JPH04129561U - Diagnostic device for continuous casting equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent iron powder etc. added to a mold from falling into and getting caught in the detection head of a roll position measuring device, thereby preventing malfunction of the measuring device. [Configuration] The dummy bar 8 has a detection head 9 for equipment diagnosis.
2 is provided so as to be freely retractable, and a stopper 10 is provided at a rear position on the slab drawing direction line. The stopper 10 has a spring 11 inside thereof, and can freely move in and out of the dummy bar 8 surface. When the stopper 10 is not in the roll position, it protrudes from the surface of the dummy bar 8, catches iron powder, etc. falling from above, and prevents it from falling onto the detection head 92. The installation location of the stopper 10 on the drawing direction line of the dummy bar 8 is preferably set so that when the detection head 92 is in the roll position, the stopper is at a distance that is not in the roll position.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a diagnostic device for continuous casting equipment, for example, configuring a secondary cooling zone. Roll position measurement, etc. to measure the distance between rows of slab guide rolls facing each other. In some cases, the detection head used to measure the distance between rolls may become inoperable due to foreign matter such as iron powder being caught in the detection head. The present invention relates to a diagnostic device having means for preventing failure.

0002

[Conventional technology]

In continuous casting, as shown in Figure 5, molten steel 1 is transferred from a ladle 2 to a tandem Molten metal is poured into the mold 4 through the dish 3. At the beginning of pouring, at the bottom of the mold. A dummy bar head (not shown) is on standby, and during continuous casting, it gradually starts from the surface. The molten steel 1 in the mold 4, which is being cooled and solidified, is equipped with the dummy bar head. As the dummy bar 8 moves, it is pulled out downward and transported to the secondary cooling zone. Secondary cooling The belt usually consists of two groups of slab guide rolls facing each other, i.e., an upper group of rolls. 6a and a lower roll group 6b.

0003 The molten steel 1 led by the dummy bar 8 is finally discharged through 7 groups of pinch rollers. It will be done.

0004 In the above casting process, the operating process is adjusted so that the molten steel has a predetermined proper shape. At the appropriate time, measure the distance between the guide rolls 6a and 6b, and adjust the distance as necessary. These need to be corrected. An example of such a roll spacing measuring device is the Japanese Patent Application Laid-open No. 50 There is a device described in No.-14538.

[0005] This guide roll spacing measuring device is not suitable for dummy bars due to measurement frequency, operability, etc. installed. As shown in FIG. 6, the dummy bar 8 has a dummy bar head 81 and and a dummy bar link 82, and the installation position of the roll distance measuring device 9 is , usually at an appropriate position between the dummy bar links 82, 82. Also, Figure 7 shows that This shows an example of the structure of the measuring device 9, in which a holder is placed between the dummy bar links 82 and 82. is provided, and the displacement gauges 9, 9 are placed in this so as to face the rolls 6a, 6b facing each other. The detection head 92 is mounted with a spring 90 surrounding the detection end thereof. It is provided in a pressed state so that it always protrudes.

[0006] With this configuration, the detection head 9 is moved by the elastic force of the spring 90. 2 always protrudes from the surface of the dummy bar 8, but due to the movement of the dummy bar 8, the When the detection head 92 collides with the roll 6a and the roll 6b, the detection head 92 collides with the roll 6a and the roll 6b. are pressed by the rolls 6a and 6b, and the detection ends of the displacement meters 91 and 91 are also pressed. pressure is applied, and the amount of displacement is detected. Based on the amount of displacement detected by a pair of displacement meters 9, 9 The roll spacing is measured.

[0007] The detection head 92 is pressed by a roll and sinks below the surface of the dummy bar 8. In this case, there is a gap between the sliding hole of the holder of the dummy bar 8 and the detection head 92. That will happen.

[0008]

[Problem that the idea aims to solve]

By the way, in continuous casting, molten powder is generally deposited on the top surface of molten steel at the start of casting. At the same time, iron powder is used as a coolant to solidify the molten steel before casting begins. It is scattered on the dummy bar head 81. Therefore, when starting to draw the cooled steel, and at the beginning of continuous casting, that is, when the dummy bar head 81 moves almost vertically. (range shown by arrow A in Figure 5), some of the iron powder and powder scraps are melted. There is a tendency for things that were not there to fall out as the dummy bar moves.

[0009] This fallen iron powder and powder scraps can be collected by measuring the distance between rolls as exemplified in the above publication. When the detection head 92 of the device is depressed by the roll, the holder of the dummy bar 8 the outer surface of the detection head 92. and the sliding hole of the holder, and the detection head 92 finally reaches the roll position. The detection head 92 remains submerged and does not protrude even after leaving the roll position. It becomes impossible to determine

0010 Therefore, the main purpose of the present invention is to provide continuous casting equipment with opposing guide roll groups. It is attached to a main body, such as a dummy bar, that moves in a passageway for drawing out slabs. Iron powder and powder in the detection head of diagnostic equipment for measuring the distance between rolled rolls, etc. It prevents malfunctions caused by dirt, etc., improves the operating rate of the equipment, and reduces maintenance man-hours. The object of the present invention is to provide a device that can reduce the amount of energy used.

[0011]

[Means to solve the problem]

The above problem is caused by the casting process consisting of rows of opposing guide rolls in continuous casting equipment. A main body that moves in the passage for pulling out the piece, and a guide roll provided for this main body. a measuring element for diagnosing the situation of the pull-out passage; In the diagnostic equipment, Disposed on the upstream side of the measuring element, it protrudes and retracts from the main body and receives foreign objects in the protruding state. This problem can be solved by having a stopper that can be used. In addition, the measuring head can be freely retracted from the main body, and the distance between the measuring head and the stopper is , if the spacing between adjacent rolls is different, the effect of preventing foreign matter from getting caught is high.

0012

[Effect]

As mentioned above, the detector in this type of diagnostic equipment is susceptible to foreign matter being trapped. There is a big risk. However, in the present invention, there is a A stopper is provided to catch foreign objects when they are in the protruding state. This prevents foreign objects from getting caught when the detection head is retracted, thereby ensuring that the Not only can equipment be diagnosed stably, but maintenance man-hours can be reduced. Ru.

[0013] In this case, when the detection head is retractable, the detection head cannot be detected at the position facing the roll. The protruding head retracts. In this case, foreign matter such as iron powder that has fallen onto the surface of the roll will It is easy for the sensor to slide along the surface of the sensor and get caught between the retracted detection head and the main body. Ma In addition, the distance between the centers of the detection head and the stopper is an integral multiple of the pitch between rolls. In this case, both the detection head and the stopper are in the roll position, and the roll The iron powder has retreated into the dummy bar due to the oppression caused by the iron powder, and the stopper's ability to capture iron powder is insufficient. It will not be performed to its fullest potential. Therefore, in the present invention, preferably, the above-mentioned center-to-center distance is By setting the position to a position that is not an integral multiple of the roll pitch, the iron powder capturing ability of the stopper can be improved. becomes apparent.

[0014]

【Example】

The present invention will be specifically explained below with reference to Examples. In the following examples, the present invention will be described. The moving body is a dummy bar, and the measuring head is a detection head that measures the roll interval. This is an example.

[0015] Figure 1 shows the relative position of the vicinity of the center of the dummy bar 8 and the guide roll 6a (or 6b). 2 is a schematic diagram showing the position of the roll position measuring device, and as mentioned above, the dummy bar 8 is equipped with a roll position measuring device. A detection head 92 is provided. The feature of the present invention is its relationship with the detection head 92. The main feature is that a stopper 10 is provided to prevent foreign matter from falling.

[0016] That is, as shown in the same figure and FIG. It is arranged behind the drawing head 92 in the slab drawing direction, and its shape is preferably plate-like. dummy bar 8 as shown in the figure. It is best to install it so that it slopes downward toward the outside. Also, the stopper 10 , has a spring 11 inside it like the detection head 92, and has a spring 11 on the surface of the dummy bar 8. However, it has a structure that allows it to appear and appear at will. In this way, iron powder etc. falling from above can be removed. Since the object can be slid down toward the outside of the dummy bar 8, it will not reach the detection head 92. can be prevented from falling.

[0017] In addition, a suitable installation location of the stopper 10 in the pulling direction of the dummy bar 8 When the detection head 92 is in the roll position, the stopper 10 is not in the roll position. The distance, preferably the distance to the detection head 92, is smaller than the spacing between adjacent rolls. It is best to set it so that it becomes smaller. In this way, the detection head 92 will sink just right. When the solder is in a state where it is easy for foreign objects to get caught, the above stopper maximizes its function. Demonstrate.

[0018] Next, the detection head 92 and the stopper 10 move due to the movement of the dummy bar 8. 3 and 4, as described above, the stopper 10 The preferred distance between the adjacent roll 6a or 6b (hereinafter, 6a is substituted by 6a) is Since the spacing is smaller than the spacing between the The head 92 is in the roll position 6a, and the spring 91 of the detection head 92 is in the roll position 6a. It is contracted by the pressure of a, and the detection head 92 is retracted. At this time, the stock Par 10 is not in the roll position and the spring 11 is in an unloaded state, so the dummy bar is - It is in a state that protrudes from the 8th surface, and as shown in the figure, iron powder etc. F falling from above is swept away. The iron powder, etc. is received by the topper 10, and the iron powder, etc. This can prevent the objects from settling and being bitten.

[0019] Next, the dummy bar 8 is transported forward from this position, and as shown in FIG. When the upper 10 reaches the roll position and is in the retracted state, the detection head 92 protrudes. This prevents the situation where F such as iron powder gets caught even if it falls. will be stopped.

[0020] In the above explanation, the location where the foreign object fall prevention stopper is installed on the pull-out direction is The distance from the output head was set to be smaller than the distance between adjacent rolls, but generally The present invention can be more effectively achieved if the position is not an integral multiple of the pitch. Wear. In other words, if the stopper is not at a position that is an integral multiple of the roll pitch, the detection When the head is in the roll position, there is always a stopper between any two rolls. This is because it will exist. According to the experimental results, the distance from the detection head is A position of about 1/5 to 4/5 of the roll pitch is most effective in preventing iron powder from getting caught. Delicious.

[0021] On the other hand, when measuring the roll interval, as disclosed in the example in Fig. 3 of the above publication, However, only one displacement meter is sufficient. Furthermore, rather than measuring the spacing between rolls, The device of the present invention can also be used to measure the position of example drols.

[0022] Next, the results of implementing the present invention and confirming its effects will be explained. In this example, the relative positions of the detection head and the stopper are set as shown in FIG. The distance was 150 mm, and the longest distance was 200 mm. In this confirmation test, We also removed the stopper and conducted a test without the stopper.

[0023] First, if there is a stopper, 3 months (200 casting starts) have passed. However, there was no jamming of the stopper and it worked well without any maintenance. on the other hand , If you do it without a stopper, it will last for 4 days (8 times after starting casting) instead of 1 week. ), detection head malfunctions occurred due to iron powder getting caught. and perform the recovery We continued the test without a stopper, but this time on the third day (starting casting 5 times) Detection head malfunction occurred due to iron powder getting caught in the head).

[0024] On the other hand, the present invention is not limited to the above-mentioned example of roll spacing measurement, but can include, for example, Measuring the roll angle using the detection head as a displacement meter, installed in the passageway for drawing slabs It can also be used for diagnosing the presence or absence and arrangement status of parts and equipment that have been installed. difference Furthermore, the detector may be optical rather than mechanical. Also, the optical field In some cases, the detection head does not necessarily need to protrude or retract from the main body.

[0025]

[Effect of the idea]

As described above, the present invention effectively prevents iron powder etc. from getting caught in the detection head. This allows stable diagnosis of equipment.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of an embodiment of the present invention.

FIG. 2 is a diagram showing the relative positions of a detection head and a stopper.

FIG. 3 is a diagram showing the positional relationship between a dummy bar and a roll.

FIG. 4 is a diagram showing another positional relationship between the dummy bar and the roll.

FIG. 5 is a schematic diagram of a continuous casting apparatus.

FIG. 6 is a diagram showing the structure of a dummy bar.

FIG. 7 is a diagram showing a cross-sectional structure of an example of a roll distance measuring device.

[Explanation of symbols]

1... Molten steel, 4... Mold, 6... Roller apron, 6a
... Upper guide roll, 6b... Lower guide roll, 7... Pinch roll, 8... Dummy bar, 9... Roll distance measuring device, 92... Detection head, 10... Stopper for preventing foreign matter from falling.

Claims (2)

[Scope of utility model registration request] 1. A main body that moves in a slab drawing passage constituted by opposing guide roll groups of continuous casting equipment; Diagnosis of continuous casting equipment, characterized in that the diagnostic device has a measuring element for diagnosing the condition of the drawing passage, further comprising a stopper disposed upstream of the measuring element, protruding and retracting from the main body, and catching foreign matter in a protruding state. Device. 2. A diagnostic device for continuous casting equipment according to claim 1, wherein the measuring element is freely retractable from the main body, and the interval between the measuring element and the stopper is made different from the interval between adjacent rolls.