JPS63243694A - Heat transfer tube - Google Patents
Heat transfer tubeInfo
- Publication number
- JPS63243694A JPS63243694A JP5959288A JP5959288A JPS63243694A JP S63243694 A JPS63243694 A JP S63243694A JP 5959288 A JP5959288 A JP 5959288A JP 5959288 A JP5959288 A JP 5959288A JP S63243694 A JPS63243694 A JP S63243694A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- lead
- outer tube
- layer
- solder
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 229910000978 Pb alloy Inorganic materials 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 238000002844 melting Methods 0.000 claims abstract description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract 5
- 229910052802 copper Inorganic materials 0.000 claims abstract 5
- 239000010949 copper Substances 0.000 claims abstract 5
- 229910000679 solder Inorganic materials 0.000 abstract description 7
- 238000007747 plating Methods 0.000 abstract description 4
- 230000008018 melting Effects 0.000 abstract description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 abstract description 2
- PIJPYDMVFNTHIP-UHFFFAOYSA-L lead sulfate Chemical compound [PbH4+2].[O-]S([O-])(=O)=O PIJPYDMVFNTHIP-UHFFFAOYSA-L 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】 本発明は被鉛伝熱管の改良に関するものである。[Detailed description of the invention] The present invention relates to improvements in lead-covered heat exchanger tubes.
従来、重油燃焼排ガスより排出される熱エネルギーを回
収するだめの熱交換に使用される伝熱管は、該ガス中に
含まれる硫酸等のために短期間において腐食されるおそ
れがあるため鋼管又は鋼管等の内管の外側に鉛合金な被
鉛機にて均一の厚さに押出被覆した外管とからなる２重
管が使用されている。然しなからこの場合第１図に示す
如く内管１、外管２との間に僅かな空気層３が形成され
易いため、外管２の表面に高温３００°Ｃ程度の排ガス
が流入されるとこの空気層が熱膨張によって局部的膨出
部４を形成するおそれがある。このように内管と外管と
の密着性が悪いと熱抵抗が増大するばかりか外管を著し
く劣化せしめるものである。即ち外管の表面温度は内管
中に流れる流体（水など）の温度によって引っ張られる
ため、内管と外管との密着性が局部的に悪いとこの部分
が排ガスによって局部的に高温（１５０″Ｃ以上）にな
り著しく被鉛を劣化させる。Conventionally, heat transfer tubes used for heat exchange to recover thermal energy emitted from heavy oil combustion exhaust gas are steel pipes or steel pipes because they may corrode in a short period of time due to the sulfuric acid contained in the gas. A double tube is used, which consists of an inner tube and an outer tube coated with a lead alloy by extrusion to a uniform thickness using a lead-covering machine. However, in this case, as shown in FIG. 1, a slight air layer 3 is likely to be formed between the inner tube 1 and the outer tube 2, so that exhaust gas at a high temperature of about 300°C flows into the surface of the outer tube 2. There is a possibility that this air layer may form a local bulge 4 due to thermal expansion. Poor adhesion between the inner tube and the outer tube as described above not only increases the thermal resistance but also significantly deteriorates the outer tube. In other words, the surface temperature of the outer tube is influenced by the temperature of the fluid (water, etc.) flowing in the inner tube, so if the adhesion between the inner tube and the outer tube is locally poor, this area will become locally high temperature (150°C) due to the exhaust gas. ``C or higher'' and significantly deteriorates the lead coating.
本発明は、かかる現状に鑑み鋭意研究を行った結果、内
管と外管との密着性が良好な伝熱管を開発したものであ
る。即ち本発明に係る伝熱管は、鋼管、鋼管等の表面に
半田、錫、鉛などの低溶融点金属の薄層例えばメッキ法
により設け、この金属薄層を溶融状態にして鉛管又は鉛
合金管を被覆したものである。The present invention has been made as a result of extensive research in view of the current situation, and has resulted in the development of a heat transfer tube with good adhesion between the inner tube and the outer tube. That is, the heat exchanger tube according to the present invention is produced by providing a thin layer of a low-melting point metal such as solder, tin, or lead on the surface of a steel pipe, steel pipe, etc. by, for example, plating, and melting this thin metal layer to form a lead pipe or a lead alloy pipe. It is coated with
次に本発明の一例を図面により説明する。第２図に示す
如く鋼管１表面を酸洗又は研摩した後、メッキ法により
半田の薄層５を設け、この半田層５を加熱してその表面
を溶融状態せしめ、この状態において鉛合金管２を被覆
して本発明の伝熱管を得たものである。Next, an example of the present invention will be explained with reference to the drawings. As shown in FIG. 2, after pickling or polishing the surface of the steel pipe 1, a thin layer 5 of solder is applied by plating, and this solder layer 5 is heated to bring the surface into a molten state. The heat exchanger tube of the present invention was obtained by coating.
従って内管の鋼管と外管の鉛合金管とは溶蔵半円層を介
してよく密着し、この両者間に空気層など全く形成され
ることがない。Therefore, the inner steel pipe and the outer lead alloy pipe are in close contact with each other through the fused semicircular layer, and no air space is formed between them.
本発明によれば次の如き効果を有するものである。According to the present invention, the following effects are achieved.
（１）内管と外管との密着性がよいため熱抵抗が少なく
熱伝達率がよい。又引抜力はｏ、 ｓ ｋｇ ／ｃ！以
上であった。(1) Good adhesion between the inner tube and outer tube, resulting in low thermal resistance and good heat transfer coefficient. Also, the pulling force is o, s kg/c! That was it.
（２）内管と外管との間に空気層がないため常に外管の
表面温度は内管内に流入する水の温度より１０’Ｃ程度
高いだけであるため外管が局部的に劣化することがない
。(2) Since there is no air layer between the inner tube and the outer tube, the surface temperature of the outer tube is always only about 10'C higher than the temperature of the water flowing into the inner tube, causing local deterioration of the outer tube. Never.
（３）外管が局部的に膨出することなく、外管表面に形
成される硫酸鉛の皮膜が脱落することなく長期に亘り使
用することができる。(3) The outer tube does not bulge locally and the lead sulfate film formed on the surface of the outer tube does not fall off, allowing it to be used for a long period of time.
第１図は従来の伝熱管の側断面図、第２図は本発明伝熱
管の一例を示す断面図である。
１・内管、２・・・被鉛外管、３・・・空気層、４・・
膨出部、５・・・低融点金属薄層。
特許出願人 古河電気工業株式会社
Ｎ１ 図
第２ 図FIG. 1 is a side sectional view of a conventional heat exchanger tube, and FIG. 2 is a sectional view showing an example of the heat exchanger tube of the present invention. 1.Inner tube, 2.Leaded outer tube, 3.Air layer, 4..
Swollen portion, 5...Low melting point metal thin layer. Patent applicant: Furukawa Electric Co., Ltd. N1 Figure 2
Claims (1)
金属薄層を溶融状態にして鉛管又は鉛合金管を被覆して
なる伝熱管。A heat exchanger tube made by providing a thin layer of low-melting metal on the surface of an inner tube such as a copper tube or steel tube, and making the thin metal layer into a molten state to cover a lead tube or a lead alloy tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5959288A JPS63243694A (en) | 1988-03-14 | 1988-03-14 | Heat transfer tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5959288A JPS63243694A (en) | 1988-03-14 | 1988-03-14 | Heat transfer tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63243694A true JPS63243694A (en) | 1988-10-11 |
| JPH0363000B2 JPH0363000B2 (en) | 1991-09-27 |
Family
ID=13117662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5959288A Granted JPS63243694A (en) | 1988-03-14 | 1988-03-14 | Heat transfer tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63243694A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5447157A (en) * | 1977-09-20 | 1979-04-13 | Furukawa Electric Co Ltd:The | Heat pipe having fins for collecting waste heat |
| JPS5616091A (en) * | 1979-06-29 | 1981-02-16 | Neratoom | Heat exchanger |
-
1988
- 1988-03-14 JP JP5959288A patent/JPS63243694A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5447157A (en) * | 1977-09-20 | 1979-04-13 | Furukawa Electric Co Ltd:The | Heat pipe having fins for collecting waste heat |
| JPS5616091A (en) * | 1979-06-29 | 1981-02-16 | Neratoom | Heat exchanger |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0363000B2 (en) | 1991-09-27 |
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