JP2008200681A - Molten metal dripping detector, and molten metal dripping detection method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a molten metal dripping detector capable of surely detecting the dripping of a molten metal in casting equipment. <P>SOLUTION: For detecting the leakage of molten copper from the crack 9 of a cast wire rod 9 cast by a casting section 6, a leakage detector 7 for molten copper is installed at the width of 150 to 200 mm between the outlet port of the casting section 6 and the inlet port of a secondary cooling section 8, and also at the lower part of the cast wire rod 9. When the leakage of molten copper cuts a part of metallic bodies formed so as to be planar shape in the detector 7 at the lower part thereof, a measurement apparatus in a control section detects the cutting-off of current flowing through the metallic body and the reduction of voltage, and the control section directs an alarm apparatus to sound an alarm. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a detector and a molten metal dripping detection method for detecting molten metal dripping in a casting facility for casting molten metal.

In a casting facility for casting molten metal, in order to detect abnormal situations such as abnormal leakage of molten metal and abnormal dripping, a large number of sensors such as thermocouples are arranged, and for example, molten metal scatters and adheres to the thermocouple. There has been considered a method of detecting based on the disconnection caused by the above (paragraph 0002 of Patent Document 1).
JP 2001-269770 A

  However, as described in paragraph 0002 of Patent Document 1, detecting the abnormal state of the molten metal based on the disconnection caused by the molten metal scattering and adhering to the thermocouple is a thermocouple temperature sensor. It's not a natural use. In such a usage of the thermocouple, it is difficult to accurately detect the abnormality of the casting equipment because it is impossible to predict and install in which direction the molten metal is scattered. The inventor of the present invention has created the present invention by paying attention to the point of reliably detecting dripping of molten metal. An object of this invention is to provide the molten metal dripping detector which can detect the dripping of molten metal reliably.

  The molten metal dropping detector used in the metal wire casting apparatus according to the first aspect of the present invention includes an insulating frame having a plurality of engaging portions arranged opposite to each other, and an engaging engagement that is engaged with and engaged with the engaging portions. And a plurality of metal bodies fixed between the parts, wherein the plurality of metal bodies are configured to form a series of electric circuits.

  By providing the metal body which detects dripping of the molten metal concerning the apparatus by 1st invention so that it may be arrange | positioned under a molten metal, dripping of a molten metal can be detected reliably.

  In the molten metal dropping detector according to the second invention, the plurality of metal bodies are configured continuously.

  According to the second invention, since the metal body is formed continuously, even if the metal body is cut by dripping molten metal, it can be easily re-installed because all of the metal body is replaced at once.

  In the molten metal dropping detector according to the third invention, the plurality of metal bodies are linear or foil-shaped. According to the present invention, since the metal body having a special shape is not used, the cut portion can be easily replaced.

  In the molten metal dropping detector according to the fourth aspect of the present invention, the melting point of the metal constituting the metal body is equal to or lower than the melting point of the molten metal to be detected. According to this invention, since the melting point of the metal body is equal to or lower than the melting point of the molten metal, it is possible to reliably cut the metal body and detect abnormal leakage.

  In the molten metal dropping detector according to the fifth invention, the plurality of opposingly arranged locking portions are formed of an insulating member and the other of the pair of opposing locking portions is formed of a conductive member. It is characterized by being. According to the present invention, a series of electric circuits can be easily configured without giving a special shape to a plurality of metal bodies.

  According to a sixth aspect of the present invention, there is provided a molten metal drip detection method using a molten metal drip detector and a measuring device capable of detecting disconnection of the electric circuit by applying current or voltage to the electric circuit of the detector. The detector is arranged so that a part of the plurality of metal bodies is disconnected by dropping.

  ADVANTAGE OF THE INVENTION According to this invention, by arrange | positioning the metal body which detects dripping of a molten metal below a molten metal, dripping of a molten metal can be reliably detected with a simple apparatus.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, elements having the same or corresponding reference numerals in different drawings indicate the same or corresponding elements.

(Outline of the present invention)
FIG. 1 is a schematic view showing a configuration of a casting line for casting from molten copper 1 to casting wire 9. The molten copper 1 in the primary reservoir 2 accumulates in the secondary reservoir 3. An operator (not shown) adjusts the control valve 4 of the secondary reservoir 3 through the control unit 11 from the operation unit 10 and the amount of the molten copper 1 flowing into the trough 5 and the cooling water in the casting unit 6. A control valve (not shown) is adjusted to control the amount of cooling water.

  Then, the molten copper 1 is submerged 63 in this casting part 6 for primary cooling as shown in FIG. Then, the molten copper 1 is rolled by rotating the rolling roller 61 in a direction in which the molten copper 1 primarily cooled by the rolling belt 62 is sandwiched. The rolled cast wire 9 is further cooled by the secondary cooling unit 8. The speed for producing the cast wire 9 is about 5 to 6 m per minute.

  The casting wire 9 cast by the casting part 6 in FIG. 2 is based on the amount of molten copper 1 flowing in the cage 5 (FIG. 1) and the amount of cooling brine 63 for cooling the casting wire 9 in the casting part 6. The degree of coagulation is determined.

  FIG. 4 is a schematic view showing a cross section of the cast wire 9. For example, if there is a large amount of molten copper 1 flowing into the bowl 5 and a small amount of cooling water for cooling the cast wire 9, the liquid phase 92 (inside the solid phase 91 (700 to 800 ° C.)) ( (1000 ° C. or higher). In this case, when the crack 93 occurs in the solid phase 91, the molten copper 1 leaks from the crack 93.

  As shown in FIG. 2, in order to detect the leakage of the molten copper 1 from the crack 93 of the cast wire 9 cast by the casting part 6, the distance between the outlet of the casting part 6 and the inlet of the secondary cooling part 8 is 150 mm to 200 mm. By the way, the leak detector 7 of the molten copper 1 is installed below the cast wire 9. FIG. 3 is a view of this installation state as viewed from above.

When a leak of the molten copper 1 cuts a part of the metal body formed in a planar shape in the detector 7 below, a measuring device (not shown) in the control unit 11 of FIG. 1 flows into the metal body. The control unit 11 instructs the alarm device 12 to sound an alarm by detecting current interruption or voltage drop.

(Detector)
FIG. 5 is a schematic diagram illustrating an example of the detector 7. An insulating member 71 is formed as an outer frame of the detector 7, and locking members 73 are installed on the opposing insulating members 71 at intervals of about 10 mm in size of droplets leaking from the molten copper 1.

  The metal body 72 is formed of, for example, a wire material of copper (melting point: about 1000 ° C.) or aluminum (melting point: about 660 ° C.). This is because the temperature of the molten copper 1 is about 1000 ° C., and the melting point of the metal body 72 must be lower than this temperature. The copper or aluminum wire is passed through the hole of the locking member 73, and is formed into a planar shape so that a droplet leaking from the molten copper 1 can come into contact with the wire, and forms an electric circuit. Therefore, in view of the flexibility for passing a copper or aluminum wire through the hole of the locking member 73 and the wire breakage due to contact of a droplet leaked from the molten copper 1, the diameter of the wire is about 0.75 mm to 5 mm. Is preferred.

  The replacement of the metal body 72 when the metal body 72 is disconnected due to the contact of a drop leaked from the molten copper 1 is to pull out the metal body 72 after the disconnection from the insulating member 71 and attach the new metal body 72 to the locking member 73. This is done by passing through the hole. Further, without passing the new metal body 72 through the hole of the locking member 73, the cut end portion is slightly extended, and the extended end portion is entangled with the other end portion and electrically energized. You may do it.

  FIG. 6 is a schematic diagram illustrating another example of the detector 7. Conductive members 731 and insulating members 732 are alternately formed on the insulating member 71. When the insulating member 71 is opposed, the conductive member 731 and the insulating member 732 are formed to face each other. And the metal body 72 is connected in the edge part of the electrically-conductive member 731 on the opposing insulating member 71, and an electric circuit is formed.

  Further, the metal body 72 may be a plate or foil instead of a wire (for example, copper foil or aluminum foil). As described above, the size of the droplet leaking from the molten copper 1 is about 10 mm. For this reason, the gap between the metal bodies 72 that are plate-shaped or foil (the gap formed by the metal bodies 72 and 72) is preferably less than about 10 mm.

  FIG. 7 is a schematic diagram showing a replacement mechanism for the metal body 72 when the metal body 72 is disconnected. FIG. 7A shows a part of FIG. 6, and conductive protrusions 733 are provided at both ends of the conductive member 731. FIG. 7B shows a replacement metal wire 721, and holes 740 for insertion into the conductive protrusions 733 are provided at both ends of the metal wire 721. FIG. 7C shows a replacement metal plate (metal foil) 722, and holes 740 are provided at both ends as in FIG. 7B.

  After the disconnection of the metal body 72, the metal wire 721, which is a new metal body, and the holes 740 at both ends of the metal plate (metal foil 722) are inserted into the convex portion 733 of the conductive member 731 so as to straddle the opposing insulating member 71. Configure the electrical circuit. In addition, you may fix the metal wire 721 and the metal foil 722 with a nut, using the convex part 733 as a volt | bolt.

  The metal body 72 constituting the detector 7 has been described with reference to FIGS. 5 and 6. In order to improve the detection accuracy of the leakage of the molten copper 1, one metal circuit 72 may be formed with two layers of the metal body 72. In this case, the contact area may be increased by relatively shifting the upper layer and the lower layer so that the metal body 72 can be contacted by a droplet leaked from the molten copper 1.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the above meaning, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a schematic diagram which shows the structure of the casting line concerning embodiment of this invention. It is the schematic diagram which looked at the casting part, secondary cooling part, and detector concerning this Embodiment from the side. It is the schematic diagram which looked at the casting part, secondary cooling part, and detector concerning this Embodiment from the upper direction. It is a schematic diagram which shows the cross section of the cast wire concerning embodiment of this invention. It is a schematic diagram which shows the detector concerning embodiment of this invention. It is a schematic diagram which shows the detector concerning embodiment of this invention. It is a schematic diagram showing the replacement mechanism of a metal body when the metal body concerning embodiment of this invention is disconnected.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Molten copper 2 Primary reservoir 3 Secondary reservoir 4 Regulating valve 5 樋 6 Casting part 7 Detector 71 Insulating member 72 Metal body 721 Metal wire 722 Metal foil 73 Locking member 731 Conductive member 732 Insulating member 733 Protruding part 740 Hole 8 Secondary cooling part 9 Cast wire 91 Solid phase 92 Liquid phase 93 Crack 10 Operation part 11 Control part 12 Alarm

Claims (6)

A molten metal drop detector used in a metal wire casting facility, and an insulating frame having a plurality of engaging portions arranged opposite to each other,
A plurality of metal bodies locked to the locking portions and fixed between the opposing locking portions;
The molten metal drop detector, wherein the plurality of metal bodies are configured to form a series of electrical circuits.   The molten metal dropping detector according to claim 1, wherein the plurality of metal bodies are configured continuously.   The molten metal dropping detector according to claim 1, wherein the plurality of metal bodies are linear or foil-shaped.   4. The molten metal dropping detector according to claim 1, wherein a melting point of the metal constituting the metal body is equal to or lower than a melting point of a molten metal to be detected. 5.   5. The plurality of engaging portions arranged opposite to each other, wherein one of the opposing engaging portions is formed of an insulating member, and the other is formed of a conductive member. The molten metal dropping detector as described. A molten metal leak detector according to claim 1,
Using a measuring device capable of detecting disconnection of the electric circuit by applying current or voltage to the electric circuit of the detector,
A molten metal dripping detection method, wherein the detector is arranged so that a part of the plurality of metal bodies is disconnected due to leakage of molten metal.

Images