CN1791746A - 用于锚定漂浮结构的设备 - Google Patents
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Abstract
一种用于锚定漂浮结构的设备,包括一枢轴安装在两端的系泊悬臂120a,b;650a,b,其中每个悬臂在其自由端都有一衬套124a,b;654a,b,系泊锚链或缆绳能穿过该衬套。穿过衬套的锚泊锚链被系在漂浮结构的另一端。另外,为了保持稳定,两悬臂的自由端用张紧线连接到漂浮结构。
Description
本发明涉及一种用于漂浮结构的锚泊***。更具体而言,本发明涉及一种用于漂浮结构的平稳锚泊的自动调节设备,该漂浮结构锚定在例如潮流或河流等具有可预定流向的水流中。所以本发明也可以用于锚定潮汐电站。
在US4864152号文献中描述了一种用水流(低流速)发电的漂浮发电站。这种电站设计为可以围绕固定于海床上的系缆柱自由摆动。
本申请人自己的国际专利申请PCT/NO02/00249(2002年7月8日提交申请,2003年1月23日公开,公开号WO 03/006825 A1)中披露了另一种形式的漂浮电站。这种电站包括一装有多个浮力元件的平台,所述浮力元件最好是在平台的每个角上都装有一个。这样便可确保具有最小的位移的侧向和纵向稳定性的条件得到满足。多个支撑臂从平台向每个侧向伸出,每个支撑臂支承一个发电机机体。所述支撑臂在其连接点处铰接在平台上。
该设备通过在两个方向上使用锚(未示出)和链允许标准和公知锚固。在每个方向上的一或两个锚,或者在每个方向上的一个锚锁住两个平台。这意味着这些平台能沿纵向以所需距离锚定,平台彼此之间可以接近到它们的涡轮机工作时互不妨碍的程度。当并排锚定多个单元时,横向距离也可以通过链进行校正/固定。
利用源自涡轮机的生产载荷来向上提起各个方向的锚。用绞盘将锚载荷对面的松弛链拉紧,当水流转向时,相反一侧又产生同样的情况。通过这样的方式,当水流沿两个方向流动都能得到一个固定而又稳定的位置。
在漂浮式潮汐电站的工作过程中,漂浮结构由于源自涡轮机的生产载荷而会受到相当大的力和力矩。特别是该结构的平衡力矩非常大。
按照分级公司所定的标准,锚链的长度(锚和漂浮结构之间)应该长到使锚不能把锚链从底部提起来。在一通常的漂浮电站中,其所产生的力(生产载荷、沿同一方向的初始张力和拖曳力)的总和相当于在6海里水流中获得的1.5MW功率所产生的200吨拉力。
为了抵消这些力矩,以及确保漂浮结构固定在所需要的位置,必须要使用所述电站的起锚机。但是,实践中发现很难抵消这些力矩和力矩所导致的位移。现有的电站都存在这个问题。
US5 061 131号文献中公开了一种用于漂浮平台的“自动扶正”系泊***。该文献公开了一种采用锚链将相应锚固定在海床上的锚固平台。每个锚链都配备有一通常置于海床上的重物。当其受力(例如水流,风)作用时,平台会发生位移。此时顺流侧锚链上的重物会向底部移动。根据该文献所描述的,当所述重物在底部时,导致平台的回复力快速增大。
所以需要一种系泊***,所述系泊***不导致漂浮平台很大的纵倾度(或俯仰);要能确保只有少量漂移的稳定定位,要减少锚和漂浮结构之间的距离。
本发明解决了上述的问题,因为提出一种用抑制***、系泊悬臂(mooringboom)和锚链上的拉伸载荷抵消力矩(例如,由源自涡轮机的生产载荷所产生的力矩)的系泊***。
因此,提供了一种用于锚定漂浮结构的设备,所述漂浮结构包括第一端和第二端,其中该设备的特征在于,在所述漂浮结构的每一端都设置有至少一根向下伸出的刚性系泊悬臂;连接到所述漂浮结构第一端的系泊悬臂在其自由端上包括用于引导一细长系泊元件的装置,该细长系泊元件可在其一端处连接到漂浮结构的第二端上;连接到所述漂浮结构第二端的系泊悬臂在其自由端上包括用于引导一细长系泊元件的装置,该细长系泊元件可在其一端处连接到漂浮结构的第一端上。
本发明的优选实施例由从属权利要求2-11予以披露。
下面参考附图对本发明的一个优选实施例作详细说明,其中相同的部件用相同的附图标记表示。
图1是本发明所述设备的一个实施例的透视图,该设备用于一个用水流发电的发电站中;
图2是从一个端部看的图1中所述设备;
图3是从一个侧面看的图1中所述设备;
图4是从上面看的图1中所述设备的俯视图;
图5是系泊悬臂的实施例透视图;
图6是图5中B区域的放大视图,示出了悬臂自由端的衬套;
图7是图5中A区域的放大视图,示出了该结构的枢轴连接;
图8a是本发明设备的侧面示意图,其漂浮在静止水体中;
图8b示出了图8a中的设备,但其处于水流自图示左侧向右流动的位置中;
图9a是本发明设备的俯视示意图,没有稳定缆绳;
图9b是图9a中设备的示意图,有稳定缆绳;
图10a是装有可伸缩系泊悬臂的本发明设备的示意图,该设备漂浮在静止的水体中;
图10b示出了图10a中的设备,处于自图示左侧向右流动的水流位置中;
图11a是带有停止装置的本发明设备示意图,从一侧示出在静止水体中的所述设备;和
图11b示出了图11a中设备,其处于水流自图示左侧向右流动导致的位置中。
本发明所述设备最基本的组成是一漂浮结构100,最好是如图8a所示的那种带有第一端和第二端的细长结构。一系泊悬臂120a,b固定在所述漂浮结构的每一端。
所述系泊悬臂最好是绕各自的转动中心122a,b可转动地连接到所述结构上。每一个悬臂在其自由端上都有将缆绳、锚链等穿过其中的衬套124a,b。这些缆绳、锚链等(此后称为系泊元件)可被锚定到如海床(未示出)上。每个衬套124a,b被设计成能引导各自对应的系泊元件穿过其中,以连接到所述结构的对置侧。从图中可以看到,系泊元件110a中的一个穿过套筒124a,到达该结构的与连接系泊悬臂120a的端部相对的另一端部。系泊元件124b的情况也类似。如前所述,每个系泊悬臂最好是枢轴连接到漂浮结构上,但是所述系泊悬臂也可包括取代枢轴连接到所述结构上挤压和拉伸所述系泊的伸缩件(包括弹簧和阻尼器)。图10a和10b中示出了一个例子。
如前所述,该电站或结构最好是两端都有枢轴系泊悬臂,其中每一个悬臂在其自由端都有使锚链可按如图所示的方式穿过其中的套筒或衬套。穿过一个衬套的锚链或缆绳被紧紧系在所述电站的相对端。另外,为了保持稳定,最好是用张紧绳126将两悬臂的自由端连接到所述电站。图8b,10b,11b示出了安装在从图示左侧流向右侧的水流中的本发明的不同实施例。在所述结构的两端沿水流方向延伸出一主锚链(细长的系泊元件)。如图所示,这些系泊元件从“尾端”(aft end)伸出,沿结构下的中线向前延伸,穿过前述的固定在悬臂自由端的套筒124a,b。在“载荷方向”,所述悬臂将和所述结构保持接近45°的角度。
系泊悬臂能吸收压力载荷,其最好是铰接在所述结构的一端,并配备有从位于所述结构每一侧的下端上的衬套或套筒中穿过的张紧绳。系泊悬臂的长度和重量要能使产生和阻止纵倾的力矩在两个纵倾方向上一样大。这样,就可获得一种在所有作用于该结构的力矩中自调节的“纵倾平衡”(trim balance)。
系泊悬臂能绕其转动中心122a,b自由转动,其最好还带有拉紧侧撑126,能起到类似于锚链上“地锚”(张紧非垂直链的重物)的作用。这在主牵引侧的对侧特别有用,并确保了最佳的稳定定位。当水流转向时,所述系泊悬臂的作用将自动转换。也可以假设这样一种方法,一旦精确地决定在哪里将目标定位,那么该方法在于确定实际锚放置处的深度和底部地形。用锚装卸器将锚抛出,锚链就沿目标所在的方位伸展出去。在锚链放尽之前,锚被提起来,再放出一在所述锚链末端带有浮力元件的缆绳(用于稍后的提升)。对2号锚重复同样的程序。在所述电站即将完工的时候,把浮力元件拖上来,使之穿过悬臂120a,b上的套筒,并将其引导至所述结构。锚链首先被拉到液压止链器(hydraulicchain stpoper)130a,b上,然后用所述液压起重设备收链。最后,当水流足够大的时候可以用电站涡轮机提起并系紧锚。
图1示出本发明的一个实施例,其中支撑结构620配备有控制室600,以及与利用低速水流发电的发电机752相连接的支撑臂615。支撑臂615枢轴连接到结构620上,就像前述本申请人的PCT/NO/02/00239号申请中所描述的那样(参考前面的说明)。如图1所示,结构620设置有一对漂浮元件610,最好是位于结构的第一端和第二端。图1还示出了连接点630a,b以及在拉入和校正系泊元件中所需的水压校正装置。如前所述,系泊悬臂650a,b从所述结构开如向斜下方延伸,在图1所示的实施例中,悬臂在各自的旋转点652a,b处枢轴连接到所述结构上。所述系泊悬臂的每一个自由端都配置有衬套或套筒654a,b,所述衬套或套筒最好也枢轴连接在悬臂上。如图1所示,通过从悬臂自由端向上达到各个漂浮元件610的张紧绳660可以获得稳定效果。
和图1所示结构相同但是从结构一端看去的图2示出了张紧绳660实际上是锚链。
图3也示出了连接点630a,b,和从所述结构上侧穿过的系泊元件617a,b,该图中所示的系泊元件围绕着所述结构的端部。图中还示出了安装在支撑结构620上并使支撑结构不接触水面的漂浮元件610,但是本发明并不局限于这样的构造。应当指出,图1-4所示出的是安装在水体中的本发明实施例,但都是在静止水体中,也就是所述结构不沿着任何方向的水流移动。
图5示出了系泊悬臂650a,b的实施例,并具体示出了悬臂两端的细节。
图6示出了衬套654的实施例,并示出了枢轴连接在悬臂上。
图7是悬臂如何连接到其位于所述结构上的转动中心652a,b的实例。
图8a至图11b示出了本发明设备的一种基本形式。如前所述,图8a示出了一种连接有两条系泊悬臂120a,b的基本漂浮结构100,每条悬臂都能引导系泊元件(就是锚链或缆绳)。图8a示出了安装在静止水体中的本发明设备,其中的系泊元件110a,b从伸出到每一侧,并假定被锚定在例如锚置于海床上的锚上。图8b示出了和图8a中相同的设备,但其处于水流自左向右流动的位置中。这里,可以看见所述悬臂120b因为系泊元件110b的张紧有一个很小的向上位移,同时悬臂120a受到向下的力。两条悬臂120a,b绕着各自的转动中心122a,b转动。
图9a示出了悬臂120a,b的实施例。一般情况下,悬臂是大尺寸的刚性元件,但是在实践中(就像前面的图中所示的那样),悬臂120a,b是如图9b所示的那样,此时悬臂最好如图那样带有张紧绳或张紧件126。
图10a和10b示出了本发明设备的一种变化,其中悬臂120’a,b是可伸缩的。本领域技术人员应当理解这种悬臂可以是刚性固定在所述结构100上,也可以是前述那样的枢轴固定。类似于前面的附图,图10b示出了和图10a中相同的设备,但其处于水流自左向右流动的位置中。
为了调节力臂,所述系泊元件110a,b可在其各自对应的悬臂120a,b外侧装有限位器(stop)112a,b。这些限位器可以和对应悬臂的自由端啮合,如图11b所示,由于水流自图中左侧向右流动因而造成该结构100被迫向右,于是限位器112a就和衬套124a啮合,这样就限制了整个电站的位移。这种位于系泊缆绳给定点(也就是限定悬臂相对于结构的角度)上的限位器非常有用。它可以增加防止纵倾的力矩。实践中,使这种锚链紧系到平台(就是所说的平台对置端)并穿过延伸到平台前方的悬臂末端的套筒的方式,意味着所述结构(电站)将作为一个整体在负荷方向上位于该点之后。原因就是通过两条接近所述表面的锚链可以在侧向位置上保持悬臂上的同一个下部点(就是在系泊元件能在其中滑动的衬套处),所述两个铰链与悬臂的上端铰接在同一个点上。例如,如果所述系泊元件中的一个断了,那整个电站将“旋转起来”(spinaround)。另一个积极因素是,当水流变大时,悬臂上所承受的水流压力也会增加,这样悬臂被迫使向下,并抵消“连接点”变低带来的纵倾。悬臂的长度之间的在悬臂中填充泥沙以增加其重量的关系最好是由实际测试调节的一种关系。因为不能确定每一个涡轮机的生产载荷是多大,所以理想的长度、重量、倾角等参数是很难被预先精确地计算出来的。
虽然本发明主要是参考一种利用低速水流来发电的发电站进行描述的,但是应当指出所述系泊设备适用于任何一种由于自身的设计而受到很大纵倾力矩的漂浮结构。所述的系泊设备既不局限于说明书中的漂浮结构610,也不局限于矩形或主要(primarily)细长结构。
Claims (11)
1.一种用于锚定漂浮结构(100;620)的设备,包括第一端和第二端,其特征在于:
-在所述结构的每一端都设置有至少一个向下伸出的刚性系泊悬臂(120a,b;120’a,b;650a,b);
-连接到所述结构第一端的所述系泊悬臂在其自由端上包括用于引导细长系泊元件(110a,617a)的装置(124a,654a),该系泊元件可在其一端处连接到所述结构的第二端;以及
-连接到所述结构第二端的所述系泊悬臂在其自由端上包括用于引导细长系泊元件(110b,617b)的装置(124b,654b),该系泊元件可在其一端处连接到所述结构的第一端。
2.如权利要求1所述的设备,其特征在于,每一个系泊悬臂(120a,b;120’a,b;650a,b)都枢轴(122a,b;652a,b)连接到所述漂浮结构上。
3.如权利要求1所述的设备,其特征在于,每一个系泊悬臂(120a,b;120’a,b;650a,b)都包括压缩和伸长所述悬臂的伸缩元件。
4.如权利要求1所述的设备,其特征在于,第一和第二细长系泊元件(110a,b;617a,b)连接到各自对应的在所述结构第二端和第一端的连接点(130b,a;630b,a)上。
5.如权利要求1所述的设备,其特征在于,每一个用于引导细长系泊元件(617a,b)的装置(654a,b)都是一个枢轴连接到相应的所述系泊悬臂上的套筒。
6.如权利要求1所述的设备,其特征在于,所述的细长系泊元件(110a,b;617a,b)可滑动地设置为与所述导向装置(124a,b;654a,b)结合。
7.如权利要求1所述的设备,其特征在于,所述结构(620)由多个自所述结构向外伸出、最好位于所述结构第一端和第二端的成对布置的漂浮元件(610)支撑。
8.如权利要求1所述的设备,其特征在于,张紧绳(126;660)成对地将悬臂的自由端分别连接到所述结构的第一端和第二端。
9.如权利要求1,7和8所述的设备,其特征在于,所述的张紧绳对将悬臂的自由端连接到相应的所述漂浮元件(610)上。
10.如前述任一权利要求所述的设备,其特征在于,所述设备还包括多个支撑臂(615),该支撑臂的一端枢轴连接到所述结构上,该支撑臂的另一端连接到相应的利用水流发电的发电机(750,752)上。
11.如前述任一权利要求所述的设备,其特征在于,每一个系泊元件上都设置有位于相应导向装置(124a,b;654a,b)和所述电站下面的相应的锚定点之间的限位装置(112a,b)。
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CN102667139B (zh) * | 2009-10-05 | 2016-06-29 | 蓝水能源服务有限公司 | 从海流产生能量的浮动组件 |
CN104010937A (zh) * | 2011-10-26 | 2014-08-27 | 法国Nov-Blm公司 | 用于将浮式平台锚固到地面的设备 |
CN104010937B (zh) * | 2011-10-26 | 2016-11-02 | 法国Nov-Blm公司 | 用于将浮式平台锚固到地面的设备 |
CN113479290A (zh) * | 2021-06-22 | 2021-10-08 | 海南热带海洋学院 | 一种海洋定位浮标 |
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CN100497937C (zh) | 2009-06-10 |
ATE391234T1 (de) | 2008-04-15 |
CA2525802C (en) | 2012-08-07 |
NO320252B1 (no) | 2005-11-14 |
US7438504B2 (en) | 2008-10-21 |
DE602004012859D1 (de) | 2008-05-15 |
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JP2007505007A (ja) | 2007-03-08 |
KR20060017793A (ko) | 2006-02-27 |
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