JPH0445028Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a heating furnace, and particularly to the shape of the extraction side of a walking beam heating furnace.

(Prior art) When using an extraction roller or a combination of an extraction roller and an extractor as material extraction equipment for a walking beam heating furnace, the shape of the furnace on the extraction side is usually as shown in Figure 2. . In FIG. 2, 1 is a heating furnace, 2 is an extraction roller, and 3 is an extraction roller cart.

By the way, the material heated to a predetermined temperature in a heating furnace is rolled after extraction, but before rolling for each lot, the material heated in the same way (hereinafter referred to as "forming material") is first rolled. ) to test whether the required rolling can be performed.

(Problem to be solved by the invention) However, in the case of a heating furnace having the shape shown in Fig. 2, there is no place to install and heat the molding material in the furnace, so each lot is Although a molding material is charged at the beginning of the material and heated in the same way as other materials, the amount of processing in the heating furnace decreases by the amount of heating the molding material, which is extremely uneconomical.

Further, in the shape shown in FIG. 2, the length of the extraction roller 2 protruding into the heating furnace 1 is long, and since the extraction roller 2 is water-cooled, there is a drawback that heat loss is large.

The present invention aims to provide a heating furnace that can solve these problems.

(Means for Solving the Problems) The present invention provides a heating furnace having an extraction roller or an extraction equipment that combines an extraction roller and an extractor, by increasing the thickness of the furnace wall at the insertion portion of the extraction roller and extractor. In addition, the upper and lower walls of the furnace wall have a structure in which a step is provided in the material conveyance direction in the heating furnace, and a space for placing molding material is formed inside the furnace above the furnace wall. This is a heating furnace.

(Function) The heating furnace according to the present invention is a heating furnace having an extraction roller or an extraction equipment combining an extraction roller and an extractor, in which the thickness of the furnace wall at the insertion portion of the extraction roller and the extractor is increased, and The upper and lower walls of the furnace wall have a structure in which a step is provided in the direction of material conveyance in the heating furnace, and a space for placing molding material is formed inside the furnace above the furnace wall. The deciding material can be placed in the furnace.

(Example) The present invention will be described below based on an example shown in FIG.

In the drawing, reference numeral 3 denotes extraction roller carts, for example, four of which are arranged in the width direction of the furnace outside the extraction side of the heating furnace 1, and each of these extraction roller carts 3 has a plurality of extraction rollers rotatably supported at two points. , the tip thereof faces into the heating furnace 1. For example, four extractors 4 are arranged at a required interval between these extraction rollers.

That is, the extractor 4 runs on rails 5 laid on the top surface of the extraction roller truck 3 via wheels 6, and moves the rod of the hydraulic cylinder device 7 for forward and backward movement installed at the rear of the extraction roller truck 3 into and out. It is configured so that it can be moved back and forth with respect to the heating furnace 1 by movement. Also, this extractor 4
is pivotally supported at its rear end by a pin 8, and is configured to be able to swing vertically relative to the portion that supports the wheels 6 by moving the rod of a swinging hydraulic cylinder device 9 in and out. There is.

Accordingly, in the present invention, the shape of the extraction side end of the heating furnace having the above-mentioned extraction equipment is configured as follows.

That is, in the present invention, the thickness t of the furnace wall 10 at the insertion portion of the extraction roller and extractor 4 is made thicker than that of the conventional furnace wall, and the extraction roller and extractor 4 having a water-cooled structure are located in the furnace. The area is minimized to reduce heat loss.

In addition, the present invention has a structure in which the wall surfaces 11 and 12 located above and below the thickened furnace wall 10 are provided with steps at different positions in the material conveyance direction within the heating furnace 1, so that the upper wall surface 11 and the The molding material 13 can be placed in the space formed by the upper surface of the furnace wall 10 of the insertion section.

Although not shown, this molding material 13 is inserted into the heating furnace 1 through a door provided on the upper wall surface 11.

(Effects of the invention) As explained above, the heating furnace according to the invention has a heating furnace having an extraction roller or an extraction equipment in which an extraction roller and an extractor are combined. In addition to increasing the thickness, the upper and lower wall surfaces of the furnace wall portion are structured to have a step in the direction of material conveyance within the heating furnace,
A space for placing a molding material is formed inside the furnace above the furnace wall, and has the following effects.

Since the molding material can be placed on the furnace wall of the insertion section and heated, etc., the throughput in the heating furnace increases.

Since the thickness of the furnace wall at the insertion part is increased, the length of the extraction roller and extractor protruding into the furnace is shortened, thereby reducing heat loss.

When the size is changed during the rolling process or when rolling trouble occurs, the extraction roller and extractor are temporarily pulled out of the furnace, but in this example, the heat loss is small because the aperture has a long insulation length.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a cross-sectional view of an embodiment of the main part of a heating furnace according to the present invention, and FIG. 2 is a similar diagram of a conventional heating furnace. 1 is a heating furnace, 4 is an extractor, 10 is a furnace wall, 11 is an upper wall surface, 12 is a lower wall surface, and 13 is a molding material.

Claims (1)

[Scope of utility model registration request] In a heating furnace that has an extraction roller or an extraction equipment that combines an extraction roller and an extractor, the thickness of the furnace wall at the insertion portion of the extraction roller and extractor is increased, and the upper and lower wall surfaces of the furnace wall are made thicker in the heating furnace. 1. A heating furnace characterized by having a structure in which a step is provided in a material conveying direction, and a space for placing a molding material is formed inside the furnace above the furnace wall.