JPH0774371B2 - Heating furnace charging material positioning device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a heating furnace charging material positioning device.

(Prior Art) A conventional heating furnace charging material positioning apparatus determines a required transfer distance of a material based on the measured length of the material, as disclosed in, for example, JP-A-58-64312. The calculation is performed and the material transfer distance is measured to determine the material charging stop position.

(Problems to be Solved by the Invention) The above-mentioned conventional technique is a technique in a side-charge type heating furnace in which a material is charged into the furnace from a side surface of the heating furnace,
There are the following problems.

(1) Material length data is required.

(2) Therefore, a length measuring device is required.

(3) An allowable error is required for the length measurement, which results in a positioning error.

In addition to the above, in the side-charge type heating furnace, a roller table for material charging is indispensable in the furnace, and the length of the heating furnace becomes longer by that much, and there is also a loss of heat in the roller cooling water. There was a problem that the fuel consumption rate deteriorates.

The present invention provides a heating furnace charging material positioning device that advantageously solves the above problems.

(Means for Solving the Problems) According to the present invention, a roller table is provided in front of a charging port of a heating furnace, and one or more sets of sensors indicating a range where a material tip can be stopped are provided at the front part of the roller table, and the roller table. One or more sets of sensors that indicate the range where the material tail end can be stopped are installed in the rear part, and it has a control function to judge the material transport stop position based on the relationship between the tip detection timing and tail end detection timing of each sensor. This is a characteristic heating furnace charging material positioning device.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, this embodiment is applied to a positioning apparatus for a walking beam type heating furnace having a charging port on the front surface. In the figure, 1 is a walking beam type heating furnace, 1A is a charging port, and 2 is a fixed port. Skid, 3 is movable skid, 4
Indicates the material arrangement in the furnace. This arrangement shows the arrangement of the material lengths l _{1 to} l ₃ .

5 is a loading roller table, 6 is material being conveyed, S _{0 to} S ₆
Indicates a sensor for detecting the position of the end surface of the charging material.

Sensor S ₁ is installed at the maximum allowable overhang position for the material on the furnace wall side from the fixed skid 2A. Sensor S ₂
Is installed at the minimum allowable overhang position of the material from the fixed skid 2A to the furnace wall side. That is, the range between S _{1 and} S ₂ is the range where the tail end of the material can be stopped.

Sensor S ₃ is installed at the minimum allowable overhang position of material from the movable skid 3B. Sensor S ₄ is installed in the maximum permissible overhang position of material from the movable skid 3B. That is, the range between the sensors S _{3 to} S ₄ is within the range where the material tip can be stopped.

Similarly, between S _{5 and} S ₆ is the range where the material tip can be stopped. S ₀ is a sensor for switching from high speed conveyance of the material 6 being conveyed on the table to low speed conveyance for positioning.

First, a method of performing positioning with the positioning device having the above configuration will be described.

First, the material 6 conveyed at high speed is decelerated by the sensor S ₀ , and is decelerated to the positioning speed before traveling to S ₁ to continue traveling.

Passing the material tip a sensor S _3, if passed through the S ₁ material tail to until it reaches the S ₄ which is the material leading edge stopping Allowed range, immediately the running of the material is stopped, the material length l ₂ to l ₃ Positioning is completed.

If the material tail does not pass S ₁ , the material 6 continues to run at the positioning speed. Material tip passes S ₅ to S ₆
When the tail end of the material passes S ₁ before reaching, the traveling of the material is immediately stopped and the positioning of the material length l ₁ to l ₂ is completed.

By controlling as described above, positioning is performed at a predetermined position without the need for data of material length.

(Effects of the Invention) As described above, according to the present invention, it is possible to perform accurate positioning at a predetermined position without the need for length measurement data of a charging material, and a heating furnace provided with a charging port on the front surface. By applying it to a walking beam type wire rod heating furnace or the like, for example, it is possible to reduce the facility cost and fuel consumption rate.

[Brief description of drawings]

FIG. 1 is a plan view showing a positioning device of the present invention. 1: Heating furnace, 1A: Inlet 2,2A, 2B, 2C: Fixed skid 3,3A, 3B, 3C: Movable skid 4: Material arrangement in furnace, 5: Roller table 6: Material being conveyed S ₀ ~ S ₆ : Sensor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ryoji Yamahira 46-59 Nakahara, Tobata-ku, Kitakyushu City, Fukuoka Prefecture, Nippon Steel Plant Design Co., Ltd. (56) References JP-A 64-28321

Claims (1)

[Claims] 1. A roller table is provided in front of a charging port of a heating furnace, and one or more sets of sensors indicating a range in which a material tip can be stopped are provided in a front portion of the roller table, and a material tail end can be stopped in a rear portion of the roller table. A heating furnace charging material having one or more sets of sensors indicating a range and having a control function of determining a material transportation stop position based on the relationship between the tip detection timing and the tail detection timing of each sensor. Positioning device.