JPH068390Y2 - FRP tubular body connection structure - Google Patents
FRP tubular body connection structureInfo
- Publication number
- JPH068390Y2 JPH068390Y2 JP1989054223U JP5422389U JPH068390Y2 JP H068390 Y2 JPH068390 Y2 JP H068390Y2 JP 1989054223 U JP1989054223 U JP 1989054223U JP 5422389 U JP5422389 U JP 5422389U JP H068390 Y2 JPH068390 Y2 JP H068390Y2
- Authority
- JP
- Japan
- Prior art keywords
- frp
- connection structure
- pipe
- tubular body
- pipes
- 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 - Lifetime
Links
Landscapes
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、繊維強化プラスチック材からなるＦＷ管同士
又はＦＷ管とＦＲＰ継手など、いわゆるＦＲＰ製管状体
の接続構造に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a connection structure of so-called FRP tubular bodies such as FW pipes made of fiber reinforced plastic material or FW pipes and FRP joints.
従来、ＦＷ管同士又はＦＷ管とＦＲＰエルボ，ノズル，
フランジ等は通常バットジョイント法で接続される。こ
れをさらに詳しく第３図〜第５図に基づき説明すると、
第３図は内径Ｄが５００mm，肉厚９mmのＦＷ管１，１同
士の突合せ部分の外側にハンドレイアップ工法により幅
寸法Ｌ１が５００mmのＦＲＰ材２を積層外張りし両管
１，１をバットジョイントした場合、第４図は第３図に
示す接続部にさらに幅寸法Ｌ３が１００mmのＦＲＰ材４
をハンドレイアップによる内張りした場合、又第５図は
第３図に示す接続部に幅寸法Ｌ４が２００mmのＦＲＰ材
５を内張りした場合を示すが、上記の接続による破壊内
圧は第３図の場合は４１２×１０４Ｐａ（４２kgｆ／cm
2）であるが、第３図の外張りに加えて内張りした第４
図の場合は７２６×１０４Ｐａ（７４kgｆ／cm2）、ま
た第５図の場合は７３６×１０４Ｐａ（７５kgｆ／c
m2）でも破壊せずとなり、内張りによる外張り接続管体
の内圧強度が大巾に向上することが分っている。Conventionally, FW pipes or FW pipes and FRP elbows, nozzles,
Flange etc. are usually connected by the butt joint method. This will be described in more detail with reference to FIGS. 3 to 5,
FIG. 3 shows that the FW pipes 1 and 1 having an inner diameter D of 500 mm and a wall thickness of 9 mm are laminated on the outer side of the abutting portion of the FW pipes 1 and 1 with a hand lay-up method, and a FRP material 2 having a width dimension L 1 of 500 mm is laminated on the outer side of both pipes 1 and 1. When a butt joint is used, the FRP material 4 having a width L 3 of 100 mm is further added to the connecting portion shown in FIG.
5 is lined by hand lay-up, and FIG. 5 shows the case where the connection portion shown in FIG. 3 is lined with FRP material 5 having a width L 4 of 200 mm. In the case of 412 × 10 4 Pa (42 kgf / cm
2 ), but in addition to the outer lining shown in FIG.
In the case of the figure, it is 726 × 10 4 Pa (74 kgf / cm 2 ), and in the case of FIG. 5, it is 736 × 10 4 Pa (75 kgf / c 2 ).
It has been found that even with m 2 ), it does not break, and the internal pressure strength of the external connection pipe is greatly improved by the internal lining.
〔考案が解決しようとする課題〕 上記のように、接続部における内張りは接続管の内圧強
度向上に有効であるが、作業者が管内部に入りこみ内張
りが可能なのは長尺管においては管の内径１０００mm以
上を必要とし、これ以下の中，小口径品においては腕の
届く範囲の接続部を除いては内張りは困難である。従っ
て、ＦＲＰ材による外張りだけで接続するか、又小口径
の継手などにおいては差し込みだけで接続することが多
かった。しかしながら、このような場合には当然耐圧強
度は低くなり、２００以下の小口径管であればともか
く、５００〜８００程度の中口径管では常用圧力９
８×１０４Ｐａ（１０kgｆ／cm2）の管に必要な安全率
８倍（強化プラスチック協会規格「接触圧成形による強
化プラスチック製耐食機器に関する製品基準ＦＲＰＳＣ
００１」）を確保することは困難である。[Problems to be solved by the invention] As described above, the lining at the connection portion is effective for improving the internal pressure strength of the connecting pipe, but the operator can enter the inside of the pipe and perform the lining inside the long pipe. It requires 1000 mm or more, and it is difficult to lining the medium and small caliber products less than 1000 mm except for the connecting part within the reach of the arm. Therefore, it is often the case that the connection is made only by the outer coating made of the FRP material, or in the case of a small-diameter joint or the like, only the connection is made. However, in such a case, the compressive strength is naturally low, and a medium pressure pipe of about 500 to 800 has a normal pressure of 9 mm regardless of the small diameter pipe of 200 or less.
8 times the safety factor required for 8 × 10 4 Pa (10 kgf / cm 2 ) pipe (Reinforced Plastics Association standard “Product standard FRPSC for reinforced plastic corrosion resistant equipment by contact pressure molding”
001 ”) is difficult to secure.
本考案は上記の問題点に鑑みなされたものであり、内張
り作業が困難な小，中口径管の場合にも内圧強度が大き
いＦＲＰ管状体の接続構造を提供することを目的として
いる。The present invention has been made in view of the above problems, and it is an object of the present invention to provide a connection structure of an FRP tubular body having a high internal pressure strength even in the case of a small or medium diameter pipe in which the lining work is difficult.
ＦＷ管同士のバットジョイント接続あるいは、ＦＷ管と
ＦＲＰ継手などとの接続品に対し耐圧試験を行うと、接
続部の層間剥離が生ずる。When a pressure resistance test is performed on a butt joint connection of FW pipes or a connection product of an FW pipe and an FRP joint, delamination of the connection portion occurs.
そして上記層間剥離は補強繊維とマトリックスの樹脂間
あるいは補強繊維自体の切断によって剪断隙間が生じ、
この隙間がつらなってできた通路から圧力が抜けるため
強度的に破壊に到らず多くは周方向にふくらみ隙間から
内容物が噴出する。And the above-mentioned delamination causes a shear gap between the reinforcing fiber and the resin of the matrix or by cutting the reinforcing fiber itself,
Since the pressure escapes from the passage formed by this gap, strength is not destroyed and most of the contents bulge in the circumferential direction and the contents are ejected from the gap.
出願人は上記の点に鑑み種々検討を行った結果、層間剥
離による隙間のつながりができやすい接続部の内側にＦ
ＲＰ材によるハンドレイアップ処理の代りにゴム系の接
着材等の塗布により密着力の強い弾性皮膜を形成すると
耐圧性が向上することを見出した。The applicant has conducted various studies in view of the above points, and as a result, the F
It has been found that the pressure resistance is improved by forming an elastic film having a strong adhesive force by applying a rubber adhesive or the like instead of the hand lay-up treatment with the RP material.
すなわち、本考案におけるＦＲＰ製管状体の接続構造
は、ＦＷ管同士又はＦＷ管とＦＲＰ継手等の接続部の外
側にＦＲＰ材を積層するとともに、前記接続部の内側
に、ゴム系接着剤又は合成樹脂を塗布し弾性皮膜を形成
してなるものである。That is, in the connection structure of the FRP tubular body according to the present invention, the FRP material is laminated on the outside of the connection part such as the FW pipes or the connection part of the FW pipe and the FRP joint, and the rubber-based adhesive or the synthetic material is formed inside the connection part. A resin is applied to form an elastic film.
なお、上記樹脂としては密着力の強い弾性皮膜を形成す
るものであれば特に限定はないが、発泡を押えた軟質ウ
レタン等が適当である。The above-mentioned resin is not particularly limited as long as it forms an elastic film having a strong adhesive force, but soft urethane or the like which suppresses foaming is suitable.
第１図は本考案によるＦＷ管接続構造の一実施例を示す
要部断面図である。FIG. 1 is a cross-sectional view of an essential part showing an embodiment of the FW pipe connection structure according to the present invention.
第１図において１，１は端部を突合せた内径Ｄが５００
mm，肉厚９mmのＦＷ管であり、該ＦＷ管はポリエステル
樹脂をマトリックス樹脂としガラス繊維を補強材として
フィラメントワインディング法（ＦＷ法）で作られたも
のである。２は、ポリエステル不織布と上記マトリック
ス樹脂からなる素材をＦＷ管１，１の突合せ部分の外周
にハンドレイアップにより設けてなる幅寸法Ｌ１が５０
０mm，厚さ0.５〜0.７mmのＦＲＰ材の外張り、すなわち
バットジョイントである。なお第３図に示したＦＷ管の
接続構造も上記と同一である。In FIG. 1, 1, 1 have an inner diameter D of 500 with their ends butted together.
mm and wall thickness of 9 mm, and the FW tube was made by the filament winding method (FW method) using polyester resin as a matrix resin and glass fiber as a reinforcing material. 2 has a width L 1 of 50, which is formed by hand laying up a material composed of a polyester nonwoven fabric and the above matrix resin on the outer periphery of the abutting portion of the FW pipes 1, 1.
It is a butt joint, that is, a butt joint of FRP material having a thickness of 0 mm and a thickness of 0.5 to 0.7 mm. The connection structure of the FW pipe shown in FIG. 3 is also the same as above.
３はＦＷ管１，１の突合せ部分の内周に設けた厚さ６０
０〜７００μの弾性皮膜であり、ハイボン１５３０Ｇ
（ネオプレンゴム系接着剤，日立化成ポリマー株式会社
製商品名）をＬ２が約５００mm巾で二回ハケ塗りを行い
形成した。3 is a thickness 60 provided on the inner circumference of the abutting portion of the FW pipes 1 and 1.
It is an elastic film of 0-700μ, and Hibon 1530G
(Neoprene rubber adhesive, trade name of Hitachi Chemical Polymer Co., Ltd.) was applied by brushing twice with L 2 of about 500 mm width.
次に、本考案によるＦＷ接続管（実施例）と従来の第３
図に示すＦＷ接続管（比較例）について第２図に示す方
法により耐圧性（破壊内圧）の比較試験を行った。Next, the FW connecting pipe according to the present invention (embodiment) and the conventional third
With respect to the FW connecting pipe (comparative example) shown in the drawing, a comparative test of pressure resistance (breaking internal pressure) was conducted by the method shown in FIG.
なお、第２図において６は高圧ポンプ，７は盲蓋，８は
エアーを抜きチューブ，９は水圧計，１０はドレイン側
バルブである。In FIG. 2, 6 is a high-pressure pump, 7 is a blind lid, 8 is a tube for venting air, 9 is a water pressure gauge, and 10 is a drain side valve.
上記試験結果を第１表に示す。The test results are shown in Table 1.
第１表の結果から明らかなように本考案によるＦＷ接続
管は耐圧性に優れることがわかる。 As is clear from the results shown in Table 1, the FW connecting pipe according to the present invention has excellent pressure resistance.
本考案は、上述の通り、ＦＲＰ製管状体の接続に際し、
接続部の外側（外面）は従来と同様にＦＲＰ材を積層
し、これに加え、接続部の内側（内面）は、ＦＲＰ材の
ハンドレイアップによる内張りに変え、ゴム系接着剤等
の塗布により弾性皮膜を形成するようにしており、特
に、作業者の管内部に入り込んでの内張り作業が困難な
例えば、１０００以下の中，小口径の管状体における
接続部の耐圧性の大巾な向上が可能となる効果がある。As described above, the present invention, when connecting the FRP tubular body,
The outer side (outer surface) of the connection part is laminated with the FRP material in the same manner as the conventional one. In addition to this, the inner side (inner surface) of the connection part is changed to an inner lining by hand layup of the FRP material, and by applying a rubber adhesive or the like. An elastic film is formed, and in particular, it is possible to greatly improve the pressure resistance of the connection portion in a medium- or small-diameter tubular body having a diameter of 1000 or less, which makes it difficult for the operator to put the lining inside. There is a possible effect.
第１図は本考案のＦＷ管接続構造の一実施例を示す要部
断面図、第２図は本考案による接続構造としたＦＷ接続
管の破壊内圧の測定方法の説明断面図である。 第３図は従来の外張りによるＦＷ管接続構造を示す要部
断面図、第４図，第５図は第３図にハンドレイアップに
より幅寸法の異なるＦＲＰ材による内張りを設けた場合
のＦＷ管接続構造を示す要部説明断面図である。 符号の説明 １……ＦＷ管、２……ＦＲＰ材 ３……弾性皮膜、４，５……ＦＲＰ材 ６……高圧ポンプ、７……盲蓋 ８……エアー抜きチューブ、９……水圧計 １０……ドレイン側バルブFIG. 1 is a cross-sectional view of an essential part showing an embodiment of the FW pipe connection structure of the present invention, and FIG. 2 is an explanatory cross-sectional view of a method for measuring the breaking internal pressure of the FW connection pipe having the connection structure of the present invention. FIG. 3 is a cross-sectional view of a main part showing a conventional FW pipe connection structure with an outer lining, and FIGS. 4 and 5 are FWs when an inner lining with FRP materials having different width dimensions is provided by hand layup in FIG. It is an important section explanatory sectional view showing a pipe connection structure. Explanation of symbols 1 ... FW tube, 2 ... FRP material 3 ... Elastic film, 4, 5 ... FRP material 6 ... High-pressure pump, 7 ... Blind lid 8 ... Air bleed tube, 9 ... Water pressure gauge 10 ... Drain valve
Claims (1)
続部の外側にＦＲＰ材を積層するとともに、前記接続部
の内側に、ゴム系接着剤又は合成樹脂を塗布し弾性皮膜
を形成することを特徴とするＦＲＰ製管状体の接続構
造。1. An FRP material is laminated on the outside of a connecting portion such as between FW pipes or an FW pipe and an FRP joint, and a rubber adhesive or a synthetic resin is applied to the inside of the connecting portion to form an elastic film. A connection structure of a tubular body made of FRP, which is characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989054223U JPH068390Y2 (en) | 1989-05-11 | 1989-05-11 | FRP tubular body connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989054223U JPH068390Y2 (en) | 1989-05-11 | 1989-05-11 | FRP tubular body connection structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02145386U JPH02145386U (en) | 1990-12-10 |
| JPH068390Y2 true JPH068390Y2 (en) | 1994-03-02 |
Family
ID=31576096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989054223U Expired - Lifetime JPH068390Y2 (en) | 1989-05-11 | 1989-05-11 | FRP tubular body connection structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH068390Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7449056B2 (en) * | 2019-09-11 | 2024-03-13 | 株式会社栗本鐵工所 | curved pipe |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS622394U (en) * | 1985-06-15 | 1987-01-08 | ||
| JPH0540717Y2 (en) * | 1985-06-18 | 1993-10-15 |
-
1989
- 1989-05-11 JP JP1989054223U patent/JPH068390Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02145386U (en) | 1990-12-10 |
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