JP2935997B2 - Molten metal level detector - Google Patents
Molten metal level detectorInfo
- Publication number
- JP2935997B2 JP2935997B2 JP24772989A JP24772989A JP2935997B2 JP 2935997 B2 JP2935997 B2 JP 2935997B2 JP 24772989 A JP24772989 A JP 24772989A JP 24772989 A JP24772989 A JP 24772989A JP 2935997 B2 JP2935997 B2 JP 2935997B2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- circuit
- level
- abnormality
- electrodes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、容器に収容された金属溶湯のレベルを検知
するレベル検知装置に関し、特にその検知用電極の損耗
や接続不良などの異常を検出可能にした金属溶湯のレベ
ル検知装置に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a level detecting device for detecting the level of a molten metal contained in a container, and particularly to detecting abnormalities such as wear and poor connection of a detecting electrode. The present invention relates to an apparatus for detecting a level of a molten metal made possible.
通常、鋳鉄やアルミニウムなどの地金を溶解してそれ
らの金属溶湯を作る溶解炉には、溶解炉内の金属溶湯の
液面レベルを検知する為のレベル検知装置が設けられて
いる。2. Description of the Related Art Usually, a melting furnace for melting a metal such as cast iron or aluminum to form a molten metal of the metal is provided with a level detecting device for detecting a liquid level of the molten metal in the melting furnace.
第４図に示したように、上記レベル検知装置100は直
流電源101と溶解炉110の上方に固定して配設された３つ
の接続端子102〜104と各接続端子102〜104に夫々上端部
で取付けられ溶解炉110内に吊下げられた棒状の電極105
〜107などで構成されている。As shown in FIG. 4, the level detecting device 100 includes three connection terminals 102 to 104 fixedly disposed above a DC power supply 101 and a melting furnace 110, and upper ends of the connection terminals 102 to 104, respectively. Rod-shaped electrode 105 attached in the melting furnace 110
To 107 and the like.
上記接続端子102は直流電源101のプラス端子に接続さ
れ、接続端子103はランプ108を介して直流電源101のマ
イナス端子に接続され、接続端子104はランプ109を介し
て直流電源101のマイナス端子に接続されている。The connection terminal 102 is connected to the plus terminal of the DC power supply 101, the connection terminal 103 is connected to the minus terminal of the DC power supply 101 via a lamp 108, and the connection terminal 104 is connected to the minus terminal of the DC power supply 101 via a lamp 109. It is connected.
一方、上記電極105の下端は金属溶湯111に浸漬され、
電極106の下端は第４図に実線で示したように電極105の
下端より上方、例えば金属溶湯111の出湯が可能な液面
レベルとして設定された第１検知レベル112に位置し、
電極107の下端は第４図に一点鎖線で示したように検知
電極106の下端より上方で金属溶湯111が異常に上昇した
液面レベルである第２検知レベル113に位置している。On the other hand, the lower end of the electrode 105 is immersed in the molten metal 111,
The lower end of the electrode 106 is located above the lower end of the electrode 105 as shown by a solid line in FIG. 4, for example, at a first detection level 112 set as a liquid level at which the molten metal 111 can be discharged,
The lower end of the electrode 107 is located at the second detection level 113, which is the liquid level at which the molten metal 111 rises abnormally above the lower end of the detection electrode 106, as indicated by the dashed line in FIG.
上記ランプ108・109は、溶解炉110を操作・監視する
オペレータが視認可能な例えば操作盤などに設けられて
いる。The lamps 108 and 109 are provided on, for example, an operation panel or the like that can be visually recognized by an operator who operates and monitors the melting furnace 110.
このようにレベル検知装置100を設けることにより、
金属溶湯111が第１検知レベル112まで上昇すると、電極
105と電極106が金属溶湯111を介して通電し、ランプ108
が点灯してオペレータに知らせるようになっている。ま
た、金属溶湯111が第２検知レベル113まで上昇した場合
には、電極105と電極107が通電し、ランプ108の点灯に
加えてランプ109が点灯してオペレータに金属溶湯111の
レベルの異常を知らせるようになっている。By providing the level detection device 100 in this way,
When the molten metal 111 rises to the first detection level 112, the electrode
105 and the electrode 106 are energized through the molten metal 111, and the lamp 108
Lights up to inform the operator. When the molten metal 111 rises to the second detection level 113, the electrode 105 and the electrode 107 are energized, and the lamp 109 is turned on in addition to the lighting of the lamp 108 to notify the operator of the abnormality of the level of the molten metal 111. To let you know.
尚、参考までに特開昭53−113723公報には、複数の熱
電対型固定電極に加えて上下動可能な熱電対型可動電極
を設け、金属溶湯のレベル検知の精度の向上を図ったレ
ベル検知装置が記載されている。For reference, JP-A-53-113723 discloses a thermocouple-type movable electrode that can move up and down in addition to a plurality of thermocouple-type fixed electrodes to improve the accuracy of level detection of molten metal. A sensing device is described.
上記レベル検知装置100においては、高温の金属溶湯1
11に接触する電極105・106が損耗して短くなると、第１
検知レベル112を正確に検出出来なくなるという問題が
ある。In the level detecting device 100, the high-temperature molten metal 1
When the electrodes 105 and 106 in contact with 11 are worn and shortened, the first
There is a problem that the detection level 112 cannot be detected accurately.
更に、上記電極105〜107と夫々の接続端子102〜104と
の接続が外れると金属溶湯111の液面レベルの検出が出
来なくなるという問題がある。Further, when the connection between the electrodes 105 to 107 and the respective connection terminals 102 to 104 is disconnected, there is a problem that the liquid level of the molten metal 111 cannot be detected.
本発明の目的は、電極の異常を検出し得る金属溶湯の
レベル検知装置を提供することである。An object of the present invention is to provide a molten metal level detecting device capable of detecting an abnormality of an electrode.
請求項１の金属溶湯のレベル検知装置は、容器内に収
容された金属溶湯の液面レベルを検知するレベル検知装
置において、下端部が液面検出レベルに設定され且つ第
１通電回路に接続された第１電極と、下端部が液面検出
レベルに設定され且つ第２通電回路に接続された第２電
極と、上記第１電極の下端部に接続された第１異常検出
用回路と、上記第２電極の下端部に接続された第２異常
検出用回路と、液面レベル検出時には第１通電回路と第
１電極と金属溶湯と第２電極と第２通電回路とからなる
閉回路を構成する一方、異常検出時には第１通電回路と
第１異常検出用回路とからなる閉回路又は第２通電回路
と第２異常検出用回路とからなる閉回路を構成するよう
に回路を切換える切換スイッチ手段とを設けたものであ
る。請求項２の金属溶湯のレベル検知装置は、請求項１
の発明において、レベルの異なる複数の液面レベル検知
する為に、上記第１電極と第１異常検出用回路と第２電
極と第２異常検出用回路とを、複数のレベルの異なる液
面検出レベルに夫々対応するように複数組設けたもので
ある。According to a first aspect of the present invention, there is provided a level detector for detecting a liquid level of a molten metal contained in a container, wherein a lower end is set to a liquid level detection level and connected to a first energizing circuit. A first electrode, a second electrode having a lower end set to a liquid level detection level and connected to a second energizing circuit, a first abnormality detection circuit connected to a lower end of the first electrode, A second abnormality detecting circuit connected to the lower end of the second electrode, and a closed circuit including a first energizing circuit, a first electrode, a molten metal, a second electrode, and a second energizing circuit when the liquid level is detected. On the other hand, when an abnormality is detected, a switch means for switching a circuit so as to form a closed circuit including a first energizing circuit and a first abnormality detecting circuit or a closed circuit including a second energizing circuit and a second abnormality detecting circuit. Are provided. According to a second aspect of the present invention, there is provided a level detector for molten metal.
According to the invention, in order to detect a plurality of liquid levels at different levels, the first electrode, the first abnormality detection circuit, the second electrode, and the second abnormality detection circuit are connected to a plurality of liquid levels at different levels. A plurality of sets are provided so as to correspond to the respective levels.
請求項１の金属溶湯のレベル検知装置においては、容
器内の金属溶湯のレベルを検出するときには、金属溶湯
を介して第１通電回路と第１電極と第２電極と第２通電
回路とが閉回路を構成するように切換スイッチ手段によ
り回路を切換える。In the metal molten metal level detecting device, when detecting the level of the molten metal in the container, the first energizing circuit, the first electrode, the second electrode, and the second energizing circuit are closed via the molten metal. The circuit is switched by the changeover switch means so as to constitute the circuit.
このとき、容器内に収容された金属溶湯の液面のレベ
ルが第１電極及び第２の電極の下端部以下の低いレベル
にあると、上記閉回路が構成されないため通電しない。At this time, if the liquid level of the molten metal contained in the container is at a low level below the lower ends of the first electrode and the second electrode, the closed circuit is not formed, and thus no electricity is supplied.
金属溶湯の液面レベルが第１電極及び第２電極の下端
部が位置する所定の液面検出レベルまで上昇すると、金
属溶湯を介して上記閉回路が構成され通電する。When the liquid level of the molten metal rises to a predetermined liquid level detection level where the lower ends of the first electrode and the second electrode are located, the closed circuit is formed via the molten metal and electricity is supplied.
従って、上記閉回路内にランプやブザーを設けること
により、ランプの点灯やブザー音で金属溶湯が所定の液
面検出レベルに達したことを検知することが出来る。Therefore, by providing a lamp or a buzzer in the closed circuit, it is possible to detect that the metal melt has reached a predetermined liquid level detection level by turning on the lamp or sounding the buzzer.
一方、電極の異常の有無を検出するときには、第１通
電回路と第１異常検出用回路とからなる閉回路又は第２
通電回路と第２異常検出用回路とからなる閉回路を構成
するように切換スイッチ手段により回路を切換える。On the other hand, when detecting the presence / absence of an abnormality in the electrode, a closed circuit including the first energizing circuit and the first abnormality detecting circuit or the second
The circuit is switched by the changeover switch means so as to form a closed circuit including the energizing circuit and the second abnormality detecting circuit.
第１通電回路が断線したり、第１通電回路と第１電極
とが接続不良になっていたり、第１電極の下端部が損耗
したりすると、第１通電回路と第１異常検出用回路との
閉回路が構成されず通電しない。同様に、第２通電回路
が断線したり、第２通電回路と第２電極とが接続不良に
なっていたり、第２電極の下端部が損耗したりすると、
第２通電回路と第２異常検出用回路との閉回路が構成さ
れず通電しない。If the first energizing circuit is disconnected, if the first energizing circuit and the first electrode are poorly connected, or if the lower end of the first electrode is worn, the first energizing circuit and the first abnormality detection circuit will No closed circuit is formed and no electricity is supplied. Similarly, if the second energizing circuit is disconnected, the second energizing circuit and the second electrode are poorly connected, or the lower end of the second electrode is worn,
No closed circuit is formed between the second energizing circuit and the second abnormality detection circuit, and no current is supplied.
従って、各閉回路内にランプやブザーを設けることに
より、オペレータはランプの点灯やブザー音により各電
極の異常の有無を検出することが出来る。請求項２の金
属溶湯のレベル検知装置においては、レベルの異なる複
数の液面レベルを検知する為に、上記第１電極と第１異
常検出用回路と第２電極と第２異常検出用回路とを、複
数のレベルの異なる液面検出レベルに夫々対応するよう
に複数組設けてあるので、請求項１と同様に、各液面検
出レベルを各組の第１通電回路と第１電極と第２電極と
第２通電回路と切換スイッチ手段を介して検出すること
ができ、また、各組の第１電極やその電気系の異常又は
第２電極やその電気系の異常を検知することができる。Therefore, by providing a lamp or a buzzer in each closed circuit, an operator can detect the presence or absence of an abnormality in each electrode by turning on the lamp or sounding the buzzer. In the metal molten metal level detecting device according to the present invention, the first electrode, the first abnormality detecting circuit, the second electrode, and the second abnormality detecting circuit are used to detect a plurality of liquid levels having different levels. Are provided so as to correspond to a plurality of different liquid level detection levels, respectively, so that each liquid level detection level is set to the first energizing circuit, the first electrode, and the second electrode of each set. Detection can be performed through the two electrodes, the second energizing circuit, and the changeover switch means, and abnormality in the first electrode and its electric system or abnormality in the second electrode and its electric system in each set can be detected. .
請求項１の金属溶湯のレベル検知装置によれば、以上
〔作用〕の項で説明したように各電極の損耗や各通電回
路の断線や各電極と各通電回路との接続不良などの異常
を切換スイッチ手段の簡単な切換操作で検出出来る。そ
して、常に金属溶湯の液面レベルを正確に検知すること
が出来る。According to the apparatus for detecting the level of molten metal of claim 1, abnormalities such as wear of each electrode, disconnection of each energizing circuit, and poor connection between each electrode and each energizing circuit, as described in the above section, are explained. It can be detected by a simple changeover operation of the changeover switch means. Then, the liquid level of the molten metal can always be accurately detected.
加えて、第１電極の下端部を液面検出レベルに設定す
るので、第１電極の損耗を低減することが出来る。請求
項２の金属溶湯のレベル検知装置によれば、上記第１電
極と第１異常検出用回路と第２電極と第２異常検出用回
路とを、複数のレベルの異なる液面検出レベルに夫々対
応するように複数組設けてあるので、複数のレベルの異
なる液面検出レベルを夫々検出することができ、その検
出の為の第１電極やその電気系の異常又は第２電極やそ
の電気系の異常を検知することができる。In addition, since the lower end of the first electrode is set at the liquid level detection level, the wear of the first electrode can be reduced. According to the molten metal level detecting device of the second aspect, the first electrode, the first abnormality detecting circuit, the second electrode, and the second abnormality detecting circuit are respectively set to a plurality of different liquid level detection levels. Since a plurality of sets are provided so as to correspond to each other, a plurality of different liquid level detection levels can be respectively detected, and an abnormality in the first electrode or its electric system or a second electrode or its electric system for the detection can be detected. Abnormality can be detected.
以下、本発明の実施例について図面に基いて説明す
る。Hereinafter, embodiments of the present invention will be described with reference to the drawings.
本実施例は、第１図に示すようにアルミニウム溶湯１
を作るための溶解炉２に設けられたレベル検知装置10に
本発明を適用したものである。In this embodiment, as shown in FIG.
The present invention is applied to a level detecting device 10 provided in a melting furnace 2 for producing the same.
上記レベル検知装置10は、第１液面検出レベル３を検
出する為のＶ型の１対の電極21・22と、第１液面検出レ
ベル３よりも上方の第２液面検出レベル４を検出する為
のＶ型の１対の電極23・24と、電極21・22及び電極23・
24をアルミニウム溶湯１の液面レベルを検出するレベル
検出モードと電極や回路の異常を検出する異常検出モー
ドとに切換えるための電磁切換器30と、溶解炉２を操作
・監視する為のコントロールボックス40と、電極21〜24
を夫々取付ける為の接続端子51〜58と、接続端子51〜58
と電磁切換器30とを接続する導線81〜88などで構成され
ている。The level detecting device 10 includes a pair of V-shaped electrodes 21 and 22 for detecting the first liquid level detection level 3 and a second liquid level detection level 4 higher than the first liquid level detection level 3. A pair of V-shaped electrodes 23 and 24 for detection, electrodes 21 and 22 and electrodes 23 and
Electromagnetic switch 30 for switching 24 to a level detection mode for detecting the liquid level of molten aluminum 1 and an abnormality detection mode for detecting abnormalities of electrodes and circuits, and a control box for operating and monitoring melting furnace 2 40 and electrodes 21-24
Connection terminals 51-58 for attaching
And the electromagnetic switch 30 and the like.
上記電極21は所定長さの電極21aと異常検出用電極21b
からなり、第２図に示すように電極21aと電極21bとは下
端部で接合され、電極21aと電極21bの上端部は夫々接続
端子51・52に取付けられている。The electrode 21 has a predetermined length of electrode 21a and an abnormality detection electrode 21b.
As shown in FIG. 2, the electrodes 21a and 21b are joined at their lower ends, and the upper ends of the electrodes 21a and 21b are attached to connection terminals 51 and 52, respectively.
上記電極22は所定長さの電極22aと異常検出用電極22b
からなり、電極22aと電極22bとは下端部で接合され、電
極22aと電極22bの上端部は夫々接続端子53・54に取付け
られている。The electrode 22 includes an electrode 22a having a predetermined length and an abnormality detection electrode 22b.
The electrodes 22a and 22b are joined at the lower ends, and the upper ends of the electrodes 22a and 22b are attached to connection terminals 53 and 54, respectively.
上記電極21・22は溶解炉２内に吊下げられ、電極21・
22の下端部は第１図に実線で示したようにアルミニウム
溶湯１の出湯が可能な第１液面検出レベル３に位置する
ようになっている。The electrodes 21 and 22 are suspended in the melting furnace 2 and the electrodes 21 and 22 are suspended.
The lower end of 22 is located at the first liquid level detection level 3 at which the molten aluminum 1 can be discharged as shown by the solid line in FIG.
上記電極23は所定長さの電極23aと異常検出用電極23b
からなり、電極23aと電極23bとは下端部で接合され、電
極23aと電極23bの上端部は夫々接続端子55・56に取付け
られている。The electrode 23 includes an electrode 23a having a predetermined length and an abnormality detection electrode 23b.
The electrodes 23a and 23b are joined at lower ends, and upper ends of the electrodes 23a and 23b are attached to connection terminals 55 and 56, respectively.
上記電極24は所定長さの電極24aと異常検出用電極24b
からなり、電極24aと電極24bとは下端部で接合され、電
極24aと電極24bの上端部は夫々接続端子57・58に取付け
られている。The electrode 24 includes a predetermined length electrode 24a and an abnormality detection electrode 24b.
The electrodes 24a and 24b are joined at the lower ends, and the upper ends of the electrodes 24a and 24b are attached to connection terminals 57 and 58, respectively.
上記電極23・24は溶解炉２内に吊下げられ、電極23・
24の下端部は第１図に一点鎖線で示したようにアルミニ
ウム溶湯１が異常に上昇した場合の第２液面検出レベル
４に位置するようになっている。The electrodes 23 and 24 are suspended in the melting furnace 2 and the electrodes 23 and 24 are suspended.
The lower end of 24 is located at the second liquid level detection level 4 when the aluminum melt 1 rises abnormally as shown by the dashed line in FIG.
上記電磁切換器30は一対の単極双投型の電磁切換器31
・32からなり、電磁切換器31は共通端子31aと切換端子3
1b・31cを有し、電磁切換器32は共通端子32aと切換端子
32b・32cを有し、共通端子31aはコントロールボックス4
0の直流電源40aのプラス端子に接続され、共通端子32a
は直流電源40aのマイナス端子に接続されている。The electromagnetic switch 30 is a pair of single pole double throw type electromagnetic switches 31.
32, the electromagnetic switch 31 has a common terminal 31a and a switching terminal 3
1b and 31c, the electromagnetic switch 32 has a common terminal 32a and a switching terminal
It has 32b and 32c, and the common terminal 31a is the control box 4
0 is connected to the positive terminal of the DC power supply 40a and the common terminal 32a
Is connected to the negative terminal of the DC power supply 40a.
次に、上記接続端子51〜58と電磁切換器31・32との接
続について説明する。Next, the connection between the connection terminals 51 to 58 and the electromagnetic switches 31 and 32 will be described.
上記接続端子51は導線81を介して切換端子31bに接続
され、接続端子52は直列に介設されたランプ61と電磁開
閉器71を有する導線82を介して切換端子32cに接続さ
れ、接続端子53はランプ62を有する導線83介して切換端
子32bに接続され、接続端子54は電磁開閉器72を有する
導線84を介して切換端子31cに接続され、接続端子55は
導線85を介して切換端子31bに接続され、接続端子56は
直列に介設されたランプ63と電磁開閉器73を有する導線
86を介して切換端子32cに接続され、接続端子57はラン
プ64を有する導線87を介して切換端子32bに接続され、
接続端子58は電磁開閉器74を有する導線88を介して切換
端子31cに接続されている。The connection terminal 51 is connected to a switching terminal 31b via a conductor 81, and the connection terminal 52 is connected to a switching terminal 32c via a conductor 82 having a lamp 61 and an electromagnetic switch 71 interposed in series. 53 is connected to the switching terminal 32b via a conductor 83 having a lamp 62, the connection terminal 54 is connected to the switching terminal 31c via a conductor 84 having an electromagnetic switch 72, and the connection terminal 55 is switched via a conductor 85. 31b, a connection terminal 56 is a conductor having a lamp 63 and an electromagnetic switch 73 interposed in series.
The switching terminal 32c is connected to the switching terminal 32c via 86, the connection terminal 57 is connected to the switching terminal 32b via a conducting wire 87 having a lamp 64,
The connection terminal 58 is connected to the switching terminal 31c via a conducting wire 88 having an electromagnetic switch 74.
上記ランプ61〜64は、オペレータが視認可能なように
コントロールボックス40の表示パネルに取付けられてい
る。The lamps 61 to 64 are attached to a display panel of the control box 40 so that the lamps can be visually recognized by an operator.
上記コントロールボックス40はタイマーを備えプログ
ラム可能なシーケンスコントローラからなり、シーケン
スコントローラには予め設定されたシーケンスがプログ
ラムされている。The control box 40 includes a programmable sequence controller having a timer, and a sequence set in advance is programmed in the sequence controller.
上記電磁切換器31・32及び電磁開閉器71〜74は、コン
トロールボックス40からの切換信号により切換えられる
ようになっており、上記コントロールボックス40には、
シーケンスコントローラをレベル検出モードと異常検出
モードとに切換えるための切換スイッチ41が設けられて
いる。The electromagnetic switches 31 and 32 and the electromagnetic switches 71 to 74 are configured to be switched by a switching signal from the control box 40.
A changeover switch 41 for switching the sequence controller between the level detection mode and the abnormality detection mode is provided.
以上のように構成されたレベル検知装置10の作用につ
いて説明する。The operation of the level detection device 10 configured as described above will be described.
上記電極21・22及び電極23・24をレベル検知モードに
設定する場合には、オペレータが切換スイッチ41をレベ
ル検出モード側に切換える。この時、コントロールボッ
クス40からの切換信号により、電磁切換器31の共通端子
31aと切換端子31bとが閉成され、電磁切換器32の共通端
子32aと切換端子32bが閉成され、電磁開閉器71〜74が開
成される。When setting the electrodes 21 and 22 and the electrodes 23 and 24 to the level detection mode, the operator switches the changeover switch 41 to the level detection mode. At this time, the common terminal of the electromagnetic switch 31 is switched by the switching signal from the control box 40.
31a and the switching terminal 31b are closed, the common terminal 32a and the switching terminal 32b of the electromagnetic switch 32 are closed, and the electromagnetic switches 71 to 74 are opened.
このように電極21・22及び電極23・24をレベル検知モ
ードに設定することにより、溶解炉２内のアルミニウム
地金の溶解がすすみアルミニウム溶湯１の液面レベルが
第１液面検出レベル３まで上昇すると、導線81と電極21
aとアルミニウム溶湯１と電極22aと導線83とからなる閉
回路が構成されて通電し、ランプ62が点灯する。オペレ
ータはランプ62の点灯を確認した後、溶解を停止して溶
解炉２内のアルミニウム溶湯１を出湯する。By setting the electrodes 21 and 22 and the electrodes 23 and 24 to the level detection mode in this way, the aluminum metal in the melting furnace 2 is dissolved, and the liquid level of the aluminum melt 1 is increased to the first liquid level detection level 3. When raised, the conductor 81 and the electrode 21
A closed circuit composed of a, the molten aluminum 1, the electrode 22a, and the conducting wire 83 is formed, energized, and the lamp 62 is turned on. After confirming that the lamp 62 is turned on, the operator stops melting and discharges the molten aluminum 1 in the melting furnace 2.
また、万一アルミニウム溶湯１が第２液面検出レベル
４まで上昇した場合には、上記閉回路に加えて導線85と
電極23a（或いは導線81と電極21a）とアルミニウム溶湯
１と電極24aと導線87とからなる閉回路が構成されて通
電し、ランプ62に加えてランプ64が点灯してオペレータ
に異常を知らせるようになっている。If the aluminum melt 1 rises to the second liquid level detection level 4 in addition to the above-mentioned closed circuit, the conductor 85 and the electrode 23a (or the conductor 81 and the electrode 21a), the aluminum melt 1, the electrode 24a and the conductor A closed circuit made up of a lamp 87 is formed and energized, and the lamp 64 is turned on in addition to the lamp 62 to notify the operator of the abnormality.
上記電極21・22及び電極23・24を異常検出モードに設
定する場合には、例えばアルミニウム溶湯１を溶解炉２
から出湯した後、切換スイッチ41を異常検出モード側に
切換える。When the electrodes 21 and 22 and the electrodes 23 and 24 are set to the abnormality detection mode, for example, the molten aluminum 1 is placed in the melting furnace 2.
Then, the changeover switch 41 is switched to the abnormality detection mode side.
異常検出モードに設定されると、コントロールボック
ス40からの切換信号により電磁切換器31・32及び電磁開
閉器71〜74は以下のようなシーケンスに従って切換えら
れる。When the abnormality detection mode is set, the electromagnetic switches 31 and 32 and the electromagnetic switches 71 to 74 are switched according to the following sequence in accordance with a switching signal from the control box 40.
先ず、コントロールボックス40から電磁切換器32と電
磁開閉器71に切換信号が出力され、電磁切換器32の共通
端子32aと切換端子32cが閉成するとともに電磁開閉器71
が閉成する。尚、電磁切換器31は共通端子31aと切換端
子31bが閉成し、電磁開閉器72〜74は開成している。First, a switching signal is output from the control box 40 to the electromagnetic switch 32 and the electromagnetic switch 71, the common terminal 32a and the switching terminal 32c of the electromagnetic switch 32 are closed, and the electromagnetic switch 71 is closed.
Closes. In the electromagnetic switch 31, the common terminal 31a and the switching terminal 31b are closed, and the electromagnetic switches 72 to 74 are open.
電極21が正常な場合には、導線81と電極21aと異常検
出用電極21bと導線82とからなる閉回路が構成されて通
電しランプ61が点灯するので、オペレータは電極21が正
常であることを確認出来る。When the electrode 21 is normal, a closed circuit including the conducting wire 81 and the electrode 21a, the abnormality detecting electrode 21b, and the conducting wire 82 is formed to energize the lamp 61 and the operator turns on the lamp 61. Can be confirmed.
一方、電極21が異常な場合、即ち電極21aと接続端子5
1との接続が外れているときや或いは電極21aと異常検出
用電極21bとの接合部が高温のアルミニウム溶湯１との
接触により損耗して短くなり第３図に示すように接合が
分離した場合などには、上記閉回路が構成されずランプ
61が点灯しないため、オペレータは電極21の異常を確認
出来る。On the other hand, if the electrode 21 is abnormal, that is, the electrode 21a and the connection terminal 5
When the connection with the electrode 1 is disconnected, or when the joint between the electrode 21a and the abnormality detection electrode 21b is worn and shortened due to contact with the high-temperature molten aluminum 1 and the joint is separated as shown in FIG. For example, the lamp does not have the closed circuit
Since 61 does not light, the operator can confirm the abnormality of the electrode 21.
次に、コントロールボックス40から電磁開閉器71・73
に切換信号が出力され、電磁開閉器71が開成するととも
に電磁開閉器73が閉成する。尚、電磁切換器31・32は上
記と同様の状態にあり、電磁開閉器72・74は開成してい
る。Next, from the control box 40, the electromagnetic switches 71 and 73
A switching signal is output to the switch, and the electromagnetic switch 71 is opened and the electromagnetic switch 73 is closed. The electromagnetic switches 31 and 32 are in the same state as described above, and the electromagnetic switches 72 and 74 are open.
電極23が正常な場合には、導線85と電極23aと異常検
出用電極23bと導線86とからなる閉回路が構成されて通
電しランプ63が点灯するので、オペレータは電極23が正
常であることを確認出来る。When the electrode 23 is normal, a closed circuit composed of the conductor 85, the electrode 23a, the abnormality detection electrode 23b, and the conductor 86 is formed and the lamp 63 is turned on and the operator turns on the electrode 23. Can be confirmed.
一方、電極21の場合と同様に、電極23が異常な場合に
は、上記閉回路が構成されずランプ63が点灯しないた
め、オペレータは電極23の異常を確認出来る。On the other hand, as in the case of the electrode 21, when the electrode 23 is abnormal, the above-described closed circuit is not formed and the lamp 63 is not turned on.
次に、コントロールボックス40から電磁切換器31・32
と電磁開閉器72・73に切換信号が出力され、共通端子31
aと切換端子31cが閉成し、共通端子32aと切換端子32bが
閉成し、電磁開閉器72が閉成し、電磁開閉器73が開成す
る。尚、電磁開閉器71・74は開成状態にある。Next, from the control box 40, the electromagnetic switches 31 and 32
And a switching signal is output to the electromagnetic switches 72 and 73, and the common terminal 31
a and the switching terminal 31c are closed, the common terminal 32a and the switching terminal 32b are closed, the electromagnetic switch 72 is closed, and the electromagnetic switch 73 is opened. Note that the electromagnetic switches 71 and 74 are in an open state.
電極22が正常な場合には、導線84と異常検出用電極22
bと電極22aと導電線83とからなる閉回路が構成されて通
電しランプ62が点灯するので、オペレータは電極22が正
常であることを確認出来る。If the electrode 22 is normal, the conductor 84 and the abnormality detection electrode 22
Since a closed circuit including the electrode b, the electrode 22a, and the conductive wire 83 is formed and the lamp 62 is turned on by energization, the operator can confirm that the electrode 22 is normal.
一方、電極21の場合と同様に、電極22が異常な場合に
は、上記閉回路が構成されずランプ62が点灯しないた
め、オペレータは電極22の異常を確認出来る。On the other hand, as in the case of the electrode 21, when the electrode 22 is abnormal, the above-mentioned closed circuit is not formed and the lamp 62 is not turned on.
次に、コントロールボックス40から電磁開閉器72・74
に切換信号が出力され、電磁切換器72が開成し、電磁切
換器74が閉成する。尚、電磁切換器31・32は上記と同様
の状態にあり、電磁開閉器71・73は開成状態にある。Next, from the control box 40, the electromagnetic switches 72 and 74
A switching signal is output to the switch, the electromagnetic switch 72 is opened, and the electromagnetic switch 74 is closed. The electromagnetic switches 31 and 32 are in the same state as described above, and the electromagnetic switches 71 and 73 are in the open state.
電極24が正常な場合には、導線88と異常検出用電極24
bと電極24aと導線87とからなる閉回路が構成されて通電
しランプ64が点灯するので、オペレータは電極24が正常
であることを確認出来る。If the electrode 24 is normal, the conductor 88 and the electrode 24
Since a closed circuit including the electrode b, the electrode 24a, and the conducting wire 87 is formed and energized to turn on the lamp 64, the operator can confirm that the electrode 24 is normal.
一方、電極21の場合と同様に、電極24が異常な場合に
は、上記閉回路が構成されずランプ64が点灯しないた
め、オペレータは電極24の異常を確認出来る。On the other hand, similarly to the case of the electrode 21, when the electrode 24 is abnormal, the closed circuit is not formed and the lamp 64 does not turn on, so that the operator can confirm the abnormality of the electrode 24.
このようにして、電極21・22及び電極23・24の異常の
有無の確認が終わり、電極21・22及び電極23・24に異常
がないことが確認され、オペレータが切換スイッチ41を
レベル検出モードに切換えると、コントロールボックス
40から電磁切換器31と電磁切換器74に切換信号が出力さ
れ、共通端子31aと切換端子31bが閉成し、電磁開閉器74
が開成して、電極21・22及び電極23・24をレベル検知モ
ードに設定する。In this way, the confirmation of the presence or absence of abnormality in the electrodes 21 and 22 and the electrodes 23 and 24 is completed, and it is confirmed that there is no abnormality in the electrodes 21 and 22 and the electrodes 23 and 24. The operator sets the changeover switch 41 to the level detection mode. Switch to the control box
A switching signal is output from 40 to the electromagnetic switch 31 and the electromagnetic switch 74, the common terminal 31a and the switch terminal 31b are closed, and the electromagnetic switch 74
Is opened to set the electrodes 21 and 22 and the electrodes 23 and 24 to the level detection mode.
一方、電極21・22及び電極23・24に異常が確認された
場合には、オペレータによる電極の交換或いは電気系の
補修が行われる。On the other hand, when abnormality is confirmed in the electrodes 21 and 22 and the electrodes 23 and 24, replacement of the electrodes or repair of the electric system is performed by the operator.
このように、電極21・22及び電極23・24の損耗や接続
不良などの異常を簡単な操作で検出することが出来る。
そして、溶解炉２内のアルミニウム溶湯１の液面レベル
を常に正確に検知することが出来る。As described above, abnormalities such as wear and poor connection of the electrodes 21 and 22 and the electrodes 23 and 24 can be detected by a simple operation.
Then, the liquid level of the molten aluminum 1 in the melting furnace 2 can always be accurately detected.
尚、上記レベル検知装置10は、アルミニウム溶湯１の
液面レベルだけでなく鋳鉄やアルミニウム合金など種々
の金属溶湯の液面レベルの検知に使用出来ることは勿論
である。また、上記電極21・22及び電極23・24は接合に
よりＶ型に形成したが、一体的にＶ型に形成してもよ
い。The level detector 10 can of course be used to detect not only the liquid level of the molten aluminum 1 but also the liquid level of various molten metals such as cast iron and aluminum alloy. Although the electrodes 21 and 22 and the electrodes 23 and 24 are formed in a V-shape by bonding, they may be integrally formed in a V-shape.
更に、ランプ61〜64にかえて、ブザーや電流計を使用
することも可能である。尚、電極21の下端は第１液面検
出レベル３以下のレベルに設定されていてもよく、電極
23は必ずしも必要でないので省略してもよい。Further, a buzzer or an ammeter can be used instead of the lamps 61 to 64. The lower end of the electrode 21 may be set at a level equal to or lower than the first liquid level detection level 3,
23 is not necessary and may be omitted.
【図面の簡単な説明】 第１図〜第３図は本発明の実施例を示すもので、第１図
はレベル検知装置の構成図、第２図は電極の下端部の拡
大図、第３図は電極の下端部の損耗状態を示す拡大図、
第４図は従来技術に係るレベル検知装置の構成図であ
る。 １……アルミニウム溶湯、２……溶解炉、３……第１液
面検出レベル、４……第２液面検出レベル、21a〜24a…
…電極、21b〜24b……異常検出用電極、31・32……電磁
切換器、40……コントロールボックス、81〜88……導
線。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 to FIG. 3 show an embodiment of the present invention, FIG. 1 is a configuration diagram of a level detection device, FIG. 2 is an enlarged view of a lower end portion of an electrode, FIG. The figure is an enlarged view showing the worn state of the lower end of the electrode,
FIG. 4 is a configuration diagram of a level detection device according to the prior art. 1 ... Molten aluminum, 2 ... Melting furnace, 3 ... First liquid level detection level, 4 ... Second liquid level detection level, 21a to 24a ...
... electrodes, 21b to 24b ... abnormal detection electrodes, 31 and 32 ... electromagnetic switches, 40 ... control boxes, 81 to 88 ... lead wires.
Claims (2)
を検知するレベル検知装置において、 下端部が液面検出レベルに設定され且つ第１通電回路に
接続された第１電極と、下端部が液面検出レベルに設定
され且つ第２通電回路に接続された第２電極と、上記第
１電極の下端部に接続された第１異常検出用回路と、 上記第２電極の下端部に接続された第２異常検出用回路
と、 液面レベル検出時には第１通電回路と第１電極と金属溶
湯と第２電極と第２通電回路とからなる閉回路を構成す
る一方、異常検出時には第１通電回路と第１異常検出用
回路とからなる閉回路又は第２通電回路と第２異常検出
用回路とからなる閉回路を構成するように回路を切換え
る切換スイッチ手段とを設けたことを特徴とする金属溶
湯のレベル検知装置。1. A level detecting device for detecting a liquid level of a molten metal contained in a container, wherein a lower end is set to a liquid level detecting level and a first electrode connected to a first energizing circuit; A second electrode connected to a second energizing circuit, a first abnormality detecting circuit connected to a lower end of the first electrode, and a second electrode connected to a second energizing circuit; A second circuit for detecting abnormality connected thereto, and a closed circuit comprising a first energizing circuit, a first electrode, a molten metal, a second electrode, and a second energizing circuit when the liquid level is detected; Switch switch means for switching a circuit so as to form a closed circuit including one energizing circuit and a first abnormality detecting circuit or a closed circuit including a second energizing circuit and a second abnormality detecting circuit is provided. Metal melt level detector.
る為に、上記第１電極と第１異常検出用回路と第２電極
と第２異常検出用回路とを、複数のレベルの異なる液面
検出レベルに夫々対応するように複数組設けたことを特
徴とする請求項１に記載の金属溶湯のレベル検知装置。2. The method according to claim 1, wherein the first electrode, the first abnormality detecting circuit, the second electrode, and the second abnormality detecting circuit are connected to a plurality of liquids having different levels to detect a plurality of liquid levels having different levels. 2. The metal molten metal level detecting device according to claim 1, wherein a plurality of sets are provided so as to correspond to the surface detection levels, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24772989A JP2935997B2 (en) | 1989-09-22 | 1989-09-22 | Molten metal level detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24772989A JP2935997B2 (en) | 1989-09-22 | 1989-09-22 | Molten metal level detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03110387A JPH03110387A (en) | 1991-05-10 |
| JP2935997B2 true JP2935997B2 (en) | 1999-08-16 |
Family
ID=17167806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24772989A Expired - Lifetime JP2935997B2 (en) | 1989-09-22 | 1989-09-22 | Molten metal level detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2935997B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU5333699A (en) * | 1998-08-10 | 2000-03-06 | Vesuvius Crucible Company | Tapered probe for mold level control |
| JP7000824B2 (en) * | 2017-12-07 | 2022-01-19 | 株式会社リコー | Liquid detection device, image forming device equipped with it, liquid detection method, and program for liquid detection |
-
1989
- 1989-09-22 JP JP24772989A patent/JP2935997B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03110387A (en) | 1991-05-10 |
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