CN111332409B - Chain stopper and use method thereof - Google Patents
Chain stopper and use method thereof Download PDFInfo
- Publication number
- CN111332409B CN111332409B CN202010323142.7A CN202010323142A CN111332409B CN 111332409 B CN111332409 B CN 111332409B CN 202010323142 A CN202010323142 A CN 202010323142A CN 111332409 B CN111332409 B CN 111332409B
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- Prior art keywords
- chain
- anchor
- anchor chain
- box
- rotating shaft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/18—Stoppers for anchor chains
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
The invention provides a chain stopper and a use method thereof, wherein the chain stopper comprises: the box-shaped rack is fixedly arranged on the deck; the box-shaped rack is provided with a through shaft hole, a rotating shaft is arranged in the shaft hole, and the rotating shaft is connected with a stop arm, so that the stop arm can rotate along with the rotation of the rotating shaft; the rotating shafts are driven by a hydraulic device arranged inside the box-type rack, the hydraulic device comprises a hydraulic cylinder group, a pump group and an oil tank, the bottom of the cylinder body of the hydraulic cylinder group is hinged to the middle of the outer wall of the box-type rack, the top ends of piston rods of the hydraulic cylinder group are respectively hinged to two rotating shafts, and the rotating shafts can rotate along with the expansion and contraction of the piston rods. The invention adopts the double-cylinder design with middle arrangement, has compact structure and easy remote control operation, the top of the stop arm is an arc contact surface attached to the anchor chain, the contact area is increased, the stop effect is improved, the abrasion of the anchor chain is reduced, and the service life of the anchor chain is prolonged.
Description
Technical Field
The invention relates to a stopping mechanism, in particular to a chain stopper used on floating structures such as ships and the like and a using method thereof.
Background
The chain stopper is also called a chain stopper or a chain stopper and refers to a special tool for clamping or clamping the chain. The anchor chain is fixed between the anchor machine and the hawse pipe and separated from the hawse wheel, and is used for bearing the tensile force of the anchor and the hawse when the anchor is received and anchored, so that the tensile force is not transmitted to the hawse wheel. Commonly used are screw chain stopper, knife chain stopper, tongue type chain stopper, cam chain stopper, chain type chain stopper, roller knife chain stopper and the like.
With the development speed of ocean oil and gas resources, floating production systems represented by floating production, storage and offloading vessels (FPSOs, floating Production Storage and Offloading) and semi-submersible platforms are favored by markets, and the current chain stopper cannot adapt to the work of pulling an anchor chain on a large-tonnage FPSO and a drilling platform. The anchor chain used on a larger ship or a floating production system is thicker and heavier, the stop structure of the chain stopper is heavier, the working strength of manually lifting or putting down by operators is very high, the operation speed and the working efficiency are lower, and the accuracy, the safety and the reliability of the operation process are not guaranteed. In addition, the top end of the stop arm of the traditional chain stopper is a plane and is in point contact with the anchor chain, so that the stress is large, the abrasion is also large, and the service life of the anchor chain is reduced. Finally, the conventional load monitoring device installed on the anchoring line has the defects of inaccurate and reliable monitoring and difficult data transmission.
Disclosure of Invention
According to the technical problems that the existing chain stopper cannot be suitable for large ships or other floating production systems, is low in working efficiency, short in service life of an anchor chain and the like, the chain stopper is compact in structure and easy to remotely control operation due to the adoption of the double-oil-cylinder design arranged in the middle, the contact area is increased, the structure is firmer, the abrasion of the anchor chain is reduced, and the service life of the anchor chain is prolonged.
The invention adopts the following technical means:
a chain stopper for use with a large floating structure, comprising: the box-shaped frame is fixedly arranged on the deck and is used for bearing the tensile force of the anchor and the anchor chain; two groups of symmetrically arranged through shaft holes are formed in the box-shaped rack along the front-rear direction, a rotating shaft is arranged in the shaft holes, and the rotating shaft is connected with a stop arm so that the stop arm can rotate along with the rotation of the rotating shaft; the rotating shafts are driven by a hydraulic device arranged inside the box-type rack, the hydraulic device comprises a hydraulic cylinder group, a pump group and an oil tank, the bottom of the cylinder body of the hydraulic cylinder group is hinged to the middle of the outer wall of the box-type rack, the top ends of piston rods of the hydraulic cylinder group are respectively hinged to two rotating shafts, and the rotating shafts can rotate along with the expansion and contraction of the piston rods.
Further, the anchor chain contact part at the top end of the stop arm is an arc surface attached to the anchor chain.
Further, the anchor chain contact part at the top end of the stop arm is made of high-strength alloy steel, and the surface hardness of the anchor chain contact part is lower than that of an anchor chain.
Further, a chain guide hole for the anchor chain to pass through is formed in the vertical direction of the box-shaped frame.
Further, the hydraulic cylinder group comprises two double-acting hydraulic cylinders with the same structure.
Further, the rotating shaft is arranged in the shaft hole through a ball bearing.
Further, a load sensor is arranged on the ball bearing.
The invention also provides a using method of the chain stopper, which comprises the following steps:
after the ship or other floating structures are anchored, in order to enable the anchoring machine not to bear the tensile force of the anchor and the anchor chain any more, an operator starts the hydraulic cylinder group to enable the oil way to be communicated, and pushes the piston rod of the hydraulic cylinder on the chain stopper to shrink, so that the rotating shaft is driven to rotate, further the movable arm is controlled to be closed inwards, and the oil way is locked until the two movable arms are attached to the chain ring of the anchor chain, so that the movable arm is fixed to the anchor chain.
Further, the method also comprises the step of monitoring the tension of the anchor chain by using a load sensor in the process of fixing the anchor chain by the stop arm.
Compared with the prior art, the invention has the following advantages:
1. the invention adopts the design of the double hydraulic cylinders arranged in the middle, has compact structure, is easy for remote control operation, reduces the working strength of operators, and enhances the safety and reliability of operation.
2. The top of the stop arm of the chain stopper is an arc-shaped contact surface attached to the anchor chain, so that the contact surface with the anchor chain is larger, the contact stress is reduced, the anchor chain is supported more firmly, the abrasion of the anchor chain is reduced, and the service life of the anchor chain is prolonged.
3. The invention can realize more accurate load monitoring through the strain type load sensor arranged at the ball bearing of the rotating shaft and is easy to replace.
For the reasons, the invention can be widely popularized in the field of ship machinery.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram of the starting state of the chain stopper according to the present invention. .
FIG. 2 is a schematic diagram showing the structure of the chain stopper in the closed state.
In the figure: 1. an anchor chain; 2. a box-type frame; 3. a chain guide hole; 4. a stop arm; 5. an oil inlet and outlet; 6. a hydraulic cylinder; 7. a piston rod; 8. a rotating shaft; 9. and (3) a deck.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of 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 apparent 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 exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the 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 exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be clear that the dimensions of the respective parts shown in the drawings are not drawn in actual scale for 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 specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention: the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative 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 in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
As shown in FIG. 1, the invention provides a chain stopper which is applied to a large floating structure and mainly comprises a box-type frame, a stop arm and a hydraulic device.
The box-shaped frame can be arranged on a deck of a ship or other floating structures and is used for bearing the tensile force of an anchor and an anchor chain, two groups of shaft holes which are symmetrically arranged are formed in the box-shaped frame, a rotating shaft is arranged in the shaft holes, and the rotating shaft is arranged in the shaft holes through ball bearings. The ball bearing is provided with a load sensor, and preferably, a replaceable strain type load sensor is selected. And a chain guide hole for the anchor chain to pass through is formed in the vertical direction of the box-type frame.
The stop arm is arranged on the rotating shaft and rotates together with the rotating shaft. As a preferred embodiment, the contact part of the anchor chain at the top end of the stop arm is an arc surface which is attached to the anchor chain, and the contact part of the anchor chain at the top end of the stop arm is made of high-strength alloy steel, and the surface hardness of the contact part is lower than that of the anchor chain.
The hydraulic device mainly comprises a hydraulic cylinder group, a pump group, a reversing valve, a one-way valve, an oil tank and the like, wherein the hydraulic cylinder group comprises two double-acting hydraulic cylinders with the same structure, the bottom of each cylinder body is hinged to the middle part of the outer wall of the box-type rack, the top ends of piston rods of the hydraulic cylinder group are respectively hinged to two rotating shafts, and the rotating shafts rotate along with the expansion and contraction of the piston rods. The valve structure is used for controlling the action of the hydraulic cylinder. The pump unit comprises an electric pump and a manual pump.
The technical scheme of the invention is further described by specific examples.
Example 1
As shown in fig. 1, the present invention provides a chain stopper comprising: the box-shaped frame 2 has the functions of fixing and bearing, the stop arm 4 has the function of stopping a chain and the hydraulic device for providing power for the rotation of the stop arm 4.
Two groups of shaft holes which are symmetrically arranged are formed in the box-shaped frame 2, a rotating shaft 8 is arranged in each shaft hole, and the stop arms 4 are arranged on the rotating shaft 8 and rotate together with the rotation of the rotating shaft 8. The bottom of the box-type frame 2 is provided with a chain guide hole 3, and the anchor chain 1 passes through the chain stopper through the chain guide hole 3.
The top end of the stop arm 4 is in an arc-shaped design for being attached to the anchor chain, the contact surface is large, and the double stop arms are contacted with the anchor chain 1, so that the contact stress is further reduced. The top end of the anchor chain is made of high-strength alloy steel, the surface hardness of the anchor chain is lower than that of the anchor chain 1, and the anchor chain 1 is protected from damage.
The hydraulic device comprises a hydraulic cylinder group 6, a pump group, an oil tank and the like. The bottom of the cylinder body of the hydraulic cylinder group 6 is hinged to the middle of the outer wall of the box-type frame 2, the top ends of the piston rods 7 of the hydraulic cylinder group 6 are respectively hinged to two rotating shafts 8, and the rotating shafts 8 rotate along with the expansion of the piston rods 7. The rotating shaft 8 is arranged in the shaft hole through a ball bearing, and the ball bearing is provided with a replaceable load sensor, and preferably, a strain type load sensor is selected. The hydraulic cylinder group 6 is two identical double-acting hydraulic cylinders, the hydraulic cylinder 6 is provided with a hydraulic oil inlet and outlet 5, and the piston rod 7 can realize the actions of contracting and extending in two directions by changing the inlet and outlet directions of hydraulic oil. In addition, the hydraulic device also comprises a reversing valve and a one-way valve which control the action of the hydraulic oil cylinder 6, and the piston rod 7 of the oil cylinder is controlled to shrink and stretch by changing the direction of an oil way.
The pump group comprises an electric pump and a manual pump, the electric pump is started to pump oil to the hydraulic oil cylinder 6 through a hydraulic pipeline in normal operation, the oil cylinder is driven to act for remote control operation, and the manual pump can be used for manual operation under special conditions
Example 2
Based on the embodiment 1, the invention also provides a using method of the chain stopper, and fig. 1 and 2 show two forms of the chain stopper in the using process, and the using method specifically comprises the following steps:
after the ship or other floating structures are anchored, in order to ensure that the anchor machine is not stressed by the tensile force of the anchor and the anchor chain 1 any more, an operator starts an electric pump, a reversing valve acts, the reversing valve is separated from the middle position and communicated with an oil path, a hydraulic cylinder piston rod 7 on a pushing chain stopper is contracted to drive a rotating shaft 8 to rotate towards the direction close to the anchor chain 1, a stop arm 4 rotates along with the rotating shaft, the stop arms 4 are gradually closed inwards until the two stop arms 4 are attached to the chain links of the anchor chain 1, the reversing valve returns to the middle position and the oil path is locked, the anchor chain 1 is held by the stop arm 4 at the moment, the tensile force of the anchor chain 1 is transmitted to the stop arm 4 and a box-shaped frame 2, and a load sensor in a bearing of the rotating shaft 8 monitors the tensile force of the anchor chain 1 to prevent the anchor chain 1 from being damaged;
when emergency situations such as power failure occur, the manual pump can be used for driving the hydraulic cylinder 6, so that the situation that the chain stopper cannot work is avoided.
The chain stopper adopts a double-cylinder design with middle arrangement, is compact in structure and easy to remotely control, the top of the stop arm is an arc-shaped contact surface attached to the anchor chain, the chain stopper is firmer, the abrasion of the anchor chain is reduced, and the service life of the anchor chain is prolonged.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (7)
1. A chain stopper for use with a large floating structure, comprising:
the box-shaped frame (2) is fixedly arranged on the deck (9) and is used for bearing the tensile force of the anchor and the anchor chain (1), and a chain guide hole (3) for the anchor chain (1) to pass through is formed in the vertical direction of the box-shaped frame (2);
two groups of symmetrically arranged through shaft holes are formed in the box-shaped frame (2) along the front-rear direction, a rotating shaft (8) is arranged in the shaft holes, the rotating shaft (8) is connected with a stop arm (4), the stop arm (4) can rotate in a vertical plane along with the rotation of the rotating shaft (8), and an anchor chain contact part at the top end of the stop arm (4) is arranged to be attached to an arc surface of an anchor chain (1);
the rotating shafts (8) are driven by a hydraulic device arranged in the box-shaped frame, the hydraulic device comprises a hydraulic cylinder group (6), a pump group and an oil tank, the bottom of a cylinder body of the hydraulic cylinder group (6) is hinged to the middle part of the outer wall of the box-shaped frame (2), and the top ends of piston rods (7) of the hydraulic cylinder group (6) are respectively hinged to the two rotating shafts (8), so that the rotating shafts (8) can rotate along with the expansion and contraction of the piston rods (7);
after the anchor is thrown, in order to enable the anchor machine not to bear the tensile force of the anchor and the anchor chain (1), an electric pump of the hydraulic oil cylinder group (6) is started, a reversing valve acts, the reversing valve is separated from the middle position and is communicated with an oil way, a piston rod (7) of the hydraulic oil cylinder is pushed to shrink, a rotating shaft (8) is driven to rotate towards the direction close to the anchor chain (1), a stop arm (4) also rotates along with the rotating shaft, the stop arm (4) is gradually closed inwards until the two stop arms (4) are attached to chain links of the anchor chain (1), the reversing valve returns to the middle position and the oil way is locked, at the moment, the anchor chain (1) is held by the stop arm (4), and the tensile force of the anchor chain (1) is transmitted to the stop arm (4) and the box-shaped frame (2).
2. The chain stopper according to claim 1, characterized in that the anchor chain contact part at the top end of the stopper arm (4) is made of high-strength alloy steel, and the surface hardness of the anchor chain contact part is lower than that of the anchor chain (1).
3. The chain stopper according to claim 1, characterized in that the hydraulic cylinder group (6) comprises two structurally identical double-acting hydraulic cylinders.
4. The chain stopper according to claim 1, characterized in that the rotating shaft (8) is mounted in the shaft hole by means of a ball bearing.
5. The chain stopper of claim 4, wherein the ball bearing is provided with a load sensor.
6. A method of using the chain stopper of claim 1, comprising:
after the ship or other floating structures are anchored, in order to enable the anchoring machine not to bear the tensile force of the anchor and the anchor chain any more, an operator starts the hydraulic cylinder group to enable the oil way to be communicated, and pushes the piston rod of the hydraulic cylinder on the chain stopper to shrink, so that the rotating shaft is driven to rotate, further the movable arm is controlled to be closed inwards, and the oil way is locked until the two movable arms are attached to the chain ring of the anchor chain, so that the movable arm is fixed to the anchor chain.
7. The method of using the chain stopper of claim 6, further comprising monitoring the chain tension with a load cell during the securing of the chain by the stopper arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010323142.7A CN111332409B (en) | 2020-04-22 | 2020-04-22 | Chain stopper and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010323142.7A CN111332409B (en) | 2020-04-22 | 2020-04-22 | Chain stopper and use method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111332409A CN111332409A (en) | 2020-06-26 |
| CN111332409B true CN111332409B (en) | 2023-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010323142.7A Active CN111332409B (en) | 2020-04-22 | 2020-04-22 | Chain stopper and use method thereof |
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| Country | Link |
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| CN (1) | CN111332409B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113702191A (en) * | 2021-08-24 | 2021-11-26 | 南京中船绿洲机器有限公司 | Test method and device for roller chain stopper |
| CN114560040A (en) * | 2022-02-22 | 2022-05-31 | 海洋石油工程股份有限公司 | Manual open-close type anchor chain recycling and chain stopping device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3289626A (en) * | 1965-08-19 | 1966-12-06 | Mcdermott & Co J Ray | Chain stoppers |
| JPH09277981A (en) * | 1996-04-16 | 1997-10-28 | Tateno Seisakusho:Kk | Chain cable compressor |
| WO2011126171A1 (en) * | 2010-04-08 | 2011-10-13 | 미래산업기계 주식회사 | Fairleader having a chain stopper |
| CN209553440U (en) * | 2019-02-14 | 2019-10-29 | 交通运输部北海航海保障中心秦皇岛航标处 | A kind of hydraulic anchor chain release |
| CN211996055U (en) * | 2020-04-22 | 2020-11-24 | 大连海事大学 | Chain stopper |
-
2020
- 2020-04-22 CN CN202010323142.7A patent/CN111332409B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3289626A (en) * | 1965-08-19 | 1966-12-06 | Mcdermott & Co J Ray | Chain stoppers |
| JPH09277981A (en) * | 1996-04-16 | 1997-10-28 | Tateno Seisakusho:Kk | Chain cable compressor |
| WO2011126171A1 (en) * | 2010-04-08 | 2011-10-13 | 미래산업기계 주식회사 | Fairleader having a chain stopper |
| CN209553440U (en) * | 2019-02-14 | 2019-10-29 | 交通运输部北海航海保障中心秦皇岛航标处 | A kind of hydraulic anchor chain release |
| CN211996055U (en) * | 2020-04-22 | 2020-11-24 | 大连海事大学 | Chain stopper |
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| Publication number | Publication date |
|---|---|
| CN111332409A (en) | 2020-06-26 |
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