An underwater unattended hook lifting hook connection device

Abstract

The utility model provides a kind of underwater unmanned unhooking's lifting hook connecting device, for and lifting hook connection hoist, including lug plate, constraint base, pin shaft, drawing guide mechanism and unhooking cable, the lug plate is used to connect with lifting rope, the constraint base is connected in lug plate, the pin shaft is installed in lug plate, and it is located in constraint base, the pin shaft can be axially moved in lug plate and constraint base, the pin shaft is used to insert into lifting hook, the constraint base is also equipped with the constraint structure for the position of pin shaft constraint prevents falling;The unhooking cable passes through drawing guide mechanism and is connected with pin shaft end, and unhooking cable forms drawing force section between drawing guide mechanism and pin shaft, when unhooking cable is pulled, drawing force section can exert tension on pin shaft in pin shaft axial direction.

Description

Technical Field

[0001] This utility model relates to the field of hoisting equipment technology, and in particular to a hook connection device for underwater unmanned unhooking. Background Technology

[0002] In marine engineering, water conservancy and hydropower, channel dredging, and the installation and maintenance of underwater structures, underwater hoisting and retrieval of heavy objects are frequent and critical processes. Traditional underwater hook-and-unhook operations mainly rely on manual labor by divers: divers must descend to the hoisting point, insert or withdraw the hook by feel, and then confirm with surface personnel via hand gestures or underwater communication. This method is not only limited by water depth, visibility, current speed, temperature, and the diver's physical condition, but also carries high risks of decompression sickness, entanglement, and disorientation. Furthermore, each operation requires a professional diving team and life support system, resulting in high daily costs, and operations can be interrupted in case of sudden sea conditions, leading to low efficiency and short window periods.

[0003] To replace the "human wave" approach, existing technologies have developed specialized underwater unhooking devices powered by hydraulics. These devices drive cylinders to push locking pins or rotate the hook to achieve remote unhooking. However, these devices require complex underwater sealing oil circuits and high-pressure interfaces, resulting in bulky structures, high costs, and additional requirements on the lifting capacity of the work platform and ROV interfaces. Furthermore, hydraulic oil leaks can pollute the water and cause device failure, highlighting significant environmental and reliability issues. In addition, hydraulic systems are susceptible to intrusion from silt, fishing nets, and seaweed in shallow waters, leading to high failure rates and difficult on-site maintenance, often still requiring emergency intervention by divers, failing to fundamentally eliminate reliance on diving for safety. As nearshore resource development expands into the deep sea, and environmental requirements for inland rivers and reservoirs become increasingly stringent, the market urgently needs a new unhooking solution that is "extremely simple in structure, requires no diving, requires no underwater energy, and poses no pollution risk." Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide an underwater unmanned hook connection device, which has a simple structure, is easy to operate, and facilitates quick disconnection from the hook on the water.

[0005] To achieve the above objectives, this utility model provides an underwater unmanned hook connection device for connecting to a hook for lifting. It includes a lifting lug plate, a constraint base, a pin, a pull-out guide mechanism, and a release cable. The lifting lug plate is used to connect to the lifting rope. The constraint base is connected to the lifting lug plate. The pin is installed in the lifting lug plate and located in the constraint base. The pin can move axially between the lifting lug plate and the constraint base. The pin is used to insert into the hook. The constraint base also has a constraint structure to constrain the position of the pin and prevent it from falling. The release cable passes through the pull-out guide mechanism and is connected to the end of the pin. The release cable forms a pull-out force-applying section between the pull-out guide mechanism and the pin. When the release cable is pulled, the pull-out force-applying section can apply a tensile force to the pin axially.

[0006] Furthermore, the pull-out guide mechanism includes a constraint channel through which the axis of the pin passes and the release cable passes.

[0007] Furthermore, the pull-out guide mechanism includes two side guide cylinders and an upper guide cylinder located at the upper ends of the two side guide cylinders, and the space below the upper guide cylinder and between the two side guide cylinders is a limiting channel.

[0008] Furthermore, both the side guide cylinder and the upper guide cylinder are hollow tubular structures.

[0009] Furthermore, the constraint structure of the constraint base includes a constraint guide hole and an anti-detachment stop, the pin is located in the constraint guide hole, and the pin can slide in the constraint guide hole and abut against the anti-detachment stop.

[0010] Furthermore, the constraint base and the lifting lug plate are connected by a flexible connection, and the constraint base can be positioned relative to the lifting lug plate through the flexible connection.

[0011] Furthermore, the flexible connection includes at least two connecting ropes, with each end of the connecting rope connected to the constraint base and the lifting lug plate, respectively.

[0012] Furthermore, it also includes a counterweight mechanism installed on the constraint base.

[0013] As described above, the hook connecting device of this utility model has the following beneficial effects:

[0014] 1. By setting up a lifting lug plate and an axially movable pin, it is stably connected to the hook. By setting up a constraint base, a pull guide mechanism, and a release cable, the release cable pulls the pin, and the pull guide mechanism stabilizes the position of the release cable, forming a pull force section that can apply a stable pulling force to the pin in the axial direction. This ensures that the pin can be easily pulled out of the hook and is stably held in the constraint base without falling, thus ensuring operational stability. The entire hook connection assembly has a simple structure and is easy to operate. It only requires pulling the release cable on the water, without the need for complex pneumatic or electric structures or underwater operations.

[0015] 2. By setting up a pull-out guiding mechanism including an upper guide cylinder and two side guide cylinders, the position of the unhooking cable when it is pulled can be stabilized, and a pull-out force application section with a small angle with the shaft pin can be obtained, thereby reducing the radial component force, increasing the axial component force, and reducing the pulling force required for the unhooking cable.

[0016] 3. By setting up a flexible connection, the relative position between the constraint base and the lifting lug plate is not fixed, and it has a certain degree of flexibility to prevent the positions of the two from affecting each other, and to ensure that the pin can be aligned with the shaft hole and hook in the lifting lug plate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the hook connection device of this utility model.

[0018] Figure 2 This is a front view of the hook connecting device of this utility model.

[0019] Figure 3 This is a side view of the hook connecting device of this utility model.

[0020] Figure 4 This is a top view of the hook connection device of this utility model.

[0021] Explanation of icon numbers:

[0022] 1-Hook, 2-Lifting lug plate, 3-Constraint base, 4-Flexible connection, 5-Pin, 6-Unhooking cable, 61-Pull-out force application section, 7-Pull-out guide mechanism, 71-Side guide cylinder, 72-Upper guide cylinder, 8-Counterweight, 9-Lifting rope. Detailed Implementation

[0023] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0024] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0025] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0026] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0027] See Figures 1 to 4 This utility model provides an underwater unmanned hook connection device for connecting to a hook 1 for lifting. It includes a lifting lug plate 2, a constraint base 3, a pin 5, a pull-out guide mechanism 7, and a release cable 6. The lifting lug plate 2 is connected to a lifting rope 9. The constraint base 3 is connected to the lifting lug plate 2. The pin 5 is installed in the lifting lug plate 2 and located in the constraint base 3. The pin 5 can move axially between the lifting lug plate 2 and the constraint base 3. The pin 5 is inserted into the hook 1 to connect the lifting lug plate 2 and the hook 1. The constraint base 3 also has a constraint structure to constrain the position of the pin 5 and prevent it from falling. The release cable 6 passes through the pull-out guide mechanism 7 and is connected to the end of the pin 5. The release cable 6 forms a pull-out force application section 61 between the pull-out guide mechanism 7 and the pin 5. When the release cable 6 is pulled, the pull-out force application section 61 can apply a pulling force to the pin 5 axially.

[0028] The basic working principle of the hook connecting device involved in this utility model is as follows: The hook connecting device can facilitate underwater unhooking operations. During normal operation, the pin 5 is located in the shaft hole for the lifting lug 2 and inserted into the hook 1, thereby connecting the lifting lug 2 and the hook 1. The lifting rope 9 pulls up the lifting lug 2, and the lifting lug 2 pulls up the hook 1 through the pin 5, thereby performing the lifting operation. When unhooking is required, it is only necessary to pull the unhooking cable 6. Due to the constraint of the pull-out guide mechanism 7, a stable pull-out force section 61 is formed. The pull-out force section 61 can be kept parallel or at a small angle to the pin 5, so that the pull-out force section 61 can apply a pulling force to the pin 5 in the axial direction, while the radial component force is very small, thus effectively pulling the pin 5 out of the hook 1 and the lifting lug 2, ensuring that the hook 1 and the lifting lug 2 can be stably separated. At the same time, the constraint structure of the constraint base 3 can prevent the pin 5 from falling and keep it on the constraint base 3. The hook connection device of this utility model does not require underwater operation. The hook can be removed simply by pulling the release cable 6 on the water. The hook connection device has a simple structure and is easy to operate, making it convenient to quickly disconnect from the hook 1 on the water.

[0029] See Figures 1 to 4 The present invention will be further described below with reference to specific embodiments:

[0030] In this embodiment, see Figure 2 , Figure 3 and Figure 4 As a preferred design, the pull-out guide mechanism 7 includes a constraint channel through which the axis of the pin 5 passes and the release cable 6 passes. The limit channel restricts the position of the pull-out force application section 61 in the up, down, left, and right directions, thereby ensuring that the angle between the pull-out force application section 61 and the pin 5 is maintained when the release cable 6 is pulled. This ensures that the radial force is kept within a very small range, making it easier to pull out the pin 5 and saving pulling force.

[0031] In this embodiment, further, see Figure 2 , Figure 3 and Figure 4The pull-out guide mechanism 7 includes two side guide cylinders 71 and an upper guide cylinder 72 located at the upper ends of the two side guide cylinders 71. The space below the upper guide cylinder 72 and between the two side guide cylinders 71 serves as a limiting channel. Thus, the upper and left / right sides of the limiting channel are cylindrical surfaces. When the release cable 6 is pulled, even if the release cable 6 contacts and moves with the upper guide cylinder 72 or the side guide cylinders 71, resistance is reduced, and stress concentration leading to breakage of the release cable 6 is avoided. Preferably, both the side guide cylinders 71 and the upper guide cylinder 72 are hollow tubular structures to reduce lifting weight. In this embodiment, the upper guide cylinder 72 and the two side guide cylinders 71 of the pull-out guide mechanism 7 have an appropriate distance from the constraint base 3, thereby ensuring that the pull-out force application section 61 of the release cable 6 has an appropriate length.

[0032] In this embodiment, as a preferred design, the unhooking cable 6 can be a regular rope, wire rope, or chain.

[0033] In this embodiment, the constraint base 3 can adopt a material frame structure to minimize mass while ensuring structural strength. The constraint structure of the constraint base 3 may include a constraint guide hole and an anti-detachment stop. The pin 5 is located in the constraint guide hole and can slide within it, abutting against the anti-detachment stop. This provides stable guidance for the axial movement of the pin 5 and prevents it from detaching and falling off. In other embodiments, the constraint structure can also adopt other suitable structures that can constrain the position of the pin on the constraint base 3 to prevent it from falling off.

[0034] In this embodiment, as a preferred design, see [reference needed]. Figure 2 , Figure 3 and Figure 4 The constraint base 3 and the lifting lug 2 are connected by a flexible connection 4. This allows the constraint base 3 to maintain a certain relative position with the lifting lug 2, particularly a certain rotation angle. This flexibility allows the relative position between the constraint base 3 and the lifting lug 2 to be flexible, preventing mutual interference and ensuring that the pin 5 can be aligned with the shaft hole and hook 1 in the lifting lug 2. Furthermore, the flexible connection 4 includes multiple connecting ropes, through which the constraint base 3 is suspended from the lifting lug 2, facilitating relative movement. In other embodiments, the flexible connection 4 can also employ other existing suitable structures that achieve the aforementioned flexible connection.

[0035] In this embodiment, as a preferred design, see [reference needed]. Figure 2 , Figure 3 and Figure 4It also includes a counterweight mechanism installed on the constraint base 3 to balance the weight distribution of the entire hook connection device in the horizontal direction. Preferably, the counterweight mechanism includes multiple counterweight parts 8, with several counterweight parts 8 arranged on the side opposite to the pull-out guide mechanism 7. That is, these counterweight parts 8 and the pull-out guide mechanism 7 are arranged on the front and rear sides of the constraint base 3 to balance the weight of the pull-out guide mechanism 7.

[0036] As can be seen from the above, the hook connecting device of this utility model has the following beneficial effects:

[0037] 1. By setting up the lifting lug plate 2 and the axially movable pin 5, it is stably connected to the hook 1. By setting up the constraint base 3, the pull guide mechanism 7 and the release cable 6, the release cable 6 pulls the pin 5, and the pull guide mechanism 7 stabilizes the position of the release cable 6, forming a pull force section 61 that can apply a stable pulling force to the pin 5 in the axial direction. This ensures that the pin 5 can be easily pulled out of the hook 1 and is stably held in the constraint base 3 without falling, thus ensuring working stability. The entire hook 1 connection assembly has a simple structure and is easy to operate. It only requires pulling the release cable 6 on the water. There is no need to configure a complex pneumatic or electric structure, nor is underwater operation required.

[0038] 2. By setting up a pull-out guide mechanism 7 including an upper guide cylinder 72 and two side guide cylinders 71, the position of the unhooking cable 6 when it is pulled can be stabilized, and a pull-out force application section 61 with a small angle with the shaft pin can be obtained, thereby reducing the radial component force, increasing the axial component force, and reducing the pulling force required for the unhooking cable 6.

[0039] 3. By setting up a flexible connection 4, the relative position between the constraint base 3 and the lifting lug plate 2 is not fixed, and has a certain degree of flexibility, to prevent the positions of the two from affecting each other, and to ensure that the pin 5 can be aligned with the shaft hole and the hook 1 in the lifting lug plate 2.

[0040] In summary, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0041] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An underwater unmanned hook connection device for connecting to a hook (1) for lifting, comprising a lifting lug plate (2), a constraint base (3), a pin (5), a pull-out guide mechanism (7), and a release cable (6), wherein the lifting lug plate (2) is used to connect to a lifting rope (9), the constraint base (3) is connected to the lifting lug plate (2), the pin (5) is installed in the lifting lug plate (2) and located in the constraint base (3), and the pin (5) is axially movable in the lifting lug plate (2) and the constraint base (3). The pin (5) is inserted into the hook (1) and the constraint base (3) is also provided with a constraint structure to constrain the position of the pin (5) and prevent it from falling. The unhooking cable (6) passes through the pull guide mechanism (7) and is connected to the end of the pin (5). The unhooking cable (6) forms a pull force section (61) between the pull guide mechanism (7) and the pin (5). When the unhooking cable (6) is pulled, the pull force section (61) can apply a pulling force to the pin (5) in the axial direction.

2. The hook connecting device according to claim 1, characterized in that: The pull-out guide mechanism (7) includes a constraint channel through which the axis of the pin (5) passes and the release cable (6) passes.

3. The hook connecting device according to claim 2, characterized in that: The pull-out guide mechanism (7) includes two side guide cylinders (71) and an upper guide cylinder (72) located at the upper end of the two side guide cylinders (71), and the space below the upper guide cylinder (72) and between the two side guide cylinders (71) is a limiting channel.

4. The hook connecting device according to claim 3, characterized in that: Both the side guide cylinder (71) and the upper guide cylinder (72) are hollow tubular structures.

5. The hook connecting device according to claim 1, characterized in that: The constraint structure of the constraint base (3) includes a constraint guide hole and an anti-detachment stop. The pin (5) is located in the constraint guide hole and can slide in the constraint guide hole and abut against the anti-detachment stop.

6. The hook connecting device according to claim 1, characterized in that: The constraint base (3) and the lifting lug plate (2) are connected by a soft connection (4), and the constraint base (3) can be positioned relative to the lifting lug plate (2) through the soft connection (4).

7. The hook connecting device according to claim 6, characterized in that: The flexible connection (4) includes at least two connecting ropes, the two ends of which are connected to the constraint base (3) and the lifting plate (2) respectively.

8. The hook connecting device according to claim 1, characterized in that: It also includes a counterweight mechanism installed on the constraint base (3).

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