JPH05272666A - Double pipe and joint part thereof - Google Patents
Double pipe and joint part thereofInfo
- Publication number
- JPH05272666A JPH05272666A JP4067502A JP6750292A JPH05272666A JP H05272666 A JPH05272666 A JP H05272666A JP 4067502 A JP4067502 A JP 4067502A JP 6750292 A JP6750292 A JP 6750292A JP H05272666 A JPH05272666 A JP H05272666A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- tube
- hard
- flange
- fluid
- 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.)
- Withdrawn
Links
Landscapes
- Joints With Pressure Members (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】この発明は、流体の成分および含
有物の管内壁面への付着による管孔の縮径化を防止し得
る配管構造とその継手部に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping structure capable of preventing a diameter reduction of a pipe hole due to adhesion of fluid components and inclusions to an inner wall surface of the pipe and a joint portion thereof.
【0002】[0002]
【従来の技術】配管は、管内に流体を送流しているうち
に、流体の成分および含有物が管の内壁面に徐々に付着
していくため、管の流路内径も徐々に縮径化し、遂に閉
塞するに至る。しかも流路内径が縮径化するに連れて流
量が小さくなり、その管路に関連した設備の稼働効率は
低下し、縮径化は遂に閉塞を招きその設備の機能を停止
させてしまう。2. Description of the Related Art In piping, while the fluid is being sent into the pipe, the components and contents of the fluid gradually adhere to the inner wall surface of the pipe. Finally, it is closed. Moreover, as the inner diameter of the flow path is reduced, the flow rate is reduced, the operating efficiency of the equipment associated with the pipeline is reduced, and the diameter reduction finally causes blockage and stops the function of the equipment.
【0003】このため、管の流路内径がある程度までに
縮径化したときには、通常、その管内壁面の付着物は、
化学薬品で洗浄する方法、管内壁面への高圧水の吹付け
によって洗浄する方法、その管内を弾性体で構成された
塊を高圧空気を用いて強制挿通することによって掻き落
す方法等によって、除去される。For this reason, when the inner diameter of the flow path of the pipe is reduced to a certain extent, the deposits on the inner wall surface of the pipe are usually
It is removed by a method of cleaning with chemicals, a method of cleaning by spraying high pressure water on the inner wall surface of the pipe, a method of scraping off a lump composed of an elastic body inside the pipe by forcibly inserting it with high pressure air. It
【0004】このような方法によって管内の付着物を除
去するに際しては、通常その除去作業期間中、付着物を
除去する管路の全範囲にわたって、流体の送流を停止
し、更にその管路内に残存している流体を排除しなけれ
ばならない。管路内の流体の流れを停止すれば、通常そ
の管路に関連した設備を休止させることとなり、その設
備休止に起因する経済的損失が大きいという問題があっ
た。When removing deposits in a pipe by such a method, normally, during the removal work, the flow of the fluid is stopped over the entire range of the pipeline for removing deposits, and the inside of the pipeline is further stopped. The fluid remaining in the chamber must be eliminated. If the flow of the fluid in the pipeline is stopped, the equipment related to the pipeline is normally suspended, and there is a problem that the economic loss due to the suspension of the equipment is large.
【0005】また、管路内に残存する流体の量はその管
路長さが長い程多く、その流体の排除作業はその流体が
化学薬品、危険物混入流体等にあっては危険なもので、
その排除した流体の処分も大変面倒なものであるという
問題があった。殊に、化学工場においては、化学物質の
中和、反応、抽出等に硫酸や石灰が使用されることが多
く、硫酸や石灰が用いられている化学工場の配管の流体
中には硫酸と石灰とが混在して含まれている場合が多
い。Further, the amount of fluid remaining in the pipeline increases as the pipeline length increases, and the work of removing the fluid is dangerous if the fluid is a chemical, a fluid containing dangerous substances, or the like. ,
Disposal of the removed fluid was very troublesome. Particularly, in chemical plants, sulfuric acid and lime are often used for neutralization, reaction, extraction, etc. of chemical substances, and sulfuric acid and lime are contained in the fluid in the pipes of chemical plants where sulfuric acid and lime are used. Often mixed and included.
【0006】この様な場合、流体中の硫酸と石灰とが反
応して石膏(CaSO4 )が生じ、その石膏が管路の内
壁面に付着し、その付着物が積層してその管路は遂に閉
塞するに至る。このため、石膏を含有する流体または石
膏が送流中に生成する流体の配管は定期的に管内壁面に
付着した石膏の除去作業が行われており、その頻度は多
い。In such a case, sulfuric acid and lime in the fluid react with each other to produce gypsum (CaSO 4 ), the gypsum adheres to the inner wall surface of the pipe line, and the adhered substance is laminated to form the pipe line. Finally it is closed. For this reason, in the piping of the fluid containing gypsum or the fluid generated while the gypsum is being sent, the work of removing the gypsum adhering to the inner wall surface of the pipe is regularly performed, and the frequency thereof is high.
【0007】管路内壁に付着した石膏は、石膏が化学的
に安定した物質であり、また強固なものであるため、化
学洗浄、高圧水の吹付けによる洗浄または管内に弾性体
で構成された弾を強制挿通する洗浄等では除去できない
ので、該管路の管は、全域にわたって、そのフランジ継
手部で結合が外され、地上に降され、その後、管の外側
表面をハンマー等で強打する等、変形を伴う衝撃や振動
を管に与える等の機械的手段によって、清掃されてい
る。架設されている配管を地上に降ろす作業は大掛で面
倒な作業であり、降ろした管をハンマー等で強打する作
業は重筋作業である。更に、石膏の除去された管は、そ
のフランジの向きが強打による管の変形によって変わっ
ているため、該管を元のように架設する作業が極めて頻
雑であるという問題があった。[0007] The gypsum adhering to the inner wall of the pipe is a chemically stable substance and is strong, so that the gypsum was chemically washed, washed by spraying high-pressure water, or made of an elastic body in the pipe. Since the bullet cannot be removed by washing by forcefully inserting it, the pipe of the pipe line is disconnected at its flange joint portion over the entire area, and is dropped to the ground, and then the outer surface of the pipe is struck with a hammer etc. It is cleaned by mechanical means such as applying shock or vibration with deformation to the pipe. The work of lowering the erected pipe to the ground is a large and troublesome work, and the work of hitting the lowered pipe with a hammer is a heavy-duty work. Further, since the direction of the flange of the pipe from which the gypsum has been removed is changed by the deformation of the pipe due to smashing, there is a problem that the work of installing the pipe as it is is extremely complicated.
【0008】一方、浄水を送流する配管においては、付
着物その物が管内壁に付着しにくいようにする方法とし
て、管内壁面に亜鉛メッキ、銅メッキ若しくは樹脂ライ
ニング等を施した管を布設する方法、管路に銅管若しく
は樹脂管を布設する方法、更には管路内の浄水をイオン
化処理する方法等が採用されている。On the other hand, in the pipe for sending purified water, as a method for preventing the adhered substance itself from adhering to the inner wall of the pipe, a pipe having zinc plated, copper plated or resin lining is laid on the inner wall of the pipe. A method, a method of laying a copper pipe or a resin pipe in the pipeline, and a method of ionizing the purified water in the pipeline are adopted.
【0009】管内壁面に亜鉛メッキや銅メッキを施した
管を布設する方法には、そのメッキが流体の侵食作用に
よって数年内に剥離するため、メッキによる付着物の付
着防止効果の持続に限りがある。管路に銅管を布設する
方法は、浄水については付着物の積層を防止する効果が
あるが、銅管自体が高価なものであり、銅と化学反応を
きたす成分を含有する流体には適用できず、その用途が
限られているという問題があった。更に、管路内の浄水
をイオン処理する方法もまた付着物の積層を防止する効
果があるが、その用途が浄水に限られ、汎用性に欠ける
という問題があった。In the method of laying a pipe plated with zinc plating or copper plating on the inner wall surface of the pipe, the plating is peeled off within a few years due to the erosion effect of the fluid, so that the effect of preventing adhesion of deposits by plating is limited. is there. The method of laying a copper pipe in the pipeline has the effect of preventing the buildup of deposits on purified water, but the copper pipe itself is expensive and is applicable to fluids containing components that cause a chemical reaction with copper. There was a problem that it could not be done and its application was limited. Furthermore, the method of ion-treating the purified water in the pipeline is also effective in preventing the buildup of deposits, but its use is limited to purified water, and there is a problem that it lacks versatility.
【0010】化学的に安定した物質である水で構成さ
れ、不純物の含有量が極めて少ない浄水の送流配管にお
いてさえ、前述の問題があるため、工場廃液、下水等の
送流配管においては、更成る入念な維持管理が必要であ
ることは言うまでもないことである。以上のことから、
付着物の付着しない構造の管路の出現が熱望されてい
た。[0010] Even in the flow pipe for purified water, which is composed of water, which is a chemically stable substance, and has a very small amount of impurities, the above-mentioned problem occurs. Therefore, in the flow pipe for factory waste liquid, sewage, etc., It goes without saying that further careful maintenance is necessary. From the above,
The advent of a pipeline having a structure free of deposits was eagerly awaited.
【0011】[0011]
【この発明が解決しようとする課題】本発明は、上述の
事情に鑑み、管路内を流れる流体の成分や含有物が管路
の内壁に付着しても、その管路の内径はある程度以下に
は縮径化することがない管およびその継手部を提供しよ
うとするものである。SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, the present invention has an inner diameter of the pipeline to a certain extent or less even if a component or inclusion of a fluid flowing in the pipeline adheres to the inner wall of the pipeline. It is an object of the present invention to provide a pipe and its joint that do not reduce the diameter.
【0012】[0012]
【課題を解決するための手段】本発明は、(1)硬管の
管孔に、該管孔の内周長より短い外周長を有する可撓管
を挿通し、該可撓管の管孔に流体を通すことを特徴とす
る流体輸送用二重配管、(2)端部に鍔と該鍔付近から
中央部側に内周面が縮小するテーパ状内面とを有してな
る2組の硬管を各々の該鍔を対向して縦列し、各々の該
硬管の管孔に該管孔の内周長より短い外周長を有する可
撓管を該鍔の端面から該硬管の孔の外側に若干突出した
状態に挿通し、中央部に該鍔の端面の内径より大きい外
径を両端部に該硬管の内径より小さい外径を有すると共
に該中央部から該両端部側に向かって外径が縮小するテ
ーパ状外面を有する短筒を、各々の該硬管の管孔に在る
可撓管の口元に挿入し、硬管のテーパ面に可撓管の口元
を介して該短筒のテーパ面を嵌合し、各々の該鍔に設け
た対向してなる複数個の穴のそれぞれに頭付きボルトを
連通し、該ボルトにナットをねじ込んで、該ボルトの頭
とナットとの間に各々の該鍔を挟んで連結したことを特
徴とする隣合う流体輸送用二重配管を結合する継手、お
よび(3)端部に、外周沿いに適宜位置に複数個の孔を
有する鍔と該鍔付近から中央部側に内周面が縮小するテ
ーパ状内面を有してなる硬管に、該硬管の管孔に該管孔
の内周長より短い外周長を有する可撓管を該鍔の端面か
ら該硬管の孔の外側に若干突出した状態に挿通し、片側
端に鍔を、該鍔付近に該硬管の該鍔の端面の内径より大
きい外径を、他側端に該硬管の内径より小さい外径を有
し鍔付近から他側端に向かって外径が縮小するテーパ状
外面を有する鍔付き短筒を、該硬管の管孔に在る可撓管
の口元に挿入し、硬管のテーパ面に可撓管の口元を介し
て該短筒のテーパ面を嵌合したことを特徴とする流体輸
送用二重配管の継手、を要旨とするAccording to the present invention, (1) a flexible tube having an outer peripheral length shorter than an inner peripheral length of the tubular hole is inserted into the tubular hole of the rigid tube, and the tubular hole of the flexible tube is provided. A double pipe for transporting fluid, characterized in that a fluid is passed through, and (2) two sets of a pipe having a flange at the end and a tapered inner surface having a reduced inner peripheral surface from the vicinity of the flange to the central portion side. A hard tube is tandemly arranged so that each of the flanges faces each other, and a flexible tube having an outer peripheral length shorter than an inner peripheral length of the tube hole is provided in a tube hole of each of the hard tubes from the end surface of the flange to the hole of the hard tube. The outer diameter of the flange is slightly larger than the inner diameter of the end face of the collar, and both ends have an outer diameter smaller than the inner diameter of the hard pipe. A short tube having a tapered outer surface whose outer diameter is reduced by inserting it into the mouth of the flexible tube in the tube hole of each of the hard tubes, and inserting it into the tapered surface of the hard tube through the mouth of the flexible tube. Short Between the head of the bolt and the nut by screwing a nut with a head into each of the plurality of opposing holes provided in each of the collars, by fitting the upper surface to each other. A joint for connecting adjacent double pipes for fluid transport, characterized in that the collars are connected to each other by sandwiching each of the collars, and (3) a collar having a plurality of holes at appropriate positions along the outer periphery at the end. A hard tube having a tapered inner surface whose inner peripheral surface shrinks from the vicinity of the flange toward the central portion, and a flexible tube having an outer peripheral length shorter than the inner peripheral length of the tube hole in a tube hole of the hard tube. It is inserted in a state where it slightly protrudes from the end face of the flange to the outside of the hole of the hard pipe, and a flange is provided on one end, and an outer diameter larger than the inner diameter of the end face of the hard pipe is provided near the flange and the other end is provided. And a short tube with a flange having an outer diameter smaller than the inner diameter of the hard tube and having a tapered outer surface whose outer diameter decreases from the vicinity of the flange toward the other end. A double pipe for fluid transport, characterized in that the double pipe for fluid transportation is inserted into the mouth of the flexible pipe in the pipe hole, and the taper surface of the short pipe is fitted to the taper surface of the hard pipe through the mouth of the flexible pipe. Fittings are the gist
【0013】[0013]
【作用】流体の流通する管の内壁面には、管内を流れる
流体には必ず多少の脈動があるため、流体の脈動による
圧力の変化に応じて管内壁を半径方向に押し広げる力が
作用する。従って、本発明の二重管を構成する可撓管
は、その管壁の剛性が小さいため、前記の広げる力によ
って、半径方向に伸縮を行うこととなり、その可撓管の
伸縮は脈動の度毎に生じる。このため、管内壁に付着し
た付着物は、ある程度の厚さに達したとき、可撓管内壁
の伸縮作用の繰り返し運動によって剥がれ、剥がれた付
着物はその可撓管内を流れている流体によって押し流さ
れる。[Function] Since the fluid flowing in the pipe always has some pulsation on the inner wall surface of the pipe through which the fluid flows, a force to spread the inner wall of the pipe in the radial direction acts in accordance with the change in pressure due to the pulsation of the fluid. .. Therefore, in the flexible tube that constitutes the double tube of the present invention, since the rigidity of the tube wall is small, the expanding and contracting force causes the flexible tube to expand and contract in the radial direction. It occurs every time. For this reason, when the attached material on the inner wall of the pipe reaches a certain thickness, it is peeled off due to the repeated motion of the expansion and contraction action of the inner wall of the flexible tube, and the detached attached matter is pushed away by the fluid flowing in the flexible tube. Be done.
【0014】流体の脈動による可撓管の円周方向の伸縮
量が小さい場合には、可撓管内壁への付着物の付着は剥
がれずに成長していくが、このような場合においては、
流体の送流の停止・開始を適宜に行うことによって、流
体に強制的な脈動を生じさせ、成長した付着物を管内壁
から自動的に剥すことが出来る。When the amount of expansion and contraction in the circumferential direction of the flexible tube due to the pulsation of the fluid is small, the adhered matter adheres to the inner wall of the flexible tube without peeling off, but in such a case,
By appropriately stopping and starting the flow of the fluid, forced pulsation is generated in the fluid, and the grown deposit can be automatically removed from the inner wall of the pipe.
【0015】通常、管路に関連した設備は、点検整備を
行う際には運転の停止・開始がおこなわれるので、前述
の強制的脈動は点検整備がある度に生じることになる。
また、運転時の脈動だけでは付着物の剥離が不十分であ
る場合には点検整備の際に適宜数の運転の停止・開始を
繰り返し行うことにより、前述の成長した付着物は剥さ
れ流体によって押し流されることになる。[0015] Normally, the equipment related to the pipeline is stopped and started during the maintenance, so that the above-mentioned forced pulsation occurs every time the maintenance is performed.
If the pulsation during operation is insufficient to remove the adhered matter, stop and start the appropriate number of operations repeatedly during inspection and maintenance to remove the grown adhered matter by the fluid. It will be washed away.
【0016】[0016]
【実施例】本発明の二重配管1は図1および図2に示す
如く、外側が硬管3により内側が可撓管4によって構成
されたものであり、該硬管3の管孔に、該管孔の内周長
より短い外周長を有する可撓管4を挿通することにより
構成される。可撓管4は、その管内を流動する流体の圧
力によって半径方向に膨脹変形するもの、又は管断面形
状を円状に保ち得る剛性を有しないものであり、ゴム、
樹脂若しくは布等の剛性の小さい素材で構成されてい
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A double pipe 1 of the present invention, as shown in FIGS. 1 and 2, has a hard tube 3 on the outer side and a flexible tube 4 on the inner side. It is configured by inserting a flexible tube 4 having an outer peripheral length shorter than the inner peripheral length of the tube hole. The flexible tube 4 is one that expands and deforms in the radial direction by the pressure of the fluid flowing in the tube, or one that does not have rigidity that can keep the tube cross-sectional shape circular, and rubber,
It is made of a material having low rigidity such as resin or cloth.
【0017】図1は、前者の流体の圧力によって半径方
向に膨脹変形する可撓管4を用いた状態を示す図であ
り、図中、実線で示す可撓管4は流体圧力が大きくなっ
て膨脹し、硬管3内壁に当接した状態を、仮想線で示す
可撓管4は流体圧力が大きくなる前の状態を示す。図2
は、後者の管断面形状を円状に保ち得る剛性を有しない
可撓管4を用いた状態を示す図であり、図中、実線で示
す可撓管4は流体圧力が大きくなって円形状となった状
態を、仮想線で示す可撓管4は流体圧力が大きくなる前
の状態を示す。FIG. 1 is a diagram showing a state in which the flexible tube 4 which expands and deforms in the radial direction by the pressure of the former fluid is used, and the fluid pressure of the flexible tube 4 shown by a solid line in the figure becomes large. The flexible tube 4 shown in phantom lines shows the state of expansion and contact with the inner wall of the hard tube 3 before the fluid pressure increases. Figure 2
FIG. 4 is a diagram showing a state in which the latter flexible tube 4 having no rigidity capable of keeping the cross-sectional shape of the tube in a circular shape is used. The flexible tube 4 indicated by the phantom line shows the state before the fluid pressure is increased.
【0018】なお、外側の硬管3は、その内部に挿通さ
れている可撓管4の外径方向の膨脹力に耐える剛性を有
するもので、金属管、樹脂管若しくはコンクリート管等
で構成されている。The outer hard tube 3 has rigidity enough to withstand the expansion force in the outer diameter direction of the flexible tube 4 inserted therein, and is made of a metal tube, a resin tube, a concrete tube, or the like. ing.
【0019】図1に示す断面形状を有する二重配管1
は、可撓管4の外面が硬管3の内面に当接するため、該
可撓管4の外径が適当な大きさであれば、該可撓管4は
過大に膨脹することが妨げられる。従って、可撓管4の
外径を適当な大きさにすることによって、該可撓管4の
寿命を長くすることが出来る。Double pipe 1 having a sectional shape shown in FIG.
Since the outer surface of the flexible tube 4 contacts the inner surface of the hard tube 3, if the outer diameter of the flexible tube 4 is an appropriate size, the flexible tube 4 is prevented from expanding excessively. .. Therefore, by setting the outer diameter of the flexible tube 4 to an appropriate size, the life of the flexible tube 4 can be extended.
【0020】図2に示す断面形状を有する二重配管1
は、硬管の内径が可撓管が膨脹したときの該可撓管の外
径より大きいために生ずる、硬管3と可撓管4との間隙
5を密閉することによって、該可撓管4が膨脹したとき
該間隙内の該空気は圧縮され、その圧縮された空気の圧
力によって過大に膨脹することが妨げられる。従って、
硬管3の内径を適当な大きさにすることによって、可撓
管の寿命を長くすることができる。Double pipe 1 having a sectional shape shown in FIG.
Is caused by the inner diameter of the hard tube being larger than the outer diameter of the flexible tube when the flexible tube is expanded. When 4 expands, the air in the gap is compressed and the pressure of the compressed air prevents it from expanding too much. Therefore,
By setting the inner diameter of the hard tube 3 to an appropriate size, the life of the flexible tube can be extended.
【0021】本発明の、二重配管1で流体を送流してい
るうちに、その二重配管1を構成する可撓管4がその材
質劣化や材質の欠陥の存在によって破損した場合、その
破損部は流体の圧力によって外側即ち硬管の内壁面に当
接した状態で、流体は引続き可撓管内を流れ続ける。ま
た、硬管を密封構造にしておくことにより、流体は硬管
の外へ洩れることなく、破損前と同様に引続き可撓管内
を流れ続けることが出来る。If the flexible pipe 4 constituting the double pipe 1 of the present invention is broken by the deterioration of the material or the presence of the defect of the material while the fluid is being sent through the double pipe 1, the damage is caused. The fluid continues to flow in the flexible tube while the portion is in contact with the outer surface, that is, the inner wall surface of the hard tube by the pressure of the fluid. Further, by making the hard tube have a sealed structure, the fluid can continue to flow in the flexible tube without leaking to the outside of the hard tube, as before the breakage.
【0022】図3および図4は、本発明に係る二重配管
相互の接続態様を示すもので、図3がフランジ継手を用
いて管相互を接続した状態を、図4がねじ継手を用いて
管相互を接続した状態をそれぞれ示しており、使用環境
・条件などを考慮して適宜いずれかを適用すればよい。FIGS. 3 and 4 show the manner of connecting the double pipes according to the present invention. FIG. 3 shows a state in which the pipes are connected by using a flange joint, and FIG. 4 shows a state in which a screw joint is used. The respective pipes are shown to be connected to each other, and any one of them may be appropriately applied in consideration of the usage environment and conditions.
【0023】図5は本発明の隣合う二重配管の継手部の
縦断面を示す図で、図中の7は対向してなる各々の硬管
3の端部に具備した鍔で、該鍔端面8から管中央側に内
周面が縮小するテーパ状内周面9を有し、10は中央よ
り両端側へ外周面が縮小するテーパ状外周面11を有す
る筒状の接続管で、該接続管中央の外径は鍔端面8の内
径よりも大きく、該接続管10の端面の外径は鍔端面8
の内径より小さい。FIG. 5 is a view showing a longitudinal section of a joint portion of adjacent double pipes of the present invention. Reference numeral 7 in the drawing denotes a collar provided at the end of each of the hard pipes 3 facing each other. A tubular connecting pipe having a tapered inner peripheral surface 9 whose inner peripheral surface contracts from the end surface 8 toward the center of the pipe, and a tapered outer peripheral surface 11 whose outer peripheral surface contracts toward both ends from the center. The outer diameter of the center of the connecting pipe is larger than the inner diameter of the collar end face 8, and the outer diameter of the end face of the connecting pipe 10 is the collar end face 8.
Smaller than the inner diameter of.
【0024】この本発明の二重配管1の継手部2は、接
続管10の両側の各々のテーパ状外面11を、隣合う硬
管3内に挿通した可撓管4の孔の端部に嵌入し、対向す
る鍔7を該鍔7に設けたボルト孔を介してボルト13と
ナット14で締結することによって、隣合う可撓管4の
各々の端部15をテーパ内周面9とテーパ外周面11と
で押圧挟持し、可撓管4の密封および該可撓管4と硬管
3との間隙5の気密性を保持したものである。In the joint portion 2 of the double pipe 1 of the present invention, the tapered outer surfaces 11 on both sides of the connecting pipe 10 are connected to the ends of the holes of the flexible pipe 4 which are inserted into the adjacent hard pipes 3. The end portions 15 of the adjacent flexible tubes 4 are tapered to the taper inner peripheral surface 9 by fitting and fastening the facing flanges 7 with bolts 13 and nuts 14 through bolt holes provided in the flanges 7. The flexible tube 4 is pressed and sandwiched by the outer peripheral surface 11 to keep the flexible tube 4 sealed and the airtightness of the gap 5 between the flexible tube 4 and the hard tube 3.
【0025】硬管を密封構造にした本発明の二重配管1
において、可撓管4が破損した場合、図5に示す如く、
鍔7間の各々の硬管3の下部に小孔6を明けておくこと
により該小穴6から染みて洩れ出る流体を見つけること
によって、可撓管4の破損した位置の二重配管1が判
る。この場合、小孔6の上側は、硬管3の底面下にしか
も可撓管4の底面に押圧されて、塞がれているため、可
撓管4が破損してもその小孔6から流体が多量に噴出す
ることは無い。Double pipe 1 of the present invention in which a hard pipe has a sealed structure 1
In the case where the flexible tube 4 is damaged, as shown in FIG.
By opening small holes 6 in the lower part of each hard tube 3 between the collars 7 and finding the fluid that leaks through the small holes 6 and leaks, the double pipe 1 at the damaged position of the flexible tube 4 can be found. .. In this case, the upper side of the small hole 6 is pressed below the bottom surface of the hard tube 3 and further by the bottom surface of the flexible tube 4 to be closed, so that even if the flexible tube 4 is damaged, A large amount of fluid does not spout.
【0026】従って、硬管3を密封構造にした本発明の
二重配管1は、可撓管4が破損しても該可撓管4の破損
部周辺の伸縮が無くなるだけで、管内の流体は通常通り
流れ、しかも破損部周辺が付着物で縮径するに至るまで
には長い時間が掛かるから、適当な時期に可撓管の交換
を行えばよい。Therefore, in the double pipe 1 of the present invention in which the hard pipe 3 has a sealed structure, even if the flexible pipe 4 is damaged, expansion and contraction around the damaged portion of the flexible pipe 4 is eliminated, and the fluid inside the pipe is Flows as usual, and it takes a long time to reduce the diameter of the area around the damaged part due to adhered matter, so the flexible tube may be replaced at an appropriate time.
【0027】図6は本発明の隣合う二重配管1継手部1
6の他の例を示す縦断面図で、図中の17は片側端から
他側端へ外周面が縮小するテーパ状外周面11を有する
筒状の接続管17で、該接続管17の該片側端の外径は
硬管3の鍔端面8の内径よりも大きく、該接続管17の
該他側端の外径は硬管3の内径より小さい。FIG. 6 is a side view of the double pipe 1 and the joint portion 1 of the present invention.
6 is a vertical cross-sectional view showing another example of 6, in which 17 is a cylindrical connecting pipe 17 having a tapered outer peripheral surface 11 whose outer peripheral surface shrinks from one end to the other end. The outer diameter of one end is larger than the inner diameter of the flange end surface 8 of the hard pipe 3, and the outer diameter of the other end of the connecting pipe 17 is smaller than the inner diameter of the hard pipe 3.
【0028】隣合う二重配管の継手部16は、接続管1
7はパッキン19を挟んで対向され、接続管17のテー
パ状外周面11を、硬管3内に挿通した可撓管4の管孔
の端部に嵌入し、対向する鍔7を該鍔7に設けたボルト
孔を介してボルト13とナット14で締結することによ
って、可撓管4の端部15をテーパ内周面9とテーパ外
周面11とで押圧挟持し、可撓管4の密封および該可撓
管4と硬管3との間隙5の気密性を保持したものであ
る。The joint portion 16 of the adjacent double pipe is the connecting pipe 1
7 are opposed to each other with the packing 19 interposed therebetween, the tapered outer peripheral surface 11 of the connecting pipe 17 is fitted into the end portion of the pipe hole of the flexible pipe 4 inserted into the hard pipe 3, and the facing flange 7 is attached to the flange 7. The end portion 15 of the flexible tube 4 is pressed and sandwiched between the tapered inner peripheral surface 9 and the tapered outer peripheral surface 11 by tightening the bolt 13 and the nut 14 through the bolt holes provided in the flexible tube 4, and the flexible tube 4 is sealed. Further, the airtightness of the gap 5 between the flexible tube 4 and the hard tube 3 is maintained.
【0029】図7は、本発明の二重管1と通常のフラン
ジ付き配管との接続部を示す縦断面図であり、継手部1
6の接続管17の外側面18を通常のフランジ21付き
硬管20のフランジ面にパッキン22を介して当接し、
対向する鍔7とフランジ21をボルト13・ナット14
で締結することによって、可撓管4の端部をテーパ内周
面9とテーパ外周面11とで押圧挟持し、可撓管4の密
封および可撓管4と硬管3との間隙5の気密性を保持し
たものである。以上の構成であるから、従来の管路にお
いて、縮径化現象の生じ易い管路部については、その部
分を本発明の二重管に変更することが容易に出来る。FIG. 7 is a vertical cross-sectional view showing a connecting portion between the double pipe 1 of the present invention and an ordinary pipe with a flange.
The outer surface 18 of the connection pipe 17 of No. 6 is brought into contact with the flange surface of the normal hard tube 20 with the flange 21 via the packing 22,
Attach the flange 7 and the flange 21 facing each other to the bolt 13 and the nut 14.
The end portion of the flexible tube 4 is pressed and sandwiched between the tapered inner peripheral surface 9 and the tapered outer peripheral surface 11, and the flexible tube 4 is sealed and the gap 5 between the flexible tube 4 and the hard tube 3 is secured. It is airtight. With the above-described configuration, in the conventional pipeline, the pipeline section in which the diameter reduction phenomenon is likely to occur can be easily changed to the double pipe of the present invention.
【0030】(第1実施例)図8は本発明の二重管1お
よびその継手部2の実施例を示すもので、二重管を構成
する硬管26a、26bはその胴中に可撓管4を囲んだ
フランジ付き半割り短管23がボルト24・ナット25
によって締結されて成る。フランジ付き半割り短管23
の長さBは、図8に示す如く、隣接する硬管26aを構
成する鍔端面8から、該端面8から突出してなる既設接
続管10の端面27までの距離Aより大きいものであ
る。(First Embodiment) FIG. 8 shows an embodiment of a double pipe 1 and a joint portion 2 thereof according to the present invention. Hard pipes 26a and 26b constituting the double pipe are flexible in their barrels. The flanged half tube 23 that surrounds the tube 4 has bolts 24 and nuts 25.
Concluded by Half split short tube with flange 23
As shown in FIG. 8, the length B is larger than the distance A from the flange end surface 8 forming the adjacent hard tube 26a to the end surface 27 of the existing connecting pipe 10 protruding from the end surface 8.
【0031】以上の構成であるから、継手部2およびフ
ランジ付き半割り短管23を締結しているそれぞれのボ
ルト13、24を取り外し、次にフランジ付き半割り短
管23を取り外した後、硬管26aを硬管26b側へ引
き寄せることによって、既設接続管10の端面27と硬
管26aを構成する鍔端面8との間に、硬管26aをそ
の半径方向に抜き出し得る幅の間隙を得ることができ
る。With the above structure, the bolts 13 and 24 fastening the joint portion 2 and the flanged half-split tube 23 are removed, and then the flanged half-split tube 23 is removed. By pulling the pipe 26a toward the hard pipe 26b side, between the end face 27 of the existing connection pipe 10 and the brim end face 8 constituting the hard pipe 26a, a gap having a width that allows the hard pipe 26a to be pulled out in the radial direction thereof is obtained. You can
【0032】従って、可撓管4を硬管26aの鍔側付
近、即ち、既設接続管10の端部27の該硬管26a側
寄り付近、および硬管26bの鍔側付近の既設接続管1
0の端部27の硬管26b側寄り(図示せず)付近の位
置で切断することによって硬管26a、26bは取り外
すことができる。Therefore, the flexible pipe 4 is provided near the brim side of the hard pipe 26a, that is, near the hard pipe 26a side of the end portion 27 of the existing connection pipe 10 and near the brim side of the hard pipe 26b.
The hard tubes 26a and 26b can be removed by cutting at a position near the hard tube 26b side (not shown) of the 0 end portion 27.
【0033】撤去した二重管部分は、取り外した硬管2
6a、26bおよびフランジ付き半割り短管23を継ぎ
合わせた長さより僅かに長い可撓管4を該硬管26a、
26bの孔に挿通した状態で、対向して具備してなる該
既設接続管10の各々のテーパ外周面を可撓管4のそれ
ぞれの端部孔に挿入し、フランジ付き半割り短管23を
該硬管26a、26b間に締結し、次いでそれぞれの既
設接続管付近の各々の鍔7をボルト・ナットで締結する
ことによって復旧できる。The removed double pipe part is the removed hard pipe 2
6a, 26b and the flanged half-split tube 23 are joined together to form the flexible tube 4 slightly longer than the length of the rigid tube 26a,
26b, the tapered outer peripheral surfaces of the existing connecting pipes 10 that are provided so as to face each other are inserted into the respective end holes of the flexible pipe 4, and the flanged half-split pipe 23 is inserted. It can be restored by fastening between the hard pipes 26a and 26b, and then fastening each collar 7 near each existing connection pipe with a bolt and a nut.
【0034】なお、鍔7部の端面孔と既設接続管10の
嵌入部の可撓管4との間に間隙が生じ、可撓管4の端部
15をテーパ内周面9とテーパ外周面11とで押圧挟持
できないときは、フランジ付き半割り短管部23のパッ
キン28の厚さを適宜に変えることによって押圧挟持で
きる。A gap is formed between the end surface hole of the flange 7 and the flexible tube 4 at the fitting portion of the existing connecting pipe 10, and the end 15 of the flexible tube 4 is tapered to the inner peripheral surface 9 and the outer peripheral surface of the taper. When it is not possible to press and clamp with 11, it can be pressed and clamped by appropriately changing the thickness of the packing 28 of the flanged half-divided short tube portion 23.
【0035】(第2実施例)図10は本発明の二重配管
39およびその継手部16の実施例を示すもので、本発
明の二重配管39を構成する硬管29はその端部にリン
グ状の突起30を有し、該二重配管39の端部は本発明
の継手部16を構成する鍔付き短管31に嵌入されて成
る。該鍔付き短管31は、硬管で構成された短管の片側
端に鍔7を、他側端側の外周面にねじ32を有すると共
に、該片側端側の管孔に鍔端面8からねじ32側に内周
面が縮小するテーパ状内周面9を、該他側端側の管孔に
縮径するテーパ内壁33を有する。(Second Embodiment) FIG. 10 shows an embodiment of the double pipe 39 of the present invention and the joint portion 16 thereof. The hard pipe 29 constituting the double pipe 39 of the present invention is provided at the end thereof. It has a ring-shaped projection 30, and the end portion of the double pipe 39 is fitted into a short pipe 31 with a collar that constitutes the joint portion 16 of the present invention. The bridging short tube 31 has a brim 7 at one end of a short tube made of a hard tube, has a screw 32 on the outer peripheral surface at the other end, and has a tubular end on the one end from the brim end surface 8 A tapered inner peripheral surface 9 whose inner peripheral surface is contracted is provided on the screw 32 side, and a tapered inner wall 33 whose diameter is reduced to the tube hole on the other side end side is provided.
【0036】34は袋ナットを示し、該袋ナット34
は、ねじ36孔の奥壁35の中心に硬管29を挿通する
穴を有すると共に、該奥壁35に鍔付き短管31の内径
より小さい外径を有するリング状の適宜長さの突起37
を有する。パッキン38は鍔付き短管31のねじ32側
付近の管孔内周面と二重配管39を構成する硬管29の
外周面との間にリング状に介在して成る。Reference numeral 34 denotes a cap nut, and the cap nut 34
Has a hole for inserting the hard tube 29 in the center of the inner wall 35 of the screw 36, and a ring-shaped projection 37 of an appropriate length having an outer diameter smaller than the inner diameter of the collared short tube 31 on the inner wall 35.
Have. The packing 38 is formed in a ring shape between the inner peripheral surface of the tube hole near the screw 32 side of the flanged short tube 31 and the outer peripheral surface of the hard tube 29 forming the double pipe 39.
【0037】以上の構成であるから、鍔付き短管31を
隣合う鍔7にボルト13・ナット14によって締結した
後、袋ナット34を鍔付き短管31にねじ合することに
よって、パッキン38は袋ナット34の突起37によっ
て硬管29の端部に在るリング状突起30の側面に押し
付けられ、半径方向に膨脹し、鍔付き短管31と二重配
管を構成する硬管29との間隙を密封することが出来
る。従って、可撓管4と硬管29との間を気密化するこ
とが出来る。With the above structure, the short pipe 31 with the flange is fastened to the adjacent flange 7 by the bolts 13 and the nuts 14, and then the cap nut 34 is screwed into the short pipe 31 with the flange 38, so that the packing 38 is formed. The protrusion 37 of the cap nut 34 pushes against the side surface of the ring-shaped protrusion 30 at the end of the hard pipe 29, expands in the radial direction, and the gap between the brim short pipe 31 and the hard pipe 29 forming the double pipe. Can be sealed. Therefore, the space between the flexible tube 4 and the hard tube 29 can be made airtight.
【0038】可撓管4が破損しその可撓管4を有する二
重配管39を取り外す場合、該二重配管39は、袋ナッ
ト34のねじ36を鍔付き短管31から外し該袋ナット
34および該鍔付き短管31を二重配管中央側に移動す
ることによって可撓管4が露出するため、その露出した
可撓管4部を切断することによって、取り外すことが出
来る。When the flexible pipe 4 is damaged and the double pipe 39 having the flexible pipe 4 is removed, the screw 36 of the cap nut 34 is removed from the short pipe 31 with the flange and the cap nut 34 of the double pipe 39 is removed. Also, since the flexible tube 4 is exposed by moving the flanged short tube 31 toward the center of the double pipe, it can be removed by cutting the exposed flexible tube 4 part.
【0039】(第3実施例)図11は本発明の二重管4
0およびその継手部16の別の実施例を示すもので、本
発明の二重管40の両端部は本発明の継手部を構成する
鍔付き短管41にそれぞれ嵌入されている。41は鍔付
き短管を示し、該鍔付き短管41は、硬管で構成された
短管の片側端に鍔7を、他側端側の外周面に、短管の中
心より放射状にかつ適当な間隔を置いた貫通ねじ孔42
を有すると共に、該片側端の管孔に鍔端面8から該他側
端側に内周面が縮小するテーパ状内周面9を有する。(Third Embodiment) FIG. 11 shows a double tube 4 of the present invention.
No. 0 and its joint portion 16 are shown as other examples, and both ends of the double pipe 40 of the present invention are fitted into the collared short pipes 41 constituting the joint portion of the present invention. Reference numeral 41 denotes a short tube with a collar, and the short tube with a collar 41 has a collar 7 at one end of the short tube made of a hard tube, and an outer peripheral surface on the other end side radially from the center of the short tube. Through screw holes 42 with appropriate spacing
And a tapered inner peripheral surface 9 whose inner peripheral surface is reduced from the flange end surface 8 to the other end side in the tube hole at the one end.
【0040】以上の構成であるから、鍔付き短管41を
隣合う鍔7にボルト13・ナット14によって締結した
後、該鍔付き短管は前記ねじ孔にボルト44をねじ合す
ることによって所要長さの二重配管構造体を得ることが
出来る。可撓管4が破損し該可撓管4を交換する場合、
前記ボルト44を弛め、硬管の両端部にある鍔付き短管
41を、二重配管40の中央側にずらし、露出した可撓
管4の各々の部分を切断することによって二重配管40
を取り外すことができる。With the above construction, after the short pipe 41 with a collar is fastened to the adjacent flange 7 by the bolt 13 and the nut 14, the short pipe with a collar is required by screwing a bolt 44 into the screw hole. It is possible to obtain a double piping structure having a length. When the flexible tube 4 is damaged and the flexible tube 4 is replaced,
The double pipe 40 is loosened by loosening the bolt 44, shifting the short pipes 41 with flanges at both ends of the hard pipe to the center of the double pipe 40, and cutting each exposed portion of the flexible pipe 4.
Can be removed.
【0041】取り外した二重配管40部分は、対向して
なる既設接続管17の端面間の距離に略同一長さの可撓
管4を両端に鍔付き短管41を有する硬管に挿通し、対
向してなる既設接続管17の各々のテーパ面を可撓管の
端部孔に嵌入し、それぞれの既設接続管部のフランジに
ボルト13・ナット14で引き寄せることによって連接
し、前記ボルト44を締め付けることによって硬管43
はその両端にある鍔付き短管に連接されて復旧できる。In the removed double pipe 40 portion, the flexible pipe 4 having substantially the same length as the distance between the end faces of the existing connecting pipe 17 facing each other is inserted into a hard pipe having a short pipe 41 with a collar at both ends. , The taper surfaces of the existing connection pipes 17 facing each other are fitted into the end holes of the flexible pipes, and the flanges of the existing connection pipes are connected by pulling the bolts 13 and the nuts 14 together to connect the bolts 44. By tightening the
Can be restored by connecting to the short pipe with a collar at both ends.
【0042】本実施例は、可撓管4と硬管43との間隙
は密封されていないため、可撓管4が破損した場合前記
鍔付き短管41のボルト44側端部から流体が漏洩する
という欠点があるものの、流体の成分や含有物の付着積
層を防止する機能を有し、かつ構造が簡単であるところ
から、簡易配管として有用である。In this embodiment, since the gap between the flexible tube 4 and the hard tube 43 is not sealed, when the flexible tube 4 is damaged, the fluid leaks from the end of the flanged short tube 41 on the bolt 44 side. However, it is useful as a simple pipe because it has a function of preventing the fluid components and inclusions from adhering and laminating, and has a simple structure.
【0043】[0043]
【発明の効果】以上のことにより、本発明の二重配管お
よびその継手部を管路に用いることによって、縮径によ
る配管の管孔洗浄や代替配管の新設等が不要となった。
また、縮径してもその縮径の程度が僅かであるから、流
量の減少程度は流量設定誤差範囲内程度のもので、管路
の縮径による設備の稼働能力および効率の減少が妨げら
れることとなった。更に、配管の縮径に起因する設備の
故障が無くなるため設備が安定して稼働するようになっ
た。従って、本発明の二重配管およびその継手部を流体
輸送用管路に用いることによる経済的効果は極めて大き
なものとなった。As described above, by using the double pipe of the present invention and the joint portion thereof in the pipe line, it becomes unnecessary to clean the pipe hole due to the diameter reduction and to install a new alternative pipe.
Further, even if the diameter is reduced, the degree of the diameter reduction is small, so the reduction in the flow rate is within the flow rate setting error range, and the reduction in the operating capacity and efficiency of the equipment due to the diameter reduction of the pipeline is hindered. It became a thing. Further, since the equipment failure due to the reduced diameter of the pipe is eliminated, the equipment can be operated stably. Therefore, the economical effect obtained by using the double pipe of the present invention and the joint portion thereof for the fluid transport pipe becomes extremely large.
【図1】図5のA−A断面図であり二重配管の横断面形
状を示す。FIG. 1 is a cross-sectional view taken along the line AA in FIG. 5, showing a cross-sectional shape of double pipes.
【図2】図7のB−B断面図であり二重配管の横断面形
状を示す。FIG. 2 is a cross-sectional view taken along the line BB of FIG. 7, showing a cross-sectional shape of the double pipe.
【図3】フランジ継手を有する二重配管の部分縦断面図
を示す。FIG. 3 shows a partial vertical sectional view of a double pipe having a flange joint.
【図4】ねじ継手を有する二重配管の部分縦断面図を示
す。FIG. 4 shows a partial longitudinal sectional view of a double pipe having a threaded joint.
【図5】二重配管継手部の縦断面図を示す。FIG. 5 shows a vertical sectional view of a double pipe joint portion.
【図6】二重配管継手部の縦断面図を示す。FIG. 6 shows a vertical sectional view of a double pipe joint portion.
【図7】二重配管継手部の縦断面図を示す。FIG. 7 shows a vertical sectional view of a double pipe joint portion.
【図8】本発明の二重配管およびその継手部の第1実施
例を示す図。FIG. 8 is a diagram showing a first embodiment of the double pipe and its joint of the present invention.
【図9】図8のA−A断面図を示す。9 is a cross-sectional view taken along the line AA of FIG.
【図10】本発明の二重配管およびその継手部の第2実
施例を示す図。FIG. 10 is a view showing a second embodiment of the double pipe and its joint of the present invention.
【図11】本発明の二重配管およびその継手部の第3実
施例を示す。FIG. 11 shows a third embodiment of the double pipe and its joint of the present invention.
1,39,40 二重配管 2 継手部 3,29,43 硬管 4 可撓管 5 間隙 6 小穴 7 鍔 8 鍔端面 9 テーパ状内周面 10,17 接
続管 11 テーパ状外周面 13,24,44
ボルト 14,25 ナット 15 可撓管の
端部 16 継手部 18 外側面 19,22,28,38 パッキン 20 鋼管 21 フランジ 23 フランジ付き半割り短管 26a〜26c
硬管 27 端面 30,37 突
起 31,41 鍔付き短管 32,36,42
ねじ 33 テーパ内壁 34 袋ナット 35 奥壁1,39,40 Double piping 2 Joint part 3,29,43 Hard tube 4 Flexible tube 5 Gap 6 Small hole 7 Collar 8 Collar end face 9 Tapered inner peripheral surface 10, 17 Connection pipe 11 Tapered outer peripheral surface 13, 24 , 44
Bolts 14,25 Nuts 15 Ends of flexible pipes 16 Joints 18 Outer side surfaces 19, 22, 28, 38 Packing 20 Steel pipes 21 Flange 23 Flange half split pipes 26a to 26c
Hard tube 27 End surface 30,37 Protrusion 31,41 Short tube with collar 32,36,42
Screw 33 Taper inner wall 34 Cap nut 35 Back wall
フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 FI 技術表示箇所 F16L 23/028 23/036 (72)発明者 益田 広幸 福岡県北九州市戸畑区飛幡町1番1号 新 日本製鐵株式会社八幡製鐵所内 (72)発明者 木場 洸幸 福岡県北九州市戸畑区飛幡町1番1号 新 日本製鐵株式会社八幡製鐵所内 (72)発明者 田村 洋二 福岡県北九州市戸畑区飛幡町1番1号 新 日本製鐵株式会社八幡製鐵所内Continuation of front page (51) Int.Cl. 5 Identification number Reference number in the agency FI Technical indication location F16L 23/028 23/036 (72) Inventor Hiroyuki Masuda No. 1 Hibatacho, Tobata-ku, Kitakyushu, Fukuoka Japan Steel Works Co., Ltd. Yawata Works (72) Inventor Tokuyuki Kiba 1-1 Tobahata-cho, Tobata-ku, Kitakyushu, Kitakyushu, Fukuoka In-house Yahata Works (72), Nippon Steel Co., Ltd. Yoji Tamura Tobata, Kitakyushu, Fukuoka Prefecture No. 1-1 Tobata-cho, Shin-Nippon Steel Co., Ltd. Yawata Works
Claims (3)
外周長を有する可撓管を挿通し、該可撓管の管孔に流体
を通すことを特徴とする流体輸送用二重配管。1. A fluid transport characterized by inserting a flexible tube having an outer peripheral length shorter than the inner peripheral length of the hard tube into the tube hole of the hard tube, and passing a fluid through the tube hole of the flexible tube. For double piping.
面が縮小するテーパ状内面とを有してなる2組の硬管を
各々の該鍔を対向して縦列し、各々の該硬管の管孔に該
管孔の内周長より短い外周長を有する可撓管を該鍔の端
面から該硬管の孔の外側に若干突出した状態に挿通し、
中央部に該鍔の端面の内径より大きい外径を両端部に該
硬管の内径より小さい外径を有すると共に該中央部から
該両端部側に向かって外径が縮小するテーパ状外面を有
する短筒を、各々の該硬管の管孔に在る可撓管の口元に
挿入し、硬管のテーパ面に可撓管の口元を介して該短筒
のテーパ面を嵌合し、各々の該鍔に設けた対向してなる
複数個の穴のそれぞれに頭付きボルトを連通し、該ボル
トにナットをねじ込んで、該ボルトの頭とナットとの間
に各々の該鍔を挟んで連結したことを特徴とする隣合う
流体輸送用二重配管を結合する継手。2. Two sets of hard pipes each having a flange at the end and a tapered inner surface having an inner peripheral surface that shrinks from the vicinity of the flange toward the central portion are arranged in tandem with each of the flanges facing each other. Inserting a flexible tube having an outer peripheral length shorter than the inner peripheral length of each of the hard tubes into the tube hole of each of the hard tubes in a state of slightly protruding from the end surface of the collar to the outside of the hole of the hard tube,
The central portion has an outer diameter larger than the inner diameter of the end surface of the brim, and the both end portions have an outer diameter smaller than the inner diameter of the hard pipe, and also have tapered outer surfaces whose outer diameter decreases from the central portion toward the both end sides. Insert the short cylinder into the mouth of the flexible tube in the tube hole of each of the hard tubes, and fit the taper surface of the short cylinder into the tapered surface of the hard tube through the mouth of the flexible tube. A headed bolt is communicated with each of a plurality of opposing holes provided in the collar, and a nut is screwed into the bolt, and the collar is sandwiched between the head and the nut of the bolt for connection. A joint for connecting adjacent double pipes for fluid transportation, which is characterized in that
孔を有する鍔と該鍔付近から中央部側に内周面が縮小す
るテーパ状内面を有してなる硬管に、該硬管の管孔に該
管孔の内周長より短い外周長を有する可撓管を該鍔の端
面から該硬管の孔の外側に若干突出した状態に挿通し、
片側端に鍔を、該鍔付近に該硬管の該鍔の端面の内径よ
り大きい外径を、他側端に該硬管の内径より小さい外径
を有し鍔付近から他側端に向かって外径が縮小するテー
パ状外面を有する鍔付き短筒を、該硬管の管孔に在る可
撓管の口元に挿入し、硬管のテーパ面に可撓管の口元を
介して該短筒のテーパ面を嵌合したことを特徴とする流
体輸送用二重配管の継手。3. A hard pipe having a collar having a plurality of holes at appropriate positions along the outer periphery and a tapered inner surface whose inner peripheral surface is reduced from the vicinity of the collar toward the central portion at the end, Insert a flexible tube having an outer peripheral length shorter than the inner peripheral length of the tube into the tube hole of the hard tube in a state of slightly protruding from the end surface of the flange to the outside of the hole of the hard tube,
A flange is provided at one end, an outer diameter larger than the inner diameter of the end surface of the flange of the hard pipe is provided near the flange, and an outer diameter smaller than the inner diameter of the hard pipe is provided at the other end from the vicinity of the flange to the other end. A short tube with a collar having a tapered outer surface whose outer diameter is reduced is inserted into the mouth of the flexible tube existing in the tube hole of the hard tube, and the taper surface of the hard tube is inserted through the mouth of the flexible tube. A double pipe joint for fluid transportation, characterized by fitting the tapered surface of a short cylinder.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4067502A JPH05272666A (en) | 1992-03-25 | 1992-03-25 | Double pipe and joint part thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4067502A JPH05272666A (en) | 1992-03-25 | 1992-03-25 | Double pipe and joint part thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH05272666A true JPH05272666A (en) | 1993-10-19 |
Family
ID=13346832
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4067502A Withdrawn JPH05272666A (en) | 1992-03-25 | 1992-03-25 | Double pipe and joint part thereof |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH05272666A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1199505A3 (en) * | 2000-10-17 | 2003-07-02 | Jorge Estrade Smith | Pipe union for multiple type of connections |
KR102218757B1 (en) * | 2019-12-12 | 2021-02-22 | 비케이엠 주식회사 | Manufacturing Method of Double Tube for Semiconductor Process |
-
1992
- 1992-03-25 JP JP4067502A patent/JPH05272666A/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1199505A3 (en) * | 2000-10-17 | 2003-07-02 | Jorge Estrade Smith | Pipe union for multiple type of connections |
KR102218757B1 (en) * | 2019-12-12 | 2021-02-22 | 비케이엠 주식회사 | Manufacturing Method of Double Tube for Semiconductor Process |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990608 |