JPH0230271Y2 - - Google Patents

Description

【考案の詳細な説明】 産業上の利用分野 本考案は樹脂管の引抜兼水圧試験装置に関す
る。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a drawing and hydraulic testing device for resin pipes.

従来の技術 樹脂管の製造技術の一種として、樹脂含浸繊維
帯を芯金の周囲に巻付けることにより管体を成形
する、いわゆるフイラメントワインデイング法が
ある。このようにして成形、硬化された樹脂管
は、その後、芯金から引抜脱型を行う必要があ
る。また、成形後の管には、管内に通す流体の漏
れの原因となるピンホール、クラツク等を発見す
るため、内部に加圧水を充満させてその漏れを検
出する水圧試験が実施される。BACKGROUND ART One type of technology for manufacturing resin pipes is the so-called filament winding method, in which a pipe body is formed by winding a resin-impregnated fiber band around a metal core. The resin tube molded and cured in this manner must then be pulled out from the core metal and removed from the mold. In addition, in order to discover pinholes, cracks, etc. that may cause leakage of the fluid passing through the tube, the formed tube is subjected to a water pressure test in which the inside is filled with pressurized water to detect any leakage.

このため従来は、樹脂管を成形、硬化させた後
に適当な手段によりこれを芯金から引抜き、引抜
いた管を定寸に切断した後に、これを水圧試験装
置に搬入して水圧試験を実施している。 For this reason, conventionally, after a resin pipe is molded and cured, it is pulled out from the core metal using an appropriate means, and the pulled out pipe is cut to a fixed size, and then the pipe is carried into a water pressure testing device to conduct a water pressure test. ing.

考案が解決しようとする問題点 ところが、このような従来のものでは、管の成
形、引抜とその水圧試験とを別の装置で実施して
いるため、両装置間における管の搬送や水圧試験
装置への管のセツテングに時間を要するという問
題点がある。しかも水圧試験装置は管の両端を面
板等で閉塞しなければならないため、装置構造が
大形化、複雑化するという問題点もある。Problems that the invention aims to solve However, with these conventional methods, the forming and drawing of the tube and the water pressure test are carried out in separate devices, so the pipe is transported between the two devices and the water pressure test device is not connected. There is a problem in that it takes time to set up the tube. Moreover, since both ends of the pipe must be closed off with a face plate or the like in the hydraulic testing apparatus, there is also the problem that the apparatus structure becomes larger and more complicated.

そこで本考案はこのような問題点を解決し、引
抜および水圧試験の工程の複合化を図ることによ
り、工程時間の短縮化および管生産設備の簡略化
に寄与することを目的とする。 Therefore, the present invention aims to solve these problems and contribute to shortening process time and simplifying pipe production equipment by combining the drawing and hydraulic testing processes.

問題点を解決するための手段 上記問題点を解決するため本考案は、芯金の両
端外周にこの芯金の外面と樹脂管の内面との間を
シールする一対のシール材を配置し、両シール材
間における芯金部分に、芯金と樹脂管との間への
加圧水供給口を形成したものである。Means for Solving the Problems In order to solve the above problems, the present invention arranges a pair of sealing materials on the outer periphery of both ends of the core metal to seal between the outer surface of the core metal and the inner surface of the resin tube. A pressurized water supply port between the core metal and the resin pipe is formed in the core metal portion between the sealing materials.

作 用 このようなものであると、芯金の周囲に樹脂含
浸繊維帯を巻付けて樹脂管を成形、硬化させた後
に、加圧水供給口から芯金と樹脂管との間に加圧
水を注入すると、この加圧水により芯金および樹
脂管に歪が生じて両者間に隙間が形成される。加
圧水はこの隙間に入り込んで樹脂管の内面全体に
作用し、この結果水圧試験が実施される。このと
き樹脂管の両端はシール材にてシールされるた
め、この両端から加圧水の漏れが防止される。ま
た、水圧試験後は樹脂管を芯金から引抜くことに
なるが、前述のように水圧試験時に樹脂管と芯金
との間に隙間が形成されているため、引抜抵抗は
大幅に低減されることになる。Effect If this is the case, after wrapping a resin-impregnated fiber band around the core metal to form and harden the resin pipe, pressurized water is injected between the core metal and the resin pipe from the pressurized water supply port. This pressurized water causes distortion in the core metal and the resin pipe, and a gap is formed between them. Pressurized water enters this gap and acts on the entire inner surface of the resin tube, resulting in a water pressure test. At this time, since both ends of the resin pipe are sealed with a sealing material, leakage of pressurized water from both ends is prevented. In addition, after the water pressure test, the resin pipe must be pulled out from the core metal, but as mentioned above, a gap is formed between the resin pipe and the core metal during the water pressure test, so the pulling resistance is significantly reduced. That will happen.

実施例 第１図〜第２図は本考案の一実施例を示すもの
である。ここで１は芯金であり、この芯金１の周
囲に樹脂含浸繊維帯を巻付けることにより樹脂管
２が成形、硬化されるようになつている。３はそ
の受口、４は挿口である。Embodiment FIGS. 1 and 2 show an embodiment of the present invention. Here, 1 is a core metal, and by wrapping a resin-impregnated fiber band around the core metal 1, a resin pipe 2 is molded and hardened. 3 is its socket, and 4 is its socket.

芯金１の両端外周には環状溝５が形成され、こ
の環状溝５にはゴム製のシール材６がそれぞれは
め込まれている。７は環状溝５に連通されたシー
ル用高圧水供給口で、芯金１外からのシール用高
圧水供給管８が接続され、環状溝５内におけるシ
ール材６の背面にシール用高圧水９を作用させ
て、このシール材６を樹脂管２の内面に押圧させ
るように構成されている。 An annular groove 5 is formed on the outer periphery of both ends of the core metal 1, and a rubber sealing material 6 is fitted into each of the annular grooves 5. 7 is a sealing high pressure water supply port communicating with the annular groove 5, to which a sealing high pressure water supply pipe 8 from outside the core metal 1 is connected, and a sealing high pressure water 9 is connected to the back side of the sealing material 6 in the annular groove 5. The sealing material 6 is pressed against the inner surface of the resin tube 2 by applying the pressure.

両シール材６間における芯金１部分には、この
芯金１の軸心方向および周方向に複数の加圧水供
給口１０が形成されている。この加圧水供給口１
０は芯金１を半径方向に貫通し、芯金１の内部に
おいて水圧試験用高圧水供給管１１が接続されて
いる。この高圧水供給管１１は、芯金１の外部か
ら各加圧水供給口１０に向けて水圧試験用高圧水
１２を供給可能なように、分岐状に形成されてい
る。 A plurality of pressurized water supply ports 10 are formed in a portion of the core metal 1 between both seal members 6 in the axial direction and circumferential direction of the core metal 1. This pressurized water supply port 1
0 penetrates the core metal 1 in the radial direction, and a high-pressure water supply pipe 11 for hydraulic pressure testing is connected inside the core metal 1. This high-pressure water supply pipe 11 is formed in a branched shape so that high-pressure water 12 for hydraulic pressure testing can be supplied from the outside of the core metal 1 toward each pressurized water supply port 10 .

なお、第１図において、１３は樹脂管２の受口
３端面に当てられる固定ダイス、１４は芯金１の
挿口側端部１５を押圧する油圧ラムである。 In FIG. 1, 13 is a fixed die that is applied to the end surface of the socket 3 of the resin tube 2, and 14 is a hydraulic ram that presses the socket end 15 of the core metal 1.

このような構成において、芯金１の周囲に樹脂
含浸繊維帯を巻付けて樹脂管２を成形させたな
ら、次に水圧試験を実施する。すなわち、まずシ
ール用高圧水供給管８からシール用高圧水供給口
７を経てシール材６の背面にシール用高圧水９を
供給し、シール材６を樹脂管２の両端内面に押圧
させて、この樹脂管２と芯金１との間をシールす
る。このシール用高圧水９の水圧は、樹脂管２の
保証水圧（管種によつて異なるが通常１〜25Kg
ｆ／cm²程度）よりも５Kgｆ／cm²程度高くするのが
適当である。 In such a configuration, after the resin-impregnated fiber band is wrapped around the core bar 1 to form the resin pipe 2, a water pressure test is next performed. That is, first, high-pressure sealing water 9 is supplied from the sealing high-pressure water supply pipe 8 to the back side of the sealing material 6 through the sealing high-pressure water supplying port 7, and the sealing material 6 is pressed against the inner surface of both ends of the resin pipe 2. The resin pipe 2 and the core metal 1 are sealed. The water pressure of this high-pressure water 9 for sealing is the guaranteed water pressure of the resin pipe 2 (usually 1 to 25 kg depending on the pipe type).
It is appropriate to set it higher by about 5 Kgf/cm ² than the standard (about 5 kgf/cm ² ).

シールが施されたなら、次に水圧試験用高圧水
供給管１１から加圧水供給口１０に向けて水圧試
験用高圧水１２を供給する。すると、この加圧水
１２は樹脂管２の内面１６と芯金１の外面１７と
の間に作用し、樹脂管２および芯金１に歪を発生
させて両者間に隙間１８を形成させる。この隙間
１８は、たとえば口径2000mmの樹脂管２で0.5mm
以上となるのが好適である。 After the seal is applied, high-pressure water 12 for a hydraulic test is then supplied from the high-pressure water supply pipe 11 to the pressurized water supply port 10 . Then, this pressurized water 12 acts between the inner surface 16 of the resin tube 2 and the outer surface 17 of the core metal 1, causing distortion in the resin tube 2 and the core metal 1, and forming a gap 18 therebetween. This gap 18 is, for example, 0.5 mm for a resin pipe 2 with a diameter of 2000 mm.
The above is preferable.

隙間１８が形成されると、高圧水１２はこの隙
間１８内に入り込み、両シール材６間における周
方向および長さ方向にわたつて、樹脂管２と芯金
１との間に高圧水１２の膜が形成されることにな
る。このため、樹脂管２はその内面全体にわたつ
て高圧水１２が作用することになり、水圧試験が
行なわれる。 When the gap 18 is formed, the high-pressure water 12 enters the gap 18, and the high-pressure water 12 flows between the resin pipe 2 and the core metal 1 in the circumferential direction and the length direction between both the sealing materials 6. A film will form. Therefore, the high pressure water 12 acts on the entire inner surface of the resin pipe 2, and a water pressure test is performed.

水圧試験が終了したなら、両高圧水９，１２を
抜き、樹脂管２を芯金１から引抜く。このとき、
水圧試験時における隙間１８の形成により、樹脂
管２と芯金１とが互いに縁切りされているため引
抜抵抗は大幅に低減されることになる。この結
果、樹脂管２の受口３端面にダイス１３を当てが
い、芯金１の挿口端端部１５を油圧ラム１４で押
圧すれば、容易に脱型、引抜を行なうことができ
る。 When the water pressure test is completed, both high pressure waters 9 and 12 are drained, and the resin pipe 2 is pulled out from the core bar 1. At this time,
Due to the formation of the gap 18 during the water pressure test, the resin pipe 2 and the core metal 1 are cut off from each other, so that the pull-out resistance is significantly reduced. As a result, by applying the die 13 to the end face of the socket 3 of the resin tube 2 and pressing the socket end 15 of the core bar 1 with the hydraulic ram 14, demolding and drawing can be easily performed.

考案の効果 以上述べたように本考案によると、樹脂管の成
形、引抜と水圧試験とを同一の装置のもとで複合
的に行なうことができるために、工程時間の短縮
化を図ることが可能となる。また、樹脂管と芯金
との間をシールした状態で水圧試験を行なうもの
であるため、従来のように管の両端を面板で閉塞
してシールするものに比べ装置を簡単かつ小形化
できる利点がある。しかも試験用の高圧水は樹脂
管と芯金との隙間内に注入するだけでよいため微
量で足り、従来のように両端を揚板で閉塞した管
内全体に高圧水を供給するものに比べ、試験用の
水量を大幅に低減できるうえに給水設備の小形化
を図ることができる。さらに、水圧試験時に樹脂
管と芯金との間に隙間が形成されることになるた
め、引抜時の抵抗を大幅に低減することが可能と
なる。Effects of the invention As described above, according to the invention, the molding and drawing of resin pipes and the water pressure test can be performed in a combined manner using the same equipment, so that the process time can be shortened. It becomes possible. Additionally, since the water pressure test is performed with the resin tube and cored metal sealed, the device has the advantage of being simpler and more compact than the conventional method, which seals both ends of the tube with face plates. There is. In addition, only a small amount of high-pressure water is needed for testing because it only needs to be injected into the gap between the resin pipe and the core metal, compared to conventional methods that supply high-pressure water to the entire inside of the pipe with both ends closed with lifting plates. Not only can the amount of water used for testing be significantly reduced, but the water supply equipment can also be made smaller. Furthermore, since a gap is formed between the resin tube and the core metal during the water pressure test, it is possible to significantly reduce the resistance during drawing.

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

第１図は本考案の一実施例の全体図、第２図は
その要部の詳細断面図である。 １……芯金、２……樹脂管、６……シール材、
９……シール用高圧水、１０……加圧水供給口、
１２……水圧試験用高圧水。 FIG. 1 is an overall view of an embodiment of the present invention, and FIG. 2 is a detailed cross-sectional view of the main parts thereof. 1...Core metal, 2...Resin pipe, 6...Sealing material,
9... High pressure water for sealing, 10... Pressurized water supply port,
12...High pressure water for water pressure testing.

Claims (1)

【実用新案登録請求の範囲】 芯金の周囲に樹脂含浸繊維帯を巻付けて形成さ
れた樹脂管の引抜兼水圧試験装置であつて、 芯金の両端外周にこの芯金の外面と樹脂管の内
面との間をシールする一対のシール材を配置し、 両シール材間における芯金部分に、芯金と樹脂
管との間への加圧水供給口を形成し、 たことを特徴とする樹脂管の引抜兼水圧試験装
置。[Scope of Claim for Utility Model Registration] A drawing and hydraulic testing device for a resin pipe formed by wrapping a resin-impregnated fiber band around a core metal, wherein the outer surface of the core metal and the resin pipe are attached to the outer periphery of both ends of the core metal. A pair of sealing materials are arranged to seal between the inner surface of the resin tube, and a pressurized water supply port between the core metal and the resin pipe is formed in the core metal portion between the two sealants. Pipe drawing and water pressure testing equipment.