JP2009150512A - Method of preventing seizure at connecting point of pair of metal members and connection structure of pair of metal members - Google Patents

Method of preventing seizure at connecting point of pair of metal members and connection structure of pair of metal members Download PDF

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JP2009150512A
JP2009150512A JP2007330535A JP2007330535A JP2009150512A JP 2009150512 A JP2009150512 A JP 2009150512A JP 2007330535 A JP2007330535 A JP 2007330535A JP 2007330535 A JP2007330535 A JP 2007330535A JP 2009150512 A JP2009150512 A JP 2009150512A
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Prior art keywords
pair
metal
metal members
joint
seizure
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JP2007330535A
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Inventor
Yukihiko Matsumura
幸彦 松村
Yoshihisa Shimizu
嘉久 清水
Yukimasa Yamamura
幸政 山村
Terushi Nakamura
昭史 中村
Hidetsugu Kiyonaga
英嗣 清永
Tomoaki Minowa
智朗 美濃輪
Yoji Noda
洋二 野田
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Chugoku Electric Power Co Inc
Hiroshima University NUC
National Institute of Advanced Industrial Science and Technology AIST
Toyo Koatsu Co Ltd
Original Assignee
Chugoku Electric Power Co Inc
Hiroshima University NUC
National Institute of Advanced Industrial Science and Technology AIST
Toyo Koatsu Co Ltd
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Application filed by Chugoku Electric Power Co Inc, Hiroshima University NUC, National Institute of Advanced Industrial Science and Technology AIST, Toyo Koatsu Co Ltd filed Critical Chugoku Electric Power Co Inc
Priority to JP2007330535A priority Critical patent/JP2009150512A/en
Publication of JP2009150512A publication Critical patent/JP2009150512A/en
Pending legal-status Critical Current

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  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To prevent seizure at a connecting point of pipes exposed to high temperatures. <P>SOLUTION: In a connection structure 1 connecting one of the piping 10 having at an end a male joint 11 having a screw thread 12 on a surface and the other piping 20 having at an end a female joint 21 having a screw thread 22 on an inner surface, at least either of the screw threads 12, 22 of the male joint 11 and the female joint part 21 is applied with plating treatment 13. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、各種の高温装置における配管の継手部などの高温に曝される一対の金属製の部材の接合部における焼付き防止方法及び接合構造に関する。   The present invention relates to a seizure prevention method and a joint structure in a joint portion of a pair of metal members exposed to a high temperature such as a joint portion of a pipe in various high temperature apparatuses.

従来より、各種の高温装置における配管等の継手部は、強度や耐久性，耐腐食性が求められるため、耐熱合金，耐食合金等により構成されている。このような配管の継手部としては、一方の配管の接合端部に形成された外周面に螺条が形成されてなる雄継手と、他方の配管の接合端部に形成された内周面に螺条が形成された雌継手とを螺合させることにより継手する構造が用いられている。   Conventionally, joints such as pipes in various high-temperature apparatuses are required to have strength, durability, and corrosion resistance, and thus are made of a heat-resistant alloy, a corrosion-resistant alloy, or the like. As a joint part of such a pipe, a male joint in which a thread is formed on the outer peripheral surface formed at the joint end of one pipe, and an inner peripheral surface formed at the joint end of the other pipe A structure in which a joint is formed by screwing a female joint formed with a thread is used.

しかし、継手部の雄継手と雌継手が同種の金属で構成されると、高温になったときに両者が接触する接続部において焼付きを起し、癒着してしまうという問題があった。   However, when the male joint and the female joint of the joint portion are made of the same kind of metal, there is a problem in that seizure occurs at the connection portion where both come into contact with each other when the temperature becomes high, and adhesion occurs.

本発明は、上記の問題に鑑みなされたものであり、その目的は、高温に曝される一対の金属製の部材の接続部において焼付きを防止することである。   This invention is made | formed in view of said problem, The objective is to prevent seizure in the connection part of a pair of metal member exposed to high temperature.

本発明の一対の金属製部材の接続部における焼付き防止方法は、高温に曝される一対の金属製の部材の接続部における焼付き防止方法であって、前記金属製の部材のうち少なくとも何れか一方の部材の、他方の部材と接触する部分に前記金属は異種の金属のめっき加工を施すことを特徴とする。   The method of preventing seizure in the connection part of the pair of metal members according to the present invention is a method of preventing seizure in the connection part of the pair of metal members exposed to high temperature, and at least any of the metal members The metal is plated with a different kind of metal at a portion of the one member that contacts the other member.

上記の焼付き防止方法において、前前記一対の金属性の部材は、外周面に螺条が形成されてなる雄継手を接続側端部に有する一方の配管と、内周面に螺条が形成された雌継手を接続側端部に有する他方の配管であって、前記雄継手及び雌継手の少なくとも何れか一方の螺条に前記めっき加工を施してもよい。
また、前記異種の金属はクロム、金、ニッケル、銀又はこれらの金属を含有する合金であってもよい。 In the above-described seizure prevention method, the pair of metallic members is formed with one pipe having a male joint having a thread formed on the outer peripheral surface at the connection side end and a thread formed on the inner peripheral surface. The other pipe having the formed female joint at the connection side end, and the plating may be applied to at least one of the male joint and the female joint.
The dissimilar metal may be chromium, gold, nickel, silver, or an alloy containing these metals.

また、本発明の一対の金属製部材の接続構造は、高温に曝される一対の金属製の部材を接続する接続構造であって、前記金属製の部材のうち少なくとも何れか一方の部材の、他方の部材と接触する部分に前記金属とは異種の金属のめっき加工が施されていることを特徴とする。   Further, the connection structure of the pair of metal members of the present invention is a connection structure for connecting a pair of metal members exposed to a high temperature, and the connection structure of at least one of the metal members, The portion that contacts the other member is plated with a metal different from the metal.

本発明によれば、一方の金属製部材の他方の金属製部材と接触する部分に異種金属のめっき加工を施すことにより、同種の金属同士が接触することがなくなり、焼付きや癒着を防止することができる。   According to the present invention, by subjecting one metal member to contact with the other metal member, the dissimilar metal is plated so that the same kind of metal does not contact each other, and seizure and adhesion are prevented. be able to.

以下、本発明の継手構造の一実施形態について図面を参照しながら詳細に説明する。
図１は、本実施形態の継手構造１を示し、（Ａ）は継手構造１により接続する前の状態を、（Ｂ）は継手構造１により接続した状態を示す断面図である。本実施形態の継手構造１は、高温高圧の流体の流れる一対の配管１０、２０を接続するための構造である。同図に示すように、一方の配管１０は、接続側の端部に外周面に螺条１２が形成されてなる雄側継手部１１を備える。また、他方の配管２０は、接続側端部に径が他の部分に比べて大きく形成され、雄側継手部１１の螺条１２と螺合するような螺条２２が内周面に形成された雌側継手部２１を備える。 Hereinafter, an embodiment of a joint structure of the present invention will be described in detail with reference to the drawings.
1A and 1B show a joint structure 1 according to the present embodiment, in which FIG. 1A is a cross-sectional view showing a state before connection by the joint structure 1 and FIG. The joint structure 1 of this embodiment is a structure for connecting a pair of pipes 10 and 20 through which a high-temperature and high-pressure fluid flows. As shown in the figure, one pipe 10 includes a male joint portion 11 having a thread 12 formed on the outer peripheral surface at an end portion on the connection side. Further, the other pipe 20 is formed with a larger diameter at the connection side end portion than the other portions, and a thread 22 that is screwed with the thread 12 of the male joint part 11 is formed on the inner peripheral surface. The female side joint part 21 is provided.

これら一対の配管１０、２０は、高温高圧の流体に曝されても耐えうるように十分な強度及び耐久性を持たせるように、耐熱合金，耐食合金等からなるものが用いられている。なお、耐熱合金，耐食合金としてはハステロイ（登録商標）等が代表的であり、ハステロイは、モリブデン、クロム、鉄などを含有する耐熱・耐食性を有するニッケル基合金である。これら一対の配管１０、２０は、図１（Ｂ）に示すように、一方の配管１０の雄側継手部１１を、他方の配管２０の雌側継手部２１と螺合させることにより、接続することができる。   The pair of pipes 10 and 20 are made of a heat-resistant alloy, a corrosion-resistant alloy, or the like so as to have sufficient strength and durability to withstand even when exposed to a high-temperature and high-pressure fluid. As a typical heat-resistant alloy and corrosion-resistant alloy, Hastelloy (registered trademark) is typical, and Hastelloy is a nickel-based alloy having heat resistance and corrosion resistance containing molybdenum, chromium, iron and the like. As shown in FIG. 1B, the pair of pipes 10 and 20 are connected by screwing the male side joint part 11 of one pipe 10 with the female side joint part 21 of the other pipe 20. be able to.

ここで、従来技術の欄に記載したように、同種の金属性の雄側継手部と雌側継手部とを螺合させた継手構造では、高温に曝されると焼付きをおこし、雄側継手部と雌側継手部とが癒着してしまう。これに対して、本願発明者は、ニッケルやクロムは鋼に対して焼付きを起こしにくいという点に着目し、雄側継手部の螺条の表面にニッケルやクロムによるめっきを施すこととした。なお、めっきの厚さとしては２０μｍ程度とすればよい。   Here, as described in the section of the prior art, in the joint structure in which the same type of metallic male joint part and female joint part are screwed together, seizure occurs when exposed to high temperature, and the male side A joint part and a female side joint part will adhere. On the other hand, the inventor of the present application pays attention to the point that nickel and chromium hardly cause seizure to steel, and decided to perform plating with nickel or chromium on the surface of the thread of the male joint portion. The plating thickness may be about 20 μm.

本実施形態の継手構造１によれば、雄側継手部１１の螺条１２の表面にめっき１３を施すことにより、接合部において同種金属が接触することがなくなるため、焼付きや癒着を防止することができる。   According to the joint structure 1 of the present embodiment, the plating 13 is applied to the surface of the thread 12 of the male side joint portion 11, so that the same kind of metal does not come into contact with the joint portion, thereby preventing seizure and adhesion. be able to.

なお、本実施形態では、雄側継手部１１に異種金属のめっきを施すこととしたが、これに限らず、雌側継手部２１の内周面に異種金属のめっきを施してもよく、要するに、雄側継手部１１及び雌側継手部２１の少なくともいずれか一方にめっきが施されていればよい。   In this embodiment, the male side joint portion 11 is plated with a different metal. However, the present invention is not limited to this, and the inner peripheral surface of the female side joint portion 21 may be plated with a different metal. It is sufficient that at least one of the male side joint part 11 and the female side joint part 21 is plated.

また、本実施形態では、ニッケルやクロムのめっきを施すこととしたが、これに限らず、金、銀などの金属や、これらの金属の合金によりめっきしてもよく、要するに、雄側継手部１１及び雌側継手部２１において接触する部分の金属が互いに異種金属であればよい。   In the present embodiment, nickel or chromium is plated. However, the present invention is not limited thereto, and plating may be performed using a metal such as gold or silver, or an alloy of these metals. 11 and the female joint portion 21 may be made of different metals if they are in contact with each other.

また、本実施形態では、一方の配管１０の端部に形成された雄側継手部１１と、他方の配管２０の端部に形成された雌側継手部２１とを螺合させることによりこれらの配管１０、２０を接続する場合について説明したが、これに限らず、他の継手方法により一対の配管１０、２０を接続する場合であっても、本発明を適用することができる。このような場合には、何れか一方の配管１０の他方の配管２０と接触する部分に異種金属のめっき加工を施せばよい。   In the present embodiment, the male side joint portion 11 formed at the end portion of the one pipe 10 and the female side joint portion 21 formed at the end portion of the other pipe 20 are screwed together. Although the case where the pipes 10 and 20 are connected has been described, the present invention is not limited thereto, and the present invention can be applied even when the pair of pipes 10 and 20 are connected by other joint methods. In such a case, a different metal plating process may be applied to a portion of one of the pipes 10 that contacts the other pipe 20.

さらに、本実施形態では、一対の配管１０、２０を接続する場合に本発明を適用した場合について説明したが、これに限らず、高温に曝され、焼付きによる癒着の恐れがある同種の金属からなる部材を接続する場合であれば適用することができる。   Furthermore, in this embodiment, although the case where this invention was applied when connecting a pair of piping 10 and 20 was demonstrated, it is not restricted to this, The same kind of metal which is exposed to high temperature and there exists a possibility of adhesion by seizure The present invention can be applied to the case of connecting members made of.

本実施形態の継手構造を示し、（Ａ）は継手構造により接続する前の状態を、（Ｂ）は継手構造により接続した状態を示す断面図である。The joint structure of this embodiment is shown, (A) is a sectional view showing a state before being connected by the joint structure, and (B) is a state showing being connected by the joint structure.

符号の説明Explanation of symbols

１ 継手構造
１０ 一方の配管
１１ 雄側継手部
１２ 螺条
１３ めっき
２０ 他方の配管
２１ 雌側継手部
２２ 螺条 DESCRIPTION OF SYMBOLS 1 Joint structure 10 One piping 11 Male side joint part 12 Screw 13 Plating 20 Other piping 21 Female side joint 22 Screw

Claims (4)

高温に曝される一対の金属製の部材の接続部における焼付き防止方法であって、
前記金属製の部材のうち少なくとも何れか一方の部材の、他方の部材と接触する部分に前記金属は異種の金属のめっき加工を施すことを特徴とする一対の金属製部材の接続部における焼付き防止方法。 A method for preventing seizure in a connection portion of a pair of metal members exposed to high temperature,
A seizure at a connecting portion of a pair of metal members, wherein the metal is plated with a different kind of metal on a portion of at least one of the metal members that contacts the other member. Prevention method. 前記一対の金属性の部材は、外周面に螺条が形成されてなる雄継手を接続側端部に有する一方の配管と、内周面に螺条が形成された雌継手を接続側端部に有する他方の配管であって、
前記雄継手及び雌継手の少なくとも何れか一方の螺条に前記めっき加工を施すことを特徴とする請求項１記載の一対の金属製部材の接続部における焼付き防止方法。 The pair of metallic members includes one pipe having a male joint having a thread formed on an outer peripheral surface at a connection side end and a female joint having a thread formed on an inner peripheral surface. The other piping of
The method for preventing seizure at a connection portion of a pair of metal members according to claim 1, wherein the plating is performed on at least one of the male joint and the female joint. 前記異種の金属はクロム、金、ニッケル、銀又はこれらの金属を含有する合金であることを特徴とする請求項１又は２記載の一対の金属製部材の接続部における焼付き防止方法。   3. The method of preventing seizure at a connecting portion of a pair of metal members according to claim 1, wherein the different kind of metal is chromium, gold, nickel, silver or an alloy containing these metals. 高温に曝される一対の金属製の部材を接続する接続構造であって、
前記金属製の部材のうち少なくとも何れか一方の部材の、他方の部材と接触する部分に前記金属とは異種の金属のめっき加工が施されていることを特徴とする一対の金属製部材の接続構造。 A connection structure for connecting a pair of metal members exposed to high temperature,
A connection of a pair of metal members, wherein a part of at least one of the metal members that contacts the other member is plated with a metal different from the metal Construction.
JP2007330535A 2007-12-21 2007-12-21 Method of preventing seizure at connecting point of pair of metal members and connection structure of pair of metal members Pending JP2009150512A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011106627A (en) * 2009-11-19 2011-06-02 Sumitomo Metal Ind Ltd Screw joint for oil well pipe
JPWO2020111216A1 (en) * 2018-11-30 2021-09-30 サントリーホールディングス株式会社 A method for suppressing foaming of a liquid oral composition containing a collagen peptide and a liquid oral composition

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6179797A (en) * 1984-09-27 1986-04-23 Sumitomo Metal Ind Ltd Oil well pipe joint having excellent resistance to galling and corrosion
JP2002130552A (en) * 2000-10-24 2002-05-09 Sumitomo Metal Ind Ltd Oil well pipe screw joint with excellency in environmental conservation

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6179797A (en) * 1984-09-27 1986-04-23 Sumitomo Metal Ind Ltd Oil well pipe joint having excellent resistance to galling and corrosion
JP2002130552A (en) * 2000-10-24 2002-05-09 Sumitomo Metal Ind Ltd Oil well pipe screw joint with excellency in environmental conservation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011106627A (en) * 2009-11-19 2011-06-02 Sumitomo Metal Ind Ltd Screw joint for oil well pipe
JPWO2020111216A1 (en) * 2018-11-30 2021-09-30 サントリーホールディングス株式会社 A method for suppressing foaming of a liquid oral composition containing a collagen peptide and a liquid oral composition

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