CA1099660A - Sealing means for coke oven doors - Google Patents
Sealing means for coke oven doorsInfo
- Publication number
- CA1099660A CA1099660A CA292,760A CA292760A CA1099660A CA 1099660 A CA1099660 A CA 1099660A CA 292760 A CA292760 A CA 292760A CA 1099660 A CA1099660 A CA 1099660A
- Authority
- CA
- Canada
- Prior art keywords
- knife edge
- coke oven
- spindle
- receiving frame
- door
- 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
- 239000000571 coke Substances 0.000 title claims abstract description 26
- 238000007789 sealing Methods 0.000 title claims abstract description 21
- 239000011449 brick Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 4
- 238000003915 air pollution Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
Landscapes
- Coke Industry (AREA)
Abstract
Abstract of the Disclosure A device for sealing the periphery of a coke oven door with a receiving frame of a coke oven furnace, wherein there is provided a coke oven door to seal the opening of a coke oven furnace, comprising a knife edge provided at the periphery of a sealing plate adopted as sealing means for said door, and said knife edge is so constructed as to be always pressed or biased against the receiving frame surrounding the coke oven furnace opening by means of spring, and when necessary, by hitting said knife edge or adjusting spring force sealing performance can be improved.
Description
1~99660 The present invention is related in general to the construction of coke oven doors and, in particular, to a new and useful device for sealing the periphery of a coke oven door to a receiving frame of a coke oven fur~mce .
Prior to the present invention, so-called "knife edge" sealing material was applied to the portion to be directly sealed. The knife edge was provided in the shape of a band around the door body, and the tip of knife edge being in contact with the receiving frame surrounding the opening of the coke oven furnace. When any gap arises between the receiving frame and the tip of the knife edge, the latter is adjusted by being struck or pressed in order to close such gap.
Cne method of adjustment has been to push out or press the knife edge by hitting it directly by means of a hammer or the like.
Another method has been to urge or bias the knife edge continuously by means of spring.
The first method when used has the disadvantage that such hammering operations can be dangerous since they must be repeatedly carried out at heights of more than seven meters, while the second method has the disadvantage that a gap can easily be created because of insufficient spring force, as when a lump of tar or other foreign matter lodges between the knife edge and the receiving frame.
Thus the proposed present invention is to provide a useful and new device improved by combining usefully said two systems while making the best use of the merits and eliminating the defects thereof.
The invention provides a device for sealing the periphery of a coke oven door with respect to a receiving frame defining an opening to a coke oven furnace, comprising: a coke oven door having a sealing plate adapted to close said opening; a knife edge seal extending around the periphery of said sealing plate and adapted to be in sealing contact with said receiving frame, said knife edge seal being carried on a plurality of holders on said door situated behlnd said knife edge seal; each said holder comprising a spindle having a forward end which receives the rear of said knife edge seal, means guiding ,~
, " 1(~99660 said spindle for movement of said seal towards and away from said receiving frame, and resilient means operative to urge said knife edge seal continuous-ly towards said receiving frame; said spindle having a rear end accessible to be engaged by impact means to apply an impact force to urge said seal towards said receiving frame.
Preferably the device includes means for adjusting the force of said resilient means.
The invention will further be described, by way of example only, with reference to the annexed drawings wherein:
Figure 1 is a front elevation of an embodiment in accordance with the present invention.
Figure 2 is a sectional view of Figure 1 taken on the line A - A.
Figure 3 is a sectional view of Figure 1 taken on the line B - B.
Figure 4 is an enlarged sectional view taken on the line C - C.
In the drawings, 1 designates a door body of a coke oven door adapted to seal an opening 3a of a coke oven furnace 3. At the portion of the door body which is to be situated in the opening 3a there is provided a spacer b attached to a metal brick supporter la including a b~ick block lb.
Between the door body 1 and the supporter 1_ is a space a which corresponds to thickness of the spacer b.
A sealing plate 2 secured to one side of the brick supporter la, and at the periphery of the plate 2 there is provided a knife edge 8 adapted to contact a receiving frame 12 provided at the periphery of the opening 3a of the coke oven furnace 3. The sealing plate 2 is so shaped as to totally cover and seal the opening 3a.
The door body 1 includes air flow windows lc and locking bars 13 on the front side thereof. At the front of the coke oven furance 3 there are engaging arms 14 to be engaged by the locking bars 13.
Adjustment devices 4 are provided around the periphery of the door body 1, at fixed intervals, as shown in Figure 1, and adapted to adjust the knife edge 8. In the disclosed embodiment the adjustment devices are spaced at intervals of 27cm.
l(~S9660 Figure 4 shows the details of the adjustment device 4. A
cylinder-shaped holder 5 is secured to the door body 1, and has an internally threaded portion 15 at its upper end. The threaded portion 15 is engaged by an adJustment member 6 having a central bore 6c. The adjustment member 6 ls also provided with a drive portion 6a at the upper part thereof extending above the holder 5.
A spindle 7 in the holder 5 passes with clearance through the adjust-ment member 6 by way of a bore 6c. The spindle is provided at its lower end with a groove 7c to be engaged by a head 8a of the knife edge 8, and with a collar 9 at the portion thereof which is to be located within the lower por-tion of the holder 5.
The upper portion 7b of the spindle 7 extends above the drive por-tlon 6a of the adjustment member 6 and has a stopper nut 11 secured to its upper end.
A coil sprlng 10 ls po~itioned within the holder 5 between the collar 9 ant the adjustment member 6, and acts to urge the spindle 7 constant-ly against the knife edge 8.
The coke oven door thus described is able to seal the opening 3a of coke oven furnace 3 securely, as shown in Figure 3, since the sealing plate 2 closes the opening 3a while the knife edge 8 is in close contact with the receiving fra~e 12 to form a continuous peripheral seal.
High temperatures in the coke oven furnace 3 are scarcely trans-ferred to the door body 1 because the air layer in space a between the brick supporter la, the sealing plate 2 and door body 1 serves to isolate such heat.
In particular, the space or gap a is connected to atmospheric air by way of the gaps located therearound and the air flow windows lc. Thus a natural air circulation is generated, so that effective isolation of heat is made possible.
The metal brick supporter la is usually heated to 200~400C because of the high temperatures in the coke oven, and for this reason is likely to be distorted or deformed. The receiving frame 14 is also generally heated to 70~120C, so that it may be subject to deformation or distortion.
Deformation or dlstortion of the supporter la is transferred directly from the sealing plate 2 to the knife edge 8, so that the fit between the latter and the receiving frame 12 deteriorates. In many cases gaps are produced through which gas may leak from the coke oven furnace resulting in air pollution. In order to prevent this, the apparatus is adapted to bias the head 8a of knife edge 8 continuously towards the frame 14 through the spindle 7 and coil spring 10. This prevents separation of the knife edge from the receiving frame 12, so that no gaps are created.
Should the biasing force acting on the knife edge 8 become weaker, the force of the coil spring 10 can be adjusted adequately by turning the drive portion 6a to move the adjustment member 6 further into the holder 5 along the screw thread 15 and compress the spring 10.
By suitable adjustment around the door body 1 the knife edge 8 is able to maintain firm sealing.
Such material as tar is likely to adhere to the surface of the recelving frame 12, and when it adheres, it is no~ possible to break it by means o the coil spring 10, so that a gap is generated. In such a case it is necessary to hammer the stopper nut 11 of the spindle 7. When the spindle is strongly hammered or hit, the knife edge 8 forcibly breaks or slices into the solid material in order to eliminate the gap.
In the present invention, as mentioned above, the knife edge 8 is always biased or pressed against the receiving frame 12 by means of the - coil springs 10, so even if the brick supporter la and the receiving frame 12 are deformed or distorted due to heat, it is possible to obtain a secure sealing.
The pressing force of the coil springs 10 against the knife edge 8 can be freely adjustable by rotating the adjustment member 6. Should foreign material lodge between the receiving frame 12 and the knife edge 8, it can be removed by striking the stopper nut 11 oE the spindle 7.
Accordingly, the present invention can contribute greatly to the prevention of air pollution and unsafe working conditions, since the danger o leakage of gas, tar or the like is reduced due to the fact that opening 3a is always securely sealed by a coke oven door during operation. Even if " ~399660 a gap should devel~p between the knife edge 8 and the receiving frame 12, it can be easily eliminated as described above.
B
Prior to the present invention, so-called "knife edge" sealing material was applied to the portion to be directly sealed. The knife edge was provided in the shape of a band around the door body, and the tip of knife edge being in contact with the receiving frame surrounding the opening of the coke oven furnace. When any gap arises between the receiving frame and the tip of the knife edge, the latter is adjusted by being struck or pressed in order to close such gap.
Cne method of adjustment has been to push out or press the knife edge by hitting it directly by means of a hammer or the like.
Another method has been to urge or bias the knife edge continuously by means of spring.
The first method when used has the disadvantage that such hammering operations can be dangerous since they must be repeatedly carried out at heights of more than seven meters, while the second method has the disadvantage that a gap can easily be created because of insufficient spring force, as when a lump of tar or other foreign matter lodges between the knife edge and the receiving frame.
Thus the proposed present invention is to provide a useful and new device improved by combining usefully said two systems while making the best use of the merits and eliminating the defects thereof.
The invention provides a device for sealing the periphery of a coke oven door with respect to a receiving frame defining an opening to a coke oven furnace, comprising: a coke oven door having a sealing plate adapted to close said opening; a knife edge seal extending around the periphery of said sealing plate and adapted to be in sealing contact with said receiving frame, said knife edge seal being carried on a plurality of holders on said door situated behlnd said knife edge seal; each said holder comprising a spindle having a forward end which receives the rear of said knife edge seal, means guiding ,~
, " 1(~99660 said spindle for movement of said seal towards and away from said receiving frame, and resilient means operative to urge said knife edge seal continuous-ly towards said receiving frame; said spindle having a rear end accessible to be engaged by impact means to apply an impact force to urge said seal towards said receiving frame.
Preferably the device includes means for adjusting the force of said resilient means.
The invention will further be described, by way of example only, with reference to the annexed drawings wherein:
Figure 1 is a front elevation of an embodiment in accordance with the present invention.
Figure 2 is a sectional view of Figure 1 taken on the line A - A.
Figure 3 is a sectional view of Figure 1 taken on the line B - B.
Figure 4 is an enlarged sectional view taken on the line C - C.
In the drawings, 1 designates a door body of a coke oven door adapted to seal an opening 3a of a coke oven furnace 3. At the portion of the door body which is to be situated in the opening 3a there is provided a spacer b attached to a metal brick supporter la including a b~ick block lb.
Between the door body 1 and the supporter 1_ is a space a which corresponds to thickness of the spacer b.
A sealing plate 2 secured to one side of the brick supporter la, and at the periphery of the plate 2 there is provided a knife edge 8 adapted to contact a receiving frame 12 provided at the periphery of the opening 3a of the coke oven furnace 3. The sealing plate 2 is so shaped as to totally cover and seal the opening 3a.
The door body 1 includes air flow windows lc and locking bars 13 on the front side thereof. At the front of the coke oven furance 3 there are engaging arms 14 to be engaged by the locking bars 13.
Adjustment devices 4 are provided around the periphery of the door body 1, at fixed intervals, as shown in Figure 1, and adapted to adjust the knife edge 8. In the disclosed embodiment the adjustment devices are spaced at intervals of 27cm.
l(~S9660 Figure 4 shows the details of the adjustment device 4. A
cylinder-shaped holder 5 is secured to the door body 1, and has an internally threaded portion 15 at its upper end. The threaded portion 15 is engaged by an adJustment member 6 having a central bore 6c. The adjustment member 6 ls also provided with a drive portion 6a at the upper part thereof extending above the holder 5.
A spindle 7 in the holder 5 passes with clearance through the adjust-ment member 6 by way of a bore 6c. The spindle is provided at its lower end with a groove 7c to be engaged by a head 8a of the knife edge 8, and with a collar 9 at the portion thereof which is to be located within the lower por-tion of the holder 5.
The upper portion 7b of the spindle 7 extends above the drive por-tlon 6a of the adjustment member 6 and has a stopper nut 11 secured to its upper end.
A coil sprlng 10 ls po~itioned within the holder 5 between the collar 9 ant the adjustment member 6, and acts to urge the spindle 7 constant-ly against the knife edge 8.
The coke oven door thus described is able to seal the opening 3a of coke oven furnace 3 securely, as shown in Figure 3, since the sealing plate 2 closes the opening 3a while the knife edge 8 is in close contact with the receiving fra~e 12 to form a continuous peripheral seal.
High temperatures in the coke oven furnace 3 are scarcely trans-ferred to the door body 1 because the air layer in space a between the brick supporter la, the sealing plate 2 and door body 1 serves to isolate such heat.
In particular, the space or gap a is connected to atmospheric air by way of the gaps located therearound and the air flow windows lc. Thus a natural air circulation is generated, so that effective isolation of heat is made possible.
The metal brick supporter la is usually heated to 200~400C because of the high temperatures in the coke oven, and for this reason is likely to be distorted or deformed. The receiving frame 14 is also generally heated to 70~120C, so that it may be subject to deformation or distortion.
Deformation or dlstortion of the supporter la is transferred directly from the sealing plate 2 to the knife edge 8, so that the fit between the latter and the receiving frame 12 deteriorates. In many cases gaps are produced through which gas may leak from the coke oven furnace resulting in air pollution. In order to prevent this, the apparatus is adapted to bias the head 8a of knife edge 8 continuously towards the frame 14 through the spindle 7 and coil spring 10. This prevents separation of the knife edge from the receiving frame 12, so that no gaps are created.
Should the biasing force acting on the knife edge 8 become weaker, the force of the coil spring 10 can be adjusted adequately by turning the drive portion 6a to move the adjustment member 6 further into the holder 5 along the screw thread 15 and compress the spring 10.
By suitable adjustment around the door body 1 the knife edge 8 is able to maintain firm sealing.
Such material as tar is likely to adhere to the surface of the recelving frame 12, and when it adheres, it is no~ possible to break it by means o the coil spring 10, so that a gap is generated. In such a case it is necessary to hammer the stopper nut 11 of the spindle 7. When the spindle is strongly hammered or hit, the knife edge 8 forcibly breaks or slices into the solid material in order to eliminate the gap.
In the present invention, as mentioned above, the knife edge 8 is always biased or pressed against the receiving frame 12 by means of the - coil springs 10, so even if the brick supporter la and the receiving frame 12 are deformed or distorted due to heat, it is possible to obtain a secure sealing.
The pressing force of the coil springs 10 against the knife edge 8 can be freely adjustable by rotating the adjustment member 6. Should foreign material lodge between the receiving frame 12 and the knife edge 8, it can be removed by striking the stopper nut 11 oE the spindle 7.
Accordingly, the present invention can contribute greatly to the prevention of air pollution and unsafe working conditions, since the danger o leakage of gas, tar or the like is reduced due to the fact that opening 3a is always securely sealed by a coke oven door during operation. Even if " ~399660 a gap should devel~p between the knife edge 8 and the receiving frame 12, it can be easily eliminated as described above.
B
Claims (7)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A device for sealing the periphery of a coke oven door with respect to a receiving frame defining an opening to a coke oven furnace, comprising:
a coke oven door having a sealing plate adapted to close said opening; a knife edge seal extending around the periphery of said sealing plate and adapted to be in sealing contact with said receiving frame, said knife edge seal being carried on a plurality of holders on said door situated behind said knife edge seal; each said holder comprising a spindle having a forward end which receives the rear of said knife edge seal, means guiding said spindle for movement of said seal towards and away from said receiving frame, and resilient means operative to urge said knife edge seal continuously towards said receiving frame; said spindle having a rear end accessible to be engaged by impact means to apply an impact force to urge said seal towards said receiving frame.
a coke oven door having a sealing plate adapted to close said opening; a knife edge seal extending around the periphery of said sealing plate and adapted to be in sealing contact with said receiving frame, said knife edge seal being carried on a plurality of holders on said door situated behind said knife edge seal; each said holder comprising a spindle having a forward end which receives the rear of said knife edge seal, means guiding said spindle for movement of said seal towards and away from said receiving frame, and resilient means operative to urge said knife edge seal continuously towards said receiving frame; said spindle having a rear end accessible to be engaged by impact means to apply an impact force to urge said seal towards said receiving frame.
2. A device according to claim 1 wherein each said holder includes means for adjustment of the force of the respective resilient means.
3. A device according to claim 1 or 2, wherein said resilient means comprises a coil spring.
4. A device according to claim 1 wherein said guide means comprises a tubular sleeve fixed to said door, said spindle being received and guided co-axially within said sleeve, and said resilient means comprising a coil spring enclosing a length of said spindle within said sleeve and loaded in compression between a collar on said spindle and an abutment at the rear end of said sleeve.
5. A device according to claim 4 wherein said abutment is formed by an adjustment member which is in screw-threaded engagement with said sleeve and is rotatable with respect thereto to selectively alter the position of the adjustment member axially of the sleeve and hence vary the force of said coil spring.
6. A device according to claim 5 wherein said spindle extends axially through said adjustment member and terminates in a head accessible at the rear of said sleeve.
7. A device according to claim 1, 4 or 5, wherein said door carries a metal supporter to which is attached a brick block which is adapted to be received within and substantially fill said opening of the furnace to shield said door and seal from exposure to the temperature within the furnace.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP51-166217 | 1976-12-10 | ||
| JP16621776 | 1976-12-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1099660A true CA1099660A (en) | 1981-04-21 |
Family
ID=15827268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA292,760A Expired CA1099660A (en) | 1976-12-10 | 1977-12-09 | Sealing means for coke oven doors |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU508092B2 (en) |
| CA (1) | CA1099660A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5720855A (en) * | 1996-05-14 | 1998-02-24 | Saturn Machine & Welding Co. Inc. | Coke oven door |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO334055B1 (en) | 2012-02-28 | 2013-11-25 | Advantec As | Reel with interchangeable drum, as well as procedure using the same |
| CN103525438B (en) * | 2013-10-31 | 2015-08-12 | 攀钢集团攀枝花钢钒有限公司 | A kind of maintenance and renovation method of waste and old fire door knife edge |
-
1977
- 1977-12-09 AU AU31425/77A patent/AU508092B2/en not_active Expired
- 1977-12-09 CA CA292,760A patent/CA1099660A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5720855A (en) * | 1996-05-14 | 1998-02-24 | Saturn Machine & Welding Co. Inc. | Coke oven door |
Also Published As
| Publication number | Publication date |
|---|---|
| AU508092B2 (en) | 1980-03-06 |
| AU3142577A (en) | 1979-06-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |