US2268316A

US2268316A - Leveling bar seal for coke ovens

Info

Publication number: US2268316A
Application number: US304636A
Authority: US
Inventors: Taylor Alan
Original assignee: Woodall Duckham 1920 Ltd
Current assignee: Woodall Duckham 1920 Ltd
Priority date: 1938-11-28
Filing date: 1939-11-15
Publication date: 1941-12-30
Anticipated expiration: 1958-12-30

Description

Dec. 30, 1941. A. TAYLOR 2,268,316

LEVELING BAR SEAL FOR COKE OVENS Filed Nov. 15, 1939 5 Sheets-Sheet 1 y mm? mm A ltprrigy Inventor Dec. 30, 1941. A. TAYLOR LEVELING BAR SEAL FOR COKE OVENS s Sheets- Sheet 2 Filed Nov. l5, 1939 Fig. 3.

Fig. 2 Inventor by I Q5 '9)? Alforngy Dec. 30, 1941. A. TAYLOR LEVELING BAR SEAL FOR COKE OVENS Filed Nov. 15, 1939 s Sheets-Sheet s Fig. 4.

sllllL Invmmr Patented Dec. 30, 1941 UNITED STATES PATENT OFFICE LEVELING BAR SEAL ron COKE OVENS Alan Taylor, Guildford, England, assignor to Woodall-Duc'kham 1920) Limited, Guildford,

Surrey, England Application November 15, 1939, Serial No. 304,636 In Great Britain November 28, 1938 4 Claims. (Cl. 214-23) the leveler-door and the bar, and it is found that' air has a tendency to enter the oven through this gap, more especially when the gas-ofitake from the oven is situated at the same end of the oven as the leveler-door (i. e. on the pusher side of the oven battery).

Even if the gas-ofitake is on the coke side of the oven, there is a tendency for air to enter if, for example, the oven is connected during charging with the next adjacent oven by means of an arch-pipe on the pusher side of the battery, with the object of reducing smoke emission.

It is undesirable that air should enter the oven during charging through the gap between the leveler-bar and the leveler-door, and the object of the present invention is therefore to seal substantially the inlet for the leveler-bar into the coke-oven during the leveling operation.

According to the present invention, while leveling a charge in a coke-oven by a leveler-bar in-' sorted through a leveler-bar door, the gap between the leveler-bar and the leveler-bar door is substantially closed by a sealing-plate fitting closely round at least the sides and the top of the leveler-bar and positioned against the aperture in the leveler-bar door.

According to the present invention also, means for closing substantially the gap between the leveler-bar of a coke-oven battery and a levelerbar door comprises a sealing-plate having an aperture therein for the passage of the levelerbar, which sealing-plate is mounted on the coalspillage chute whereby, when the spillage-chute is in the operative position, the sealing-plate is held against the open leveler-bar door, and after leveling, the sealing-plate is retracted with the spillage-chute to the out-of-service position.

In another embodiment of the invention, the gap between the leveler-bar of a coke-oven battery and a leveler-bar door is closed substantially by a sealing-plate having an aperture therein fitting closely at least round the sides and top of the leveler-bar with guide members attached to the sealing-plate whereby the latter rides freely on the leveler-bar, the sealing-plate being held against the leveler-bar door opening during the operation of leveling the charge.

Figures 1, 2 and 3 of the accompanying drawings illustrate one practical embodiment of the present invention.

Figure 1 represents a side sectional elevation,

Figure 2 is a front elevation, and

Figure 3 a plan.

Figure 4 of the accompanying drawings shows in a vertical sectional elevation an alternative form of the present invention.

Referring to Figures 1, 2 and 3, the coke-oven door I contains a leveler-bar door 2, through which the leveler-bar 3 enters for the purpose of leveling the charge in the oven. As shown, the leveler-bar is of girder construction comprising side members joined at intervals by crosspieces 4. It is apparent from the figures that the cross-section of the leveler-bar is substantially less than the size of the leveler-door opening, so that a gap 5 would normally exist, through which air could enter the oven.

The spillage-chute 6,'which is mounted on the machine carrying the pusher-ram and the levelerbar, receives any coal drawn out of the oven in the rearward strokes of the leveler-bar 3, and for this purpose, during leveling, the spillage-chute occupies the position shown in Figure 1. In accordance with the present invention, the spillagechute carries a sealing-plate I, which sealingplate has an aperture therein for the passage of the leveler-bar into the oven. The sealing-plate l is adjustably attached to the spillage-chute by the side-plates 8, by means of the bolts 9 which pass through the slots shown in Figure 1. By means of this arrangement the vertical level of the sealing-plate I can be adjusted as desired to suit any alteration in the height of the levelerbar.

It will be noted that the size of the sealingplate I is greater than the actual opening of the leveler-door, in order to provide a sufiicient amount of overlap to ensure that the opening is sealed, even if the leveler-bar is not positioned truly centrally in the door opening.

The sealing-plate 1 also carries a rearwardly extending plate H] which lies along the top of the leveler-bar.

In the operative position, the spillage-chute and the sealing plate occupy the position shown in full lines in Figure 1. It will be seen that the annular gap between the leveler-bar and the leveler-door is closed thereby. A leakage path for air does exist through the interior of the leveler-bar if the latter is of open girder construction, but the amount air entering by this path is comparatively small and is further reduced by the bafiiing efiect of the plate l0 and the cross members 4. After leveling, when the leveler-bar is withdrawn from the oven, the spillage-chute and the sealing-plate occupy the outof-service position shown respectively at 6a and 1a. By mounting the sealing-plate on the spillage-chute as shown, it is held in position during the leveling operation and is not disturbed by the reciprocating motion of the leveler-bar.

The alternative embodiment shown in Figure 4 may be applicable in certain circumstances. In this case the sealing-plate l is slotted and fits closely round the top and sides of the levelerbar 3. The building up of the coal in the oven to the bottom of the leveler-bar is relied on to effect a substantial degree of sealing beneath the leveler-bar. Guide members for the sealingplate are formed by the rearwardly-extending plate l0 and the inverted U-shaped element II, which projects from the sealing-plate a short distance into the oven. The sealing-plate I is maintained in position during the leveling operation by a strut or struts l2, projecting from some convenient portion of the machine carrying the leveler-bar. After leveling the charge, the sealing-plate is drawn back with the struts l2 so that the sealing-plate rides on the top of the leveler-bar.

In the arrangement of Figure 4, the sealing of the gap 5 is not perfect, but is sufiicient to reduce substantially the amount of air entering the oven. If the leveler-bar is of open girder construction, the length of the guide members l0 and I I are preferably made equal to or greater than the distance between successive spacing members 4 in order to baille the ingress of air through the leveler-bar structure.

I claim:

I. In horizontal coke-ovens in which the charge in an oven is leveled by a leveler-bar operating through a leveler-door, and including a coal spillage-chute capable of being positioned in close proximity to said leveler-door to collect coal escaping therefrom, 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 having therein an aperture for the passage of the leveler-bar, which sealing-plate is large enough to cover the leveler-door opening and is mounted on the spillage-chute and is held against the open leveler-door when the spillagechute is in the operative position and after leveling is completed is retracted with the spillage-chute to the out-of-service position.

2. In horizontal coke-ovens having means to close substantially any gap between the levelerbar and the leveler-bar door, as claimed in claim 1, the provision on the side of the sealing-plate remote from the leveler-door of a plate which in the operative position of the sealing-plate extends along the top of the leveler-bar.

3. In horizontal coke-ovens in which the charge in an oven is leveled by a leveler bar operating through a leveler-door, and including a coal spillage-chute capable of being positioned in close proximity to said leveler-door to collect coal escaping therefrom during leveling, 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 larger than the leveler-door opening and containing an aperture for the passage of the leveler-bar, which sealingplate is adjustably mounted on the spillage-chute and is held against the open leveler-door when the spillage-chute is in the operative position and after leveling is completed is retracted with the spillage-chute to the out-of-service position, with a plate projecting perpendicularly from the side of the sealing-plate remote from the levelerdoor and adapted to extend horizontally along the top of the leveler-bar when the same is in operation.

4. In horizontal coke-ovens in which the charge in an oven is leveled by a leveler-bar formed of parallel side plates separated by crosspieces at intervals, and 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 mounted on and fitting closely round at least the top and sides of the leveler-bar, which sealing-plate is larger than the leveler-door opening, guide members attached to the sealing-plate, which guide members comprise a member encircling at least the sides and top of the leveler-bar on the side of the sealing-plate towards the leveler-door, and

a plate extending along the top of the leveler- 7 bar on the opposite side of the sealing-plate, the total length of the guide members being at least equal to the spacing of the cross-pieces in the leveler-bar, together with means to hold the sealing-plate against the leveler-door during the operation of leveling,

ALAN TAYLOR.