JPS6115916B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a knife edge attachment device for a coke oven lid.

Conventionally, in the lid of a coke oven, the knife edge was supported by flexible seal plates on the four sides of the lid body, and the knife edge was always pressed against the lid frame by the elastic force of the seal plate. Even if the furnace lid body is thermally deformed in the direction that creates a gap between the knife edge and the furnace lid frame, the elastic deformation of the seal plate absorbs the thermal deformation and prevents a gap from forming between the knife edge and the furnace lid frame. I was doing it.

However, when the hearth body is thermally deformed, the hearth body is largely thermally deformed in the longitudinal direction, and the gap between the short sides of the hearth body and the hearth frame becomes larger than the long sides. Therefore, the knife edge provided along the short side of the lid body must be supported by a wide seal plate. On the other hand, in the conventional furnace lid body and furnace lid frame, the distance between the short side of the furnace lid and the position where the knife edge can come into contact with the furnace lid frame is short, and there is no room to attach the knife edge due to the large width seal plate. When replacing the conventional knife edge of the furnace lid main body, it has not been possible to adopt a structure in which the knife edge is supported by a seal plate.

In view of the above points, the present invention provides a knife edge attachment device for a coke oven lid that absorbs thermal deformation of the lid body, provides a reliable seal, and can be attached to an existing lid body. be.

Hereinafter, one embodiment of the present invention will be described based on the drawings. In FIGS. 1 and 2, 1 is a furnace lid frame provided on the side surface of the furnace main body, 2 is a rectangular furnace lid main body, and a rectangular knife edge mounting plate 3 is provided on the outer periphery of the furnace lid main body 2. (Figures 3 and 4) are fitted. A tapered notch surface 4 is provided at the four corners of the furnace cover body 2, and between the notch surface 4 and the knife edge mounting plate 3, there is a vertical plate 5 that is in contact with the notch surface 4, and a vertical plate 5 and It is closed by a triangular sealing plate 6 welded to the knife edge mounting plate 3, thereby providing a gas seal. A knife edge 7 (FIG. 6, FIG. 9, etc.) is attached to the knife edge mounting plate 3 along the pair of opposing short sides 2a on the outer periphery of the furnace cover body 2.
are provided in contact with the outer surface, and the knife edge 7 is attached to the furnace lid body 2 together with the knife edge mounting plate 3 by clamping devices 8 arranged at appropriate intervals in the longitudinal direction. As shown in FIGS. 6 to 8, a knife edge 10 is provided on a knife edge mounting plate 3 along a pair of opposing long sides 2b of the outer periphery of the furnace lid body 2 via a flexible seal plate 9. The knife edge 10 includes spring devices 19 (FIGS. 11 to 14) arranged at appropriate intervals in the longitudinal direction to press the knife edge 10 in the width direction, a support body 30 to which the spring devices 19 are attached, and the seal. It is attached to the furnace lid body 2 by a support device 50 having a plate 9.

The seal plate 9 is made of stainless steel, and U
One opposing piece is fixed to the knife edge mounting plate 3, and the other opposing piece has a knife edge 10 fixed thereto. The seal plate 9 and the knife edge mounting plate 3 are fixed by bolts 11 arranged at appropriate intervals in the longitudinal direction. 12
is the seat board. The sealing plate 9 and the knife edge 10 are fixed by a backing plate 1 along substantially the entire length of the sealing plate 9.
3 and bolts and nuts 14 arranged at appropriate intervals in the longitudinal direction. The knife edge 10 on the long side 2b and the knife edge 7 on the short side 2a are welded 15 to each other at their ends. Both ends of the seal plate 9 are end plates 1 welded to the seal plate 9.
6. An end 7a of the knife edge 7 on the short side 2a is located on the outer surface of the end plate 16, and the end 7a and the end plate 16 are inserted through the bolt holes of the end 7a and the end plate 16. bolt·
They are tightened together by a nut 17 via a packing 18. Note that the furnace lid main body 2 is pressed against the furnace lid frame 2 by an elastic body via a bolting device.

Figures 9 and 10 show the knife edge 7 of the short side 2a.
The clamping device 8 of FIG. The back edge of the knife edge 7 opposite to the cutting edge engages with an engaging portion 3b provided over the entire length of the outer surface of the knife edge mounting plate 3. The edge of the knife edge mounting plate 3 on the oven lid frame side slightly protrudes from the inner surface 20 of the oven lid body 2, and the cutting edge of the knife edge 7 further protrudes from the knife edge mounting plate 3 and comes into contact with the oven lid frame 1. . Reference numeral 21 denotes a hammering metal fitting, which has a tapered plate body 21a having a thick wall at one end in the longitudinal direction as a main body, and is in contact with the outer surface of the knife edge 7 at a contact portion formed by the thick end. On both sides of the back surface of the plate body 21a, ribs 22 extending from the thin end to the center in the longitudinal direction are provided, and the ends of the ribs 22 are connected to the back edge 3a of the knife edge mounting plate 3.
is in contact with A long hole 23 along the longitudinal direction is provided in the center of the plate body 21a. Reference numeral 24 denotes a holding plate that is brought into contact with the hammering metal fitting 8, and has a tapered wall thickness such that the thinner side of the hammering metal fitting 21 is thicker, and has a hole 24a in the center. These clamping plates 24
The hole 24a and the elongated hole 23 of the hammering metal fitting 21 include
Bolts 27 are inserted through the mounting holes 25 in the side wall of the furnace lid body 2 and the notches 26 in the knife edge mounting plate 3. By tightening a nut 29 screwed onto the tip of the bolt 27 via a spring washer 28, the knife edge mounting plate 3, knife edge 7, striking metal fitting 21, and clamping plate 24 are integrally fixed to the furnace lid body 2.

11-14 show the support device 50, 3
0 is a support main body, which includes twin drum hitting plate parts 30a, 3.
0b, and a connecting plate portion 30c that connects both striking plate portions 30a and 30b, and is brought into contact with the knife edge mounting plate 3 via a seal plate 9. Both striking plate portions 30a and 30b are formed to have a tapered thickness such that the end end on the side of the furnace lid frame 1 is thick. Further, a long hole 31 extending in the longitudinal direction is provided in the center of both striking plate portions 30a, 30b, and ribs 32 are provided on both sides of the long hole 31. The rib 32 extends from the thin end of the rectangular plate portions 30a, 30b to the center in the longitudinal direction, and the end portion of the rib 32 is in contact with the back edge portion 3a of the knife edge mounting plate 3. Reference numeral 33 denotes a clamping plate that is brought into contact with the outer surface of the beating plate parts 30a, 30b of the support body 30, and has a tapered wall thickness such that the thinner side of the beating plate parts 30a, 30b is thicker, and has a hole in the center. 3
3a. Holes 33a of these clamping plates 33
And the elongated hole 31 of the support body 30 is provided with the furnace cover body 2.
mounting hole 34 on the side wall and knife edge mounting plate 3
The bolt 36 inserted through the notch 35 is inserted. Spring washer 37 at the tip of bolt 36
By tightening the nut 38 screwed through the
The knife edge mounting plate 3, the support body 30, and the clamping plate 33 are integrally fixed to the furnace lid body 2. A protruding piece 39 is provided on the connecting plate portion 30c of the support body 30, and one end of a cylindrical support frame 40 constituting the spring device 19 is screwed into a screw hole provided in the protruding piece 39. . The support frame 40 has a presser shaft 41 that contacts the back edge 10a of the knife edge 10 slidably fitted therein. Inside the support frame 40 is an elastic body 4 whose one end engages with the flange 41a of the presser shaft 41 to urge the presser shaft 41 toward the knife edge 10 side.
2 is placed. The elastic body 42 is made of a coil spring, and its other end engages with a hollow shaft-shaped adjustment screw 43 screwed onto the support frame 40 .
A ring-shaped stopper 44 is fixed within the support frame 40 and engages with the flange 41a of the presser shaft 41. 4
5 is a lock nut fitted onto the support frame 40.

Next, the effect will be explained. The knife edge 7 on the short side 2a is knocked out toward the furnace lid frame 1 side together with the knife edge mounting plate 3 by hitting the head of the hitting metal fitting 21 with a hammer or the like. At this time, tap metal fitting 2
Since the knife edge 1 is formed into a tapered surface and is fastened with the bolt 27 together with the clamping plate 24, the knife edge 7, once knocked out, will not easily return.

The knife edge 10 on the long side 2b is pressed by the elastic body 42 via the holding shaft 41 of the spring device 19, and is also elastically pressed against the furnace lid frame 1 by the flexibility of the seal plate 9. Therefore, even if the furnace lid body 2 and the furnace lid frame 1 are slightly deformed during operation of the furnace, the knife edge 10 and the furnace lid frame 1 are always kept in close contact. If gas leaks occur due to large deformation of the furnace cover body 2, etc., the support body 30
By hitting the knife edge 10, the knife edge 10 can be struck out. That is, by hitting the support body 30, the knife edge 10 together with the knife edge mounting plate 3 is knocked out toward the furnace lid frame 1 side. At this time, since the support frame 40 holding the presser shaft 41 is attached to the support body 30', the knife edge 1
The relative position between 0 and the support frame 40 is constant. Therefore, there is no significant increase or decrease in the spring pressing force due to the positional movement of the knife edge, which has been seen in many conventional types, and the knife edge 10 can always be pressed toward the furnace lid frame 1 with a constant force. Therefore, reliable sealing is achieved. This pressing force can be adjusted using an adjustment screw 43. Note that, since the seal plate 9 is fragile, it is necessary to prevent excessive deformation during knocking out or the like. On the other hand, if the end 3b of the knife edge mounting plate 3 on the furnace lid frame side is made to protrude beyond the seal plate 9 as in the embodiment, if the amount of knockout is excessive, the knife edge mounting plate 3 It comes into contact with the lid frame 1 and serves as a stopper, thereby preventing excessive deformation of the seal plate 9. In addition, when the furnace lid body 2 is removed from the furnace body and the knife edge 10 becomes free, the flange 41a of the pressing shaft 41 comes into contact with the stopper 44, so that the knife edge 10 is excessively moved by the elastic body 42''. Pressure is prevented.

It is appropriate that the sum of the pressing forces exerted by the elastic bodies 42 of the respective spring devices 19 that press the knife edge 10 on the long side 2b be adjusted to 20 to 40% of the pressing force exerted by the canning device that presses the entire furnace lid body 2. It is. As a result, 40 to 60% of the pressing force by the elastic body of the barring device acts as a force pressing against the knife edge 7 on the short side, which has no elastic force. As a result, while firmly pressing the knife edge 7 on the short side 2a and sufficiently preventing gas leakage from the knife edge 7, the thermal deformation of the furnace lid frame 1 and the furnace lid body 2 that occurs during steady operation can be prevented on the long side 2b. knife edge 10
It can be absorbed elastically. Therefore, the work of knocking out the knife edges 7, 10 on both sides 2a, 2b is sufficient only at the initial stage of attachment of the furnace lid body 2 to the furnace body, and the work of knocking out the knife edges 7, 10 on both sides 2a, 2b during operation can be reduced. Furthermore, by reducing the need for knocking out work, damage to the sealing surface of the furnace lid frame 2 and the knife edges 7, 10 is reduced, and durability is improved.

In this way, the knife edge 7 on the short side 2a is rigidly attached by the clamping device 8 in contact with the furnace cover body 2, and the knife edge 10 on the long side 26 is elastically attached by the support device 50 having the seal plate 9 and the spring device 19. By supporting both sides 2a and 2b, a reliable seal can be obtained. Moreover, short side 2a
Since the knife edge 7 is provided in contact with the furnace lid body 2, unlike the case where the knife edge 7 around the entire circumference of the furnace lid body is supported via a seal plate, a wide seal plate is not required on the short side 2a. Therefore, it is possible to use an existing furnace lid body in which the distance between the side surface of the furnace lid body 2 and the sealable knife edge contact position of the furnace lid frame 1 is short.

In addition, both sides 2a, 2 at the four corners of the furnace cover body 2
If the fixing structure between the knife edges 7, 10 and the seal plate 9 in b is the same as that described above in conjunction with FIGS.
When replacing the knife, the replacement can be done simply by attaching and detaching the welds 15 at the four corners and the bolts 14 for attaching the knife edge. In addition, the knife edges 7 and 10 and the seal plate 9
Since most of the members are fastened with bolts and nuts, there is no welding distortion and there is little restraint, so that the seal plate 9 can be easily deformed and the knife edge 10 can provide a good gas seal. I can do it. Furthermore, like this bolt,
By tightening with nuts, each member can be replaced individually, making maintenance easy.

As explained above, according to the present invention, the knife edge on the short side of the outer periphery of the furnace lid body is supported by the clamping device, and the knife edge on the long side is elastically supported by the support device having a spring device and a seal plate. With this structure, thermal deformation of the furnace lid main body can be absorbed by the spring device and the seal plate to obtain a reliable seal, and moreover, it can be attached to an existing furnace lid main body.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a longitudinal side view showing the relationship between the furnace lid body and the furnace lid frame, FIG. 2 is a front view of the same, and FIG. A front view showing the knife edge mounting plate structure, Fig. 4 is a side view of the same, Fig. 5 is a perspective view of the vertical plate, Fig. 6 is a front view of the knife edge mounting structure at the corner of the furnace lid, and Fig. 7 is a cutaway of the same. A side view, FIG. 8 is a sectional view of the knife edge mounting structure on the vertical side, FIG. 9 is a sectional view of the knife edge clamping device, and FIG. 10 is a front view of the same.
Fig. 11 is a front view of the knife edge pressing device, Fig. 12 is a plan view of the same, and Fig. 13 is the − of Fig. 11.
14 is a sectional view taken along the - line in FIG. 11. 1... Furnace cover frame, 2... Furnace cover body, 3... Knife edge mounting plate, 7, 10... Knife edge, 8...
... Clamping device, 9... Seal plate, 19... Spring device, 21... Hitting metal fittings, 24... Clamping plate, 2
7...Bolt, 30...Support body, 33...Holding plate, 36...Bolt, 40...Support frame, 41...
Presser shaft, 42...Elastic body, 43...Adjustment screw, 4
4...stopper, 50...support device.

Claims (1)

[Claims] 1 A knife edge is held along a pair of opposing short sides of the outer periphery of the rectangular oven lid body by a clamping device having an engaging part for the back edge of the knife edge and a contact part for the outer surface of the knife edge. a spring device that is attached to the knife edge along a pair of opposing long sides and presses the knife edge in the width direction by contacting the back edge of the knife edge; a support body to which the spring device is attached; and a support body and the knife edge. 1. A knife edge attachment device for a coke oven lid, characterized in that it is attached to a furnace lid body by a support device having a flexible seal plate interposed therebetween.