Underwater implement mechanical unhooking device

Abstract

The mechanical unhooking device comprises two lifting ropes, a lifting ring and two unhooking devices, the length of the lifting ropes is adjusted according to the gravity center position, one ends of the lifting ropes are connected to the lifting ring at the same time, and the two unhooking devices are symmetrically arranged and arranged at one ends of the two lifting ropes in a closed mode; the unhooking device comprises a U-shaped clamp, a spring bolt barrel, a spring bolt column, an unhooking rope, a bolt unhooking frame, a first spring and a second spring. One end of the U-shaped clamp is connected with a spring bolt cylinder, a spring bolt column is arranged in the spring bolt cylinder in a sliding connection mode and can be inserted into the lock hole in a penetrating mode, and a second spring is arranged between the first check ring and the outer side of the U-shaped clamp. The other end of the spring bolt cylinder is connected with a bolt releasing frame, the bolt releasing frame is connected with a lock releasing rope, one end of the lock releasing rope is connected with a releasing pin, the other end of the lock releasing rope is connected with a hand buckle for pulling the lock releasing rope, and the releasing pin is connected to the bolt releasing frame in a sliding mode and can be embedded into the lock groove; a second check ring is arranged on the lower middle portion of the tripping pin, a first spring is arranged between the second check ring and the tongue disengaging frame, and underwater tripping is facilitated.

Description

Technical Field

[0001] This application relates to the field of underwater unhooking equipment technology, and in particular to a mechanical unhooking device for underwater objects. Background Technology

[0002] In underwater lifting operations, underwater objects such as vehicles, materials, and pipes need to be lifted from the surface to the underwater location using a crane and then detached from the hook at a suitable position. Unlike simple surface detachment, the underwater working environment is relatively complex. On the one hand, there is buoyancy and ocean currents underwater, causing objects to drift to some extent; on the other hand, there is pressure and corrosion underwater, making conventional surface detachment devices unsuitable for underwater operations. Initially, manual detachment is usually performed by diving to the detachment position, but this method is not only dangerous and difficult, but also unsuitable for long-term operations.

[0003] In existing technologies, designers apply surface hook release devices to underwater hook release operations, or design new underwater hook release devices by imitating surface hook release devices. For example, patent application CN 205555871 U, entitled "Automatic Unhooking Hydraulic Shackle," includes a remote control signal transmitter, a U-shaped shackle body, and pins inserted into pin holes at both ends of the shackle body. A support is fixed to the right end of the shackle body, and the support is equipped with a pin cylinder, a reversing valve, an accumulator, a pump station, and a local control module for controlling the operation of various electrical devices. The piston rod of the pin cylinder is detachably fixed to the pin. The pump port of the motor pump in the pump station is connected to the working port of the accumulator and the pressure port of the reversing valve. The return port of the reversing valve is connected back to the oil tank of the pump station. The two working ports of the reversing valve are respectively connected to the rod chamber and the rodless chamber of the pin cylinder. The local control module has a built-in remote control signal receiver. The shackle provided by this utility model is particularly suitable for high-altitude and underwater hoisting operations. For example, application publication number CN 103723613 A, entitled "A Remote Unhooking Device for Lifting and Deploying Underwater Vehicles," is used in conjunction with a crane during field tests of underwater vehicles to lift them from a shore base or mother ship to the sea surface, and to complete the unhooking action on the shore base or mother ship. It consists of a lifting ring body and an unhooking mechanism. The unhooking mechanism uses a load-bearing rod to lift the underwater vehicle, and a compression spring returns the load-bearing rod to its original position to complete the unhooking action. The axial return movement of the load-bearing rod is controlled by a positioning pin and a remote handbrake connected to the positioning pin. This invention can achieve remote unhooking of underwater vehicles, avoiding the personal safety problems caused by manual unhooking. Furthermore, unlike automatic unhooking devices that utilize the gravity of the underwater vehicle, the unhooking timing of this remote unhooking device is controlled by the operator through a remote handbrake, allowing for unhooking at any time. It is simple to operate and the unhooking is reliable.

[0004] Based on past experience, hydraulic or pneumatic unhooking devices often experience problems when submerged to a certain depth. This is because the pressure difference between the hydraulic or pneumatic system and the external water pressure decreases (and this pressure difference varies at different depths), reducing the hook's locking force. Issues with the hydraulic oil and water seals can also lead to unexpected disengagement. Furthermore, hydraulic oil leaks can pollute the water, making them unsuitable for prolonged lifting operations. Some electronic unhooking devices, when submerged, are prone to short circuits under water pressure and corrosion if even a small area is exposed or poorly sealed. This can cause premature or failed disengagement, necessitating manual intervention and increasing the difficulty and intensity of the work. Utility Model Content

[0005] To solve or partially solve the problems existing in related technologies, this application provides an underwater mechanical unhooking device. The unhooking device is entirely mechanically driven and can avoid the influence of water pressure and sealing requirements, whether underwater or on the surface. It can also avoid the influence of corrosion by electroplating corrosion-resistant materials or selecting corrosion-resistant materials, thereby reducing the impact of the underwater working environment on unhooking.

[0006] This application discloses an underwater object mechanical unhooking device, including: a hoisting rope, a hoisting ring, and an unhooking device. Two hoisting ropes are symmetrically arranged, with one end of each rope connected to the hoisting ring. Two unhooking devices are symmetrically arranged and enclosed at one end of the two hoisting ropes.

[0007] The unhooking device includes:

[0008] The U-shaped latch has symmetrical keyholes; and a latch cylinder.

[0009] The bolt has a first retaining ring and a locking groove at one end; and

[0010] The release cable is similar to a bicycle brake cable; and

[0011] Tongue release mechanism, first spring, second spring;

[0012] Among them, one end of the U-shaped card is connected to a locking tongue cylinder, and a locking tongue post is slidably installed inside the locking tongue cylinder so that the locking tongue post can be inserted into the lock hole. The second spring is set between the first retaining ring and the outside of the U-shaped card.

[0013] The other end of the locking tongue cylinder is connected to a release tongue bracket, and a release rope is connected to the release tongue bracket. One end of the release rope is connected to a release pin, and the other end is connected to a pull handle. The release pin slides on the release tongue bracket and can be embedded in the lock groove. The lower middle part of the release pin is constructed with a second retaining ring, and a first spring is constructed between the second retaining ring and the release tongue bracket.

[0014] Optionally, the U-shaped part of the U-shaped card is an arc plate, and the other two ends are set as axially symmetrical hexagonal plates, one side of which is fixed to the arc plate and integrally formed, and the lock hole is set at the center of the hexagonal plate.

[0015] Optionally, the locking tongue cylinder is configured as a cylindrical tube, one end of which is constructed with a connecting plate that abuts against one side of the U-shaped clip and is fastened to each other by screws; the other side of the locking tongue cylinder is constructed with internal threads and a connecting head is threadedly connected. The connecting head is constructed with a pin hole for the release pin to slide into and a pin hole for the locking tongue post to slide into. The locking tongue post slides into the pin hole, and the release pin slides into the pin hole. When the locking tongue post is in the locked state, the release pin slides into the connecting head and is embedded in the lock groove.

[0016] Optionally, the release tongue bracket is configured as a U-shaped bracket and fastened to both sides of the connector with screws; the release tongue bracket is configured to be perpendicular to the locking tongue cylinder so that the release pin is perpendicular to the locking tongue post.

[0017] Optionally, the outer ring of the first retaining ring is set close to the inner wall of the locking tongue cylinder, and when one side of the first retaining ring contacts the connector, one end of the locking tongue pin is exactly located inside the lock hole.

[0018] Optionally, a sealing setting is provided between the keyhole and the latch post.

[0019] Optionally, a gap may be constructed between the keyhole and the latch post.

[0020] Optionally, a wristband is provided at one end of the hand buckle, and the outer layer of the release rope is fixedly mounted on the wristband; the outer thread of the other end of the release rope is adjustablely mounted on the release tongue bracket, and the release pin is accommodated inside the release tongue bracket, leaving the first spring exposed.

[0021] Optionally, the wristband is designed with a square frame and has a rotatable grip on the side opposite to the release cord.

[0022] Optionally, all components are made of corrosion-resistant materials or have undergone corrosion-resistant treatment.

[0023] The technical solution provided in this application may include the following beneficial effects:

[0024] This device, designed entirely with mechanical structures, is not affected by water pressure when underwater. The structure, which uses two ropes and a lifting ring to connect the two release devices, places the entire device at the center of the lifting force, avoiding the influence of ocean currents and buoyancy. The device operates in the same underwater environment as it does on the surface, without any restrictions, thus reducing the difficulty and risk of releasing underwater objects.

[0025] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0026] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0027] Figure 1 This is a schematic diagram illustrating the structure during use as shown in the embodiments of this application;

[0028] Figure 2 This is a side view of the device in use as shown in an embodiment of this application;

[0029] Figure 3 This is a schematic diagram of the structure of the unhooker when locked, as shown in the embodiments of this application;

[0030] Figure 4 This is a schematic diagram of the structure of the unhooking device when it is disengaged, as shown in the embodiments of this application;

[0031] Figure 5 This is a cross-sectional view of the unhooker when locked, as shown in an embodiment of this application;

[0032] Figure 6 This is a cross-sectional view of the unhooking device when it is disengaged, as shown in an embodiment of this application;

[0033] Figure 7 This is a schematic diagram of the structure of the wristband shown in the embodiments of this application;

[0034] Figure label:

[0035] 1. Utensils; 11. Hanging lugs;

[0036] 2. Suspension rope;

[0037] 3. Hanging rings;

[0038] 4. Unhooking device; 41. U-shaped clip; 42. Locking tongue cylinder; 43. Locking tongue post; 44. Unhooking tongue bracket; 45. Unhooking rope; 46. Hand ring; 47. First spring; 48. Second spring;

[0039] 411. Lock hole; 421. Connecting plate; 422. Connector; 431. First retaining ring; 432. Lock groove; 451. Tripping pin; 452. Second retaining ring; 453. Hand buckle; 461. Grip. Detailed Implementation

[0040] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0041] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0042] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0043] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] To address the aforementioned problems, this application provides a mechanical unhooking device for underwater objects. The technical solution of this application embodiment is described in detail below with reference to the accompanying drawings.

[0045] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The underwater object mechanical unhooking device shown includes: a lifting rope 2, a lifting ring 3, and a unhooking device 4. Two lifting ropes 2 are symmetrically arranged, with one end of each rope connected to the lifting ring 3. Two unhooking devices 4 are symmetrically arranged and enclosed at one end of the two lifting ropes 2. Thus, the lifting ring 3 is first connected by a symmetrical lifting rope 2, and then the lifting ring 3 is hooked by a hook on a crane. This ensures that the unhooking devices 4 at both ends of the lifting rope 2 are in a symmetrical state of force with the lifting ring 3 as the center, preventing them from tilting.

[0046] The unhooking device 4 used in this application adopts a purely mechanical structure, and its drive is manually operated. Specifically, as follows: Figure 3 and Figure 4 As shown, it exists in two states: a locked state and a released state, both of which are achieved through manual mechanical control. Specifically, the release device 4 includes:

[0047] The U-shaped clip 41 has an arc-shaped plate at the U-shaped position and symmetrical hexagonal plates at the other two ends. A locking hole 411 is symmetrically constructed at the center of the hexagonal plate. When lifting objects, two protruding lifting lugs 11 are set on the object 1, and then the U-shaped clip 41 is nested on them. When locked, the locking tongue passes through the lifting lugs 11 to connect the U-shaped clip 41. In this way, the U-shaped clip 41 and the lifting lugs 11 can only rotate tightly around the locking tongue as the rotation center, without any axial or other directional sliding movement. This avoids the lifting lugs 11 and the U-shaped clip 41 from being misaligned due to the influence of underwater currents and buoyancy, which would make it inconvenient to disengage.

[0048] To accommodate the above structure, this application also includes a locking tongue cylinder 42 and a locking tongue post 43 slidably connected within the locking tongue cylinder 42. The locking tongue cylinder 42 is a cylindrical cylinder, and the locking tongue post 43 is columnar. One end of the locking tongue cylinder 42 has a connecting plate 421 that abuts against one side of the U-shaped clip 41 and is fastened to each other by screws, thus facilitating positioning, connection, and fastening. The locking tongue post 43 has a first retaining ring 431 and a locking groove 432 at one end. This application also includes a release rope 45, which is similar to a bicycle brake cable; a release tongue bracket 44; a first spring 47; and a second spring 48.

[0049] Among them, one end of the U-shaped card 41 is connected to the locking tongue cylinder 42, and the locking tongue post 43 is slidably provided in the locking tongue cylinder 42 so that the locking tongue post 43 can be inserted into the lock hole 411. The second spring 48 is provided between the first retaining ring 431 and the outer side of the U-shaped card 41.

[0050] The other end of the locking tongue cylinder 42 is connected to a release tongue bracket 44, and a release rope 45 is connected to the release tongue bracket 44. One end of the release rope 45 is connected to a release pin 451, and the other end is connected to a pull handle 453. The release pin 451 slides on the release tongue bracket 44 and can be embedded in the locking groove 432. The lower middle part of the release pin 451 is constructed with a second retaining ring 452, and a first spring 47 is constructed between the second retaining ring 452 and the release tongue bracket 44.

[0051] Thus, this application adopts a purely mechanical structure to achieve locking and unlocking. In the process of use, the specific operation of locking the object 1 on the water surface is to insert the U-shaped card 41 into the lifting lug 11 of the object 1, manually press the locking tongue 43 to overcome the second spring 48 so that one end of the locking tongue 43 passes through the lifting lug 11 and is inserted into the lock hole 411. At this time, the release pin 451 is pressed and embedded into the lock groove 432 under the elastic force of the first spring 47 to prevent the locking tongue 43 from retracting under the elastic force of the second spring 48. At this time, the entire release device 4 is in the state of locking the object 1. Connect the release device 4 with the lifting rope 2 and the lifting ring 3. At this time, the lifting equipment can be used to hook the lifting ring 3 to lift the object 1 and put it below the water surface. When object 1 is hoisted to the required depth, simply pull the hand buckle 453 of the release rope 45 manually. The release rope 45 overcomes the elastic force of the first spring 47 and is pulled out from the lock groove 432. The lock tongue 43, no longer restrained, returns to its original position under the elastic force of the second spring 48, thereby causing the lock tongue 43 to disengage from the lifting lug 11 and object 1 to fall out of the U-shaped clip 41, completing the release.

[0052] In this application, a brake cable similar to that of a bicycle is used as the release control line. It has an outer shell and a steel wire rope housed within the shell. One end of the steel wire rope is connected to a release pin 451, which moves with the sliding of the steel wire rope. The other end of the outer shell is fixed to the release tongue bracket 44. This allows the release pin 451 to move relative to the locking groove 432, achieving locking and releasing. The entire process utilizes a mechanical structure. When the equipment is underwater, it is not affected by water pressure. The structure using two lifting ropes 2 and a lifting ring 3 connecting the two release devices 4 places the entire equipment at the center of the lifting force, avoiding the influence of ocean currents and buoyancy. The entire equipment operates in the same underwater environment as on the surface, without restrictions, reducing the difficulty and risk of releasing underwater objects.

[0053] In one embodiment, to facilitate the installation and assembly of the entire structure, such as Figure 3 Figure 4 and 6As shown, the locking tongue cylinder 42 is a cylindrical tube. One end has a connecting plate 421 that abuts against one side of the U-shaped clip 41 and is fastened to each other by screws. The other side of the locking tongue cylinder 42 has an internal thread and a connecting head 422 is threadedly connected to it. The connecting head 422 has a pin hole for the release pin 451 to slide into and a pin hole for the locking tongue post 43 to slide into. The locking tongue post 43 slides into the pin hole, and the release pin 451 slides into the pin hole. When the locking tongue post 43 is in the locked state, the release pin 451 slides into the connecting head 422 and is embedded in the lock groove 432. In this way, the locking tongue post 43 and the second spring 48 are very convenient to connect. A stepped cylinder can also be set inside the locking tongue cylinder 42. By connecting the connecting heads 422 of different depths, the position of the locking tongue post 43 in the lock hole 411 when it is released can be adjusted. This avoids the situation where the locking tongue post 43 protrudes and affects the release due to long-term use.

[0054] In one embodiment, such as Figure 3 Figure 4 As shown, in order to facilitate the sliding of the release pin 451 driven by the release rope 45 when the release is triggered, the release tongue bracket 44 is set as a U-shaped bracket and is fastened to both sides of the connector 422 by screws; the release tongue bracket 44 is set vertically to the locking tongue cylinder 42 so that the release pin 451 is vertically to the locking tongue post 43.

[0055] In one embodiment, such as Figure 6 As shown, a sealing arrangement is provided between the lock hole 411 and the lock tongue post 43. The outer ring wall of the first retaining ring 431 is closely attached to the inner cylinder wall of the lock tongue cylinder 42. When one side of the first retaining ring 431 contacts the connector 422, one end of the lock tongue post 43 is exactly located inside the lock hole 411, thus preventing water from entering the lock tongue post 43.

[0056] In one embodiment, unlike the above implementation, a gap is constructed between the lock hole 411 and the locking tongue post 43, and the outer thread of the other end of the release rope 45 is adjustablely set on the release tongue frame 44. The release pin 451 is accommodated inside the release tongue frame 44 and the first spring 47 is exposed, making the entire structure transparent and not affected by water pressure.

[0057] In one embodiment, such as Figure 6 and Figure 7As shown, since the object 1 is inevitably affected by ocean currents underwater, especially when operating in the open sea, after the object 1 is placed on the hull of the ship on the water surface, it is inevitable to make certain angle adjustments. This application adopts a method of symmetrically setting two lifting ropes 2, one end of which is connected to the lifting ring 3. Two release devices 4 are symmetrically set and closed at one end of the two lifting ropes 2. The joint release tongue frame 44 is set as a U-shaped frame and is fastened to both sides of the connector 422 with screws. A hand ring 46 is set at one end of the hand buckle 453. The outer layer of the release rope 45 is fixedly set on the hand ring 46. The hand ring 46 is set as a square frame and has a rotatable handle 461 on the side opposite to the release rope 45. In this way, when not releasing, the release rope 45 can be used as an adjustment control line to adjust the angle of the object 1. When the appropriate angle is adjusted, the hand buckle 453 can be pulled to release.

[0058] In one embodiment, all components are made of corrosion-resistant materials or have undergone corrosion-resistant treatment to prevent corrosion from seawater.

[0059] Finally, it should be noted that in this document, relationships such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "include," "contain," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0060] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0061] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An underwater rig unhooking apparatus, characterised in that, The utility model relates to a kind of unhooking device, including: Sling (2), ring (3), unhooker (4), the sling (2) is symmetrically provided two, one end is simultaneously connected in ring (3), the unhooker (4) is symmetrically provided two, enclosed in the one end of two slings (2); The unhooker (4) includes: U-shaped card (41), the U-shaped card (41) is symmetrically configured with lock hole (411) on it;And Lock tongue cylinder (42), and Lock tongue column (43), the lock tongue column (43) is configured with first retaining ring (431) on it, one end is configured with lock slot (432);And Unhooking rope (45), the unhooking rope (45) is similar to bicycle brake cable;And Lock tongue frame (44), first spring (47), second spring (48); Wherein, one end of U-shaped card (41) is connected to set lock tongue cylinder (42), lock tongue cylinder (42) is slidably connected with lock tongue column (43) and makes lock tongue column (43) can be inserted in lock hole (411), the second spring (48) is arranged between first retaining ring (431) and the outside of U-shaped card (41); The other end of lock tongue cylinder (42) is connected to set lock tongue frame (44), lock tongue frame (44) is connected to set unhooking rope (45) on it, one end of unhooking rope (45) is connected to set trip pin (451), the other end is connected to set hand buckle (453) for pulling it, trip pin (451) is slidably connected on lock tongue frame (44) and can be embedded into lock slot (432);The middle lower part of the trip pin (451) is configured with second retaining ring (452), and first spring (47) is configured and set between second retaining ring (452) and lock tongue frame (44).

2. An underwater object mechanical unhooking device according to claim 1, characterized in that: The U-shaped position of the U-shaped card (41) is arc-shaped plate, and the other two ends are set as hexagonal plates that are axisymmetric, one side of which is fixed with the arc-shaped plate and integrally formed, and the lock hole (411) is arranged at the center of the hexagonal plate.

3. An underwater object mechanical unhooking device according to claim 1, characterized in that: The lock tongue cylinder (42) is set as cylindrical cylinder, one end of which is configured with connecting plate (421) and one side of U-shaped card (41) abuts and is fastened by screw with each other;The other side of lock tongue cylinder (42) is configured with internal thread, and is threadedly connected with connecting head (422), the connecting head (422) is configured with pin hole for the sliding connection of trip pin (451) and column hole for the sliding connection of lock tongue column (43), the lock tongue column (43) is slidably connected in the column hole, the trip pin (451) is slidably connected in the pin hole, and when the lock tongue column (43) is in the locking state, the trip pin (451) is slidably connected in the connecting head (422) and embedded into the lock slot (432).

4. An underwater vessel mechanical unhooking device according to claim 1 or 2 or 3, characterized in that: The lock tongue frame (44) is set as U-shaped frame and is fastened and connected on both sides of connecting head (422) by screw;The lock tongue frame (44) is arranged vertically to lock tongue cylinder (42) so that trip pin (451) is perpendicular to lock tongue column (43).

5. An underwater object mechanical unhooking device according to claim 3, characterized in that: The outer ring wall of the first retaining ring (431) is arranged close to the inner cylinder wall of the lock tongue cylinder (42), and when one side of the first retaining ring (431) contacts the connecting head (422), one end of the lock tongue column (43) is just located in the lock hole (411).

6. An underwater object mechanical unhooking device according to claim 5, characterized in that: The lock hole (411) and the lock tongue column (43) are sealingly arranged.

7. An underwater object mechanical unhooking device according to claim 5, characterized in that: A gap is formed between the lock hole (411) and the lock bolt post (43).

8. An underwater object mechanical unhooking device according to claim 4, characterized in that: One end of the hand buckle (453) is provided with a hand ring (46), and the outer layer of the lock release rope (45) is fixedly arranged on the hand ring (46); the outer layer of the other end of the lock release rope (45) is adjustably arranged on the lock release post (44), the lock release pin (451) is accommodated in the inner side of the lock release post (44) and the first spring (47) is exposed.

9. An underwater object mechanical unhooking device according to claim 8, characterized in that: The hand ring (46) is provided in a square frame, and a rotatable handle (461) is arranged on the side opposite to the lock release rope (45).

10. An underwater vessel mechanical unhooking device according to any one of claims 1 to 9, characterized in that: All components are made of corrosion-resistant materials or are subjected to corrosion-resistant treatment.

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