Cable laying boat lifeboat suspension structure and use method thereof

Abstract

The invention relates to the technical field of boat hanging frames, and discloses a cable laying boat lifeboat hanging structure and a using method thereof.The cable laying boat lifeboat hanging structure comprises an inverted arm type boat hanging frame, two connecting blocks are fixedly connected to the bottom of the inverted arm type boat hanging frame, parts contained in the inner walls and the outer walls of the two connecting blocks are the same, and brake rods are rotationally connected to the inner walls of the connecting blocks; an operator rotates a brake rod to reduce the friction force borne by a brake disc, so that a twisted rope winding drum can rotate, the lifeboat falls under the influence of self weight, a hanging cable is pulled to move, the twisted rope winding drum rotates clockwise, an extrusion block is driven to rotate through a one-way assembly, hydraulic oil in a hydraulic cavity is extruded, and the hydraulic oil in the hydraulic cavity is extruded; the extrusion block bears large resistance during rotation, so that the lifeboat slowly falls, and the situations that the amplitude of loosening the brake rod is too large, so that the resistance borne by the lifeboat is small, the lifeboat rapidly falls due to the influence of self weight, and the lifeboat stably falls to the sea surface due to large swing amplitude during falling are effectively prevented.

Description

Technical Field

[0001] This invention relates to the field of davit equipment technology, specifically to a suspension structure for a cable-laying lifeboat and its usage method. Background Technology

[0002] Lifeboats are small boats used by crew members to escape when a ship is in distress. They are equipped on large ships. The suspension structure of lifeboats is crucial to ensuring the safety of maritime operations. It needs to be able to stably store, quickly lower and lower, and safely recover lifeboats in complex sea conditions. The common release method is to store the lifeboat on the deck rails or brackets on the side of the ship. The davit consists of two curved booms and is connected to the lifeboat through a pulley system and winch system. Its core feature is that it uses the lifeboat's own weight as the power for lowering and lowering.

[0003] When a gravity-assisted inverted boom davit descends to the sea surface under the weight of the lifeboat, the descent speed is often adjusted by manually controlling the degree of brake release. When the brake is released, a large initial force is required due to the tightness of the brake. After the brake is released, due to inertia, the operator may still maintain a large force, which may result in the brake being released too much. This reduces the resistance to the lifeboat and may cause the lifeboat to fall rapidly, affecting the stability of the descent. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a suspension structure for a cable-laying boat lifeboat, including an inverted boom davit frame. Two connecting blocks are fixedly connected to the bottom of the inverted boom davit frame. The inner and outer walls of the two connecting blocks contain the same parts. A brake rod is rotatably connected to the inner wall of the connecting block, and a pin is slidably connected to the inner wall of the connecting block. The outer wall of the pin is slidably connected to the inner wall of the brake rod. The davit mechanism is rotatably mounted on the inner wall of the connecting block and is used to release the lifeboat. The extrusion mechanism is slidably disposed on the inner wall of the connecting block and is used to extrude liquid media; The deceleration mechanism is located on the inner wall of the connecting block and is used to slow down the descent speed of the lifeboat. In operation, the operator turns the brake lever to release the davit mechanism from the lifeboat, and then lowers the lifeboat using the inverted boom davit. During the descent, the lifeboat is lowered slowly by a compression mechanism and a deceleration mechanism.

[0005] Preferably, the davit mechanism includes: The cable assembly is rotatably mounted on the inner wall of the connecting block via a rotating component. The rotating component includes a rotating rod rotatably connected to the inner wall of the connecting block, and a motor is fixedly connected to the side wall of the connecting block; Brake assembly, the brake assembly is fixedly mounted on the outer wall of the rotating rod by a fastener; The fasteners include a brake disc fixedly connected to the outer wall of the rotating rod, and a clamp fixedly connected to the inner wall of the connecting block; When the brake lever is turned, the friction between the brake assembly and the cable assembly is reduced, and the lifeboat, under its own weight, will fall.

[0006] Preferably, the extrusion mechanism includes: The push component is fixedly connected to the outer wall of the brake lever via a connector; The connector includes an inclined push frame fixedly connected to the outer wall of the brake lever, and a hydraulic cavity is provided on the inner wall of the connector block; A flow guiding component is slidably disposed on the inner wall of the hydraulic chamber; When the brake lever rotates, it drives the inclined plane pusher to rotate, causing the inclined plane pusher to squeeze and push the component to move.

[0007] Preferably, the mitigation mechanism includes: A rotating assembly is rotatably mounted on the outer wall of the rotating rod via a support member. The support includes a rotating ring rotatably connected to the outer wall of the rotating rod; A one-way component, which is slidably disposed on the inner wall of the rotating rod; As the lifeboat descends, a rotating rod rotates, causing a one-way component to rotate, which in turn increases the drag of the lifeboat's descent.

[0008] Preferably, the cable assembly includes a rope drum disposed on the front of the connecting block, the side wall of the rope drum being fixedly connected to the side wall of the rotating rod, and a one-way clutch being disposed on the back of the connecting block. The output end sidewall of the motor is fixedly connected to the sidewall of the one-way clutch, and the side of the rotating rod away from the rope drum is fixedly connected to the side of the one-way clutch away from the motor. Two rotating rings are fixedly connected to the outer wall of the rotating rod, and two stationary rings are fixedly connected to the inner wall of the connecting block. The rotating rings and stationary rings can be combined to form a mechanical seal to ensure that the liquid medium in the hydraulic chamber is difficult to leak when the rotating rod rotates. The motor is started to rotate the one-way clutch, which in turn drives the rotating rod and the rope drum to rotate. The one-way clutch ensures that the motor can only drive the rotating rod to rotate in one direction.

[0009] Preferably, the brake assembly includes a ramp block fixedly connected to the outer wall of the brake lever, a spring friction plate slidably connected to the inner wall of the caliper, the outer wall of the ramp block being rotatably connected to the inner wall of the connecting block, and the outer wall of the brake disc being rotatably connected to the inner wall of the caliper. The inverted boom davit is installed on the hull of the cable-laying vessel. When a lifeboat needs to be released, the operator opens the lifeboat's safety lock and the brake or fixing clamp in the inverted boom davit. Then, the lifeboat will fall due to its own weight. During the fall, the movable boom in the inverted boom davit will rotate, causing the movable boom to tilt and change the position of the lifeboat, making the lifeboat hang on the sea surface. Then, the operator pulls the pin to separate from the brake lever, releasing the fixation of the brake lever. Then, the brake lever is rotated, causing the inclined block to rotate, allowing the inclined surface of the inclined block to separate from the spring friction plate. Since the spring of the spring friction plate was previously in a compressed state, at this time, the spring friction plate will release some of the rebound force, allowing the spring friction plate to come into contact with the inclined surface of the inclined block again. At this point, the pressure exerted by the inclined block on the spring friction plate decreases, which in turn reduces the pressure exerted by the spring friction plate on the brake disc, reducing the friction on the brake disc. Therefore, the brake disc, rotating rod, and winch drum can rotate. At this time, the lifeboat, under its own weight, will fall, simultaneously pulling the hoisting cable in the boom davit downwards. When the hoisting cable is pulled, the tension of the hoisting cable is transmitted to the winch drum, causing the winch drum to rotate clockwise. Due to the presence of the one-way clutch, the motor can only drive the rotating rod to rotate counterclockwise through the one-way clutch. When the winch drum rotates clockwise, it will drive the rotating rod and the one-way clutch to rotate, causing the inner and outer rings of the one-way clutch to disengage and unable to transmit power. Therefore, the winch drum can rotate smoothly.

[0010] Preferably, the pushing component includes a spring rod slidably connected to the inner wall of the connecting block, and hydraulic oil is provided on the inner wall of the hydraulic chamber; The flow guiding assembly includes an annular block fixedly connected to the inner wall of the hydraulic chamber, a piston plate slidably connected to the outer wall of the annular block, and the side wall of the piston plate fixedly connected to the side wall of the spring rod. Several arc-shaped grooves are provided on the inner wall of the annular block. The outer wall of the piston plate is slidably connected to the inner wall of the hydraulic chamber. Both the inner and outer walls of the piston plate are fixedly connected with sealing rings to prevent hydraulic oil leakage. When the operator turns the brake lever, a large initial force is applied. Due to inertia, the brake lever rotates at a large angle, causing the frictional resistance on the brake disc to decrease rapidly. As the lifeboat descends quickly, the rotation of the brake lever also drives the inclined plane pusher to rotate. The inclined plane of the pusher contacts the spring rod, squeezing the spring rod and moving it away from the winch drum. This allows the spring rod to accumulate rebound force, which in turn drives the piston plate to move. Since the hydraulic chamber is not completely filled with hydraulic oil, the piston plate squeezes the hydraulic oil, which then moves towards the rotating ring through the arc groove.

[0011] Preferably, the rotating assembly includes six extrusion blocks rotatably connected to the inner wall of the hydraulic chamber. The side of each of the six extrusion blocks closest to the rotating rod is fixedly connected to the outer wall of the rotating ring. Each of the six extrusion blocks has a flow divider groove on its inner wall. As the inclined plane pusher continues to rotate, when the inclined plane of the pusher separates from the spring rod, it will squeeze the piston plate and the annular block to fit together, pushing all the hydraulic oil between the annular block and the piston plate towards the rotating ring, so that more hydraulic oil comes into contact with the extrusion block and the rotating ring. When the rotating rod rotates, the rotating ring is rotated through the one-way component, thereby driving the extrusion block to rotate, allowing the hydraulic oil to flow in the diversion groove, increasing the rotational resistance of the extrusion block.

[0012] Preferably, the unidirectional component includes six inclined grooves formed on the inner wall of the rotating ring, six spring push blocks are slidably connected to the inner wall of the rotating rod, and the outer walls of the six spring push blocks are slidably connected to the inner wall of the inclined grooves. When the rotating rod rotates, it drives the spring-driven block to rotate, causing the spring-driven block to contact the vertical edge of the inclined groove. This, in turn, drives the rotating ring to rotate, which in turn drives the squeezing block to rotate. As the squeezing block rotates, it squeezes the hydraulic oil in the hydraulic chamber, causing the hydraulic oil to flow in the diversion groove. Because the diversion groove has multiple branch channels, it changes the flow direction of the hydraulic oil multiple times, thereby increasing the flow resistance of the hydraulic oil. This causes the squeezing block to experience greater resistance when rotating, thus slowing down the rotation speed of the squeezing block and the rotating ring. This slows down the rotation speed of the rotating rod and the winch drum. The slower rotation speed of the winch drum slows down the release speed of the hoisting cable, thereby slowing down the descent speed of the lifeboat and making it descend slowly. This effectively prevents the brake lever from suddenly releasing a large amount of force, reducing the friction on the brake disc and the resistance on the lifeboat. The lifeboat, under its own weight, will fall quickly, causing a large swing amplitude during the descent. During the swing, it may collide with the cable-laying vessel, thus allowing the lifeboat to descend smoothly to the sea surface.

[0013] A method for using a cable-stayed lifeboat suspension structure includes the following steps: S1: Release preparation: Install the inverted boom davit at the side of the cable-laying vessel. When it is necessary to release the lifeboat, the operator opens the lifeboat's safety lock and the brake or fixing clamp in the inverted boom davit. S2: Falling due to its own weight: The lifeboat will fall due to its own weight. During the falling process, it will drive the movable boom in the inverted boom davit to rotate, causing the movable boom to tilt and change the position of the lifeboat, so that the lifeboat is suspended on the sea surface. S3: Brake Disengagement: The operator pulls the pin to disengage from the brake lever, releasing the brake lever from its fixation. Then, the brake lever is rotated, causing the inclined block to rotate, reducing the friction on the brake disc and allowing the lifeboat to descend smoothly.

[0014] The present invention has the following beneficial effects: (1) When using this invention, when it is necessary to release the lifeboat, the operator rotates the brake lever to reduce the friction on the brake disc. Therefore, the brake disc, rotating lever, and winch drum can rotate. At this time, the lifeboat will fall due to its own weight. At the same time, the hoisting cable is pulled to move, thereby causing the winch drum to rotate clockwise. When the brake lever rotates, the piston plate squeezes the hydraulic oil through the flow guiding component, so that more hydraulic oil comes into contact with the squeezing block and the rotating ring. When the rotating lever rotates, the squeezing block will be driven to rotate through the one-way component, which will squeeze the hydraulic oil in the hydraulic chamber. The hydraulic oil flows within the distribution channel. Because the distribution channel has multiple branch channels, the flow direction of the hydraulic oil changes multiple times, thereby increasing the flow resistance of the hydraulic oil. When the extrusion block rotates, it encounters greater resistance, which slows down the rotation speed of the winch drum, allowing the lifeboat to descend slowly. This effectively prevents a sudden increase in the amplitude of releasing the brake lever. The lifeboat experiences less resistance, and due to its own weight, it will fall quickly, causing a large swing amplitude during the descent. During the swing, it may collide with the cable-laying vessel, thus allowing the lifeboat to descend smoothly to the sea surface.

[0015] (2) When the piston plate squeezes the hydraulic oil to flow, the hydraulic oil will enter the arc groove, causing the hydraulic oil to be divided into two streams. As the hydraulic oil continues to flow, the two streams of hydraulic oil will collide with each other at the outlet of the arc groove, thereby consuming the kinetic energy of the hydraulic oil and slowing down the flow speed of the hydraulic oil. This will increase the resistance of the piston plate movement, requiring the inclined push frame to apply a greater force to squeeze the spring rod to move, thereby increasing the rotational resistance of the brake rod. This will reduce the distance the brake rod rotates due to inertia, effectively preventing the operator from rotating the brake rod too forcefully due to inertia, which would cause the brake rod to rotate too much at once. This makes it easier to adjust the force applied to the brake rod, thereby making it easier to control the rotation angle of the brake rod.

[0016] (3) By precisely controlling the rotation angle of the brake lever, the operator can adjust the rotation angle of the brake lever to the correct position at a faster speed. When a major accident occurs on the cable-laying vessel and a lifeboat is needed, the operator can quickly turn the brake lever to the correct position, reducing the adjustment time of the brake lever. This effectively prevents the difficulty in adjusting the brake lever and the pressure on the brake disc when rotating the brake lever, which would otherwise require multiple adjustments and increase the operator's escape time.

[0017] (4) When the rotating rod rotates clockwise, it drives the spring push block to rotate, which in turn drives the rotating ring to rotate. When the lifeboat needs to be released during an escape drill, and the lifeboat needs to be re-suspended after the release, the motor drives the one-way clutch to rotate counterclockwise, which drives the rotating rod and the winch drum to rotate counterclockwise, so that the winch drum can wind up the cable and pull the lifeboat up. When the rotating rod rotates counterclockwise, the spring push block will be squeezed down by the inclined surface of the inclined groove until the spring push block separates from the inclined groove, so that the rotating rod can rotate smoothly. This effectively prevents the hydraulic resistance of the squeeze block from being transmitted to the rotating rod when the lifeboat is raised during the lifeboat release drill and the winch drum is started to wind up the cable, increasing the rotational resistance of the winch drum. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional schematic diagram of the inverted boom davit of the present invention; Figure 3 This is a schematic diagram of the left cross-section of the connecting block of the present invention; Figure 4 This is a schematic diagram of the left-side cross-sectional view of the brake disc of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 This is a schematic diagram of the left cross-section of the annular block of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle; Figure 8 This is a cross-sectional schematic diagram of the extrusion block of the present invention; Figure 9 For the present invention Figure 8 Enlarged view of point C in the middle; Figure 10 This is a schematic diagram of the left-side structure of the inclined block of the present invention; Figure 11 This is a schematic diagram of the workflow of the present invention.

[0020] The attached diagram lists the components represented by each number as follows: In the diagram: 1. Davit mechanism; 11. Cable assembly; 12. Brake assembly; 13. Inverted boom davit frame; 14. Connecting block; 15. Brake lever; 16. Pin; 111. Rotating rod; 112. Rope reel drum; 113. Motor; 114. One-way clutch; 121. Brake disc; 122. Clamp; 123. Inclined block; 124. Spring friction plate; 2. Extrusion mechanism; 21. Pushing assembly; 22. Flow guiding assembly; 211. Hydraulic chamber; 212. Inclined push frame; 213. Spring rod; 221. Annular block; 222. Piston plate; 223. Arc groove; 3. Slowing mechanism; 31. Rotating assembly; 32. One-way assembly; 311. Rotating ring; 312. Extrusion block; 313. Diverting groove; 321. Inclined groove; 322. Spring push block. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described 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.

[0022] Example 1, please refer to Figure 1 - Figure 8 The present invention is a suspension structure for a cable-laying boat lifeboat, including an inverted boom davit 13. Two connecting blocks 14 are fixedly connected to the bottom of the inverted boom davit 13. The inner and outer walls of the two connecting blocks 14 contain the same parts. A brake rod 15 is rotatably connected to the inner wall of the connecting block 14. A pin 16 is slidably connected to the inner wall of the connecting block 14. The outer wall of the pin 16 is slidably connected to the inner wall of the brake rod 15. The davit mechanism 1 is rotatably mounted on the inner wall of the connecting block 14 and is used to release the lifeboat. The extrusion mechanism 2 is slidably disposed on the inner wall of the connecting block 14 and is used to extrude liquid medium. The deceleration mechanism 3 is rotatably installed on the inner wall of the connecting block 14 to slow down the descent speed of the lifeboat. In use, the operator rotates the brake lever 15 to release the lifeboat from the davit mechanism 1, and then lowers the lifeboat through the inverted boom davit frame 13. During the descent, the lifeboat is lowered slowly by the squeezing mechanism 2 and the deceleration mechanism 3.

[0023] The davit mechanism 1 includes: Cable assembly 11 is rotatably mounted on the inner wall of connecting block 14 via a rotating component; The rotating component includes a rotating rod 111 rotatably connected to the inner wall of the connecting block 14, and a motor 113 is fixedly connected to the side wall of the connecting block 14. Brake assembly 12 is fixedly mounted on the outer wall of rotating rod 111 by a fastener. The fasteners include a brake disc 121 fixedly connected to the outer wall of the rotating rod 111, and a clamp 122 fixedly connected to the inner wall of the connecting block 14; When the brake lever 15 is turned, the friction between the brake assembly 12 and the cable assembly 11 is reduced, and the lifeboat will fall due to its own weight.

[0024] The extrusion mechanism 2 includes: Push component 21 is fixedly connected to the outer wall of brake lever 15 via a connector; The connector includes an inclined pusher 212 fixedly connected to the outer wall of the brake lever 15, and a hydraulic cavity 211 is provided on the inner wall of the connecting block 14; The flow guiding component 22 is slidably disposed on the inner wall of the hydraulic chamber 211; When the brake lever 15 rotates, it will drive the inclined plane pusher 212 to rotate, causing the inclined plane pusher 212 to press and push the pusher 21 to move.

[0025] Mitigation mechanism 3 includes: Rotating assembly 31 is rotatably mounted on the outer wall of rotating rod 111 via a support member; The support includes a rotating ring 311 that is rotatably connected to the outer wall of the rotating rod 111; One-way component 32 is slidably disposed on the inner wall of rotating rod 111; When the lifeboat is falling, the rotating rod 111 will rotate, which will drive the one-way component 32 to rotate, thereby causing the rotating component 31 to rotate, increasing the falling resistance of the lifeboat.

[0026] Example 2, please refer to Figure 2 - Figure 11 The present invention is a suspension structure for a cable-laying boat lifeboat. Based on the first embodiment, the cable assembly 11 includes a rope drum 112 disposed on the front of the connecting block 14. The side wall of the rope drum 112 is fixedly connected to the side wall of the rotating rod 111. A one-way clutch 114 is disposed on the back of the connecting block 14. The output end sidewall of motor 113 is fixedly connected to the sidewall of one-way clutch 114, and the side of rotating rod 111 away from rope drum 112 is fixedly connected to the side of one-way clutch 114 away from motor 113. Two moving rings are fixedly connected to the outer wall of the rotating rod 111, and two stationary rings are fixedly connected to the inner wall of the connecting block 14, as shown below. Figure 7 As shown in position I, the rotating ring and the stationary ring can be combined to form a mechanical seal, ensuring that the liquid medium in the hydraulic chamber 211 is difficult to leak when the rotating rod 111 rotates; Specifically, by starting the motor 113, the one-way clutch 114 is rotated, which drives the rotating rod 111 and the rope drum 112 to rotate. The one-way clutch 114 ensures that the motor 113 can only drive the rotating rod 111 to rotate in one direction.

[0027] The brake assembly 12 includes a ramp block 123 fixedly connected to the outer wall of the brake lever 15, a spring friction plate 124 slidably connected to the inner wall of the caliper 122, the outer wall of the ramp block 123 being rotatably connected to the inner wall of the connecting block 14, and the outer wall of the brake disc 121 being rotatably connected to the inner wall of the caliper 122. The inverted boom davit 13 is installed on the hull of the cable-laying vessel. When a lifeboat needs to be released, the operator releases the lifeboat's safety lock and the brake or fixing clamp in the inverted boom davit 13. The lifeboat then falls under its own weight, causing the movable boom in the inverted boom davit 13 to rotate. Figure 1 As shown in position F, tilt the boom to change the position of the lifeboat, making it suspend on the sea surface. Then, the operator pulls the pin 16 to separate it from the brake lever 15, releasing the fixation of the brake lever 15. Then, rotate the brake lever 15 to drive the inclined block 123 to rotate, causing the inclined surface of the inclined block 123 to separate from the spring friction plate 124. Since the spring of the spring friction plate 124 was previously in a compressed state, the spring friction plate 124 will release some of the rebound force at this time, causing the spring friction plate 124 to come into contact with the inclined surface of the inclined block 123 again. At this time, the pressure exerted by the inclined block 123 on the spring friction plate 124 decreases, thereby reducing the pressure exerted by the spring friction plate 124 on the brake disc 121 and reducing the frictional force on the brake disc 121. Therefore, the brake disc 121, the rotating rod 111, and the winch drum 112 can rotate. At this point, the lifeboat, under its own weight, will fall, simultaneously pulling the cable in the inverted boom davit 13 downwards. Figure 1 As shown in position G, when the cable is pulled, the tension of the cable is transmitted to the rope drum 112, causing the rope drum 112 to rotate clockwise. Due to the presence of the one-way clutch 114, the motor 113 can only drive the rotating rod 111 to rotate counterclockwise through the one-way clutch 114. When the rope drum 112 rotates clockwise, it will drive the rotating rod 111 and the one-way clutch 114 to rotate, so that the inner and outer rings of the one-way clutch 114 are disengaged and cannot transmit power. Therefore, the rope drum 112 can rotate smoothly.

[0028] The pushing component 21 includes a spring rod 213 that is slidably connected to the inner wall of the connecting block 14, and hydraulic oil is provided on the inner wall of the hydraulic chamber 211; The flow guiding assembly 22 includes an annular block 221 fixedly connected to the inner wall of the hydraulic chamber 211, a piston plate 222 slidably connected to the outer wall of the annular block 221, and the side wall of the piston plate 222 fixedly connected to the side wall of the spring rod 213. The inner wall of the annular block 221 is provided with several arc-shaped grooves 223. The outer wall of the piston plate 222 is slidably connected to the inner wall of the hydraulic chamber 211. Both the inner and outer walls of the piston plate 222 are fixedly connected with sealing rings to prevent hydraulic oil leakage. When the operator turns the brake lever 15, a large initial force is applied. Due to inertia, the brake lever 15 rotates at a large angle, causing the frictional resistance on the brake disc 121 to decrease rapidly. As the lifeboat descends rapidly, the rotation of the brake lever 15 also drives the inclined plane pusher 212 to rotate. The inclined plane of the inclined plane pusher 212 will contact the spring rod 213, squeezing the spring rod 213 to move away from the winch drum 112, allowing the spring rod 213 to accumulate rebound force. The spring rod 213 will drive the piston plate 222 to move. Since the hydraulic oil in the hydraulic chamber 211 is not completely filled, the piston plate 222 will squeeze the hydraulic oil, which will move towards the rotating ring 311 through the arc groove 223.

[0029] The rotating assembly 31 includes six extrusion blocks 312 rotatably connected to the inner wall of the hydraulic chamber 211. The side of each of the six extrusion blocks 312 near the rotating rod 111 is fixedly connected to the outer wall of the rotating ring 311. Each of the six extrusion blocks 312 has a flow divider groove 313 on its inner wall. As the inclined plane pusher 212 continues to rotate, when the inclined plane of the inclined plane pusher 212 separates from the spring rod 213, it will squeeze the piston plate 222 to fit with the annular block 221, pushing all the hydraulic oil between the annular block 221 and the piston plate 222 towards the rotating ring 311, so that more hydraulic oil comes into contact with the extrusion block 312 and the rotating ring 311. When the rotating rod 111 rotates, the rotating ring 311 is rotated through the one-way component 32, thereby driving the extrusion block 312 to rotate, allowing the hydraulic oil to flow in the diversion groove 313, increasing the rotational resistance of the extrusion block 312.

[0030] The one-way component 32 includes six inclined grooves 321 formed on the inner wall of the rotating ring 311, and six spring push blocks 322 are slidably connected to the inner wall of the rotating rod 111. The outer walls of the six spring push blocks 322 are all slidably connected to the inner wall of the inclined grooves 321. When the rotating rod 111 rotates, it drives the spring-driven block 322 to rotate, causing the spring-driven block 322 to contact the vertical edge of the inclined groove 321, such as... Figure 9As shown in the position of J, this drives the rotating ring 311 to rotate, which in turn drives the extrusion block 312 to rotate. When the extrusion block 312 rotates, it squeezes the hydraulic oil in the hydraulic chamber 211, causing the hydraulic oil to flow in the diversion groove 313. Since the diversion groove 313 has multiple branch channels, it will change the flow direction of the hydraulic oil multiple times, thereby increasing the flow resistance of the hydraulic oil. This causes the extrusion block 312 to experience greater resistance when rotating, thus slowing down the rotation speed of the extrusion block 312 and the rotating ring 311, and causing the rotating rod 11 to... The slower rotation speed of the heave drum 112 and the lower rotation speed of the heave drum 112 will slow down the release speed of the cable, thereby slowing down the descent speed of the lifeboat and making it fall slowly. This effectively prevents the brake lever 15 from being released suddenly to a large extent, reduces the friction force on the brake disc 121, and reduces the resistance on the lifeboat. The lifeboat will fall quickly due to its own weight, causing a large swing amplitude during the descent. During the swing, it may collide with the cable-laying vessel, thus making the lifeboat fall smoothly to the sea surface.

[0031] The number of the above components is not limited. Those skilled in the art can set it freely according to actual needs, as long as the above components are installed at the corresponding component connection positions.

[0032] The method of using this lifeboat suspension structure includes the following steps: S1: Release preparation: Install the inverted boom davit 13 on the side of the cable-laying vessel. When it is necessary to release the lifeboat, the operator opens the lifeboat's safety lock and the brake or fixing bolt clamp in the inverted boom davit 13. S2: Falling due to its own weight: The lifeboat will fall due to its own weight. During the falling process, it will drive the movable boom in the inverted boom davit 13 to rotate, causing the movable boom to tilt and change the position of the lifeboat, so that the lifeboat is suspended on the sea surface. S3: Brake disengagement: The operator pulls the pin 16 to separate it from the brake lever 15, thus removing the fixation on the brake lever 15. Then, the brake lever 15 is rotated, causing the inclined block 123 to rotate, reducing the friction on the brake disc 121 and allowing the lifeboat to fall smoothly.

[0033] A specific application of this embodiment is as follows: When using this invention, the inverted boom davit 13 is installed on the side of the cable-laying vessel. When it is necessary to release the lifeboat, the operator opens the lifeboat's safety lock and the brake or fixing clamp in the inverted boom davit 13. Then, the lifeboat, under its own weight, will fall. During the falling process, it will cause the movable boom in the inverted boom davit 13 to rotate. Figure 1As shown in position F, tilt the boom to change the position of the lifeboat, making it suspend on the sea surface. Then, the operator pulls the pin 16 to separate it from the brake lever 15, releasing the fixation of the brake lever 15. Then, rotate the brake lever 15 to drive the inclined block 123 to rotate, causing the inclined surface of the inclined block 123 to separate from the spring friction plate 124. Since the spring of the spring friction plate 124 was previously in a compressed state, the spring friction plate 124 will release some of the rebound force at this time, causing the spring friction plate 124 to come into contact with the inclined surface of the inclined block 123 again. At this time, the pressure exerted by the inclined block 123 on the spring friction plate 124 decreases, thereby reducing the pressure exerted by the spring friction plate 124 on the brake disc 121 and reducing the frictional force on the brake disc 121. Therefore, the brake disc 121, the rotating rod 111, and the winch drum 112 can rotate. At this point, the lifeboat, under its own weight, will fall, simultaneously pulling the cable in the inverted boom davit 13 downwards. Figure 1 As shown in position G, when the cable is pulled, the tension of the cable is transmitted to the rope drum 112, causing the rope drum 112 to rotate clockwise. Due to the presence of the one-way clutch 114, the motor 113 can only drive the rotating rod 111 to rotate counterclockwise through the one-way clutch 114. When the rope drum 112 rotates clockwise, it will drive the rotating rod 111 and the one-way clutch 114 to rotate, so that the inner and outer rings of the one-way clutch 114 are disengaged and cannot transmit power. Therefore, the rope drum 112 can rotate smoothly. Among them, the two moving rings on the outer wall of the rotating rod 111 and the two stationary rings on the inner wall of the connecting block 14 are connected by the two moving rings on the outer wall of the rotating rod 111. Figure 7 As shown in the positions of H and I, the dynamic ring and the stationary ring combine to form a mechanical seal, which effectively prevents hydraulic oil from leaking from the hydraulic chamber 211 when the rotating rod 111 rotates. When the operator turns the brake lever 15, a large initial force is applied. Due to inertia, the brake lever 15 rotates a large angle, causing the frictional resistance on the brake disc 121 to decrease rapidly, allowing the lifeboat to descend quickly. As the brake lever 15 rotates, it also drives the inclined plane pusher 212 to rotate. The inclined plane of the pusher 212 contacts the spring rod 213, compressing the spring rod 213 and moving it away from the rope drum 112. This allows the spring rod 213 to accumulate rebound force, which in turn drives the piston plate 222 to move. Since the hydraulic oil in the hydraulic chamber 211 is not completely filled, the piston plate 222 will squeeze the hydraulic oil. The hydraulic oil will move towards the rotating ring 311 through the arc groove 223. As the inclined plane push frame 212 continues to rotate, when the inclined plane of the inclined plane push frame 212 separates from the spring rod 213, it will squeeze the piston plate 222 to fit with the annular block 221, pushing all the hydraulic oil between the annular block 221 and the piston plate 222 towards the rotating ring 311, so that more hydraulic oil comes into contact with the squeezing block 312 and the rotating ring 311. When the rotating rod 111 rotates, it will drive the spring push block 322 to rotate, causing the spring push block 322 to contact the vertical edge of the inclined groove 321, such as... Figure 9 As shown in the position of J, this drives the rotating ring 311 to rotate, which in turn drives the extrusion block 312 to rotate. When the extrusion block 312 rotates, it squeezes the hydraulic oil in the hydraulic chamber 211, causing the hydraulic oil to flow in the diversion groove 313. Since the diversion groove 313 has multiple branch channels, it will change the flow direction of the hydraulic oil multiple times, thereby increasing the flow resistance of the hydraulic oil. This causes the extrusion block 312 to experience greater resistance when rotating, thus slowing down the rotation speed of the extrusion block 312 and the rotating ring 311, and causing the rotating rod 11 to... The slower rotation speed of the helical drum 112 and the slower rotation speed of the helical drum 112 will slow down the release speed of the cable, thereby slowing down the descent speed of the lifeboat and making it fall slowly. This effectively prevents the brake lever 15 from being released suddenly to a large extent. The friction force on the brake disc 121 is small, and the resistance to the lifeboat is small. The lifeboat will fall quickly due to its own weight, causing the lifeboat to swing with a large amplitude during the descent. During the swing, it may collide with the cable-laying boat, thereby making the lifeboat fall smoothly to the sea surface. Secondly, when the piston plate 222 squeezes the hydraulic oil to flow, the hydraulic oil will enter the arc groove 223, causing the hydraulic oil to be split into two streams. As the hydraulic oil continues to flow, the two streams of hydraulic oil will collide with each other at the outlet of the arc groove 223, thereby consuming the kinetic energy of the hydraulic oil and slowing down the flow speed of the hydraulic oil. When the piston plate 222 moves, the flow speed of the hydraulic oil slows down, which will increase the resistance to the movement of the piston plate 222. The inclined plane push frame 212 needs to apply a greater force to squeeze the spring rod 213 to move, thereby increasing the rotation resistance of the brake rod 15. This will reduce the distance that the brake rod 15 rotates due to inertia when it rotates, effectively preventing the operator from rotating the brake rod 15 too forcefully due to inertia, which would cause the brake rod 15 to rotate too much at one time. This makes it easier to adjust the force applied to the brake rod 15, thereby making it easier to control the rotation angle of the brake rod 15. Secondly, by precisely controlling the rotation angle of the brake lever 15, the operator can adjust the rotation angle of the brake lever 15 to the correct position more quickly. When a major accident occurs on the cable-laying vessel and a lifeboat needs to be used, the operator can quickly turn the brake lever 15 to the correct position, reducing the adjustment time of the brake lever 15. This effectively prevents the brake lever 15 from being difficult to adjust to the correct position in one go when adjusting the squeezing force on the brake disc 121, which would require multiple adjustments and thus increase the operator's escape time. Secondly, when the rotating rod 111 rotates clockwise, it drives the spring-driven block 322 to rotate, which in turn drives the rotating ring 311 to rotate. When the lifeboat needs to be released during an escape drill, and after release, it needs to be re-hung. The starting motor 113 drives the one-way clutch 114 to rotate counterclockwise, causing the inner and outer rings of the one-way clutch 114 to close together. This causes the rotating rod 111 and the rope drum 112 to rotate counterclockwise, allowing the rope drum 112 to wind up the hoisting cable, which pulls the lifeboat upwards. When the rotating rod 111 rotates counterclockwise, the inclined surface of the spring-driven block 322 contacts the inclined surface of the inclined groove 321. At this time... Because the brake lever 15 needs to rotate at a large angle to reduce the friction on the brake disc 121, the rotating ring 311 and the compression block 312 will experience significant hydraulic resistance when rotating. When the spring push block 322 rotates, it will be squeezed down by the inclined groove 321, accumulating rebound force until the spring push block 322 separates from the inclined groove 321, allowing the rotating rod 111 to rotate smoothly. This effectively prevents the hydraulic resistance on the compression block 312 from being transmitted to the rotating rod 111 when the rope drum 112 is started to rotate and wind up the cable during a lifeboat release drill, thus increasing the rotational resistance of the rope drum 112.

[0034] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A suspension structure for a lifeboat on a cable-laying vessel, comprising an inverted boom davit (13), wherein two connecting blocks (14) are fixedly connected to the bottom of the inverted boom davit (13), the inner and outer walls of the two connecting blocks (14) contain identical parts, a brake rod (15) is rotatably connected to the inner wall of the connecting block (14), a pin (16) is slidably connected to the inner wall of the connecting block (14), and the outer wall of the pin (16) is slidably connected to the inner wall of the brake rod (15), characterized in that, Also includes: The davit mechanism (1) is rotatably mounted on the inner wall of the connecting block (14) for releasing the lifeboat; The extrusion mechanism (2) is slidably disposed on the inner wall of the connecting block (14) for extruding liquid medium; The deceleration mechanism (3) is rotatably disposed on the inner wall of the connecting block (14) to reduce the descent speed of the lifeboat; When in use, the operator rotates the brake lever (15) to release the lifeboat from the davit mechanism (1), and then lowers the lifeboat through the inverted boom davit (13). During the descent, the lifeboat is lowered slowly by the squeezing mechanism (2) and the deceleration mechanism (3).

2. The suspension structure for a lifeboat on a cable-laying vessel according to claim 1, characterized in that: The davit mechanism (1) includes: Cable assembly (11), which is rotatably disposed on the inner wall of the connecting block (14) via a rotating component; The rotating component includes a rotating rod (111) rotatably connected to the inner wall of the connecting block (14), and a motor (113) is fixedly connected to the side wall of the connecting block (14). Brake assembly (12), which is fixedly mounted on the outer wall of rotating rod (111) by a fastener; The fastener includes a brake disc (121) fixedly connected to the outer wall of the rotating rod (111), and a clamp (122) fixedly connected to the inner wall of the connecting block (14). When the brake lever (15) is turned, the friction between the brake assembly (12) and the cable assembly (11) is reduced, and the lifeboat will fall due to its own weight.

3. The suspension structure for a lifeboat on a cable-laying vessel according to claim 2, characterized in that: The extrusion mechanism (2) includes: A push assembly (21) is fixedly connected to the outer wall of the brake lever (15) via a connector; The connector includes an inclined pusher frame (212) fixedly connected to the outer wall of the brake lever (15), and a hydraulic cavity (211) is provided on the inner wall of the connecting block (14). A flow guiding component (22) is slidably disposed on the inner wall of the hydraulic chamber (211); When the brake lever (15) rotates, it will drive the inclined plane pusher (212) to rotate, causing the inclined plane pusher (212) to squeeze and push the pusher assembly (21) to move.

4. The suspension structure for a lifeboat on a cable-laying vessel according to claim 2, characterized in that: The mitigation mechanism (3) includes: Rotating assembly (31), which is rotatably mounted on the outer wall of rotating rod (111) via a support member; The support includes a rotating ring (311) that is rotatably connected to the outer wall of the rotating rod (111). A one-way component (32) is slidably disposed on the inner wall of the rotating rod (111); When the lifeboat is falling, the rotating rod (111) will rotate, which will drive the one-way component (32) to rotate, thereby causing the rotating component (31) to rotate, increasing the falling resistance of the lifeboat.

5. The suspension structure for a lifeboat on a cable-laying vessel according to claim 2, characterized in that: The cable assembly (11) includes a rope drum (112) disposed on the front of the connecting block (14), the side wall of the rope drum (112) is fixedly connected to the side wall of the rotating rod (111), and a one-way clutch (114) is disposed on the back of the connecting block (14). The output end sidewall of the motor (113) is fixedly connected to the sidewall of the one-way clutch (114), and the side of the rotating rod (111) away from the rope drum (112) is fixedly connected to the side of the one-way clutch (114) away from the motor (113). In this process, starting the motor (113) causes the one-way clutch (114) to rotate, which in turn drives the rotating rod (111) and the rope drum (112) to rotate. The one-way clutch (114) ensures that the motor (113) can only drive the rotating rod (111) to rotate in one direction.

6. The suspension structure for a lifeboat on a cable-laying vessel according to claim 5, characterized in that: The brake assembly (12) includes a ramp block (123) fixedly connected to the outer wall of the brake lever (15), a spring friction plate (124) slidably connected to the inner wall of the clamp (122), the outer wall of the ramp block (123) being rotatably connected to the inner wall of the connecting block (14), and the outer wall of the brake disc (121) being rotatably connected to the inner wall of the clamp (122). When the operator turns the brake lever (15), it will also cause the inclined block (123) to rotate, which will reduce the squeezing force of the inclined block (123) on the spring friction plate (124), thereby reducing the squeezing force on the brake disc (121). The lifeboat will fall due to its own weight.

7. The suspension structure for a lifeboat on a cable-laying vessel according to claim 3, characterized in that: The pushing assembly (21) includes a spring rod (213) slidably connected to the inner wall of the connecting block (14), and hydraulic oil is provided on the inner wall of the hydraulic chamber (211); The flow guiding assembly (22) includes an annular block (221) fixedly connected to the inner wall of the hydraulic chamber (211), a piston plate (222) slidably connected to the outer wall of the annular block (221), and the side wall of the piston plate (222) fixedly connected to the side wall of the spring rod (213). The inner wall of the annular block (221) is provided with several arc-shaped grooves (223), and the outer wall of the piston plate (222) is slidably connected to the inner wall of the hydraulic cavity (211). When the brake lever (15) is rotated, the inclined plane pusher (212) will also rotate. The inclined plane of the inclined plane pusher (212) will squeeze the spring rod (213) to move, which will drive the piston plate (222) to move. Since the hydraulic oil is not completely filled with the hydraulic chamber (211), the piston plate (222) will squeeze the hydraulic oil to flow.

8. The suspension structure for a lifeboat on a cable-laying vessel according to claim 4, characterized in that: The rotating assembly (31) includes six extrusion blocks (312) rotatably connected to the inner wall of the hydraulic chamber (211). The side of each of the six extrusion blocks (312) near the rotating rod (111) is fixedly connected to the outer wall of the rotating ring (311). Each of the six extrusion blocks (312) has a flow divider groove (313) on its inner wall. When the rotating rod (111) rotates, the rotating ring (311) is rotated by the one-way component (32), thereby driving the extrusion block (312) to rotate, allowing the hydraulic oil to flow in the diversion groove (313), increasing the rotational resistance of the extrusion block (312).

9. The suspension structure for a lifeboat on a cable-laying vessel according to claim 8, characterized in that: The unidirectional component (32) includes six inclined grooves (321) formed on the inner wall of the rotating ring (311), and six spring push blocks (322) are slidably connected to the inner wall of the rotating rod (111). The outer walls of the six spring push blocks (322) are all slidably connected to the inner wall of the inclined grooves (321). When the rotating rod (111) rotates, it will drive the spring push block (322) to rotate, so that the spring push block (322) contacts the inner wall of the inclined groove (321) and pushes the rotating ring (311) to rotate.

10. A method of using a suspension structure for a lifeboat on a cable-laying vessel, employing the suspension structure for a lifeboat on a cable-laying vessel as described in claim 9, characterized in that: Includes the following steps, S1: Release preparation: Install the inverted boom davit (13) on the side of the cable-laying vessel. When it is necessary to release the lifeboat, the operator opens the lifeboat's safety lock and the brake or fixing bolt in the inverted boom davit (13). S2: Falling due to its own weight: The lifeboat will fall due to its own weight. During the falling process, it will drive the movable boom in the inverted boom davit (13) to rotate, causing the movable boom to tilt and change the position of the lifeboat, so that the lifeboat hangs on the sea surface. S3: Brake separation: The operator pulls the pin (16) to separate from the brake lever (15), removes the fixation of the brake lever (15), and then rotates the brake lever (15) to drive the inclined block (123) to rotate, reducing the friction force on the brake disc (121) and allowing the lifeboat to fall smoothly.

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