JPH0435032Y2 - - Google Patents
Info
- Publication number
- JPH0435032Y2 JPH0435032Y2 JP1986082217U JP8221786U JPH0435032Y2 JP H0435032 Y2 JPH0435032 Y2 JP H0435032Y2 JP 1986082217 U JP1986082217 U JP 1986082217U JP 8221786 U JP8221786 U JP 8221786U JP H0435032 Y2 JPH0435032 Y2 JP H0435032Y2
- Authority
- JP
- Japan
- Prior art keywords
- protective cover
- divided
- axial direction
- protrusions
- grooves
- 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
- 239000002184 metal Substances 0.000 claims description 22
- 229910052751 metal Inorganic materials 0.000 claims description 22
- 230000001681 protective effect Effects 0.000 claims description 21
- 239000000919 ceramic Substances 0.000 claims description 8
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 238000010248 power generation Methods 0.000 description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000005552 hardfacing Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Description
【考案の詳細な説明】
「産業上の利用分野」
本考案は、発電用ボイラー・熱交換機などの金
属管接続溶接部のセラミツク保護カバーに関する
ものである。[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a ceramic protective cover for the welded joints of metal tubes in power generation boilers, heat exchangers, etc.
「従来の技術」
発電用ボイラー・熱交換機の配管は、耐熱・耐
酸耐食性を持つた金属管が使用されているが、排
煙中の熱風による酸化、窒素酸化物・硫黄酸化物
などによる高温腐食、灰や微粉原料による高温摩
耗など極めて厳しい環境にさらされている。``Conventional technology'' Heat-resistant, acid-resistant and corrosion-resistant metal pipes are used for power generation boilers and heat exchanger piping, but they suffer from oxidation due to hot air in flue gas and high-temperature corrosion due to nitrogen oxides, sulfur oxides, etc. , exposed to extremely harsh environments such as high-temperature abrasion caused by ash and fine powder raw materials.
特に、金属管接続溶接部においては、酸化、腐
食、摩耗が早く、従来より耐熱金属による保護カ
バー、セラミツク溶射、あるいはハードフエイシ
ングなどによる保護の検討が行われてきた。 In particular, welded joints of metal pipes are susceptible to oxidation, corrosion, and wear quickly, and consideration has been given to protecting them with protective covers made of heat-resistant metals, ceramic spraying, or hard facings.
金属管接続溶接部の耐熱鋼による保護では、耐
酸化、耐腐食、耐摩耗が不十分で、また、セラミ
ツク溶射による保護では、金属とセラミツクの接
着強度不足により耐久性が不十分で、さらに、ハ
ードフエイシングによる保護では高温における耐
腐食、耐摩耗が不十分で、未だ満足できる解決策
は見出されてない。 Protection of metal pipe connection welds with heat-resistant steel has insufficient oxidation, corrosion, and wear resistance, and protection with ceramic spraying has insufficient durability due to insufficient adhesive strength between metal and ceramic. Hard facing protection has insufficient corrosion and wear resistance at high temperatures, and no satisfactory solution has yet been found.
「考案が解決しようとする問題点」
本考案は、発電用ボイラー・熱交換機などの金
属管接続溶接部の耐酸化、耐腐食、耐摩耗が十分
な保護カバーを提供しようとするものである。``Problems to be Solved by the Invention'' The present invention aims to provide a protective cover that is sufficiently resistant to oxidation, corrosion, and abrasion for the welded joints of metal pipes in power generation boilers, heat exchangers, etc.
「考案が解決しようとする手段」
金属管接続溶接部を気孔率10％以下のセラミツ
ク焼結体より構成した保護カバーにより外方より
覆わせる。``Means that the invention attempts to solve'' The welded joints of metal pipes are covered from the outside with a protective cover made of ceramic sintered body with a porosity of 10% or less.
「実施例」
第１図に示すように、ステンレス製の金属管１
および金属管２の管端どうしを当接させ、該当接
部を溶接して接続した金属管接続溶接部Ｗを外方
より保護カバー１１で覆わせる。"Example" As shown in Figure 1, a stainless steel metal tube 1
Then, the pipe ends of the metal pipes 2 are brought into contact with each other, and the metal pipe connection welded part W, which is connected by welding the corresponding contact parts, is covered with a protective cover 11 from the outside.
保護カバー１１の例示は第２図から第５図に示
し、金属管１，２に外嵌まりする円筒体を軸方向
に二分割に切断した半割り状の分割体１２，１３
よりなる、窒化珪素質焼結体である。この窒化珪
素質焼結体は、強度、耐熱衝撃性が優れており、
溶接金属の付着も少なく、特に気孔率10％以下の
緻密質体を用いることにより耐摩耗性を高めるこ
とができる。 Examples of the protective cover 11 are shown in FIGS. 2 to 5, and include half-split bodies 12 and 13 obtained by cutting a cylindrical body that fits into the metal tubes 1 and 2 into two in the axial direction.
It is a silicon nitride sintered body consisting of. This silicon nitride sintered body has excellent strength and thermal shock resistance.
There is less adhesion of weld metal, and wear resistance can be particularly improved by using a dense body with a porosity of 10% or less.
第２図では、保護カバー１１は金属管１，２に
外嵌まりする円筒体を軸方向に二分割に切断した
半割り状の分割体１２，１３よりなる。分割体１
２と他方の分割体１３とは軸方向に嵌合する結合
部を備える。分割体１２の結合部は、両端部に軸
方向の外向き突条１４，１５を突設し、突条１
４，１５に相隣る軸方向の凹溝１６，１７を刻設
する。他方の分割体１３は、それと嵌合する軸方
向の凹溝１８，１９を刻設し、凹溝１８，１９に
相隣る端部で軸方向の内向きの突条２０，２１を
突設する。分割体１２，１３は、その突条１４，
１５を凹溝１８，１９に、突条２０，２１を凹溝
１６，１７にそれぞれ嵌めて保護カバー１１を形
成する。 In FIG. 2, the protective cover 11 is made up of half-split bodies 12 and 13 obtained by cutting a cylindrical body that fits onto the metal tubes 1 and 2 into two halves in the axial direction. Split body 1
2 and the other divided body 13 are provided with a coupling portion that fits in the axial direction. The joint portion of the divided body 12 has axially outward protrusions 14 and 15 protruding from both ends, and the protrusions 1
4 and 15 are provided with adjacent axial grooves 16 and 17. The other divided body 13 has grooves 18 and 19 in the axial direction that are fitted therein, and inward protrusions 20 and 21 that extend in the axial direction are formed at the ends adjacent to the grooves 18 and 19. do. The divided bodies 12 and 13 have their protrusions 14,
15 into the grooves 18 and 19, and the protrusions 20 and 21 into the grooves 16 and 17, respectively, to form the protective cover 11.
第３図においても、第２図と同様であるが、た
だ突条および凹溝を第２図の場合のように対称的
に設けてない点が異なる。 3 is similar to FIG. 2, except that the protrusions and grooves are not provided symmetrically as in FIG. 2.
すなわち、分割体１２の結合部は一方の端部に
軸方向の外向き突条１４を突設し、突条１４に相
隣る軸方向の凹溝１６を刻設し、他方の端部に軸
方向の内向き突条３１を突設し、突条３１に相隣
る軸方向の凹溝３２を刻設する。他方の分割体１
３は、それと嵌合する軸方向の凹溝１８を刻設
し、凹溝１８に相隣る端部で軸方向の内向き突条
２０を突設し、他方の端部に軸方向の凹溝３３を
刻設し、凹溝３３に相隣る端部で軸方向の外向き
の突条３４を突設する。分割体１２，１３は、そ
の突条１４，３１を凹溝１８，３３に、突条２
０，３４を凹溝１６，３２にそれぞれ嵌めて保護
カバー１１を形成する。 That is, the joint portion of the divided body 12 has an axial outward protrusion 14 protruding from one end, an axial concave groove 16 adjacent to the protrusion 14, and a groove 16 extending from the axial direction adjacent to the protrusion 14. An axial inward protrusion 31 is provided to protrude, and an axial groove 32 adjacent to the protrusion 31 is carved. The other divided body 1
3 has an axial groove 18 that fits therein, an axial inward protrusion 20 protruding from the end adjacent to the groove 18, and an axial groove 20 at the other end. A groove 33 is carved, and a protrusion 34 extending outward in the axial direction is provided at an end adjacent to the groove 33. The divided bodies 12 and 13 have their protrusions 14 and 31 in the grooves 18 and 33, and the protrusions 2 and 31 in the grooves 18 and 33.
0 and 34 into the grooves 16 and 32, respectively, to form the protective cover 11.
第４図においては、分割体１２の一方の端部に
軸方向の突条４１を突設し、他方の端部には軸方
向の凹溝４２を刻設する。他方の分割体１３は、
それと嵌合する軸方向の凹溝４３を刻設し、他方
の端部に突条４４を突設する。分割体１２，１３
は、その突条４１，４４を凹溝４３，４２にそれ
ぞれ嵌めて保護カバー１１を形成する。 In FIG. 4, an axial protrusion 41 is provided on one end of the divided body 12, and an axial groove 42 is provided on the other end. The other divided body 13 is
An axial groove 43 that fits therein is carved, and a protrusion 44 is provided protruding from the other end. Divided bodies 12, 13
The protective cover 11 is formed by fitting the protrusions 41 and 44 into the grooves 43 and 42, respectively.
第５図においては、分割体１２の両端部に下方
向きの突起５１，５１を突設し、突起５１の相隣
る内側に溝５２，５２を刻設し、他方の分割体１
３は、それと嵌合する溝５３，５３を刻設し相隣
る端部で上方に向けて突起５４，５４を突設す
る。分割体１２，１３は、その突起５１，５４を
溝５３，５２にそれぞれ嵌めて保護カバー１１を
形成する。 In FIG. 5, downward protrusions 51, 51 are provided at both ends of the divided body 12, grooves 52, 52 are carved on the adjacent inner sides of the protrusions 51, and the other divided body 1
No. 3 is provided with grooves 53, 53 to be fitted therein, and protrusions 54, 54 protruding upward at adjacent ends. The divided bodies 12 and 13 form the protective cover 11 by fitting their protrusions 51 and 54 into the grooves 53 and 52, respectively.
第６図においては、溶接部Ｗを半割り状の分割
体１２，１３にて覆わせ、その上端および下端を
別の保護カバー１１の分割体１２および１３を取
付けて固定させる。 In FIG. 6, the welded portion W is covered with half-shaped divided bodies 12 and 13, and the divided bodies 12 and 13 of another protective cover 11 are attached to the upper and lower ends thereof and fixed.
「考案の効果」
本考案は、上述のように、金属管接続溶接部を
外方より覆う保護カバーであつて、軸方向に分割
され、互いに軸方向に嵌合するための結合部を備
えた複数個の分割体からなり、各分割体が気孔率
10％以下の緻密な窒化珪素質焼結体からなる金属
管接続溶接部のセラミツク保護カバーであり、発
電用ボイラー・熱交換機などの金属管接続溶接部
での耐酸化、耐腐食、耐摩耗が十分な保護カバー
の提供が可能である。"Effect of the invention" As mentioned above, the present invention is a protective cover that covers a metal pipe connection weld from the outside, and is divided in the axial direction and provided with a joint part for fitting together in the axial direction. Consists of multiple divided bodies, each divided body has a different porosity.
This is a ceramic protective cover for metal pipe connection welds made of a dense silicon nitride sintered body with a density of less than 10%, and is oxidation-resistant, corrosion-resistant, and wear-resistant for metal pipe connection welds in power generation boilers, heat exchangers, etc. It is possible to provide sufficient protective cover.
また、本考案を示す第３，４，５図に示すよう
に保護カバーは、各分割体は他の分割体と対称構
造にしておくと、同じものを生産すればよいの
で、生産が容易である。 In addition, as shown in Figures 3, 4, and 5 showing the present invention, the protective cover can be manufactured easily by making each divided body have a symmetrical structure with the other divided bodies, since it is only necessary to produce the same thing. be.
さらに、本考案は保護カバーは分割体で構成さ
れているため、既に設置されている発電用ボイラ
ー・熱交換機などの金属管接続溶接部に、着脱が
容易で、破損した際にも簡単に交換が可能であ
る。 Furthermore, since the protective cover of this invention is constructed as a separate body, it can be easily attached and detached to the welded joints of metal pipes of already installed power generation boilers, heat exchangers, etc., and can be easily replaced in the event of damage. is possible.
図面は本考案の具体的実施例で、第１図はその
全体の概要を示す斜視図、第２図から第５図は保
護カバーの具体例の斜視図、第６図は他の具体的
実施例の全体の概要を示す斜視図である。
１，２……金属管、Ｗ……金属管接続溶接部、
１１……セラミツク保護カバー。
The drawings show a specific embodiment of the present invention; FIG. 1 is a perspective view showing the overall outline, FIGS. 2 to 5 are perspective views of a specific example of the protective cover, and FIG. 6 is a perspective view of another specific embodiment. FIG. 2 is a perspective view showing an overview of the entire example. 1, 2...Metal pipe, W...Metal pipe connection welded part,
11... Ceramic protective cover.
Claims (1)
あつて、軸方向に分割され、互いに軸方向に嵌合
するための結合部を備えた複数個の分割体からな
り、各分割体が気孔率10％以下の緻密な窒化珪素
質焼結体からなる金属管接続溶接部のセラミツク
保護カバー。 A protective cover that covers a metal pipe connection weld from the outside.It is divided in the axial direction and consists of a plurality of divided bodies each having a joint part for fitting together in the axial direction, and each divided body has a porosity. Ceramic protective cover for metal pipe connection welds made of 10% or less dense silicon nitride sintered body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986082217U JPH0435032Y2 (en) | 1986-05-29 | 1986-05-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986082217U JPH0435032Y2 (en) | 1986-05-29 | 1986-05-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62193987U JPS62193987U (en) | 1987-12-09 |
| JPH0435032Y2 true JPH0435032Y2 (en) | 1992-08-19 |
Family
ID=30934667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986082217U Expired JPH0435032Y2 (en) | 1986-05-29 | 1986-05-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0435032Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5856539B2 (en) * | 2012-05-23 | 2016-02-09 | 日立造船株式会社 | Cylindrical cover |
| JP6916673B2 (en) * | 2017-06-20 | 2021-08-11 | 未来工業株式会社 | Cylinder structure and joint accommodating member |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59155396U (en) * | 1983-04-04 | 1984-10-18 | 株式会社 広築 | Pipe external insulation block |
-
1986
- 1986-05-29 JP JP1986082217U patent/JPH0435032Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62193987U (en) | 1987-12-09 |
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