KR20010060887A - Fem peratare measurement method of narrou side in continuous casting mold - Google Patents

Abstract

PURPOSE: A method for measuring a temperature of the short side part of a continuous casting mold is provided to accurately and promptly sense a temperature of the mold, a casting temperature even in a small space, and solve problems such as defects in the subsequent process due to difficulties in effectively controlling the casting temperature. CONSTITUTION: In a continuous casting mold which comprises a long side mold (40-1) and a short side mold (40-2) which is adjusted depending on a size of the slab, and at the outer side of which a cooling zone (30) is equipped, the method for measuring a temperature of the short side part of a continuous casting mold comprises the process of measuring a temperature by fixing a closely adhered body (60) to the side surface of a cooling zone (30) so as to contact the anode thermocouple with one side of the measuring hole (41) and the cathode thermocouple with other side of the measuring hole (41), thereby constructing an indirect circuit, wherein the closely adhered body (60) is equipped with an elastic body protecting groove supporting and protecting an elastic body (70), the elastic body (70) is supported to a supporting rise of the elastic body protecting groove, the elastic body (70) is coiled around a thermocouple (50) at the lower side of a guide groove which guides the thermocouple (50) so that the thermocouple (50) is inserted into a measuring hole (41), and wherein the mold is equipped with the measuring hole (41).

Description

FEM PERATARE MEASUREMENT METHOD OF NARROU SIDE IN CONTINUOUS CASTING MOLD}

The present invention relates to the temperature measurement of a mold for continuous casting, and to a temperature measuring method for measuring the precise temperature of the mold by maintaining a thermocouple continuously in contact with the mold during casting.

In general, in the steelmaking process for manufacturing steel plates, rods, pipes, etc., steel is manufactured using a steelmaking furnace, and the manufactured steel is transferred to a continuous casting machine using a ladle, and continuous casting is performed using a tundish to produce slabs or billets. Done.

The slab manufactured by the above-described method is manufactured into a thin plate through a hot rolling process, a cold rolling process, and the like, and the billet is manufactured into a rod or a tube through a rolling or extrusion process.

The continuous casting process is a process for manufacturing slab or billet using molten steel manufactured in a steelmaking furnace as described above, receiving a molten steel from the ladle, and having a dip dish 30 having an immersion nozzle 30 for discharging molten steel at a lower side thereof. 10) with,

The immersion nozzle 20 is inserted into the inlet and the cooling jacket 30 is provided on the outside is composed of a mold (40) to solidify in the course of the molten steel is passed through the heat of the molten steel (40) As it exits into the cooling water through the copper plate, the molten steel in the mold undergoes a solidification process.

In the process of solidifying molten steel, the solidification temperature is an important factor, and the problem of cracking or breaking occurs in the subsequent process by the solidification temperature. The control of the solidification temperature is controlled as an important problem along with the control of the casting speed.

Therefore, it is necessary to control the solidification temperature, and in order to control the solidification temperature, it is necessary to accurately detect the solidification temperature, that is, the casting temperature.

The conventional method for detecting the casting temperature of molten steel is to measure the temperature by inserting the thermocouple 50 into the copper plate constituting the mold as shown in Figure 1 by installing the thermocouple 50 on the long and short sides of the mold The temperature was sensed. However, since the long side of the mold has a lot of space, it is easy to install a thermocouple. However, since the short side does not have enough space between the long side and the long side, the Sheath type K-Type thermocouple is fixed to the mold with a metal bond.

However, due to the deformation of the copper plate due to high temperature during casting, it is difficult to make continuous temperature measurement due to the problem that the thermocouple is not changed to the temperature measurement point or to make continuous contact. There was a problem.

Therefore, the technical problem to be achieved by the present invention is to solve the above problems and to provide a method for accurately and quickly detecting the temperature of the mold, that is, the casting temperature even in a small space.

1 is a schematic diagram of a continuous casting facility showing a conventional temperature measurement method

2 is a thermocouple fixing device of the present invention

Figure 3 is a cross-sectional view of the thermocouple fixing device assembly of the present invention

Figure 4 is a side cross-sectional view of the thermocouple fixing device of the present invention

5 is a mold temperature sensing graph according to the present invention

b is a mold temperature sensing graph according to the conventional method

[Description of Major Code in Drawing]

10 ... tundish 20 ... Immersion nozzle

30 ... cooling stand 40 ... mold

40-1 ... long side mold 40-2 ... long side mold

41 ... measuring hole 42 ... measuring hole

43 ... RTD 50 ... Thermocouple

51 ... + pole thermocouple 52 ...-pole thermocouple

53 ... elastic support jaw 60 ... body

61 ... guide groove 62 ... elastomer protective groove

63 ... bolt groove 64 ... bolt

70 ... elastomer

The configuration for achieving the above technical problem is composed of a long side mold and a short side mold that is assembled and adjusted by the size of the slab and the outer side guides the thermocouple to be inserted into the measuring hole provided in the mold in a continuous casting mold with a cooling stand Winding the thermocouple on the lower side of the guide groove and fixing the main body with the elastic body protection groove to protect the elastic body supported on the supporting jaw on the side of the cooling table. -It consists of temperature measurement method of short side of continuous casting mold which measures temperature by forming indirect circuit by contacting pole thermocouple.

When described in detail with reference to the drawings according to an embodiment as follows.

The guide groove 61 for guiding the lower side of the thermocouple is inserted into the measuring holes 41 and 42 provided in the mold 40 is provided, and the lower side of the guide groove is wound around the thermocouple 50 and protrudes at the interruption of the thermocouple. An elastic body protection groove 62 is provided to support and protect the elastic body 70 supported by the elastic support jaw 53 provided thereon, and both sides of the guide groove have a rectangular bolt hole fixed to the cooling table 30. 63) the main body 60 for close contact is bolted to the bolt hole provided on the cooling side to contact the thermocouple of the positive pole in one measuring hole 41 and the thermocouple of the negative pole in the other measuring hole 42. It consists of a method of measuring the temperature on the short side of a continuous casting mold that measures the temperature by constructing an indirect circuit.

When described by the following action.

When the temperature of the mold is measured by the temperature measuring method provided with the present invention, the guide body 61 provided in the main body 60 receives the guide and communicates with the lower side of the guide groove 61, and the elastic body protective groove ( 62. The thermocouple 50 having the elastic body 70 wound around the elastic support jaw 53 formed to protrude in the middle is inserted into the measuring hole 41 provided in the mold and protrudes in the middle of the thermocouple 50. The thermocouple 50 is forced to move downward by the elastic body 70 which is wound around the support jaw 53 and the elastic protective groove 62 and continuously pushes the thermocouple 50 downward by the restoring force of the elastic body. Received continuously to be in contact with the temperature measuring point 43 specified in the measuring hole 41 even in the deformation of the mold due to high temperature will be able to continuously measure the temperature of the accurate mold. In addition, the rectangular fixing bolt hole 63 provided in the main body 60 has a restoring force of the elastic body 70, that is, the elastic body 70 by using the clearance of the bolt hole 63 when the main body 60 is coupled to the cooling table 30. To adjust the degree of compression.

5 is a graph illustrating a result of temperature measurement according to an embodiment and a temperature measurement result according to the prior art. Graph 5a according to the present invention is continuously shown constantly, but 5b according to the prior art appears to be constant at an initial time, but for a predetermined time. After this time, it can be seen that high and low temperature coexist. Therefore, the prior art can be seen that the contact between the thermocouple and the measuring site is not continuous and the method of the present invention can be seen that the contact between the thermocouple and the measuring site is continuously contacted without being terminated.

The effect of the present invention is that the contact between the thermocouple and the measuring part in the mold is made continuously to accurately and quickly detect the temperature of the mold, that is, the casting speed to effectively control the casting speed to prevent defects caused by the casting temperature during casting It has an effect.

Claims (1)

It consists of a long side mold 40-1 and a short side mold 40-2 that is assembled and adjusted according to the size of the slab. Elastic protection for supporting and protecting the elastic body 70 which is wound around the thermocouple 50 under the guide groove 61 for guiding the thermocouple 50 to be inserted into the measurement hole 41 provided therein. The contact body 60 having the groove 62 is fixed to the side of the cooling stand 30 so that one measuring hole 41 is in contact with the positive pole and the other measuring hole 42 is in contact with the negative pole. To measure the temperature by constructing an indirect circuit.