JPS639576Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a Matsufuru structure that is applied to a moving hearth type heat treatment furnace such as a rotating hearth type Matsufuru type continuous heat treatment furnace using a metal coil.

(Prior Art) A rotary hearth-type matzuffle type continuous heating furnace is generally placed on a rotating hearth of metal coils, these coils are covered with matzhules, and the coils are heat-treated by burners installed on the furnace wall. It has been known since ancient times.

In these furnaces, the coil moves along with the matsufuru in the circumferential direction at predetermined pitch intervals due to the movement of the hearth, but during this movement, the flames of the burners installed on the furnace wall directly collide with the matsufuru, resulting in long-term use. It is said that it damages Matsuful. (Utility Model Publication No. 58-32123) For this reason, in the above-mentioned device, the furnace wall burners are arranged in a staggered manner so as to alternately point between the matsuru when the rotary hearth is stopped, and the combustion amount is reduced or reduced when the hearth rotates. It is suggested to narrow it down to /10 or less.

However, fully closing or narrowing the combustion rate to protect the matsufuru is originally intended to prevent flames from hitting the matsufuru, so while it has some meaning, it also has the effect of reducing the amount of metal This means limiting the burner capacity and heat treatment capacity of the furnace, regardless of the reason for heat treatment of the coil.
Furthermore, once a large amount of combustion is restricted, such as by completely closing the burner, it takes a certain amount of time to restore a steady state inside the furnace, which brings about the inherent rituals of heat treatment operation. Become. Furthermore, the burner combustion control system itself needs to be compatible with this.

(Purpose of the invention) The present invention improves the Matsufuru itself so that it will not be damaged by flame collisions, and even when moving the hearth, considerations such as closing the burner or narrowing it to a wide width simply to protect the Matsufuru. This allows for stable operation without the need for

(Structure and operation of the invention) The invention will be specifically described below based on embodiments shown in the drawings.

FIG. 1 shows a cross section of a rotary hearth-type Matsufuru type continuous heat treatment furnace, in which a coil 1 is placed on a moving hearth 2 and covered with a Matsufuru 3. The furnace wall 4 has a burner 5 opening into the furnace, and the furnace is operated in the manner described above.

When the hearth moves, the pine-full surface with which the flame of the burner 5 collides has a predetermined width, and a shielding material 6 is attached to the minimum part of the predetermined length.

As mentioned above, the shielding material 6 is for shielding the matsufuru from direct flame for several seconds during movement of the hearth, so it may be the smallest portion that is exposed to the flame, such as a short band-like material. In practice, a steel plate is welded to the surface of the outer periphery of the Matsuful facing the burner position, or a baffle plate is installed at several points with a certain space between the outer periphery of the Matsuful and the iron plate in consideration of the deformation of the Matsuful. good.

Further, instead of such a shielding plate, ceramic may be coated to a predetermined thickness, and the thickness of the pine full plate may be made thicker in the portion exposed to the flame than in other portions. In a Matsufuru equipped with such a shielding plate, the shielding plate itself has a small area and the shielding is only for a few seconds, so the coil inside the Matsufuru is not affected by the temperature difference with other parts.

Also, since the Matsufuru is usually placed on or removed from the hearth using a mounting tool with a hanger attached to the hearth in a fixed position, the direction of the Matsufuru with respect to the hearth is always constant, so the above-mentioned shielding material is attached to the burner. There is no need to worry about the set-up, as it is always opposed to the front. Furthermore, if such a positional relationship cannot be obtained, these problems can be solved by mounting a shielding plate on the circumference of the pine full position corresponding to the burner height.

(Effects of the invention) Since the Matsufuru according to the invention is constructed as described above, it has the function of preventing damage caused by direct collision of the burner flame even when the hearth is moved.
Therefore, stable heat treatment operation can be performed without completely closing the combustion amount of the burner.

In explaining the present invention, we mainly used the example of a Matsufuru type continuous heat treatment furnace with a rotary hearth, but the hearth does not necessarily need to rotate; It can also be applied to other types of furnaces.

[Brief explanation of the drawing]

FIG. 1 shows a cross section of a moving hearth type Matsufuru type continuous heat treatment furnace using a Matsufuru according to the present invention. 1... Coil, 2... Mobile furnace body, 3... Matsufuru, 4... Furnace wall, 5... Burner, 6... Shielding material.

Claims (1)

[Scope of utility model registration request] Matsufuru for a moving hearth type heat treatment furnace, characterized in that a shielding material for shielding the direct flame of the burner is attached to the outer circumference of the Matsufuru where the burners provided on the furnace wall face when the hearth is moved.