JPS63199991A - Rust preventive method of metallic piping - Google Patents
Rust preventive method of metallic pipingInfo
- Publication number
- JPS63199991A JPS63199991A JP3282087A JP3282087A JPS63199991A JP S63199991 A JPS63199991 A JP S63199991A JP 3282087 A JP3282087 A JP 3282087A JP 3282087 A JP3282087 A JP 3282087A JP S63199991 A JPS63199991 A JP S63199991A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- tube
- pipe
- foam
- resin adhesive
- 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
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 title claims description 13
- 238000000034 method Methods 0.000 title claims description 11
- 230000003449 preventive effect Effects 0.000 title 1
- 230000001070 adhesive effect Effects 0.000 claims description 26
- 239000000853 adhesive Substances 0.000 claims description 24
- 229910052751 metal Inorganic materials 0.000 claims description 23
- 239000002184 metal Substances 0.000 claims description 23
- 229920005989 resin Polymers 0.000 claims description 19
- 239000011347 resin Substances 0.000 claims description 19
- 230000002265 prevention Effects 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 description 15
- 239000006260 foam Substances 0.000 description 14
- 238000010438 heat treatment Methods 0.000 description 7
- 239000003507 refrigerant Substances 0.000 description 7
- 238000007789 sealing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005187 foaming Methods 0.000 description 4
- 239000012943 hotmelt Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000012774 insulation material Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000008397 galvanized steel Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000015243 ice cream Nutrition 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の目的〕
産業上の利用分野
本発明は冷却装置の冷媒配管等金属管同志の接続部分の
防錆処理や配管の分岐部分の防錆処理等を行なうための
金属配管の防錆方法に関する。[Detailed Description of the Invention] [Object of the Invention] Industrial Field of Application The present invention is a method for rust-proofing the joints of metal pipes such as refrigerant pipes of cooling equipment, and rust-proofing the branching parts of pipes. Concerning rust prevention methods for metal piping.
従来の技術
従来此種の冷却装置特に熱交換器にあっては、金属製パ
イプの外表面を合成樹脂の被膜で被覆して防錆処理する
ことが一般に行なわれていた。しかし、この防錆処理を
施したバイブ同志をそのまま溶接すると、その接続部分
には別途の防錆処理を施す必要が生じる。そこでこの接
続部分を熱収縮チューブにて被い、チューブを加熱して
収縮させ表面に溶着し、液体やガスの侵入を防止するも
のがあった。一方、実公昭５３ ４３８１４号公報に開
示されるように、外表面を合成樹脂の被膜で被覆したバ
イブの端末部に、被膜をパイプ表面に挿着させる挟着部
を有した柔軟性材からなるバイブ状キャップを被挿した
ものがあった。2. Description of the Related Art Conventionally, in this type of cooling device, particularly in a heat exchanger, it has been common practice to coat the outer surface of a metal pipe with a synthetic resin film to prevent rust. However, if the vibrators that have been subjected to this anti-rust treatment are simply welded together, it becomes necessary to apply a separate anti-rust treatment to the connecting portion. Therefore, there has been a method of covering this connection part with a heat-shrinkable tube, heating the tube, shrinking it, and welding it to the surface to prevent the intrusion of liquid or gas. On the other hand, as disclosed in Japanese Utility Model Publication No. 53-43814, the end portion of a vibrator whose outer surface is coated with a synthetic resin coating is made of a flexible material having a clamping part for inserting the coating onto the pipe surface. Some had a vibrator-like cap inserted.
発明が解決しようとする問題点
前記従来の技術における前者にあっては、熱収縮チュー
ブの加熱のための熱源（例えば熱風や遠赤外線等）が必
要であるとともに工程数を多く必要とするため、加工面
及び生産性の面で問題があった。一方後者にあっては、
挟着部を有した柔軟性材を被挿しただけの非常に簡易的
な構成のため、装着のための作業性が良好でかつ生産性
に優れており安価であるものの、挟着部による押圧だけ
ではキャップとパイプとの固着が十分であるとはいえず
、キャップがずれたり、キャップに亀裂が生じたりする
と、そのシール性に欠陥ができ金属パイプの寿命を縮め
ることになるという問題があった。Problems to be Solved by the Invention The former method in the prior art requires a heat source (for example, hot air or far infrared rays) for heating the heat shrink tube, and requires a large number of steps. There were problems in processing and productivity. On the other hand, in the latter case,
Since it has a very simple structure in which a flexible material with a clamping part is inserted, it is easy to work with, has excellent productivity, and is inexpensive. This alone is not sufficient to ensure that the cap and pipe are firmly fixed, and if the cap becomes misaligned or cracks occur, there is a problem that the sealing performance will be defective and the life of the metal pipe will be shortened. Ta.
このため本発明は、加工性及び生産性に優れ、かつシー
ル性の良好な金属配管の防錆方法を提供しようとするも
のである。Therefore, it is an object of the present invention to provide a method for preventing rust of metal piping, which is excellent in workability and productivity, and has good sealing properties.
問題点を解決するための手段
本発明における金属配管の防錆方法は、表面が言出せる
金属配管に防錆のための熱収縮チューブを装着するにあ
たり、加熱溶融樹脂接着剤又は発泡加熱樹脂接着剤のよ
うな樹脂接着剤を加熱した状態で熱収縮チューブと金属
配管の間に介在させて、この熱を熱源となして熱収縮チ
ューブを金属配管に装着させるものである。Means for Solving the Problems The rust prevention method for metal piping according to the present invention uses a heat-melting resin adhesive or foamed heating resin adhesive when attaching a heat-shrinkable tube for rust prevention to a metal pipe with a visible surface. A heated resin adhesive such as the above is interposed between the heat-shrinkable tube and the metal pipe, and the heat is used as a heat source to attach the heat-shrinkable tube to the metal pipe.
作用
樹脂接着材であるフオームメルト剤（５１ａ） ヲ予め
加熱しておき、このフオームメルト剤（５１ａ）を熱収
縮チューブ（５０）内へ充填すると、フオームメルト剤
（５１ａ）の熱が熱収縮チューブ（５０）を熱収縮させ
、フオームメルト剤（５１ａ）の発泡と熱収縮チューブ
（５０）の収縮との相乗効果で、フオームメルト剤（５
１ａ）が金属パイプ表面及びパイプ分岐部（５２）やパ
イプ間の隙間（５３）に確実に入り込んで、熱収縮チュ
ーブク５０）内の空洞をなくしている。The foam melt agent (51a), which is a working resin adhesive, is heated in advance, and when this foam melt agent (51a) is filled into the heat shrink tube (50), the heat of the foam melt agent (51a) is transferred to the heat shrink tube. (50) is heat-shrinked, and the synergistic effect of the foaming of the foam-melt agent (51a) and the shrinkage of the heat-shrinkable tube (50) causes the foam-melt agent (50) to shrink.
1a) reliably enters the surface of the metal pipe, the pipe branch (52), and the gap (53) between the pipes, eliminating cavities within the heat-shrinkable tube 50).
実施例
以下本発明の実施例について第１図〜第８図を参照して
説明する。EXAMPLES Examples of the present invention will be described below with reference to FIGS. 1 to 8.
（１）はアイスクリームやシャーベット等を展示・販売
するために用いられる低温ショーケースにて代表される
断熱箱体であり、前面上部に透視窓（２）を、上面前半
部に形成される開口を開閉自在に閉本する左右２枚の前
後方向摺動式の透明扉（３ａ）（３ｂ）を、上面後半部
に透明扉（３ａ）（３ｂ）の開放時に扉（３ａ）（３ｂ
）を収納するための収納室（４）をそれぞれ設けた断熱
箱（５）と、断熱箱（５）の下方に冷却に必要不可欠な
機械部品を配設する機械室（６）とから本体を構成して
いる。断熱箱（５）は、庫内（７）を画成する上面を開
口した金属製例えば溶融亜鉛メッキ鋼板の内箱（８〉と
、との内箱（８）を収納し、かつ内箱（８）との間に間
隔を存して形成される上面に開口を有した金属製例えば
溶融亜鉛メッキ鋼板の外箱（９）と、この内外両箱（８
）（９）間に発泡充填される硬質ポリウレタン等の発泡
断熱材（１０）とにより構成され、−壁面に商品出し入
れ用の開口（１１）と、この間口（１１）方向に延出す
る突壁（１２）とを形成しており、突壁（１２）の上面
は背壁（９ｂ）に向けて下方へ傾斜させておく。(1) is a heat-insulating box, typically used in low-temperature showcases used to display and sell ice cream, sherbet, etc., with a see-through window (2) at the top of the front and an opening formed at the front half of the top. There are two transparent doors (3a) (3b) on the left and right sides that can be opened and closed freely, sliding in the front and back directions.
), and a machine room (6) in which mechanical parts essential for cooling are arranged below the heat insulating box (5). It consists of The insulating box (5) stores an inner box (8) made of metal, for example, hot-dip galvanized steel sheet, with an open top surface defining an interior (7), and an inner box (8) containing the inner box (8). An outer box (9) made of metal, e.g., hot-dip galvanized steel, with an opening on the top surface formed with a gap between the outer box (9) and the inner and outer boxes (8).
) (9) A foam insulation material (10) such as hard polyurethane filled in between, - an opening (11) in the wall surface for taking in and out products, and a projecting wall extending in the direction of this frontage (11). (12), and the upper surface of the projecting wall (12) is inclined downward toward the back wall (9b).
内箱（８）は、前、背、左、右、底の各壁（８ａ）〜（
８ｅ）からなり、その外周面に設けられた蛇行状の低温
冷媒管からなる主冷却器（１３）と、上面後半部に配置
されるもので所謂ロールボンド法またはチューブオンシ
ート法により成形され、前、背、左、右各周縁に立上片
を備えた板状の補助冷却器（１４）とにより庫内（７）
を冷却する。また、外箱（９）は、内面に冷凍サイクル
中の高温の気液混合冷媒乃至液冷媒が流れる蛇行状冷媒
管よりなる加熱要素としての熱交換器（１５）をアルミ
ニウムテープで貼着した前壁（９８）と、との前壁（９
ａ）よりも上方に延出する上端に折曲辺及びこの折曲辺
にて画成される前向きの溝を有する背壁（９ｂ）と、左
右両壁く９（り（９ｄ）と、緩やかに後止がりに傾斜し
後縁に発泡断熱材（１０）の注入孔（１６）及び前縁に
適数個の排気孔（１７）を有する底壁（９ｅ）と、周縁
に前、背、左、右の各立上辺（１８ａ）〜（１８ｄ）を
有し補助冷却器（１４）の真上に位置して緩やかに後下
がりに傾斜する土壁（１８）とからなり、熱交換器り１
５）にて前壁（９ａ）の結露防止を図っている。尚、加
熱要素として熱交換器（１５）に代わり、電気ヒータを
配置しても、同様の結露防止効果はある。The inner box (8) has front, back, left, right, and bottom walls (8a) to (
8e), a main cooler (13) consisting of a meandering low-temperature refrigerant pipe provided on its outer peripheral surface, and a main cooler (13) located in the rear half of the upper surface, which is molded by the so-called roll bonding method or tube-on-sheet method, Inside the refrigerator (7) is a plate-shaped auxiliary cooler (14) with raised pieces on the front, back, left, and right edges.
to cool down. In addition, the outer box (9) has a heat exchanger (15) as a heating element made of a meandering refrigerant pipe through which a high-temperature gas-liquid mixed refrigerant or liquid refrigerant flows during the refrigeration cycle, pasted with aluminum tape on the inner surface. The wall (98) and the front wall (9
a), a back wall (9b) having a bent side at the upper end extending upward from the left side and a forward facing groove defined by this bent side; A bottom wall (9e) slopes toward the rear and has an injection hole (16) for the foam insulation material (10) at the rear edge and an appropriate number of exhaust holes (17) at the front edge, and a front wall (9e) at the periphery. It consists of an earthen wall (18) that has left and right rising sides (18a) to (18d) and is located directly above the auxiliary cooler (14) and slopes gently downward. 1
5) is intended to prevent dew condensation on the front wall (9a). Incidentally, even if an electric heater is disposed as a heating element instead of the heat exchanger (15), the same dew condensation prevention effect can be obtained.
発泡断熱材（１０）は、その発泡立上り速度からして、
注入孔（１６）に対向する背壁（８ｂ）（９ｂ）間の壁
厚を、排気孔（１７）に対向する前壁（８ａ）（９ａ）
間の壁厚よりも薄くしており、また、補助冷却器（１４
）と土壁（１８）との間に配置きれた断熱性の仕切材（
１９）及び底壁（８ｅバ９ｅ）間に配置された断熱性の
ブロック（２０）を、その接着作用により一体化してい
る。The foamed insulation material (10) has a foaming rise rate of
The wall thickness between the back walls (8b) (9b) facing the injection hole (16) is the same as that of the front wall (8a) (9a) facing the exhaust hole (17).
It is thinner than the wall thickness between the walls, and the auxiliary cooler (14
) and the earthen wall (18).
19) and the bottom wall (8e, bar 9e), the heat insulating block (20) is integrated by its adhesive action.
機械室（６）は、外箱（９）の前壁（９ａ）下部と、左
右両壁（９Ｃ） （９ｄ ）の下部と、底壁（９ｅ）と
、上縁に上下方向に開口する第１排気路（２１〉並びに
この第１排気路（２１）より下部に位置し前後方向に開
口する第２排気路（２２）を形成し断熱箱体（１）の背
面に設けた機械部品取り出し用の開口を覆う取り外し自
在なカバー（２３）と、下面後部に位置し外箱（９）の
前壁（９ａ）下端との間に吸気路（２４）を形成するベ
ース（２５）とにより画成きれ、主・補助冷却器（１３
）（１４）とともに冷凍サイクルを構成する冷媒圧縮機
（２６）をベース（２５）上に、ワイヤーフィンチュー
ブ式凝縮器（２７）を吸気路（２４）の前後両縁に設け
た一対の支持具（２８）（２９）に夫々止着している。The machine room (6) consists of the lower part of the front wall (9a) of the outer box (9), the lower parts of both the left and right walls (9C) (9d), the bottom wall (9e), and a hole opening in the vertical direction at the upper edge. A first exhaust passage (21) and a second exhaust passage (22) located below the first exhaust passage (21) and opening in the front-rear direction are formed, and are provided on the back side of the heat insulating box body (1) for taking out mechanical parts. A removable cover (23) that covers the opening of the outer box (9), and a base (25) that is located at the rear of the lower surface and forms an intake path (24) between the lower end of the front wall (9a) of the outer box (9). Main/auxiliary cooler (13
) A pair of supports in which a refrigerant compressor (26), which together with (14) constitutes a refrigeration cycle, is mounted on a base (25), and a wire fin tube condenser (27) is provided at both front and rear edges of the intake passage (24). They are attached to (28) and (29), respectively.
また、収納室（４）は、前面に位置する樹脂製のシェー
ド板（３０）と、背面に位置する外箱（９）の背壁（９
ｂ）上部と、左右両側面に位置する左右一対の樹脂製の
側部連結部材と、上面に位置する金属製の天壁〈３１）
と、下面に位置する外箱（９）の土壁（１８）とにより
画成され、庫内外を照らす直管螢光灯等の照明（３２）
及び照明（３２）の点灯回路の一部である安定器（３３
）を備え、更に、透明扉（３ａ）（３ｂ）の開扉時にこ
の扉を収納する。（３４）は開口（１１）及び収納室（
４）の中央を前後方向に横切るセンターレールであり、
その後端は外箱（９〉の背壁（９ｂ）の溝に吊下された
吊具（３５）によって支持されている。The storage room (4) also includes a resin shade plate (30) located at the front and a back wall (9) of the outer box (9) located at the back.
b) The upper part, a pair of left and right resin side connecting members located on both left and right sides, and a metal ceiling wall located on the top surface (31)
and the earthen wall (18) of the outer box (9) located on the lower surface, and lighting such as a straight tube fluorescent light (32) that illuminates the inside and outside of the refrigerator.
and a ballast (33) that is part of the lighting circuit for the lighting (32).
), and the transparent door (3a) (3b) is stored when the door is opened. (34) is the opening (11) and the storage chamber (
4) is a center rail that crosses the center in the front-rear direction,
The rear end is supported by a hanger (35) suspended from a groove in the back wall (9b) of the outer box (9>).
第４図は内箱（８）関連の分解斜視図であって、（４０
）は補助冷却器（１４）の出口側パイプであってアルミ
ニウム管を使用しており、（４１）は同じく入口側バイ
ブであってアルミニウム製である。（４２）は入口側パ
イプ（４０）に接続するとともにドライヤー（４３）を
介して凝縮器（２７）へ連結するキャピラリーチューブ
であって、鋼管を使用しており、（４４）は出口側バイ
ブ（４１）に接続するとともに圧縮機（２６）へ連結す
るサクションバイブであって、鋼管を使用している。こ
こで、熱交換能力を増強せしめるために、キャピラリー
チューブ（４２）とサクションパイプ（４４）とを一部
分の距離！たけ相互に密着許せ、その部分を熱交換促進
チューブ（４５）として例えば熱収縮チューブにて被覆
しである。尚、この長さりだけの部分を熱交換部（Ｐ）
と称すものとする。また、入口側バイブ（４０）とキャ
ピラリーチューブ（４２）とは、銅製の入口連結管（４
６）により連結され、入口側バイブ（４０）と入口連結
管（４６）とはフラッシュバット溶接で接続されるとと
もに、溶接部並びに溶接部近傍は保護チューブ（４７）
で被覆しである。更に、出口側バイブ（４１）とサクシ
ョンバイブ（４４）とは、銅製の出口連結管（４８）に
より連結され、出口側バイブ（４１）と出口連結管（４
８〉とはフラッシュバット溶接で接続きれるとともに、
溶接部並びに溶接部近傍を保護チューブ（４９）で被覆
しである。FIG. 4 is an exploded perspective view of the inner box (8).
) is the outlet side pipe of the auxiliary cooler (14), which uses an aluminum tube, and (41) is the inlet side vibe, which is also made of aluminum. (42) is a capillary tube connected to the inlet side pipe (40) and connected to the condenser (27) via the dryer (43), using a steel pipe, and (44) is the outlet side pipe ( 41) and is connected to the compressor (26), using a steel pipe. Here, in order to increase the heat exchange capacity, the capillary tube (42) and the suction pipe (44) are separated by a certain distance! They are allowed to come into close contact with each other, and that portion is covered with, for example, a heat shrink tube as a heat exchange promoting tube (45). In addition, this length is the heat exchange part (P)
shall be called. In addition, the inlet side vibe (40) and the capillary tube (42) are made of a copper inlet connecting pipe (4
6), and the inlet side vibe (40) and the inlet connecting pipe (46) are connected by flash butt welding, and the welded part and the vicinity of the welded part are connected by a protective tube (47).
It is covered with. Furthermore, the outlet side vibe (41) and the suction vibe (44) are connected by a copper outlet connecting pipe (48), and the outlet side vibe (41) and the outlet connecting tube (44)
8> can be connected with flash butt welding, and
The welded part and the vicinity of the welded part are covered with a protective tube (49).
（５０）は入口側バイブ（４０）と入口連結管（４６）
を介したキャピラリーチューブ（４２）との連結部分並
びに出口側バイブ（４１）と出口連結管（４８）を介し
たサクションバイブ（４４〉との連結部分及びこれら近
傍等の２種以上の金属が近接しかつ裸出する箇所を被覆
する熱収縮チューブであり、チューブ（５ｏ）と前述の
数種の金属パイプとの間に、加熱した状態で使用する樹
脂接着剤（５１）としてホットメルト剤等の加熱溶融樹
脂接着剤またはフオームメルト剤等の発泡加熱樹脂接着
剤を介在させて、シール性の向上並びに接着性の向上を
図っている。(50) is the inlet side vibrator (40) and the inlet connecting pipe (46)
Two or more types of metals are in close proximity, such as the connection part with the capillary tube (42) via the outlet side vibrator (41) and the connection part with the suction vibe (44) via the outlet connecting pipe (48), and the vicinity thereof. Moreover, it is a heat-shrinkable tube that covers exposed areas, and a hot-melt agent or the like is used as a resin adhesive (51) to be used in a heated state between the tube (5o) and the several types of metal pipes mentioned above. A foamed heated resin adhesive such as a heated melt resin adhesive or a foam melt agent is used to improve sealing properties and adhesive properties.
次にこの熱収縮チューブ（５０）を固定するための作業
手順を説明する。まず熱交換部（Ｐ）に収縮していない
状態の熱収縮チューブ（５０）を挿入しておき、入口側
バイブク４０）とキャピラリーチューブ（４２）、出口
側バイブ（４１）とサクションバイブ（４４）をそれぞ
れロウ付した後、とのロウ付した部分を中心として金属
表面が露出する部分、即ち例えば熱交換部（Ｐ）の途中
からフラッシュバット溶接部分にかけてまでを被覆する
ように熱収縮チューブ（５０）を移動し、加熱溶融樹脂
接着剤または発泡加熱樹脂接着剤（本例ではフオームメ
ルト剤（５１ａ）を使用する）をチューブ（５０）内に
充填する（第８図参照）、すると、このフオームメルト
剤（５１ａ）の熱（ちなみに噴出ノズル出口で約１８０
°Ｃ程度）により熱収縮チューブ（５０）が収縮すると
ともに、フオームメルト剤（５１ａ）自身が発泡して独
立気泡の発泡体となる。この収縮と発泡の相乗効果で、
熱収縮チューブ（５０）内のパイプ表面及びパイプ分岐
部（５２）やパイプ間の隙間（５３）に、確実にフォー
ムメルト剤（５１ａ）が流れ込み、熱収縮チューブ（５
０）内に空洞を形成することなく熱収縮チューブ（５０
）の接着固定ができる。Next, a working procedure for fixing this heat shrink tube (50) will be explained. First, insert the unshrinked heat shrink tube (50) into the heat exchange part (P), and then insert the inlet side vibrator 40), the capillary tube (42), the outlet side vibrator (41), and the suction vibrator (44). After brazing each, a heat shrink tube (50 mm ) and fill the tube (50) with a hot-melt resin adhesive or foamed hot-melt resin adhesive (foam-melt agent (51a) is used in this example) (see Fig. 8). Then, this foam The heat of the melt agent (51a) (by the way, the temperature at the outlet of the jet nozzle is about 180
degree Celsius), the heat-shrinkable tube (50) contracts, and the foam-melt agent (51a) itself foams to become a closed-cell foam. Due to the synergistic effect of this shrinkage and foaming,
The foam melting agent (51a) reliably flows into the pipe surface, the pipe branch part (52), and the gap (53) between the pipes in the heat shrink tube (50), and the heat shrink tube (50)
0) without forming a cavity within the heat shrink tube (50
) can be fixed with adhesive.
以上のように熱収縮チューブ（５０）を金属バイブに接
着するにあたり、ホットメルト剤やフオームメルト剤等
加熱して使用する樹脂接着剤（５１）をチューブ（５０
）内に充填させるようにしたことで、チューブ（５０）
を熱収縮させるための熱源を特別に用意する必要はなく
なる。また加熱して流動状の樹脂接着剤（５１）をチュ
ーブ（５０）中に充填することから、対象となる箇所が
分岐部（５２）やその近傍等形状の複雑な部分であって
も、その部分に十分に充填され確実なシール効果が得ら
れる。特に発泡加熱樹脂接着剤を使用すれば、接着剤の
発泡（約２．５〜３倍程度）と熱収縮チューブ（５０）
の収縮（径方向で３０〜４５％程度）の相乗効果により
、チューブ（５０）内の接着剤圧力が高められ、複雑な
形状の部位に対しても空洞を形成することなく接着剤を
充填できる。更に熱収縮チューブ（５０〉の内表面に確
実に接着剤（５０）の層を形成でき、かつ空洞を形成さ
せないため、何らかの原因でチューブ（５０）が損傷を
受け、亀裂や破損が生じても、金属表面が接着剤の層で
覆われているため裸出することがなく、防錆効果が損な
われない。そして、防錆の対象となる箇所の隅々にわた
り独立気泡の発泡体であるフオームメルト剤（５１ａ）
が充填できることから、複雑な形状の部分や複数本を合
体する部分等の防錆に対して特に有効に作用するととも
に、チューブ（５０）の装着に対する作業性が一段と向
上する。As described above, when bonding the heat shrink tube (50) to the metal vibrator, a resin adhesive (51) that is heated such as a hot melt agent or a foam melt agent is applied to the tube (50).
), the tube (50)
There is no need to prepare a special heat source for heat shrinking. In addition, since the tube (50) is filled with heated and fluidized resin adhesive (51), even if the target area is a complicated part such as a branch part (52) or its vicinity, The area is sufficiently filled and a reliable sealing effect can be obtained. Especially if you use a foamed heating resin adhesive, the foaming of the adhesive (approximately 2.5 to 3 times) and the heat shrink tube (50)
Due to the synergistic effect of the contraction (approximately 30 to 45% in the radial direction), the pressure of the adhesive inside the tube (50) is increased, allowing the adhesive to be filled into areas with complex shapes without forming cavities. . Furthermore, since a layer of adhesive (50) can be reliably formed on the inner surface of the heat shrink tube (50) and no cavities are formed, even if the tube (50) is damaged for some reason and cracks or breaks. Since the metal surface is covered with a layer of adhesive, it will not be exposed and the rust prevention effect will not be impaired.Furthermore, the foam, which is a closed cell foam, covers every corner of the area targeted for rust prevention. Melt agent (51a)
Since it can be filled with the tube (50), it is particularly effective in preventing rust in a part with a complicated shape or a part where a plurality of tubes are combined, and the workability for installing the tube (50) is further improved.
以上詳述したように本発明によれば、通常加熱して使用
する樹脂接着剤の加熱された状態の熱を利用して、熱収
縮チューブを熱収縮させているため、特別な熱源を用意
する必要はない。また熱収縮チューブの収縮する力によ
って接着剤の圧力が高められ、複雑な形状の部位に対し
て接着剤を充填させやすく、金属配管表面に空洞を生じ
ることがなくなり、確実なシール性を期待できる。As detailed above, according to the present invention, the heat-shrinkable tube is heat-shrinked using the heat of the resin adhesive that is normally heated, so a special heat source is prepared. There's no need. In addition, the pressure of the adhesive is increased by the shrinking force of the heat-shrinkable tube, making it easier to fill parts with complex shapes, eliminating the formation of cavities on the surface of the metal piping, and ensuring reliable sealing performance. .
各図は本発明の一実施例を示し、第１図は熱収縮チュー
ブを装着した状態の要部断面図、第２図は低温ショーケ
ースの外観斜視図、第３図は第２図のＡ−Ａ断面図、第
４図は内箱関連の分解斜視図、第５図は冷凍サイクルに
よる冷媒の流れを示す流れ図、第６図は第１図のＢ−Ｂ
断面図、第７図は第１図のＣ−Ｃ断面図、第８図は熱収
縮チューブを装着する操作手順の説明図である。
（１３）・・・主冷却器、 （１４）・・・補助冷却器
、 （２６）・・・圧縮機、 （２７）・・・凝縮器、
（４０）・・・入口側バイブ、（４１）・・・出口側
バイブ、（４２）・・・キャピラリーチューブ、 （
４４）・・・サクションバイブ、（４５）熱交換促進チ
ューブ、 （Ｐ）・・・熱交換部、（５０）・・・熱収
縮チューブ、 （５１）・・・樹脂接着剤、（５１ａ）
フオームメルト剤（発泡加熱樹脂接着剤）、（５２）・
・・バイブ分岐部、（５３）・・・バイブ間の隙間。Each figure shows an embodiment of the present invention. Figure 1 is a sectional view of the main part with a heat shrink tube attached, Figure 2 is a perspective view of the external appearance of the low temperature showcase, and Figure 3 is A of Figure 2. -A sectional view, Figure 4 is an exploded perspective view of the inner box, Figure 5 is a flow chart showing the flow of refrigerant in the refrigeration cycle, Figure 6 is B-B in Figure 1.
7 is a sectional view taken along the line CC in FIG. 1, and FIG. 8 is an explanatory diagram of the operating procedure for installing the heat shrink tube. (13)...Main cooler, (14)...Auxiliary cooler, (26)...Compressor, (27)...Condenser,
(40)...Inlet side vibe, (41)...Outlet side vibe, (42)...Capillary tube, (
44) Suction vibe, (45) Heat exchange promoting tube, (P) Heat exchange section, (50) Heat shrink tube, (51) Resin adhesive, (51a)
Foam melt agent (foamed heating resin adhesive), (52)・
... Vibrator branch, (53) ... Gap between the vibrators.
Claims (1)
ーブを装着するにあたり、加熱溶融樹脂接着剤又は発泡
加熱樹脂接着剤のような樹脂接着剤を加熱した状態で熱
収縮チューブと金属配管の間に介在させて、この熱を熱
源となし熱収縮チューブを金属配管に装着させることを
特徴とする金属配管の防錆方法。1. When attaching a heat-shrinkable tube for rust prevention to metal piping with an exposed surface, heat the heat-molten resin adhesive or foamed resin adhesive before attaching the heat-shrinkable tube and the metal piping. A method for preventing rust of metal piping, characterized by attaching a heat-shrinkable tube to the metal piping, which is inserted between the metal piping and uses this heat as a heat source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62032820A JPH0665918B2 (en) | 1987-02-16 | 1987-02-16 | Anticorrosion method for metal piping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62032820A JPH0665918B2 (en) | 1987-02-16 | 1987-02-16 | Anticorrosion method for metal piping |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63199991A true JPS63199991A (en) | 1988-08-18 |
| JPH0665918B2 JPH0665918B2 (en) | 1994-08-24 |
Family
ID=12369468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62032820A Expired - Fee Related JPH0665918B2 (en) | 1987-02-16 | 1987-02-16 | Anticorrosion method for metal piping |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0665918B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5854011A (en) * | 1981-09-19 | 1983-03-30 | 株式会社サンリツト産業 | Trouser |
| JPS6026409A (en) * | 1983-06-27 | 1985-02-09 | ラジエイシヨン・ダイナミツクス・インコ−ポレ−テツド | Sleeve for protecting joint |
-
1987
- 1987-02-16 JP JP62032820A patent/JPH0665918B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5854011A (en) * | 1981-09-19 | 1983-03-30 | 株式会社サンリツト産業 | Trouser |
| JPS6026409A (en) * | 1983-06-27 | 1985-02-09 | ラジエイシヨン・ダイナミツクス・インコ−ポレ−テツド | Sleeve for protecting joint |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0665918B2 (en) | 1994-08-24 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |