JPH08283724A - Cover of coke oven - Google Patents

Abstract

PURPOSE: To reduce the quantity of heat transferred from a leveling port on the cover to a pressure contact device and to thereby lower the temperature of the pressure contact spring to prevent the spring from lowering in strength by forming a recessed groove in the seat of the pressure contact device near the leveling port on the pushing side. CONSTITUTION: A knife edge 6 is provided around a cover 1, a seal plate 5 is formed inside the knife edge 6 and fixed on the cover 1, and a pressure contact device 3 which presses the knife edge 6 against an oven frame 7 provided around the outer periphery of the inlet of the coke oven. A recessed groove 4 is formed in the seat of the device 3 near the leveling port 2 formed on the upper part of the cover 1, and the device 3 and the seat are fastened together with bolts. By thus forming the seat of the device 3 near the port 2 of the cover on the pushing side, the heating surface area between the seat and the device 3 can be reduced, the transfer of the heat in the oven to the device 3 can be reduced, air can flow into the groove 4, the area of contact of the device 3 with air can be increased, and the cooling effect can be improved by natural draft cooling.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a coke oven lid.

[0002]

2. Description of the Related Art On both sides of each carbonization chamber of a coke oven,
There is a kiln for pushing out coke after carbonization,
A furnace lid for closing this is attached so that it can be opened and closed.

This furnace lid is required to completely shut off the inside of the furnace from the outside air as one of its major functions. That is, maintaining a constant pressure in the furnace and preventing leakage of carbonization gas are conditions for performing carbonization satisfactorily,
It is also necessary to prevent the generated tar from spouting outside the furnace. For this reason, the furnace lid is equipped with a sealing mechanism to shut off the inside and outside of the furnace to prevent the dry distillation gas and tar from leaking out.

Japanese Utility Model Publication No. 1-2749 and Japanese Utility Model Publication No. 6
FIG. 5 shows an outline of a furnace lid sealing mechanism that has been conventionally used as disclosed in Japanese Patent No. 25342. In FIG. 5, the knife edge 6 integrated with the seal plate 5 is attached to the furnace lid, and the tip of the knife edge 6 is pressed against the sheet surface of the furnace frame 7 provided on the outer periphery of the coke oven kiln opening. Then, while increasing the pressure contact force to increase the gas seal pressure,
In order to uniformly transmit the knife edge linear pressure that presses the knife edge 6 to the furnace frame 7, to the sheet surface of the furnace frame 7, a pressure welding device 3 that presses the knife edge 6 toward the sheet surface of the furnace frame 7 is provided on the furnace lid. The linear pressure means that the knife edge 6 is the furnace frame 7
It is the load per unit length transmitted to.

The press contact device 3 has a structure in which a pressing means such as a press contact spring 10 for pressing the knife edge 6 toward the seat surface of the furnace frame 7 is built in. Since the pressing means is directly connected to the knife edge 6, the pressing device 3 is arranged so as to be fastened to the flat surface of the furnace lid main body 1 with a bolt so as to transmit the pressing force to the knife edge 6.

As shown in FIG. 4, a flattening leveler (not shown) is inserted in the extrusion-side furnace lid body 1 to make the height level of the coal charged in the coke oven carbonization chamber uniform. A mouth 2 is provided. The leveling port 2 is made of metal and is installed in the center of the upper part of the furnace lid body.

[0007]

However, since the leveling port 2 is located at the high temperature portion of the carbonization chamber, heat is directly transmitted from the high temperature gas in the furnace, and the inside of the leveling port 2 is about 500 ° C to 600 ° C.
℃. As the temperature of the leveling port 2 rises in this way, the pressure welding device 3 that is tightly fastened to the furnace lid main body 1 near the leveling port 2 is removed from the leveling port 2 by heat conduction from the leveling port 2. It is exposed to a higher temperature than the other distant pressure welding device 3. The pressure contact spring 10 in the pressure contact device 3 near the leveling port 2 is affected by this temperature and becomes higher in temperature than the pressure contact springs 10 in the other pressure contact devices 3 distant from the leveling port 2 and the strength of the spring decreases early. Therefore, the pressure contact force for pressing the knife edge 6 against the furnace frame 7 decreases, and it becomes impossible to keep the linear pressure uniform. Forcibly, the gas in the furnace leaks from the knife edge 6 and the seat surface of the furnace frame 7 located immediately below the pressure welding device 3 near the leveling port 2.

As described above, with the furnace lid on the extrusion side of the current coke oven, it is difficult to maintain the pressure contact force of the pressure contact spring 10 in the vicinity of the leveling port 2 stably for a long period of time because of the high temperature. Therefore, the present invention reduces the temperature transmitted from the leveling port 2 to the pressure welding device 3 so that the pressure welding spring 10
It is an object of the present invention to provide a furnace lid capable of suppressing the decrease in strength, suppressing the pressure contact force of the knife edge 6 pressing the furnace frame 7, and maintaining a uniform linear pressure.

[0009]

SUMMARY OF THE INVENTION The present invention is provided with a knife edge provided so as to surround the periphery of a furnace lid, a seal plate provided inside the knife edge and fixed to the furnace lid, and provided on the outer periphery of a coke oven kiln opening. In a furnace lid of a coke oven having a pressure welding device that presses the knife edge against the furnace frame, a concave groove is provided in the mounting seat of the pressure welding device near the leveling opening provided in the upper part of the furnace lid, and the pressure welding device is bolted to the mounting seat. The above problems have been solved by concluding them.

[0010]

In the furnace lid structure of the present invention, the heat transfer area between the mounting seat and the pressure welding device is reduced by making the pressure welding device mounting seat near the furnace lid leveling opening on the extrusion side a concave groove, thereby reducing the temperature inside the furnace. Is reduced and the air flows into the concave groove to increase the surface area of contact between the pressure contact device and the air, thereby improving the cooling effect by natural ventilation cooling. Further, since the temperature of the pressure contact spring is lowered, the strength of the spring can be prevented from being lowered, and the knife edge linear pressure for pressing the furnace frame can be stably and uniformly ensured for a long period of time.

[0011]

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 2 is an elevation view of the oven lid on the extrusion side of the coke oven of the present invention. The leveling port 2 is installed on the upper part of the furnace lid,
The pressure welding devices 3 are evenly distributed on the entire circumference of the furnace lid main body 1
Bolts are fastened to the furnace lid body 1. The weight of the furnace lid is supported by the uppermost furnace lid support metal 9, and the pressure balance is received by the coal filling pressure in the coke oven, the gas pressure, and the reaction force of the pressure welding device 3 by the barbs 8 located at the upper and lower portions. The structure is such that when the furnace lid is attached or detached, a bar spring (not shown) is contracted and the bar 8 is swung to attach or detach.

FIG. 1 is an enlarged view of the vicinity of the leveling port 2 of FIG. 2, and FIG. 3 is a partially enlarged view of FIG. 1 taken along the line AA.
The pressure welding device 3 in the vicinity of the leveling port 2 is provided with a concave groove 4 in the mounting seat of the furnace lid body 1 and is bolted with the packing sandwiched.
Air flows into the concave groove 4 to increase the area of contact between the press contact device 3 and the air, so that the temperature rise of the press contact device 3 can be prevented. By adopting this structure,
The contact area between the furnace lid body 1 and the pressure welding device 3 near the leveling port 2 was reduced, and the temperature transmitted to the pressure welding device 3 could be suppressed. Further, since the pressure contact device 3 can be maintained at a low temperature, the strength of the pressure contact spring 10 is less likely to decrease, and the linear pressure can be uniformly ensured without reducing the pressure contact force. Further, since the strength of the pressure contact spring 10 is less likely to decrease, the life of the pressure contact spring 10 is extended, and the frequency of replacement work can be reduced, resulting in cost reduction.

[0014]

EFFECTS OF THE INVENTION The oven lid on the extrusion side of the coke oven of the present invention reduces the contact area between the oven lid main body and the pressure welding device in the vicinity of the leveling port, and the air is introduced into the concave groove provided in the mounting seat. By increasing the area in which the pressure contact device comes into contact with the air, the temperature rise of the pressure contact device near the leveling port can be prevented and the strength decrease of the pressure contact spring can be suppressed. Therefore, it is possible to maintain the knife edge linear pressure uniform for a long period of time without reducing the pressure contact force of the knife edge transmitted to the furnace frame, and the amount of gas leaked from the furnace frame and the knife edge is smaller than that of the conventional furnace lid. Lower and improve work environment measures.
In addition, the life of the pressure contact spring is extended, the frequency of replacement work can be reduced, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is an enlarged view of the vicinity of a leveling opening of a furnace lid of the present invention.

FIG. 2 is an elevational view of a furnace lid of the present invention.

FIG. 3 is a partially enlarged view of FIG. 1 taken along the line AA.

FIG. 4 is a conventional furnace lid.

FIG. 5 is a conventional pressure welding device structure for a furnace lid.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Furnace lid main body 2 ... Leveling port 3 ... Pressure welding device 4 ... Recessed groove 5 ... Seal plate 6 ... Knife edge 7 ... Furnace frame 8 ... Barber 9 ... Furnace lid support metal 10 ... Pressing spring

Continuation of the front page (72) Inventor Yama ▲ Saki ▼ Masao Ima No.7-14, Sachimachi, Tobata-ku, Kitakyushu City

Claims (1)

[Claims] 1. A knife edge provided so as to surround the periphery of the furnace lid, a seal plate provided inside the knife edge and fixed to the furnace lid, and the knife edge is pressed against a furnace frame provided on the outer periphery of the coke oven furnace opening. In a furnace lid of a coke oven having a pressure welding device, a coke characterized in that a concave groove is provided in a mounting seat of the pressure welding device in the vicinity of a leveling port provided in an upper portion of the furnace lid, and the pressure welding device is bolted to the mounting seat. Furnace lid.