JPH1019175A - Pipe fitting structure - Google Patents
Pipe fitting structureInfo
- Publication number
- JPH1019175A JPH1019175A JP8171391A JP17139196A JPH1019175A JP H1019175 A JPH1019175 A JP H1019175A JP 8171391 A JP8171391 A JP 8171391A JP 17139196 A JP17139196 A JP 17139196A JP H1019175 A JPH1019175 A JP H1019175A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- pipe joint
- hand thread
- thread
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
- F16L15/001—Screw-threaded joints; Forms of screw-threads for such joints with conical threads
- F16L15/003—Screw-threaded joints; Forms of screw-threads for such joints with conical threads with sealing rings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
(57)【要約】
【課題】 管継手による管の接合施工時間の短縮。
【解決手段】 管１Ａの左端のねじ部３（右ねじ）に管
継手２の右端のねじ部４ａ（右ねじ）を差し込み、管継
手２の左端のねじ部４ｂ（左ねじ）に次の管１Ｂの右端
のねじ部３（左ねじ）を差し込む。次いで、管継手２を
管１Ａに対して回転して締めていくことにより、管継手
２の両端において、管１Ａおよび管１Ｂが接合される。
接合作業の最後に管１Ｂを管継手２に対して回転して締
め付ければ接合が終了する。
(57) [Summary] [Problem] To shorten the time required for joining pipes with pipe joints. SOLUTION: A right-hand thread 4a (right-hand thread) of a pipe fitting 2 is inserted into a left-hand thread 3 (right-hand thread) of a pipe 1A, and the next pipe is inserted into a left-hand thread 4b (left-hand thread) of the pipe fitting 2. Insert the right-hand thread 3 (left-hand thread) of 1B. Next, the pipe 1A and the pipe 1B are joined at both ends of the pipe joint 2 by rotating and tightening the pipe joint 2 with respect to the pipe 1A.
At the end of the joining operation, if the pipe 1B is rotated and fastened to the pipe joint 2, the joining is completed.
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、ガス、水道管等
の管継手構造に関し、詳しくは、迅速な接合を可能とし
て接合時間を短縮し、現地施工効率を向上するための管
継手を介した管の接合に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint structure for gas, water pipes and the like, and more particularly, to a pipe joint structure for enabling quick joining, shortening joining time, and improving on-site construction efficiency. It relates to the joining of tubes.
【０００２】[0002]
【従来の技術】従来、埋設される鋼管の接合には、溶接
接合、メカニカル継手（ジョイント）およびねじ継手等
によるのが一般的であった。2. Description of the Related Art Conventionally, steel pipes to be buried are generally joined by welding, mechanical joints (joints), screw joints, or the like.
【０００３】[0003]
【発明が解決しようとする課題】上記の従来技術による
鋼管の接合方法においては以下の問題がある。 溶接接合は専門技術者が必要であり、しかも、接合時
間がかかる。The above-mentioned prior art method for joining steel pipes has the following problems. Welding requires specialized technicians, and it takes a long time to join.
【０００４】メカニカル継手は、接合は簡単である
が、軸力に対する抵抗が低く、且つ、大口径のものは少
なく、小口径が一般的である。 ねじ継手は、ＪＩＳ Ｂ ０２０３に規定される「管
用テーパねじ」が代表的であるが、ねじ継手による施工
では、ねじ付管を１本ずつ足していく。このような、ね
じ継手による接合は、引張軸力が作用すると、ねじ部で
破断を生じ、鋼管の持つ高い強度を利用できない。一
方、強度を向上させるためには、管端部分の肉厚を増肉
し、そこにねじを加工する方法も考えられる。しかしな
がら、従来のねじ継手においては、接合のために管を回
転させなければならず、埋設管では、定尺４〜５ｍもの
長さとなるため、管を接合のために回転させることが困
難であり、大口径になるほど作業性が低下するといった
問題がある（以下、ねじ継手による施工を「先行技術」
という）。[0004] Although mechanical joints are easy to join, they have low resistance to axial force, and few have large diameters, and generally have small diameters. The typical threaded joint is a “taper thread for pipe” specified in JIS B0203. In the construction using a threaded joint, threaded pipes are added one by one. In such joining by a threaded joint, when a tensile axial force acts, a break occurs in the threaded portion, and the high strength of the steel pipe cannot be used. On the other hand, in order to improve the strength, a method of increasing the wall thickness of the pipe end portion and processing a screw there is also conceivable. However, in a conventional threaded joint, the pipe must be rotated for joining, and a buried pipe has a length of 4 to 5 m, so it is difficult to rotate the pipe for joining. However, there is a problem that the workability decreases as the diameter becomes larger (hereinafter, the construction using a threaded joint is referred to as “prior art”).
).
【０００５】従って、この発明の目的は、上述の問題を
解決し、ねじ接合を用いる管継手において、接合に要す
る時間を短縮し、現地での作業効率を向上することがで
きる管継手構造を提供することにある。Accordingly, an object of the present invention is to solve the above-mentioned problems, and to provide a pipe joint structure which can reduce the time required for the connection and improve the work efficiency on site in the pipe joint using the screw connection. Is to do.
【０００６】[0006]
【課題を解決するための手段】請求項１記載の発明は、
一方の端に左ねじ部を有し、他方の端に右ねじ部を有す
る管と、一方の端に前記管の他方の端に螺合可能な右ね
じ部を有し、他方の端に前記管と同じ構造を有する次の
管の一方の端に螺合可能な左ねじ部を有する短管からな
る管継手とからなり、前記管と前記管継手とを交互に連
結可能であることに特徴を有するものである。According to the first aspect of the present invention,
A tube having a left-hand thread at one end, a right-hand thread at the other end, and a right-hand thread at one end capable of being screwed to the other end of the tube, and the other end having A pipe joint consisting of a short pipe having a left-hand threaded portion that can be screwed to one end of the next pipe having the same structure as the pipe, characterized in that the pipe and the pipe joint can be connected alternately. It has.
【０００７】請求項２記載の発明は、請求項１記載の発
明において、前記管および管継手の前記ねじ部がテーパ
ねじからなることに特徴を有するものである。請求項３
記載の発明は、請求項１または２記載の発明において、
前記管継手の前記ねじ部の端部にシールリングが取り付
けられていることに特徴を有するものである。A second aspect of the present invention is characterized in that, in the first aspect of the present invention, the thread portion of the pipe and the pipe joint is formed of a tapered thread. Claim 3
The invention described in claim 1 is the invention according to claim 1 or 2,
The pipe joint is characterized in that a seal ring is attached to an end of the threaded portion.
【０００８】請求項４記載の発明は、請求項１、２また
は３記載の発明において、前記管の前記ねじ部が増肉さ
れていることに特徴を有するものである。請求項５記載
の発明は、請求項１、２、３または４記載の発明におい
て、前記管および前記管継手の内部に防食のための被覆
が施されていることに特徴を有するものである。A fourth aspect of the present invention is characterized in that, in the first, second or third aspect of the present invention, the thread portion of the pipe is thickened. A fifth aspect of the present invention is characterized in that, in the first, second, third or fourth aspect of the present invention, a coating for corrosion protection is applied to the inside of the pipe and the pipe joint.
【０００９】管の他方の端の右ねじに管継手の一方の端
の右ねじを差し込み、管継手の他方の端の左ねじに次の
新しい管の一方の端の左ねじを差し込み、管継手をその
両端において締め付ける方向に回転することにより、管
継手の両端において前記両管が同時に管継手と接合され
る。このように、接合は管継手の回転により、管の回転
はほとんど必要ない。Insert the right-hand thread at one end of the fitting into the right-hand thread at the other end of the pipe, and insert the left-hand thread at one end of the next new pipe into the left-hand thread at the other end of the fitting. Are rotated in the direction of tightening at both ends thereof, so that the two pipes are simultaneously joined to the pipe joint at both ends of the pipe joint. In this way, the joining requires little rotation of the pipe due to the rotation of the pipe joint.
【００１０】[0010]
【発明の実施の形態】次に、この発明の実施の形態を図
面を参照しながら説明する。図１はこの発明の一実施態
様を一部を断面で示す正面図、図２は管の接合前の状態
で示す正面図、図３は管の接合後の状態で示す正面図で
ある。図１において、管１は上半部を断面図で示されて
いる。この発明の管継手構造は、管１と管継手２とから
なり、管１と管継手２とを交互に連結可能な構成となっ
ている。管１の両端にはねじ部３が設けられている。管
１のねじ部３の部分は、肉厚が増肉されてなっている。
短管からなる管継手２の両端にはねじ部４が設けられて
いる。Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view partially showing a cross section of one embodiment of the present invention, FIG. 2 is a front view showing a state before joining pipes, and FIG. 3 is a front view showing a state after joining pipes. In FIG. 1, the tube 1 is shown in a sectional view in the upper half. The pipe joint structure of the present invention includes a pipe 1 and a pipe joint 2, and has a configuration in which the pipe 1 and the pipe joint 2 can be connected alternately. Threads 3 are provided at both ends of the tube 1. The wall of the threaded portion 3 of the tube 1 is thickened.
Screw portions 4 are provided at both ends of the pipe joint 2 made of a short pipe.
【００１１】管１の両端のねじ部３においては、片方
（左端）を通常ねじ継手に使用される右ねじ、他方（右
端）を左ねじとする。管継手２の両端のねじ部４は、片
方（左端）を管１の右ねじと螺合可能な右ねじ、他方
（右端）を管１の左ねじと螺合可能な左ねじとする。こ
のように、管継手２の両端の管１との接合部において
は、必ず、一方の端は左ねじと左ねじ、および、他方の
端は右ねじと右ねじ、となるようにカップリングするこ
とが必要である。In the threaded portions 3 at both ends of the tube 1, one (left end) is a right-hand thread used for a normal threaded joint, and the other (right end) is a left-hand thread. One end (left end) of the threaded portions 4 at both ends of the pipe joint 2 is a right-hand screw that can be screwed with the right-hand thread of the pipe 1, and the other (right end) is a left-hand screw that can be screwed with the left-hand thread of the pipe 1. As described above, at the joint between the pipe 1 at both ends of the pipe joint 2, the coupling is always performed such that one end is left-handed and left-handed and the other end is right-handed and right-handed. It is necessary.
【００１２】また、雄ねじ、雌ねじの配置組合せにおい
ては、雄ねじと雌ねじとのカップリングが確保できれば
それでよく、どのように配置しても問題はない。即ち、
図１に示すように、管継手２の両端を雄ねじとした場合
は、管１の両端は雌ねじとなり、あるいは、管継手の一
端を雌ねじ、他端を雌ねじとした場合は、管も一端が雄
ねじ、他端が雌ねじとなる。また、管継手２の一端を雌
ねじ、他端を雄ねじとしてもよい。Further, in the arrangement combination of the male screw and the female screw, it is sufficient if the coupling between the male screw and the female screw can be ensured, and there is no problem in any arrangement. That is,
As shown in FIG. 1, when both ends of the pipe joint 2 are male threads, both ends of the pipe 1 are female threads. , The other end is a female screw. Further, one end of the pipe joint 2 may be a female screw and the other end may be a male screw.
【００１３】次に、管の接合について説明する。既に接
合されている施工済みの管１Ａの左端のねじ部３（右ね
じ）に管継手２の右端のねじ部４ａ（右ねじ）を差し込
み、管継手２の左端のねじ部４ｂ（左ねじ）に次の新し
い管１Ｂの右端のねじ部３（左ねじ）を差し込み、パイ
プレンチやチェーントン等の工具（図示せず）を用いて
管継手２を管１Ａに対して回転して締めていけば、管継
手２の両端において、管１Ａおよび管１Ｂが接合され
る。接合作業の最後に管１Ｂを管継手２に対して回転し
て締め付ければ、管１Ｂと管継手２と管１Ａとの接合が
終了する。このとき、管１Ｂの回転量は、管１Ｂ自体を
初めから回転してねじを締め付ける先行技術のねじ接合
よりも極めて少ない。そのため、先行技術のねじ接合よ
りも作業性が良く、作業時間も短縮される。Next, the joining of pipes will be described. The right-hand thread 4a (right-hand thread) of the pipe joint 2 is inserted into the left-hand thread 3 (right-hand thread) of the already joined pipe 1A, and the left-hand thread 4b (left-hand thread) of the pipe joint 2 is inserted. Next, insert the right-hand thread 3 (left-hand thread) of the next new pipe 1B, and rotate the pipe joint 2 with respect to the pipe 1A using a tool (not shown) such as a pipe wrench or a chain ton. For example, at both ends of the pipe joint 2, the pipe 1A and the pipe 1B are joined. If the pipe 1B is rotated and fastened to the pipe joint 2 at the end of the joining operation, the connection between the pipe 1B, the pipe joint 2 and the pipe 1A is completed. At this time, the amount of rotation of the tube 1B is much smaller than that of the prior art screw joint in which the tube 1B itself is rotated from the beginning to tighten the screw. Therefore, the workability is better than that of the screw connection of the prior art, and the work time is shortened.
【００１４】[0014]
【実施例】次に、この発明を実施例によってより詳細に
説明する。図４はこの発明の実施例１を一部を断面で示
す正面図である。図４においては、管および管継手の上
半部が断面図で示されている。図４に示すように、鋼管
からなる管１は、あらかじめその両端に、その周囲に溶
接により設けられたねじ部３を有している。ねじ部３
は、管１の本体よりも肉厚が外側に増肉されてなってい
る。管継手２は鋼管からなる短管からなっている。管継
手２はその両端に、その周囲に溶接により設けられたね
じ部４を有している。管１および管継手２の内部には、
防食のための被覆が施されている。Next, the present invention will be described in more detail with reference to examples. FIG. 4 is a front view showing part of the first embodiment of the present invention in cross section. In FIG. 4, the upper half of the pipe and the pipe joint are shown in cross section. As shown in FIG. 4, the pipe 1 made of a steel pipe has screw portions 3 provided at both ends thereof in advance by welding around the pipe. Screw part 3
Is thicker than the body of the pipe 1 outside. The pipe joint 2 is a short pipe made of a steel pipe. The pipe joint 2 has, at both ends thereof, threaded portions 4 provided around the periphery thereof by welding. Inside the pipe 1 and the pipe joint 2,
Coating for anticorrosion is provided.
【００１５】図５はこの発明の実施例２を一部を断面で
示す正面図である。図５においては、管および管継手の
上半部が断面図で示されている。図５に示す実施例２の
管継手構造においては、管１のねじ部３が、管本体より
も肉厚が内側に増肉されてなっている点が、図４に示す
実施例１と異なっている。FIG. 5 is a front view partially showing a second embodiment of the present invention in section. In FIG. 5, the pipe and the upper half of the pipe joint are shown in cross section. The pipe joint structure of the second embodiment shown in FIG. 5 is different from the first embodiment shown in FIG. 4 in that the thread part 3 of the pipe 1 is thicker inward than the pipe body. ing.
【００１６】図６は管継手のねじ部の端部にＯリングが
設けられた状態を示す断面図である。図６に示すよう
に、図４および図５に示す管継手２のねじ部４の先端部
には、シールのためのＯリング５が設けられており、こ
れにより、シール性を向上することができる。FIG. 6 is a sectional view showing a state in which an O-ring is provided at the end of the threaded portion of the pipe joint. As shown in FIG. 6, an O-ring 5 for sealing is provided at the tip of the threaded portion 4 of the pipe joint 2 shown in FIGS. 4 and 5, thereby improving the sealing performance. it can.
【００１７】図４、図５において、管１、管継手２のね
じ部３、４のねじはＪＩＳ Ｂ ０２０３に規定される
「管用テーパねじ」と同様の山形状を持つねじによって
構成されている。ねじ部３および４のねじ形状は、前記
の山形状に限定されることはなく、それ以外のねじで構
成してもよい。In FIGS. 4 and 5, the threads of the threaded portions 3 and 4 of the pipe 1 and the pipe joint 2 are formed of threads having the same crest shape as the "taper thread for pipe" specified in JIS B0203. . The thread shape of the thread portions 3 and 4 is not limited to the above-mentioned thread shape, and may be constituted by other screws.
【００１８】また、図４および図５は、管１に雌ねじ、
管継手２に雄ねじの場合で示されているが、管に雄ね
じ、管継手に雌ねじで構成してもよく、その他組合せは
自由である。FIGS. 4 and 5 show that the pipe 1 has an internal thread,
Although the pipe joint 2 is shown with a male thread, the pipe may be formed with a male thread and the pipe joint may be formed with a female thread, and other combinations are free.
【００１９】図４〜図６に示す実施例１、２にかかる管
継手構造を使用して、外径１１４．３ｍｍ、管長５．５
ｍの寸法の管（１００Ａ）の接合を実施した。比較例と
して、先行技術を使用して管の接合を実施した。そし
て、接合作業の施工効率を比較した。その結果を表１に
示す。施工時間は、一箇所の接合に消費した時間で示さ
れている。Using the pipe joint structures according to the first and second embodiments shown in FIGS. 4 to 6, an outer diameter of 114.3 mm and a pipe length of 5.5 are used.
Joining of tubes (100A) of size m was performed. As a comparative example, tube joining was performed using the prior art. Then, the working efficiency of the joining operation was compared. Table 1 shows the results. The construction time is indicated by the time consumed for joining at one point.
【００２０】[0020]
【表１】 [Table 1]
【００２１】表１より、本発明のほうが比較例よりも作
業能率が良いことがわかる。From Table 1, it can be seen that the working efficiency of the present invention is better than that of the comparative example.
【００２２】[0022]
【発明の効果】以上説明したように、この発明によれ
ば、管の長さや口径にかかわらず一定の迅速な接合が得
られ、接合時間が短縮され、現地での作業効率が向上
し、かくして、工業上有用な効果がもたらされる。As described above, according to the present invention, constant and quick joining can be obtained regardless of the length and diameter of the pipe, the joining time is shortened, the work efficiency on site is improved, and Thus, an industrially useful effect is brought about.
【図面の簡単な説明】[Brief description of the drawings]
【図１】この発明の一実施態様を一部を断面で示す正面
図である。FIG. 1 is a front view partially showing a cross section of an embodiment of the present invention.
【図２】この発明の一実施態様を管の接合前の状態で示
す正面図である。FIG. 2 is a front view showing an embodiment of the present invention before the pipes are joined.
【図３】この発明の一実施態様を管の接合後の状態で示
す正面図である。FIG. 3 is a front view showing an embodiment of the present invention in a state after joining of tubes.
【図４】この発明の実施例１を一部を断面で示す正面図
である。FIG. 4 is a front view showing part of the first embodiment of the present invention in cross section.
【図５】この発明の実施例２を一部を断面で示す正面図
である。FIG. 5 is a front view showing part of the second embodiment of the present invention in cross section.
【図６】管継手ねじ部の端部にＯリングが設けられた状
態を示す断面図である。FIG. 6 is a cross-sectional view showing a state where an O-ring is provided at an end of a pipe joint thread part.
１、１Ａ、１Ｂ 管 ２ 管継手 ３ ねじ部 ４、４ａ、４ｂ ねじ部 ５ Ｏリング 1, 1A, 1B pipe 2 pipe joint 3 screw part 4, 4a, 4b screw part 5 O-ring
Claims (5)
右ねじ部を有する管と、一方の端に前記管の他方の端の
右ねじ部に螺合可能な右ねじ部を有し、他方の端に前記
管と同じ構造を有する次の管の一方の端の左ねじ部に螺
合可能な左ねじ部を有する短管からなる管継手とからな
り、前記管と前記管継手とが交互に連結可能であること
を特徴とする管継手構造。1. A tube having a left-hand thread at one end and a right-hand thread at the other end, and a right-hand thread at one end capable of being screwed to a right-hand thread at the other end of the tube. And a pipe joint consisting of a short pipe having a left-hand threaded portion that can be screwed into a left-hand threaded portion at one end of the next tube having the same structure as the above-mentioned tube at the other end. A pipe joint structure wherein the pipe joint and the pipe joint can be connected alternately.
パねじからなる請求項１記載の管継手構造。2. The pipe joint structure according to claim 1, wherein a thread portion of said pipe and said pipe joint comprises a tapered thread.
グが取り付けられている請求項１または２記載の管継手
構造。3. The pipe joint structure according to claim 1, wherein a seal ring is attached to an end of a threaded portion of the pipe joint.
１、２または３記載の管継手構造。4. The pipe joint structure according to claim 1, wherein a thread portion of said pipe is thickened.
ための被覆が施されている請求項１、２、３または４記
載の管継手構造。5. The pipe joint structure according to claim 1, wherein the inside of the pipe and the pipe joint is provided with a coating for corrosion protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8171391A JPH1019175A (en) | 1996-07-01 | 1996-07-01 | Pipe fitting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8171391A JPH1019175A (en) | 1996-07-01 | 1996-07-01 | Pipe fitting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1019175A true JPH1019175A (en) | 1998-01-23 |
Family
ID=15922300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8171391A Pending JPH1019175A (en) | 1996-07-01 | 1996-07-01 | Pipe fitting structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1019175A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010541207A (en) * | 2007-09-21 | 2010-12-24 | アンダレイ ソーラー インコーポレイテッド | Solar panel installation system |
| JP2011241893A (en) * | 2010-05-18 | 2011-12-01 | Disco Corp | Connection parts |
| JP2012159192A (en) * | 2011-01-28 | 2012-08-23 | General Electric Co <Ge> | Fastener |
| US8938919B2 (en) | 2007-09-21 | 2015-01-27 | Andalay Solar, Inc. | Electrical connectors for solar modules |
| JP2021092255A (en) * | 2019-12-09 | 2021-06-17 | 株式会社協和精機 | Pipe braid and manufacturing method therefor |
| CN113928506A (en) * | 2021-11-05 | 2022-01-14 | 西北工业大学 | Large-section connecting structure and tool of supercavitation high-speed navigation test prototype |
-
1996
- 1996-07-01 JP JP8171391A patent/JPH1019175A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010541207A (en) * | 2007-09-21 | 2010-12-24 | アンダレイ ソーラー インコーポレイテッド | Solar panel installation system |
| US8938919B2 (en) | 2007-09-21 | 2015-01-27 | Andalay Solar, Inc. | Electrical connectors for solar modules |
| KR101497298B1 (en) * | 2007-09-21 | 2015-03-02 | 안다레이 솔라, 인코포레이티드 | Mounting system for solar panels |
| JP2011241893A (en) * | 2010-05-18 | 2011-12-01 | Disco Corp | Connection parts |
| JP2012159192A (en) * | 2011-01-28 | 2012-08-23 | General Electric Co <Ge> | Fastener |
| JP2021092255A (en) * | 2019-12-09 | 2021-06-17 | 株式会社協和精機 | Pipe braid and manufacturing method therefor |
| CN113928506A (en) * | 2021-11-05 | 2022-01-14 | 西北工业大学 | Large-section connecting structure and tool of supercavitation high-speed navigation test prototype |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3700108B2 (en) | Threaded joint for oil well pipe | |
| JP4229775B2 (en) | Pipe fitting | |
| WO1993009375A1 (en) | High torque tool joint | |
| JPH1019175A (en) | Pipe fitting structure | |
| CN218881344U (en) | Connecting device for construction steel bar | |
| JP2002005352A (en) | Piping connection device | |
| CN106639165A (en) | Butt muff | |
| CN114810756B (en) | Connecting device of sound measurement tube | |
| JPH089501Y2 (en) | Structure of joint part of casing pipe | |
| US6435569B1 (en) | Pipe connection | |
| CN216768686U (en) | Metal corrugated hose end connecting structure capable of avoiding torsion and metal corrugated hose | |
| JPH0465954B2 (en) | ||
| WO2001075347A1 (en) | Slim type oil well pipe fitting | |
| JPS636291A (en) | Threaded joint for large diameter casing | |
| CN114215983A (en) | Avoid torsional metal corrugated hose end connection structure and metal corrugated hose | |
| JP4730079B2 (en) | A bite type pipe joint that also serves as a flare type pipe joint | |
| CN222783139U (en) | A new type of continuous pipe quick connector device | |
| JP2002228065A (en) | Structure of joint part of metal pipe | |
| CN219432658U (en) | High-strength welded pipe | |
| JP2001214437A (en) | Method for coupling steel pipes and structure of coupling | |
| JPH1019176A (en) | Pipe joint | |
| JPH0117753Y2 (en) | ||
| CN217108588U (en) | Expansion bolt fastening type steel pipe joint | |
| CN214091757U (en) | Composite auger shaft | |
| JP3309445B2 (en) | Threaded fittings for oil country tubular goods |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 8 Free format text: PAYMENT UNTIL: 20080331 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090331 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090331 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100331 Year of fee payment: 10 |
|
| LAPS | Cancellation because of no payment of annual fees |