JP2921457B2 - Method for detecting seal abnormality in sinter cooling machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting an abnormality in a seal device installed in a sinter cooling machine to prevent leakage of cooling gas and mixing of outside air, and more particularly to an exhaust hood and a cooler. The present invention relates to a method for electrically detecting damage to metal sealing means for sealing between a pan and between a ventilation duct and a cooler pan.

[0002]

2. Description of the Related Art As shown in FIG. 4, a sinter cooling machine is provided with a blower duct 3 below a cooler pan 1 running on a pan feed roller 2 and an exhaust hood 4 above.
The sintered ore 5 supplied from the ore feeding chute (not shown) onto the cooler pan 1 is cooled by the cooling gas sent from the air duct 3 while the cooler pan runs due to the rotation of the pan feed roller 2. , At the end of the cooler pan. On the other hand, the cooling gas is introduced into the exhaust heat recovery facility 7 through the exhaust hood 4 and is circulated and used as the cooling gas through the circulation fan 8.

[0003] In the sinter cooling equipment having such a configuration, the surface layer of the sinter on the cooler pan 1 is normally in a negative pressure state, and the outside air is sucked from the exhaust hood 4. In this negative pressure state, when the outside air is sucked from between the cooler pan 1 and the exhaust hood 4, the heat of the red hot sinter is taken away, and the high-temperature gas is cooled. Causes a decrease in On the other hand, the gas that has cooled the sinter is cooled and circulated through the exhaust heat recovery facility 7 as described above, and again cools the sinter 5 above from the ventilation duct 3. When the cooling gas flows into the sinter, the sintered ore 5 becomes a resistance to ventilation and leaks from between the blower duct 3 and the cooler pan 1. When this condition occurs, the cooling efficiency of the sintered ore deteriorates,
Deterioration of the quality of the sintered ore and burning of the conveyor belt conveyor for the product ore will occur. Further, the surrounding environment is polluted by dust contained in the cooling gas.

For this reason, conventionally, a sinter cooling machine is provided with a sealing device for preventing outside air from being sucked and leaked. FIG. 5 shows an example of the sealing device. The sealing device between the cooler pan 1 and the air duct 3 is a seal bar support projecting in the longitudinal direction at the upper opening of the air duct 3.
13 , a seal bar 10 having a slope and a receiving member 11 of the seal bar 10 horizontally attached to a tip end of the leaf spring 9, and the receiving member 11 of the cooler pan 1 is provided. A structure in which the front end slope of the seal bar 10 is slidably pressed against the receiving hardware 11 by the repulsive force of the leaf spring 9 and seals, and is arranged obliquely at the base of the feed roller receiver 12 projecting horizontally on the side surface. It has become. The material of the sealing leaf spring 9 is spring steel, and the material of the spring steel is about SUP5, which is general.

A sealing device between the cooler pan 1 and the exhaust hood 4 includes a leaf spring 15 attached to a seal bar support 14 projecting downward in the longitudinal direction on the side surface of the exhaust hood 4, It is composed of a seal bar 16 with a slope attached horizontally to the lower end thereof and a receiving member 17 of the seal bar. The receiving member 17 is disposed obliquely in the upper opening of the cooler pan, and is resiliently driven by the leaf spring 15. It has a structure in which it is slidably pressed against a wear bar 13 attached to the cooler pan 1 and sealed.

In the case of the sealing device having the above structure, a seal bar 1 for sealing between the cooler pan 1 and the air duct 3 is provided.
0, and the seal bar 16 that seals the space between the cooler pan 1 and the exhaust hood 4 resiliently slides by the repulsive force of the leaf springs 9 and 15, respectively. It can follow, and the sealing performance does not decrease. However, due to long-term operation, the seal bar or leaf spring may be damaged due to reduced flexibility due to thermal fatigue, etc., or wear due to repeated sliding, etc. To achieve and maintain the initial objectives. However, conventionally, there is no means for detecting breakage of the sealing device in order to cope with such a situation, and its development has been desired.

Although various types of air leak detecting means for a sealing device of a sintering machine have been proposed, none of them is effective for detecting breakage of the sealing device of a sinter cooling machine.

[0008] For example, a method of measuring a leak sound generated between a pallet and a wind box of a sintering machine and analyzing the leak sound to perform a leak diagnosis (see Japanese Patent Application Laid-Open No. 1-129932), the difference in oxygen concentration in the wind box To determine the leakage of the seal by measuring the
Referring 195929 JP), apparatus for detecting a poor sealing palette measured the wind leakage by leakage wind meter installed hood portion beneath the sintering machine pallet (real HirakiAkira 61-4
See JP 9298), established a small pressure gauge between the sintering machine pallet and the window box, reference method (JP-60-4 8 484 JP detecting the Mokaze seal at a pressure change), the sintering machine A method of providing a detection tube between a pallet and a wind box and detecting leakage by ultrasonic waves
6-105436).

However, when the method of (1) is applied to the detection of breakage of a sealing device of a sinter cooling machine, it is difficult to quantitatively determine the relationship between the leakage state and the breakage of the sealing device. Also,
In this method, a measuring instrument such as a pressure gauge, an acoustic measuring instrument, and an arithmetic unit must be installed in each seal between the cooler pan and the air duct and between the exhaust hood and the cooler pan, and the length is 100 m. The installation of such a measuring device in a sinter cooling machine as described above not only complicates the equipment, but also increases the equipment cost and the maintenance and inspection cost. In addition, since the method also requires an oxygen analyzer for each pallet, if this method is applied to a sinter cooler, the oxygen analyzer must be installed in all cooler pans.
Further, when measuring oxygen in all cooler pans with one oxygen analyzer, signal processing is required for the number of cooler pans, so that there is a problem that the calculation time is enormous. This device is difficult to detect air leakage unless the sintering machine pallet and wind box can be completely closed, and therefore cannot be applied to the detection of breakage of the sealing device of the sinter cooling machine.
When applying the above method to the detection of breakage of the sealing device of a sinter cooling machine, not only a micro pressure gauge is required for each cooler pan, but also a Then, it is difficult to detect the breakage of the sealing device. In addition, since the above method also requires a detection tube (measuring device) for each sintering machine pallet, a detection tube is required for each cooler pan when applied to the detection of breakage of the sealing device of a sinter cooling machine. , Measurement takes time,
Equipment costs are also high. Further, as a problem common to all of the above methods (1) to (4), the surroundings of the sinter cooling machine are hot and humid,
There is a drawback that various measuring instruments are liable to break down due to the bad dust environment, and any of these methods is difficult to apply to the detection of breakage of the sealing device of the sinter cooling machine.

[0010]

SUMMARY OF THE INVENTION In view of the above-mentioned current situation, the present invention quickly and accurately damages a seal bar or a leaf spring of a sealing device of a sinter cooling machine by relatively simple means. An object of the present invention is to propose a method for detecting a seal abnormality that can be detected.

[0011]

According to the present invention, there is provided a method for detecting a seal abnormality in a sinter cooler, wherein a cooler pan is suspended and supported by a feed roller, and a blower duct is provided below the cooler pan and an exhaust hood is provided above the cooler pan. In a sealing device of a sinter cooling device having a structure in which the cooler pan and the blower duct of the respectively disposed sinter cooling device and the exhaust hood and the cooler pan are each sealed with a metal sealing material, A heat-resistant cable is stretched in the longitudinal direction of the cooler pan on the outer surface of the metal sealing material, and connection terminals are provided at a plurality of locations on the cable to electrically disconnect the heat-resistant cable itself or disconnect the connection terminal. By detecting, the damage of the metal sealing material is detected.

That is, according to the present invention, as means for detecting breakage of a seal bar or a leaf spring of a sealing device, a single cable stretched over a metal sealing material is energized to disconnect the cable or disconnect the connection terminal. This is a method of detecting the departure using an indicator lamp or an alarm. Here, the cable may be a single unit, but in order to facilitate replacement, a plurality of cables are connected using connection terminals. As a method for attaching the heat-resistant cable, for example, a method is used in which a bracket is attached to an outer surface of a sealing material such as a leaf spring at an appropriate interval, and the bracket is hooked and stretched to obtain a desired tension. Can be used. The means for electrically detecting disconnection of the heat-resistant cable itself or detachment of the connection terminal automatically turns on or blinks an indicator lamp or activates an alarm such as a buzzer when such a trouble occurs. The electric circuit may be configured to perform In addition, the said indicator lamp, an alarm, etc. can be provided in the sinter cooling machine operation room.

[0013]

FIG. 1 is a longitudinal sectional front view showing a sealing device on one side of a sinter cooling machine to which the present invention is applied.
FIG. 3 is a side view partially showing a sealing portion between a cooler pan and a blower duct of the sealing device, and FIG. 3 is a schematic view partially showing the whole device configuration for carrying out the method of the present invention; Is a heat-resistant cable, 21 is a connection terminal, 22 is a bracket, 23 is an alarm, and 24 is a sealing cloth.

The heat-resistant cable 20 is formed by connecting a plurality of heat-resistant cables having appropriate lengths through connection terminals 21 to form a single cable. The bracket 22 for mounting the heat-resistant cable 20 has a locking portion 22-1 formed by bending a lower end portion into a U-shape, and is provided on the outer surface of each of the leaf springs 9 and 15 serving as a sealing material in the cooler pan longitudinal direction. Are mounted at appropriate intervals. At this time, the heat-resistant cable 20 is hooked and attached to the locking portion 22-1 of the bracket 22, and has an appropriate tension so that the wire is disconnected or the connection terminal 21 is detached when the seal bar or the leaf spring is damaged. .

The heat-resistant cable 20 attached to the leaf springs 9 and 15 of each sealing device between the cooler pan and the air duct and between the exhaust hood and the cooler pan in the sinter cooling machine is provided by the sinter cooling device. Alarm 2 installed in machine operation room
3 and is energized during the operation of the sinter cooler, and the circuit is configured so that the alarm 23 automatically operates when a disconnection or disconnection of the connection terminal 21 occurs during the operation. ing.

The portion of the seal cloth 24 attached to the joint of the sealing device bends the heat-resistant cable 20 by a predetermined amount so that the cable connection portion does not come off in the case of a very small damage.

In the above apparatus, the seal bar or the leaf spring may lose its flexibility due to thermal fatigue or the like due to long-term operation of the sinter cooling machine, wear due to repeated sliding, or meandering.
The leaf spring 9,
When the heat-resistant cable 20 attached to the cable 15 is disconnected or the connection terminal 21 comes off, the alarm 2
3 operates. Thus, it is possible to quickly know that the seal device of the sinter cooler has been damaged.

A heat-resistant cable that has been broken due to breakage of a seal bar or a leaf spring can be easily restored by replacing only the cable in the relevant portion and connecting to a normal cable.

[0019]

As described above, the seal abnormality detecting method according to the present invention has the following effects. (1) Since it can be implemented only by forming an electric circuit by stretching a heat-resistant cable with a simple member such as a bracket on the outer surface of a sealing material such as a leaf spring, sintering having a length of 100 m or more is possible. It can easily accommodate ore coolers and does not require high equipment costs. (2) Sufficient and accurate response can be made even in a bad environment of high temperature, high humidity and dust. (3) Since the breakage of the seal bar and the leaf spring can be electrically detected by disconnection of the cable or detachment of the cable connection terminal, it is possible to easily and accurately check the seal device for damage. (4) The structure is simple, and it has remarkable durability as compared with the conventional detection method using various measuring instruments, and the maintenance cost is significantly reduced. (5) Not only is the cost of the detection device inexpensive, but it can be easily installed in the existing sinter cooling machine. (6) Maintenance and maintenance of the detection device are easy.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing a sealing device on one side of a sinter cooling machine to which the method of the present invention is applied.

FIG. 2 is a side view showing a sealing device between the cooler pan and the air duct of the sealing device, partially omitted.

FIG. 3 is a schematic view showing a partially omitted overall device configuration for carrying out the method of the present invention.

FIG. 4 is a schematic view showing an example of the entire structure of a sinter cooling machine to which the present invention is applied.

FIG. 5 is a schematic view showing an example of a sealing device of the sinter cooling machine according to the first embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cooler pan 2 Pan feed roller 3 Blow duct 4 Exhaust hood 5 Sinter ore 9, 15 Sealing leaf spring 10, 16 Seal bar 11, 17 Metal fittings 20 Heat resistant cable 21 Connection terminal 22 Bracket 23 Alarm device 24 Seal cloth

────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Yukihisa Kurayama 3 Kazushima, Kashima-shi, Ibaraki Sumitomo Metal Industries, Ltd. Kashima Works (58) Field surveyed (Int. Cl. ⁶ , DB name) F27B 21 / 14

Claims (1)

(57) [Claims] 1. A cooler pan is suspended and supported by a feed roller, a blower duct is provided below the cooler pan, and an exhaust hood is provided above the cooler pan. In a sealing device for a sinter cooler having a structure in which a gap between a hood and a cooler pan is sealed with a metal seal material, a heat-resistant cable is stretched in a longitudinal direction of the cooler pan on an outer surface of the metal seal material. The cable is provided with connection terminals at a plurality of locations thereof, and damage to the metal sealing material is detected by electrically detecting disconnection of the heat-resistant cable itself or detachment of the connection terminals. A method for detecting seal abnormalities in condensate cooling machines.