A non-load bearing and load bearing release davit device

Abstract

The application discloses a non-load-bearing and load-bearing release davit lock device, which comprises a first release lock, a second release lock and a slow descent traction mechanism; the first release lock is connected to a sling drawn from a davit frame, the slow descent traction mechanism is connected to the first release lock, the second release lock is connected to a slow descent rope drawn from the slow descent traction mechanism, and the first release lock and the second release lock are respectively arranged to open and close the lock of the first hole plate and the second hole plate of a lifeboat; when the first release lock is in a locked state and the second release lock is in a non-locked state, a non-load-bearing release structure for the lifeboat in a non-load-bearing state is formed; when the first release lock is in a locked state and the second release lock is in a locked state, a load-bearing release structure for the lifeboat in a load-bearing state is formed. The davit lock device formed by the first release lock, the second release lock and the slow descent traction mechanism realizes efficient and safe release of the lifeboat in a non-load-bearing and load-bearing state.

Description

Technical Field

[0001] This invention belongs to the field of lifeboat launching technology, and particularly relates to a non-load-bearing and load-bearing davit locking device. Background Technology

[0002] When lifeboats are released into the water, there are two states: non-loaded and loaded. When releasing lifeboats into the water using a davit, it is essential to ensure both safety and the fastest possible time from lifting to entry into the water, which is to ensure efficiency. The locking mechanism connecting the lifeboat's perforated plate and the release method play a crucial role in the safety and efficiency of lifeboat release. Although some existing locking mechanisms have fast opening and closing speeds, the method of releasing lifeboats into the water is by dropping. When the lifeboat is in a loaded state, it is easy to cause injury or falls to personnel. Therefore, it is not possible to achieve a good balance between the efficiency and safety of lifeboat release. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the prior art, the present invention provides a davit locking device for both non-load-bearing and load-bearing release. The davit locking device, consisting of a first release lock, a second release lock, and a slow descent traction mechanism, enables efficient and safe release of the lifeboat in both non-load-bearing and load-bearing states.

[0004] Technical Solution: To achieve the above objectives, the present invention provides a non-load-bearing and load-bearing release davit locking device, comprising a first release lock, a second release lock, and a descent traction mechanism; the first release lock is connected to a sling extending from the davit frame, the descent traction mechanism is connected to the first release lock, and the second release lock is connected to a descent rope extending from the descent traction mechanism, with the first and second release locks respectively configured to open and close the first and second orifice plates of the lifeboat; when the first release lock is in a locked state and the second release lock is in an unlocked state, a non-load-bearing release structure for the lifeboat in a non-load-bearing state is formed; when the first release lock is in a locked state and the second release lock is in a locked state, a load-bearing release structure for the lifeboat in a load-bearing state is formed.

[0005] Furthermore, when the lifeboat is launched into the water without bearing any load, the first release lock is locked to the first hole plate, and the second release lock is unlocked to the second hole plate. When the lifeboat approaches the water surface, the first release lock unlocks and releases the lifeboat.

[0006] When the lifeboat is being hoisted and launched into the water, the first release lock is locked to the first hole plate, and the second release lock is locked to the second hole plate. When the lifeboat approaches the water surface, the first release lock unlocks, and the descent traction mechanism releases the descent rope to slowly lower the lifeboat into the water. The second release lock unlocks after the lifeboat reaches a stable floating state where its weight and buoyancy are balanced, thus completely releasing the lifeboat.

[0007] Furthermore, the descent traction mechanism includes a rotating base, a drum, and a coil spring; the rotating base is rotatably connected to the lock seat of the first release lock via a damping shaft, and the descent traction mechanism can switch positions between the lower and lateral positions of the first release lock via a damping rotation action; the drum is mounted at the bottom of the rotating base via a drum frame, and the descent rope extending from the drum is connected to the second release lock; at least one coil spring is mounted on the drum shaft, with the inner end of the coil spring connected to the drum shaft and the outer end of the coil spring connected to the bottom of the rotating base; the descent traction mechanism retracts the rope using the elastic force provided by the coil spring, and during the process of slowly lowering the lifeboat into the water under the descent traction mechanism, the gradually increasing elastic force of the coil spring gradually reduces the rope release speed of the drum, thereby achieving the slow descent of the lifeboat.

[0008] Furthermore, a rope catcher is provided on the drum frame, and the descent rope led out from the drum passes through the rope catcher's catcher cavity to be tied.

[0009] Furthermore, the first release lock includes a lock seat and a pair of lock arms that are rotatably opened and closed on the lock seat via arm shafts; the top of the lock seat has a lifting ring and a handle; the two arm shafts are connected by a gear transmission that is coaxially arranged, wherein one arm shaft is correspondingly connected to a lock drive unit located on the lock seat, and the other arm shaft is correspondingly provided with a brake unit located on the lock seat.

[0010] Furthermore, the inner sides of the pair of locking arms are respectively provided with protective arms. When the two locking arms are closed, the pair of protective arms are synchronously connected to each other, so that the two locking arms and the two protective arms limit each other to form a closed locking arm ring structure.

[0011] Furthermore, the first release lock and the second release lock have the same structure, wherein the sling extending from the davit is connected to the sling of the first release lock, and the descent rope extending from the descent traction mechanism is connected to the sling of the second release lock.

[0012] Furthermore, in the first release lock, the corresponding locking arm ring structure is connected to the first perforated plate of the lifeboat; in the second release lock, the corresponding locking arm ring structure is connected to the second perforated plate of the lifeboat.

[0013] Beneficial effects: This invention, through a davit locking device consisting of a first release lock, a second release lock, and a slow-descent traction mechanism, achieves efficient and safe release of the lifeboat in both non-load-bearing and load-bearing states. In the non-load-bearing state, the lifeboat can be lowered in two stages: before and after the first release lock is unlocked. The first stage involves the davit frame releasing the sling at a constant or accelerating speed. The second stage involves the slow-descent traction mechanism releasing the slow-descent rope at a slower, gradually decelerating speed. This ensures both efficient release of the lifeboat into the water under load-bearing conditions and maintains safety, making it suitable for large-scale application. Attached Figure Description

[0014] Appendix Figure 1 This is a schematic diagram of the overall structure of the non-load-bearing and load-bearing release device of the present invention;

[0015] Appendix Figure 2 This is an embodiment of a specific application of the non-load-bearing and load-bearing release device of the present invention;

[0016] Appendix Figure 3 This is a schematic diagram of the first release lock and the slow-descent traction mechanism.

[0017] Appendix Figure 4 This is a schematic diagram of the second release lock. Detailed Implementation

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] As attached Figure 1 and attached Figure 2 As shown, a non-load-bearing and load-bearing release davit locking device includes a first release lock 1, a second release lock 2, and a descent traction mechanism 3. The first release lock 1 is connected to a sling 5 extending from the davit frame. The descent traction mechanism 3 is connected to the first release lock 1. The second release lock 2 is connected to a descent rope 30 extending from the descent traction mechanism 3. The first release lock 1 and the second release lock 2 are respectively configured to open and close the first perforated plate 41 and the second perforated plate 42 of the lifeboat 4. When the first release lock 1 is in the locked state and the second release lock 2 is in the unlocked state, a non-load-bearing release structure for the lifeboat 4 in a non-load-bearing state is formed. When the first release lock 1 is in the locked state and the second release lock 2 is in the locked state, a load-bearing release structure for the lifeboat 4 in a load-bearing state is formed.

[0020] More specifically, in the non-load-bearing hoisting and launching state of lifeboat 4, the first release lock 1 is in the locked state corresponding to the first hole plate 41, and the second release lock 2 is in the unlocked state corresponding to the second hole plate 42. When lifeboat 4 approaches the water surface, the first release lock 1 unlocks and releases lifeboat 4. In this condition, the second release lock 2 does not participate in the locking connection of lifeboat 4; only the first release lock 1 is responsible for the locking connection of lifeboat 4. This condition is a non-load-bearing situation, and the efficiency of lifeboat 4 launching into the water is relatively high.

[0021] When the lifeboat 4 is being hoisted and launched into the water, the first release lock 1 is locked to the first hole plate 41, and the second release lock 2 is locked to the second hole plate 42. When the lifeboat 4 approaches the water surface, the first release lock 1 unlocks, and the descent traction mechanism 3 releases the descent rope 30 to slowly lower the lifeboat 4 into the water. The second release lock 2 unlocks after the lifeboat 4 reaches a stable floating state where the weight and buoyancy are balanced, and the lifeboat 4 is completely released. In this condition, initially, both the first release lock 1 and the second release lock 2 are involved in the locking connection of the lifeboat 4. However, the second release lock 2 is not under stress before the first release lock 1 is unlocked. Only after the first release lock 1 is unlocked, that is, when the lifeboat 4 approaches the water surface, does the second release lock 2 begin to bear stress. From this moment on, the descent rope 30 is released through the descent traction mechanism 3 to slowly lower the lifeboat 4 into the water. After the lifeboat stabilizes in the water, the second release lock 2 can be unlocked, completing the final and complete release of the lifeboat 4. This condition is under load and can be divided into two stages of lowering the lifeboat 4: before and after the first release lock 1 is unlocked. The first stage is achieved by the release of the sling 5 from the davit frame at a constant or accelerating speed. The second stage is achieved by the release of the descent rope 30 from the descent traction mechanism 3 at a slower speed with gradual deceleration, ensuring both the efficiency of the lifeboat 4's release into the water under load and taking safety into account.

[0022] Therefore, the present invention, through the davit locking device consisting of the first release lock 1, the second release lock 2 and the slow descent traction mechanism 3, enables the efficient and safe release of the lifeboat 4 in both non-load-bearing and load-bearing states, and is suitable for large-scale promotion and application.

[0023] As attached Figure 3 and attached Figure 4As shown, the slow descent traction mechanism 3 includes a rotating seat 32, a drum 33, and a coil spring 34. The rotating seat 32 is rotatably connected to the lock seat 11 of the first release lock 1 via a damping shaft 31. The slow descent traction mechanism 3 can switch positions between the lower position and the side position of the first release lock 1 through a damping rotation action. When the first release lock 1 is locked on the first hole plate 41, in order to avoid the obstruction of the slow descent traction mechanism 3, the entire slow descent traction mechanism 3 can be rotated to the side position of the first release lock 1 to facilitate the locking action of the first release lock 1. The drum 33 is mounted at the bottom of the rotating seat 32 via a drum frame 37. The descent rope 30 extending from the drum 33 is connected to the second release lock 2. At least one coil spring 34 is mounted on the drum shaft 35 of the drum 33. The inner end of the coil spring 34 is connected to the drum shaft 35, and the outer end of the coil spring 34 is connected to the bottom of the rotating seat 32. The descent traction mechanism 3 uses the elastic force provided by the coil spring 34 to reel in the rope. During the slow descent of the lifeboat 4 into the water by the descent traction mechanism 3, the gradually increasing elastic force of the coil spring 34 gradually reduces the rope-releasing speed of the drum 33, thus achieving a slow descent of the lifeboat 4. The descent traction mechanism 3 utilizes the resistance between the elastic force of the torsion spring 34 and the weight of the lifeboat 4 to achieve a safe descent of the lifeboat 4 in a slow and gradually decelerating manner. The rope reeling also relies on the restoring elastic force of the torsion spring 34, eliminating the need for external power equipment.

[0024] The drum frame 37 is provided with a rope binder 36. The descent rope 30 led out from the drum 33 passes through the rope binding cavity of the rope binder 36 and is bound together. In this invention, the rope binder 36 is a rope binding drum.

[0025] The first release lock 1 includes a lock base 11 and a pair of lock arms 13 rotatably opened and closed on the lock base 11 via arm shafts 12; the top of the lock base 11 has a lifting ring 15 and a handle 16; the two arm shafts 12 are connected by a gear 14 arranged coaxially, wherein one arm shaft 12 is correspondingly connected to a lock drive part 18 located on the lock base 11, the lock drive part 18 is preferably a servo motor, and the other arm shaft 12 is correspondingly provided with a brake part 19 located on the lock base 11, the brake part 19 is preferably a brake brake.

[0026] The inner sides of the two locking arms 13 are respectively provided with protective arms 17. When the two locking arms 13 are closed, the pair of protective arms 17 are synchronously connected to each other, so that the two locking arms 13 and the two protective arms 17 are limited to form a closed locking arm ring structure. The function of the protective arms 17 is to protect the gear 14 from collision with the perforated plate.

[0027] The first release lock 1 and the second release lock 2 have the same structure. The sling 5 extending from the davit frame is connected to the sling 15 of the first release lock 1, and the descent rope 30 extending from the descent traction mechanism 3 is connected to the sling 15 of the second release lock 2. In the first release lock 1, the corresponding locking arm ring structure is connected to the first perforated plate 41 of the lifeboat 4; in the second release lock 2, the corresponding locking arm ring structure is connected to the second perforated plate 42 of the lifeboat 4.

[0028] In the first release lock 1 and the second release lock 2 of the present invention, the locking action is performed manually by hand, and then the locking action is performed by the lock drive unit 18. However, when unlocking, no manual intervention is required, and the locking action is performed automatically by the lock drive unit 18.

[0029] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A davit locking device for both non-load-bearing and load-bearing release, characterized in that: The system includes a first release lock (1), a second release lock (2), and a descent traction mechanism (3). The first release lock (1) is connected to a sling (5) extending from the davit frame. The descent traction mechanism (3) is connected to the first release lock (1). The second release lock (2) is connected to a descent rope (30) extending from the descent traction mechanism (3). The first release lock (1) and the second release lock (2) are respectively configured to open and close the first hole plate (41) and the second hole plate (42) of the lifeboat (4). When the first release lock (1) is in the locked state and the second release lock (2) is in the unlocked state, it constitutes a non-load-bearing release structure for the lifeboat (4) in a non-load-bearing state. When the first release lock (1) is in the locked state and the second release lock (2) is in the locked state, it constitutes a load-bearing release structure for the lifeboat (4) in a load-bearing state. When the lifeboat (4) is in a non-load-bearing hoisting and launching state, the first release lock (1) is in a locked state corresponding to the first hole plate (41), and the second release lock (2) is in a unlocked state corresponding to the second hole plate (42). When the lifeboat (4) approaches the water surface, the first release lock (1) unlocks and releases the lifeboat (4). When the lifeboat (4) is in the state of being lifted and launched into the water, the first release lock (1) is locked to the first hole plate (41), and the second release lock (2) is locked to the second hole plate (42). When the lifeboat (4) approaches the water surface, the first release lock (1) unlocks, and the descent traction mechanism (3) releases the descent rope (30) to slowly lower the lifeboat (4) into the water. The second release lock (2) unlocks after the lifeboat (4) reaches a stable floating state when the weight and buoyancy of the lifeboat (4) are balanced, and the lifeboat (4) is completely released. The descent traction mechanism (3) includes a rotating seat (32), a drum (33), and a coil spring (34); the rotating seat (32) is rotatably connected to the lock seat (11) of the first release lock (1) via a damping shaft (31); the descent traction mechanism (3) can switch positions between the lower and lateral positions of the first release lock (1) via a damping rotation action; the drum (33) is set at the bottom of the rotating seat (32) via a drum frame (37); the descent rope (30) led out from the drum (33) is connected to the second release lock (2). At least one of the coil springs (34) is disposed on the drum shaft (35) of the drum (33). The inner end of the coil spring (34) is connected to the drum shaft (35), and the outer end of the coil spring (34) is connected to the bottom of the rotating seat (32). The descent traction mechanism (3) retracts the rope through the elastic force provided by the coil spring (34). During the process of the descent traction mechanism (3) slowly lowering the descent rope (30) into the water, the rope release speed of the drum (33) is gradually reduced by the gradually increasing elastic force of the coil spring (34), thereby realizing the slow descent of the lifeboat (4).

2. The davit locking device for non-load-bearing and load-bearing release according to claim 1, characterized in that: The drum frame (37) is provided with a rope catcher (36), and the descent rope (30) led out from the drum (33) passes through the rope catcher (36) to be tied.

3. The davit locking device for non-load-bearing and load-bearing release according to claim 1, characterized in that: The first release lock (1) includes a lock seat (11) and a pair of lock arms (13) rotatably opened and closed on the lock seat (11) via arm shafts (12); the top of the lock seat (11) has a lifting ring (15) and a handle (16); the two arm shafts (12) are connected by a gear (14) arranged coaxially, wherein one arm shaft (12) is correspondingly connected to a lock drive part (18) located on the lock seat (11), and the other arm shaft (12) is correspondingly provided with a brake brake part (19) located on the lock seat (11).

4. A davit locking device for non-load-bearing and load-bearing release according to claim 3, characterized in that: The inner sides of the pair of locking arms (13) are respectively provided with protective arms (17). When the two locking arms (13) are closed, the pair of protective arms (17) are simultaneously connected, so that the two locking arms (13) and the two protective arms (17) are limited to form a closed locking arm ring structure.

5. A davit locking device for non-load-bearing and load-bearing release according to claim 4, characterized in that: The first release lock (1) and the second release lock (2) have the same structure. The sling (5) extending from the davit is connected to the sling (15) of the first release lock (1), and the descent rope (30) extending from the descent traction mechanism (3) is connected to the sling (15) of the second release lock (2).

6. A davit locking device for non-load-bearing and load-bearing release according to claim 4, characterized in that: In the first release lock (1), the corresponding locking arm ring structure is connected to the first hole plate (41) of the lifeboat (4); in the second release lock (2), the corresponding locking arm ring structure is connected to the second hole plate (42) of the lifeboat (4).

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