CN210139943U - Underwater tensioner - Google Patents
Underwater tensioner Download PDFInfo
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- CN210139943U CN210139943U CN201921142316.9U CN201921142316U CN210139943U CN 210139943 U CN210139943 U CN 210139943U CN 201921142316 U CN201921142316 U CN 201921142316U CN 210139943 U CN210139943 U CN 210139943U
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Abstract
The utility model provides an underwater tensioner, include: the chain stopping device comprises an external frame, a chain stopping device, a belt groove pulley, a lower end anchor chain and an upper end anchor chain, wherein one end of the external frame is provided with a first eyelet and the belt groove pulley, the other end of the external frame is provided with a chain guide hole and the chain stopping device, the lower end anchor chain is connected to the first eyelet, and the upper end anchor chain passes through the chain guide hole and is guided by the belt groove pulley to turn; the chain stopping device working underwater loosens and locks, can control the upper end anchor chain to move and stand in the chain guide hole and the pulley with the groove, adopts the installation ship to assist the underwater tensioner to realize the tensioning of the mooring line, does not need to install equipment such as an anchor machine, a lifter and the like on the deck of the floating production storage and offloading oil ship, has low basic construction cost, does not need to arrange an anchor chain cabin, saves the deck space, does not need personnel to operate tensioning equipment on the floating production storage and offloading oil ship, and saves the labor cost.
Description
Technical Field
The utility model relates to a floating structure multiple spot mooring system tensioning field particularly, especially relates to an underwater tensioner.
Background
With the increasing development speed of ocean oil and gas resources, a floating production system represented by a Floating Production Storage and Offloading (FPSO) is favored by the market, and a mooring system is one of key facilities of the FPSO, and the mooring system is used for effectively limiting the motion response of a floating platform, so that the platform can meet engineering requirements in a proper water area, such as design requirements of a riser and guarantee of working conditions.
Most ship-type FPSOs employ a multi-point mooring system, the conventional mooring system tensioning method is to use equipment such as an anchor machine, a winch and a lifter which are installed on the deck of the FPSO for tensioning, a typical set of tensioning devices comprises a fixed anchor machine, a chain stopper, a chain guide, a hydraulic power unit and a chain locker, the set of devices is expensive to purchase and is generally used only during installation and is not used after the installation, besides the waste of resources, if the equipment is not maintained frequently, the equipment is corroded, the next use can cause jamming problems, the weight and the deck space are usually limited, so that the set of equipment occupies too much deck space, the weight on the deck also influences the stability of the ship, and the tensioning equipment is required to be operated by personnel on the ship each time of re-tensioning, consuming manpower and material resources.
Disclosure of Invention
According to the technical problems that the conventional mooring system tensioning equipment is expensive, occupies too much deck space, needs frequent maintenance and the like, the underwater tensioner is provided. The utility model discloses utilize underwater tensioner to the tensioning of mooring rope under water, replace overspeed device tensioner such as anchor machine, the raiser that traditional multiple spot mooring system adopted, vacate more deck spaces, saved expensive purchase expenses such as anchor machine, do not need too many maintenance.
The utility model discloses a technical means as follows:
an underwater tensioner comprising: the chain stopping device comprises an external frame, a chain stopping device, a belt groove pulley, a lower end anchor chain and an upper end anchor chain, wherein one end of the external frame is provided with a first eyelet and the belt groove pulley, the other end of the external frame is provided with a chain guide hole and the chain stopping device, the lower end anchor chain is connected to the first eyelet, and the upper end anchor chain passes through the chain guide hole and is guided by the belt groove pulley to turn; the chain stopping device working under water is loosened and locked, and the movement and the rest of the upper end anchor chain in the chain guide hole and the grooved pulley can be controlled.
Furthermore, the chain stopping device comprises a chain stopping arm, a spring, an operating arm, a first fixing pin and a second fixing pin, wherein the first fixing pin and the second fixing pin are arranged on the outer frame on the side of the chain guide hole at intervals, and a gap formed between the first fixing pin and the second fixing pin is used for the upper-end anchor chain to pass through; the chain stopping arm is arranged on the external frame through a pin shaft, and a spring which is twisted anticlockwise is arranged on the pin shaft, so that the chain stopping arm is normally abutted against the first fixing pin and the second fixing pin, and the upper end anchor chain is locked; and an operating arm for controlling the rotation on the chain stopping arm is arranged on the pin shaft, so that after the operating arm rotates, the chain stopping arm is far away from the first fixing pin and the second fixing pin, and the upper end anchor chain is loosened.
Further, the bottom end of the lower anchor chain is connected with a polyester cable through a chain rope connector, and an anchor is installed at the bottom of the polyester cable.
Furthermore, in the installation state, the upper end of the upper end anchor chain is connected to a second eyelet of the floating production oil storage and discharge ship, the lower end of the upper end anchor chain is connected to a winch of the installation ship, and an underwater robot for observation and operation is placed on the installation ship; under the working state, the upper end of the upper end anchor chain is connected to a second eyelet of the floating production storage and offloading oil tanker, and the lower end of the upper end anchor chain is connected to a second buoyancy ball.
Further, the grooved pulley is mounted on the outer frame by a pulley shaft.
Further, the grooved pulley is a five grooved pulley.
Further, the anchor is a suction anchor, a drag through anchor, a normal bearing anchor or a dynamic through anchor.
Further, the lower anchor chain and the polyester cable form a lower mooring cable.
Compared with the prior art, the utility model has the advantages of it is following:
1. the installation ship is adopted to assist the underwater tensioner to realize the tensioning of the mooring line, and equipment such as an anchor machine, a lifter and the like do not need to be installed on a deck of the floating production storage and offloading oil ship, so that the basic construction cost is low.
2. The chain locker is not needed, the deck space is saved, personnel are not needed to operate the tensioning equipment on the floating production storage and offloading ship, and the labor cost is saved.
3. The floating production storage and offloading ship reduces the tensioning auxiliary equipment, reduces the load and increases the effective load.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of the underwater tensioner of the present invention.
Fig. 2 is a pre-arrangement diagram of an anchor for an underwater tensioner of the present invention.
Fig. 3 is a schematic view of the installation of the underwater tensioner of the present invention.
Fig. 4 is a schematic diagram of the normal operation of the underwater tensioner of the present invention.
Wherein: 1. the device comprises an outer frame, 2, a lower end anchor chain, 3, a first eyelet, 4, a pulley shaft, 5, a grooved pulley, 6, a chain stopping device, 7, a chain stopping arm, 8, an operation arm, 9, a first fixing pin, 10, an upper end anchor chain, 11, a second fixing pin, 12, a chain guide hole, 13, an installation ship (AHV), 14, an anchor, 15, a chain rope joint, 16, a polyester cable, 17, a first buoyancy ball, 18, an underwater tensioner, 19, a second buoyancy ball, 20, a floating production storage and offloading vessel (FPSO), 21, a winch, 22, an underwater Robot (ROV), 23 and a second eyelet.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element in question must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.
As shown in fig. 1, the present invention provides an underwater tensioner 18 comprising: the outer frame 1 plays a role in supporting and positioning, the chain stopping device 6 is used for stopping the movement of the anchor chain, the grooved pulley 5 plays a role in steering, the lower end anchor chain 2 and the upper end anchor chain 10 are arranged, one end of the outer frame 1 is provided with a first eyelet 3 and the grooved pulley 5, the other end of the outer frame is provided with a chain guide hole 12 and the chain stopping device 6, the lower end anchor chain 2 is connected to the first eyelet 3, the upper end anchor chain 10 penetrates through the chain guide hole 12, and after passing through the chain stopping device 6, the outer frame turns under the guidance of the grooved pulley 5; the external frame 1, the grooved pulley 5 and the chain stopping device 6 are underwater when working and are completely immersed in water; the chain stopping device 6 working under water is loosened and locked, so that the movement and the rest of the upper anchor chain 10 in the chain guide hole 12 and the grooved pulley 5 can be controlled.
In the embodiment of the present invention, the chain stopper 6 includes a chain stopper arm 7, a spring, an operating arm 8, a first fixing pin 9 and a second fixing pin 11, the first fixing pin 9 and the second fixing pin 11 are disposed on the outer frame 1 at the side of the chain guide hole 12 at intervals, and a gap formed between the first fixing pin 9 and the second fixing pin 11 is used for the upper anchor chain 10 to pass through; the chain stopping arm 7 is arranged on the external frame 1 through a pin shaft, and a counterclockwise torsional spring is arranged on the pin shaft, so that the chain stopping arm 7 is normally abutted against the first fixing pin 9 and the second fixing pin 11, and the upper end anchor chain 10 is locked; and an operating arm 8 for controlling the rotation on the chain stopping arm 7 is arranged on the pin shaft, so that after the operating arm 8 rotates, the chain stopping arm 7 is far away from the first fixing pin 9 and the second fixing pin 11, and the upper end anchor chain 10 is loosened. The spring action keeps the chain-stopping arm 7 in a state of stopping the movement of the upper anchor chain 10 during normal operation, and the chain-stopping arm 7 can be opened by operating the operating arm 8, so that the anchor chain 10 can move freely, and the arrow in figure 1 shows the moving direction of the chain-stopping arm 7.
In the embodiment of the present invention, the bottom end of the lower anchor chain 2 is connected to a polyester cable 16 through a chain rope joint 15, the bottom of the polyester cable 16 is provided with an anchor 14, so as to realize bottom installation of a mooring cable, and the lower anchor chain 2 and the polyester cable 16 form a lower anchor cable.
In the embodiment of the present invention, in the installation state, the upper end of the upper end anchor chain 10 is connected to the second hole 23 of the floating production storage and offloading vessel 20, the lower end of the upper end anchor chain 10 is connected to the winch 21 of the installation vessel 13, and the installation vessel 13 is provided with the underwater robot 22 for observation and operation from top to bottom, as shown in fig. 3. In operation, the upper end of the upper chain 10 is connected to the second eyelet 23 of the floating production, storage and offloading vessel 20, and the lower end of the upper chain 10 is connected to the second buoyant ball 19, as shown in fig. 4.
In the embodiment of the present invention, the grooved pulley 5 is installed on the outer frame 1 through the pulley shaft 4. Preferably, the grooved pulley 5 is a five grooved pulley, and of course, in other embodiments of the present invention, the grooved pulley 5 may also be a four grooved pulley or a six grooved pulley, and the number of grooves is set to adjust according to the size of the anchor chain and the size of the underwater tensioner 18.
In an embodiment of the present invention, the anchor 14 is a suction anchor, a drag through anchor, a normal bearing anchor or a power penetration anchor, etc. for achieving the anchoring of the bottom.
As shown in fig. 1-4, a method of using the underwater tensioner 18 described above, comprising the steps of:
an installation vessel 13 (AHV) arrives at a designated sea area before a floating production, storage and offloading vessel (FPSO)20 is in place, an anchor 14, a lower end anchor chain 2 and a polyester cable 16 are installed and connected, a first buoyancy ball 17 is tied on the top end of the lower end anchor chain 2, the lower end mooring cable comprises two parts of the polyester cable 16 and the anchor chain 2, the two parts are connected through an H-shaped chain rope joint 15, and the buoyancy ball 17 is tied on the top end 2 of the lower end mooring cable for convenient searching, as shown in fig. 2.
After the floating production/storage/offloading vessel 20 is in place, the installation vessel 13 connects the upper end chain 10 placed on the installation vessel 13 to the second eyelet 23 of the floating production/storage/offloading vessel 20, the second eyelet 23 is provided with a tension measuring device such as a strain gauge for detecting tension changes on the mooring lines, then the installation vessel 13 is far away from the floating production/storage/offloading vessel 20, the lower end chain 2 is connected to the first eyelet 3 of the underwater tensioner 18 carried on the installation vessel 13 after the buoyancy ball 17 is found, the upper end chain 10 is connected to the winch 21 end cable on the installation vessel 13 after passing through the guide chain hole 12 of the underwater tensioner 18 and the pulley groove 5, then the underwater tensioner 18 is put into the sea again, and an underwater robot (ROV, RemotelyOperated Vehicle)22 carried on the installation vessel 13 is lowered to observe the operation of the underwater tensioner 18, preferably, the underwater robot 22 may be a H1000 model product of the ECA group, according to the requirements, different mechanical arms and hydraulic tools can be configured in a modularized mode, underwater observation, detection and light-weight work can be completed, the underwater robot 22 enables the chain stopping arm 7 to be opened by operating the operating arm 8 on the chain stopping device 6, the upper-end anchor chain 10 can move freely, the winch 21 on the installation ship 13 acts to tighten the upper-end anchor chain 10, when the tension on the upper-end anchor chain 10 reaches a preset value, the chain stopping device 6 works normally to prevent the upper-end anchor chain 10 from moving, and the mooring rope keeps preset tension.
And finally, the underwater robot 22 disconnects the auxiliary cable, and a second buoyancy ball 19 is arranged at the free end of the upper-end anchor chain 10 so as to facilitate the adjustment of the tension and the length of the mooring cable in the future.
The above steps are repeated to tension the plurality of mooring lines of the floating production storage offloading vessel 20.
Tensioner and application method under water, overspeed device tensioner such as anchor, lifting mechanism that can replace Floating structures multiple spot mooring system such as traditional Floating Production Storage unloading ship (FPSO, Floating Production Storage and overflowing vessel) adopted vacates more deck spaces, has saved expensive purchase cost such as anchor, does not need too many maintenance.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (8)
1. An underwater tensioner, comprising: the chain stopping device comprises an external frame, a chain stopping device, a belt groove pulley, a lower end anchor chain and an upper end anchor chain, wherein one end of the external frame is provided with a first eyelet and the belt groove pulley, the other end of the external frame is provided with a chain guide hole and the chain stopping device, the lower end anchor chain is connected to the first eyelet, and the upper end anchor chain passes through the chain guide hole and is guided by the belt groove pulley to turn;
the chain stopping device working under water is loosened and locked, and the movement and the rest of the upper end anchor chain in the chain guide hole and the grooved pulley can be controlled.
2. The underwater tensioner of claim 1,
the chain stopping device comprises a chain stopping arm, a spring, an operating arm, a first fixing pin and a second fixing pin, wherein the first fixing pin and the second fixing pin are arranged on the outer frame on the side of the chain guide hole at intervals, and a gap formed between the first fixing pin and the second fixing pin is used for the upper-end anchor chain to pass through;
the chain stopping arm is arranged on the external frame through a pin shaft, and a spring which is twisted anticlockwise is arranged on the pin shaft, so that the chain stopping arm is normally abutted against the first fixing pin and the second fixing pin, and the upper end anchor chain is locked;
and an operating arm for controlling the rotation on the chain stopping arm is arranged on the pin shaft, so that after the operating arm rotates, the chain stopping arm is far away from the first fixing pin and the second fixing pin, and the upper end anchor chain is loosened.
3. Underwater tensioner according to claim 1 or 2,
the bottom end of the lower anchor chain is connected with a polyester cable through a chain rope connector, and an anchor is arranged at the bottom of the polyester cable.
4. The underwater tensioner of claim 3,
in the installation state, the upper end of the upper end anchor chain is connected to a second eyelet of the floating production storage and offloading oil tanker, the lower end of the upper end anchor chain is connected to a winch of an installation vessel, and an underwater robot for observation and operation is placed on the installation vessel;
under the working state, the upper end of the upper end anchor chain is connected to a second eyelet of the floating production storage and offloading oil tanker, and the lower end of the upper end anchor chain is connected to a second buoyancy ball.
5. Underwater tensioner according to claim 1 or 2,
the grooved pulley is mounted on the outer frame by a pulley shaft.
6. The underwater tensioner of claim 5,
the grooved pulley is a five-grooved pulley.
7. The underwater tensioner of claim 3,
the anchor is a suction anchor, a drag penetration anchor, a normal bearing anchor or a power penetration anchor.
8. The underwater tensioner of claim 3,
the lower anchor chains and the polyester cables form lower mooring cables.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921142316.9U CN210139943U (en) | 2019-07-19 | 2019-07-19 | Underwater tensioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921142316.9U CN210139943U (en) | 2019-07-19 | 2019-07-19 | Underwater tensioner |
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| CN210139943U true CN210139943U (en) | 2020-03-13 |
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| CN201921142316.9U Active CN210139943U (en) | 2019-07-19 | 2019-07-19 | Underwater tensioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110316318A (en) * | 2019-07-19 | 2019-10-11 | 大连海事大学 | Underwater stretcher and its application method |
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2019
- 2019-07-19 CN CN201921142316.9U patent/CN210139943U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110316318A (en) * | 2019-07-19 | 2019-10-11 | 大连海事大学 | Underwater stretcher and its application method |
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