JPH04276030A - Grate bar falling-out detector in sintering machine - Google Patents

Abstract

PURPOSE:To automatically detect the falling-out of a little number of grate bars at high accuracy. CONSTITUTION:A level meter 10 faced to the grate face in a pallet 1 at the turning-over pat 8 of the pallet in an ore supplying side and disposed movably to right and left directions in a pallet transverse direction, transmits measured distance signal in the grate face direction and shifting distance signal in the pallet transverse direction to a computing element 13. In the case the distance in the grate face direction becomes infinite or is remarkably increased larger than the setting distance and this condition becomes larger than the width of grate bar width (e.g. 35mm), the computing element 13 transmits alarming signal to an alarming unit 14. The alarming unit 14 generates alarming sound and the falling-out of the grate bar is informed to an operator. The detecting accuracy in the falling-out of grate bar is improved and further, the leakage quantity of blasting is reduced and the yield is improved.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grate bar falling-off detection device for a sintering machine.

0002

[Prior Art] As shown in FIG. 3, a pallet 1 of a sintering machine
The sintering material is placed on the bottom of the sintering bed 2.
A large number of grate bars 3 are installed which form a large number of slit-like openings through which air is sucked downward. This great bar falls off due to oxidative wear and breakage after long-term use. When the great bar falls off, a hole is made in the great bar mounting surface and the sintering raw material is sucked in, and a hole is made in the sintering bed (perforated portion 4) and air leaks, resulting in a decrease in the sintering yield. Such holes must be detected early and the place where the great bar has fallen off must be replenished with great bars.

[0003] The falling off of the great bar was discovered by a worker periodically drilling a hole in the sintering bed or inspecting the pallet reversing part on the ore feeding side to see if the great bar had fallen off. This method of inspection has a low detection rate because it does not involve constant monitoring, and workers are tied up for long periods of time.

[0004] Japanese Patent Publication No. 51-23245 is aimed at solving these problems. This is because the suction air volume is continuously measured with an air flow meter installed in one of the wind boxes of the sintering machine, and the average air volume is calculated. This is to detect the falling off of the great bar.

[0005]

[Problem to be solved by the invention] With the method of detecting airflow by installing an airflow meter in a wind box, since the average airflow is large, it is difficult to detect unless a large hole occurs, that is, a large number of great bars have fallen off. Moreover, when a hole is made in the wind box, there is a problem in that it is impossible to distinguish whether the hole is caused by the hole in the wind box or by the falling off of the great bar. SUMMARY OF THE INVENTION An object of the present invention is to provide a highly accurate great bar falling off detection device that can automatically detect falling off of a small number of great bars.

[0006]

[Means for Solving the Problems] The present invention aims to achieve the above-mentioned objects, and includes a level meter that measures the distance of the grate surface of the pallet in the reversing section on the ore feeding side by scanning in the width direction of the pallet. , a computation device that receives the measurement signal from the level meter and issues an alarm signal when the measured value exceeds the set value by a certain range, and an alarm device that receives the alarm signal from the computing device and emits an alarm sound. This is a great bar falling detection device.

[0007]

[Operation] When measuring the distance to the grate surface by scanning in the width direction of the pallet with a level meter, the distance value increases to infinity or significantly when the level meter comes to the normal opening of the grate or the place where the grate bar falls off. do. However, since the width of the great bar is 7 to 9 times the width of the great bar, it can be determined that the great bar has fallen off when the distance value continues to be infinite or increases significantly for more than the width of the great bar. .

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a reversing section on the feed side of a sintering machine in which the device of the present invention is installed, and FIG. 2 is a view taken along the line X--X in FIG. 1. The empty pallet 1 that has traveled on the return rail 5 engages with the teeth of the sprocket wheel 6 on the ore supply side, is lifted upward as the sprocket wheel 6 rotates, and is then reversed and transferred to the upper rail to be transferred to the sintering raw material charging section. I'm walking towards. A level meter 10 is installed opposite the grate surface 9 of the pallet 1 which is being lifted up by the pallet reversing part 8 on the ore feeding side. The two level meters 10 are provided so as to be able to run on running rails 11 provided along the width direction of the pallet 1 at positions where they do not interfere with the progress of the pallet 1 which is being reversed. The level meter 10 is connected to a chain (or wire) 12 that is pulled and driven in the left and right direction of the running rail 11.
The distance between the level meter 10 and the grate surface 9 is measured while moving in the left and right direction.

In the case of FIG. 2, two level meters 10, 10
However, if the pallet width is wide and it is difficult to measure the distance with two level meters, three level meters are installed and each It is sufficient to scan 1/3 of the width of the pallet. As the level meter, an ultrasonic level meter, a laser level meter, etc. are used.

The level meter 10 outputs a measured distance signal in the direction of the grate surface and a moving distance signal in the pallet width direction to a calculator 13.
Send to. The arithmetic unit 13 determines that the distance in the direction of the grate surface is infinite or significantly greater than the set distance (distance L from the level meter 10 to the surface of the grate bar in FIG. 2), and that this state corresponds to the width of the grate bar (for example 35 mm) or more, an alarm signal is sent to the alarm device 14. The alarm device 14 emits an alarm sound to notify people that the great bar has fallen off.

[0011] By implementing the present invention, the accuracy of detecting the falling off of the great bar has improved, and the number of times the great bar has been replenished has increased from the conventional 7 times/month to 15 times/month. Additionally, by making it possible to quickly replenish the areas where the great bar had fallen off, the amount of air leakage was reduced by 30Nm3/t.

0012

[Effects of the Invention] Since the present invention is configured as described above, the accuracy of detecting the falling off of the great bar is improved, the fallen place can be replenished quickly, the amount of air leakage is reduced, and the yield is improved. Effects can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a side view of a reversing section on the feed side of a sintering machine in which a device of the present invention is installed.

FIG. 2 is a view taken along the line XX in FIG. 1;

FIG. 3 is an explanatory diagram of holes in the sintering bed due to falling off of the great bar.

[Explanation of symbols]

1 Palette 8　Ore feeding side pallet reversal part 9 Great surface 10 Level meter 11 Traveling rail 12 Chain 13 Arithmetic unit 14 Alarm device

Claims (1)

[Claims] Claim 1: A level meter that scans and measures the distance of the grate surface of the pallet in the reversing section on the ore feeding side in the width direction of the pallet, and a level meter that receives the measurement signal of the level meter so that the measured value exceeds a set value within a certain width. This is a great bar fall detection device for a sintering machine, which consists of a computing unit that issues an alarm signal when the bar exceeds the limit, and an alarm that issues an alarm sound upon receiving the alarm signal from the computing unit.