Emergency recovery method for water bottom work equipment in pool test

Abstract

An emergency recovery method of water bottom operation equipment for pool test, the tail end of a guide cable of the water bottom operation equipment floats on the water surface of the test pool; the method comprises the following steps: 1, a floating structure moves near the tail end of the guide cable, a lifting cable is arranged on the floating structure, and a lifting load head is arranged at the tail end of the lifting cable; 2, the guide cable is connected with the lifting load head, and the lifting cable is in a slack state; 3, the lifting load head sinks under the driving action of gravity and the guiding action of the guide cable, and is connected with a lifting connection structure on the water bottom operation equipment; 4, a pulling force is applied to the lifting connection structure through the lifting cable, and the water bottom operation equipment is lifted to a water surface position; 5, after the floating structure moves to a recovery area of the test pool, the water bottom operation equipment is recovered to a pool bank by using a lifting equipment, so that the water bottom operation equipment is recovered in an undrained manner, the recovery efficiency is improved, and water resources are saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of underwater operation equipment test equipment, in particular to an emergency recovery method of underwater operation equipment for pool test. BACKGROUND

[0002] Before product finalization, underwater operation equipment usually carries out pool test, and the pool is usually composed of a test preparation workshop and an open water area of the pool, the preparation workshop is connected with the open water area of the pool, and the preparation workshop is equipped with a crown block.

[0003] In the pool test, the underwater operation equipment is put into the bottom of the pool through the crown block of the test preparation workshop, and the underwater operation equipment enters the open water area of the pool to carry out test through its own power. In the test, some unexpected situations may cause the underwater operation equipment to lose power, and it cannot return to the preparation workshop by its own power, so the underwater operation equipment cannot be recovered.

[0004] In the prior art, when the underwater operation equipment weighing several dozen tons loses power in the pool test, the pool is drained, and a hoisting device is opened near the underwater operation equipment to recover it. Although the equipment can be recovered, a lot of debugging time is lost and a lot of resources are wasted. SUMMARY

[0005] In view of the above-mentioned shortcomings in the prior art, the present application provides an emergency recovery method of underwater operation equipment for pool test, so as to realize emergency recovery of the underwater operation equipment without draining water, improve recovery efficiency, and save water resources.

[0006] The technical scheme adopted by the present application is as follows:

[0007] An emergency recovery method of underwater operation equipment for pool test, a hoisting connection structure and a guide cable are arranged on the underwater operation equipment, the head end of the guide cable is connected with the hoisting connection structure, the underwater operation equipment is located at the bottom of a test pool, and the tail end of the guide cable floats on the water surface of the test pool.

[0008] The method comprises the following steps:

[0009] Step one, a floating structure moves near the tail end of the guide cable on the water surface of the test pool, a hoisting cable is arranged on the floating structure, and a hoisting load head is arranged at the end of the hoisting cable.

[0010] Step two, the guide cable is connected with the hoisting load head, and the hoisting cable is in a slack state.

[0011] Step three, the hoisting load head sinks to the hoisting connection structure under the driving action of gravity and the guiding action of the guide cable, and is connected with the hoisting connection structure.

[0012] Step four, the water bottom operation equipment is lifted to the water surface position by exerting pulling force on the lifting connection structure through the lifting cable;

[0013] Step five, after the floating structure travels to the recovery area of the test pool, the water bottom operation equipment is recovered to the pool bank by using the lifting equipment.

[0014] As a further improvement of the above technical solution:

[0015] The lifting connection structure comprises: a socket on the body structure of the water bottom operation equipment, the upper end of the socket penetrating the upper surface of the water bottom operation equipment; a plurality of sliding holes penetrating the socket are arranged on the body structure of the socket periphery, and an elastic member is mounted at the bottom of the sliding hole; a force bearing block is slidingly mounted in the sliding hole, one end of the force bearing block is directed to the upper surface of the water bottom operation equipment, and the other end of the force bearing block is connected with the bottom of the sliding hole through the elastic member; the lower end of the lifting load head is an axial limiting block;

[0016] In step three, the process of connecting the lifting load head with the lifting connection structure is that the lifting load head is inserted into the socket, the axial limiting block impacts the end of the force bearing block in the socket, the elastic member is compressed, the force bearing block slides in the sliding hole, and when the axial limiting block passes over the end of the force bearing block, the end of the force bearing block resets and is located above the axial limiting block, limiting the axial limiting block.

[0017] The structure of the sliding hole comprises a guide hole section and an avoidance hole section which communicates the guide hole section with the socket, and a limiting step is formed at the connection of the guide hole section and the avoidance hole section;

[0018] The structure of the force bearing block comprises a sliding section and a force bearing section connected with the sliding section, the sliding section is connected with the guide hole section through the elastic member, the sliding section is slidingly matched with the guide hole section, the sliding section is limited by the limiting step, the elastic member is in a compressed state, and when the sliding section contacts with the limiting step, the force bearing section is located in the socket.

[0019] The guide cable is arranged in the socket, an end of the socket is provided with a mounting structure for connecting the leading end of the guide cable, and a guide hole penetrating the lifting load head is arranged in the middle of the lifting load head.

[0020] In step three, during the sinking process of the lifting load head, the guide cable is located in the guide hole, and the lifting load head slides along the guide cable.

[0021] The hoisting load-bearing head comprises a neck lock part, the axial limiting block is located at the lower end of the neck lock part, and a radial limiting block is arranged at the upper end of the neck lock part;

[0022] In step four, when the hoisting cable exerts a pulling force on the hoisting connecting structure, the axial limiting block is in contact with the plurality of force bearing sliding blocks, and the radial limiting block is in contact with the insertion hole.

[0023] The lower end of the axial limiting block is provided with a first taper surface, when the axial limiting block impacts the end of the force bearing sliding block, the first taper surface acts on the arc surface of the end of the force bearing sliding block, drives the force bearing sliding block to move, and converts the displacement of the axial limiting block in the axial direction of the insertion hole into the displacement of the force bearing sliding block in the axial direction of the sliding hole.

[0024] A driving taper surface is arranged on the radial limiting block located on one side of the neck lock part,

[0025] The insertion hole is a through hole, a baffle is detachably mounted at the end of the insertion hole, and the mounting structure is arranged on the baffle,

[0026] When the hoisting connecting structure is not subjected to external force, the distance between the end of the force bearing sliding block and the mounting structure is H1, and the distance between the driving taper surface and the first taper surface is H2, H2 is greater than or equal to H1.

[0027] Further comprising step six, after the baffle is detached, the hoisting load-bearing head is pulled, the driving taper surface acts on the end of the force bearing sliding block, the force bearing sliding block is driven to move, the displacement of the hoisting load-bearing head in the axial direction of the insertion hole is converted into the displacement of the force bearing sliding block in the axial direction of the sliding hole, until the radial limiting block passes the force bearing sliding block, and the hoisting load-bearing head is disconnected with the hoisting connecting structure.

[0028] The upper surface of the underwater operation equipment is provided with a guide taper surface, and the center of the guide taper surface is communicated with the insertion hole.

[0029] The structure of the floating structure comprises two floating body structures, the two floating body structures are connected through a steel structure, a winch is fixedly installed on the steel structure between the two floating body structures, and the winch drum is wound with the hoisting cable.

[0030] In step two, the winch drum is rotated to make the hoisting cable in a relaxed state, and in step four, the winch drum is reversely rotated to gradually wind the hoisting cable on the winch drum, so as to exert a pulling force on the hoisting connecting structure.

[0031] A plurality of floating balls are fixedly arranged on the upper portion of the guide cable, the plurality of floating balls are arranged along the length direction of the guide cable, and when the underwater operation equipment is located at the bottom of the test pool, the floating balls are located above the water surface.

[0032] The beneficial effects of the present application are as follows:

[0033] The application has the advantages of compact structure, reasonable design, convenient operation, and the like.

[0034] Meanwhile, the application has the following advantages:

[0035] (1) The lifting load head is inserted into the socket of the lifting connection structure, the load bearing block is slidably installed on the side of the socket and is inclined towards the socket entrance, the movement and resetting of the load bearing block are realized through the impact of the lifting load head and the elastic force of the elastic member, the lifting load head that has passed the load bearing block is limited by the plurality of load bearing blocks in the shape of a mule's foot, the connection mode of the lifting connection structure is simple and easy to operate, in addition, the sliding hole for slidably installing the load bearing block indirectly plays the role of load bearing limiting through the load bearing block, and the rigidity of the lifting connection structure is ensured.

[0036] (2) The lifting load head is provided in a three-section structure, the upper and lower ends of the lifting load head are limited, and the connection structure stability of the lifting load head and the lifting connection structure during lifting is ensured.

[0037] (3) The axial limiting block not only plays the role of stabilizing the connection structure during lifting, but also, under the cooperation of the detachable baffle, opens the bottom of the socket, drives the load bearing block to open, and releases the connection relationship between the lifting load head and the lifting connection structure, in the connection structure of the overall lifting cable and the water bottom operation equipment, only two load bearing blocks are slidably installed, and the other structures are rigidly fixed, the bearing capacity and connection effect of the connection structure are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 FIG. 1 is a structural schematic diagram of the floating structure of the application.

[0039] Figure 2 FIG. 3 is a structural schematic diagram of the water bottom operation equipment of the application.

[0040] Figure 3 FIG. 5 is a process state diagram (I) of the emergency recovery method of the application.

[0041] Figure 4 FIG. 6 is a process state diagram (II) of the emergency recovery method of the application.

[0042] Figure 5 Connection diagram of the lifting load bearing head and the lifting connection structure of the present application.

[0043] Figure 6 Structure diagram of the lifting connection structure of the present application.

[0044] Figure 7 Structure diagram of the lifting load bearing head of the present application.

[0045] Figure 8 Connection process diagram of the lifting load bearing head and the lifting connection structure of the present application.

[0046] Figure 9 Disconnection process diagram of the lifting load bearing head and the lifting connection structure of the present application.

[0047] Wherein:

[0048] 1, floating structure; 11, floating body structure; 12, steel structure; 13, cable exit; 14, winch;

[0049] 2, lifting cable;

[0050] 3, guide cable; 31, hanging structure; 32, baffle; 33, floating ball;

[0051] 4, auxiliary block; 41, guide cone;

[0052] 5, lifting connection structure; 51, socket; 52, force bearing sliding block; 521, sliding section; 522, force bearing section; 523, local cone surface; 524, arc surface; 525, plane; 53, elastic member; 54, sliding hole; 541, avoiding hole section; 542, limiting step; 543, guide hole section;

[0053] 6, underwater operation equipment; 61, body structure;

[0054] 7, lifting load bearing head; 71, axial limiting block; 711, first cone surface; 712, second cone surface; 72, neck lock part; 73, radial limiting block; 731, driving cone surface; 74, guide hole. DETAILED DESCRIPTION

[0055] The specific embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0056] Example one:

[0057] As Figures 1-8As shown, the water bottom operation equipment emergency recovery method of the pool test of the embodiment is provided with a lifting connection structure 5 and a guide cable 3 on the water bottom operation equipment 6, the head end of the guide cable 3 is connected with the lifting connection structure 5, the water bottom operation equipment 6 is located at the bottom of the test pool, and the tail end of the guide cable 3 floats on the water surface of the test pool;

[0058] The method comprises:

[0059] Step one, the floating structure 1 travels near the tail end of the guide cable 3 on the water surface of the test pool, the floating structure 1 is provided with a lifting cable 2, and the end of the lifting cable 2 is provided with a lifting load head 7;

[0060] Step two, the guide cable 3 is connected with the lifting load head 7, and the lifting cable 2 is in a slack state;

[0061] Step three, the lifting load head 7 sinks to the lifting connection structure 5 under the driving action of gravity and the guiding action of the guide cable 3, and is connected with the lifting connection structure 5;

[0062] Step four, the lifting connection structure 5 is pulled by the lifting cable 2 to lift the water bottom operation equipment 6 to the water surface position;

[0063] Step five, after the floating structure 1 travels to the recovery area of the test pool, the water bottom operation equipment 6 is recovered to the pool bank by using the lifting equipment.

[0064] The water bottom operation equipment 6 refers to equipment such as a seabed mining device that can travel on the water bottom by its own power and needs to be tested to verify its performance.

[0065] By providing the guide cable 3 floating on the water surface at the tail end of the water bottom operation equipment 6 as a position marker of the water bottom operation equipment 6, the connection of the guide cable 3 and the lifting load head 7 on the water is facilitated, the lifting load head 7 is connected with the lifting connection structure 5 by gravity driving, the floating structure 1 is used as a lifting operation point on the water surface in the test area, the water bottom operation equipment 6 is lifted to the water surface position, then the floating structure 1 carries the water bottom operation equipment 6 to travel to the recovery area, and the water bottom operation equipment 6 is recovered above the water surface without the need to drain the water in the test pool during the test process, the recovery efficiency is improved, and the water resource is saved.

[0066] Embodiment two:

[0067] On the basis of embodiment one, the water bottom operation equipment emergency recovery method of the pool test of the embodiment is:

[0068] As Figures 5-7As shown, the lifting connection structure 5 structure includes: the insertion hole 51 on the body structure 61 of the underwater operation equipment 6, the upper end of the insertion hole 51 penetrates the upper surface of the underwater operation equipment 6; A plurality of sliding holes 54 are provided on the body structure 61 outside the insertion hole 51, the bottom of the sliding hole 54 is provided with an elastic element 53; The load bearing block 52 is slidably installed in the sliding hole 54, one end of the load bearing block 52 is directed to the upper surface of the underwater operation equipment 6, the other end of the load bearing block 52 is connected with the bottom of the sliding hole 54 through the elastic element 53; The lower end of the lifting load head 7 is an axial limiting block 71.

[0069] In step three, the process of connecting the lifting load head 7 with the lifting connection structure 5 is that the lifting load head 7 is inserted into the insertion hole 51, the axial limiting block 71 impacts the end of the load bearing block 52 in the insertion hole 51, the elastic element 53 is compressed, the load bearing block 52 slides in the sliding hole 54, and when the axial limiting block 71 passes the end of the load bearing block 52, the end of the load bearing block 52 resets and is located above the axial limiting block 71, limiting the axial limiting block 71.

[0070] Specifically, the elastic element 53 is a spring, the number of load bearing blocks 52 is multiple, at least two, when the number of load bearing blocks 52 is two, as shown in the figure, Figure 5 、 Figure 6 The number of sliding holes 54 is two, and is symmetrical about the axis of the insertion hole 51. When the number of load bearing blocks 52 is greater than or equal to three, they are evenly distributed in a ring array with the axis of the insertion hole 51 as the center.

[0071] One end of the load bearing block 52 directed to one end of the upper surface of the underwater operation equipment 6 is the end of the load bearing block 52 impacted by the axial limiting block 71, the axis of the sliding hole 54 intersects with the axis of the insertion hole 51 and is in an inclined state with the axis of the insertion hole 51, and the sliding hole 54 penetrates the side wall of the insertion hole 51.

[0072] The sliding hole 54 acts as a sliding track for the load bearing block 52, and when the lifting load head 7 is connected with the lifting connection structure 5, the sliding hole 54, the load bearing block 52 and the lifting load head 7 interact to achieve self-locking.

[0073] The lifting load head 7 is inserted into the insertion hole 51 of the lifting connection structure 5, the load bearing block 52 is slidably installed on the side of the insertion hole 51 and is inclined towards the entrance of the insertion hole 51, and the movement and reset of the load bearing block 52 are realized through the impact of the lifting load head 7 and the elastic force of the elastic element 53, the plurality of load bearing blocks 52 are in a spread shape to limit the lifting load head 7 that has passed the load bearing block 52, the connection mode of the lifting connection structure 5 is simple and easy to operate, in addition, the sliding hole 54 slidably installed with the load bearing block 52 also indirectly plays a role in force limiting through the load bearing block 52, ensuring the rigidity of the lifting connection structure 5.

[0074] As shown in Figure 7 , the structure of the sliding hole 54 includes a guide hole section 543 and an escape hole section 541 that communicates the guide hole section 543 with the insertion hole 51, and a limiting step 542 is formed at the connection between the guide hole section 543 and the escape hole section 541;

[0075] The structure of the force-bearing sliding block 52 includes a sliding section 521 and a force-bearing section 522 connected with the sliding section 521, the sliding section 521 is connected with the guide hole section 543 through the elastic member 53, the sliding section 521 is in sliding fit with the guide hole section 543, the sliding section 521 is limited by the limiting step 542 so that the elastic member 53 is in a compressed state, and when the sliding section 521 is in contact with the limiting step 542, the force-bearing section 522 is located in the insertion hole 51.

[0076] The limiting step 542 limits the extreme displacement of the force-bearing sliding block 52, which ensures the stability of the relative position of the force-bearing sliding block 52 under the condition that the lifting connection structure 5 is not subjected to external force while ensuring the bearing capacity.

[0077] As shown in Figure 5 , Figure 8 , the guide cable 3 is arranged in the insertion hole 51, and the end of the insertion hole 51 is provided with a mounting structure 31 for connecting the leading end of the guide cable 3, and the middle part of the lifting load head 7 is provided with a guide hole 74 that penetrates the lifting load head 7;

[0078] In step three, during the sinking process of the lifting load head 7, the guide cable 3 is located in the guide hole 74, and the lifting load head 7 slides along the guide cable 3. At the same time, in step two, the guide cable 3 is arranged in the guide hole 74, and the guide cable 3 is in sliding connection with the lifting load head 7; the guide hole 74 is circular and has a diameter greater than that of the guide cable 3, and the mounting structure 31 is also a downward limiting structure of the lifting load head 7.

[0079] As shown in Figure 7 , Figure 8 , the lifting load head 7 includes a neck lock portion 72, an axial limiting block 71 is located at the lower end of the neck lock portion 72, and a radial limiting block 73 is arranged at the upper end of the neck lock portion 72;

[0080] In step four, when the lifting cable 2 exerts a pulling force on the lifting connection structure 5, the axial limiting block 71 is in contact with the plurality of force-bearing sliding blocks 52, and at the same time, the radial limiting block 73 is in contact with the insertion hole 51, thereby limiting the position of the lifting load head 7 in the radial direction in the insertion hole 51.

[0081] The lifting load head 7 is arranged in a three-section structure, which realizes the limiting of the upper and lower ends of the lifting load head 7 and ensures the stability of the connection structure of the lifting load head 7 and the lifting connection structure 5 during lifting.

[0082] As shown in Figure 7 , Figure 8As shown, the lower end of the axial limiting block 71 is provided with a first conical surface 711. When the axial limiting block 71 impacts the end of the load-bearing slider 52, the first conical surface 711 interacts with the arc surface 524 at the end of the load-bearing slider 52, driving the load-bearing slider 52 to move, thus converting the displacement of the axial limiting block 71 along the axis of the insertion hole 51 into the displacement of the load-bearing slider 52 along the axis of the sliding hole 54.

[0083] A second conical surface 712 is provided on the axial limiting block 71 on one side of the neck lock part 72. After the second conical surface 712 contacts the end of the load-bearing slider 52, the load-bearing slider 52 limits the lifting load-bearing head 7.

[0084] Furthermore, the contact surface between the load-bearing slider 52 and the second conical surface 712 is a partial conical surface 523 that is fan-shaped as a whole. When the load-bearing slider 52 contacts the second conical surface 712 of the axial limiting block 71, the partial conical surface 523 fits into the second conical surface 712 to ensure good load-bearing effect.

[0085] Specifically, the local conical surface 523 is located on the load-bearing section 522, and the upper end of the load-bearing section 522 also includes a plane 525 located outside the arc surface 524.

[0086] When the lifting cable 2 applies tension to the lifting connection structure 5, when the axial limiting block 71 contacts the multiple load-bearing sliders 52, the contact position between the end of the load-bearing slider 52 and the neck lock part 72 is a local annular surface, which further ensures that the lifting load-bearing head 7 does not shake during the lifting process. The local annular surface and the plane 525 are located on both sides of the arc surface 524, respectively.

[0087] like Figures 7-9 As shown, a driving cone surface 731 is provided on the radial limiting block 73 located on one side of the neck lock portion 72.

[0088] The socket 51 is a through hole, and a baffle 32 can be detachably installed at the end of the socket 51. The mounting structure 31 is set on the baffle 32.

[0089] When the lifting connection structure 5 is not subjected to external force, the distance between the end of the load-bearing slider 52 and the hanging structure 31 is H1, and the distance between the driving cone surface 731 and the first cone surface 711 is H2, where H2 is greater than or equal to H1.

[0090] The process also includes step six: after removing the baffle 32, pull the lifting load-bearing head 7 so that the driving cone surface 731 acts on the end of the load-bearing slider 52, driving the load-bearing slider 52 to move, converting the displacement of the lifting load-bearing head 7 along the axis of the insertion hole 51 into the displacement of the load-bearing slider 52 along the axis of the sliding hole 54, until the radial limit block 73 passes over the load-bearing slider 52, and the lifting load-bearing head 7 is disconnected from the lifting connection structure 5.

[0091] Specifically, the distance between the end arc surface 524 of the force bearing block 52 and the mounting structure 31 is H1; the hoisting load head 7 can be pulled by the guide cable 3; after the hoisting load head 7 is detached from the hoisting cable 2 and the guide cable 3 and the mounting structure 31 are detached, the hoisting load head 7 can be removed, and then the guide cable 3 and the baffle 32 are reinstalled at the position of the insertion hole 51.

[0092] The axial limiting block 71 not only plays a role of stabilizing the connection structure during hoisting, but also, under the cooperation of the detachable baffle 32, opens the bottom of the insertion hole 51, drives the opening of the force bearing block 52, and releases the connection relationship between the hoisting load head 7 and the hoisting connection structure 5, so that only two sliding force bearing blocks 52 are present in the connection structure between the overall hoisting cable 2 and the underwater operation equipment 6, and other structures are rigid fixed structures, which ensures the bearing capacity and connection effect of the connection structure.

[0093] As shown in Figure 5 , Figure 6 , the upper surface of the underwater operation equipment 6 is provided with a guide conical surface 41, and the center of the guide conical surface 41 is communicated with the insertion hole 51.

[0094] The guide conical surface 41 plays an auxiliary role of guiding the hoisting load head 7 into the insertion hole 51. Specifically, the upper surface of the underwater operation equipment 6 is provided with an auxiliary block 4, the auxiliary block 4 is provided with the guide conical surface 41, and the insertion hole 51 penetrates the auxiliary block 4.

[0095] As shown in Figure 1 , Figure 3 , Figure 4 , the structure of the floating structure 1 includes two floating body structures 11, the two floating body structures 11 are connected through a steel structure 12, the steel structure 12 between the two floating body structures 11 is fixedly installed with a winch 14, and the winch 14 is wound with the hoisting cable 2.

[0096] In step two, the winch is rotated to make the hoisting cable 2 in a relaxed state, and in step four, the winch is reversely rotated to gradually wind the hoisting cable 2 on the winch, so as to apply a pulling force to the hoisting connection structure 5.

[0097] In order to keep the state of the floating structure 1 stable during lifting of the underwater operation equipment 6, the floating structure 1 is provided with a cable outlet 13, and the cable outlet 13 is located at the horizontal center of gravity of the floating structure 1.

[0098] Further, the hoisting connection structure 5 is arranged at the horizontal center of gravity of the underwater operation equipment 6, and the distance L between the two floating body structures 11 is greater than the width of the underwater operation equipment 6.

[0099] As shown in Figure 2As shown, a plurality of floating balls 33 are fixed on the upper part of the guide cable 3, and the floating balls 33 are arranged along the length direction of the guide cable 3. When the underwater operation equipment 6 is located at the bottom of the test pool, the floating balls 33 are above the water surface.

[0100] The plurality of floating balls 33 are arranged on the guide cable 3, so that the guide cable 3 can follow the underwater operation equipment 6 and float on the water surface, the influence of the guide cable 3 on the movement of the underwater operation equipment 6 is minimized, and the position of the lifting connection structure 5 on the underwater operation equipment 6 is indicated.

[0101] During the test process of the underwater operation equipment 6 in the test pool, if the underwater operation equipment 6 loses power in the test area, the emergency recovery process of the underwater operation equipment 6 is as follows:

[0102] Step one, the floating structure 1 is driven to the vicinity of the underwater operation equipment 6.

[0103] Step two, the part of the guide cable 3 floating on the water surface is pulled out of the water, the floating balls 33 are removed in sequence, the guide cable 3 is put into the guide hole 74 of the lifting load head 7, the guide cable 3 is pulled into a straight line state, and the winch is rotated to make the lifting cable 2 in a relaxed state.

[0104] Step three, the lifting load head 7 is lowered, the lifting load head 7 pulls the lifting cable 2 along the guide cable 3 to the lifting connection structure 5 under the action of gravity; then the lifting load head 7 is inserted into the insertion hole 51, the axial limiting block 71 impacts the bearing sliding block 52, the elastic member 53 is further compressed, the bearing sliding blocks 52 are away from each other, the axial limiting block 71 continues to slide to below the bearing sliding block 52, the bearing sliding block 52 is reset under the elastic force of the elastic member 53, the axial limiting of the axial limiting block 71 is limited, the radial limiting block 73 at the upper end contacts the insertion hole 51, the position of the lifting load head 7 in the radial direction of the insertion hole 51 is limited, and the axial limiting block 71 stops after touching the hanging structure 31.

[0105] Step four, the winch 14 is driven to pull up the lifting cable 2, after the axial limiting block 71 closely contacts the bearing sliding block 52, the lifting cable 2 exerts a pulling force on the bearing sliding block 52, the sliding hole 54, the bearing sliding block 52 and the axial limiting block 71 are closely contacted in sequence to form a self-locking structure, and the lifting cable 2 is continuously pulled up to lift the underwater operation equipment 6 to the water surface position.

[0106] Step five, the floating structure 1 is driven to the recovery area of the test pool, the recovery area of the test pool is located in the test preparation room, the floating structure 1 together with the underwater operation equipment 6 is lifted to the pool bank of the test preparation room by the crown block in the test preparation room, and the emergency recovery of the underwater operation equipment 6 is completed.

[0107] Step six, after the water bottom operation equipment 6 is recovered to the pool bank, the baffle 32 is disassembled, the lifting load head 7 is pulled, the driving cone surface 731 is in action with the end of the bearing sliding block 52, the bearing sliding block 52 is driven to move, the displacement of the lifting load head 7 along the axis direction of the insertion hole 51 is converted into the displacement of the bearing sliding block 52 along the axis direction of the sliding hole 54, until the radial limiting block 73 passes the bearing sliding block 52, the lifting load head 7 is disconnected with the lifting connection structure 5.

[0108] The above description is an explanation of the application, not a limitation of the application, the scope defined by the application is referred to the claims, within the protection scope of the application, any form of modification can be made.

Claims

1. An emergency recovery method for underwater work equipment used in pool tests, characterized in that: The underwater operation equipment (6) is equipped with a lifting connection structure (5) and a guide cable (3). The head end of the guide cable (3) is connected to the lifting connection structure (5). The underwater operation equipment (6) is located at the bottom of the test pool, and the tail end of the guide cable (3) floats on the surface of the test pool. The method includes: Step 1: The floating structure (1) travels on the surface of the test pool near the tail end of the guide cable (3). The floating structure (1) is equipped with a lifting cable (2), and the end of the lifting cable (2) is equipped with a lifting load-bearing head (7). Step 2: Connect the guide cable (3) to the lifting support head (7), with the lifting cable (2) in a slack state; Step 3: The lifting load-bearing head (7) sinks to the lifting connection structure (5) under the driving force of gravity and the guiding force of the guide cable (3) and connects with the lifting connection structure (5); Step 4: Apply tension to the lifting connection structure (5) using the lifting cable (2) to lift the underwater operation equipment (6) to the water surface position; Step 5: After the floating structure (1) moves to the recovery area of ​​the test pool, the underwater operation equipment (6) is recovered to the pool bank using lifting equipment. The lifting connection structure (5) includes: an insertion hole (51) on the main body structure (61) of the underwater operation equipment (6), the upper end of the insertion hole (51) penetrating the upper surface of the underwater operation equipment (6); a plurality of sliding holes (54) penetrating the insertion hole (51) are provided on the main body structure (61) around the insertion hole (51), and an elastic element (53) is installed at the bottom of the sliding hole (54); a load-bearing slider (52) is slidably installed in the sliding hole (54), one end of the load-bearing slider (52) facing the upper surface of the underwater operation equipment (6), and the other end of the load-bearing slider (52) is connected to the bottom of the sliding hole (54) through the elastic element (53); the lower end of the lifting load-bearing head (7) is an axial limiting block (71). In step three, the connection process between the lifting load-bearing head (7) and the lifting connection structure (5) is as follows: the lifting load-bearing head (7) is inserted into the insertion hole (51), the axial limiting block (71) impacts the end of the load-bearing slider (52) located in the insertion hole (51), causing the elastic element (53) to be compressed, and the load-bearing slider (52) slides in the sliding hole (54). When the axial limiting block (71) passes the end of the load-bearing slider (52), the end of the load-bearing slider (52) is reset and located above the axial limiting block (71), thus limiting the axial limiting block (71).

2. The emergency recovery method for underwater work equipment used in pool testing as described in claim 1, characterized in that: The structure of the sliding hole (54) includes a guide hole section (543) and a clearance hole section (541) that connects the guide hole section (543) and the insertion hole (51). A limiting step (542) is formed at the connection between the guide hole section (543) and the clearance hole section (541). The structure of the load-bearing slider (52) includes a sliding section (521) and a load-bearing section (522) connected to the sliding section (521). The sliding section (521) is connected to the guide hole section (543) through the elastic element (53). The sliding section (521) and the guide hole section (543) are slidably engaged. The sliding section (521) is limited by the limiting step (542), so that the elastic element (53) is in a compressed state. When the sliding section (521) contacts the limiting step (542), the load-bearing section (522) is located inside the insertion hole (51).

3. The emergency recovery method for underwater work equipment used in pool testing as described in claim 1, characterized in that: The guide cable (3) is inserted into the socket (51). The end of the socket (51) is provided with a mounting structure (31). The mounting structure (31) is used to connect the head of the guide cable (3). The middle part of the lifting bearing head (7) is provided with a guide hole (74) that passes through the lifting bearing head (7). In step three, during the sinking process of the lifting load-bearing head (7), the guide cable (3) is located in the guide hole (74), and the lifting load-bearing head (7) slides along the guide cable (3).

4. The emergency recovery method for underwater work equipment used in pool testing as described in claim 3, characterized in that: The lifting load-bearing head (7) includes a neck lock (72), the axial limiting block (71) is located at the lower end of the neck lock (72), and a radial limiting block (73) is provided at the upper end of the neck lock (72). In step four, when the lifting cable (2) applies tension to the lifting connection structure (5), the axial limiting block (71) contacts multiple load-bearing sliders (52), and at the same time the radial limiting block (73) contacts the insertion hole (51).

5. The emergency recovery method for underwater work equipment used in pool testing as described in claim 4, characterized in that: The lower end of the axial limiting block (71) is provided with a first conical surface (711). When the axial limiting block (71) impacts the end of the load-bearing slider (52), the first conical surface (711) interacts with the arc surface (524) at the end of the load-bearing slider (52), driving the load-bearing slider (52) to move, and converting the displacement of the axial limiting block (71) along the axis of the insertion hole (51) into the displacement of the load-bearing slider (52) along the axis of the sliding hole (54).

6. The emergency recovery method for underwater work equipment used in pool testing as described in claim 5, characterized in that: A driving cone surface (731) is provided on the radial limiting block (73) located on one side of the neck lock (72). The insertion hole (51) is a through hole, and a baffle (32) is detachably installed at the end of the insertion hole (51). The mounting structure (31) is disposed on the baffle (32). When the lifting connection structure (5) is not subjected to external force, the distance between the end of the load-bearing slider (52) and the hanging structure (31) is H1, and the distance between the driving cone surface (731) and the first cone surface (711) is H2, where H2 is greater than or equal to H1. The process also includes step six: after disassembling the baffle (32), pull the lifting load-bearing head (7) so that the driving cone surface (731) interacts with the end of the load-bearing slider (52) to drive the load-bearing slider (52) to move, and convert the displacement of the lifting load-bearing head (7) along the axis of the insertion hole (51) into the displacement of the load-bearing slider (52) along the axis of the sliding hole (54) until the radial limit block (73) passes over the load-bearing slider (52) and disconnects the lifting load-bearing head (7) from the lifting connection structure (5).

7. The emergency recovery method for underwater work equipment used in pool testing as described in claim 1, characterized in that: The upper surface of the underwater working equipment (6) is provided with a guide cone (41), and the center of the guide cone (41) is connected to the insertion hole (51).

8. The emergency recovery method for underwater work equipment used in pool testing as described in claim 1, characterized in that: The structure of the floating structure (1) includes two floating structures (11), which are connected by a steel structure (12). A winch (14) is fixedly installed on the steel structure (12) between the two floating structures (11), and the hoisting cable (2) is wound on the winch of the winch (14). In step two, the winch is rotated to make the lifting cable (2) slack. In step four, the winch is rotated in the opposite direction to make the lifting cable (2) gradually wind around the winch and apply tension to the lifting connection structure (5).

9. The emergency recovery method for underwater operation equipment used in pool testing as described in claim 1, characterized in that: Multiple floats (33) are fixed on the upper part of the guide cable (3). The multiple floats (33) are arranged along the length of the guide cable (3). When the underwater operation equipment (6) is located at the bottom of the test pool, the floats (33) are above the water surface.

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