Gravity inverted arm type boat hanging frame

Abstract

The utility model discloses a gravity inverted arm type boat hanging frame which comprises two sets of seat frames, two sets of rotating shaft devices, two sets of suspension arms, a boat lifting winch and two sets of air cylinders, the seat frames are fixedly connected to a mother boat, the suspension arms are movably connected with the seat frames through the rotating shaft devices, guide pulleys are arranged on the suspension arms, and the guide pulleys are arranged on the seat frames. One end of the air cylinder is connected to a mother ship through a bearing, the other end of the air cylinder is connected with the suspension arm through a bearing, and the boat lifting winch is fixedly connected to the side wall of the air cylinder.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment, in particular to a gravity-inverted boom davit. Background Art

[0002] A davit is a special device used on a ship to lift and lower a lifeboat or a workboat. Generally located at the stern of the ship, it is usually inside the ship's side when not in use and extends outside the side when in use to lift or lower the boat. According to the operation method of receiving and releasing the boat, it is divided into three types: rotating-out type, rocking-down type and gravity type. With the requirements of the SOLAS code, it is further divided into five types: throwing-down type, gravity-inverted boom type, four-link type, platform type, single boom, etc.;

[0003] Existing davits generally need to be equipped with multiple power systems. Especially for gravity-inverted boom davits, they generally not only need to be equipped with a dedicated rotating shaft power system for the boom, but also need to be equipped with a dedicated power system for the winch, etc. During operation, multiple power systems need to cooperate with each other to complete the normal use of the davit, which has the problem of inconvenient operation. And existing davits must be operated with power on. Once power supply to the davit cannot be provided in case of an emergency, the boom of the davit cannot be extended, affecting the escape of the crew;

[0004] In view of this, there is an urgent need for a gravity-inverted boom davit that can solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a gravity-inverted boom davit that can solve the above problems.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: A gravity-inverted boom davit, comprising:

[0007] Two groups of seat frames, two groups of rotating shaft devices, two groups of booms, a boat-lifting winch and two groups of cylinders. The seat frames are fixedly connected to the mother ship. The booms are movably connected to the seat frames through the rotating shaft devices, and a guide pulley is provided on the boom. One end of the cylinder is connected to the mother ship by a bearing, and the other end is connected to the boom by a bearing. The boat-lifting winch is fixedly connected to the side wall of the cylinder.

[0008] Preferably, the boat-lifting winch includes a winch body, a weight, a winch rope and a suspension device. One end of the weight is located inside the winch body and is connected to the friction plate of the winch body, and the other end is located outside the winch body. The winch body is provided with a plurality of guide pulleys matching with it. The suspension device is located at one end of the boom away from the seat frame. One end of the winch rope is located inside the winch body, and the other end passes through a plurality of guide pulleys and the guide pulley and is connected to the suspension device.

[0009] Preferably, a limiting device fixedly connected to the boom is provided at one end of the boom close to the seat frame.

[0010] Preferably, a connecting frame fixedly connected to the two boom arms is provided between the two boom arms. A boat support movably connected to the connecting frame is provided on the connecting frame, and the side wall of the boat support in contact with the lifeboat is arc-shaped.

[0011] Preferably, a boat mooring device hinged to the connecting frame is provided on the connecting frame, and the other end of the boat mooring device is hinged to the side wall of the cylinder.

[0012] Preferably, a boarding platform matching the boom arm is provided on the boom arm.

[0013] Preferably, a hoisting hand crank socket is provided on the winch body, and a hoisting hand crank detachably connected to the hoisting hand crank socket is provided on the hoisting hand crank socket.

[0014] Preferably, a plurality of blocks fixedly connected to the mother ship are provided at the middle position between the two seat frames, and the side of the block close to the still water is in a slope shape.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] The setting of the counterweight in the lifeboat winch enables a single lifeboat winch to control the boom arm and the suspension device. After the boom arm rotates to a certain angle, the suspension device is controlled to complete the hoisting of the lifeboat. At the same time, the setting of the hand crank socket can manually complete the hoisting of the lifeboat in the event of a power failure in an emergency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is an overall sectional structure schematic diagram of a gravity inverted boom type lifeboat davit;

[0018] Figure 2 is a front sectional structure schematic diagram of the gravity inverted boom type lifeboat davit in the present utility model.

[0019] In the figure: 1, seat frame; 2, rotating shaft device; 3, boom arm; 30, guide pulley; 31, connecting frame; 32, boat support; 33, boat mooring device; 34, boarding platform; 35, limiting device; 4, lifeboat winch; 40, winch body; 400, hoisting hand crank socket; 401, hoisting hand crank; 41, counterweight; 42, winch rope; 43, suspension device; 44, guide pulley; 5, cylinder; 6, block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0021] Please refer to the attached Figure 1-2

[0022] Two sets of mounting frames 1, two sets of rotating shaft devices 2, two sets of lifting arms 3, a lifeboat winch 4, and two sets of cylinders 5. The mounting frame 1 is fixedly connected to the mother ship. The lifting arm 3 is movably connected to the mounting frame 1 through the rotating shaft device 2. A guiding pulley 30 is provided on the lifting arm 3. One end of the cylinder 5 is connected to the mother ship by a bearing, and the other end is connected to the lifting arm 3 by a bearing. The lifeboat winch 4 is fixedly connected to the side wall of the cylinder 5.

[0023] Specifically, the lifeboat winch 4 includes a winch body 40, a weight 41, a winch rope 42, and a suspension device 43. One end of the weight 41 is located inside the winch body 40 and is connected to the friction plate of the winch body 40, and the other end is located outside the winch body 40. The winch body 40 is provided with a plurality of guiding pulleys 44 that match it. The suspension device 43 is located at one end of the lifting arm 3 away from the mounting frame 1. One end of the winch rope 42 is located inside the winch body 40, and the other end passes through a plurality of the guiding pulleys 44 and the guiding pulley 30 and is connected to the suspension device 43.

[0024] During specific use, under normal conditions, one end of the weight 41 located inside the winch body 40 is connected to the friction plate of the winch body 40. At this time, the friction plate contacts the winch rope 42 inside the winch body 40, forming a lock on the winch rope 42. In this state, when the lifeboat winch 4 releases the brake, the gravity of the lifeboat will directly act on the lifting arm 3, causing the lifting arm 3 to rotate and turn towards the still water area. During this process, the continuous rotation of the lifting arm 3 will apply an external force to the cylinder 5, and the reverse force of the cylinder 5 will slow down the rotation speed of the lifting arm 3, avoiding the situation where the lifeboat swings greatly due to the too fast rotation speed of the lifting arm 3. The continuous rotation continues until the lifting arm 3 rotates to a certain extent and contacts the part of the weight 41 located outside the winch body 40, and applies an external force to this part, thereby causing the part of the weight 41 located inside the winch body 40 to disengage from the winch rope 42. At this time, the winch rope 42 is no longer locked, and the gravity of the lifeboat will instead act on the suspension device 43 and pull the winch rope 42, thereby completing the operation of lowering the lifeboat to the still water surface.

[0025] When it is necessary to retrieve the lifeboat, the winch body 40 is driven by electricity, and then the winch rope 42 is wound up. First, the lifeboat is retrieved. When the lifeboat contacts the lifting arm through the winding of the winch rope 42, after the lifeboat is disengaged from the lifting arm 3, the rotation of the lifting arm is started until the lifting arm rotates back to the initial position, and the weight 41 locks the winch rope 42 again, then the work of retrieving the lifeboat is completed.

[0026] Specifically, a limiting device 35 fixedly connected to the jib 3 is provided at one end of the jib 3 close to the mounting frame 1. Considering that during the lifeboat recovery process, if the power supply of the winch body 40 is not disconnected in time after the lifeboat recovery work is completed, the winch body may be damaged. Therefore, the limiting device 35 is provided on the jib. When the jib 3 returns to the initial position, the power supply of the winch body 40 can be automatically disconnected.

[0027] Specifically, a connecting frame 31 fixedly connected to the two jibs 3 is provided between the two jibs 3. A lifeboat support 32 movably connected to the connecting frame 31 is provided on the connecting frame 31, and the side wall of the lifeboat support 32 in contact with the motorboat is arc-shaped. Considering that during the rotation of the jib 3, it will inevitably swing due to inertia. In order to reduce the discomfort brought to the personnel on the lifeboat by the swing, the connecting frame 31 and the lifeboat support 32 are provided. Through the hard contact of the lifeboat support 32, the buffering of the lifeboat is completed, and its swing amplitude is greatly reduced. The number of the lifeboat supports 32 can be set to multiple, and they can contact the lifeboat from different angles to enhance the buffering effect.

[0028] Specifically, a lifeboat tying device 33 hinged to the connecting frame 31 is provided on the connecting frame 31, and the other end of the lifeboat tying device 33 is hinged to the side wall of the cylinder 5. Considering that the lifeboat is in a suspended state when not in use, in order to avoid the situation that the lifeboat swings due to external forces in this state, the lifeboat tying device 33 is provided to limit the position of the lifeboat. Although the lifeboat tying device 33 is provided on the side wall of the cylinder 5 in the present invention, it does not mean that the lifeboat tying device 33 must be located there, and its position can be adjusted appropriately according to the actual situation.

[0029] Specifically, a boarding platform 34 matching the jib 3 is provided on the jib 3. Considering that there is a certain distance between the lifeboat in the suspended state and the mother ship, the boarding platform 34 is provided to facilitate the boarding of the personnel on the lifeboat.

[0030] Specifically, a hoisting hand crank socket 400 is provided on the winch body 40, and a hoisting hand crank 401 detachably connected to the hoisting hand crank socket 400 is provided on the hoisting hand crank socket 400. The lifeboat hoisting winch 4 is powered by electric hoisting and gravity lowering, and is the power source of the lifeboat. In order to avoid the situation that the mother ship suddenly loses power or the lifeboat cannot be recovered in place during the process of electrically recovering the lifeboat, the hoisting hand crank socket 400 and the hoisting hand crank 401 are provided. However, it should be noted that the hoisting hand crank should be removed in time when there is no manual force to prevent accidents.

[0031] Specifically, a plurality of blocks 6 fixedly connected to the mother ship are provided at the middle position between the two mounting frames 1. The side of the block 6 close to the still water is in a slope shape. In order to avoid the situation that the lifeboat contacts the mother ship due to swinging during the hoisting process and is damaged, the block 6 is provided to assist in hoisting the lifeboat and protect the lifeboat at the same time.

[0032] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent replacements or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A gravity inverted boom type lifeboat davit, characterized in that Including: Two groups of seat frames (1), two groups of rotating shaft devices (2), two groups of jibs (3), a lifeboat winch (4) and two groups of cylinders (5). The seat frames (1) are fixedly connected to the mother ship. The jibs (3) are movably connected to the seat frames (1) through the rotating shaft devices (2). A guiding pulley (30) is provided on the jib (3). One end of the cylinder (5) is connected to the mother ship by a bearing, and the other end is connected to the jib (3) by a bearing. The lifeboat winch (4) is fixedly connected to the side wall of the cylinder (5).

2. A gravity inverted jib type lifeboat davit according to claim 1, characterized in that: The lifeboat winch (4) includes a winch body (40), a weight (41), a winch rope (42) and a suspension device (43). One end of the weight (41) is located inside the winch body (40) and is connected to the friction plate of the winch body (40), and the other end is located outside the winch body (40). The winch body (40) is provided with a plurality of guiding pulleys (44) matching therewith. The suspension device (43) is located at one end of the jib (3) away from the seat frame (1). One end of the winch rope (42) is located inside the winch body (40), and the other end passes through a plurality of the guiding pulleys (44) and the guiding pulley (30) and is connected to the suspension device (43).

3. A gravity inverted jib type lifeboat davit according to claim 1, characterized in that: A limiting device (35) fixedly connected to the jib (3) is provided at one end of the jib (3) close to the seat frame (1).

4. A gravity inverted jib type lifeboat davit according to claim 1, characterized in that: A connecting frame (31) fixedly connected thereto is provided between the two groups of jibs (3). A lifeboat support (32) movably connected thereto is provided on the connecting frame (31). The side wall of the lifeboat support (32) in contact with the lifeboat is arc-shaped.

5. A gravity inverted jib type lifeboat davit according to claim 4, characterized in that: A lifeboat tying device (33) hinged thereto is provided on the connecting frame (31). The other end of the lifeboat tying device (33) is hinged to the side wall of the cylinder (5).

6. A gravity inverted jib type lifeboat davit according to claim 1, characterized in that: An embarkation platform (34) matching therewith is provided on the jib (3).

7. A gravity inverted jib type lifeboat davit according to claim 2, characterized in that: A hoisting hand crank socket (400) is further provided on the winch body (40), and a hoisting hand crank (401) detachably connected thereto is provided on the hoisting hand crank socket (400).

8. A gravity inverted jib type lifeboat davit according to claim 1, characterized in that: A plurality of blocks (6) fixedly connected to the mother ship are provided at the middle position between the two groups of seat frames (1). The side of the block (6) close to the still water is in a slope shape.

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