KR20000018464U - Apparatus for cooling &protection of mold level gauge using radiation - Google Patents

Abstract

The present invention reduces the radiation exposure and prevents downtime due to the deterioration and failure of the radiation detector in the mold level gauge using the radiation to detect the height of the molten metal in the mold of the steelworks performance facility. A device for cooling and protecting a mold level gauge using radiation to extend it.

The present invention detects the radioisotope, which is transmitted through the detector, and converts it into an electrical signal. The value is transmitted to the main panel, the controller, and the measured value indicating device. Using the information, the controller automatically opens and closes the tundish nozzle to supply an appropriate amount of waste in the mold, wherein the radiation emitters 26a and 26b are provided with different lengths on the wall of the mold 4. And a pair of detector cooling units 40 disposed up and down at portions corresponding to the radiation emitters 26a and 26b and a radiation detector unit 30 embedded in the detector cooling unit 40.

Description

APPARATUS FOR COOLING & PROTECTION OF MOLD LEVEL GAUGE USING RADIATION}

The present invention reduces the radiation exposure and prolongs the life of the radioisotope in the mold level gauge using radiation to detect the height of the molten metal in the mold of the steel mill's performance equipment. It relates to a device for cooling and protecting a mold level gauge using radiation.

In general, the level of the molten metal flowing into the mold of the continuous casting facility (steel casting) of the steel mill is used to measure the level of radiation using the radioisotope permeation rate. This level meter is used for the level control of the molten metal in the mold of the mold. Recently developed, it is suitable for molds in which water surface flows, water vapor, dust and gas are high, and responsiveness and accuracy contribute to the improvement of slab quality.

1 is a state diagram of a conventional radiation mold level gauge, FIG. 2 is a sectional view showing a problem according to FIG. 1, and FIG. 3 is a perspective view showing a radiation detection apparatus in FIG.

4 is a perspective view illustrating the radiation detector in FIG. 1, wherein the radiation mold level gauge uses a phenomenon in which the amount of radioisotope is transmitted varies depending on the height of the molten metal 1 introduced into the mold 4. The detected radioisotope is detected by a detector and converted into an electrical signal, which is transmitted to a main panel 6, a controller 7, and a measured value indicating device 8 via a cable. Using the information, the controller 7 automatically opens and closes the tundish nozzle 5 to supply the appropriate amount of waste water 1 in the mold 4.

In the conventional molten metal level detector and the level detecting method, the playing mold 4 is a facility in which the molten molten material 1 is introduced into a solid state and is always heated even if the mold 4 is continuously cooled during operation. Water vapor, dust, and gas are present around the mold, and the entire mold 4 is a large weight product.

The radiation emitting device 10 and the radiation detector 20 are level gauges attached to one wall in the mold 4 in the above environment, and in particular, the radiation detector 20 has a PCB that is weak in heat to the detection sensor 21. The card 22 is configured to be out of the normal operation level state 50a when the performance decreases due to deterioration during operation, and the state overflows with water 50b, or the state incapable of continuous casting 50c due to the solidification of the water due to the level decrease. In this case, there is a problem that a large accident due to the leakage of water or a loss due to the shutdown of several hours.

In addition, since the fixing bolt 25 is firmly fixed to the mold 4, the fixing bolt 25 is fixed by dust, gas, water vapor, etc., and when the failure occurs, the radiation detector 20 takes a long time to replace or a mold that is a large weight object. (4) In some cases, it is necessary to pull out the whole by a crane, and in order to minimize the failure due to deterioration, it is installed at a distance 60a as far as possible from the molten metal 1, so that the radiation 12 is sufficiently transmitted through the thick mold 4 wall. There is a risk that workers will be exposed to the radioisotope by increasing the amount of radiation emitted, and the radiation emitting device 10 and the radiation detector 20 are installed in each mold 4 alone. It is narrow in mm and the corresponding model according to the failure of the radiation detection apparatus 10 and the radiation detector 20 is simple and unsafe only by emergency operation according to the experience of the operation driver.

In the figure, reference numeral 2 is a ladle, 3 is a tundish, 11 is a gate, 23 is a cable.

The present invention was devised to solve the above-described problems of the prior art, and prevents failure and deterioration of the radiation detection unit, thereby improving detection performance along with life extension, and easily removing and replacing the radiation detection unit, thereby improving productivity. It is an object of the present invention to provide a cooling and protection device for a mold level gauge using radiation, which can increase a worker's exposure to a radioisotope while increasing the lifetime of the radioisotope.

1 is a state diagram of a conventional radiation mold level gauge,

2 is a cross-sectional view showing a problem according to FIG.

3 is a perspective view showing a radiation detection apparatus in FIG.

4 is a perspective view illustrating the radiation detector in FIG. 1;

Figure 5 is a cross-sectional view of the installation state of the cooling and protection device of the mold level gauge using radiation according to the present invention,

6 is a plan view of FIG. 5;

7 is a perspective view showing a radiation emitter according to the present invention;

8 is a perspective view showing a radiation detection unit according to the present invention;

9 is a partial cutaway perspective view showing a detector cooling unit according to the present invention;

10 is a cross-sectional view of FIG. 9.

<Description of the code | symbol about the principal part of drawing>

1: metal 4: mold

5: tundish nozzle 6: main panel

7 controller 8 measured value indicating device

12: radiation 26a, 26b: radiation emitter

30: radiation detection unit 40: detector cooling unit

41: outer cylinder 42: inner cylinder

43: heat sink 48: partition plate

In order to achieve the above object, the radioisotope of which the amount of permeation varies according to the height of molten metal introduced into the mold is detected through a detector and converted into an electrical signal. A radiation emitter having a different length on the wall of the mold, wherein the controller automatically opens and closes the tundish nozzle using the processed information to supply an appropriate amount of waste in the mold. Provided is a device for cooling and protecting a mold level gauge using radiation, including a pair of detector cooling units respectively provided up and down at a portion corresponding to the emitter, and a radiation detection unit embedded in the detector cooling unit.

In the present invention, the detector cooling unit is a main body, the upper and lower one end of the inner and outer cylinders are installed with the elbow for entering the cooling water and connected to the pipe, the inner cylinder is built in the outer cylinder, a plurality of heat sinks attached to the inside of the outer cylinder And a buffer spring installed between the inner cylinder and the connector hole, a divider plate provided on both side surfaces of the inner cylinder, and a fixing flange assembled with the mold.

Hereinafter, the present invention will be described in more detail with reference to the drawings showing preferred embodiments.

5 to 10 show an embodiment of the cooling and protection device of the mold level gauge using radiation according to the present invention, the cooling and protection device of the mold level gauge according to this is largely divided into different lengths on the wall of the mold It comprises a radiation emitter installed with a pair, a pair of detector cooling units which are respectively installed up and down in a portion corresponding to the radiation emitter, and a radiation detection unit embedded inside the detector cooling unit.

As shown in Figs. 5 to 7, the radiation emitters 26a and 26b have different lengths on one side of the wall of the mold 4 and are embedded downward from the top at regular intervals.

As shown in FIGS. 5 and 6, the detector cooling unit 40 is fixed to the fixing bolts 25 at portions corresponding to the radiation emitters 26a and 26b, respectively. As shown, there is a fixing flange 44 in which bolt holes are processed so as to be assembled with the mold 4 at one side of the outer cylinder 41 constituting the main body, and the detector cooling unit 40 has a fixed bolt ( 25) and the fixing flange 44 is firmly fixed to one side of the mold (4).

Upper and lower ends of the outer cylinder 41 spaced apart from the fixed flange 44 by a predetermined distance are provided with elbows 47 for welding and entering the cooling water, respectively.

On the inner surface of the outer cylinder 41, a plurality of heat sinks 43 having a substantially triangular cross section are attached to the inner surface of the outer cylinder 41, and an inner cylinder 42 is provided therein.

One end of the outer cylinder 41 has a connector hole 46 is processed so that the connector pin 32 of the radiation detection unit 30 to be described later is assembled, the inner cylinder 42 and the connector hole 46 The buffer spring 45 is installed between the two sides of the inner cylinder 42, the partition plate to separate the cooling water and the outgoing cooling water between the outer cylinder 41 and the inner cylinder 42 to achieve a smooth circulation ( 48) are integrally installed.

As shown in FIGS. 5 to 6 and 8, the radiation detector 30 is embedded and assembled in the inner cylinder 42 of the detector cooling unit 40, as described in the related art. The sensor 31 and the PCB card 22 are built-in, and a connector 31 having a connector pin 32 protruding is assembled on one side thereof, and a cable 34 on the outer surface of the connector 31. The cable connector 33 is connected to the assembly.

The cable 34 is connected between the radiation detection unit 30 and the main panel 6 by a convenient cable connector 33, the main panel 6 and the data are measured value indicating device (8) and The controller 7 is distributed to the controller 7, and the controller 7 and the tundish nozzle 5 are connected by a control signal cable.

Reference numeral 70 in the drawings is a sealing for preventing the introduction of foreign substances.

Hereinafter, the operation of the present invention having the configuration as described above.

Cooling water drawn in through the pipe 49 and the elbow 47 flows between the outer cylinder 41 and the inner cylinder 42 from the inlet side to the outlet side by the partition plate 48 and constantly cools the temperature of the inner cylinder 42. In this case, the inner surface area of the outer cylinder 41 is widened by the heat sink 43, thereby increasing the cooling efficiency.

Meanwhile, the radiation detector 30 embedded in the detector cooling unit 40 detects the radiation emitted from the radiation emitters 26a and 26b and converts it into an electrical signal to the main panel 6 through the cable 34. Data is transmitted, and the main panel 6 distributes this signal to the controller 7 and the measured value indicating device 8, and the controller 7 moves the tundish nozzle 5 according to the comprehensive judgment. By controlling, the amount of waste water 1 introduced into the mold 4 is appropriately adjusted.

In this case, since the radiation emitters 26a and 26b and the radiation detectors 30 are provided in pairs, one of them can cope with an emergency in which one of them is broken, and the radiation emitters 26a and 26b differ in length from each other. Through the radiation detection unit 30 having an installation height, as shown in FIG. 5, the width of the normal operation level state 60b of the waste can be widened so that the operator can variously select the waste level state in the mold 4. Will be.

As described above, according to the present invention, the detector cooling unit surrounding the radiation detector unit significantly reduces the frequency of failure of the radiation detector unit, prevents deterioration thereof, improves detection performance along with life extension, and fixes it even when a failure occurs. Since the bolts can be loosened and the radiation detector can be quickly removed and replaced, there is an effect of reducing the troubleshooting time and increasing the productivity of the operation.

In addition, by adjusting (narrowing) the distance between the radiation emitter and the radiation detector through the radiation detector and the detector cooling unit, there is no need to increase the amount of radiation emitted, thereby reducing the risk of workers being exposed to the radioisotope. It has the effect of extending the life.

The technical idea of the cooling and protection device of the mold level gauge according to the present invention has been described above with the accompanying drawings, but this is illustrative of the preferred embodiments of the present invention and is not intended to limit the present invention.

In addition, it is obvious that any person skilled in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.

Claims (2)

The radioisotope is changed to an electrical signal by detecting the radioactive isotope, which changes according to the height of the waste water introduced into the mold, and transmits this value to the main panel, the controller, and the measured value indicating device, and uses the processed information. By the controller to automatically open and close the tundish nozzle to supply the appropriate amount of waste in the mold, Radiation emitters 26a and 26b installed on the walls of the mold 4 with different lengths; A pair of detector cooling units 40 installed at portions corresponding to the radiation emitters 26a and 26b, respectively; Cooling and protection device of a mold level gauge using radiation, characterized in that it comprises a radiation detector (30) embedded in the detector cooling unit (40). According to claim 1, wherein the detector cooling unit 40 is a main body and the upper and lower one end and the outer cylinder 41, respectively provided with elbows 47 for the cooling water is introduced and connected to the pipe 49, the outer cylinder 41 Inner cylinder 42 is built in the), a plurality of heat sink 43 attached to the inside of the outer cylinder 41, the buffer spring 45 provided between the inner cylinder 42 and the connector hole 46, and Cooling and protection device for a mold level gauge using radiation, characterized in that consisting of a partition plate (48) provided on both sides of the inner cylinder (42), and a fixed flange (44) assembled with the mold (4).