JPH01284739A - Molten metal leak detecting device - Google Patents
Molten metal leak detecting deviceInfo
- Publication number
- JPH01284739A JPH01284739A JP11405988A JP11405988A JPH01284739A JP H01284739 A JPH01284739 A JP H01284739A JP 11405988 A JP11405988 A JP 11405988A JP 11405988 A JP11405988 A JP 11405988A JP H01284739 A JPH01284739 A JP H01284739A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- optical fiber
- light
- light receiving
- leak
- 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.)
- Pending
Links
- 239000002184 metal Substances 0.000 title claims abstract description 36
- 239000013307 optical fiber Substances 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 2
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 230000004927 fusion Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000004512 die casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
Landscapes
- Examining Or Testing Airtightness (AREA)
- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はダイカストマシンにおける金属溶湯の洩れを検
出する装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for detecting leakage of molten metal in a die-casting machine.
［従来の技術］
従来、金属溶湯の漏洩検出装置は第３図に示すように漏
れを検出したい場所に、％ｉ極（１）６および電８ｉ（
ＩＩ）７を設置し、該電極（Ｉ）６．電極（■）７に電
圧を加える。この状態では前記の電極（Ｉ）６と電極（
■）７の間は絶縁されている。[Prior Art] Conventionally, a molten metal leak detection device has a %i electrode (1) 6 and an electrode 8i (
II) 7 is installed, and the electrode (I) 6. Apply voltage to electrode (■) 7. In this state, the electrode (I) 6 and the electrode (
■) 7 is insulated.
金属溶湯が漏れると両極間が、溶融金属で短絡して電流
が流れることにより検出を行っていた。When molten metal leaks, the molten metal short-circuits the two electrodes and current flows to detect the leakage.
第４図および第５図は金属の溶湯漏洩検出装置の他の従
来例であり、金属溶湯が漏れた場合に電極（Ｉ）９と電
極（■）１０の間、又は電極（１）１３と電極（ＩＩ）
１４の間が溶融金属で短絡して電流が流れ、金属溶湯の
漏洩を検知していた。Figures 4 and 5 show other conventional examples of molten metal leakage detection devices, in which when molten metal leaks, it is detected between the electrode (I) 9 and the electrode (■) 10 or between the electrode (1) 13. Electrode (II)
14 was short-circuited by molten metal, current flowed, and leakage of molten metal was detected.
［発明が解決しようとする課題］
しかし、上記いずれの従来例においても、電極間の通電
によるものであるから、電極の酸化により導電性が低下
して金属溶湯の漏れの検知が不良になる場合があり、又
電極間が該金属溶湯以外の他の導電材料の接触により短
絡して誤検知する場合等により信頼性が低く、安全装置
としては問題があった。[Problem to be Solved by the Invention] However, in any of the above conventional examples, since current is passed between the electrodes, the conductivity may decrease due to oxidation of the electrodes, resulting in poor detection of leakage of molten metal. Moreover, the reliability is low due to short-circuiting between the electrodes due to contact with other conductive materials other than the molten metal, resulting in false detection, and there are problems as a safety device.
本発明は上記従来技術の欠点に鑑み、誤検知や酸化によ
る機能低下のない信頼性の高い金属溶湯の漏洩検出装置
を得ることを目的とする。SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a highly reliable molten metal leak detection device that is free from false detection and functional deterioration due to oxidation.
［課題を解決するための手段］
この目的を達成するために、本発明では金属溶湯の洩れ
を検出すべき箇所に光ファイバーを張りめぐらせ、該光
ファイバーの一端を投受光機の投光側に、他端は該投受
光機の受光側に接続されてループをなし、漏洩した金属
溶湯による光ファイバーの溶断を、前記受光側の光セン
サーで検知して漏洩信号を発信するように構成したこと
を特徴とする金属溶湯漏洩検出装置を提供する。[Means for Solving the Problem] In order to achieve this object, in the present invention, an optical fiber is stretched around the location where leakage of molten metal is to be detected, and one end of the optical fiber is connected to the light emitting side of the light projector/receiver. The other end is connected to the light receiving side of the light emitter/receiver to form a loop, and the optical sensor on the light receiving side detects fusing of the optical fiber due to leaked molten metal and transmits a leakage signal. A molten metal leak detection device is provided.
［作用］
本発明においては、金属溶湯の洩れにより光ファイバー
に該溶湯が触れると、光ファイバーが溶断し、投受光機
により受光時閉回路の警報出力が開回路となる０ｇ報出
力の差により警報を発し金属溶湯の漏洩を検出すること
ができる。[Function] In the present invention, when the molten metal leaks and comes into contact with the optical fiber, the optical fiber is fused and the transmitter/receiver generates an alarm due to the difference in the 0g signal output, which changes the alarm output from a closed circuit to an open circuit when receiving light. It is possible to detect leakage of molten metal.
［実施例］ 次に本発明の実施例を図面に基づいて説明する。[Example] Next, embodiments of the present invention will be described based on the drawings.
第１図は本発明の実施例の溶湯漏洩検出器４の構成を示
す平面図で、金網２に光ファイバー１を格子状に取付け
てあり、該光ファイバー１は投受光機３に接続されてい
る。第２図に示す端部の折り返しの寸法の高い受皿５の
中の下部に、前記第１図の溶湯漏洩検出器４の格子部分
を置く。該第１図の溶湯漏洩検出器４と、第２図の受皿
５で構成された溶湯漏洩検出装置を湯洩れ検知すべき箇
所に設置する。金属溶湯が漏洩すると光ファイバー４が
溶断して、警報を発することにより湯洩れを検出する。FIG. 1 is a plan view showing the configuration of a molten metal leakage detector 4 according to an embodiment of the present invention. Optical fibers 1 are attached to a metal mesh 2 in a grid pattern, and the optical fibers 1 are connected to a light emitter/receiver 3. The grid portion of the molten metal leakage detector 4 shown in FIG. 1 is placed in the lower part of the receiving tray 5 with a large folded end shown in FIG. A molten metal leak detection device consisting of the molten metal leak detector 4 shown in FIG. 1 and the saucer 5 shown in FIG. 2 is installed at a location where a molten metal leak is to be detected. When molten metal leaks, the optical fiber 4 is fused and an alarm is issued to detect the leak.
［発明の効果］
以上説明した様に本発明に依れば、プラスッチクス材の
光ファイバーを使用することにより、取付けが自由に出
来るため取扱いが容易であり、しかも酸化による機能劣
下がないために信頼性が高く、低融点材料なので溶湯の
漏洩検知の感度が高い。[Effects of the Invention] As explained above, according to the present invention, by using an optical fiber made of plastic material, it is easy to handle because it can be attached freely, and there is no functional deterioration due to oxidation. It is highly reliable and has a high sensitivity for detecting molten metal leaks because it is a low melting point material.
検出部が省電しないので安全性にすぐれており、金属溶
湯以外の導電材料の存在による誤検知が無いために信頼
性が向上できる。It has excellent safety because the detection part does not save power, and reliability can be improved because there is no false detection due to the presence of conductive materials other than molten metal.
第１図は本発明の実施例の検出部のシステム構成を示す
説明図、第２図は第１図を入れる受皿の概略図、第３図
ないし第５図は従来の実施例を示す説明図である。
１・・・光ファイバー、２・・・金網、３・・・投受光
機。
８．１２．１５・・・漏洩した金属溶湯、１１・・・絶
縁材Fig. 1 is an explanatory diagram showing the system configuration of the detection unit according to the embodiment of the present invention, Fig. 2 is a schematic diagram of a saucer in which Fig. 1 is placed, and Figs. 3 to 5 are explanatory diagrams showing conventional embodiments. It is. 1... Optical fiber, 2... Wire mesh, 3... Light emitter/receiver. 8.12.15...Leaked molten metal, 11...Insulating material
Claims (1)
記溶融金属漏洩部に配設し、該光ファイバーの一端は投
受光機の投光側に接続され、他の一端は該投受光機の受
光側に接続されてループをなしていて、前記溶融金属の
漏洩による前記光ファイバーの溶断によって前記受光側
の光センサーに投光する光を遮断し、前記光センサーで
漏洩信号を発信するように構成したことを特徴とする溶
湯漏洩検出装置。An optical fiber made of plastic material, which is a low-melting material, is arranged in the molten metal leakage part, one end of the optical fiber is connected to the light emitting side of the light emitter/receiver, and the other end is connected to the light receiving side of the light emitter/receiver. and forming a loop, the light emitted to the light receiving side optical sensor is blocked by fusing of the optical fiber due to leakage of the molten metal, and the optical sensor transmits a leakage signal. Molten metal leak detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11405988A JPH01284739A (en) | 1988-05-11 | 1988-05-11 | Molten metal leak detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11405988A JPH01284739A (en) | 1988-05-11 | 1988-05-11 | Molten metal leak detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01284739A true JPH01284739A (en) | 1989-11-16 |
Family
ID=14628001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11405988A Pending JPH01284739A (en) | 1988-05-11 | 1988-05-11 | Molten metal leak detecting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01284739A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6161458B2 (en) * | 1980-07-18 | 1986-12-25 | Matsushita Electric Ind Co Ltd |
-
1988
- 1988-05-11 JP JP11405988A patent/JPH01284739A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6161458B2 (en) * | 1980-07-18 | 1986-12-25 | Matsushita Electric Ind Co Ltd |
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