JPH0130711Y2 - - Google Patents
Info
- Publication number
- JPH0130711Y2 JPH0130711Y2 JP1983085848U JP8584883U JPH0130711Y2 JP H0130711 Y2 JPH0130711 Y2 JP H0130711Y2 JP 1983085848 U JP1983085848 U JP 1983085848U JP 8584883 U JP8584883 U JP 8584883U JP H0130711 Y2 JPH0130711 Y2 JP H0130711Y2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- enlarged diameter
- joint
- portions
- pipe joint
- 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
Links
- 229910001220 stainless steel Inorganic materials 0.000 claims description 22
- 239000010935 stainless steel Substances 0.000 claims description 22
- 238000003780 insertion Methods 0.000 claims description 21
- 230000037431 insertion Effects 0.000 claims description 21
- 239000000565 sealant Substances 0.000 claims description 20
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 238000002788 crimping Methods 0.000 description 8
- 238000007789 sealing Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 210000002310 elbow joint Anatomy 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Description
【考案の詳細な説明】
〔産業の利用分野〕
本考案は、ステンレス鋼鋼管の継手に係り、特
に管端部とこれに挿入する鋼管継手との重合部が
シール剤を介して密着され、管内を流れる流体の
漏出防止を確実ならしめると共に、配管の長さ寸
法等を適宜に調節できるステンレス鋼鋼管の継手
に関するものである。[Detailed description of the invention] [Field of industrial application] The present invention relates to a joint for stainless steel pipes, and in particular, the overlapping part between the end of the pipe and the steel pipe joint inserted therein is tightly adhered via a sealant, and the inside of the pipe is sealed. The present invention relates to a joint for stainless steel pipes that ensures the prevention of leakage of fluid flowing through the pipe and allows the length and other dimensions of the pipe to be adjusted as appropriate.
従来、薄肉金属管、例えばステンレス鋼鋼管を
接続する場合、継手管を用いて、この継手管を鋼
管本体の管端部の外側に挿入し、所定の治具を用
いて管端部を径方向に圧縮し管外面に圧着させる
方法が行われている。
Conventionally, when connecting thin-walled metal pipes, such as stainless steel pipes, a joint pipe is used, the joint pipe is inserted outside the pipe end of the steel pipe body, and a specified jig is used to align the pipe end in the radial direction. A method of compressing the material and crimping it to the outside surface of the pipe is used.
この継手管を用いる方法は、管に加削加工を施
す場合のように強度低下をもたらすことがなく、
薄肉金属管の接続に適している。 This method of using a joint pipe does not cause a decrease in strength, unlike when machining the pipe.
Suitable for connecting thin-walled metal pipes.
また、溶接のように高度の技術を要することも
なく、比較的簡便に配管作業を行うことができる
利点がある。 Additionally, it does not require sophisticated techniques unlike welding, and has the advantage that piping work can be done relatively easily.
しかし、その反面、シール性および接続強度に
ついて十分な性能を確保することが問題点として
残るものである。 However, on the other hand, it remains a problem to ensure sufficient sealing performance and connection strength.
この種の従来例として、例えば実開昭56−6528
号公報に記載の管継手が知られている。 As a conventional example of this kind, for example,
A pipe joint described in the above publication is known.
これを第７図乃至第９図を参照して説明する。 This will be explained with reference to FIGS. 7 to 9.
第７図は圧着前の状態を示す断面図で、継手管
１の端部を拡大して管挿入部２を形成し、接続す
べき管３の端部を挿入してある。この管挿入部２
の内面と管３の外面の管には、シール剤４を介在
させてある。 FIG. 7 is a sectional view showing the state before crimping, in which the end of the joint pipe 1 is enlarged to form a pipe insertion part 2, into which the end of the pipe 3 to be connected is inserted. This tube insertion part 2
A sealant 4 is interposed between the inner surface of the tube 3 and the outer surface of the tube 3.
そして、径方向に２分割した治具５により管挿
入部２を挟着し、油圧等により治具５を矢印の方
向、すなわち径方向内向きに移動させる。 Then, the tube insertion portion 2 is clamped between the jig 5 divided into two in the radial direction, and the jig 5 is moved in the direction of the arrow, that is, inward in the radial direction, using hydraulic pressure or the like.
このとき、治具５の内面軸方向に設けられた２
条の突起６，７により管挿入部２は圧縮され、第
８図に示すように２条の環状段部８，９が形成さ
れて、その間にシール剤４が封じ込められると共
に、管挿入部２と管３とが連結されている。 At this time, 2 provided in the axial direction of the inner surface of the jig 5
The tube insertion portion 2 is compressed by the striped protrusions 6, 7, and two annular step portions 8, 9 are formed as shown in FIG. and pipe 3 are connected.
上記従来の管継手によると、継手管１の端部を
拡径して形成された管挿入部２の内周は、第７図
及び第８図に示すようにストレート管状である。
According to the conventional pipe joint described above, the inner periphery of the tube insertion portion 2 formed by expanding the diameter of the end of the joint pipe 1 has a straight tubular shape as shown in FIGS. 7 and 8.
このため、シール剤４は治具５による縮径時
に、管挿入部２の先端１０から流出し、管挿入部
２と管３との重合部において、シール剤４による
密封が不完全となるおそれがある。 Therefore, when the diameter is reduced by the jig 5, the sealant 4 flows out from the tip 10 of the tube insertion portion 2, and there is a risk that the sealing by the sealant 4 may become incomplete at the overlapping portion of the tube insertion portion 2 and the tube 3. There is.
確かに、２ケ所の突起６，７により圧着される
とき、段部８と９の間にシール剤４が封じ込めら
れることは、第８図に示されているが、実際に
は、段部８，９が形成されるときに、ストレート
管状の管挿入部２と管３との隙間が全体的に縮小
され、そこに介在されているシール剤４の大部分
が、管挿入部２の先端１０から押出され、このシ
ール剤４による密封効果が十分に奏されないとい
う問題点がある。 It is certainly shown in FIG. 8 that the sealant 4 is sealed between the stepped portions 8 and 9 when the two protrusions 6 and 7 are pressed together. . There is a problem in that the sealant 4 does not have a sufficient sealing effect.
さらに、継手管１の管挿入部２の内周が、スト
レート管であるため、次の問題点も生じる。 Furthermore, since the inner periphery of the tube insertion portion 2 of the joint tube 1 is a straight tube, the following problem also occurs.
すなわち、管３の端部１１を管挿入部２に挿入
する際、その挿入角度が少しでも傾くと、管３の
端部１１により、管挿入部２の内周に介装された
シール剤４が傷つけられたり、剥ぎ取られてスム
ーズな挿入ができないと共に、縮径してかしめた
後も挿入部のシールが不完全となり、管内を流れ
る流体が継手部から漏出するおそれがある。 That is, when inserting the end 11 of the tube 3 into the tube insertion section 2, if the insertion angle is even slightly tilted, the end 11 of the tube 3 will cause the sealant 4 interposed on the inner periphery of the tube insertion section 2 to The tube may be damaged or peeled off, making it impossible to insert it smoothly, and even after the diameter is reduced and caulked, the seal at the insertion portion may be incomplete, and the fluid flowing inside the tube may leak from the joint.
また、従来の継手方法は、継手管の端部を拡径
して、管本体の端部外側に嵌合する方式が一般的
である。 Furthermore, in the conventional joint method, the diameter of the end of the joint pipe is generally expanded and the joint pipe is fitted to the outside of the end of the pipe body.
このため、例えば配管現場の条件によつて管の
長さが不足した場合や、長すぎる場合などがある
が、その場合に継手管を適当寸法に切断して管本
体を適当な長さの過、不足を調整するようなこと
はできなかつた。 For this reason, for example, depending on the conditions at the piping site, the length of the pipe may be insufficient or too long. , nothing could be done to correct the shortage.
このような場合には、管本体を適当長さに切断
したり、継ぎ足したりすることになるが、そうす
ると管本体に無駄が出るばかりでなく、継手管の
接続個所が多くなつて作業に手間どるなどの問題
点があつた。 In such cases, the pipe body must be cut to an appropriate length or spliced, but this not only results in waste of the pipe body, but also increases the number of connections for the joint pipe, making the work time-consuming. There were other problems.
一方、第９図に示すように、取付面１３に角部
１４，１５がある場合、この角部１４，１５にエ
ルボ継手を配設し、このエルボ継手１２により折
曲がつて接続した敷設面１６，１７に位置する管
３を互いに連結している。 On the other hand, as shown in FIG. 9, when the mounting surface 13 has corners 14 and 15, elbow joints are provided at these corners 14 and 15, and the installation surface is bent and connected by the elbow joints 12. The tubes 3 located at 16 and 17 are connected to each other.
しかし、この継手方法によると、配管現場に多
数個のエルボ継手１２…を用意しておかなければ
ならないと共に、その連結作業も面倒であるとい
う問題点があつた。 However, according to this joint method, there are problems in that a large number of elbow joints 12 must be prepared at the piping site, and the connection work is troublesome.
本考案は、上記の問題点を解決するために提案
されたもので、次のように構成されている。
The present invention was proposed to solve the above problems, and is configured as follows.
すなわち、本考案は管本体の端部に短管継手を
挿入してなるステンレス鋼鋼管の継手装置におい
て、前記短管継手は軸方向全長に亘つて同一直径
の直管により構成し、一方、ステンレス鋼鋼管の
管端部には、管本体の側から順に、短管継手の挿
入部としての内径D1を有する第１拡径部と、シ
リコンゴムを用いたシール剤の塗着部としての内
径D2を有する第２拡径部と、短管継手の挿入ガ
イド部としての内径D3を有する第３拡径部とを
形成し、上記各内径寸法D1，D2，D3，を、D2＞
D1＝D3の関係に設け、かつ短管継手の両端部を
管端部の内側に挿入したうえ、前記第１拡径部と
第２拡径部と第３拡径部の外周を圧着して、軸方
向に所定の間隔で、複数のかしめ部を形成してな
ることを特徴とするものである。 That is, the present invention provides a stainless steel pipe coupling device in which a short pipe joint is inserted into the end of a pipe body, in which the short pipe joint is constituted by a straight pipe having the same diameter over the entire length in the axial direction; At the end of the steel pipe, in order from the side of the pipe body, there is a first enlarged diameter part having an inner diameter D 1 as the insertion part of the short pipe joint, and an inner diameter part as the part to which the sealant using silicone rubber is applied. A second enlarged diameter part having a diameter D 2 and a third enlarged diameter part having an inner diameter D 3 as an insertion guide part of the short pipe joint are formed, and each of the above inner diameter dimensions D 1 , D 2 , D 3 , D2 >
The relationship of D 1 = D 3 is established, both ends of the short pipe joint are inserted inside the pipe end, and the outer peripheries of the first enlarged diameter part, the second enlarged diameter part, and the third enlarged diameter part are crimped. A plurality of caulked portions are formed at predetermined intervals in the axial direction.
以下、本考案の実施例を第１図乃至第６図を参
照して説明する。
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 6.
第１図は接続前におけるステンレス鋼鋼管２
０，２０と短管継手２６の断面図である。 Figure 1 shows stainless steel pipe 2 before connection.
0, 20 and a sectional view of the short pipe joint 26.
このステンレス鋼管２０は、管本体２１と、管
本体２１の両端に位置する管端部２２Ａ，２２Ｂ
とを有しており、この管端部２２Ａ，２２Ｂに短
管継手２６の両端をそれぞれ挿入するものであ
る。 This stainless steel tube 20 includes a tube body 21 and tube ends 22A and 22B located at both ends of the tube body 21.
Both ends of the short pipe joint 26 are inserted into these pipe end portions 22A and 22B, respectively.
管端部２２Ａ，２２Ｂには、それぞれ管本体２
１の側から、順に短管継手２６の挿入部として、
内径寸法D1を有する第１拡径部２３Ａ，２３Ｂ
と、シール剤２７（第２図示）の塗着部としての
内径寸法D2を有する第２拡径部２４Ａ，２４Ｂ
と、短管継手２６の挿入ガイド部として内径寸法
D3を有する第３拡径部２５Ａ，２５Ｂとが形成
されている。 The tube ends 22A and 22B each have a tube body 2.
From the side of 1, as the insertion part of the short pipe joint 26,
First enlarged diameter portions 23A, 23B having an inner diameter dimension D 1
and second enlarged diameter portions 24A, 24B having an inner diameter dimension D 2 and serving as a coating portion for the sealant 27 (second illustration).
and the inner diameter dimension as the insertion guide part of the short pipe joint 26.
Third enlarged diameter portions 25A and 25B having a diameter D 3 are formed.
これら各内径寸法において、第１拡径部２３
Ａ，２３Ｂの寸法D1と第３拡径部２５Ａ，２５
Ｂの寸法D3は、D1＝D3の関係に設けてある。 In each of these inner diameter dimensions, the first enlarged diameter portion 23
Dimensions D 1 of A, 23B and third enlarged diameter portions 25A, 25
The dimension D3 of B is set in the relationship D1 = D3 .
さらに、第２拡径部２４Ａ，２４Ｂの内径寸法
D2は、D2＞D1＝D3の関係に設けられている。 Furthermore, the inner diameter dimensions of the second enlarged diameter portions 24A, 24B
D 2 is provided in the relationship D 2 >D 1 =D 3 .
また、管本体２１の内径寸法D4に対し、内径
寸法D1，D3はD4＜D1＝D3関係に設けられてい
る。 Furthermore, with respect to the inner diameter dimension D 4 of the tube body 21, the inner diameter dimensions D 1 and D 3 are set in a relationship D 4 <D 1 =D 3 .
一方、短管継手２６は軸方向全長に亘つて同一
直径の直管により適宜の長さに形成されると共
に、その外径D5はD5≦D1＝D3の関係に設けられ
ている。 On the other hand, the short pipe joint 26 is formed of a straight pipe having the same diameter over the entire length in the axial direction and has an appropriate length, and its outer diameter D 5 is set in the relationship D 5 ≦D 1 = D 3 . .
本考案の管継手にあつては、管端部２２Ａ，２
２Ｂの第２拡径部２４Ａ，２４Ｂの深さ寸法は、
例えばD2−D3＝２〜３mm程度に形成され、この
第２拡径部２４Ａ，２４Ｂに厚さ１〜1.5mmのシ
リコンゴムのようなシール剤２７を塗着させる。 In the pipe joint of the present invention, the pipe ends 22A, 2
The depth dimension of the second enlarged diameter portions 24A and 24B of 2B is
For example, the second enlarged diameter portions 24A, 24B are formed to have D 2 −D 3 =2 to 3 mm, and a sealant 27 such as silicone rubber with a thickness of 1 to 1.5 mm is applied.
このとき、シール剤２７の内面と第１拡径部２
３Ａ，２３Ｂと第２拡径部２５Ａ，２５Ｂの内周
は、同一面となるようにする。 At this time, the inner surface of the sealant 27 and the first enlarged diameter portion 2
The inner circumferences of the second enlarged diameter portions 3A, 23B and the second enlarged diameter portions 25A, 25B are made to be on the same plane.
このように第２拡径部２４Ａ，２４Ｂ内にシー
ル剤２７を塗着した後、各管端部２２Ａ，２２Ｂ
に短管継手２６の両端部をそれぞれ挿入し、その
先端２８Ａ，２８Ｂを管本体２１と第１拡径部２
３Ａ，２３Ｂの接続段部２９Ａ，２９Ｂに当てが
つて止める。 After applying the sealant 27 inside the second enlarged diameter portions 24A and 24B in this way, each tube end portion 22A and 22B
Insert both ends of the short pipe joint 26 into the pipe body 21 and the first enlarged diameter part 2, and insert the ends 28A and 28B into the pipe body 21
3A, 23B against the connecting step portions 29A, 29B and stop.
しかして、短管継手２６を管端部２２Ａ，２２
Ｂに挿入する際、例え短管継手２６の挿入角度が
若干傾いたとしても、その傾きは挿入ガイド部の
働きをする第３拡径部２５Ａ，２５Ｂによつて修
正され、第２拡径部２４Ａ，２４Ｂを通過すると
きは、短管継手２６と管端部２２Ａ，２２Ｂの軸
線がそろい、よつて第２拡径部２４Ａ，２４Ｂ内
に塗着されているシール剤２７が短管継手２６の
先端２８Ａ，２８Ｂによつて傷つけられたり、削
り取られるおそれがないものである。 Thus, the short pipe joint 26 is connected to the pipe ends 22A, 22.
Even if the insertion angle of the short pipe joint 26 is slightly inclined when inserted into the tube B, the inclination is corrected by the third enlarged diameter portions 25A and 25B that function as insertion guides, and the second enlarged diameter portion 24A, 24B, the axes of the short pipe joint 26 and the pipe ends 22A, 22B are aligned, so that the sealant 27 applied inside the second enlarged diameter portions 24A, 24B passes through the short pipe joint 26. There is no risk of it being scratched or scraped off by the tips 28A, 28B.
このようにして短管継手２６の両端を互いに接
続すべき管端部２２Ａ，２２Ｂの内側に挿入した
うえ、管端部２２Ａ，２２Ｂの外周から図示省略
するダイスで押圧する。 In this way, both ends of the short pipe joint 26 are inserted inside the pipe ends 22A, 22B to be connected to each other, and then pressed from the outer periphery of the pipe ends 22A, 22B with a die (not shown).
ダイスの内面には、軸方向に隔てられて複数の
円弧状の突起が半径方向内向きに突出されてい
る。そして、ダイスの分割部を中心方向に押圧移
動させるとき、円弧状突起が環状につながり、管
端部２２Ａ，２２Ｂと短管継手２６は一体に圧縮
され、且つ第５図に示すように軸方向に所定間隔
で複数個の略Ｖ字状かしめ部３０，３０，…が形
成される。 On the inner surface of the die, a plurality of arcuate projections are spaced apart in the axial direction and protrude radially inward. When the divided portion of the die is pressed and moved toward the center, the arcuate projections are connected in an annular manner, the tube ends 22A, 22B and the short tube joint 26 are compressed together, and the axial direction is moved as shown in FIG. A plurality of approximately V-shaped caulking portions 30, 30, . . . are formed at predetermined intervals.
このとき、第２拡径部２４Ａ，２４Ｂも縮径さ
れて、その内部に塗着されているシール剤２７の
一部は、第１拡径部２３Ａ，２３Ｂと第３拡径部
２５Ａ，２５Ｂ側にも押出される。よつて、ダイ
スによる縮径時、管端部２２Ａ，２２Ｂと短管継
手２６の間からシール剤２７が外部に排出される
ことがなく、良好なシール性が発揮される。 At this time, the second enlarged diameter parts 24A, 24B are also reduced in diameter, and a part of the sealant 27 coated inside them is transferred to the first enlarged diameter parts 23A, 23B and the third enlarged diameter parts 25A, 25B. It is also pushed out to the side. Therefore, when the diameter is reduced by the die, the sealant 27 is not discharged to the outside from between the tube ends 22A, 22B and the short pipe joint 26, and good sealing performance is exhibited.
また、この実施例によると、第６図のような配
管態様とすることができる。 Further, according to this embodiment, a piping configuration as shown in FIG. 6 can be provided.
つまり、配管取付面１３の角部１４，１５にお
いては、管本体２１を直接折曲げて配管し、直線
配管部において短管継手２６を用いて各ステンレ
ス鋼鋼管２０，２０同志を連結することができ
る。 In other words, the pipe body 21 can be bent directly at the corners 14 and 15 of the pipe mounting surface 13, and the stainless steel pipes 20 and 20 can be connected to each other using the short pipe joints 26 at the straight pipe parts. can.
したがつて、この実施例によると、上記第９図
に示す従来例のように、配管取付面１３の角部１
４，１５にエルボ継手を必要とせず、且つこのエ
ルボ継手の配管現場での連結作業の手間も省ける
ものである。 Therefore, according to this embodiment, unlike the conventional example shown in FIG.
4 and 15 are not required, and the trouble of connecting the elbow joints at the piping site can be saved.
さらに、所定長さのステンレス鋼鋼管２０，２
０，…を短管継手２６を介して複数本連結して配
管する場合において、配管現場の状況により、ス
テンレス鋼鋼管２０の長さが余る場合や、逆に不
足する事態が生じることがある。 Further, a predetermined length of stainless steel pipe 20, 2
In the case of connecting a plurality of stainless steel pipes 20 through short pipe joints 26 and piping them, depending on the situation at the piping site, the length of the stainless steel pipes 20 may be excessive or may be insufficient.
この場合、予め拡径処理が施された管端部２２
Ａ，２２Ｂを有するステンレス鋼鋼管２０を切断
せず、逆に配管現場において、短管継手２６を適
宜の長さに切断して使用することにより、ステン
レス鋼鋼管２０の余剰分や不足分を補つて、所定
の配管を行うことができる簡便さがあるものであ
る。 In this case, the tube end 22 is subjected to diameter expansion treatment in advance.
Instead of cutting the stainless steel pipe 20 having A and 22B, on the contrary, by cutting the short pipe joint 26 to an appropriate length at the piping site and using it, it is possible to compensate for the surplus or shortage of the stainless steel pipe 20. Therefore, it is easy to perform predetermined piping.
本考案に係るステンレス鋼鋼管の継手装置によ
ると、従来と異なつて短管継手には何らの加工も
施さず直管を使用し、これに対して、鋼管本体の
管端部に第１、第２、第３の拡径部を施すもので
あるから、その拡径部の加工作業が容易である。
つまり、一般的に軸方向寸法が短い短管継手の両
端部に前述の第１、第２、第３の拡径部を加工す
ることは、短管継手自体の固定手段がないことも
相俟つて非常に困難であるが、長尺のステンレス
鋼鋼管の管端部にこれら第１、第２、第３拡径部
を加工することは容易である。しかも、管端状況
により、接続するステンレス鋼鋼管に長さ寸法の
余分や不足が生じたときは直管である短管継手を
現場で適宜の長さに切断することにより容易に調
整できるので、従来のように取扱いに困難を伴う
長尺のステンレス鋼鋼管の端部を切断する作業が
なくてすみ、継手部の調整連結作業を迅速に行う
ことができるものである。
According to the stainless steel pipe coupling device of the present invention, unlike the conventional method, the short pipe coupling uses a straight pipe without any processing, and in contrast, the first and second pipes are attached to the end of the steel pipe body. 2. Since the third enlarged diameter portion is provided, the machining work of the enlarged diameter portion is easy.
In other words, machining the aforementioned first, second, and third enlarged diameter portions on both ends of a short pipe joint, which generally has a short axial dimension, is difficult due to the fact that there is no fixing means for the short pipe joint itself. However, it is easy to process these first, second, and third enlarged diameter portions at the end of a long stainless steel pipe. Furthermore, if the length of the stainless steel pipe to be connected is excessive or insufficient due to the pipe end situation, this can be easily adjusted by cutting the straight short pipe joint to the appropriate length on site. This eliminates the need to cut the ends of long stainless steel pipes, which is difficult to handle, as in the past, and allows for quick adjustment and connection of joints.
さらに本考案の継手装置によると、管端部の内
側に短管継手を挿入する際、第３拡径部が短管継
手の挿入ガイドとなるので、短管継手が傾いた状
態で管端部方向に挿入されようとしても、その傾
きは第３拡径部によつて修正され、その奥に位置
する第２拡径部の内側に塗着されたシール剤が短
管継手の端部により傷つけられたり、削り取られ
るなどの不具合をなくすることができる。 Furthermore, according to the coupling device of the present invention, when inserting the short pipe joint inside the pipe end, the third enlarged diameter portion serves as an insertion guide for the short pipe joint, so that the short pipe joint is not inserted into the pipe end in an inclined state. Even if the pipe is inserted in the opposite direction, its inclination will be corrected by the third enlarged diameter part, and the sealant applied to the inside of the second enlarged diameter part located at the back will be damaged by the end of the short pipe joint. It is possible to eliminate problems such as being scratched or scraped off.
また、シール剤が塗着される第２拡径部の両側
には、この第２拡径部より径小の第１拡径部と第
３拡径部が存在している。このため、管端部の外
周側を圧着加工するとき、第２拡径部の縮径によ
り押出されるシール剤は、短管継手の外周と第１
縮径部と第３縮径部との間の狭い間隙に圧入さ
れ、継手部のシール性能は一層向上するものであ
る。 Furthermore, on both sides of the second enlarged diameter section to which the sealant is applied, there are a first enlarged diameter section and a third enlarged diameter section that are smaller in diameter than the second enlarged diameter section. Therefore, when crimping the outer circumferential side of the pipe end, the sealant extruded by the diameter reduction of the second enlarged diameter part is applied to the outer circumference of the short pipe joint and the first
It is press-fitted into the narrow gap between the reduced diameter part and the third reduced diameter part, and the sealing performance of the joint part is further improved.
つまり、シール剤は従来のごとく圧着加工時に
外部に排出されないで、狭い間隙に封じ込めるこ
とができるので、この点においてシール効果が十
分発揮される。 In other words, the sealing agent is not discharged to the outside during the crimping process as in the conventional case, but can be confined in a narrow gap, so that the sealing effect is fully exhibited in this respect.
しかも、第２拡径部は、その両側の第１拡径部
及び第３拡径部より径が大であるから、その内側
に十分な量のシール剤を塗着することが可能とな
るなどの効果がある。 Moreover, since the second enlarged diameter part has a larger diameter than the first enlarged diameter part and the third enlarged diameter part on both sides, it is possible to apply a sufficient amount of sealant to the inside thereof. There is an effect.
第１図は本考案に係るステンレス鋼鋼管継手の
接続前の断面図、第２図は接続後で圧着前の断面
図、第３図は第２図Ａ−Ａ断面図、第４図は第２
図Ｂ−Ｂ断面図、第５図は圧着後の断面図、第６
図は本考案の継手による配管例の説明図、第７
図、第８図は従来の管継手の圧着前と圧着後の断
面図、第９図はエルボ継手を用いた従来の配管例
の説明図である。
２０……ステンレス鋼鋼管、２１……管本体、
２２Ａ，２２Ｂ……管端部、２３Ａ，２３Ｂ……
第１拡径部、２４Ａ，２４Ｂ……第２拡径部、２
５Ａ，２５Ｂ……第３拡径部、２６……短管継
手、２７……シール剤、２８Ａ，２８Ｂ……端
部。
Fig. 1 is a sectional view of the stainless steel pipe fitting according to the present invention before connection, Fig. 2 is a sectional view after connection and before crimping, Fig. 3 is a sectional view taken along line A-A in Fig. 2, and Fig. 4 is a sectional view of the stainless steel pipe fitting before connection. 2
Figure B-B cross-sectional view, Figure 5 is a cross-sectional view after crimping, Figure 6 is a cross-sectional view after crimping.
Figure 7 is an explanatory diagram of an example of piping using the joint of the present invention.
8 are sectional views of a conventional pipe joint before and after crimping, and FIG. 9 is an explanatory diagram of an example of conventional piping using an elbow joint. 20...Stainless steel pipe, 21...Pipe body,
22A, 22B...Pipe end, 23A, 23B...
First enlarged diameter part, 24A, 24B... Second enlarged diameter part, 2
5A, 25B... Third enlarged diameter portion, 26... Short pipe joint, 27... Sealing agent, 28A, 28B... End portion.
Claims (1)
テンレス鋼鋼管の継手装置において、前記短管継
手２６は軸方向全長に亘つて同一直径の直管によ
り構成し、一方、ステンレス鋼鋼管２０の管端部
２２Ａ，２２Ｂには、管本体２１の側から順に、
短管継手２６の挿入部としての内径D1を有する
第１拡径部２３Ａ，２３Ｂと、シール剤２７の塗
着部としての内径D2を有する第２拡径部２４Ａ，
２４Ｂと、短管継手２６の挿入ガイド部としての
内径D3を有する第３拡径部２５Ａ，２５Ｂとを
形成し、上記各内径寸法D1，D2，D3をD2＞D1＝
D3の関係に設け、かつ短管継手２６の両端部を
管端部２２Ａ，２２Ｂの内側に挿入したうえ、前
記第１拡径部２３Ａ，２３Ｂと第２拡径部２４
Ａ，２４Ｂと第３拡径部２５Ａ，２５Ｂの外周を
圧着して、軸方向に所定の間隔で、複数のかしめ
部３０を形成してなるステンレス鋼鋼管の継手装
置。 In a stainless steel pipe coupling device in which a short pipe joint 26 is inserted into the end of the pipe body 21, the short pipe joint 26 is constituted by a straight pipe having the same diameter over the entire length in the axial direction, while the stainless steel pipe 20 In the tube end portions 22A and 22B, in order from the tube body 21 side,
First enlarged diameter portions 23A, 23B having an inner diameter D 1 as an insertion portion of the short pipe joint 26, and a second enlarged diameter portion 24A having an inner diameter D 2 as a portion to which the sealant 27 is applied.
24B, and third enlarged diameter portions 25A and 25B having an inner diameter D 3 as insertion guide portions of the short pipe joint 26 are formed, and the inner diameter dimensions D 1 , D 2 , D 3 are set so that D 2 >D 1 =
D 3 relationship, and both ends of the short pipe joint 26 are inserted inside the pipe ends 22A, 22B, and the first enlarged diameter parts 23A, 23B and the second enlarged diameter part 24
A stainless steel pipe coupling device in which the outer peripheries of A, 24B and third enlarged diameter portions 25A, 25B are crimped to form a plurality of caulked portions 30 at predetermined intervals in the axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8584883U JPS59191486U (en) | 1983-06-07 | 1983-06-07 | stainless steel pipe fitting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8584883U JPS59191486U (en) | 1983-06-07 | 1983-06-07 | stainless steel pipe fitting equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59191486U JPS59191486U (en) | 1984-12-19 |
| JPH0130711Y2 true JPH0130711Y2 (en) | 1989-09-20 |
Family
ID=30215806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8584883U Granted JPS59191486U (en) | 1983-06-07 | 1983-06-07 | stainless steel pipe fitting equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59191486U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008275168A (en) * | 2007-05-05 | 2008-11-13 | Visteon Global Technologies Inc | Connection structure of conduit, and its formation method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS566528B2 (en) * | 1975-04-30 | 1981-02-12 | ||
| JPS566525B2 (en) * | 1975-07-02 | 1981-02-12 | ||
| JPS5626630A (en) * | 1979-08-11 | 1981-03-14 | Osaka Gas Co Ltd | Jointing method for pipe |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS566528U (en) * | 1979-06-29 | 1981-01-21 | ||
| JPS566525U (en) * | 1979-06-29 | 1981-01-21 |
-
1983
- 1983-06-07 JP JP8584883U patent/JPS59191486U/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS566528B2 (en) * | 1975-04-30 | 1981-02-12 | ||
| JPS566525B2 (en) * | 1975-07-02 | 1981-02-12 | ||
| JPS5626630A (en) * | 1979-08-11 | 1981-03-14 | Osaka Gas Co Ltd | Jointing method for pipe |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008275168A (en) * | 2007-05-05 | 2008-11-13 | Visteon Global Technologies Inc | Connection structure of conduit, and its formation method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59191486U (en) | 1984-12-19 |
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