JPH0649549A - Treatment of metallic sodium-containing engine valve - Google Patents
Treatment of metallic sodium-containing engine valveInfo
- Publication number
- JPH0649549A JPH0649549A JP20466292A JP20466292A JPH0649549A JP H0649549 A JPH0649549 A JP H0649549A JP 20466292 A JP20466292 A JP 20466292A JP 20466292 A JP20466292 A JP 20466292A JP H0649549 A JPH0649549 A JP H0649549A
- Authority
- JP
- Japan
- Prior art keywords
- engine valve
- metal
- sodium
- water
- valve
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/12—Cooling of valves
- F01L3/14—Cooling of valves by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は例えば内燃機関用のエン
ジンバルブとして用いる金属ナトリウム入エンジンバル
ブの処理方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of treating an engine valve containing sodium metal which is used as an engine valve for an internal combustion engine.
【０００２】[0002]
【従来の技術】近年、自動車用エンジンは、法的規制
（例えばＣＡＦＥ規制など）を受けて、増々高効率化、
低燃費化、軽量化、低騒音化が加速されており、その結
果、エンジンバルブに対しても希薄燃焼に伴う高温化と
多弁化、軽量化要求が苛酷になってきた。2. Description of the Related Art In recent years, automobile engines have been subject to legal regulations (for example, CAFE regulations) and have been improved in efficiency.
Fuel consumption, weight reduction, and noise reduction are being accelerated, and as a result, engine valves are becoming increasingly demanded for higher temperatures, more valves, and lighter weight due to lean combustion.
【０００３】その技術的解決手段の中で、最も有力な手
法の１つに挙げられるのが、金属ナトリウム入中空エン
ジンバルブである。即ち図５に示す様に、金属ナトリウ
ム入エンジンバルブ１０はバルブ本体１１の内部を中空
化することにより、軽量化を図り、運動エネルギーロス
低減による低燃費化及び着座音低減による低騒音化を図
ると共に、更には、低比重、低融点、高熱伝達率の特性
を有する金属ナトリウム（以下「金属Ｎａ」と記す）１
２を封入することで、高熱伝達率化を図り、燃焼ガスの
高温化に対応できる。Among the technical solutions, one of the most influential methods is a hollow engine valve containing metal sodium. That is, as shown in FIG. 5, the metallic sodium-containing engine valve 10 is made lightweight by hollowing the inside of the valve body 11 to reduce fuel consumption by reducing kinetic energy loss and noise by reducing seating noise. In addition, sodium metal (hereinafter referred to as "metal Na") having characteristics of low specific gravity, low melting point, and high heat transfer coefficient 1
By enclosing 2, the heat transfer coefficient can be increased and the temperature of the combustion gas can be increased.
【０００４】一方、金属Ｎａ入エンジンバルブ１０は、
高級車を中心に漸増中で、多弁化と相まって中級車にも
普及しつつある。金属Ｎａは極めて活性な金属で危険で
あるため、工場生産段階では、厳重な管理の下に充填が
行われているが、最終ユーザーに手渡した後、車検、定
検時の修理工場や、廃車の解体工場で、従来の中実バル
ブと混在して廃部・切断され、特に、水と接触すると、
発熱、溶融、水素ガス発生に伴う爆発、苛性ソーダ生成
に伴う強力アルカリ水の生成等により、火傷、皮膚障
害、目に入れば失明等重大災害を誘発する。On the other hand, the engine valve 10 containing metal Na is
It is gradually increasing mainly in high-end cars, and along with the increase in the number of valves, it is also becoming popular in middle-class cars. Since metal Na is an extremely active metal and is dangerous, it is filled under strict control at the factory production stage, but after being handed over to the final user, it is inspected and repaired at regular inspections, and scrapped vehicles. At the dismantling factory of, it is mixed with the conventional solid valve and discarded / cut, especially when it comes into contact with water,
Due to heat generation, melting, explosion due to hydrogen gas generation, generation of strong alkaline water due to caustic soda generation, etc., serious accidents such as burns, skin damage, and blindness in eyes are induced.
【０００５】そこで従来の金属Ｎａ入エンジンバルブの
処理法としては、明らかに金属Ｎａ入エンジンバルブの
みを分別収集した後、図６に示すように、金属Ｎａ入エ
ンジンバルブをグラインダカッタ、鋸等で慎重に乾式切
断した後、水１０１を充満した容器１０２内に投入し、
金属Ｎａが次式により、水と反応して、ＮａＯＨ水とＨ
2 ガス１０３を発生させ、反応が終了した時点でＮａの
なくなった中空のバルブ本体１１を取出し、塩酸水溶液
（ＨＣｌ）を滴下して中和した後、排水している。Therefore, as a conventional method of treating a metal Na-containing engine valve, after clearly collecting only the metal Na-containing engine valve, as shown in FIG. 6, the metal Na-containing engine valve is treated with a grinder cutter, a saw or the like. After carefully dry cutting, put in a container 102 filled with water 101,
Metal Na reacts with water according to the following formula, and NaOH water and H
2 Gas 103 is generated, and when the reaction is completed, the hollow valve body 11 free of Na is taken out, and a hydrochloric acid aqueous solution (HCl) is dropped to neutralize it, and then drained.
【０００６】[0006]
【化１】 [Chemical 1]
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、前述し
た従来の金属Ｎａ入エンジンバルブには、以下に述べる
ような問題点がある。Ｉ．水中処理する前に１本ずつ切
断を行うことにより、 １）作業能率が悪い。 ２）切断熱によりＮａが発火する。 ３）切断時に飛散した金属Ｎａ微粉及び大気と反応生成
したＮａ2Ｏ微粉は、次式に示すように、目に入ると涙
（Ｈ2Ｏ）と反応して水酸化ナトリウム（ＮａＯＨ）と
なり、目に炎症を起こす。However, the above-mentioned conventional metal Na-containing engine valve has the following problems. I. By cutting one by one before underwater treatment, 1) work efficiency is poor. 2) Na is ignited by the heat of cutting. 3) Metal Na fine powder scattered at the time of cutting and Na 2 O fine powder generated by reaction with the atmosphere react with tears (H 2 O) and become sodium hydroxide (NaOH) as shown in the following formula, Causes eye irritation.
【化２】 ＩＩ．水中投入処理を行うため、 ４）激しくＨ2 ガスを発生することとなり、火気がある
と引火し、換気の悪い密室で処理すると爆発の危険があ
る。 ５）バルブから流出したＮａは、比重が水よりも小さい
ため水面に浮上し、水面上で躍り、赤熱溶融金属とな
り、自ら発生したＨ2 を溶融金属が吸収し、引火・自爆
飛散するため、容器から数メートル離れて処理する必要
がある。[Chemical 2] II. To perform a water-on processing, 4) vigorously becomes possible to generate a H 2 gas, ignited and there is fire, there is a risk of explosion treating bad backroom ventilated. 5) Na flowing out of the valve floats on the surface of water because it has a smaller specific gravity than water, jumps on the surface of water, becomes red-hot molten metal, and the molten metal absorbs H 2 generated by itself, causing it to ignite and fly away. It needs to be processed several meters away from the container.
【０００８】[0008]
【課題を解決するための手段】前記課題を解決する本発
明に係る金属ナトリウム入エンジンバルブの処理方法
は、金属ナトリウムを内部に有するエンジンバルブの処
理方法において、金属ナトリウム入エンジンバルブを加
熱溶解手段により直接融解することを特徴とする。A method of treating a metal sodium-containing engine valve according to the present invention which solves the above-mentioned problems is a method for treating an engine valve having metal sodium therein, which comprises heating and melting the metal sodium-containing engine valve. It is characterized by being directly melted by.
【０００９】また、上述のように融解した金属ナトリウ
ムを酸化させて酸化ナトリウムとした後、水と反応させ
て水酸化ナトリウム水溶液とすると共に、酸で中和する
ことを特徴とする。Further, as described above, the molten metal sodium is oxidized into sodium oxide, which is then reacted with water to form an aqueous sodium hydroxide solution and neutralized with an acid.
【００１０】以下、本発明の内容を詳細に説明する。The contents of the present invention will be described in detail below.
【００１１】本発明においては金属Ｎａ入エンジンバル
ブを従来のように切断することなくそのままの状態で直
接融解するもので、その加熱融解手段としては、例えば
高周波数溶解法、エレクトロスラグ溶解法、アーク溶解
法及び抵抗加熱溶解法を挙げることができる。In the present invention, the metal Na-containing engine valve is directly melted in the state as it is without being cut as in the conventional case, and its heating and melting means is, for example, a high frequency melting method, an electroslag melting method, an arc. A melting method and a resistance heating melting method can be mentioned.
【００１２】上記溶融によって流出する液体金属Ｎａ
（融点９８℃）及び蒸発、気化した金属蒸気Ｎａ（沸点
８８３℃）は、大気中の酸素と反応して、夫々Ｎａ2Ｏ
塊、及びＮａ2Ｏ粉塵（ヒューム）となる。この内のヒ
ュームについては例えば集塵器で吸引する。Liquid metal Na flowing out by the above melting
(Melting point 98 ° C.) and vaporized and vaporized metal vapor Na (boiling point 883 ° C.) react with oxygen in the atmosphere to form Na 2 O, respectively.
It becomes a lump and Na 2 O dust (fumes). The fumes contained therein are sucked by a dust collector, for example.
【００１３】上記得られたＮａ2Ｏ塊及び吸引されたＮ
ａ2Ｏ粉塵は、水を溜めた所定容器内に吸収し、次いで
酸性液を滴下すると共にｐＨ計を用いて確認しつつ中和
し、その後排水するようにしている。The Na 2 O mass obtained above and the aspirated N 2
The a 2 O dust is absorbed in a predetermined container in which water is stored, and then an acidic liquid is dropped and neutralized while confirming with a pH meter, and then drained.
【００１４】尚、金属Ｎａを入れていたバルブ本体は溶
融により金属塊とし、スクラップ材として処理すればよ
い。また、このバルブ本体は金属ナトリウムのコンテナ
の役割をすることとなる。It should be noted that the valve body containing the metal Na may be melted to form a metal block and treated as a scrap material. Also, the valve body will act as a container for metallic sodium.
【００１５】次に金属ナトリウム入エンジンバルブの処
理方法の工程の一例を説明する。Next, an example of the steps of the method for treating an engine valve containing sodium metal will be described.
【００１６】１）金属Ｎａ入エンジンバルブを切断する
ことなく処理容器内に直接投入し、加熱融解手段により
直接バルブ本体ごと融解する。1) A metal Na-containing engine valve is directly charged into a processing container without being cut, and the entire valve body is directly melted by a heating and melting means.
【００１７】２）この融解により、金属Ｎａは大気中の
酸素と反応して次式のようにＮａ2Ｏを生成する。2) By this melting, metallic Na reacts with oxygen in the atmosphere to produce Na 2 O as shown in the following formula.
【化３】 このため、水と反応する場合のように危険な水素ガスを
発生せず、爆発の危惧が全くない。[Chemical 3] Therefore, unlike the case of reacting with water, no dangerous hydrogen gas is generated, and there is no danger of explosion.
【００１８】また、Ｎａ2Ｏヒュームは湿度が高いと湿
気を吸って次式のように水酸化ナトリウムとなり、皮膚
や目に有害となるが、例えば集塵器を用いてＮａ2Ｏヒ
ュームを吸引することで、大気中への飛散を防止でき
る。When the humidity is high, Na 2 O fume absorbs moisture and becomes sodium hydroxide as shown in the following formula, which is harmful to the skin and eyes. For example, a Na 2 O fume is sucked in using a dust collector. By doing so, scattering into the atmosphere can be prevented.
【化４】 [Chemical 4]
【００１９】３）次いで、融解が進むと、バルブ本体を
丸ごと熱的融解しているので、比重差により、溶融金属
と溶融Ｎａ及び酸化生成したＮａ2Ｏとが分離される
（例えば、るつぼ溶融の場合）。3) Then, as the melting progresses, the entire valve body is thermally melted, so that the molten metal is separated from the molten Na and the oxidized Na 2 O due to the difference in specific gravity (for example, melting in the crucible). in the case of).
【００２０】４）溶融凝固したバルブ金属塊（Ｎａ2Ｏ
が付着している）やＮａ2Ｏ塊及び集塵されたＮａ2Ｏ粉
塵を容器水に収納することにより、苛性ソーダ水に変換
した後、塩酸水等の滴下により、中和させることによ
り、無害な塩水となる。4) Melt-solidified valve metal mass (Na 2 O
It is harmless by storing Na 2 O lumps and Na 2 O dust collected in container water into caustic soda water, and then neutralizing it by dropping hydrochloric acid water etc. It becomes salt water.
【化５】 [Chemical 5]
【００２１】[0021]
【実施例】以下、本発明の好適な実施例を図面を参照し
て説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.
【００２２】実施例１（高周波溶解法を用いた場合） 図１は本実施例に係る金属Ｎａ入エンジンバルブ処理の
概略を示す。 Example 1 (When the High Frequency Melting Method is Used) FIG. 1 shows an outline of the process for treating a metallic Na-containing engine valve according to this example.
【００２３】同図に示すように、高周波トランス２１の
２次側に結線された高周波加熱コイル２２の内部に設け
たるつぼ（例、グラファイト製）２３内に未切断の金属
Ｎａ入エンジンバルブ１０を投入し、電源スイッチ２４
をＯＮし、渦電流効果によりバルブを加熱融解する。As shown in the figure, an uncut metal Na-containing engine valve 10 is placed in a crucible (eg, graphite) 23 provided inside a high-frequency heating coil 22 connected to the secondary side of a high-frequency transformer 21. Turn on the power switch 24
Is turned on, and the valve is heated and melted by the eddy current effect.
【００２４】溶けたバルブ材は、金属溶融２５となり、
比重差から下層を形成し、溶けたＮａは大気中の酸素と
反応して、Ｎａ2Ｏスラグ２６となり、上層を形成す
る。The melted valve material becomes a metal melt 25,
The lower layer is formed from the difference in specific gravity, and the melted Na reacts with oxygen in the atmosphere to form Na 2 O slag 26, forming the upper layer.
【００２５】未切断バルブを順次投入すれば、上下層の
溶湯により、金属Ｎａ入エンジンバルブの融解が継続す
る。所定量融解後、冷却し、Ｎａ2Ｏ塊及び金属塊を別
容器の水槽に投入し、生成したアルカリ液をｐＨ計に従
い塩酸液を滴下して、中和水にした後排水する。なお、
バルブ融解初期に生成するＮａ2Ｏヒュームは、るつぼ
上部に設けた集塵器（不記載）で吸引する。If the uncut valves are sequentially turned on, the metal Na-containing engine valve continues to be melted by the molten metal in the upper and lower layers. After melting a predetermined amount, it is cooled and the Na 2 O lump and the metal lump are put into a water tank in a separate container, and a hydrochloric acid solution is added dropwise to the generated alkaline liquid according to a pH meter to make neutralized water and then drained. In addition,
Na 2 O fumes generated in the initial stage of melting the valve are sucked by a dust collector (not shown) provided on the upper part of the crucible.
【００２６】尚、図中、１０ａは溶融開始時のバルブ本
体、２７は調整用コンデンサー、２８はコンデンサー、
２９は高周波発振機、３０は３相交流電源を各々図示す
る。In the figure, 10a is a valve body at the start of melting, 27 is a condenser for adjustment, 28 is a condenser,
29 is a high frequency oscillator, 30 is a 3-phase alternating current power supply, respectively.
【００２７】実施例２ ＥＳＲ（エレクトロスラグ溶解
法を用いた場合） 図２は本実施例に係る金属Ｎａ入エンジンバルブ処理の
概略を示す。 Example 2 ESR (When Electroslag Melting Method is Used) FIG. 2 shows the outline of the metallic Na-containing engine valve treatment according to this example.
【００２８】予め耐熱るつぼ３１内にフラックス（Ｓｉ
Ｏ2 ，ＣａＯ，ＣａＦ2 などのスラグ組成分に調整した
もの）を投入し、定電圧トランス電源３２からＬ，Ｒ回
路で調整した所定交番電流（２０〜５０Ｖ，３００〜５
００Ａ）を非消耗電極３３（通常高級グラファイト）を
介して通電し、ジュール発熱により、溶融スラグ３４を
形成（通常１６５０〜１８００℃）した後、未切断Ｎａ
入エンジンバルブ１０を投入し融解する。比重の大きい
（ρ≒８）バルブ材は下層の溶融金属層３５を形成し、
比重の小さい（ρ≒2.５〜3.０）スラグは、上層の溶融
スラグ層３４を形成する。るつぼ３１の内壁には、凝固
スラグ層３４ａと凝固金属層３５ａを形成する。なお、
Ｎａ2Ｏはスラグ中の組成として吸収される。所定量の
処理を終えた時点で、通電を止め、凝固、冷却した金属
塊とガラス化したスラグ塊を取出す。 以後の処置は、
実施例１に同じ様に処理した。尚、図中３６はコイル、
３７は可変抵抗、３８はスイッチを各々図示する。Flux (Si) was previously placed in the heat-resistant crucible 31.
A predetermined alternating current (20 to 50 V, 300 to 5) adjusted by the L and R circuits from the constant voltage transformer power supply 32 is supplied by supplying a slag composition such as O 2 , CaO, and CaF 2.
00A) is passed through the non-consumable electrode 33 (usually high-grade graphite) to form molten slag 34 by Joule heat generation (usually 1650 to 1800 ° C.), and then uncut Na
Turn on engine valve 10 and melt. The valve material having a large specific gravity (ρ≈8) forms the lower molten metal layer 35,
The slag having a small specific gravity (ρ≈2.5 to 3.0) forms the upper molten slag layer 34. A solidified slag layer 34a and a solidified metal layer 35a are formed on the inner wall of the crucible 31. In addition,
Na 2 O is absorbed as a composition in the slag. When a predetermined amount of treatment is completed, the energization is stopped, and the solidified and cooled metal block and the vitrified slag block are taken out. Subsequent treatment is
The same treatment as in Example 1 was carried out. In the figure, 36 is a coil,
Reference numeral 37 is a variable resistor, and 38 is a switch.
【００２９】実施例３（アーク溶融法を用いた場合） 図３は本実施例に係る金属Ｎａ入エンジンバルブ処理の
概略を示す。予め、未切断Ｎａ入エンジンバルブ１０を
耐熱るつぼ（グラファイト、アルミナｅｔｃ）４１内に
投入し、非消耗電極（グラファイトなど）４２に結線さ
れた電源４３から供電し、電極間でアーク４４を発生さ
せ、このアークプラスマでバルブを溶融する。アーク直
下では、溶融金属プール４５が形成され、アークから距
離が大きい位置では、凝固金属塊４５ａが形成される。
以後の処置は、実施例１に同様に処理する。 Example 3 (When the Arc Melting Method is Used) FIG. 3 shows the outline of the metallic Na-containing engine valve treatment according to this example. The uncut Na-filled engine valve 10 is put into a heat-resistant crucible (graphite, alumina etc) 41 in advance, and power is supplied from a power source 43 connected to a non-consumable electrode (graphite, etc.) 42 to generate an arc 44 between the electrodes. , Melt the valve with this arc plasma. A molten metal pool 45 is formed immediately below the arc, and a solidified metal block 45a is formed at a position where the distance from the arc is large.
The subsequent treatment is the same as in Example 1.
【００３０】実施例４（抵抗加熱融解法を用いた場合） 図４は本実施例に係る金属Ｎａ入エンジンバルブ処理の
概略を示す。グラファイト製もしくは水冷銅製の如く、
導電性を有する下型５１と上型５２の間に非導電性耐熱
材（Ａｌ2Ｏ3 ，Ｓｉ3Ｎ4 ，Ｚｒ2Ｏ3 などのセラミッ
ク製）５３を介在させ、上下金型の短絡を回避する。上
型５２が上昇した状態で、下型５１内に金属Ｎａ入エン
ジンバルブ１０を投入した後、上型５２を下降させて、
導通状態にし、スイッチ５４をＯＮにして、バルブの抵
抗によるジュール発熱により、加熱溶融する。本法に於
いては密閉処理となるため、集塵機は省略しても良い。
尚、図中５５は電源、５６はトランスを各々図示する。 Example 4 (When the Resistance Heating Melting Method is Used) FIG. 4 shows the outline of the metallic Na-containing engine valve treatment according to this example. Like graphite or water-cooled copper,
A non-conductive heat-resistant material (made of ceramics such as Al 2 O 3 , Si 3 N 4 , Zr 2 O 3 ) 53 is interposed between a conductive lower mold 51 and an upper mold 52 to short-circuit the upper and lower molds. To avoid. In a state where the upper mold 52 is raised, the metal Na-containing engine valve 10 is put into the lower mold 51, and then the upper mold 52 is lowered,
It is brought into a conductive state, the switch 54 is turned on, and Joule heat is generated due to the resistance of the valve to heat and melt. In this method, the dust collector may be omitted because it is a closed treatment.
In the figure, 55 is a power source and 56 is a transformer.
【００３１】上述した実施例において実施例１では熱溶
融手段として、図１に示した高周波加熱を用いたが、電
気ヒーター加熱方法を採用しても良い。In the above-described embodiment, the high frequency heating shown in FIG. 1 is used as the heat melting means in the first embodiment, but an electric heater heating method may be adopted.
【００３２】又、図３に示したアーク溶融法に代えて、
ガスバーナー溶断、溶融法プラズマ、更にはレーザー溶
断、溶融法であっても良い。また、図２に示したエレク
トロスラグ溶融法に代って、るつぼ４１中に酸化鉄粉
（Ｆｅ3Ｏ4）とアルミ粉末（Ａｌ）を混入させ、その粉
末中に未切断Ｎａ入バルブを埋設した後、バーナー等で
粉末に添加し、下記のテルミット反応熱でバルブを溶融
しても良い。Further, instead of the arc melting method shown in FIG.
Gas burner fusing, melting method plasma, and further laser fusing and melting method may be used. Further, instead of the electroslag melting method shown in FIG. 2, iron oxide powder (Fe 3 O 4 ) and aluminum powder (Al) are mixed in the crucible 41, and an uncut Na-containing valve is embedded in the powder. After that, it may be added to the powder with a burner or the like, and the valve may be melted by the following Thermite reaction heat.
【化６】 [Chemical 6]
【００３３】以上に示した各種溶融法の選定は、熱源、
電源供給水の有無や容量、バルブの処理量、スペース設
備費との相関から生じるコスト・パフォーマンスや条例
に基づく排水基準から行えば良い。The selection of the various melting methods shown above depends on the heat source,
It may be performed based on the cost performance and the drainage standard based on the regulations, which are caused by the correlation with the existence and capacity of power supply water, the throughput of valves, and the space facility cost.
【００３４】[0034]
【発明の効果】以上、実施例と共に述べたように本発明
によれば、従来法で行っていた金属Ｎａ入エンジンバル
ブを切断後、水中に没して、Ｎａと水を直接反応させ
て、危険な水素が発生する湿式処理法に代って、熱的手
段により、金属Ｎａ入エンジンバルブを丸ごと溶融させ
Ｎａを溶融、酸化させてなるので、危険な水素が発生せ
ず、作業を安全に行えると共に作業効率が向上するとい
う効果を奏する。As described above with reference to the embodiments, according to the present invention, after the metal Na-containing engine valve, which was used in the conventional method, is cut and then immersed in water to directly react Na with water, Instead of the wet treatment method that produces dangerous hydrogen, the whole metal Na-containing engine valve is melted and Na is melted and oxidized by a thermal means, so dangerous hydrogen is not produced and work is safe. There is an effect that the work efficiency can be improved while being performed.
【図１】実施例１に係る金属Ｎａ入エンジンバルブの処
理概略図である。FIG. 1 is a schematic process diagram of a metal Na-containing engine valve according to a first embodiment.
【図２】実施例２に係る金属Ｎａ入エンジンバルブの処
理概略図である。FIG. 2 is a schematic process diagram of a metal Na-containing engine valve according to a second embodiment.
【図３】実施例３に係る金属Ｎａ入エンジンバルブの処
理概略図である。FIG. 3 is a process schematic diagram of a metal Na-containing engine valve according to a third embodiment.
【図４】実施例４に係る金属Ｎａ入エンジンバルブの処
理概略図である。FIG. 4 is a schematic process diagram of a metal Na-containing engine valve according to a fourth embodiment.
【図５】金属Ｎａ入エンジンバルブの概略図である。FIG. 5 is a schematic view of a metal Na-containing engine valve.
【図６】従来の金属Ｎａ入エンジンバルブの処理概略図
である。FIG. 6 is a process schematic diagram of a conventional engine valve with metal Na.
１０ 金属Ｎａ入エンジンバルブ １１ バルブ本体 １２ 金属Ｎａ ２１ 高周波トランス ２２ 高周波加熱コイル ２３ るつぼ ２５ 金属溶融 ２６ Ｎａ2Ｏスラグ ３１ 耐熱るつぼ ３３ 非消耗電極 ３４ 溶融スラグ ３５ 溶融金属層 ４１ 耐熱るつぼ ４２ 非消耗電極 ４４ アーク ４５ 溶融金属プール ５１ 下型 ５２ 上型 ５３ 非導電性耐熱材10 Engine Engine Valve with Metal Na 11 Valve Body 12 Metal Na 21 High Frequency Transformer 22 High Frequency Heating Coil 23 Crucible 25 Metal Melting 26 Na 2 O Slag 31 Heat Resistant Crucible 33 Non-consumable Electrode 34 Molten Metal Slag 35 Heat Resistant Crucible 42 Non-consumable Electrode 44 arc 45 molten metal pool 51 lower mold 52 upper mold 53 non-conductive heat resistant material
Claims (2)
バルブの処理方法において、金属ナトリウム入エンジン
バルブを加熱融解手段により直接融解することを特徴と
する金属ナトリウム入エンジンバルブの処理方法。1. A method for treating an engine valve having metal sodium therein, wherein the engine valve containing metal sodium is directly melted by a heating and melting means.
ナトリウムを酸化させて酸化ナトリウムとした後、水と
反応させて水酸化ナトリウム水溶液とすると共に、酸で
中和することを特徴とする金属ナトリウム入エンジンバ
ルブの処理方法。2. The metallic sodium according to claim 1, further comprising oxidizing the molten metallic sodium into sodium oxide, reacting with water to form an aqueous sodium hydroxide solution, and neutralizing with an acid. How to process the incoming engine valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20466292A JPH0649549A (en) | 1992-07-31 | 1992-07-31 | Treatment of metallic sodium-containing engine valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20466292A JPH0649549A (en) | 1992-07-31 | 1992-07-31 | Treatment of metallic sodium-containing engine valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0649549A true JPH0649549A (en) | 1994-02-22 |
Family
ID=16494209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20466292A Pending JPH0649549A (en) | 1992-07-31 | 1992-07-31 | Treatment of metallic sodium-containing engine valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0649549A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0648920A1 (en) * | 1993-10-18 | 1995-04-19 | Mitsubishi Jukogyo Kabushiki Kaisha | Method and apparatus for processing hollow bodies filled with metallic sodium |
| US6540171B2 (en) | 2000-02-10 | 2003-04-01 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Thread winding apparatus |
| JP2012047069A (en) * | 2010-08-25 | 2012-03-08 | Mitsubishi Heavy Ind Ltd | Treatment method of metallic sodium-filled hollow engine valve |
-
1992
- 1992-07-31 JP JP20466292A patent/JPH0649549A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0648920A1 (en) * | 1993-10-18 | 1995-04-19 | Mitsubishi Jukogyo Kabushiki Kaisha | Method and apparatus for processing hollow bodies filled with metallic sodium |
| US6540171B2 (en) | 2000-02-10 | 2003-04-01 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Thread winding apparatus |
| JP2012047069A (en) * | 2010-08-25 | 2012-03-08 | Mitsubishi Heavy Ind Ltd | Treatment method of metallic sodium-filled hollow engine valve |
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