JPH02278097A - Joint structure for heat insulating cast iron pipe and method of mounting joint at site - Google Patents
Joint structure for heat insulating cast iron pipe and method of mounting joint at siteInfo
- Publication number
- JPH02278097A JPH02278097A JP7802789A JP7802789A JPH02278097A JP H02278097 A JPH02278097 A JP H02278097A JP 7802789 A JP7802789 A JP 7802789A JP 7802789 A JP7802789 A JP 7802789A JP H02278097 A JPH02278097 A JP H02278097A
- Authority
- JP
- Japan
- Prior art keywords
- heat insulating
- sleeve
- cast iron
- pipe body
- insulating material
- 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
- 229910001018 Cast iron Inorganic materials 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title abstract 2
- 229920005989 resin Polymers 0.000 claims abstract description 22
- 239000011347 resin Substances 0.000 claims abstract description 22
- 239000011810 insulating material Substances 0.000 claims abstract description 16
- 239000011241 protective layer Substances 0.000 claims description 22
- 239000010410 layer Substances 0.000 claims description 14
- 238000010276 construction Methods 0.000 claims description 8
- 239000011550 stock solution Substances 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 abstract description 6
- -1 polyethylene Polymers 0.000 abstract description 6
- 229920000573 polyethylene Polymers 0.000 abstract description 6
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 abstract description 5
- 230000002093 peripheral effect Effects 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 abstract 1
- 238000005187 foaming Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 238000009413 insulation Methods 0.000 description 6
- 239000006260 foam Substances 0.000 description 5
- 239000011490 mineral wool Substances 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000004794 expanded polystyrene Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
Landscapes
- Thermal Insulation (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は流体輸送用の管本体を鋳鉄管とする断熱二重管
の継手構造及び現場継手施工法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a joint structure and on-site joint construction method for a heat-insulating double pipe in which the main body of the pipe for fluid transport is a cast iron pipe.
（従来の技術）
従来は第２図に示すように、鋳鉄管でつくられた流体輸
送用の管本体（１１）の外周面を全周にわたって硬質ウ
レタンフオームからなる断熱材Ｆｉ（１２）で囲うと共
に、その断熱材層（１２）の外周面を全周にわたって鋼
管や合成樹脂でつくられた保護層（１３）で被覆する。(Prior Art) Conventionally, as shown in Fig. 2, the outer peripheral surface of a fluid transport pipe body (11) made of a cast iron pipe is surrounded all around with a heat insulating material Fi (12) made of hard urethane foam. At the same time, the outer peripheral surface of the heat insulating material layer (12) is covered all around with a protective layer (13) made of steel pipe or synthetic resin.
それから、管本体（１１） 。Then, the tube body (11).
（１１）を接続し、管本体（１１）、 （１１）の接
続部（１４）を断熱材（１５）、 （１６）と外装材
（１７）で囲んで断熱鋳鉄管を構成している。(11) are connected, and the pipe body (11) and the connecting portion (14) of (11) are surrounded by heat insulating materials (15), (16) and exterior material (17) to form an insulated cast iron pipe.
前記接続部（１４）については、雄雌一対の嵌合部分（
Ｉ１Ａ）、 （Ｉ１Ｂ）の一方を管本体（１１）の一
端に、他方を管本体（１１）の他端に一体連設して、こ
れら嵌合部分（Ｉ１Ａ）、 （Ｉ１Ｂ）とを直接嵌合
して、管本体（１１） 、 （１１）の前記接続部（
１４）を形成している。Regarding the connecting portion (14), a pair of male and female fitting portions (
One of I1A) and (I1B) is integrally connected to one end of the tube body (11) and the other is integrally connected to the other end of the tube body (11), and these fitting parts (I1A) and (I1B) are directly fitted. Together, the tube bodies (11) and the connection portions (11)
14).
前記接続部（１４）を囲む断熱材については、接続部（
１４）の全周にわたって直接被覆して、その外表面に滑
らかな円筒面を形成する不定形断熱材ｒ５（１５）をロ
ックウールやガラスウール等で形成し、不定形断熱材層
（１５）の全体を囲う成形断熱材層（１６）を硬質ウレ
タンフオームで形成している。なお、前記成形断熱材層
（１６）は円筒状の硬質ウレタンフオームを周方向にお
いて二分割、あるいは三分割してなる断面Ｃ形の成形品
から成っている。Regarding the heat insulating material surrounding the connection part (14), the connection part (
14) is directly coated over the entire circumference to form a smooth cylindrical surface on the outer surface of the amorphous heat insulating material r5 (15) made of rock wool, glass wool, etc. A molded heat insulating layer (16) surrounding the entire structure is made of hard urethane foam. The molded heat insulating material layer (16) is a molded product having a C-shaped cross section, which is obtained by dividing a cylindrical hard urethane foam into two or three parts in the circumferential direction.
前記外装材（１７）は、熱収縮性の合成樹脂チューブか
ら成り、一方の管本体（１１）の保護層（１３）と他方
の管本体（１１）の保護層（１３）とに嵌め込んで、接
続部（１４）を囲う断熱材（１５）、 （１６）全体
を被覆した状態で、加熱して収縮させ、両保護Ｆｊｉ
（１３） 、 （１３）の外周面と断熱材（１６）の
外周面とに密接させ、接続部（１４）を液密にしている
。なお、図中、（１８）はリング状ゴムパツキンで、再
嵌合部分（Ｉ１Ａ）、 （Ｉ１Ｂ）間のシールを行な
うものである。The exterior material (17) is made of a heat-shrinkable synthetic resin tube, and is fitted into the protective layer (13) of one tube body (11) and the protective layer (13) of the other tube body (11). , the insulation material (15) surrounding the connection part (14), (16) is heated and shrunk to cover both the protective Fji
(13), the outer circumferential surface of (13) and the outer circumferential surface of the heat insulating material (16) are brought into close contact to make the connecting portion (14) liquid-tight. In the figure, (18) is a ring-shaped rubber gasket, which seals between the refitting parts (I1A) and (I1B).
（発明が解決しようとする課題）
上述した従来の鋳鉄管を管本体とする二重断熱管におい
ては、接続部（１４）の一方の雌型嵌合部分（Ｉ１Ｂ）
の外径寸法りと硬質断熱材層（１２）の厚みｌとの兼ね
合いで、雌型嵌合部分（１１Ｂ ）の外径が保護層（１
３）の外径よりも大になることが多い。また管本体（１
１）の直径が異なれば、接続部の寸法も変わるため、種
々の寸法を持った多数の成形断熱材層（１６）を用意す
る必要があった。(Problems to be Solved by the Invention) In the above-mentioned conventional double-insulated pipe whose main body is a cast iron pipe, one female fitting part (I1B) of the connecting part (14)
The outer diameter of the female fitting part (11B) is the same as the protective layer (1
It is often larger than the outer diameter of 3). Also, the tube body (1
1), the dimensions of the connection part also vary, so it was necessary to prepare a large number of molded insulation layers (16) with various dimensions.
０ｔ
また、ロックウール（１５）等を前記接続部（１４）の
全周の不定形部にその外表面が滑らかな円筒面（直径Ｌ
）を形成するよう手作業で巻きつけるために手間がかか
るといった欠点があった。0t Also, apply rock wool (15) or the like to the irregularly shaped part around the entire circumference of the connection part (14), which has a smooth cylindrical surface (diameter L).
), which requires a lot of effort and effort.
したがって、本発明の目的とするところは鋳鉄管を管本
体とする断熱二重管の現場継手施工法において種々の寸
法の成形断熱材層（１６）を用意する必要をなくし、そ
の上、上記施工が簡単に行なえるようにするにあり、ま
た新規で、しかも改良された継手構造を提供するにある
。Therefore, an object of the present invention is to eliminate the need for preparing molded insulation layers (16) of various dimensions in the field joint construction method of insulated double pipes having cast iron pipes as pipe bodies, and to eliminate the need for the above-mentioned construction. The object of the present invention is to provide a new and improved joint structure.
（課題を解決するための手段）
本発明の一番目の特徴とするところは、ｖＰ鉄製管本体
（１） を断熱材１’ｊｉ （２） ト保護層（３）と
で被覆し、一方の管本体（１）・端部に一体連設した誰
型嵌合部分（１Ａ）と他方の管本体（１）端部に一体連
設した雌型嵌合部分（１Ｂ）とを直接嵌合して接続部（
４）を形成すると共に、前記接続部（４）に発泡性樹脂
（５）を延伸性のある樹脂製スリーブ（６）と熱収縮チ
ューブ（７）とで封着した断熱鋳鉄管の継手構造にある
。(Means for Solving the Problems) The first feature of the present invention is that the vP iron pipe body (1) is covered with a heat insulating material (2) and a protective layer (3). Directly fit the whorled fitting part (1A) integrally connected to the end of the tube body (1) with the female fitting part (1B) integrally connected to the end of the other tube body (1). connection part (
4) and a joint structure of an insulated cast iron pipe in which the foamed resin (5) is sealed to the connection part (4) with a stretchable resin sleeve (6) and a heat shrinkable tube (7). be.
また、本発明の二番目の特徴とするところは、鋳鉄管本
体（１）の一方の保護層（３）に延伸性のある樹脂製ス
リーブ（６）と熱収縮チューブ（７）とを嵌め込み、次
いで前記管本体（１）、 （１）の雄雌型嵌合部分（Ｌ
Ａ）、 （１Ｂ）を直接嵌合すると共に、前記樹脂製
スーリーブく６）を前記管本体（１）の他方の保護層（
３）に嵌め込んだ後、前記樹脂製スリーブ（６）の注入
口（６Ａ）より発泡性樹脂の原液を売場して発泡固化せ
しめ、しかる後、熱収縮チューブ（７）を前記管本体（
１）の他方の保護層（３）に嵌め込んで熱収縮させる断
熱鋳鉄管の現場継手施工法にある。The second feature of the present invention is that a stretchable resin sleeve (6) and a heat shrink tube (7) are fitted into one protective layer (3) of the cast iron pipe body (1). Next, the male and female fitting portions (L) of the tube body (1), (1)
A) and (1B) are directly fitted together, and the resin sleeve 6) is fitted onto the other protective layer (1) of the tube body (1).
3), a stock solution of foamable resin is poured into the outlet (6A) of the resin sleeve (6) to foam and solidify, and then the heat shrink tube (7) is inserted into the tube body (6).
This is a construction method for on-site fitting of insulated cast iron pipes, which is fitted into the other protective layer (3) of 1) and heat-shrinked.
（作 用）
特に、雌型嵌合部分（Ｉ Ｂ）の外径が保護層（３）の
外径より相・当に大きくなっても、延伸性のある樹脂製
スリーブ（６）の注入口（６Ａ）から接続部（４）に発
泡性樹脂の原液を売場すれば、発泡固化して接続部（４
）のまわりを自在に発泡性樹脂で包んで十分に断熱する
ことができ、さらに熱収縮スリーブ（７）により接続部
（４）の液密性を確保することも従来同様に行うことが
できる。(Function) In particular, even if the outer diameter of the female fitting part (I B) becomes considerably larger than the outer diameter of the protective layer (3), the injection port of the extensible resin sleeve (6) If you pour the foamable resin stock solution from (6A) to the connection part (4), it will foam and solidify.
) can be freely wrapped with foamed resin to provide sufficient insulation, and furthermore, the liquid-tightness of the connection part (4) can be ensured using the heat shrink sleeve (7) in the same manner as in the past.
（実施例） 本発明の一実施例につき、第１図を参照して説明する。(Example) One embodiment of the present invention will be described with reference to FIG.
（１）は温水、冷水、蒸気等を流す鋳鉄製管本体で、（
１Ａ）は一方の管本体（１）の雄型嵌合部分を、（１Ｂ
）は他方の管本体（１）の雌型嵌合部分をそれぞれ示す
。（２）は管本体（１）の外周面を全周にわたって囲う
硬質ウレタン等の断熱材層である。また（３）は前記断
熱材層（２）の外周面を全周にわたって包み込む保護層
で、鋼管や合成樹脂管等から成っている。（４）は管本
体（１）、 （１）の接続部で、該接続部（４）は発
泡スチロール等の発泡性樹脂から成る断熱材層（５）で
十分に覆われている。そして、前記断熱材層（５）の外
側面を延伸性のあるポリエチレンスリーブく６）が囲み
、そのスリーブ（６）の両端部は保護Ｎ（３）上でバン
ド締めされている。（７）はプラスチック製の熱収縮ス
リーブで、接続部最外側にあって、ポリエチレンスリー
ブ（６）と保護層（３）の両表面にぴったりと密着して
接続部（４）の液密性を確保するものである。なお、熱
収縮スリーブ（７）に代えて熱収縮シートで接続部最外
側を被包させるようにしてもよい。(1) is a cast iron pipe body that carries hot water, cold water, steam, etc.
1A) is the male fitting part of one tube body (1), (1B
) respectively indicate the female fitting portion of the other tube body (1). (2) is a layer of heat insulating material such as hard urethane that surrounds the entire outer peripheral surface of the tube body (1). Further, (3) is a protective layer that wraps around the entire outer peripheral surface of the heat insulating material layer (2), and is made of a steel pipe, a synthetic resin pipe, or the like. (4) is a connecting portion between the tube bodies (1) and (1), and the connecting portion (4) is sufficiently covered with a heat insulating layer (5) made of a foamed resin such as expanded polystyrene. A stretchable polyethylene sleeve 6) surrounds the outer surface of the heat insulating layer (5), and both ends of the sleeve (6) are banded onto the protective N (3). (7) is a plastic heat-shrinkable sleeve that is located on the outermost side of the connection and tightly adheres to both surfaces of the polyethylene sleeve (6) and the protective layer (3) to ensure the liquid-tightness of the connection (4). It is to be ensured. Note that instead of the heat-shrinkable sleeve (7), the outermost part of the connection part may be covered with a heat-shrinkable sheet.
（８）はリング状ゴムパツキンである。(8) is a ring-shaped rubber gasket.
次に、上記構成からなる断熱二重管の現場継手施工法に
つき説明すると、先づ、一方の管本体（１）の保護層（
３）、例えば第１図において左側の鋼管端部にポリエチ
レンスリーブ（６）と熱収縮スリーブ（７）を共に嵌め
込み、前記ポリエチレンスリーブ（６）の左端部を保護
層（３）の鋼管にバンド締めして取りつけ、それから管
本体（１）、 （１）の雌雄嵌合部分（ＬＡ）、
（１Ｂ＞を直接嵌合し、次いで前記ポリエチレンスリー
ブ（６）の右端部を他方の管本体（１）の保護層（３）
である右側の鋼管端部に嵌め込み、その左端部と同様に
保護層（３）の鋼管にハンド締めして取りつける。Next, to explain the on-site joint construction method for the insulated double pipe with the above configuration, first, the protective layer (
3) For example, in Fig. 1, fit a polyethylene sleeve (6) and a heat shrink sleeve (7) together into the left end of the steel pipe, and tighten the left end of the polyethylene sleeve (6) to the steel pipe of the protective layer (3) with a band. Then, attach the tube body (1), the male and female mating parts (LA) of (1),
(1B>), and then connect the right end of the polyethylene sleeve (6) to the protective layer (3) of the other tube body (1).
Insert it into the right end of the steel pipe, and hand-tighten it to the steel pipe of the protective layer (3) in the same way as the left end.
しかる後、前記ポリエチレンスリーブ（６）の注入口（
６Ａ）より、例えば発泡スチーロルの原液を充填すると
、直ちに膨張固化して接続部（４）のまわりに十分な厚
みの断熱層（５）を形成する。After that, the injection port (
6A), for example, when the stock solution of foamed steel is filled, it immediately expands and solidifies to form a sufficiently thick heat insulating layer (5) around the connection part (4).
最後に、左側の鋼管に寄せてあった熱収縮チューブ（７
）の右端側を右側の管本体（１）端部に嵌め込んでから
、バーナ等により加熱すれば、熱収縮チューブ（７）の
収縮により継手部（４）に対する液密性を十分なものと
することができる。Finally, the heat shrink tube (7
) into the end of the right tube body (1) and then heat it with a burner etc., the heat shrink tube (7) will shrink and provide sufficient liquid tightness to the joint (4). can do.
（発明の効果）
本発明は上述の説明か゛ら明らかなように、［断熱鋳鉄
管の接続部（４）における一方の雌型嵌合部分（１Ｂ）
の外径が保護層（３）の外径より大で、断熱鋳鉄管より
周囲に相当に突出する場合でも、接続部（４）を包んだ
延伸性のある樹脂製スリーブの注入口（６Ａ）より発泡
性樹脂の原液を充填して発泡固化すれば、接続部（４）
のまわりを自在に発泡樹脂（５）で包んで十分に断熱す
ることができ、従来のように接続部のまわりにロックウ
ール等を手作業で巻きつけ、その上、成形断熱材層を被
覆する必要がないから、現場で簡単に継手施工を行うこ
とができる。また、雌型嵌合部分の外径に等しい内径の
種々の寸法を持った成形断熱材層を用意することもない
ので、施工費用を低減できる利点もある。(Effects of the Invention) As is clear from the above description, the present invention provides the following advantages:
The inlet (6A) of the extensible resin sleeve encasing the connection (4), even if the outer diameter of the protective layer (3) is larger than the outer diameter of the protective layer (3) and protrudes considerably beyond the insulated cast iron pipe. If the stock solution of foamable resin is filled and foamed and solidified, the connection part (4)
You can freely wrap the area around the connection part with foamed resin (5) to provide sufficient insulation, and as in the past, you can manually wrap rock wool, etc. around the connection part, and then cover it with a molded insulation layer. Since there is no need for this, joint construction can be easily carried out on site. Further, since there is no need to prepare molded heat insulating material layers having various dimensions with an inner diameter equal to the outer diameter of the female fitting portion, there is an advantage that construction costs can be reduced.
第１図は本発明の一実施例を示す断熱鋳鉄管の縦断面図
、第２図は従来の断熱鋳鉄管の縦断面図をそれぞれ示す
。
（１”）−−−−−一鋳鉄製管本体、（２）−−−−一
断熱材層、（３）−・−・保護層、（４）−・−・接続
部、く５）・発泡性樹脂、（６） −一一一−−−延伸
性のある樹脂製スリーブ、（７） −一一一一一一熱収
縮スリーブ。FIG. 1 is a longitudinal sectional view of an insulated cast iron pipe showing an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of a conventional insulated cast iron pipe. (1”)------1 Cast iron pipe body, (2)---1 Heat insulation layer, (3)---Protective layer, (4)---Connection part, 5) - Foamable resin, (6) -111---Stretchable resin sleeve, (7) -11111 heat shrinkable sleeve.
Claims (1)
とで被覆し、一方の管本体（１）端部に一体連設した雄
型嵌合部分（１Ａ）と他方の管本体（１）端部に一体連
設した雌型嵌合部分（１Ｂ）とを直接嵌合して接続部（
４）を形成すると共に、前記接続部（４）のまわりに発
泡性樹脂（５）を延伸性のある樹脂製スリーブ（６）と
熱収縮チューブ（７）とで封着したことを特徴とする断
熱鋳鉄管の継手構造。 ２、鋳鉄管本体（１）の一方の保護層（３）端部に延伸
性のある樹脂製スリーブ（６）と熱収縮チューブ（７）
とを嵌め込み、次いで前記管本体（１）、（１）の雄雌
型嵌合部分（１Ａ）、（１Ｂ）を直接嵌合すると共に、
前記樹脂製スリーブ（６）を前記管本体（１）の他方の
保護層（３）に嵌め込んだ後、前記樹脂製スリーブ（６
）の注入口（６Ａ）より発泡性樹脂の原液を充填して発
泡固化せしめ、しかる後熱収縮チューブ（７）を前記管
本体（１）の他方の保護層（３）に嵌め込んで熱収縮さ
せることを特徴とする断熱鋳鉄管の現場継手施工法。[Claims] 1. The cast iron pipe body (1) has a heat insulating material layer (2) and a protective layer (3).
A male fitting part (1A) integrally connected to the end of one tube body (1) and a female fitting part (1B) integrally connected to the end of the other tube body (1). and the connecting part (
4), and the foamed resin (5) is sealed around the connection part (4) with a stretchable resin sleeve (6) and a heat shrinkable tube (7). Fitting structure for insulated cast iron pipes. 2. A stretchable resin sleeve (6) and a heat shrink tube (7) at one end of the protective layer (3) of the cast iron pipe body (1)
and then directly fit the male and female fitting portions (1A) and (1B) of the tube bodies (1) and (1),
After fitting the resin sleeve (6) into the other protective layer (3) of the tube body (1), the resin sleeve (6)
) is filled with a stock solution of foamable resin through the injection port (6A) and foamed and solidified, and then the heat-shrinkable tube (7) is fitted into the other protective layer (3) of the tube body (1) and heat-shrinked. An on-site joint construction method for insulated cast iron pipes, which is characterized by the following:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7802789A JPH02278097A (en) | 1989-03-31 | 1989-03-31 | Joint structure for heat insulating cast iron pipe and method of mounting joint at site |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7802789A JPH02278097A (en) | 1989-03-31 | 1989-03-31 | Joint structure for heat insulating cast iron pipe and method of mounting joint at site |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02278097A true JPH02278097A (en) | 1990-11-14 |
Family
ID=13650330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7802789A Pending JPH02278097A (en) | 1989-03-31 | 1989-03-31 | Joint structure for heat insulating cast iron pipe and method of mounting joint at site |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02278097A (en) |
-
1989
- 1989-03-31 JP JP7802789A patent/JPH02278097A/en active Pending
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