |02 t'o a suitable xed bracket. Also carried by the pivot is a crank arm |04 which in turn is pivotally connected to one end of the brake band. A spring |06 is secured at one end to the lever |00 and at its opposite end to a fixed anchorage |08. Thus the spring normally tends to rock the brake lever |00 to release position. For applying the brake there is a pedal ||0 which rocks a bell crank ||2 carried by rock shaft ||4 in a direction to apply tension to the brake cable ||6 passing around a guide sheave ||8 and attached at |20 to the brake lever |00. As thus arranged, the operator can manually restrain the forward movement of the seal sleeve whenever deemed advisable, and also, by locking the brake, the sleeve can be held in firm engagement against the leveler door fram'e during the leveling operation.

As illustrated in detail in Figure 3, the leveler bar sealing sleeve 48 comprises two main elements, one consisting of a generally U-shaped portion, as viewed in cross section, including the opposite sidewalls |22 and |24, joined by top wall |26. Following the general U-shaped contour of these parts is the forward marginal flange which overlaps and is arranged to be firmly seated against, the edge of the shell-like flange |28 which surrounds the lever bar opening in the door frame of the oven, indicated generally at 52.

The top member |26 of the leveler seal sleeve slides freely `on the top edges of the members 54--54 of the leveler bar. The bottom of the sealing sleeve in the embodiment of the invention illustrated includes a plate |30 which is pressed upwardly against th`e under side of the leveler bar by springs |32 which surround guide studs |34 carried in cross rods |36. The bottom plate |30 has secured thereto a cross rod |38 which extends through Iguide slot-s |40 so as to restrain the bottom plate against endwise movenient and yet permit the same to be yildingly pressed bythe springs |32 against the under side of the leveler bar.

The intake of air during charging has a material effect on the suction induced by a steam jet in the standpipeduring charging. Any reduction in this air intake should result in the use of less steam and. consequently less condensates in the gas to be later processed and disposed of.

Less air into the gas will result in decreased gas dilution and should'also result in a reduction in the nitrous oxide compounds in the gas.

Less air into the gas during charging will result in more uniform pressure regulation with lower peaks and a lower average suction.

The use of this sealing device will eliminate the glare from the leveler operators eyes during charging.

While I have described quite precisely the speciic embodiment of the invention herein illustrated, it is to be understood that the drawings and description are to be interpreted by Way of example rather than limitation, since various modiiications and substitutions of equivalents may be made by those skilled in the art without departure from the invention as deiined in the appended claims.

I claim:

1. The combination with a coke oven having a leveler opening in one end thereof, of a pusher machine having a leveler bar, mechanism for reciprocating the same into and out of the oven through said leveler opening, a sealing member embracing the leveler bar and having a flanged portion for sealing engagement with the marginal face of the oven adjacent said opening, means for supporting said'member with freedom for independent slida-ble movement with relation to the leveler bar, yieldable means tending to press said member into sealing engagement against the face of the oven, .and means movable in unison with the leveler bar for overcoming the Vreffect of said yieldable means upon a predetermined outwar movement of said leveler bar. i

1 bar, a pivoted lever having a connection with said 2. The combination with a coke oven having a leveler opening on one end thereof, of a pusher machine having a leveler bar, mechanism for reciprocating the same into and out of the oven through said leveler opening, a sealing member embracing the-leveler bar, means for supporting.

said member with freedom for independent slidable movement in relation to said leveler bar, yieldable means tending to press .said member into sealing engagement with the face of the oven adjacent said pusher opening, and means on the leveler bar for imparting withdrawing movement to said member upon rearward movement of the leveler bar. .Y

3. The combination with a coke oven having a leveler opening in one end thereof, of a pusher machine having a leveler bar, mechanism for reciprocating the same into and out of the oven through said leveler. opening, a sealing member embracing the levelerbar and having a anged portion for sealing engagement with the face of the-oven adjacent said opening, means for supporting said memberwith freedom for independent `slidable movement with relation to the leveler sleeve, means tending to move said lever in a direction to urge the sleeve toward the oven, a manually controlled brake for preventing movement of said lever, and means actuated upon an outward movement of the leveler bar for rocking said lever inl a direction opposite to that beforementioned. Y

4. The combination with a coke oven having a leveler opening in one endthereof, of a pusher machine having a leveler bar, mechanism for reciprocating the same into and out of the oven through said leveler opening, a sealing member,

urging said rods toward the coke oven, a. slidably mounted member having a connection with said lever lancl means on the leveler bar adapted to engage the last-named member so as to limit the forward movement of the sleeve relative to the leveler bar and to retract the sleeve after the leveler bar has moved outwardly a predetermined distance.

5. In horizontal coke ovens in which the charge in an oven is leveled by a leveler-bar operating through a leveler-door. means for closing substantially any gap between the leveler-bar and the leveler-door opening during the operation of leveling a charge, said means comprising a sealing plate fitting closely` around at least the top and sides of the leveler-bar, which sealing plate is large enough to cover .the leveler-door opening,

guide members attached to the sealing plate to permit the sealing plate torlde on the leveler-bar, and means to hold the sealing plate against the leveler-door opening during the operation of leveling a charge.

6. In horizontal coke ovens in which the charge is leveled by a leveler-bar operating through a leveler-door, means for closing substantially any gap between the leveler-barl and the leveler-door opening during the operation of leveling a charge, said means comprising a sealing plate of area greater than the leveler-door opening and tting closely around at least the top'and sides ot the leveler-bar which sealing plate is held against and extends over ythe leveler-door opening during the leveling operation.

JAMES MCINTOSH.