JPH0310021A - Method for preventing explosion in stage for cooling treatment of valve for internal combustion engine internally sealed with metal sodium - Google Patents
Method for preventing explosion in stage for cooling treatment of valve for internal combustion engine internally sealed with metal sodiumInfo
- Publication number
- JPH0310021A JPH0310021A JP14281389A JP14281389A JPH0310021A JP H0310021 A JPH0310021 A JP H0310021A JP 14281389 A JP14281389 A JP 14281389A JP 14281389 A JP14281389 A JP 14281389A JP H0310021 A JPH0310021 A JP H0310021A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- internal combustion
- combustion engine
- cooling treatment
- cooling
- 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
- 238000001816 cooling Methods 0.000 title claims abstract description 22
- 238000004880 explosion Methods 0.000 title claims abstract description 11
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 10
- 239000011734 sodium Substances 0.000 title claims description 15
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 title claims description 13
- 229910052708 sodium Inorganic materials 0.000 title claims description 13
- 238000000034 method Methods 0.000 title claims description 7
- 229910052751 metal Inorganic materials 0.000 title abstract description 6
- 239000002184 metal Substances 0.000 title abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910001868 water Inorganic materials 0.000 claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 3
- 239000007789 gas Substances 0.000 claims description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 13
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 9
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- AZMMUMQYPBKXHS-UHFFFAOYSA-N gold sodium Chemical compound [Na].[Au] AZMMUMQYPBKXHS-UHFFFAOYSA-N 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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)
- Heat Treatment Of Articles (AREA)
Abstract
Description
本発明は、高性能内燃機関用の吸排気弁における加熱処
理後の冷却処理時に爆発を防止する方法に関するもので
ある。The present invention relates to a method for preventing explosions during cooling treatment after heating treatment in intake and exhaust valves for high-performance internal combustion engines.
従来この種弁は、第２図のように、弁体内空部に金属ナ
トリウムＳを封入した構造であり、焼入れ、焼戻し、温
水及び木（以下、中に水という）による冷却処理等を経
て製品化されるのである。
Ｃ発明が解決しようとする課題】
通常は金１ヱナトリウムが漏れないように接合部Ｋを密
閉溶接しであるが、その熱処理前の製造工程において溶
接不良等から欠陥が生じるものもあり、検査でも分から
ない場合がある。
このため加熱処理の後の急冷の際１通箔は冷媒として４
５〜５０℃の温水と、２０〜２５°Ｃの木とで二回使用
するのであるが、この水冷によると不良品の弁から漏れ
た金属ナトリウムが水と空気に念しく反応（Ｎａ＋Ｈ２
０−＋Ｎａ０１（＋Ｈ２０）し、発生した水素は酸素と
結合して爆発的に燃焼するのである。また時性ソーダ（
ＮａＯＨ）になっていないＮａは爆発ガスと一緒に飛散
して作業者等に火傷を与える可能性が大きいものであっ
た。さらに爆発音に驚いた作業者が二次的な災害を起す
こともあり歌大な問題点であった。
これを回避するため、発火したものを砂、ソーダ灰、防
水シート等で榎う方法があるが、これによると冷却槽や
水を汚染し、作業場の周囲を汚染するため、作叉再開ま
でに多大のロスを生じることとなって採用できないので
ある。
そこで本発明は、金属ナトリウムが漏れても爆発を防止
できるよう安全に作業ができる方法を提供するものであ
る。Conventionally, this type of valve has a structure in which metallic sodium S is sealed inside the valve body, as shown in Fig. 2, and the product is manufactured through quenching, tempering, and cooling treatment with hot water and wood (hereinafter referred to as water inside). It will be transformed into [Problem to be solved by the invention C] Normally, the joint K is hermetically welded to prevent sodium gold from leaking, but defects may occur due to poor welding during the manufacturing process before heat treatment, and inspection is required. But sometimes you don't know. Therefore, when rapidly cooling after heat treatment, one piece of foil acts as a refrigerant.
It is used twice, once with hot water at 5-50℃ and once with wood at 20-25℃. According to this water cooling, the metal sodium leaking from the valve of the defective product carefully reacts with water and air (Na + H2
0-+Na01 (+H20), and the generated hydrogen combines with oxygen and combusts explosively. Also, occasional soda (
Na that has not been converted into NaOH (NaOH) has a high possibility of scattering together with the explosive gas and causing burns to workers. Furthermore, workers who were startled by the explosion noise could cause secondary accidents, which was a major problem. To avoid this, there is a method to cover up the ignited material with sand, soda ash, tarpaulin, etc., but this contaminates the cooling tank and water, and the surrounding area of the workplace, so it will be difficult to restart cultivation. This would result in a huge amount of loss and could not be adopted. Therefore, the present invention provides a method that can be used safely to prevent explosions even if metallic sodium leaks.
このため本発明は、内空部に金属ナトリウムを封入した
内燃機関用弁を加熱処理し、ついで冷却処理するに際し
て、該冷却処理槽の水面を不燃。
不活性のアルゴンガス或いは窒素ガスでシールし、金属
ナトリウムが急激に水及びｍ素と反応するのを阻止する
方法としている。
ここで、ガスシールをアルゴンガス或いは窒素カスとし
たのは１反応しても安全成分であると共に、空気層との
遮断が良好であるためである。
なお、炭酸ガスでは爆発を充分に防止できなかったので
ある。For this reason, the present invention makes the water surface of the cooling treatment tank incombustible when heat treating an internal combustion engine valve whose inner space is filled with metallic sodium and then cooling it. The method is to seal with inert argon gas or nitrogen gas to prevent metallic sodium from rapidly reacting with water and hydrogen. Here, the reason why argon gas or nitrogen gas is used as the gas seal is that it is a safe component even if one reaction occurs, and that it is well isolated from the air layer. Note that carbon dioxide gas was not able to sufficiently prevent explosions.
冷却処理するに際して、該冷却処理槽の水面をアルゴン
ガス或いは窒素ガスでシールすることにより、水面をガ
スシール被覆して空気と断絶させるのである。このため
、弁から漏れた金属ナトリウムが木と反応して生じる水
素がｍ素と急激に反応するのを阻！Ｅできることから爆
発を防止できるのである。
通常、冷却時間は数分以内であり、その間だけガスシー
ルすればよい。
なお、ガスシール中に金属ナトリウム漏れから生じた水
素は、ガスシールを解除しても徐々に溶けて衝性ンーダ
（ＮａＯＨ）となって消滅するため爆発の危険性はない
。During the cooling treatment, the water surface of the cooling treatment tank is sealed with argon gas or nitrogen gas, so that the water surface is covered with a gas seal and is isolated from the air. This prevents the hydrogen produced when the metal sodium leaking from the valve reacts with the wood from rapidly reacting with the m-element! Explosions can be prevented because E can be done. Usually, the cooling time is within a few minutes, and gas sealing only needs to be performed during that time. Furthermore, even if the gas seal is released, the hydrogen generated from the leakage of metallic sodium during the gas seal gradually dissolves and disappears as NaOH, so there is no risk of explosion.
あり、１はスチール冷却槽であり、脱イオン水が５００
ｃｃ貯水しである。２は窒素ボンベであり、減圧弁３を
介して供給管４を接続し、その先端ノズル４ａを冷却槽
ｌ内の空気部に配置して液面に対向させている。窒素ガ
スの噴出圧力は０．５〜２．０ｋｇ／ｃｍ３ であり、
微量を水面上にノズル４ａから吐出させることで水面上
にガスシールできたのである。
実験では１．を図的に金属ナトリウムが漏れるようにし
た弁５を加熱後、直ちに窒素ガスで水面をガスシールし
た冷却槽ｌに収容したが爆発燃焼を生じなかった。
また、金属ナトリウムを粒塊状とした固体６を冷却槽！
内に投入し、直ちにノズル４ａがら窒素ガスを噴出して
ガスシールしたが発火燃焼はみられず、徐々に溶けて句
性ソーダ（ＮａＯＨ）となったのである。
なお１本例では窒素ガスを用いたが、アルゴンガスを用
いても同様な効果が得られた。しかしながら、コスト面
からした窒素ガスの使用が好適である。Yes, 1 is a steel cooling tank with 500 ml of deionized water.
It is a cc water storage. Reference numeral 2 denotes a nitrogen cylinder, to which a supply pipe 4 is connected via a pressure reducing valve 3, and its tip nozzle 4a is disposed in the air portion of the cooling tank l, facing the liquid level. The ejection pressure of nitrogen gas is 0.5 to 2.0 kg/cm3,
By discharging a small amount onto the water surface from the nozzle 4a, it was possible to seal the gas above the water surface. In the experiment 1. After heating the valve 5 which was designed to allow metallic sodium to leak out, it was immediately placed in a cooling tank l whose water surface was sealed with nitrogen gas, but no explosive combustion occurred. In addition, solid 6 made of metallic sodium in the form of granules is placed in a cooling tank!
Nitrogen gas was immediately ejected from the nozzle 4a to create a gas seal, but no ignition or combustion was observed, and the product gradually melted to become NaOH. Although nitrogen gas was used in this example, similar effects were obtained using argon gas. However, from the viewpoint of cost, it is preferable to use nitrogen gas.
本発明によると、弁の冷却処理における爆発を防止でき
て作業者の安全が確保できる効果が大きくい優れた発明
である。According to the present invention, it is an excellent invention that has a great effect of preventing explosions during valve cooling processing and ensuring the safety of workers.
第１図は本発明の詳細な説明するための装置図第２図は
内燃機関用弁の縦断面図である。
１：冷却槽、２：窒素ボンベ、３：減圧弁、４：供給管
、４ａ：ノズル、５：試験の弁、６：金属ナトリウムの
固体、
Ｓ：金属ナトリウム、 Ｋ：接合部。
第１図FIG. 1 is a device diagram for explaining the present invention in detail, and FIG. 2 is a longitudinal sectional view of a valve for an internal combustion engine. 1: cooling tank, 2: nitrogen cylinder, 3: pressure reducing valve, 4: supply pipe, 4a: nozzle, 5: test valve, 6: solid sodium metal, S: sodium metal, K: joint. Figure 1
Claims (1)
を加熱処理し、ついで冷却処理するに際して、該冷却処
理槽の水面をアルゴンガス或いは窒素ガスでシールする
ことを特徴とし、金属ナトリウムが急激に水及び空気と
反応するのを阻止する金属ナトリウムを封入した内燃機
関用弁の冷却処理工程における爆発防止方法。(1) When an internal combustion engine valve whose inner space is filled with metallic sodium is heat-treated and then cooled, the water surface of the cooling treatment tank is sealed with argon gas or nitrogen gas, so that the metallic sodium is sealed. A method for preventing explosions in the cooling process of valves for internal combustion engines filled with metallic sodium to prevent sudden reactions with water and air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14281389A JPH0310021A (en) | 1989-06-05 | 1989-06-05 | Method for preventing explosion in stage for cooling treatment of valve for internal combustion engine internally sealed with metal sodium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14281389A JPH0310021A (en) | 1989-06-05 | 1989-06-05 | Method for preventing explosion in stage for cooling treatment of valve for internal combustion engine internally sealed with metal sodium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0310021A true JPH0310021A (en) | 1991-01-17 |
Family
ID=15324226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14281389A Pending JPH0310021A (en) | 1989-06-05 | 1989-06-05 | Method for preventing explosion in stage for cooling treatment of valve for internal combustion engine internally sealed with metal sodium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0310021A (en) |
Cited By (4)
| 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 |
| US6474863B2 (en) | 1999-11-08 | 2002-11-05 | Japan Servo Co. Ltd. | Agitator and fixing device thereof |
| US6746173B2 (en) | 2001-04-25 | 2004-06-08 | Japan Servo Co., Ltd. | Universal joint |
| CN106795782A (en) * | 2015-10-28 | 2017-05-31 | 日锻汽门株式会社 | To the inert gas supply method in poppet intermediate and to the inert gas feedway in poppet intermediate |
-
1989
- 1989-06-05 JP JP14281389A patent/JPH0310021A/en active Pending
Cited By (6)
| 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 |
| US5560380A (en) * | 1993-10-18 | 1996-10-01 | Mitsubishi Jukogyo Kabushiki Kaisha | Method and apparatus for processing hollow bodies filled with metallic sodium |
| US6474863B2 (en) | 1999-11-08 | 2002-11-05 | Japan Servo Co. Ltd. | Agitator and fixing device thereof |
| US6746173B2 (en) | 2001-04-25 | 2004-06-08 | Japan Servo Co., Ltd. | Universal joint |
| CN106795782A (en) * | 2015-10-28 | 2017-05-31 | 日锻汽门株式会社 | To the inert gas supply method in poppet intermediate and to the inert gas feedway in poppet intermediate |
| CN106795782B (en) * | 2015-10-28 | 2018-06-12 | 日锻汽门株式会社 | Inert gas supply method into poppet intermediate and the inert gas feedway into poppet intermediate |
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