Lifeboat bearing and releasing system

Abstract

The utility model relates to the field of emergency lifesaving or rescue in seaborne or connected river and sea water areas, in particular to a lifeboat bearing and releasing system which comprises a lifeboat hanging hook rotationally connected to a lifeboat bow and a lifeboat stern, and a bearing stress point of an opening of the lifeboat hanging hook and a rotating circle center point of the lifeboat hanging hook are located on the same vertical line. An opening of the boat hanging hook is provided with a steel wire falling prevention structure forming enveloping with the opening, the boat bow and the boat stern of the lifeboat are respectively and vertically provided with a double-acting jack for driving the boat hanging hook to rotate around the rotating circle center, and the lifeboat is provided with an operating lever subsystem for controlling the double-acting jacks to act. A bottom plate of the lifeboat is provided with an internally-locked hydrostatic pressure unit subsystem which has a liquid level sensing function and is used for detecting whether the lifeboat falls onto the sea surface or the water surface or not. The system is beneficial to simplifying a boat hook system, and is safer and more reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of emergency lifesaving or rescue in sea or connecting river and sea water area, in particular to a lifeboat bearing release system. BACKGROUND

[0002] The typical bearing release system of the global lifeboat technology market can be explained by three subsystems and their connecting parts at present:

[0003] 1. The boat hook system of the quick release lifeboat davit lifting boat cable hook head (see Figure 1 in the middle );

[0004] 2. The operating rod structure of the release system (see Figure 1 in the middle );

[0005] 3. The internal locking hydrostatic pressure unit with the function of preventing the accidental falling of the lifeboat boat hook before the lifeboat enters the water (see Figure 1 in the middle );

[0006] 4. The connecting parts between the three systems, respectively: Figure 1 in the middle Flexible release wire and Figure 1 in the middle Interlocking part with conditional release lever accidental misoperation.

[0007] The existing lifeboat release device generally includes lifeboat bow, stern davit lifting hook, release operating handle, hydrostatic pressure device and connecting steel wire rope. The release of the lifeboat can be completed by operating the release handle near the steering position. In order to prevent the lifeboat from being accidentally released due to the misoperation of the crew before entering the water, causing human casualties, the lifeboat is equipped with a safety anti-hook system including a hydrostatic pressure internal locking device (see Figure 2 ).

[0008] The underlying technical principle of the lifeboat release device is:

[0009] (1) The boat hook system of the quick release lifeboat davit lifting boat cable hook head (in Figure 1 the middle ):

[0010] Scheme A: Cam lifting the center (see Figure 3 ), the lifting point of the boat wire (Falls) and the force center point on the lifting hook are eccentric to the force action line.

[0011] Scheme B: Cam lifting in the center (see Figure 4 ), the lifting point of the boat wire (Falls) and the force center point on the lifting hook are consistent with the force action line.

[0012] (2) The release lever structure of the operating system and its flexible release wire ( Figure 1 In For details, see [link / details]. Figure 5 .

[0013] (3) A hydrostatic pressure unit with an internal locking mechanism to prevent the lifeboat hook from accidentally detaching before the lifeboat enters the water. Figure 1 In For details, see [link / details]. Figure 6 .

[0014] However, existing lifeboat release mechanisms have the following drawbacks:

[0015] 1. Composition instability:

[0016] In the lifeboat hook system for rapid release of the lifeboat frame davit cable hook, in order to solve the problem of rapid release while also ensuring the safety of the release effect, the hook system device is too mutually constrained, which creates inherent harmful internal factors and causes physical instability of the hook system.

[0017] 2. The operation is too complex:

[0018] The control lever structure of the release system includes a safety pin, an interlocking control lever limiter, and a manual override control for on-load release (also known as emergency release), making the simple operation of the soft release wire extremely complex.

[0019] 3. Insufficient interlocking reliability:

[0020] A lockable hydrostatic pressure unit is provided to prevent the lifeboat hook from accidentally detaching before it enters the water (see...). Figure 1 In section ③, due to the special nature of seawater or the weather or environment on the water, the water buoy of this unit often malfunctions under abnormally low temperature operating conditions. The key interlocking power source "water float" is prone to corrosion and the formation of voids, leading to failure. In addition, it also needs to be returned to its original position during the recovery and operation of the lifeboat.

[0021] In addition, the connectors between the subsystems are as follows: (see...) Figure 1 middle Flexible release steel wire and see Figure 1 middle In cases of accidental misoperation of the release lever, the interlocking components may experience issues such as entanglement, knots, or corrosion from seawater in the steel wires. Utility Model Content

[0022] The purpose of this invention is to provide a lifeboat carrying and releasing system that helps simplify the composition of the hook system and makes it safer and more reliable.

[0023] The technical solution of this utility model is as follows: a lifeboat carrying and releasing system, including a davit hook rotatably connected to the bow and stern of the lifeboat, wherein the load-bearing point of the davit hook opening and the rotation center of the davit hook are located on the same vertical line, and the opening of the davit hook is provided with an anti-wire detachment structure that forms an envelope with the opening, and the bow and stern of the lifeboat are respectively vertically installed with double-acting jacks that drive the davit hook to rotate around the rotation center, and the lifeboat is provided with a control lever subsystem for controlling the action of the double-acting jacks, and the bottom plate of the lifeboat is provided with an internally locked hydrostatic pressure unit subsystem with liquid level sensing function for detecting whether the lifeboat has fallen into the sea or water surface.

[0024] Furthermore, the upper end of the plunger rod of the double-acting jack is hinged to a connecting rod, and the upper end of the connecting rod is hinged to the side of the davit hook away from the opening.

[0025] Furthermore, the control lever subsystem includes a four-way control valve installed on the oil inlet and return lines of the double-acting jack.

[0026] Furthermore, the double-acting jack is a manual or foot-operated double-acting hydraulic single-cylinder jack.

[0027] Furthermore, the oil inlet line of the double-acting jack located at the bow is connected to the oil inlet line of the double-acting jack located at the stern, and the oil return line of the double-acting jack located at the bow is connected to the oil return line of the double-acting jack located at the stern. The double-acting jacks located at the bow and the double-acting jacks located at the stern are controlled by the same four-way control valve and manual or foot pedal controller.

[0028] Furthermore, the internal locking hydrostatic pressure unit subsystem includes a container installed at the bottom of the lifeboat, with a water inlet at the lower end of the container, an exhaust structure at the top of the container, a float with a magnet inside the container, and a reed switch for controlling the power on and off of the instruction lights of the safety instrument circuit system installed at the top of the container.

[0029] Furthermore, a flange is connected to the lower end of the water inlet.

[0030] Furthermore, the indicator lights of the safety instrument circuit system and the manual selector switch of the four-way control valve are located on the same safety instrument panel.

[0031] Compared with the prior art, the present invention has the following advantages:

[0032] 1. The original hydrostatic pressure unit function is decomposed into two independent functions of "instruction panel" and "four-way control valve conversion". And the liquid level and electromagnetic field are used to replace the mechanical limit control lever, and the original complex "mechanical interlocking" is improved into "liquid level sensor" mode, which realizes the optimization of invisible "internal lock control" into visual "safety dashboard" operation.

[0033] 2. The release system adopts the working type of double-acting hydraulic single-cylinder jack, and the four-way control valve replaces the traditional steel solid mechanical transmission member, which reduces the defects of "fast method" and improves the stability of overall operation.

[0034] 3. The lifting point force of the lifeboat is rotated by the rotation of the boat hook, that is, the over-center lifting design adopts the center lifting design and the double-acting jack "unhooking and resetting" operation.

[0035] 4. The method of changing harm into benefit, that is, using the action point of physical force and the characteristics of the boat hook rotation center to overcome the residual "deflection force" in the operation of the original typical structure; using the "bidirectional" source power generated by the jack to reduce the defects of "inherent instability", and to improve the possibility of resisting the accidental falling or resetting of the boat hook.

[0036] 5. The system is safer and more reliable; the function is special and the structure greatly improves the reserve buoyancy of the boat body. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 It is a structure diagram of the existing typical bearing release system;

[0038] Figure 2 It is a release flowchart of the existing lifeboat release device;

[0039] Figure 3 It is a working principle diagram of the existing cam over-center boat hook system;

[0040] Figure 4 It is a working principle diagram of the existing cam over-center boat hook system;

[0041] Figure 5 It is a structure diagram of the existing release system lever;

[0042] Figure 6 It is a schematic diagram of the existing lifeboat hook accidental falling prevention with internal lock hydrostatic pressure unit before the lifeboat enters the water;

[0043] Figure 7 It is a schematic diagram of the boat hook in use of the utility model;

[0044] Figure 8 It is a schematic diagram of the actual installation structure of the boat hook of the utility model;

[0045] Figure 9 The utility model discloses a joystick subsystem schematic diagram;

[0046] Figure 10 The utility model discloses an internal locking hydrostatic pressure unit subsystem structure diagram;

[0047] Figure 11 The utility model discloses a safety instrument panel structure schematic diagram;

[0048] In the drawing: 10 - davit 11 - opening 12 - bearing stress point 13 - rotation center point 14 - blocking rod 20 - double -acting jack 20a - one double -acting jack 20b - another double -acting jack 21 - first pipeline 22 - second pipeline 23 - third pipeline 24 - fourth pipeline 25 - fifth pipeline 26 - sixth pipeline 27 - connecting rod 30 - four -way control valve 31 - manual change-over switch 40 - hydraulic cylinder 41 - hydraulic container 51 - container 52 - water inlet 53 - flange plate 54 - exhaust structure 55 - float ball 56 - magnetic reed switch 57 - safety instrument panel 58 - command light. DETAILED DESCRIPTION

[0049] In order to make the above features and advantages of the utility model more obvious, the following embodiment is taken, and the detailed description is made as follows by combining with the drawings, but the utility model is not limited to this.

[0050] Reference Figures 7 to 11

[0051] A lifeboat bearing release system, comprising a davit 10 rotatably connected to the bow and stern of a lifeboat, wherein the opening 11 of the davit, the bearing stress point 12 of the davit wire hook in the davit lifting, and the rotation center point 13 of the davit are located on the same vertical line. The rotation center point is the rotation shaft center of the hinge between the davit and the lifeboat, so that when the davit is hooked with the davit wire hook, the bearing stress point and the rotation center point are located on the same vertical line, and the davit has no rotation force, thereby reducing the need for additional accessories such as safety pins in other typical similar structures to prevent accidents, simplifying the device structure, and solving the internal instability of the typical davit. The davit wire hook can realize the process of lifeboat release, recovery and storage, and the tension line of the davit wire passes through the rotation center point to form a bearing, that is, the davit is "locked". The opening of the davit is provided with a steel wire escape prevention structure which forms an envelope with the opening. The steel wire escape prevention structure is a blocking rod 14 arranged on the lifeboat and extending into the opening when the davit is hooked with the davit wire hook, so that the davit wire cannot fall out of the hook head.

[0052] In this embodiment, the bow and stern of the lifeboat are respectively vertically installed with double-acting jacks 20 for driving the hanger hook to rotate around the center of rotation to achieve active unhooking or automatic resetting. The lifeboat is provided with a control lever sub-system for controlling the extension or retraction of the double-acting jack. The control lever sub-system includes a four-way control valve 30 arranged on the oil inlet pipeline and oil return pipeline of the double-acting jack, and the pipeline of the double-acting jack is manually switched through the four-way control valve. The bottom plate of the lifeboat is provided with an internal locking hydrostatic pressure unit sub-system with liquid level sensing function for detecting whether the lifeboat falls into the sea or the water surface.

[0053] Specifically, the upper end of the plunger rod of the double-acting jack is hinged with a connecting rod 27, and the upper end of the connecting rod is hinged with the hanger hook on the side away from the opening. The hinged point is on the same horizontal line as the load bearing point of the hanger hook when the hanger hook is hooked with the hanger steel wire. In another embodiment, a rocker structure can be used to connect the connecting rod 27 to realize the connection between the hanger hook and the double-acting jack. Figure 8

[0054] Specifically, the double-acting jack is designed as a "mini single-cylinder jack", such as a manual or pedal type double-acting hydraulic single-cylinder jack, thereby helping to reduce the complexity of the release system. This structure also helps to avoid the weaknesses of corrosion, bending and knotting of flexible release steel wire.

[0055] Specifically, the oil inlet pipeline of the double-acting jack located at the bow is connected with the oil inlet pipeline of the double-acting jack located at the stern, the oil return pipeline of the double-acting jack located at the bow is connected with the oil return pipeline of the double-acting jack located at the stern, and the double-acting jack located at the bow and the double-acting jack located at the stern are controlled by the same four-way control valve and manual or pedal controller.

[0056] For example, the port of the manual or pedal controller (hydraulic cylinder) 40 is connected with the first port of the four-way control valve through the first pipeline 21, the second port of the four-way control valve is connected with the oil inlet port of one of the double-acting jacks 20a through the second pipeline 22, the port on the hydraulic container 41 connected with the lower end of the manual or pedal controller is connected with the third port of the four-way control valve through the third pipeline 23, the fourth port of the four-way control valve is connected with the oil return port of one of the double-acting jacks through the fourth pipeline 24, the oil inlet port of the other double-acting jack 20b is connected with the second pipeline through the fifth pipeline 25, and the oil return pipeline of the other double-acting jack is connected with the fourth pipeline through the sixth pipeline 26. Thus, the two double-acting jacks are controlled by the same manual or pedal controller and four-way control valve.

[0057] ​When pressed down, the hydraulic cylinder 40 and the hydraulic container 41 squeeze the liquid to generate a lifting force, which is transmitted to the plunger rod of the double-acting jack; the plunger rod of the double-acting jack is forced, as the force of the bow and stern of the lifeboat, to generate the external force required for unhooking or resetting the davit hook.

[0058] Specifically, the inner locking hydrostatic pressure unit subsystem includes a container 51 mounted on the bottom of the lifeboat, the lower end of the container is provided with a water inlet 52, the lower end of the water inlet is fixed with a flange plate 53 in sealing connection with the bottom plate of the lifeboat, so as to realize the mounting and fixing of the container and prevent water from entering the lifeboat. The top of the container is provided with an exhaust structure 54, the top of the inner cavity of the container is connected with a floating ball 55 with a magnet through a rope, and a magnetic reed switch 56 is mounted on the top of the container, so as to control the on-off of the command light 58 of the safety instrument circuit system. The command light of the safety instrument circuit system and the manual transfer switch 31 of the four-way control valve are arranged on the same safety instrument panel 57.

[0059] The principle of the inner locking hydrostatic pressure unit subsystem is that the position of the floating ball with a magnet in the measured medium is affected by the buoyancy: the change of the liquid level causes the change of the position of the floating ball; the magnet in the floating ball and the magnetic reed switch act on the elements (such as fixed value resistance) connected in series to cause the change of the number of the elements; and then the electrical quantity of the safety instrument circuit system changes, for example, the command light changes from red to green, which can help the correct decision of the operator. When the lifeboat falls into the sea or the water surface, the sea water pressure in the container causes the lifting force of the sea water in the container, so that the position of the floating ball changes; the magnet in the floating ball and the magnetic reed switch conduct the change of the magnetic field, and the magnetic reed switch is started.

[0060] By arranging the indicating light and the manual transfer switch of the four-way control valve on the same safety instrument panel, the visual prompt of "constraint control" in the operation of the lifeboat load release mechanism (On Load Release) and the non-load release mechanism (Off Load Release) can be realized, so that the invisible "internal locking control" is optimized to the visual "safety instrument panel" operation.

[0061] If the utility model discloses or involves mutually fixed connection parts or structural members, except for another declaration, fixed connection can be understood as: detachable fixed connection (for example, using bolt or screw connection), also can be understood as: non-detachable fixed connection (for example, riveting, welding), of course, mutual fixed connection can be replaced by integral structure (for example, using casting process integral forming manufacturing) (obviously, cannot adopt integral forming process except for).

[0062] In addition, the terms used to represent the position relationship or shape in any of the above technical solutions disclosed by the utility model include the state or shape similar, similar or close to the above terms, except for another declaration.

[0063] Any component provided by the utility model can be assembled from multiple separate components, or can be a separate component manufactured by one-piece forming process.

[0064] The above is only the preferred embodiment of the utility model, and any change and modification made according to the patent application scope of the utility model shall belong to the coverage range of the utility model.

Claims

1. A lifeboat carrying and releasing system, comprising a davit rotatably connected to the bow and stern of the lifeboat, characterized in that, The load-bearing point of the davit hook opening and the rotation center of the davit hook are located on the same vertical line. The davit hook opening is equipped with a structure that forms an envelope with the opening to prevent the steel wire from coming off. The bow and stern of the lifeboat are respectively vertically equipped with double-acting jacks that drive the davit hook to rotate around the rotation center. The lifeboat is equipped with a control lever subsystem for controlling the action of the double-acting jacks. The bottom plate of the lifeboat is equipped with an internally locked hydrostatic pressure unit subsystem with liquid level sensing function for detecting whether the lifeboat has fallen into the sea or water surface.

2. The lifeboat carrying and releasing system according to claim 1, characterized in that, The upper end of the plunger rod of the double-acting jack is hinged to a connecting rod, and the upper end of the connecting rod is hinged to the side of the davit hook away from the opening.

3. The lifeboat carrying and releasing system according to claim 1 or 2, characterized in that, The control lever subsystem includes a four-way control valve installed on the oil inlet and return lines of the double-acting jack.

4. The lifeboat carrying and releasing system according to claim 3, characterized in that, The double-acting jack is a manual or foot-operated double-acting hydraulic single-cylinder jack.

5. The lifeboat carrying and releasing system according to claim 4, characterized in that, The oil inlet line of the double-acting jack located at the bow is connected to the oil inlet line of the double-acting jack located at the stern, and the oil return line of the double-acting jack located at the bow is connected to the oil return line of the double-acting jack located at the stern. The double-acting jacks located at the bow and the double-acting jacks located at the stern are controlled by the same four-way control valve and manual or foot pedal controller.

6. The lifeboat carrying and releasing system according to claim 3, characterized in that, The internal locking hydrostatic pressure unit subsystem includes a container installed at the bottom of the lifeboat. The lower end of the container is provided with a water inlet, the top of the container is provided with an exhaust structure, the inner cavity of the container is provided with a float with a magnet, and the top of the container is equipped with a reed switch for controlling the power on and off of the instruction lights of the safety instrument circuit system.

7. The lifeboat carrying and releasing system according to claim 6, characterized in that, A flange is connected to the lower end of the water inlet.

8. The lifeboat carrying and releasing system according to claim 6, characterized in that, The indicator lights of the safety instrument circuit system and the manual selector switch of the four-way control valve are located on the same safety instrument panel.

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