JPS6038152Y2 - continuous furnace - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a continuous furnace such as a heating furnace or a heat treatment furnace for steel materials, and specifically relates to a sealing mechanism at an entrance/exit portion.

In manufacturing steel materials, a heating furnace is used for processing in a heat treatment furnace, and the doors of the charging port and the extraction port are opened and closed when the steel material is charged into the furnace and extracted from the furnace.

At this time, from the viewpoint of energy conservation, it is required to prevent outside air from flowing into the furnace as much as possible.

In particular, in walking beam type heating furnaces and heat treatment furnaces,
Since this is a method in which steel is charged into or extracted from the furnace by moving a moving beam loaded with steel in a fixed cycle such as rectangular or circular, the movement of the moving beam in the vertical direction is Since the door must be opened wide, it is easier for outside air to flow into the furnace.

However, conventional sealing mechanisms to prevent outside air from flowing into the furnace have involved hanging curtains made of heat-resistant materials such as asbestos or ceramic fibers over the charging and extraction ports, or minimizing the area of the openings. Measures have been adopted to

However, the above-mentioned means cannot sufficiently prevent outside air from flowing into the furnace, and the energy saving effect is small.

The present invention has been made in view of the above circumstances, and aims to provide a continuous furnace that can effectively prevent outside air from flowing into the furnace.

Hereinafter, an embodiment in which the present invention is applied to a walking beam heating furnace will be described with reference to FIGS. 1a and 2b and 2a and 2b.

In FIGS. 1A and 1B, 1 is the hearth of a walking beam heating furnace, 2 is the furnace wall of the charging port, and the charging port is provided with a door 3 that moves up and down along the furnace wall 2.

Further, numeral 4 in the figure is a moving beam that moves in a rectangular orbit.

Two support rods 5 are rotatably attached to the group 3.

A shaft 6 is rotatably attached to the tips of these two support rods 5, and a roller 7 made of ceramic fiber is disposed around this shaft 6, forming a sealing mechanism.

This sealing mechanism has the structure shown in FIGS. 2a and 2b.

That is, the roller 7 is a #300 board with a thickness of 50Trr11, which is made from ceramic fiber 1 fiber flux (trade name manufactured by Toshiba Monoflux Co., Ltd.) with colloidal silica and a small amount of agglomeration improver, and dried and hardened. (bulk density 0.35i'/c1K) is cut into a donut shape, and the center openings thereof are made to coincide with each other, and the discs are compressed and glued together as appropriate. The shaft 6 passes through contacting a part of 7a.

Moreover, the shaft 6 and the roller 7 are both ends of the roller 7,
It is fixed by pins 9, 9 passing through the disc 8.8 and the shaft 6.

Furthermore, bearings (not shown) are fitted into both ends of the shaft 6, into which the bent portion at the tip of the support rod 5 is inserted.

Next, the operation of the above-mentioned walking beam heating furnace when charging steel materials will be explained with reference to FIGS. 1a and 1b.

First, as shown in FIG. 1A, when the moving beam 4 is raised, the rollers 7 are pushed up by the steel members 10 on the moving beam 4 and also rise as the door 3 rises.

Next, as shown in Figure 1, when the movable beam 4 moves horizontally, the rollers 7 rotate freely due to friction with the steel materials 10, and do not interfere with the charging of the steel materials 10 into the furnace. .

Further, although not shown, when the moving beam 4 is lowered, the rollers 7 descend while remaining in contact with the steel materials 10 .

According to the above-mentioned walking beam type heating furnace, the roller 7 always moves the steel material 10 when charging the steel material 10.
Since it is in close contact with 0..., no unnecessary voids are created.

Therefore, there is less outside air flowing into the furnace,
The energy saving effect is extremely large.

Similarly, at the extraction port of the heating furnace, outside air rarely flows into the furnace.

It should be noted that the present invention is not limited to the walking beam type heating furnace as in the above-mentioned embodiments, but can be similarly applied to continuous furnaces such as a pusher set, a chain drive type heating furnace, and a heat treatment furnace.

Further, when the steel material does not move up and down, such as in a set of pushers, a roller may be provided independently of the door so that it rotates in contact with the steel material at a constant height.

Furthermore, since the roller comes into contact with the steel material, it needs to have an appropriate hardness, but to further harden it, the roller can be coated with an inorganic binder such as colloidal silica and impregnated with it.

As described in detail above, according to the present invention, it is possible to provide a continuous furnace that can effectively prevent outside air from entering the furnace and effectively save energy.

[Brief explanation of the drawing]

Figures 1a and b are cross-sectional views of essential parts of a walking beam heating furnace according to an embodiment of the present invention, and Figures 2a and b are partial cross-sectional views of a sealing mechanism of a walking beam heating furnace according to an embodiment of the present invention. FIG. 2 is a front view and a side view shown in FIG. 1... Hearth, 2... Hearth wall, 3...
...Door, 4...Moving beam, 5...Support rod, 6...Shaft, 7...Roller, 7a...Circle Board, 8...Disc, 9...
...Pin, 10... Steel material.

Claims (1)

[Scope of utility model registration request] A continuous furnace characterized by being equipped with a sealing mechanism consisting of a refractory roller rotatably mounted near a door at an entrance/exit section.