JPS6235023Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement of a bell for batch annealing.

In a cold rolling factory, the cold rolled coil is removed from the surface of oil in a cleaning line and sent to an annealing furnace to adjust the crystal structure after cold rolling.

Typically, 15 to 50 tons of cold-rolled steel plate is up-ended in a coiled state, lifted by lifting magnets, and transported through the annealing factory.

In the batch type annealing furnace, the coils are stacked in 3 to 4 stages and covered with a cover and an annealing furnace (bell type).
Heating, soaking, and cooling are performed in a reducing gas atmosphere.

After cooling is completed, each coil is lifted up again using a lifting magnet and transported to the next process.

However, as shown in Fig. 1, a large number of batch-type annealing furnaces 1 are installed in the same yard, and the handling of the coils 2 is carried out by the riff-mag crane 3 as described above, but the coil conveyance path 4... A part of the combustion fuel gas piping 6 extending in a certain direction is located in line with the connection port 5 in the batch type annealing furnace 1, which is usually arranged one in a certain direction. Therefore, if a failure occurs in the riffmag 3, the coil 2 may fall onto the gas pipe 6.

If the coil 2 were to fall, it would damage the gas pipe 6 and fill the area with gas, creating a risk of poisoning, explosion, etc.

As the size of coils continues to increase, if a coil fall accident occurs and the gas pipe 6 is damaged, a serious disaster is expected to occur because the nearby base is being annealed.

In fact, with RIFMag, coil falling accidents occur about once every one to two years due to malfunctions, residual magnetism, disconnection of cab tire cords, etc. during coil handling.

In the figure, 7 indicates the combustion fuel gas main pipe, 8 indicates the base foundation surface, 9 indicates the floor, and 10 indicates the dangerous gas piping.

Measures against the above-mentioned disasters include using super magnets (permanent magnets) and making the floor 9 made of strong concrete to protect the gas pipe 6 from damage even if the coil 2 falls. but,
In either case, expensive equipment is required.

Therefore, as shown in FIG. 2, the gas piping 6 is placed only on the side opposite to the coil handling to completely protect the gas piping 6 from falling of the coil 2, and on the other hand, there are connection ports on both sides of the gas piping 6. 5
A method is adopted in which the batch type annealing furnace 1' located on one side is rotated within the factory in order to connect it to the gas pipe 6.

However, according to this, the power source, instrumentation equipment, and annealing furnace 1 necessary for rotating the batch type annealing furnace 1 are
The disadvantage is that the assembly of the guide posts for positioning is complicated.

This proposal was made in view of the above points, and its gist is that in batch-type annealing equipment in which the combustion fuel gas piping is installed on the coil handling side or the counter-coil handling side, The connection port is arranged so that the connection can be made from either the left or right position, and the structure allows combustion gas to be supplied from either the left or right position, eliminating the need for a particularly complicated structure.

Details of this will be explained below based on the drawings.

That is, in the case of the batch type annealing furnace 1 of the present invention, as shown in FIG.
0 is provided with connection ports 11 and 11' made of hoses and connection fittings on both the left and right sides so that connection can be made from either the left or right position.

For this reason, it is possible to receive gas supply from either the left or right side, and in order to protect the gas pipe 6, it is placed on the side opposite to the coil handling side, so depending on the annealing furnace, the gas pipe If the gas pipe 6 is extended to the left side as shown in the figure, the connection port 11 on the side facing it can be used. It is sufficient to connect to the piping 10 and receive gas supply.

In addition, 12 in the figure is when removing the furnace after soaking is completed.
A nitrogen gas purge outlet for purging nitrogen gas in the pipe 10 is shown.

In addition, 13 in the figure shows a bell guide post, and 14 shows a gas pipe for a pilot burner.

[Brief explanation of the drawing]

Figure 1 a, b is a plan view and front view of conventional fuel gas piping and coil handling, Figure 2 a, b
FIG. 3 is a plan view and a front view when fuel gas piping is installed on the side opposite to the coil handling side, and FIG. 3 is an overhead view of the batch-type annealing bell according to the present invention. 1... Batch type annealing furnace, 2... Coil, 3...
Rifmag type crane, 6... Fuel gas piping for combustion, 11, 11'... Connection port.

Claims (1)

[Scope of utility model registration request] In batch-type annealing equipment in which the combustion fuel gas piping is installed on the coil handling side or the counter-coil handling side, a connection port is provided so that it can be connected from either the left or right position, and combustion can be performed from either the left or right position. A bell-shaped furnace for batch-type annealing, characterized by having a structure capable of receiving a supply of gas for batch annealing.