CN103498994A - 防止海底管道腐蚀的单片式牺牲阳极 - Google Patents

防止海底管道腐蚀的单片式牺牲阳极 Download PDF

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CN103498994A
CN103498994A CN201310491480.1A CN201310491480A CN103498994A CN 103498994 A CN103498994 A CN 103498994A CN 201310491480 A CN201310491480 A CN 201310491480A CN 103498994 A CN103498994 A CN 103498994A
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sacrificial anode
submarine pipeline
contact
sacrificial
chip
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高原
杜永军
宋艳磊
桂津
陆长山
魏巍
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SHENZHEN SEA OIL ENGINEERING UNDERWATER TECHNOLOGY CO LTD
China National Offshore Oil Corp CNOOC
Offshore Oil Engineering Co Ltd
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SHENZHEN SEA OIL ENGINEERING UNDERWATER TECHNOLOGY CO LTD
China National Offshore Oil Corp CNOOC
Offshore Oil Engineering Co Ltd
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Priority to CN201310491480.1A priority Critical patent/CN103498994A/zh
Publication of CN103498994A publication Critical patent/CN103498994A/zh
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04Coatings characterised by the materials used
    • F16L58/10Coatings characterised by the materials used by rubber or plastics
    • F16L58/1054Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe
    • F16L58/1063Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe the coating being a sheet wrapped around the pipe
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00Protection of pipes or pipe fittings against corrosion or incrustation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04Coatings characterised by the materials used
    • F16L58/10Coatings characterised by the materials used by rubber or plastics
    • F16L58/1054Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe
    • F16L58/1072Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe the coating being a sprayed layer

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Prevention Of Electric Corrosion (AREA)

Abstract

一种防止海底管道腐蚀的单片式牺牲阳极,牺牲阳极的形状为一弧形,弧形的牺牲阳极安装于海底管道的上部;牺牲阳极的内部设有数个轴向加强筋和周向加强筋,且数个轴向加强筋和周向加强筋交织成网状;牺牲阳极的两端各设有数个牺牲阳极触点。本发明结构简单,不仅避免海底管道铺设过程牺牲阳极损坏及防腐层破损的风险,而且,当牺牲阳极通过滚轮时,不会增加滚轮的支撑力和所铺设海底管道的载荷,降低了铺设海底管道的风险,增加了铺设海底管道作业的安全性。

Description

防止海底管道腐蚀的单片式牺牲阳极
技术领域
本发明涉及牺牲阳极,尤其涉及一种用于防止海底管道腐蚀的单片式牺牲阳极。属于海洋石油工程领域。
背景技术
在海上石油开发工程中,需要铺设用于输送原油的海底管道。当管道铺设至海底后,海底管道会受到来自海水、海床及微生物等外部腐蚀介质以和内部输送介质的腐蚀。为了减缓或避免海底管道的腐蚀,在工程设计中,通常采用牺牲阳极的阴极保护方式。目前,公知的海底管道牺牲阳极的形状为手镯形。一般输送原油、化学药剂、泥浆和回注水的单相集输海底管道及油气水多相混输海底管道多为无混凝土配重层的钢管,而用于海底管道防腐的手镯形牺牲阳极则凸出设在海底管道的外壁上。根据工程设计,手镯形牺牲阳极虽然能保护海底管道,但是,由于铺管船S型铺设海底管道时,安装在海底管道上的手镯形牺牲阳极受到滚轮的挤压、碰撞和刮蹭容易导致手镯形牺牲阳极的破损和脱落,因此,海底管道不能得到很好的防护,增加了管道腐蚀的风险;并且,由于手镯形牺牲阳极通过作业线及托管架上滚轮时,还会增加了滚轮的支撑力和管道的局部应力,容易造成滚轮的损坏和管道过载,增加了海底管道铺设的风险。
发明内容
本发明的主要目的在于克服现有技术存在的上述缺点,而提供一种防止海底管道腐蚀的单片式牺牲阳极,其结构简单,不仅避免海底管道铺设过程牺牲阳极损坏及防腐层破损的风险,而且,当牺牲阳极通过滚轮时,不会增加滚轮的支撑力和所铺设海底管道的载荷,降低了铺设海底管道的风险,增加了铺设海底管道作业的安全性。
本发明的目的是由以下技术方案实现的:
一种防止海底管道腐蚀的单片式牺牲阳极,设有牺牲阳极,其特征在于:牺牲阳极的形状为一弧形,弧形的牺牲阳极安装于海底管道的上部;牺牲阳极的内部设有数个轴向加强筋和周向加强筋,且数个轴向加强筋和周向加强筋交织成网状;牺牲阳极的两端各设有数个牺牲阳极触点。
所述牺牲阳极的周长所对应的圆心角θ为45度至180度。
所述轴向加强筋,周向加强筋为钢筋。
所述牺牲阳极触点与海底管道接触位置的防腐层处,设有牺牲阳极安装孔,在安装孔内将牺牲阳极触点焊接至海底管道上;且牺牲阳极与海底管道连接处,设有涂敷有玛碲脂及包裹热缩带形成的防腐层。
本发明的有益效果:本发明由于采用上述技术方案,其结构简单,不仅避免海底管道铺设过程牺牲阳极损坏及防腐层破损的风险,而且,当牺牲阳极通过滚轮时,不会增加滚轮的支撑力和所铺设海底管道的载荷,降低了铺设海底管道的风险,增加了铺设海底管道作业的安全性。
下面结合附图和实施例对本发明做进一步说明。
附图说明:
图1为本发明的立体结构示意图。
图2为本发明俯视结构示意图。
图3为图2中的A—A向剖视图。
图4是图3中的B--B向剖视图。
图5是图3中的C—C向剖视图。
图6为本发明的安装示意图。
图中主要标号说明:
1.牺牲阳极,2.牺牲阳极触点,3.轴向加强筋,4.周向加强筋,5.海底管道,6.防腐层,7.安装孔。
具体实施方式
如图1所示,本发明设有牺牲阳极1,牺牲阳极1的形状为一弧形,弧形的牺牲阳极1安装于海底管道5的上部,用于海底管道5的防腐。本实施例:牺牲阳极1的内径为0.578m,与所保护的海底管道5的外径相吻合,能很好地贴合到海底管道5上;牺牲阳极1的厚度为:0.05米,长度为:2倍的内径。
如图2所示,弧形的牺牲阳极1的内部设有数个轴向加强筋3和周向加强筋4,且数个轴向加强筋3和周向加强筋4交织成网状。使牺牲阳极1具有非常强的结构强度,不易破损、断裂。其中,轴向加强筋3,周向加强筋4为钢筋,钢筋直径为0.012米;轴向加强筋3长度为1.05米;周向加强筋4长度为0.95米,
如图3所示,弧形的牺牲阳极1的周长所对应的圆心角θ为45度至180度。本实施例:牺牲阳极1的周长所对应的圆心角θ为165度。
如图3-图5所示,弧形的牺牲阳极1的两端各设有数个牺牲阳极触点2。本实施例:牺牲阳极触点2为1或2片,材质为钢材,宽度为0.03米,厚度为0.005米。牺牲阳极触点2沿轴向贯穿整个牺牲阳极1,使牺牲阳极触点2与牺牲阳极1有较大的接触面积,同时,对牺牲阳极1起到加强作用。
如图6所示,牺牲阳极触点2与海底管道5接触位置的防腐层6处,设有牺牲阳极安装孔7,在安装孔7内通过焊接的方式将牺牲阳极触点2焊接至海底管道5上;且牺牲阳极1与海底管道5连接处,设有通过涂敷玛碲脂及包裹热缩带方式形成的防腐层。
使用铺管船铺设海底管道时,按照设计位置,先清除牺牲阳极触点2与海底管道5表面接触位置处的防腐层6,并设置安装孔7。然后,将本发明安放至海底管道5的正上方,使本发明内表面与海底管道5外表面紧密接触,牺牲阳极触点2在安装孔7内与所保护的海底管道5表面紧密接触,并通过焊接方式将牺牲阳极触点2连接至海底管道5。在安装孔7内,牺牲阳极触点2的周围涂敷玛碲脂,使牺牲阳极触点2上表面与管道5表面平滑过渡,防止产生缝隙;同时,采用热缩带包裹牺牲阳极触点2及海底管道5,并形成防腐层,防止海水与海底管道5金属表面接触,进而保护海底管道5免受腐蚀。
以上所述,仅是本发明的较佳实施例而已,并非对本发明作任何形式上的限制,凡是依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰,均仍属于本发明技术方案的范围内。

Claims (4)

1.一种防止海底管道腐蚀的单片式牺牲阳极,其特征在于:牺牲阳极的形状为一弧形,弧形的牺牲阳极安装于海底管道的上部;牺牲阳极的内部设有数个轴向加强筋和周向加强筋,且数个轴向加强筋和周向加强筋交织成网状;牺牲阳极的两端各设有数个牺牲阳极触点。
2.根据权利要求1所述的防止海底管道腐蚀的单片式牺牲阳极,其特征在于:所述牺牲阳极的周长所对应的圆心角θ为45度至180度。
3.根据权利要求1所述的防止海底管道腐蚀的单片式牺牲阳极,其特征在于:所述轴向加强筋,周向加强筋为钢筋。
4.根据权利要求1所述的防止海底管道腐蚀的单片式牺牲阳极,其特征在于:所述牺牲阳极触点与海底管道接触位置的防腐层处,设有牺牲阳极安装孔,在安装孔内将牺牲阳极触点焊接至海底管道上;且牺牲阳极与海底管道连接处,设有涂敷有玛碲脂及包裹热缩带形成的防腐层。
CN201310491480.1A 2013-10-18 2013-10-18 防止海底管道腐蚀的单片式牺牲阳极 Pending CN103498994A (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103938215A (zh) * 2014-03-20 2014-07-23 中国海洋石油总公司 手镯式阳极的安装工艺
CN106764236A (zh) * 2016-12-23 2017-05-31 广东核电合营有限公司 海水金属管道腐蚀穿孔在线修补方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4190512A (en) * 1978-05-03 1980-02-26 I.S.C. Alloys Limited Sacrificial anodes
JPS60145389A (ja) * 1983-12-30 1985-07-31 Mitsui Mining & Smelting Co Ltd 管の防食方法
US4626330A (en) * 1984-01-25 1986-12-02 Dixie Electrical Manufacturing Company Torsionally installed anode and earth anchor/penetrator
WO1995029275A1 (en) * 1994-04-21 1995-11-02 N.V. Raychem S.A. Corrosion protection system
CN103174214A (zh) * 2013-03-21 2013-06-26 交通运输部天津水运工程科学研究所 用于污水深海排放的防腐型扩散器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4190512A (en) * 1978-05-03 1980-02-26 I.S.C. Alloys Limited Sacrificial anodes
JPS60145389A (ja) * 1983-12-30 1985-07-31 Mitsui Mining & Smelting Co Ltd 管の防食方法
US4626330A (en) * 1984-01-25 1986-12-02 Dixie Electrical Manufacturing Company Torsionally installed anode and earth anchor/penetrator
WO1995029275A1 (en) * 1994-04-21 1995-11-02 N.V. Raychem S.A. Corrosion protection system
CN103174214A (zh) * 2013-03-21 2013-06-26 交通运输部天津水运工程科学研究所 用于污水深海排放的防腐型扩散器

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103938215A (zh) * 2014-03-20 2014-07-23 中国海洋石油总公司 手镯式阳极的安装工艺
CN106764236A (zh) * 2016-12-23 2017-05-31 广东核电合营有限公司 海水金属管道腐蚀穿孔在线修补方法

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Application publication date: 20140108