JPH0435720Y2 - - Google Patents
Info
- Publication number
- JPH0435720Y2 JPH0435720Y2 JP1986015447U JP1544786U JPH0435720Y2 JP H0435720 Y2 JPH0435720 Y2 JP H0435720Y2 JP 1986015447 U JP1986015447 U JP 1986015447U JP 1544786 U JP1544786 U JP 1544786U JP H0435720 Y2 JPH0435720 Y2 JP H0435720Y2
- Authority
- JP
- Japan
- Prior art keywords
- rod
- ignition
- ceramic
- electrode
- gas
- 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
Links
- 239000000919 ceramic Substances 0.000 claims description 32
- 239000002131 composite material Substances 0.000 claims description 9
- 239000012212 insulator Substances 0.000 claims description 7
- 239000003921 oil Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical group [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 229910010271 silicon carbide Inorganic materials 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 230000003064 anti-oxidating effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Spark Plugs (AREA)
Description
【考案の詳細な説明】
〈産業上の利用分野〉
この考案はガスバーナやオイルバーナに付随す
るパイロツトバーナに配置されていてガスバーナ
やオイルバーナへの点火の役目を果す点火ロツド
に係り、特に性能面においてすぐれた点火ロツド
に関するものである。[Detailed description of the invention] <Industrial application field> This invention relates to an ignition rod that is placed in a pilot burner attached to a gas burner or oil burner and plays the role of igniting the gas burner or oil burner. This article relates to an excellent ignition rod.
〈従来の技術〉
ガスバーナやオイルバーナにおいて用いられる
パイロツトバーナには点火ロツドが設置させてい
て、ガスバーナやオイルバーナの点火の役目を果
している。しかしてこの点火ロツドの材質として
は、これまでステンレス（SUS）が主として用
いられているが、耐熱性に劣ること、点火位置が
限定されること、などの欠点を有している。また
ステンレスに代つて通常のセラミツクを用いる
と、耐熱性はよいが、絶縁体であるため、放電が
できなく着火ができない。<Prior Art> An ignition rod is installed in a pilot burner used in a gas burner or an oil burner, and serves to ignite the gas burner or oil burner. However, although stainless steel (SUS) has been mainly used as the material for the ignition rod, it has drawbacks such as poor heat resistance and limited ignition position. Also, if ordinary ceramic is used instead of stainless steel, it has good heat resistance, but because it is an insulator, it cannot generate electric discharge and cannot ignite.
そこで、他の従来例として、特開昭60−138328
号公報に示す点火プラグが知られている。この点
火プラグは、導電性を有する複合セラミツクから
なる電極を、端子部及び放電部を除いて非導電性
のセラミツクからなる被覆部材で覆つた構造であ
り、該電極の材質は、炭化硅素（SiC）、ジリコ
ニウムブライド（ZrB2）のそれぞれ約50％素性
の導電性の複合セラミツクからなつている。 Therefore, as another conventional example, JP-A-60-138328
The spark plug shown in the publication is known. This spark plug has a structure in which an electrode made of a conductive composite ceramic is covered with a covering member made of a non-conductive ceramic except for the terminal part and the discharge part, and the material of the electrode is silicon carbide (SiC). ) and zirconium bride (ZrB 2 ), each consisting of about 50% elemental conductive composite ceramics.
〈考案が解決しようとする課題〉
ところが、上記他の従来例において、電極の素
材として用いられるSiC＋ZrB2の抵抗値は、周知
のように、10°Ω・cmレベル（SiC：〜102，
ZrVB2：〜102）であり、抵抗値が大きいため、
かかる電極を用いて点火ロツドを製造するときに
は、放電効果が劣り、着火をスムーズに行なうこ
とはできない。しかも、この従来例においては、
その電極が放電加工性及び耐寿命の点で優れてい
るという根拠についても何ら記載されていない。<Problem to be solved by the invention> However, in the other conventional examples mentioned above, the resistance value of SiC + ZrB 2 used as the electrode material is at the 10°Ω・cm level (SiC: ~10 2 ,
ZrVB2: ~10 2 ) and has a large resistance value, so
When manufacturing an ignition rod using such an electrode, the discharge effect is poor and ignition cannot be carried out smoothly. Moreover, in this conventional example,
There is also no mention of any evidence that the electrode is superior in electrical discharge machinability and longevity.
この考案は、上記従来の課題を解決するために
なされたもので、良導電性を有し、放電加工性及
び耐熱性に優れ、かつ寿命を長くでき、さらに点
火位置を広範囲にセツトできる点火プラグを提供
することを目的とする。 This invention was made in order to solve the above-mentioned conventional problems, and it is a spark plug that has good conductivity, excellent electrical discharge machinability and heat resistance, has a long life, and can be set in a wide range of ignition positions. The purpose is to provide
〈課題を解決するための手段〉
本考案者らは上記に鑑みて良電導性を有し、し
かも耐熱性があつて酸化防止の点から寿命の長い
点火ロツドを得るべく、その材質について検討の
結果、良電導性を有するセラミツクを用いて製造
した点火ロツドであれば上記特性が得られること
を見出したのである。<Means for solving the problem> In view of the above, the inventors of the present invention have studied the material in order to obtain an ignition rod that has good conductivity, is heat resistant, and has a long life in terms of anti-oxidation. As a result, they discovered that the above characteristics can be obtained with an ignition rod manufactured using ceramic having good electrical conductivity.
即ち、この考案は、ガスまたはオイル用バーナ
に用いるパイロツトバーナの一面側に形成する点
火ロツドであつて、電気伝導度が1S・cm1以上の
良電導性セラミツク複合体からなる電極棒と、こ
の電極棒の放電部とは反対側の端子部に接続され
る高圧端子と、該電極棒と高圧端子との接続部分
を外部から被覆する絶縁体とを備えたことを特徴
とする点火ロツドである。 That is, this invention is an ignition rod formed on one side of a pilot burner used in a gas or oil burner, and includes an electrode rod made of a highly conductive ceramic composite having an electrical conductivity of 1S cm 1 or more, and An ignition rod characterized by comprising a high-voltage terminal connected to a terminal portion of the electrode rod on the opposite side from the discharge portion, and an insulator that covers the connecting portion between the electrode rod and the high-voltage terminal from the outside. .
〈作用〉
この考案によれば、電気伝導度が1S・cm-1以上
の良電導性セラミツク複合体により電極棒を構成
したから、通常の導電性セラミツクからなる電極
と比べて抵抗値が３桁程度小さくなり、放電特性
が良好になることにより、スムーズな着火が得ら
れる。<Function> According to this invention, since the electrode rod is made of a highly conductive ceramic composite with an electrical conductivity of 1S cm -1 or more, the resistance value is three orders of magnitude higher than that of electrodes made of ordinary conductive ceramics. As the discharge characteristics become smaller and the discharge characteristics become better, smooth ignition can be obtained.
さらに、上記セラミツクは良電導性とともに放
電加工性にも優れているので、該セラミツクがも
つ優れた機械的特性を生かしたまま、電極棒の
種々の形状への加工が容易となる。 Furthermore, since the ceramic has good electrical conductivity and excellent electrical discharge machinability, electrode rods can be easily machined into various shapes while taking advantage of the ceramic's excellent mechanical properties.
〈実施例〉
以下、この考案をその一実施例を示す図面に基
づいて説明する。<Example> Hereinafter, this invention will be explained based on drawings showing one example thereof.
第１図がこの考案になる点火ロツドＡであつ
て、１が良電導性セラミツク複合体よりなる電極
棒、２は絶縁碍子（絶縁体）、３は高圧端子であ
る。しかして、このセラミツク電極棒１と高圧端
子３は絶縁碍子２中で接続されているが、セラミ
ツクの電極棒１はその先端を保炎板６内に挿入し
て着火させるだけのためのものであるから、高価
な点と合わせて出来るだけ短くてよい。 FIG. 1 shows an ignition rod A of this invention, in which 1 is an electrode rod made of a highly conductive ceramic composite, 2 is an insulator, and 3 is a high voltage terminal. The ceramic electrode rod 1 and the high-voltage terminal 3 are connected in the insulator 2, but the ceramic electrode rod 1 is only used for igniting by inserting its tip into the flame-holding plate 6. Since it is available, it is good to keep it as short as possible, considering the fact that it is expensive.
第２図はこの点火ロツドＡのセラミツク電極棒
１を燃焼筒４内でメインガス噴出管５の先端に取
付けた複数の２次空気噴出口７を有する保炎板６
に挿入した状態を示すものであり、８はパイロツ
トガス供給パイプである。 FIG. 2 shows a flame stabilizing plate 6 having a plurality of secondary air jetting ports 7 in which the ceramic electrode rod 1 of this ignition rod A is attached to the tip of the main gas jetting pipe 5 in the combustion tube 4.
8 is a pilot gas supply pipe.
また、この点火ロツドＡは第３図のように、パ
イロツドガス供給パイプ８に対して、その対向側
に設置したフレームロツド、即ち火炎検知ロツド
Ｂとともに用いられる。 Further, as shown in FIG. 3, this ignition rod A is used together with a flame rod, that is, a flame detection rod B, installed on the opposite side of the pilot gas supply pipe 8.
かくして、第２図および第３図に示すようなガ
スまたはオイル用バーナにおいて、この考案の良
電導性を有するセラミツクからなる点火ロツドを
用いるだけでも、即ち火炎検知ロツドや保炎板６
は従来のステンレスやセラミツクスであつても着
火の時点からその効果はすぐれているが、この火
炎検知ロツドや保炎板をも点火ロツドと同様のセ
ラミツク製とすならばその効果をさらに相乗的と
することができる。 Thus, in a gas or oil burner as shown in FIGS. 2 and 3, even if the ignition rod made of ceramic with good electrical conductivity of this invention is used, the flame detection rod and the flame holding plate 6 can be easily used.
Even if it is made of conventional stainless steel or ceramics, its effect is excellent from the point of ignition, but if the flame detection rod and flame holding plate are also made of ceramics like the ignition rod, the effect will be even more synergistic. can do.
この考案において、点火ロツドの材質として使
用する良電導性のセラミツ複合体とは、平均粒径
2μm以下のSi3N4粒子と少なくとも一部が互いに
連結したTiNまたは／およびTiC粉末からなる電
気伝導度が1S・cm-1以上であるセラミツクであ
る。 In this invention, the ceramic composite with good conductivity used as the material of the ignition rod has an average particle size of
It is a ceramic having an electrical conductivity of 1S·cm -1 or more, which is made of Si 3 N 4 particles of 2 μm or less and TiN or/and TiC powders at least partially connected to each other.
そしてこのようなセラミツク複合体の製造法の
一例を挙げると、Si3N4粉末に電導性付与剤とし
てTiNまたは／およびTiC粉末を15〜40体積％、
焼結助剤としてMgOまたは／およびＡ2O3粉末
を0.01〜3.0体積％添加し、非酸化性雰囲気中、
加圧下で1600〜2000℃で焼結することにより、得
られるものであり、このセラミツクは良電導性と
ともに放電加工性にもすぐれるので、この考案の
ような形状への加工も簡単に行うことができるの
である。 To give an example of a method for manufacturing such a ceramic composite, 15 to 40% by volume of TiN or/and TiC powder as a conductivity imparting agent is added to Si 3 N 4 powder.
Adding 0.01 to 3.0 volume % of MgO or/and A 2 O 3 powder as a sintering aid, in a non-oxidizing atmosphere,
It is obtained by sintering at 1600 to 2000℃ under pressure, and this ceramic has good electrical conductivity and excellent electrical discharge machinability, so it can be easily processed into the shape of this invention. This is possible.
即ち、上記構成によれば、
電極棒１を構成する良電導性セラミツクの電
気伝導度1S・cm1以上であるから、通常の導電
性セラミツク、例えばSiCやZrB2などからなる
電極と比べて、抵抗値が３桁程度小さくなり、
放電特性が良好になることにより、着火をスム
ーズに行なうことができる。 That is, according to the above configuration, since the electrical conductivity of the highly conductive ceramic constituting the electrode rod 1 is 1S·cm 1 or more, compared to an electrode made of ordinary conductive ceramics such as SiC or ZrB 2 , The resistance value decreases by about 3 orders of magnitude,
By improving the discharge characteristics, ignition can be performed smoothly.
上記セラミツクは良電導性とともに、放電加
工性にも優れているので、該セラミツクがもつ
優れた機械的特性を生かしたままで、複雑形状
加工や微細加工等が容易となり、本願考案にお
ける電極棒１のような形状への加工も簡単に行
なうことができる。 The above-mentioned ceramic has good electrical conductivity as well as excellent electrical discharge machinability, so it is easy to process complex shapes and micro-fabricate while taking advantage of the ceramic's excellent mechanical properties. Processing into such shapes can be easily performed.
上記良電導性セラミツクは耐熱性にも優れて
いるので、酸化防止の点から寿命の長い電極棒
１を得ることができると共に、点火位置を広範
囲にセツトでき、これにより、該点火ロツドを
用いたガス湯沸器などの本体をよりコンパクト
にすることが可能となる。 Since the above-mentioned highly conductive ceramic has excellent heat resistance, it is possible to obtain the electrode rod 1 which has a long life from the viewpoint of preventing oxidation, and the ignition position can be set over a wide range, thereby making it possible to use the ignition rod. This makes it possible to make the main body of a gas water heater more compact.
その結果、本願考案に係る点火ロツドは、ガス
湯沸器、ガス風呂などのガスバーナのみならず、
重油、軽油、灯油などを燃料とするボイラやフア
ーネスなどのオイル用バーナにおける点火ロツド
としても用いることができ、重油や軽油中の不純
物であるＳの影響は全く受けないのである。な
お、この考案に係る点火ロツドの形状は第１図に
示すものがその一例であつて、これに何ら限定さ
れるものではない。 As a result, the ignition rod according to the present invention can be used not only for gas burners such as gas water heaters and gas baths, but also for gas burners such as gas water heaters and gas baths.
It can also be used as an ignition rod in oil burners such as boilers and furnaces that use heavy oil, light oil, kerosene, etc. as fuel, and is completely unaffected by S, an impurity in heavy oil and light oil. Incidentally, the shape of the ignition rod according to this invention is shown in FIG. 1 as an example, and is not limited to this in any way.
〈考案の効果〉
以上説明したように、この考案によれば、電気
伝導度が1S・cm2以上の良導電性セラミツク複合
体で電極棒を構成したから、放電特性が良好とな
り、着火がスムーズに行なえると共に、耐熱性及
び放電加工性も優れ、かつ寿命が長く、さらに点
火位置を広範囲にセツトできる点火ロツドを得る
ことができるという格別の効果を奏する。<Effects of the invention> As explained above, according to this invention, the electrode rod is made of a highly conductive ceramic composite with an electrical conductivity of 1S cm 2 or higher, which results in good discharge characteristics and smooth ignition. The present invention has the special effect of providing an ignition rod that has excellent heat resistance and electrical discharge machinability, has a long life, and allows the ignition position to be set over a wide range.
第１図はこの考案に係るセラミツク製点火ロツ
ドの斜視図、第２図は燃焼筒内におけるこの考案
のセラミツク製点火ロツドの配置を示す説明図、
第３図は同じくフレームロツドとこの考案のセラ
ミツク製点火ロツドとの関係を示す一部切欠説明
図である。
Ａ……点火ロツド、Ｂ……フレームロツド、１
……良電導性セラミツクよりなる電極棒、２……
絶縁碍子（絶縁体）、３……高圧端子、４……燃
焼室、５……メインガス噴出室、６……保炎板、
７……２次空気噴出口、８……パイロツトガス供
給パイプ。
Fig. 1 is a perspective view of a ceramic ignition rod according to this invention, and Fig. 2 is an explanatory diagram showing the arrangement of the ceramic ignition rod of this invention in a combustion cylinder.
FIG. 3 is a partially cutaway explanatory view showing the relationship between the flame rod and the ceramic ignition rod of this invention. A...Ignition rod, B...Flame rod, 1
...Electrode rod made of highly conductive ceramic, 2...
Insulator (insulator), 3... High voltage terminal, 4... Combustion chamber, 5... Main gas ejection chamber, 6... Flame holding plate,
7...Secondary air outlet, 8...Pilot gas supply pipe.
Claims (1)
バーナの一面側に形成する点火ロツドであつて、
電気伝導度が1S・cm-1以上の良導電性セラミツク
ス複合体からなる電極棒と、この電極棒の放電部
とは反対側の端子部に接続される高圧端子と、該
電極棒と高圧端子との接続部分を外部から被覆す
る絶縁体とを備えたことを特徴とする点火ロツ
ド。 An ignition rod formed on one side of a pilot burner used for a gas or oil burner,
An electrode rod made of a highly conductive ceramic composite having an electrical conductivity of 1S cm -1 or more, a high voltage terminal connected to a terminal portion of the electrode rod on the opposite side from the discharge portion, and the electrode rod and the high voltage terminal. An ignition rod characterized by comprising an insulator that covers the connecting part with the rod from the outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986015447U JPH0435720Y2 (en) | 1986-02-05 | 1986-02-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986015447U JPH0435720Y2 (en) | 1986-02-05 | 1986-02-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62131257U JPS62131257U (en) | 1987-08-19 |
| JPH0435720Y2 true JPH0435720Y2 (en) | 1992-08-24 |
Family
ID=30806391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986015447U Expired JPH0435720Y2 (en) | 1986-02-05 | 1986-02-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0435720Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60138328A (en) * | 1983-12-26 | 1985-07-23 | Hitachi Heating Appliance Co Ltd | Ignition plug |
| JPS6122588A (en) * | 1984-07-09 | 1986-01-31 | 日本特殊陶業株式会社 | Ignition plug |
-
1986
- 1986-02-05 JP JP1986015447U patent/JPH0435720Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60138328A (en) * | 1983-12-26 | 1985-07-23 | Hitachi Heating Appliance Co Ltd | Ignition plug |
| JPS6122588A (en) * | 1984-07-09 | 1986-01-31 | 日本特殊陶業株式会社 | Ignition plug |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62131257U (en) | 1987-08-19 |
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