A ship roll test device and its application method

Abstract

This invention discloses a ship roll testing device and its application method. The ship roll testing device includes two testing mechanisms spaced apart on both sides of the dock chamber's width direction. Each testing mechanism includes a slide rail, a movable seat, a support arm, and a winch. The slide rail is located on the top of the side wall in the dock chamber's width direction. The movable seat is slidably mounted on the slide rail. The support arm and winch are both mounted on the movable seat. The end of the support arm away from the movable seat extends obliquely into the dock chamber. A cable extends from the winch. A guide pulley is provided at the end of the support arm away from the movable seat, slidably connected to the cable. The end of the cable away from the winch passes through the guide pulley and connects to the ship's deck inside the dock chamber. The guide pulley can rotate on the support arm to guide the cable's movement. The cables on the two testing mechanisms alternately extend and retract, causing the ship to roll inside the dock chamber. The device offers high testing accuracy, good safety, and high operational efficiency.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding technology, and in particular to a ship roll testing device and a method for applying the ship roll testing device. Background Technology

[0002] Before a completed ship is put into normal service, it needs to undergo a roll test to determine its roll period. The roll period refers to the time it takes for the ship to complete one full roll cycle when it is in resonance in still water.

[0003] Traditional ship rolling tests typically involve towing the vessel to a dock after it has been undocked, mooring it in waters near the dock, and having multiple people run back and forth on the deck along the ship's width to measure the rolling period. However, this method has the following drawbacks: 1. Because the test is conducted in waters near the dock, the waves there affect the rolling period, leading to poor accuracy in the test; 2. The presence of multiple people running on the deck increases the risk of injury and reduces testing efficiency. Summary of the Invention

[0004] One objective of this invention is to provide a ship roll testing device that offers high testing accuracy, good safety, and high operational efficiency.

[0005] Another objective of this invention is to provide a method for applying a ship roll testing device, which facilitates roll testing of ships and improves the accuracy of roll testing.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] On one hand, a ship roll testing device is provided, comprising two testing mechanisms distributed at intervals on both sides of the dock chamber width direction. Each testing mechanism includes a slide rail, a movable seat, a support arm, and a winch. The slide rail is disposed on the top of the side wall in the width direction of the dock chamber, and the length of the slide rail extends along the length direction of the dock chamber. The movable seat is slidably disposed on the slide rail. The support arm and the winch are both disposed on the movable seat. The end of the support arm away from the movable seat extends obliquely into the dock chamber. The winch extends with a cable. The end of the support arm away from the movable seat is provided with a guide pulley slidably connected to the cable. The end of the cable away from the winch passes through the guide pulley and connects to the ship's deck inside the dock chamber. The guide pulley can rotate on the support arm to guide the movement of the cable. The cables on the two testing mechanisms alternately extend and retract to cause the ship to roll inside the dock chamber.

[0008] As a preferred technical solution for the aforementioned ship roll test device, the support arm is a hydraulic telescopic rod.

[0009] As a preferred technical solution of the aforementioned ship roll test device, a fixing rod is provided on the non-end of the support arm, and the end of the fixing rod away from the support arm abuts against the top of one side wall in the width direction of the dock chamber.

[0010] As a preferred technical solution of the aforementioned ship roll test device, the support arm is rotatably connected to the top of the movable seat, and the fixed rod is hinged to the support arm.

[0011] As a preferred technical solution for the aforementioned ship roll test device, the cable is connected to the lifting lug on the ship's deck via a hook.

[0012] As a preferred technical solution of the aforementioned ship roll test device, the winch includes a drum and a drive unit. The two ends of the drum are rotatably mounted on the movable base via support seats. The drive unit is connected to the drum and is used to drive the drum to rotate around its own axis. The cable is wound around the outer periphery of the drum.

[0013] As a preferred technical solution of the aforementioned ship roll test device, the start and stop of the drive component is controlled by a controller.

[0014] As a preferred technical solution of the aforementioned ship roll test device, the slide rail includes a groove recessed in the top of the side wall in the width direction of the dock chamber, and a moving wheel protruding from the bottom of the movable seat, the moving wheel being slidably disposed inside the groove.

[0015] As a preferred technical solution of the ship roll test device, each slide rail includes two slide grooves, which are distributed along the width direction of the dock chamber. The movable seat has two sets of movable wheels, and each slide groove in the same test mechanism corresponds to a set of movable wheels.

[0016] On the other hand, a method for applying the above-mentioned ship roll test device is also provided, including the following steps: water is injected into the dock chamber of the dock, causing the ship to float in the dock chamber and separate from the dock pier inside the dock chamber; along the length direction of the slide rail, the support arm and cable are moved to the working position via the moving seat and the cable is connected to the ship inside the dock; a winch of one test mechanism winds up the cable, and a winch of another test mechanism simultaneously releases the cable, causing the ship inside the dock chamber to roll, and the period of the ship roll is recorded.

[0017] The beneficial effects of this invention are as follows: This ship roll test device can conduct roll tests directly inside the dock before the ship leaves the dock, without having to move the ship out to the dock for roll tests. The water inside the dock is still water, reducing the impact of waves. There are fewer influencing factors than when conducting roll tests on the dock, which helps to improve the accuracy of roll tests. In addition, during roll tests, the ship is pulled by the cable winding machine to wind and unwind the cable, which replaces the operation of multiple people running on the ship. This avoids the risk of personnel injury caused by multiple people running, has higher safety, saves manpower and material resources, and has high operating efficiency. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a structural diagram of the ship roll test device described in the embodiment, installed on the dock (when the cable is not connected to the ship's deck).

[0020] Figure 2 This is a structural diagram of the ship roll test device described in the embodiment, installed on the dock (when the cable is connected to the ship's deck).

[0021] Figure 3 This is a top view of the slide rail described in the embodiment on the dock room.

[0022] In the picture:

[0023] 100. Testing mechanism; 200. Dock; 201. Dock room; 202. Dock pier; 300. Ship; 301. Ship deck; 302. Lifting lug; 1. Slide rail; 11. Slide groove; 2. Moving seat; 21. Moving wheel; 3. Support arm; 31. Fixed section; 32. Telescopic section; 4. Cable; 41. Hook; 5. Fixed rod; 6. Winch; 61. Drum; 7. Support plate; 8. First rotating shaft; 9. Connecting part. Detailed Implementation

[0024] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] like Figures 1 to 3As shown, this invention provides a ship roll testing device, which is used in conjunction with a dock 200. The ship roll testing device includes two testing mechanisms 100, which are spaced apart on both sides of the dock chamber 201 of the dock 200 along its width direction (i.e., the X direction in the figure). Each testing mechanism 100 includes a slide rail 1, a movable seat 2, a support arm 3, and a winch 6. The slide rail 1 is located on the top of the side wall of the dock chamber 201 along its width direction, and its length extends along the length direction of the dock chamber 201 (i.e., the Y direction in the figure). The movable seat 2 is slidably mounted on the slide rail 1, and the support arm 3 and the winch 6 are both mounted on the movable seat. 2. The support arm 3 extends obliquely into the dock chamber 201 at the end away from the moving seat 2. The winch 6 extends a cable 4. The end of the support arm 3 away from the moving seat 2 is equipped with a guide pulley (not shown in the figure) that is slidably connected to the cable 4. The end of the cable 4 away from the winch 6 passes through the guide pulley 21 and connects to the hull deck 301 inside the dock chamber 201. The guide pulley 21 can rotate on the support arm 3 to guide the movement of the cable 4. The cables 4 on the two test mechanisms 100 are alternately wound and released to make the ship 300 roll inside the dock chamber 201. In this example, the cable 4 is a steel cable. When the ship 300 is being built, the ship 300 is supported in the dock chamber 201 of the dock 200 by the dock pier 202, and the length direction of the ship 300 is parallel to the length direction of the dock chamber 201. Before the roll test, water is injected into the dock chamber 201 to make the ship 300 float in the dock chamber 201 and separate the ship 300 from the dock pier 202. By cooperating with the movable seat 2 and the slide rail 1, the two test mechanisms 100 are moved along the length of the slide rail 1 to the middle position of the vessel 300, so that the cables 4 of the two test mechanisms 100 are respectively connected to the middle position of the deck of the vessel 300 in the length direction. The support arm 3 supports the cable 4 released from the winch 6, and the winch 6 can control the length of the cable released. In actual use, the winch 6 of one test mechanism 100 winds up the cable 4 of a set length, and the winch 6 of the other test mechanism 100 simultaneously releases the cable 4 of a set length, causing the vessel 300 to roll inside the dock 201.When the vessel 300 is being built inside the dock 200, it is supported by dock piers 202. After the vessel 300 is completed, it needs to be undocking. Before undocking, water is injected inside the dock to make the vessel 300 float and separate from the dock piers 202. This type of ship roll test device allows the vessel 300 to be tested directly inside the dock 200 before undocking, without having to move the vessel 300 to the dock 200 for roll testing on the pier. The water inside the dock 200 is still water, reducing the impact of waves and having fewer influencing factors than when testing roll on the pier, which helps improve the accuracy of the roll test. In addition, during the roll test, the winch 6 uses the cable 4 to pull the vessel 300, replacing the operation of multiple people running on the vessel 300. This avoids the risk of injury caused by multiple people running, has higher safety, saves manpower and resources, and has high operational efficiency.

[0028] It is understandable that the ship 300 is built inside the dock chamber 201. Therefore, the distance between the ship 300 and the inner wall of the dock chamber 201 is different for ships 300 of different widths. In order to make the ship roll test device adaptable to ships 300 of different widths, the support arm 3 is set as a hydraulic telescopic rod. By adjusting the length of the hydraulic telescopic rod, the length of the support arm 3 extending into the dock chamber 201 is adjusted so that the telescopic arm can adapt to ships 300 of different widths, which is beneficial for rolling tests.

[0029] Preferably, a fixing rod 5 is provided on the non-end portion of the support arm 3, and the end of the fixing rod 5 away from the support arm 3 abuts against the top of one side wall in the width direction of the dock chamber 201. The fixing rod 5 is used to provide support force for the support arm 3 and enhance the load-bearing capacity of the support arm 3.

[0030] In this embodiment, the hydraulic telescopic rod has a fixed section 31 and a telescopic section 32 connected to the fixed section 31. The fixed section 31 is connected to the movable seat 2, and the telescopic section 32 is away from the movable seat 2. The guide pulley 21 is set at the end of the telescopic section 32 away from the fixed section 31. The telescopic section 32 can extend and retract relative to the fixed section 31. The fixed rod 5 is connected to the fixed section 31 to avoid the fixed rod 5 affecting the extension and retraction of the hydraulic telescopic rod.

[0031] Furthermore, the support arm 3 is rotatably connected to the top of the movable seat 2, and the fixed rod 5 is hinged to the support arm 3. The fixed rod 5 is hinged to the support arm 3 via a damping shaft. Specifically, the top of the movable seat 2 has a protruding connecting part 9. The end of the support arm 3 away from the guide pulley 21 is rotatably connected to the connecting part 9 via a first rotating shaft 8, driving the first rotating shaft 8 to rotate on the connecting part 9, thereby rotating the support arm 3 relative to the connecting part 9 to adjust the tilt angle of the support arm 3. This allows the guide pulley 21 on the support arm 3 to be adjusted to be directly above the connection position between the cable 4 and the hull deck 301, which helps to balance the force on the ship 300 and position the ship 300 in the middle of the width direction of the dock 201. Since the fixed rod 5 is hinged to the support arm 3, the fixed rod 5 can be rotated around the hinge between it and the support arm 3 to adapt to the tilt angle of the support arm 3. When it is necessary to move the movable seat 2 on the slide rail 1, the fixed rod 5 can be stored on one side of the support arm 3. At this time, the end of the fixed rod 5 away from the support arm 3 does not abut against the top of the side wall of the dock chamber 201, which facilitates the movement of the movable seat 2.

[0032] Two lifting lugs 302 are installed on the hull deck 301, spaced apart along the width of the hull deck 301. Two testing mechanisms 100 correspond one-to-one with the lifting lugs 302 on the same side of the hull deck 301. The cable 4 is connected to the lifting lugs 302 on the hull deck 301 via a hook 41, facilitating connection between the cable 4 and the hull deck 301. In this example, the hook 41 is an anti-drop hook, improving operational safety.

[0033] In this embodiment, the winch 6 includes a drum 611 and a drive unit (not shown in the figure). Both ends of the drum 611 are rotatably mounted on the movable base 2 via support seats. The drive unit is connected to the drum 611 and drives the drum 611 to rotate around its own axis. The cable 4 is wound around the outer periphery of the drum 611. The drive unit provides the power source for the rotation of the drum 611. The drive unit is existing technology, and its specific structure will not be described in detail here. The support seat includes two support plates 7 disposed on the top of the movable base 2. The two support plates 7 are spaced apart on the movable base 2, and a placement position for the drum 611 is formed between the two support plates 7. Both ends of the drum 611 in the axial direction are rotatably connected to the support plates 7 on both sides of the placement position via a second rotating shaft. The drive unit drives the drum 611 to rotate, realizing the lengthening and shortening of the cable.

[0034] To facilitate cable unwinding and rewinding, in this embodiment, the start and stop of the drive unit are controlled by a controller. Specifically, the location of the controller can be flexibly set according to actual needs, and there is no specific limitation on the location of the controller.

[0035] Specifically, the slide rail 1 includes a groove 11 recessed in the top of the side wall in the width direction of the dock chamber 201, and a moving wheel 21 protruding from the bottom of the movable seat 2. The moving wheel 21 is slidably disposed inside the groove 11 and can slide along the length direction of the groove 11, so that the movable seat 2 can slide on the slide rail 1.

[0036] In this embodiment, each slide rail 1 includes two slide grooves 11, which are distributed along the width direction of the dock chamber 201. The movable seat 2 has two sets of movable wheels. Each slide groove 11 in the same test mechanism 100 corresponds to a set of movable wheels 21, thereby increasing the contact points between the movable seat 2 and the slide rail 1 and improving the movement stability of the movable seat 2.

[0037] In another embodiment, a method for applying the above-mentioned ship roll test device is also provided, including the following steps: water is injected into the dock chamber 201 of the dock 200, so that the ship 300 floats inside the dock chamber 201 and separates from the dock pier 202 inside the dock chamber 201. Along the length direction of the slide rail 1, the support arm 3 and the cable 4 are moved to the working position through the moving seat 2 and the cable 4 is connected to the ship 300 inside the dock 200. The winch 6 of one test mechanism 100 winds up the cable 4, and the winch 6 of the other test mechanism 100 simultaneously releases the cable 4, so that the ship 300 inside the dock chamber 201 rolls, and the rolling period of the ship 300 is recorded. In this method of applying the ship roll test device, two test mechanisms 100 on both sides of the dock chamber 201 cooperate. The winch 6 of one test mechanism 100 winds up the cable 4, while the winch 6 of the other test mechanism 100 simultaneously releases the cable 4, causing the ship 300 inside the dock chamber 201 to roll. The roll test is conducted on the ship 300 on the dock 200. This method differs from the traditional technique of conducting roll tests on the ship 300 in the dock waters outside the dock 200. Because the water inside the dock 200 is still, the influence of waves on the roll test is reduced. This method of applying the ship roll test device has fewer influencing factors than the roll test conducted on the dock, which helps to improve the accuracy of the roll test. In addition, the use of the cable 4 to pull the ship 300 during the roll test replaces the operation of multiple people running on the ship 300, avoiding the risk of personnel injury caused by multiple people running, which has higher safety, saves manpower and material resources, and helps to improve operational efficiency.

[0038] In specific operation, the winches 6 in the two test institutions 100 have the same frequency of winding and unwinding the cable 4. That is, the length of the cable 4 wound by the winch 6 of one test institution 100 is L1, and at the same time the length of the cable 4 unwound by the winch 6 of the other test institution 100 is L2, L1 = L2, to ensure that the ship 300 rolls stably.

[0039] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings, and are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0040] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0042] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of the invention without inventive effort, and these embodiments will all fall within the scope of protection of the present invention.

Claims

1. A ship roll testing device, characterized in that , including two test mechanisms, two test mechanisms are distributed along the width direction of the dock chamber, two test mechanisms include slide rails, moving seats, support arms and winches, the slide rails are arranged on the top of the side wall in the width direction of the dock chamber, and the length of the slide rails extends along the length direction of the dock chamber, the moving seats are slidably arranged on the slide rails, the support arms and the winches are arranged on the moving seats, the support arms extend obliquely to the inside of the dock chamber at one end away from the moving seats, the winches extend with cables, the end of the cable away from the winches is connected with the hull deck in the inside of the dock chamber through the guide pulley, and the guide pulley can rotate on the support arm to guide the movement of the cable. The cable is connected with the lifting lug on the hull deck through a lifting hook.

2. A ship roll test device according to claim 1, characterised in that, The support arm is a hydraulic telescopic rod.

3. A ship roll testing arrangement according to claim 2, characterised in that, A fixed rod is arranged on the non-end part of the support arm, and one end of the fixed rod away from the support arm abuts against the top of the side wall in the width direction of the dock chamber.

4. A ship roll testing arrangement according to claim 3, characterised in that, The support arm is rotationally connected with the top of the moving seat, and the fixed rod is hinged with the support arm.

5. The ship roll testing apparatus of claim 1, wherein, The winch includes a winding drum and a driving piece, both ends of the winding drum are rotationally arranged on the moving seat through a support seat, the driving piece is connected with the winding drum and used to drive the winding drum to rotate around its axis, and the cable is arranged on the outer circumferential side of the winding drum.

6. A ship roll testing arrangement according to claim 5, characterised in that, The start and stop of the driving piece are controlled by a controller.

7. A roll test apparatus for a marine vessel according to any one of claims 1 to 6, characterised in that, The slide rail includes a sliding groove recessed on the top of the side wall in the width direction of the dock chamber, and the bottom of the moving seat is protrudingly provided with a moving wheel which is slidably arranged in the sliding groove.

8. A ship roll testing arrangement according to claim 7, characterised in that, Each slide rail includes two sliding grooves which are distributed along the width direction of the dock chamber, and the moving seat is provided with two groups of moving wheels, and each sliding groove in the same test mechanism corresponds to one group of moving wheels.

9. A method of using the ship roll test apparatus according to any one of claims 1 to 7, characterized in that, The method comprises the following steps: After the dock chamber is filled with water, the ship floats in the dock chamber and separates from the dock pier, the support arm and the cable are moved to the working position through the moving seat along the length direction of the slide rail, the cable is connected with the ship in the dock, one winch of one test mechanism winds the cable, the winch of the other test mechanism simultaneously unwinds the cable, the ship in the dock chamber rolls, and the period of the ship rolling is recorded.

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