Swinging stopping system and swinging stopping method for A-type hanging bracket

Abstract

The invention discloses a swing stopping system and method for an A-type hanging bracket, and belongs to the technical field of ships. The A-type hanging bracket is arranged on a deck of the ship body, and a hoisting device is arranged on the A-type hanging bracket and used for hoisting equipment; the oscillation stopping system comprises a traction device, a guide mechanism and a monitoring device, and the traction device is arranged on the deck and used for pulling the traction rope; the guide mechanism is arranged on the ship body, the traction rope is guided by the guide mechanism to connect the traction device and the equipment, and the traction rope is connected with a lifting point of the equipment to form oblique tension towards the side surface of the ship body on the equipment; the monitoring device is in communication connection with the traction rope and the traction device and used for adjusting the winding and unwinding speed and tension of the traction device on the traction rope, the problem that the A-type hanging bracket equipment shakes in the high freeboard scene is solved, and the operation safety and efficiency are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ship technology, and in particular to a sway damping system and method for an A-type davit. BACKGROUND

[0002] Currently, A-type davits are widely used in various ships with small freeboard, such as research vessels and small engineering vessels. In these ships, the distance from the davit deck to the water surface is relatively short, usually a few meters. In this case, when the equipment is lowered or recovered from the davit, the sway amplitude of the equipment is relatively small due to the short distance, and the impact on the lowering operation is also small, so no sway damping system is usually installed. However, when the A-type davit is applied to a high freeboard ship, the following problems exist: (1) lack of dynamic balance: when the equipment is lowered / recovered from the high freeboard, it is easily swayed due to the influence of sea currents, waves and hoisting inertia, and the traditional A-type davit has no effective sway damping system; (2) safety risk: the equipment sway increases the risk of collision with the ship body, especially in severe sea conditions, which may cause equipment damage or personnel injury; (3) low efficiency: frequent operation pauses are required to manually adjust the equipment posture, which prolongs the operation cycle and cannot meet the high-efficiency operation requirements of offshore platforms. SUMMARY

[0003] The purpose of the present application is to provide a sway damping system and method for an A-type davit, which solves the problem of equipment sway in the high freeboard scenario and improves the safety and efficiency of the operation.

[0004] To achieve this purpose, the present application adopts the following technical solutions:

[0005] A sway damping system for an A-type davit, the A-type davit being arranged on a deck of a ship body, a hoisting device being arranged on the A-type davit, the hoisting device being used for hoisting equipment; the sway damping system comprising:

[0006] a traction device arranged on the deck and used for traction of a traction rope;

[0007] a guide mechanism arranged on the ship body, the traction rope being guided through the guide mechanism to connect the traction device and the equipment, the traction rope being connected to a hoisting point of the equipment to form a diagonal tension to the side of the ship body on the equipment;

[0008] a monitoring device in communication connection with the traction rope and the traction device, the monitoring device being used for adjusting the speed and tension of the traction device on the traction rope.

[0009] In some possible implementations, the traction device comprises a first traction mechanism, the traction rope comprises a first steel wire rope, the guide mechanism comprises a first guide pulley block, the first steel wire rope is guided through the first guide pulley block to connect the first traction mechanism and a first lifting point of the equipment, the first lifting point is located on one side of the equipment along a direction parallel to the hull to form an oblique pulling force on the equipment towards the inside of the hull and the side of the first lifting point.

[0010] In some possible implementations, the first steel wire rope is guided through at least two first guide pulley blocks, one of the first guide pulley blocks is arranged on the deck, and the other first guide pulley block is arranged on the side plate of the hull.

[0011] In some possible implementations, the first traction mechanism is a double-drum winch or two single-drum winches, the first steel wire rope is provided in two, the first guide pulley block is provided in two, the first traction mechanism is used to pull the two first steel wire ropes, the two first guide pulley blocks are arranged correspondingly to the two first steel wire ropes, and the two first steel wire ropes are correspondingly connected to the two first lifting points of the equipment, the two first lifting points are located on opposite sides of the equipment along a direction parallel to the hull.

[0012] In some possible implementations, the traction device comprises a second traction mechanism, the traction rope comprises a second steel wire rope, the guide mechanism comprises a second guide pulley block, the second steel wire rope is guided through the second guide pulley block to connect the second traction mechanism and a second lifting point of the equipment to form an oblique pulling force on the equipment towards the outside of the hull.

[0013] In some possible implementations, the second lifting point is located on a side of the equipment away from the hull.

[0014] In some possible implementations, the second guide pulley block is arranged on the top of the A-shaped hanger.

[0015] In some possible implementations, a buffer pad is arranged on the side plate of the hull.

[0016] In some possible implementations, the monitoring device comprises a tension sensor and a controller, the tension sensor is used to detect the tension of the traction rope, and the controller is communicatively connected to the tension sensor and the traction device respectively to adjust the pulling speed and the tension of the traction rope by the traction device.

[0017] A method for damping oscillation of an A-shaped hanger, the method comprises the following steps:

[0018] An initial tension threshold of a traction device is preset, the traction device pulls a traction rope;

[0019] During the process of pulling the device, the monitoring device adjusts the speed and tension of the traction device to the traction rope, ensuring that the device moves along the preset trajectory.

[0020] The beneficial effects of the present application are:

[0021] The A-type hanger's anti-swing system and method provided by the present application provide power for the traction rope through the traction device, and the guide mechanism guides the traction rope to the preset direction. During the process of hoisting the device by the device, the traction rope provides an inclined tension to the side of the corresponding direction of the hull, and the monitoring device monitors the state of the traction rope, dynamically adjusts the speed and tension of the traction device to the traction rope, dynamically balances the longitudinal and transverse components of the device during the long-distance hoisting process, prevents the device from swinging or shaking due to inertia, and realizes tension balance. When the A-type hanger's anti-swing system is applied to the high freeboard scene, the problem of swinging of the hoisted device of the A-type hanger is solved. Further, the swinging of the device is avoided, which increases the risk of collision with the hull, especially in severe sea conditions, which may cause damage to the device or personnel casualties, and improves the operation safety. In addition, frequent suspension of operation for manual adjustment of the device posture is not required, the operation cycle is shortened, and the efficient operation demand of the offshore platform is met. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the front view of the A-type hanger's anti-swing system provided by the embodiment of the present application;

[0023] Figure 2 is the A-type side view of the A-type hanger's anti-swing system provided by the embodiment of the present application;

[0024] Figure 3 is the flowchart of the A-type hanger's anti-swing method provided by the embodiment of the present application.

[0025] In the figure:

[0026] 100, deck; 200, A-type hanger; 300, hoisting device; 400, device; 410, first lifting point; 420, second lifting point; 500, side plate; 600, waterline; 1, traction device; 11, first traction mechanism; 12, second traction mechanism; 2, traction rope; 21, first steel wire rope; 22, second steel wire rope; 3, guide mechanism; 31, first guide pulley block; 32, second guide pulley block; 4, buffer pad. DETAILED DESCRIPTION

[0027] In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present application will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0028] In the description of the present application, unless explicitly defined and limited otherwise, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] In the present application, unless explicitly defined and limited otherwise, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0030] As shown in Figure 1 and Figure 2 The present embodiment provides a sway control system of an A-type hanger. The A-type hanger 200 is arranged on a deck 100 of a ship body. A hoisting device 300 is arranged on the A-type hanger 200, and the hoisting device 300 is used for hoisting a device 400. The sway control system comprises a traction device 1, a guide mechanism 3 and a monitoring device. The traction device 1 is arranged on the deck 100 and is used for traction of a traction rope 2. The guide mechanism 3 is arranged on the ship body, and the traction rope 2 is guided through the guide mechanism 3 to connect the traction device 1 and the device 400. The traction rope 2 is connected to a hoisting point of the device 400 to form a diagonal pulling force to the side of the ship body. The monitoring device is in communication connection with the traction rope 2 and the traction device 1. The monitoring device is used for adjusting the speed and the pulling force of the traction device 1 to the traction rope 2.

[0031] The traction device 1 provides power for the traction rope 2, and the guide mechanism 3 guides the traction rope 2 to the preset direction. During the lifting of the equipment 400 by the hoisting device 300, the traction rope 2 provides the equipment 400 with a lateral pulling force in the direction of the corresponding side of the hull, and the state of the traction rope 2 is monitored according to the monitoring device, and the speed and tension of the traction rope 2 are dynamically adjusted by the traction device 1, so as to dynamically balance the longitudinal and transverse components of the equipment 400 during long-distance lifting, prevent the equipment 400 from swinging or shaking due to inertia, and realize tension balance. When the anti-swing system of the A-shaped hanger is applied to the high freeboard scene, the problem of swinging of the equipment 400 lifted by the A-shaped hanger 200 is solved. Further, the swinging of the equipment 400 is avoided, which increases the risk of collision with the hull, especially in severe sea conditions, which may cause damage to the equipment 400 or personnel injury, and the operation safety is improved. In addition, the operation cycle is shortened without frequent suspension of operation for manual adjustment of the attitude of the equipment 400, thereby meeting the efficient operation demand of the offshore platform.

[0032] The traction device 1 includes a first traction mechanism 11, the traction rope 2 includes a first steel wire rope 21, and the guide mechanism 3 includes a first guide pulley block 31. The first steel wire rope 21 is guided by the first guide pulley block 31 to connect the first traction mechanism 11 and a first lifting point 410 of the equipment 400, and the first lifting point 410 is located on one side of the equipment 400 in the direction parallel to the hull, so as to form a lateral pulling force of the equipment 400 to the inside of the hull and the side of the first lifting point 410. Exemplarily, the A-shaped hanger 200 is installed at the stern of the ship as an example, the longitudinal direction of the ship is the front-back direction, the transverse direction of the ship is the left-right direction, and the first lifting point 410 is located on the left side (or the right side) of the equipment 400. Specifically, the first lifting point 410 is located on the left side (or the right side) of the equipment 400 itself, or the lifting point connected between the hoisting device 300 and the equipment 400 is a hoisting lifting point, and the first lifting point 410 is located on the left side (or the right side) of the hoisting lifting point. The first guide pulley block 31 guides the first steel wire rope 21 to be connected with the first lifting point 410, the first traction mechanism 11 provides traction for the first steel wire rope 21, the first steel wire rope 21 provides a lateral pulling force to the inside of the hull and the left side (or the right side) of the equipment 400, and the swinging of the equipment 400 to the outside and the left side (or the right side) due to inertia is inhibited, respectively. Thus, the longitudinal and transverse components of the equipment 400 during long-distance lifting are dynamically balanced by the first steel wire rope 21, the swinging or shaking of the equipment 400 due to inertia is prevented, and tension balance is achieved.

[0033] The first traction mechanism 11 is a double-drum winch or two single-drum winches, the first steel wire rope 21 is provided with two, the first guide pulley block 31 is provided with two, the first traction mechanism 11 is used to pull the two first steel wire ropes 21, the two first guide pulley blocks 31 are correspondingly arranged with the two first steel wire ropes 21, the two first steel wire ropes 21 are correspondingly connected with the two first lifting points 410 of the equipment 400, and the two first lifting points 410 are located on opposite sides of the equipment 400 in the direction parallel to the ship body, that is, the two first lifting points 410 are respectively located on the left side and the right side of the equipment 400. The two first guide pulley blocks 31 guide the corresponding first steel wire ropes 21 to the left first lifting point 410 and the right first lifting point 410 respectively. The two first traction mechanisms 11 provide traction force to the two first steel wire ropes 21 correspondingly, and the two first steel wire ropes 21 simultaneously provide the equipment 400 with oblique pulling force to the inside of the ship body and the left and right sides. By simultaneously applying constant pulling force to the inside of the ship body, the outward swing of the equipment 400 due to inertia is suppressed. By dynamically adjusting the pulling force of the two first steel wire ropes 21 to the left and right sides of the equipment 400, the left and right swings or shakes of the equipment 400 due to inertia are further prevented, and the pulling force balance effect is better.

[0034] The first steel wire rope 21 is guided through at least two first guide pulley blocks 31, one first guide pulley block 31 is arranged on the deck 100, and the other first guide pulley block 31 is arranged on the side plate 500 of the ship body. By increasing the number of first guide pulley blocks 31, the stability of the first steel wire rope 21 is improved. By adjusting the position of the first guide pulley block 31 located at the bottom of the side plate 500, the pulling direction of the first steel wire rope 21 on the equipment 400 after being connected with the equipment 400 can be adjusted, and the lower the position of the first guide pulley block 31, the greater the pulling force of the equipment 400 to the inside of the ship body. The first guide pulley block 31 located on the side plate 500 is located between the A-shaped hanger 200 and the waterline 600 in the vertical direction.

[0035] Exemplarily, as Figure 1 and Figure 2As shown, each first steel wire rope 21 is guided by at least four first guide pulley sets 31, the first first guide pulley set 31 is arranged on the edge of the deck 100, and the rest are arranged on the side plate 500, the second first guide pulley set 31 is arranged below the first first guide pulley set 31 to extend the first steel wire rope 21 in the vertical direction, the third first guide pulley set 31 is arranged on the left (or right) side of the second first guide pulley set 31 in the horizontal direction to extend the first steel wire rope 21 in the horizontal direction, and the fourth first guide pulley set 31 is arranged below the third guide pulley set to extend the first steel wire rope 21 in the vertical direction. According to the actual structure, a plurality of first guide pulley sets 31 are arranged at appropriate positions to smoothly connect the first steel wire rope 21 to the first traction mechanism 11 and the equipment 400. The two first steel wire ropes 21 drawn out by the double-drum winch or two single-drum winches are turned by the first guide pulley set, and then connected to the first lifting points 410 on the left and right sides of the equipment 400 through the three first guide pulley sets 31 arranged on the side plate 500, to form a diagonal tension force to the inside and left and right sides of the hull (parallel to the hull or the A-shaped hanger 200).

[0036] The traction device 1 comprises a second traction mechanism 12, the traction rope 2 comprises a second steel wire rope 22, the guide mechanism 3 comprises a second guide pulley set 32, and the second steel wire rope 22 is guided by the second guide pulley set 32 to connect the second traction mechanism 12 and the second lifting point 420 of the equipment 400, to form a diagonal tension force to the outside of the hull to the equipment 400, and to suppress the swing of the equipment 400 to the inside of the hull.

[0037] When the first traction mechanism 11 is arranged to apply a tension force to the inside of the hull to the equipment 400, the second traction mechanism 12 offsets the excessive inside-hull tension force of the first traction mechanism 11 through the second steel wire rope 22, to achieve dynamic balance of the tension force. Through the coordinated control of multiple steel wire ropes, the longitudinal and transverse components of the equipment 400 during long-distance hoisting are dynamically balanced, the swing of the A-shaped hanger 200 and the equipment 400 in the high-freeboard scene is solved, and the operation safety and efficiency are improved.

[0038] The second lifting point 420 is located on the side of the equipment 400 (the lifting point of the hoisting device 300 connected with the equipment 400) away from the hull. Specifically, the second lifting point 420 is located on the side of the equipment 400 away from the hull, or the lifting point of the hoisting device 300 connected with the equipment 400 is a lifting point, and the second lifting point 420 is located on the side of the lifting point away from the hull.

[0039] The second guide pulley set 32 is arranged at the top of the A-shaped hanger 200, and the second steel wire rope 22 is guided through the second guide pulley set 32, so that the second steel wire rope 22 can be connected to the second lifting point 420 and separated from the first steel wire rope 21 guided by the first guide pulley set 31 on the side plate 500, thereby preventing interference. Specifically, two second guide pulley sets 32 are arranged at the top of the A-shaped hanger 200 in the direction of the inside and outside of the hull. By increasing the number of second guide pulley sets 32, the stability of the second steel wire rope 22 is improved.

[0040] The monitoring device comprises a tension sensor for detecting the tension of the traction rope 2 and a controller in communication with the tension sensor and the traction device 1 respectively, to adjust the speed and tension of the traction rope 2 of the traction device 1. The tension of the traction rope 2 is monitored and controlled in real time by the tension sensor and the controller. The tension of the traction rope 2 is fed back in real time by the tension sensor, and the controller automatically adjusts the torque of the traction device 1, i.e. by adjusting the speed and tension of the traction rope 2, to ensure that the movement trajectory of the equipment 400 is approximately a vertical line.

[0041] The side plate 500 of the hull is provided with a buffer pad 4. At least one rubber buffer pad 4 is arranged along the lower side of the hull. In the process of recovering and lifting, if the anti-sway system fails or the ship equipment 400 is shaken too much due to sudden strong winds and other bad weather, the buffer pad 4 can absorb and buffer the impact force, reduce the amplitude of shaking, and ensure safety.

[0042] As shown in Figures 1-3 The present embodiment also provides an anti-sway method of an A-shaped hanger, which adopts the anti-sway system of the A-shaped hanger as described above. The anti-sway method of the A-shaped hanger comprises the following steps:

[0043] S100, initially, an initial tension threshold of the traction device 1 is preset, and the traction device 1 pulls the traction rope 2; for example, according to the weight of the equipment 400 and the sea state parameters, the initial tension threshold is set.

[0044] S200, during the process of lowering or recovering the equipment 400, the monitoring device adjusts the speed and tension of the traction rope 2 of the traction device 1, to ensure that the equipment 400 moves along the preset movement trajectory, i.e. to ensure that the equipment 400 moves along an approximately vertical line.

[0045] When the traction device 1 comprises the first traction mechanism 11 and the second traction mechanism 12 simultaneously, the guide mechanism 3 comprises the first guide pulley set 31 and the second guide pulley set 32 simultaneously, and the traction rope 2 comprises two first steel ropes 21 and one second steel rope 22. The step S100 specifically comprises: the first traction mechanism 11 synchronously releases the first steel rope 21, while applying a constant pulling force inward to the device 400 (dynamically adjusted according to the weight of the device 400), and inhibiting the outward swing of the device 400 due to inertia. The second traction mechanism 12 synchronously releases the second steel rope 22, and applies a force to the device 400 through the top second guide pulley set 32, which is directed outward to the ship body, counteracts the excessive pulling force of the two first steel ropes 21 in the direction of the ship body, and realizes dynamic balance of the pulling force.

[0046] Specifically, the monitoring device comprises a tension sensor and a controller, which adjusts the traction device 1 according to the pulling force of the traction rope 2 fed back by the tension sensor. The step S200 specifically comprises: the tension sensor feeds back the pulling force of the two first steel ropes 21 and the one second steel rope 22 in real time, and the controller automatically adjusts the torque of the first traction mechanism 11 and the second traction mechanism 12, so as to ensure that the motion trajectory of the device 400 is an approximately vertical line.

[0047] Further, the anti-swing system further comprises a device for detecting the swing amplitude of the device 400. Specifically, referring to the prior art: when it is detected that the swing amplitude of the device 400 exceeds the limit, the emergency locking mechanism of the traction device 1 is triggered to realize emergency braking and improve safety. Exemplarily, the device for monitoring the swing amplitude of the device 400 is a visual monitoring system (camera + image recognition), which transmits pictures in real time through the camera, and the swing amplitude can be directly judged by the operator, so that the traction device 1 can be manually triggered in time.

[0048] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the implementation modes are not required or can not be exhausted. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. An anti-sway system for an A-type hanger, wherein the A-type hanger (200) is arranged on a deck (100) of a ship, and a lifting device (300) is provided on the A-type hanger (200), and the lifting device (300) is used to lift equipment (400); characterized in that: The anti-sway system includes: A traction device (1) is provided on the deck (100) and is used for pulling a traction rope (2); A guide mechanism (3) is provided on the hull, the traction rope (2) is guided by the guide mechanism (3) to connect the traction device (1) and the equipment (400), and the traction rope (2) is connected to the hanging point of the equipment (400) to form an oblique pulling force on the equipment (400) toward the side of the hull; A monitoring device is connected to the traction rope (2) and the traction device (1) for communication, and the monitoring device is used to adjust the retraction and extension speed and tension of the traction rope (2) by the traction device (1).

2. The anti-sway system of the A-type hanger according to claim 1, characterized in that: The traction device (1) includes a first traction mechanism (11), the traction rope (2) includes a first steel wire rope (21), and the guide mechanism (3) includes a first guide pulley group (31). The first steel wire rope (21) is guided by the first guide pulley group (31) to connect the first traction mechanism (11) and a first suspension point (410) of the device (400). The first suspension point (410) is located on one side of the device (400) parallel to the direction of the hull, so as to form an oblique pulling force on the device (400) toward the inner side of the hull and the side of the first suspension point (410).

3. The anti-sway system of the A-type hanger according to claim 2, characterized in that: The first steel wire rope (21) is guided by at least two first guide pulley sets (31), one of the first guide pulley sets (31) is arranged on the deck (100), and the other first guide pulley set (31) is arranged on the side plate (500) of the hull.

4. The anti-sway system of the A-type hanger according to claim 2, characterized in that: The first traction mechanism (11) is a double-drum winch or two single-drum winches, two first steel ropes (21) are provided, and two first guide pulley groups (31) are provided. The first traction mechanism (11) is used to pull the two first steel ropes (21), and the two first guide pulley groups (31) are correspondingly arranged with the two first steel ropes (21). The two first steel ropes (21) are correspondingly connected to the two first hanging points (410) of the device (400), and the two first hanging points (410) are located on opposite sides of the device (400) along a direction parallel to the hull.

5. The anti-sway system of the A-type hanger according to claim 1, characterized in that: The traction device (1) includes a second traction mechanism (12), the traction rope (2) includes a second steel wire rope (22), and the guide mechanism (3) includes a second guide pulley group (32). The second steel wire rope (22) is guided by the second guide pulley group (32) to connect the second traction mechanism (12) and the second suspension point (420) of the equipment (400) to form an oblique pulling force on the equipment (400) toward the outside of the hull.

6. The anti-sway system of the A-type hanger according to claim 5, characterized in that: The second suspension point (420) is located on a side of the device (400) facing away from the hull.

7. The anti-sway system of the A-type hanger according to claim 5, characterized in that: The second guide pulley assembly (32) is arranged on the top of the A-type hanger (200).

8. The anti-sway system of the A-type hanger according to claim 1, characterized in that: A buffer pad (4) is provided on the side plate (500) of the hull.

9. The anti-sway system of the A-type hanger according to claim 1, characterized in that: The monitoring device comprises a tension sensor and a controller, wherein the tension sensor is used to detect the tension of the traction rope (2), and the controller is respectively connected to the tension sensor and the traction device (1) for communication, so as to adjust the retraction speed and tension of the traction rope (2) by the traction device (1).

10. A method for preventing swing of an A-type hanger, characterized in that: The anti-sway system of the A-type hanger according to any one of claims 1 to 9 is used, and the anti-sway method of the A-type hanger includes: Initially, an initial tension threshold of the traction device (1) is preset, and the traction device (1) pulls the traction rope (2); During the process of pulling the device (400), the monitoring device adjusts the retraction and extension speed and the pulling force of the pulling device (1) on the pulling rope (2) to ensure that the device (400) moves according to a preset motion trajectory.

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