JPH0722397U - Vacuum melting device with auxiliary operating mechanism that doubles as a viewing window - Google Patents
Vacuum melting device with auxiliary operating mechanism that doubles as a viewing windowInfo
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- JPH0722397U JPH0722397U JP5333393U JP5333393U JPH0722397U JP H0722397 U JPH0722397 U JP H0722397U JP 5333393 U JP5333393 U JP 5333393U JP 5333393 U JP5333393 U JP 5333393U JP H0722397 U JPH0722397 U JP H0722397U
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- Prior art keywords
- auxiliary operation
- auxiliary
- lid member
- ring
- hole
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Abstract
(57)【要約】 （修正有）
【目的】ルツボ内の溶湯の全域を確実に監視し、かつ必
要な補助操作を容易に行う。
【構成】真空容器の頂壁上でルツボの中心軸線上の貫通
穴に挿入され中心部に貫通穴を有する中空円筒体６と、
この中空円筒体６の上端に気密に装着された透明な蓋部
材９と、中間にフランジを有し上部が蓋部材９より上に
突出し、下部が中空円筒体内６内に突出し上、下がナッ
ト１２，１１で締め付けられた保持金具１０と、この保
持金具１０の中心部の貫通穴１０ａ内に挿入される操作
棒とを含んで補助操作機構１３が構成され、この補助操
作機構１３の外周の蓋部材９の環状の部分が補助操作機
構１３と同軸の覗き窓４ａとなる構成である、覗き窓を
兼ねた補助操作機構を有する真空溶解装置。
(57) [Summary] (Corrected) [Purpose] To reliably monitor the entire area of the molten metal in the crucible and to easily perform the necessary auxiliary operations. A hollow cylindrical body (6) having a through hole inserted in a through hole on a central axis of a crucible on a top wall of a vacuum container,
A transparent lid member 9 airtightly attached to the upper end of the hollow cylindrical body 6, an upper portion protruding above the lid member 9 having a flange in the middle, a lower portion protruding into the hollow cylindrical body 6, and an upper portion and a lower portion are nuts. An auxiliary operating mechanism 13 is configured to include the holding metal fitting 10 tightened with 12, 11 and an operating rod inserted into the through hole 10a at the center of the holding metal fitting 10. A vacuum melting apparatus having an auxiliary operating mechanism that also serves as a viewing window, in which the annular portion of the lid member 9 serves as the viewing window 4a coaxial with the auxiliary operating mechanism 13.
Description
【０００１】[0001]
この考案は真空中又は不活性ガス雰囲気下において高純度、高融点または活性 金属や、それらの合金を溶解する電磁誘導加熱による真空溶解装置において、特 に小型の真空溶解装置での覗き窓と補助操作機構の改良に関する。 This invention is a vacuum melting apparatus by electromagnetic induction heating that melts high-purity, high-melting point or active metals and their alloys in a vacuum or in an inert gas atmosphere. Regarding improvement of operating mechanism.
【０００２】[0002]
従来使用されている真空溶解装置の部分断面立面図である図４を参照して従来 技術を説明する。 真空又は不活性ガス雰囲気下で高純度、高融点又は活性金属やそれらの合金の 溶解を行う真空溶解装置では、真空又は雰囲気を保つための真空容器２中に誘導 溶解炉１が設置されている。 この誘導溶解炉１の内側には被溶解材料を溶解し溶湯を保持するためのセラミ ック製あるいは水冷銅ルツボが配置され、またこのルツボ中における被溶解材料 の溶融状態を真空容器の外部から監視し、また以下に述べる各種の補助操作を円 滑に進めるために、ルツボ１ａの斜め上方に覗き窓４が、さらにルツボ内の溶湯 の温度を測定したり、溶解の途中で未溶解の装入材をつついたり、棚吊りを防止 するためルツボ内の未溶融の被溶解材料を突き落とし、あるいは溶湯成分を化学 分析、スペクトル分析などの試料として採取するためのサンプリングなどの補助 操作を行う補助操作機構３が、真空容器の上部に設置されているのが一般的であ る。 The prior art will be described with reference to FIG. 4, which is a partial sectional elevational view of a vacuum melting apparatus used in the past. In a vacuum melting apparatus for melting high-purity, high-melting point or active metals and their alloys in a vacuum or an inert gas atmosphere, an induction melting furnace 1 is installed in a vacuum container 2 for maintaining a vacuum or atmosphere. . Inside the induction melting furnace 1, a ceramic or water-cooled copper crucible for melting the material to be melted and holding the molten metal is arranged, and the melting state of the material to be melted in this crucible is checked from the outside of the vacuum container. In order to smoothly monitor and perform various auxiliary operations described below, a peep window 4 is provided obliquely above the crucible 1a to measure the temperature of the molten metal in the crucible, and to measure unmelted equipment during melting. Auxiliary operations such as picking up materials, pushing down unmelted material to be melted in the crucible to prevent hanging from the shelf, or performing auxiliary operations such as sampling for collecting molten metal components as samples for chemical analysis, spectrum analysis, etc. The mechanism 3 is generally installed above the vacuum container.
【０００３】[0003]
通常の真空溶解炉の概略構造は上記のようにされているが、誘導溶解炉の容量 が小さい場合、即ち投入する原料の重量がＦｅ換算で約４kg程度以下の少容量で ルツボの内径が１０cm以下の小型真空溶解装置の場合には、ルツボの内径が小さ いために真空容器の外部から覗き窓を通して斜め下方にあるルツボ内部を観察し ようとすると、図４に示したように死角Ｂが生じてしまう。 また、覗き窓と、ルツボ内部の溶融状態の監視や種々の補助操作を行う補助操 作機構の軸線が一致していないため、覗き窓から見た対象物に対する遠近感が不 十分となり操作を的確に行うことは困難であり、習熟した運転員の勘に頼る操作 が必要とされ、特に、合金を溶解する場合、一部の合金元素が死角の部分で未溶 融のまま残されたりすると、目的とする組成の合金を得られないなどの欠点があ り改善が望まれていた。 さらに、補助操作をルツボの全周に均一に行うことを優先させるために、補助 操作機構はルツボの中心軸線上部に設置され、このため覗き窓は中心軸線から離 れた位置に設置せざるを得ず、補助操作を行う際は、覗き窓４の外側から斜め下 方のルツボ１ａの内部を観察するように顔面を位置させながら補助操作機構３の 操作棒５を手で操作するといった無理な姿勢を採るのを余儀なくされ、円滑な操 作が困難な状況にあった。 このような点からルツボ内の溶湯の全域を確実に監視し、かつ必要な補助操作 を容易に行うことができ、目的とする成分の金属あるいは合金を得ることの可能 な装置が要望されていた。本考案は、このような要望に合致する覗き窓と補助操 作機構を提供することを課題とする。 The general structure of a normal vacuum melting furnace is as described above, but when the capacity of the induction melting furnace is small, that is, the weight of the raw material to be charged is about 4 kg or less in terms of Fe and the crucible has an inner diameter of 10 cm. In the case of the following small vacuum melting equipment, the inner diameter of the crucible is small, so if you try to observe the inside of the crucible diagonally below from the outside of the vacuum vessel through the viewing window, a blind spot B will occur as shown in Fig. 4. Will end up. In addition, since the axis of the viewing window does not match the axis of the auxiliary operation mechanism that monitors the melting state inside the crucible and performs various auxiliary operations, the perspective of the object seen from the viewing window is insufficient and the operation is appropriate. It is difficult to do so, and an operation that relies on the intuition of a trained operator is required.In particular, when melting an alloy, if some alloy elements remain unmelted in the blind spots, There are drawbacks such as the inability to obtain an alloy with the desired composition, and improvements have been desired. Furthermore, in order to give priority to performing the auxiliary operation uniformly around the entire circumference of the crucible, the auxiliary operation mechanism is installed above the central axis of the crucible, and therefore the sight glass must be installed at a position away from the central axis. When not performing the auxiliary operation, it is impossible to manually operate the operation rod 5 of the auxiliary operation mechanism 3 while locating the face so that the inside of the crucible 1a obliquely downward is observed from the outside of the viewing window 4. I was forced to adopt a posture and it was difficult to operate smoothly. From this point of view, there has been a demand for an apparatus capable of reliably monitoring the entire area of the molten metal in the crucible and easily performing a necessary auxiliary operation, and capable of obtaining a metal or alloy having a desired component. . An object of the present invention is to provide a viewing window and an auxiliary operation mechanism that meet such a demand.
【０００４】[0004]
本考案では、真空容器の頂壁のルツボの中心軸線上に位置する部分を貫通して 上方に突出する中空円筒体を設け、その中間に真空容器内を外気から遮断可能に するバルブを設け、それより上を補助操作室とした。 この補助操作室は、その側壁の上端縁にガラスプレ−トなどの透明な蓋部材を シ−ル機能を有する装着部材を介して装着し、その中心部に貫通穴を設け、操作 棒を挿入して保持するとともに透明な蓋部材に対しシ−ルされた状態で取り付け られる補助操作部材を挿入し固定できるようにした。 これにより、この補助操作部材の外周から上端部の装着部材までの透明な蓋部 材が、半径方向に所定の幅を有する透明な環状の覗き窓とされる。 前記の補助操作室と、補助操作部材と、これらに設けられるシ−ル機構を含め 補助操作機構が構成されるが、前記のガラスプレ−トなどの透明な蓋部材は、補 助操作室の蓋部であるとともに、補助操作部材を取り付け支持するための支持部 材と、覗き窓の機能を兼ねる。 このような構成により、各種の操作棒を覗き窓の中心の貫通穴を通して上下動 と回転可能にして、補助操作機構と覗き窓が一体化した構造にすることにより上 記課題を解決した。 In the present invention, a hollow cylindrical body that protrudes upward through a portion of the top wall of the vacuum container located on the central axis of the crucible is provided, and in the middle thereof, a valve that shuts off the inside of the vacuum container from the outside air is provided. The area above it was designated as the auxiliary operation room. In this auxiliary operation room, a transparent lid member such as a glass plate is mounted on the upper edge of the side wall through a mounting member having a sealing function, a through hole is provided in the center thereof, and an operation rod is inserted therein. It is possible to insert and fix an auxiliary operation member that is attached to the transparent lid member in a sealed state and held. As a result, the transparent lid member from the outer periphery of the auxiliary operation member to the mounting member at the upper end becomes a transparent annular peep window having a predetermined width in the radial direction. The auxiliary operation chamber, the auxiliary operation member, and the auxiliary operation mechanism including the seal mechanism provided therein are configured. The transparent lid member such as the glass plate described above is a cover of the auxiliary operation chamber. It also functions as a viewing window as well as a supporting member for mounting and supporting the auxiliary operation member. With this configuration, various operation rods can be moved vertically and rotated through the through hole in the center of the sight glass, and the auxiliary operation mechanism and the sight window are integrated to solve the above problems.
【０００５】[0005]
ルツボ内の溶湯上部全域の監視、補助操作の確実化および作業姿勢の適正化に よる作業性の改善を図るための補助操作機構と覗き窓を一体化して、真空容器の 頂壁のルツボの中心軸線上の位置に設置させたので以下に示す効果が得られる。 ガラスプレ−トなどによる環状の覗き窓の中心部には、操作棒挿入部、ガラス プレ−トと操作棒間のシ−ル部などがあるが、その外側はリング状に視界の良い 領域があるので、ルツボ内の溶湯上面全域を死角なしに監視でき、また覗きなが ら操作棒を操作して温度測定、ルツボ内の溶融不完全な部分の突き落とし、サン プリングなどの補助作業を確実にかつ容易に行うことが可能になる。 さらに補助操作機構に設けるバルブにより、真空容器本体側と補助操作機構側 を外部の大気に対し雰囲気的に遮断することが可能となり、真空容器内の真空又 は不活性ガス雰囲気を破ることなく補助操作、操作用具の交換および効率的な溶 解作業が可能になる。 The center of the crucible on the top wall of the vacuum vessel is integrated with an auxiliary operation mechanism for monitoring the entire upper part of the melt in the crucible, ensuring auxiliary operation, and improving workability by optimizing the work posture. Since it is installed at the position on the axis, the following effects can be obtained. At the center of the circular viewing window made of glass plate, etc., there is an operation rod insertion part, a seal part between the glass plate and the operation rod, etc., but there is a ring-shaped area with good visibility on the outside. Therefore, the entire upper surface of the melt in the crucible can be monitored without blind spots, and the operating rod can be operated while looking into the crucible to measure the temperature, push down the incompletely melted part in the crucible, and perform auxiliary work such as sampling. It becomes possible to do it easily. In addition, the valve provided in the auxiliary operation mechanism allows the main body side of the vacuum container and the auxiliary operation mechanism side to be shut off from the atmosphere in the atmosphere, so that the vacuum or inert gas atmosphere inside the vacuum container is not broken It enables operations, replacement of operating tools, and efficient melting work.
【０００６】[0006]
図１は、本考案による覗き窓兼補助操作機構１３を備えた真空溶解装置の部分 断面立面図であり、図２は図１の一部拡大図を示し、これらの図中で図４と同じ 部材または部品には同じ符号を付けて示す。 誘導溶解炉１の真空容器２の頂壁２ａ上でルツボ１ａの中心軸線上に位置する 部分に、真空容器２内から頂壁２ａを貫通して容器外まで突出する中空円筒体６ が装着され、この中空円筒体（以下円筒体と略称する）６の突出した部分の中間 にゲ−トバルブＶが配置され、円筒体のこれより上が真空容器に対し遮断または 連通可能にされる補助操作室１６となり、符号１７は補助操作室１６と真空源な どに接続する配管である。 図２において、この円筒体６の側壁６′の上端には、下リング６ｂが側壁６′ に対し直角に溶接などで固定されて所定の幅で半径方向内方に延在する環状のフ ランジを形成し、この下リング６ｂの上面には半径方向内方に低くなる段部６ｃ とＯリングＯ1を収容する溝６ｄが設けられる。 この下リング６ｂの上面に接して、ほぼ同様な構造の上リング７が複数個のボ ルト８で取り付けられ、この上リング７の下面内側には前記の段部６ｃと内径が 同一で半径方向に高くなる段部７ａが設けられ、この段部７ａと前記段部６ｃと の間に環状の空間が形成され、円環形の透明な蓋部材９が挟まれて保持され、蓋 部材９の下面と下リング６ｂの前記段部６ｃの前記の溝６ｄとの間にＯリングＯ 1 が配置される。 FIG. 1 is a partial cross-sectional elevation view of a vacuum melting apparatus having a viewing window and auxiliary operation mechanism 13 according to the present invention, and FIG. 2 is a partially enlarged view of FIG. The same members or parts are designated by the same reference numerals. A hollow cylindrical body 6 protruding from the inside of the vacuum container 2 through the top wall 2a to the outside of the container is attached to a portion of the induction melting furnace 1 on the top wall 2a of the vacuum container 2 located on the central axis of the crucible 1a. A gate valve V is arranged in the middle of the projecting portion of the hollow cylindrical body (hereinafter abbreviated as "cylindrical body") 6, and an upper part of the cylindrical body is cut off or can communicate with the vacuum container. 16 is a pipe for connecting the auxiliary operation chamber 16 to a vacuum source or the like. In FIG. 2, the lower ring 6b is fixed to the upper end of the side wall 6'of the cylindrical body 6 by welding or the like at a right angle to the side wall 6'and extends radially inward with a predetermined width. On the upper surface of the lower ring 6b, and the step portion 6c and the O-ring O are lowered inward in the radial direction.1A groove 6d for accommodating the is provided. An upper ring 7 having substantially the same structure is attached to the upper surface of the lower ring 6b by a plurality of bolts 8. The inner surface of the upper ring 7 has the same inner diameter as that of the stepped portion 6c and has a radial direction. Is provided with a stepped portion 7a which becomes higher, and an annular space is formed between the stepped portion 7a and the stepped portion 6c, and an annular transparent lid member 9 is sandwiched and held, and a lower surface of the lid member 9 is held. And an O-ring O between the step 6c of the lower ring 6b and the groove 6d. 1 Are placed.
【０００７】 一方、環状の蓋部材９の中心穴９ａには、中間にフランジ１０ｃを有し、断面 が十字形のユニオン継手状の保持金具１０が、中間のフランジ１０ｃの下面を前 記の蓋部材９の上面との当接面として嵌め込まれる。 前記の保持金具１０は、さらに前記のフランジ１０ｃの下面より下の首下部１ ０ａとフランジ１０ｃより上の頭部１０ｂとを有し、この頭部にはその上端から 下方に明けられた凹部１０ｅを有し、この凹部１０ｅの内周と挿入された操作棒 ５の外周間はＯリングを挿入するための所定の寸法の隙間にされている。 一方、前記の首下部１０ａの下端からは前記の凹部１０ｅに連通し凹部１０ｅ よりは内径が小さく後述する操作棒５の挿入と抜き出しが可能な内径を有する貫 通穴１０ｄが明けられ、前記の頭部１０ｂと首下部１０ａの外周には、ねじが切 られて、それぞれが後述するナット１１と袋ナット１２が外嵌される。 ナット１１は前記保持金具１０の首下部１０ａの外周のねじに係合するねじ穴 １１ａが明けられ、一方、袋ナット１２には、その下面から上面の手前までの深 さで、前記頭部１０ｂの外周のねじに係合するねじが切られた中心穴１２ｅが明 けられ、上面の中央部には前記保持金具１０と同軸で中心穴１２ｅまで達し操作 棒５を挿入するための貫通穴１２ａが明けられている。 これらの保持金具１０、ナット１１、袋ナット１２、操作棒５および２個のＯ リングとで補助操作部材が構成される。On the other hand, in the central hole 9a of the annular lid member 9, there is a flange 10c in the middle, and a holding metal fitting 10 in the shape of a union joint having a cross-shaped cross section is provided on the lower surface of the intermediate flange 10c. It is fitted as a contact surface with the upper surface of the member 9. The holding metal fitting 10 further has a neck lower portion 10a below the lower surface of the flange 10c and a head portion 10b above the flange 10c, and this head portion has a recess 10e opened downward from the upper end thereof. There is a gap between the inner periphery of the recess 10e and the outer periphery of the inserted operation rod 5 having a predetermined size for inserting the O-ring. On the other hand, from the lower end of the lower neck portion 10a, a through hole 10d communicating with the recess 10e and having an inner diameter smaller than that of the recess 10e and having an inner diameter for allowing the operation rod 5 to be inserted and withdrawn is formed. Screws are cut on the outer circumferences of the head portion 10b and the neck lower portion 10a, and a nut 11 and a cap nut 12, which will be described later, are fitted on the outer periphery of the head portion 10b and the neck lower portion 10a, respectively. The nut 11 is provided with a screw hole 11a that engages with a screw on the outer periphery of the neck lower portion 10a of the holding metal fitting 10, while the cap nut 12 has a depth from the lower surface to the upper surface of the head nut 10b. A threaded central hole 12e that engages with a screw on the outer periphery of the through hole 12a is formed in the center of the upper surface so as to reach the central hole 12e coaxially with the holding metal fitting 10 and to insert the operating rod 5 into the through hole 12a. Is open. The holding metal fitting 10, the nut 11, the cap nut 12, the operating rod 5 and the two O-rings constitute an auxiliary operating member.
【０００８】 保持金具１０の前記の中間のフランジ１０ｃの上面と蓋部材９の下面との間に はＯリングＯ2が挿入され、保持金具１０の頭部１０ｂと、この外周にねじ係合 する袋ナット１２と操作棒５との間には図で上から順にカラ−１４、ＯリングＯ 3 、カラ−１５およびＯリングＯ3が配置されている。 このようにして、円筒体６の側壁６′と、上、下リング７、６ｂと、蓋部材９ と、保持金具１０及びナット１１と袋ナット１２と、保持金具１０の中心部に着 脱可能に挿入される操作棒５との間が外気に対し遮断された補助操作室１６とな り、この補助操作室１６と、操作棒を挿入し透明な蓋部材９に取り付けられる補 助操作部材とで補助操作機構１３を構成し、補助操作室１６と真空容器２から突 出した中空円筒体６の下部との間には、バルブＶが配置され補助操作室１６から 真空容器内への外部空気の流入を完全に遮断する。An O-ring O is provided between the upper surface of the intermediate flange 10 c of the holding metal fitting 10 and the lower surface of the lid member 9.2Between the head 10b of the holding metal fitting 10 and the cap nut 12 and the operating rod 5 which are screw-engaged with the outer periphery of the holding metal fitting 10 in this order from the top in the figure to the collar 14 and the O-ring O. 3 , Color-15 and O-ring O3Are arranged. In this way, the side wall 6 ′ of the cylindrical body 6, the upper and lower rings 7, 6 b, the lid member 9, the holding metal fitting 10, the nut 11, the cap nut 12, and the central portion of the holding metal fitting 10 can be attached and detached. An auxiliary operating chamber 16 is provided between the operating rod 5 and the operating rod 5, which is cut off from the outside air. The auxiliary operating chamber 16 and an auxiliary operating member that is inserted into the transparent lid member 9 are attached to the auxiliary operating chamber 16. The auxiliary operation mechanism 13 is constituted by a valve V is arranged between the auxiliary operation chamber 16 and the lower portion of the hollow cylindrical body 6 protruding from the vacuum container 2, and external air from the auxiliary operation chamber 16 into the vacuum container is provided. Completely shut off the inflow of.
【０００９】 この袋ナット１２の外周から蓋部材９の外周を保持する下リング６ｂの内周ま での間のリング状の部分が覗き窓４ａになるが、この覗き窓４ａの半径方向の幅 は、覗き窓としての視界が十分になるように設定されている。 なお、図３の（Ａ）、（Ｂ）、（Ｃ）は各種補助用具の先端の部分を示し、そ れぞれ、操作棒の先端に交換可能な先端部５ａを有する突き棒５、支持棒の先端 付近に溶湯を取り入れるための穴５ｃを備えた先端部５ｄを有するサンプリング 棒５ｂ、支持棒として中空で内部に補償導線５ｆを備え、先端部５ｇに消耗式ラ ンス熱電対５ｈを有する温度測定棒５ｅを示す。The ring-shaped portion between the outer circumference of the cap nut 12 and the inner circumference of the lower ring 6b that holds the outer circumference of the lid member 9 becomes the observation window 4a. Is set to have a sufficient view as a viewing window. 3 (A), (B), and (C) show the tip portions of various auxiliary tools, and the tip rod 5 having a replaceable tip portion 5a at the tip of the operating rod and the support Sampling rod 5b having a tip 5d with a hole 5c for taking in the molten metal near the tip of the rod, hollow compensating lead 5f as a support rod, and consumable lance thermocouple 5h at tip 5g. The temperature measuring rod 5e is shown.
【００１０】 次に本考案による覗き窓兼用補助操作機構の操作について説明する。 図１および図２に示したように、覗き窓４ａは、真空容器２の頂壁上で、ルツ ボ１ａのほぼ中心軸線上にあり、蓋部材９の中心部には視界を遮ると考えられる ものとして、操作棒５を含む補助操作部材の上部の袋ナット１２があるが、この 袋ナット１２のすぐ外側は半径方向の幅が視界を遮らないように設定されたリン グ状の透明な蓋部材９であるため、ルツボ１ａ内部の溶湯上面を死角なしに楽な 姿勢でかつ状況を把握しながら全体的に監視しながら補助操作することができる 。 透明な蓋部材９と補助操作室１６の外周縁との間にはＯリングＯ1が配置され 、操作棒５を保持する保持金具１０のフランジ１０ｃの下面と蓋部材９の上面と の間にはＯリングＯ2が、また保持金具１０の頭部１０ｂのねじが切られた中心 穴１２ｅと操作棒５との間にはＯリングＯ3が、それぞれ配置されて外部の空気 がリング補助操作室１６内に流入するのが防止される。 さらに補助用具の交換は、補助用具をバルブＶの上部にある補助操作室１６内 に一度引き上げ、バルブＶを閉じて補助操作室１６を開放し、補助用具の交換あ るいはサンプル取り出しなどを行った後、補助操作室１６を閉鎖して真空容器と は別系統の配管１７を通して補助操作室１６を減圧し、真空状態でバルブＶを開 け、補助用具を下方に下げ作業を続行することができる。 これによって、真空容器内の雰囲気を変えることなく半連続的に各種の作業を 行うことができる。Next, the operation of the auxiliary operating mechanism that also serves as the viewing window according to the present invention will be described. As shown in FIGS. 1 and 2, the observation window 4a is considered to be on the top wall of the vacuum container 2 and substantially on the central axis of the crucible 1a, and obstruct the view at the center of the lid member 9. There is a cap nut 12 on the upper part of the auxiliary operation member including the operation rod 5, and the ring-shaped transparent lid immediately outside the cap nut 12 is set so that the radial width does not obstruct the view. Since it is the member 9, it is possible to perform an auxiliary operation on the upper surface of the molten metal inside the crucible 1a in a comfortable posture without blind spots and while monitoring the entire situation while grasping the situation. An O-ring O 1 is arranged between the transparent lid member 9 and the outer peripheral edge of the auxiliary operation chamber 16, and between the lower surface of the flange 10c of the holding metal fitting 10 for holding the operation rod 5 and the upper surface of the lid member 9. Is an O-ring O 2 , and an O-ring O 3 is arranged between the threaded center hole 12e of the head 10b of the holding metal fitting 10 and the operating rod 5 so that the outside air is operated as a ring auxiliary operation. Inflow into the chamber 16 is prevented. Furthermore, when exchanging the auxiliary equipment, the auxiliary equipment is once pulled up into the auxiliary operation chamber 16 above the valve V, the valve V is closed to open the auxiliary operation chamber 16, and the auxiliary equipment is replaced or the sample is taken out. After that, the auxiliary operation chamber 16 is closed, the auxiliary operation chamber 16 is decompressed through a pipe 17 of a system different from the vacuum container, the valve V is opened in a vacuum state, and the auxiliary tool is lowered downward to continue the work. it can. As a result, various operations can be performed semi-continuously without changing the atmosphere in the vacuum container.
【００１１】[0011]
上記のように補助操作機構と覗き窓を一体化しルツボの中心軸上部に設置し、 また補助操作室を設け、これと真空容器本体との間にバルブを設けることにより 、小型の真空溶解装置において、ルツボ内の挿入した原料と溶湯の状態を確実に 観察、監視できると共に、各種補助操作を容易に、確実にさらに安全に行うこと ができる。 As described above, the auxiliary operation mechanism and the viewing window are integrated and installed above the center axis of the crucible, and an auxiliary operation chamber is provided, and a valve is provided between the auxiliary operation chamber and the main body of the vacuum container, so that a small vacuum melting apparatus can be used. In addition, it is possible to reliably observe and monitor the state of the inserted raw material and molten metal in the crucible, and it is possible to perform various auxiliary operations easily, reliably, and safely.
【図１】本考案による覗き窓兼用補助操作機構を備えた
真空溶解装置の断面部分立面図である。FIG. 1 is a sectional partial elevational view of a vacuum melting apparatus having an auxiliary operating mechanism that also serves as a viewing window according to the present invention.
【図２】図１のＡ部を拡大し、それより下部を破断して
示した断面立面図である。FIG. 2 is a sectional elevational view showing an enlarged part A of FIG. 1 with a lower part cut away.
【図３】本図の（Ａ）は突き棒の部分立面図である。本
図の（Ｂ）はサンプリング棒の部分立面図である。本図
の（Ｃ）は温度測定棒の部分立面図である。FIG. 3A is a partial elevational view of a thrust rod. (B) of this figure is a partial elevation view of the sampling rod. (C) of this figure is a partial elevation view of the temperature measuring rod.
【図４】 従来の補助操作機構と覗き窓を備えた真空溶
解装置の断面部分立面図である。FIG. 4 is a partial sectional elevational view of a vacuum melting apparatus including a conventional auxiliary operation mechanism and a viewing window.
１ 誘導溶解炉 １ａ ルツボ ２ 真空容器 ２ａ 頂壁 ４ａ 覗き窓 ５、５ｂ、５ｅ 操作棒 ５ａ、５ｄ、５ｇ 操作棒の先端部 ６ 中空円筒体 ６ｂ 下リング ７ 上リング ９ 蓋部材 ９ａ 蓋部材の中心穴 １０ 保持金具 １３ 補助操作機構 １６ 補助操作室 Ｏ1、Ｏ2、Ｏ3 Ｏリング Ｖ バルブ1 induction melting furnace 1a crucible 2 vacuum vessel 2a top wall 4a viewing window 5, 5b, 5e operating rods 5a, 5d, 5g tip of operating rod 6 hollow cylinder 6b lower ring 7 upper ring 9 lid member 9a center of lid member Hole 10 Holding bracket 13 Auxiliary operation mechanism 16 Auxiliary operation room O 1 , O 2 , O 3 O ring V valve
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ２７Ｄ 21/02 7141−4Ｋ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display area F27D 21/02 7141-4K
Claims (3)
空容器と、この真空容器内に配置され被溶解材料を溶解
して溶湯を保持するルツボを含んで成る少容量の誘導溶
解炉と、前記真空容器の上部に設けられルツボ内の被溶
解材料の溶融状態を監視するためのガラスなどの透明体
の覗き窓と、ルツボ内の被溶解材料の溶融を阻害する棚
吊りなどを防止する突き棒、溶湯の試料を採取するサン
プリング棒、溶湯温度を測定する温度測定棒などの補助
操作端と、これらの補助操作端を先端に取り付けてルツ
ボ内に挿入し操作する操作棒と、この操作棒を支持する
補助操作部材とを有する真空溶解装置において：前記真
空容器は、その上壁の貫通穴を通過して上方に気密に保
たれて突出し、この突出した部分の中間に前記真空容器
内の雰囲気に対し開閉されるバルブが配置されて、それ
より上の部分の内部が補助操作室とされる中空円筒体
と、 前記補助操作室の側壁の上端の外縁において外部に対し
シ−ルする装着部材を介して装着され中心部に貫通穴を
有しガラスなどの透明体製の蓋部材とを有し、 この蓋部材に対し、前記補助操作機構はこの中心穴に挿
入され、さらにその中心部に前記操作棒が挿入される貫
通穴を有し、操作棒との間にもシ−ル部材が配置された
構造とされ、前記蓋部材の前記補助操作部材の外周から
前記側壁上端の外縁の装着部材までの間の環状の透明部
が前記覗き窓を形成してルツボ内の溶湯の溶融状態を正
確に把握した状態で補助操作が可能にされることを特徴
とする覗き窓を兼ねた補助操作機構を有する真空溶解装
置。1. A small capacity induction melting furnace comprising: a vacuum container held in a vacuum or an inert atmosphere; and a crucible arranged in the vacuum container to hold a molten metal by melting a material to be melted; A viewing window made of a transparent material such as glass provided on the upper part of the vacuum container to monitor the melting state of the material to be melted in the crucible, and a spigot to prevent hanging from a shelf that prevents melting of the material to be melted in the crucible. , Auxiliary operation ends such as a sampling rod for collecting a sample of molten metal, a temperature measurement rod for measuring the temperature of the molten metal, and an operating rod for attaching these auxiliary operation ends to the tip and inserting them into the crucible and operating this operating rod. In a vacuum melting apparatus having an auxiliary operating member for supporting: the vacuum vessel passes through a through hole in an upper wall thereof and is kept airtightly upward to project, and an atmosphere in the vacuum vessel is provided in the middle of the projecting portion. Open against A hollow cylinder is provided in which a valve to be closed is arranged, and the inside of the portion above it serves as an auxiliary operation chamber, and a mounting member that seals to the outside at the outer edge of the upper end of the side wall of the auxiliary operation chamber. And a lid member made of a transparent material such as glass and having a through hole in the center, and the auxiliary operation mechanism is inserted into the center hole with respect to the lid member. It has a through hole into which a rod is inserted, and a seal member is also arranged between the rod and the operating rod, from the outer periphery of the auxiliary operating member of the lid member to the mounting member at the outer edge of the side wall upper end. An auxiliary operation mechanism that doubles as a peep window is characterized in that the annular transparent portion between the peek windows forms the peep window and the auxiliary operation is enabled in a state in which the molten state of the molten metal in the crucible is accurately grasped. Vacuum melting device having.
明体の蓋部材を装着する装着部材は、前記円筒体の上端
縁に被着され、半径方向内方に所定の幅を有して内方に
延び、半径方向内方に低くなる段部と、Ｏリング溝とが
設けられた下リングと、この下リングの上面に固着され
半径方向内方に高くなる段部を有する上リングとを有
し、前記透明体の蓋部材は、その周縁が前記上、下リン
グの両段部の間に画定される隙間に挿入され、その下面
が前記下リングの前記のＯリング溝内のＯリングに密接
してシ−ル可能に配置されることを特徴とする覗き窓を
兼ねた補助操作機構を有する真空溶解装置。2. The vacuum melting apparatus according to claim 1, wherein a mounting member for mounting a transparent lid member such as the glass at an outer edge of a side wall upper end portion of the auxiliary operation chamber is attached to an upper edge of the cylindrical body. And a lower ring provided with an O-ring groove and a step portion that extends inward with a predetermined width inward in the radial direction and is lowered inward in the radial direction, and is fixed to the upper surface of the lower ring. An upper ring having a step portion that rises inward in the radial direction, and the lid member of the transparent body is inserted into a gap defined by the peripheral edges of the upper and lower rings, A vacuum melting apparatus having an auxiliary operating mechanism also serving as a viewing window, wherein a lower surface of the lower ring is arranged in close contact with an O-ring in the O-ring groove of the lower ring so as to be able to be sealed.
おいて、 前記補助操作室の上端周縁に装着された透明体の蓋部材
の中心部に挿入される補助操作部材は、軸方向のほぼ中
間部に前記蓋部材に平行に設けられその下面に少なくと
も１個のＯリングを有して前記蓋部材の上面の内方部に
接触するフランジ部と、このフランジ部の下面から直角
に垂下して前記補助操作室内に挿入され外周にねじが切
られた首下部と、前記フランジの上面から直角に立ち上
がり外周にねじが切られ、その内部に前記貫通穴内に挿
入される操作棒との間にＯリングが挿入される隙間を有
する凹部が明けられた頭部と、前記首下部の下端から前
記頭部の凹部に達し前記補助操作棒を挿入するための軸
線方向の貫通穴とを有する保持金具と、 この保持金具の前記首下部のねじに係合する雌ねじが切
られた貫通穴を有し前記保持金具のフランジの下面との
間に前記蓋部材を挟んで締め付けるナットと、 前記保持金具の頭部の外周にねじ係合されてその上端を
覆う袋ナットとして軸心から所定の半径で頂面との間に
所定厚さの部分を残して明けられ内周に前記保持金具の
前記頭部の外周のねじ部と係合する雌ねじが切られた凹
部と、頂面の中心部からこの凹部まで貫通して明けられ
前記操作棒が挿入される貫通穴が明けられた袋ナットと
を含んで成り、 前記保持金具の前記フランジの下面の所定の位置にＯリ
ングが挿入され、前記保持金具の首下部が補助操作室内
に挿入され、その上下部が、それぞれ前記の袋ナットと
ナットとで締め付けられた状態で前記操作棒が取り出し
可能に挿入されることを特徴とする覗き窓を兼ねた補助
操作機構を有する真空溶解装置。3. The vacuum melting apparatus according to claim 1, wherein the auxiliary operation member inserted in the center of the lid member of the transparent body mounted on the upper edge of the auxiliary operation chamber has a substantially middle portion in the axial direction. A flange portion that is provided in parallel with the lid member and has at least one O-ring on the lower surface thereof and that contacts the inward portion of the upper surface of the lid member; Between the lower neck part, which is inserted into the auxiliary operation chamber and is threaded on the outer periphery, and which rises at a right angle from the upper surface of the flange and is threaded on the outer periphery, and which is inserted into the through hole, is inserted into the through hole. A holding metal fitting having a head portion having a recessed portion having a gap for inserting a ring, and an axial through hole for reaching the recessed portion of the head portion from the lower end of the lower neck portion and inserting the auxiliary operation rod. , Under the neck of this retaining bracket And a nut having a through hole in which a female thread for engaging the screw of the holding metal fitting is cut, and the lid member is clamped between the nut and the lower surface of the flange of the holding metal fitting, and screwed to the outer periphery of the head of the holding metal fitting. As a cap nut that covers the upper end of the holding metal fitting, it is opened from the shaft center with a predetermined radius and leaving a portion of a predetermined thickness between the top surface and the inner surface to engage with the threaded portion of the outer circumference of the head of the holding metal fitting. A recess having an internal thread cut therein, and a cap nut having a through hole for penetrating from the center of the top surface to the recess and inserting the operation rod, the flange of the holding metal fitting The O-ring is inserted at a predetermined position on the lower surface, the lower part of the neck of the holding metal fitting is inserted into the auxiliary operation chamber, and the operation rod is taken out with its upper and lower parts fastened by the cap nut and the nut, respectively. Characterized by being inserted as much as possible Vacuum melting device with an auxiliary operation mechanism that doubles as a viewing window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993053333U JP2596763Y2 (en) | 1993-09-08 | 1993-09-08 | Vacuum melting device with auxiliary operation mechanism also serving as viewing window |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993053333U JP2596763Y2 (en) | 1993-09-08 | 1993-09-08 | Vacuum melting device with auxiliary operation mechanism also serving as viewing window |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0722397U true JPH0722397U (en) | 1995-04-21 |
| JP2596763Y2 JP2596763Y2 (en) | 1999-06-21 |
Family
ID=12939820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1993053333U Expired - Fee Related JP2596763Y2 (en) | 1993-09-08 | 1993-09-08 | Vacuum melting device with auxiliary operation mechanism also serving as viewing window |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2596763Y2 (en) |
-
1993
- 1993-09-08 JP JP1993053333U patent/JP2596763Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2596763Y2 (en) | 1999-06-21 |
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