JPS59143630A - Manufacture of refractory composite pipe - Google Patents

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】 本発明は耐火性複合管の製造方法に関し、特に合成樹脂
管の外周面に耐火層を形成して耐火性複合Ｑｆとする方
法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a fire-resistant composite pipe, and more particularly to a method for forming a fire-resistant layer on the outer peripheral surface of a synthetic resin pipe to obtain a fire-resistant composite Qf.

近年用？ｔ・、鉛管、鋼屑等に代って各種合成樹脂管が
ますます多方面で用いられる様になってきた。これら合
成樹脂管のうち硬質塩化ビニル管（以下「１１蟲ビ管」
という）は価格の割に機械的強度が大きく物理的化学的
にもすぐれた性能を有しているので広範囲の用途に亘っ
て大量に使用されている。For recent years? Various types of synthetic resin pipes are increasingly being used in place of T.T., lead pipes, scrap steel, etc. in a wide variety of applications. Among these synthetic resin pipes, hard vinyl chloride pipes (hereinafter referred to as “11 PVC pipes”)
) is used in large quantities for a wide range of applications because it has high mechanical strength and excellent physical and chemical performance relative to its price.

Ｊｔ体的には１！ｉビ管は■耐水性があり、■酸やアル
カリにも侵されない、■軽くて丈夫である、■加熱軟化
の性質を利用すれば曲げなどの加工が自由であり接着剤
により簡単確実な接合ができる、Ｖユ）燃えにくく火災
の原因になる心配がない、（啄）凍結に対する耐拡性が
よい、■鋼管・鉛管は勿論鋼管に比べても安価である等
の特性を有する為、上水道用、薬液輸送用、衛生工事用
、海水輸送用。Jt body is 1! I-V pipes are: ■ Water resistant, ■ Not attacked by acids or alkalis, ■ Light and durable, ■ Can be bent or otherwise processed freely by taking advantage of its heat-softening properties, and can be easily and securely joined using adhesives. It has the following characteristics: it is difficult to burn, there is no risk of causing a fire, it has good expansion resistance against freezing, and it is cheaper than steel pipes and lead pipes, as well as steel pipes. For transportation of chemical solutions, sanitary construction, and seawater transportation.

電線管用９通信ケーブル保護用、天然ガスＬＰＧの輸送
用、深井戸のケージング用、その他多方面で使用されて
いる。It is used for protection of electrical conduits, communication cables, transportation of natural gas LPG, caging of deep wells, and many other applications.

ｌ、記塩ビ管の他にも（１）ポリプロピレン管は機械的
性質及び劇薬品性が良好でＨつ軽量であることから、又
（２）ポリエチレン省・は強靭で可撓性に富み向アルカ
リ性が良好で１．つ衛生的に無害であることから、又（
３）ポリブテン管は可撓性、向ストレスクランク性、＃
薬品性、溶剤接着性１強破裂強度に優れたものであるこ
とから夫々広く使用されている。これら以外にも機械的
にすぐれた安価な各種樹脂管が多方面で利用されている
。この様な合成樹脂管の用途の１つとして建築用に用い
る給排水管等があり、」−記特性からみて合成樹脂管の
用途として適正であると思われる。ところがオフィスや
マンション等の高層建築物における給排水管や配電管等
の工事に合成樹脂管を用いることに対して［耐火構造な
ど防火区画、防火壁、界！１ｔ、間仕切壁もしくは隔壁
を貫通する部分及び当該貫通する部分から夫々両側に１
１以上の距離にある部分を不燃材料で造ること（建築基
準法施行令第１２９条の２第１項７号）。」といった制
約があり、前記従来の合成樹脂管は上記施行令の不燃材
料には該出し得ないという問題があった。即ち熱可塑性
合成樹脂管は程度の差こそあれ１００〜２００°Ｃ程度
の熱で融着や変形を起すので、火災等による高熱の影響
を受ける建物のフロア等に設けた貫通口と管の外周との
ｕＭに隙間が発生し、該隙間が煙道になって各フロアに
煙や有毒ガスを拡散させるという危険性があり、中には
ポリエチレン管の様に着火すると溶融しつつよく燃える
ものもあり、耐火・耐熱性の点で問題があった。一方］
−記建築基準法を満足すべく鋼管を用いると、管内壁に
錆が発生する等合成樹脂管に劣る点があるため、熱可塑
性合成樹脂管に耐火性を与えるため耐火材で被覆すると
いう対策が考えられている。即ち合成樹脂管の外周に耐
火材を被覆したりあるいはライニング処理を施した耐火
性複合管が開発されているが、合成樹脂管本来の機能を
具備すると共に、熱に弱い合成樹脂材が直接外部に曝さ
れてないため、仮に火や熱の影響によって合成樹脂部分
が変形乃至燃焼しても外面の耐火材が変形せＩず、前記
貫通口と管の外面の間に隙間が生じず建築基質に適合す
ることができる。その為、今後この種の耐火性複合管の
需要は益々高まるものと考えられている。上記耐火性複
合管の製造にあたっては、従来は例えば塩ビ管を石綿で
被覆する場合、該塩ビ管より大きめの石綿パイプをつく
って嵌め合せるか、或は石綿を長いテープ状にして上記
塩ビ管に巻きつける等の必要がある。即ち上記石綿パイ
プ又はテープ状の石綿を製造する為の別の工程を必要と
し、耐火性複合管の製造コストが高くなっていた。そこ
で合成樹脂管にセメントモルタルやセラミックス等の耐
火材を直接被覆しようと考えたか、合成樹脂管の外周面
は滑面であるため耐火材かすべってイ」着困難であるし
、仮に付着できたとしてもこれらの耐火材を合成樹脂管
のまわりで乾燥又は硬化するまで保持する為の成形用型
を必要とすることになり、製造効率も低くやはり経済的
ではなかった。In addition to PVC pipes, (1) polypropylene pipes have good mechanical properties and chemical resistance, and are lightweight; (2) polyethylene pipes are strong, highly flexible, and are alkali-resistant. is good and 1. Also, since it is hygienically harmless,
3) Polybutene pipe is flexible, stress-resistant cranking property, #
They are widely used because of their excellent chemical properties, solvent adhesion, and 1-strong burst strength. In addition to these, various mechanically superior and inexpensive resin pipes are used in a wide variety of applications. One of the uses of such synthetic resin pipes is as water supply and drainage pipes used in construction, and in view of the characteristics described above, it is thought that the synthetic resin pipes are suitable for use. However, the use of synthetic resin pipes for construction of water supply and drainage pipes and distribution pipes in high-rise buildings such as offices and condominiums [fireproof structures, fireproof divisions, firewalls, etc.] 1t, the part penetrating the partition wall or bulkhead, and 1t on each side from the part penetrating the said part.
Parts located at a distance of 1 or more shall be made of noncombustible materials (Article 129-2, Paragraph 1, Item 7 of the Enforcement Order of the Building Standards Act). There was a problem in that the conventional synthetic resin pipes could not be classified as noncombustible materials under the enforcement ordinance. In other words, thermoplastic synthetic resin pipes are fused and deformed to varying degrees when exposed to heat of around 100 to 200°C, so the outer periphery of pipes and through-holes installed on the floors of buildings that are affected by high heat caused by fires, etc. There is a danger that a gap will occur between the uM and the uM, and this gap will become a flue and spread smoke and toxic gases to each floor. However, there were problems with fire resistance and heat resistance. on the other hand]
- When steel pipes are used to meet the Building Standards Act, they are inferior to synthetic resin pipes, such as rust forming on the inner walls of the pipes, so the countermeasure is to coat thermoplastic synthetic resin pipes with a fire-resistant material to give them fire resistance. is considered. In other words, fire-resistant composite pipes have been developed in which the outer periphery of a synthetic resin pipe is coated or lined with a fire-resistant material. Even if the synthetic resin part deforms or burns due to the influence of fire or heat, the outer fireproofing material will not be deformed and no gap will be created between the through hole and the outer surface of the pipe, allowing the building substrate to remain intact. can be adapted to. Therefore, it is thought that the demand for this type of fire-resistant composite pipe will continue to increase in the future. In the manufacture of the above-mentioned fire-resistant composite pipes, for example, when covering a PVC pipe with asbestos, it was conventional to make an asbestos pipe larger than the PVC pipe and fit it together, or to make asbestos into a long tape and cover it with asbestos. It is necessary to wrap it etc. That is, a separate process for manufacturing the asbestos pipe or tape-shaped asbestos is required, which increases the manufacturing cost of the fire-resistant composite pipe. Therefore, they thought of directly coating the synthetic resin pipe with a refractory material such as cement mortar or ceramics, but since the outer peripheral surface of the synthetic resin pipe is smooth, it is difficult for the refractory material to slip and adhere, and even if it could be attached, However, a mold for holding the refractory material around the synthetic resin pipe until it dries or hardens is required, and the manufacturing efficiency is also low, making it uneconomical.

未発明はこの様な状況を憂慮してなされたものであり、
」ユ記課題を解決して合成樹脂管の外周面に耐火層を形
成して耐火性複合管を経済的に製造する方法を提供しよ
うとするものである。The invention was made out of concern for this situation,
The object of the present invention is to provide a method for economically producing a fire-resistant composite pipe by forming a fire-resistant layer on the outer circumferential surface of a synthetic resin pipe by solving the above problems.

即ち一■−記目的を達成し得た本発明の構成とは、合成
樹脂管の外周面にすべり１トめ処理を施し、更にその外
周から耐火材を吹きつけて耐火層を形成することを要旨
とするものである。In other words, the structure of the present invention that achieves the above object is that the outer circumferential surface of the synthetic resin pipe is subjected to a first slip treatment, and a refractory layer is further formed by spraying a refractory material from the outer circumference. This is a summary.

以下実施例を示す図面に基づいて本発明の構成及び作用
効果を具体的に説明するが、下記実施例は一具体例にす
ぎず、もとより前Φ後記の趣旨に徴して設計を変更する
ことは、いずれも本発明の技術範囲に含まれる。The configuration and effects of the present invention will be explained below in detail based on the drawings showing the embodiments. However, the embodiments below are only one specific example, and the design may not be changed in keeping with the spirit of the above and below. , all of which are included in the technical scope of the present invention.

第１．２図は本発明方法の手順を例示する上半部破断説
明図、第３図は本発明方法によって得た耐火性複合管の
斜視図を示す。第１図は塩ビ管１の外周から塩ビ管ｌの
外周面に金網２を巻きつけた状態を示す。塩ビ管１の外
周面に直接セメントモルタル又はセラミックス等の耐火
材を吹きつけても外周面にはうまくのらずすべり落ちて
しまう為、その防止策として外周面に金網２を巻いてす
ベリ１１−め処理を施したものである。塩ビ管１の左右
の金網を巻いていない部分は他管との接続部分であり、
必要に応じて本発明と同様に製造される耐火性複合管継
手等が接続される。巻装した金網２は後記耐火材のすべ
り止め効果と同時に塩ビ管１の補強効果をも果し得るの
で塩ビ管１はかなり薄いものであってもよい。尚金網２
は帯状のものをゲートル巻きしてもよいし、広い面積の
ものを重ねる様に一気に巻き付けてもよい。第２図は」
−記金網２ですべり止めを施した塩ビ管１を管軸００の
まわりに回転させながら、ノズル５から耐火材４を吹き
つけている状態を示す。ノズル５からはセメントモルタ
ル又はセラミックス等のｉＭ人材４を金網の外周面１−
に噴射しつつＡ点からＢ点へむかって矢印方向（図の右
方向）へ移動させる。−力塩ビ管ｌは管軸００のまわり
に回転している為、ｔへり１１−め処理用金網２を巻き
つけた外周面Ｉ、に耐火層３が順次形成され、ノズル５
がＢ点に達して耐火層４の噴射を終えた時にはＡＢ間の
管外周面全体に亘って耐火層３が形成される。この後耐
火層３を乾燥・養生又は硬化処理等の手段によって安定
させると、第３図に示す様な耐火性複合管が完成する。FIG. 1.2 is an explanatory cutaway view of the upper half illustrating the procedure of the method of the present invention, and FIG. 3 is a perspective view of a refractory composite pipe obtained by the method of the present invention. FIG. 1 shows a state in which a wire mesh 2 is wound from the outer circumference of a PVC pipe 1 to the outer circumferential surface of a PVC pipe l. Even if cement mortar or a refractory material such as ceramics is sprayed directly onto the outer circumferential surface of the PVC pipe 1, it will not stick well to the outer circumferential surface and will slide down, so as a preventive measure, a wire mesh 2 is wrapped around the outer circumferential surface. - It has been subjected to a finishing process. The left and right parts of PVC pipe 1 that are not covered with wire mesh are the parts that connect to other pipes,
If necessary, a fire-resistant composite pipe joint or the like manufactured in the same manner as the present invention is connected. The wrapped wire mesh 2 can have the anti-slip effect of the refractory material described later as well as the reinforcing effect of the PVC pipe 1, so the PVC pipe 1 may be quite thin. Sho wire mesh 2
You may wrap a band-like material around a gaiter, or you may wrap a large area of material all at once so that it overlaps. Figure 2 is
- Shows a state in which refractory material 4 is being sprayed from nozzle 5 while rotating PVC pipe 1, which has been made non-slip with wire mesh 2, around the pipe axis 00. From the nozzle 5, the iM material 4 such as cement mortar or ceramics is applied to the outer peripheral surface 1- of the wire mesh.
While injecting, move from point A to point B in the direction of the arrow (rightward in the figure). - Since the PVC pipe l is rotating around the pipe axis 00, the refractory layer 3 is sequentially formed on the outer peripheral surface I around which the processing wire mesh 2 is wrapped around the edge 11, and the nozzle 5
When the refractory layer 4 reaches point B and the injection of the refractory layer 4 is completed, the refractory layer 3 is formed over the entire outer peripheral surface of the tube between AB. Thereafter, the fireproof layer 3 is stabilized by means such as drying, curing, or hardening, and a fireproof composite pipe as shown in FIG. 3 is completed.

耐火性複合管６は金網２を巻いて上へ耐火材４を吹きつ
けて形成されているので、塩ビ管ｌと耐火層３との接着
、結合状態がよく、強固な耐火性複合管６を得ることが
できる。The fire-resistant composite pipe 6 is formed by winding the wire mesh 2 and spraying the fire-resistant material 4 on top, so that the PVC pipe l and the fire-resistant layer 3 are bonded and bonded well, making the fire-resistant composite pipe 6 strong. Obtainable.

なお１、記ノズル５からの耐火材４の噴射量、塩ビ’ｒ
ｉ’　ｌの回転速度、イズル５の矢印方向への移動速度
等は、用いられる素材によって異なる耐火層３の厚さに
紀、して適宜設定すればよい。次に第４図は本発明方法
の他の方法を例示する一部破断説明図であり、塩ビ管１
の外周面に第１図で示した金網２の代りに布製又はプラ
スチック酸のすだれ織７を巻きつけている状態を示す。In addition, 1. The injection amount of the refractory material 4 from the nozzle 5, PVC'r
The rotational speed of i'l, the moving speed of the whistle 5 in the direction of the arrow, etc. may be appropriately set depending on the thickness of the refractory layer 3, which varies depending on the material used. Next, FIG. 4 is a partially cutaway explanatory diagram illustrating another method of the present invention, in which a PVC pipe 1
This figure shows a state in which a blind weave 7 made of cloth or plastic acid is wrapped around the outer peripheral surface of the wire mesh 2 instead of the wire mesh 2 shown in FIG.

第４図のＣ点とＤ点の間にすだれ織７を巻きつけた後、
第３図と同じ手段によってすだれ織７上にセメントモル
タル又はセラミックス等の耐火材４を吹きつけて耐火層
３を形成することによって第３図と同じ様な外観を呈す
る耐火性複合管が得られる。すへりＩＩ−め処理には」
−記実施例で示した金網、すだれ織の他に、ガラスマン
トや単なる線条物を巻きつけてもよい。又他の手段とし
て速乾性の粘着剤等を塩ビ管ｌの外周トに塗布してすベ
リ止めとし、そのにに前記の耐火材等を吹きつけて耐火
層を形成してもよく、更には合成樹脂管の外周面に任意
の方法で凹凸加工（螺旋状スリットや軸心方向スリット
、サンドブラスト処理等）を施してすベリ止めをするこ
ともできる。After wrapping the blind weave 7 between points C and D in Figure 4,
By spraying a refractory material 4 such as cement mortar or ceramics onto the blind weave 7 to form a refractory layer 3 using the same method as shown in Fig. 3, a refractory composite pipe having an appearance similar to that shown in Fig. 3 can be obtained. . For Suhari II-me processing.”
- In addition to the wire mesh and blind weave shown in the above embodiments, a glass cloak or a simple filament may be wrapped around the fabric. As another method, a quick-drying adhesive or the like may be applied to the outer periphery of the PVC pipe l to prevent it from slipping, and the above-mentioned refractory material or the like may be sprayed thereon to form a fireproof layer. The outer peripheral surface of the synthetic resin pipe can be textured by any method (such as spiral slits, axial slits, sandblasting, etc.) to prevent slippage.

本発明は以−にの様に構成されており１合成樹脂管の外
周にすベリＩＪ二め処理を施しただけで合成樹脂省を直
接耐火材で被覆できるので低コストの耐火性複合管が製
造でき、又金網、すだれ織、線条物等ですへり１１め処
理を施した場合には、合成樹脂管の引張荷重、＃ｉ蛤等
に対する補強をした耐火用複合管を製造できる様になっ
た。The present invention is constructed as described below, and the synthetic resin can be directly coated with a fire-resistant material by simply applying IJ treatment to the outer periphery of the synthetic resin pipe, resulting in a low-cost fire-resistant composite pipe. In addition, if the edges are treated with wire mesh, blind weave, filament, etc., it is now possible to manufacture fire-resistant composite pipes that are reinforced against the tensile load of synthetic resin pipes, #i clams, etc. Ta.

【図面の簡単な説明】[Brief explanation of the drawing]

第１，２図は本発明方法の手順を例示する上半部破断説
明図、第３図は本発明方法によって得た耐火性複合／６
の斜視図および第４図は本発明の他の方〃、を例示する
ー・部破断説明図を示す。 １・・・硬質塩化ビニル管　　　２・・・金網３・・・
耐火層　　　　　　　　４・・・耐火材５・・・ノズル
　　　　　　　　６・・・耐火性複合管７・・・すだれ
織 出願人　久保田鉄上株式会社Figures 1 and 2 are upper half broken explanatory diagrams illustrating the procedure of the method of the present invention, and Figure 3 is a fire-resistant composite/6 obtained by the method of the present invention.
The perspective view and FIG. 4 are partially broken explanatory views illustrating another aspect of the present invention. 1... Hard vinyl chloride pipe 2... Wire mesh 3...
Fireproof layer 4...Fireproof material 5...Nozzle 6...Fireproof composite pipe 7...Sudare weave Applicant Kubota Tetsujo Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 合成樹脂管の外周面にすべり止め処理を施し、史にその
外周から耐火材を吹きつけて耐火層を形成することを特
徴とする耐火性複合管の製造方法。A method for manufacturing a fire-resistant composite pipe, characterized by applying anti-slip treatment to the outer peripheral surface of a synthetic resin pipe and spraying a fire-resistant material from the outer periphery to form a fire-resistant layer.