A tension compensation device and method for steel wire ropes used in marine operations

Abstract

This application discloses a wire rope tension compensation device for marine operations, belonging to the field of marine equipment technology. During operations such as dredging, trawls, or equipment deployment and retrieval, increased tension in the wire rope causes the cylinder rod to retract towards the hydraulic cylinder, releasing the wire rope at the load end, and storing energy in the accumulator. Conversely, decreased tension causes the cylinder rod to extend towards the hydraulic cylinder, retracting the wire rope at the load end. Thus, by moving the movable pulley driven by the cylinder rod, the tension changes in the wire rope are compensated, achieving passive wave compensation. Simultaneously, the drive unit drives the winch to actively participate in wave compensation based on the compensation status of the hydraulic cylinder and movable pulley. The winch can work in conjunction with the hydraulic cylinder to perform wave compensation even under significant tension changes, preventing rope breakage, damage or loss of equipment due to excessive tension, or insufficient tension leading to loosening, tangling, or even wire rope knots, which seriously affect operational safety.

Description

Technical Field

[0001] This application relates to the field of marine equipment technology, and in particular to a tension compensation device and method for steel wire ropes used in marine operations. Background Technology

[0002] During marine operations, such as deep-sea towed exploration, ROV deployment and retrieval, submarine cable laying, and marine cargo transport, the vessels are susceptible to rolling, pitching, heaving, and swaying motions caused by waves and ocean currents. This leads to sudden tension changes in the tow cables and umbilical cables connecting the vessel to the operational load. Excessive tension can cause cables to break, damage or loss of equipment; insufficient tension can cause cables to become loose and tangled, or even lead to knotted wire ropes, seriously affecting operational safety. Therefore, a tension compensation system is a core piece of equipment for ensuring the safe and stable operation of marine operations. Summary of the Invention

[0003] This application provides a tension compensation device and method for steel wire ropes used in marine operations. It addresses the existing need for an effective compensation device to compensate for changes in steel wire rope tension. The technical solution is as follows: On the one hand, a tension compensation device for marine operation wire rope is provided, which includes: a fixed pulley, a movable pulley, a hydraulic cylinder, an accumulator, a position detector, a winch, a drive component, and a controller; The fixed pulley and the movable pulley are arranged opposite each other in a preset direction. The fixed pulley and the movable pulley each have multiple winding positions. Steel wire ropes are wound around the multiple winding positions of the fixed pulley and the multiple winding positions of the movable pulley. The two ends of the steel wire ropes are respectively connected to the load and the winch. The bottom of the cylinder body of the hydraulic cylinder is connected to the end of the fixed pulley, and the extended end of the cylinder rod is synchronously connected to the end of the movable pulley. The accumulator is connected to the hydraulic cylinder. The position detector is used to detect the movement position or movement distance of the cylinder rod extension end. The drive component is connected to the winch drive. Both the position detector and the drive component are electrically connected to the controller. The controller is used to control the rotation state of the winch through the drive component according to the movement position or movement distance of the cylinder rod extension end.

[0004] Optionally, the position detector includes: a first position sensor and a second position sensor, the first position sensor and the second position sensor being arranged opposite to each other along the moving direction of the cylinder rod, with the first position sensor closer to the movable pulley and the second position sensor closer to the fixed pulley; Specifically, the cylinder rod extends to move the movable pulley between the first and second position sensors, and the winch is in a braking state. When the cylinder rod moves the movable pulley away from the fixed pulley to the first position sensor, the controller controls the drive component to rotate the winch in the rope-reeling direction based on the position signal detected by the first position sensor. When the cylinder rod moves the movable pulley closer to the fixed pulley to the second position sensor, the controller controls the drive component to rotate the winch in the rope-releasing direction based on the position signal detected by the second position sensor. Alternatively, the position detector may include a pull-wire sensor, the device end of which is mounted on the cylinder body of the hydraulic cylinder, and the pull-wire end of which is connected to the extended end of the cylinder rod, for real-time detection of the movement distance of the movable pulley.

[0005] Optionally, if the number of strands of the wire rope wound on the movable pulley is M, and the moving distance of the movable pulley away from or near the fixed pulley is S, then the wire rope is retracted or released for a length of 2MS.

[0006] Optionally, the device further includes: a frame, an anti-loosening baffle, a return spring, and a first position detector. The anti-loosening baffle is located on the side of the movable pulley away from the fixed pulley and is slidably connected to the frame. The two ends of the return spring are respectively in contact with the side of the anti-loosening baffle away from the movable pulley and the frame. The first position detector is mounted on the frame and connected to the controller for detecting changes in the position of the anti-loosening baffle. When the tension at the load end of the wire rope is zero, the cylinder rod drives the movable pulley to move to abut against the anti-loosening baffle and clamp the wire rope. At the same time, the controller controls the winch brake according to the position change signal of the anti-loosening baffle detected by the first position detector.

[0007] Optionally, the movable pulley has multiple rope-winding grooves provided at the winding position, and the anti-loosening baffle has an arc-shaped surface on the side facing the movable pulley that matches the circumferential side surface of the movable pulley, and the anti-loosening baffle has a rope-pressing part fixed on the arc-shaped surface that corresponds one-to-one with the multiple rope-winding grooves.

[0008] Optionally, the device includes: a first limiter located on the side of the movable pulley away from the fixed pulley, and a second limiter located on the side of the fixed pulley away from the movable pulley, wherein both the first limiter and the second limiter are mounted on the frame; wherein the first limiter has a first limiting space directly opposite the winding end of the wire rope on the fixed pulley; and the second limiter has a second limiting space directly opposite the winding end of the wire rope on the movable pulley.

[0009] Optionally, both the first limiter and the second limiter include: an outer frame, two first guide rollers rotatably connected to the outer frame and arranged opposite each other along a first direction, and two second guide rollers rotatably connected to the outer frame and arranged opposite each other along a second direction. The two first guide rollers and the two second guide rollers are stacked along a third direction to form the first limiting space or the second limiting space. The first direction, the second direction and the third direction are perpendicular to each other, and the third direction is parallel to the preset direction.

[0010] Optionally, there are two hydraulic cylinders, with the bottom of the cylinder body of the two hydraulic cylinders connected to the two ends of the fixed pulley on both sides, and the cylinder rod extension ends of the two hydraulic cylinders connected to the two ends of the movable pulley on both sides.

[0011] Optionally, the driving component includes: a rotation drive, a brake, and a brake drive. The rotation drive is connected to the winch in a transmission manner. The brake is engaged with the winch and is connected in a transmission manner to the brake drive. The rotation drive drives the winch to rotate. The brake drive drives the winch to brake or release the winch through the brake.

[0012] Optionally, the braking component includes an annular brake band wrapped around the end of the winch. The braking drive component achieves braking by controlling the annular brake band to grip the winch, or by controlling the annular brake band to release the winch.

[0013] On the other hand, this application embodiment also provides a method for compensating the tension of a marine operation wire rope, the method being applied to any of the marine operation wire rope tension compensation devices described above, the method comprising: obtaining the moving position of the lever extension end driving the movable pulley; When the extended end of the cylinder rod drives the movable pulley to move between the first position sensor and the second position sensor, the winch is controlled to be in a braking state. When the cylinder rod drives the movable pulley to move to the first position sensor, the winch is controlled to rotate in the rope winding direction. When the cylinder rod drives the movable pulley to the second position sensor, it controls the winch to rotate in the direction of rope release.

[0014] The beneficial effects of the technical solutions provided in this application include at least the following: During operations such as ditching with a plow, net trawl, or equipment deployment and retrieval, the increased tension in the wire rope causes the cylinder rod to retract, releasing the wire rope at the load end and storing energy in the accumulator. Conversely, the decreased tension causes the cylinder rod to extend, retracting the wire rope at the load end. This passive wave compensation is achieved by moving the pulley driven by the cylinder rod to compensate for changes in wire rope tension. Simultaneously, the controller controls the drive unit to actively participate in wave compensation based on the compensation status of the hydraulic cylinder and pulley. The winch can work in conjunction with the hydraulic cylinder to perform wave compensation even under significant tension changes, preventing cable breakage, equipment damage or loss due to excessive wire rope tension, or insufficient tension leading to loosening, tangling, or even knotting, which seriously compromises operational safety. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a wire rope tension compensation device provided in an embodiment of this application; Figure 2 This is a schematic diagram of another wire rope tension compensation device provided in the embodiments of this application; Figure 3 This is a partial front view of a wire rope tension compensation device provided in an embodiment of this application; Figure 4 yes Figure 3 The diagram shown is an isometric view of the wire rope tension compensation device. Figure 5 This is a partial structural schematic diagram of another wire rope tension compensation device provided in the embodiments of this application; Figure 6 This is a structural schematic diagram of another wire rope tension compensation device provided in the embodiments of this application.

[0017] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0020] Please refer to Figures 1 to 6 , Figure 1 This is a schematic diagram of the structure of a wire rope tension compensation device provided in an embodiment of this application. Figure 2 This is a schematic diagram of another wire rope tension compensation device provided in an embodiment of this application. Figure 3 This is a partial front view of a wire rope tension compensation device provided in an embodiment of this application. Figure 4 yes Figure 3 The diagram shown is an isometric view of the wire rope tension compensation device. Figure 5 This is a partial structural schematic diagram of another wire rope tension compensation device provided in an embodiment of this application. Figure 6 This is a schematic diagram of another wire rope tension compensation device provided in the embodiments of this application. The wire rope tension compensation device for marine operations may include: a fixed pulley 100, a movable pulley 200, a hydraulic cylinder 300, an accumulator 400, a position detector 500, a winch 600, a drive component 700, and a controller.

[0021] In the marine operation wire rope tension compensation device, the fixed pulley 100 and the movable pulley 200 can be arranged opposite each other in a preset direction. The wire rope S of the winch 600 is wound into the movable pulley 200 and out of the fixed pulley 100. Wire rope S is wound at multiple winding positions on both the fixed pulley 100 and the movable pulley 200. The bottom of the cylinder body 302 in the hydraulic cylinder 300 is connected to the end of the fixed pulley 100, and the protruding end of the cylinder rod 301 in the hydraulic cylinder 300 is synchronously connected to the end of the movable pulley 200. The accumulator 400 is connected to the hydraulic cylinder 300.

[0022] The position detector 500 is used to detect the movement position or distance of the extended end of the cylinder rod 301, that is, the movement position or distance of the movable pulley 200 connected to the extended end of the cylinder rod 301. The drive component 700 is connected to the winch 600 for transmission. Both the position detector 500 and the drive component 700 are electrically connected to the controller. The controller is used to control the rotation state of the winch 600 through the drive component 700 according to the movement position or distance of the extended end. It should be noted that before wave compensation, the extended end of the cylinder rod 301 is located at the half-stroke position of the hydraulic cylinder 300, that is, the equilibrium position of the movable pulley 200, the wire rope S, and the hydraulic cylinder 300.

[0023] In this embodiment, during operations such as plowing and ditching, net tracing, or equipment deployment and retrieval, the increased tension in the wire rope causes the protruding end of the cylinder rod 301 in the hydraulic cylinder 300 to retract towards the hydraulic cylinder 300, releasing the wire rope at the load end, and storing energy in the accumulator 400. Conversely, the decreased tension in the wire rope causes the protruding end of the cylinder rod in the hydraulic cylinder 300 to extend towards the hydraulic cylinder 300, retracting the wire rope at the load end. Thus, passive wave compensation is achieved by using the cylinder rod to drive the movable pulley 200 to move and compensate for changes in wire rope tension. At the same time, the controller controls the drive unit 700 to drive the winch 600 to actively participate in wave compensation based on the compensation of the hydraulic cylinder 300 and the movable pulley 200. The winch 600 can work with the hydraulic cylinder 300 to perform wave compensation when the tension changes greatly, so as to avoid the cable breaking due to excessive tension of the wire rope, damage or loss of the working equipment, or to avoid the wire rope becoming too loose and tangled due to insufficient tension, which may even cause the wire rope to become tangled and knotted, seriously affecting the safety of the operation.

[0024] In summary, this application provides a wire rope tension compensation device for marine operations, which may include: a fixed pulley 100, a movable pulley 200, a hydraulic cylinder 300, an accumulator 400, a position detector, a winch 600, a drive component 700, and a controller. During operations such as ditch digging, trawl netting, or equipment deployment and retrieval, the increased tension of the wire rope causes the protruding end of the cylinder rod 301 in the hydraulic cylinder 300 to retract towards the hydraulic cylinder 300, releasing the wire rope at the load end, and storing energy in the accumulator 400. Conversely, a decrease in wire rope tension causes the protruding end of the cylinder rod in the hydraulic cylinder 300 to extend towards the hydraulic cylinder 300, retracting the wire rope at the load end. Thus, by driving the movable pulley 200 to move via the cylinder rod, the device compensates for changes in wire rope tension, achieving passive wave compensation. At the same time, the controller controls the drive unit 700 to drive the winch 600 to actively participate in wave compensation based on the compensation of the hydraulic cylinder 300 and the movable pulley 200. The winch 600 can work with the hydraulic cylinder 300 to perform wave compensation when the tension changes greatly, so as to avoid the cable breaking due to excessive tension of the wire rope, damage or loss of the working equipment, or to avoid the wire rope becoming too loose and tangled due to insufficient tension, which may even cause the wire rope to become tangled and knotted, seriously affecting the safety of the operation.

[0025] Optional, such as Figure 3 As shown, the position detector 500 includes a first position sensor 501 and a second position sensor 502. The first position sensor 501 and the second position sensor 502 are arranged opposite each other along the moving direction of the cylinder rod 301, with the first position sensor 501 close to the movable pulley 200 and the second position sensor 502 close to the fixed pulley 100. When the extended end of the cylinder rod 301 moves the movable pulley 200 between the first position sensor 501 and the second position sensor 502, the winch 600 is in a braking state. When the cylinder rod 301 moves the movable pulley 200 to the position of the first position sensor 501, the controller controls the drive component 700 to rotate the winch 600 in the rope-reeling direction based on the position signal detected by the first position sensor 501. When the cylinder rod 301 moves the movable pulley 200 to the position of the second position sensor 502, the controller controls the drive component 700 to rotate the winch 600 in the rope-releasing direction based on the position signal detected by the second position sensor 502.

[0026] In this situation, when the tension of the wire rope connected to the load end decreases, the accumulator 400 releases energy, driving the extension end of the cylinder rod 301 to extend out of the hydraulic cylinder 300. The extension of the cylinder rod 301 in the hydraulic cylinder 300 drives the pulley 200 to move a distance to compensate for the decrease in wire rope tension, thus achieving passive wave compensation. If the extended end of the cylinder rod 301 drives the movable pulley 200 to move between the first position sensor and the equilibrium position, that is, when the distance the movable pulley 200 moves in the direction away from the fixed pulley 100 driven by the extended end of the cylinder rod 301 is less than the first threshold, the controller controls the winch 600 to be in a braking state, and the winch 600 does not participate in wave compensation; if the extended end of the cylinder rod 301 drives the movable pulley 200 to move in the direction away from the fixed pulley 100 to the target position, that is, when the distance the movable pulley 200 moves in the direction away from the fixed pulley 100 driven by the extended end of the cylinder rod is greater than the first threshold, the controller controls the winch 600 to rotate in the rope-reeling direction according to the position signal detected by the first position sensor, and the winch 600 actively participates in wave compensation to prevent the cylinder rod 301 from extending further. The position of the movable pulley 200 driven by the cylinder rod 301 slowly returns to the range set by the two position sensors as the winch 600 reels the rope. At this time, the controller controls the winch 600 to stop releasing the cable.

[0027] When the tension of the wire rope connected to the load increases, it compresses the extension end of the cylinder rod 301 and retracts into the hydraulic cylinder 300. The distance that the movable pulley 200 moves helps to compensate for the increase in wire rope tension. At the same time, the accumulator 400 stores energy to achieve passive wave compensation. If the extended end of the cylinder rod 301 drives the movable pulley 200 to move between the second position sensor and the equilibrium position, that is, when the distance the movable pulley 200 moves along the direction closer to the fixed pulley 100 driven by the telescopic end of the cylinder rod 301 is less than the second threshold, the controller controls the winch 600 to be in a braking state, and the winch 600 does not participate in wave compensation; if the telescopic end of the cylinder rod 301 drives the movable pulley 200 to move along the direction closer to the fixed pulley 100 to the target position, that is, when the distance the movable pulley 200 moves along the direction closer to the fixed pulley 100 driven by the telescopic end of the cylinder rod 301 is greater than the second threshold, the controller controls the winch 600 to rotate along the rope-laying direction according to the position signal detected by the second position sensor, and the winch 600 actively participates in wave compensation to prevent the cylinder rod 301 from retracting further. The position of the movable pulley 200 driven by the cylinder rod 301 slowly returns to the range set by the two position sensors as the winch 600 lays the rope. At this time, the controller controls the winch 600 to stop laying the cable.

[0028] When the wire rope tension is within the normal range, the winch 600 maintains normal operating conditions. For example, during retrieval and release operations, the winch 600 continues normal retrieval and release, and its brake is in the open position. During operations such as plowing and trenching, or net tracing, the brake is engaged, and the winch 600 remains stationary. When the wire rope tension decreases to the point where the winch 600 needs to retrieve the rope, it releases the engagement and rotates in the retrieval direction. When the wire rope tension increases to the point where the winch 600 needs to release the rope, it releases the engagement and rotates in the release direction. Additionally, the controller can control the rotation speed of the winch 600 via the drive component 700 to adapt to different compensation scenarios. For example, an encoder mounted on the winch 600 can be connected to the controller to detect the winch 600's rotation speed.

[0029] For implementations requiring further specifications, the position detector may include a displacement sensor mounted on the cylinder rod 301 to detect the distance the cylinder rod drives the movable pulley 200 to move away from the fixed pulley 100 and the distance it moves towards the fixed pulley 100. The controller then compares this moving distance with a set distance threshold to determine whether the winch 600 participates in tension compensation. Alternatively, the position detector may include a pull-wire sensor, with its device end mounted on the cylinder body 301 of the hydraulic cylinder 300 and its pull-wire end connected to the cylinder rod extension end, for real-time detection of the movable pulley's movement distance. Furthermore, the moving speed and acceleration of the movable pulley can be calculated using time and displacement.

[0030] In this embodiment, the number of strands of the wire rope wound on the movable pulley 200 is M, and the distance the movable pulley 200 moves away from or towards the fixed pulley 100 is S. Then, the wire rope is retracted or released by a length of 2MS. That is, when the movable pulley moves a distance S away from the fixed pulley 100, the wire rope can be retracted by a length of 2MS; or, when the movable pulley moves a distance S towards the fixed pulley 100, the wire rope can be released by a length of 2MS. For example, in the figure, the number of strands of the wire rope wound on the movable pulley 200 is 8.

[0031] In this application, as Figure 2 and Figure 3As shown, the marine operation wire rope tension compensation device further includes: a frame 800, an anti-loosening baffle 900, a return spring 1000, and a first position detector 1100. The anti-loosening baffle 900 is located on the side of the movable pulley 200 away from the fixed pulley 100 and is slidably connected to the frame 800. The two ends of the return spring 1000 are respectively in contact with the side of the anti-loosening baffle 900 away from the movable pulley 200 and the frame 800. The first position detector 1100 is installed on the frame 800 and connected to the controller to detect the position change of the anti-loosening baffle 900. When the tension of the wire rope S connected to the load end is zero, the cylinder rod 301 drives the movable pulley 200 to move to abut against the anti-loosening baffle 900 and clamp the wire rope S. At the same time, the controller controls the winch 600 to brake according to the position change signal of the anti-loosening baffle 900 detected by the first position detector 1100.

[0032] In this configuration, by providing a flexibly movable anti-loosening baffle 900 on one side of the movable pulley 200, when the tension at the load end of the wire rope S essentially disappears to zero (e.g., the load end of the wire rope is not connected to a load), the lever 301 drives the movable pulley 200 to move closer to the anti-loosening baffle 900 until the wire rope is clamped between the movable pulley 200 and the anti-loosening baffle 900 and remains stationary. The anti-loosening baffle 900 is subjected to a certain force, moving and compressing the return spring 1000. Simultaneously, the first position detector 1100 detects the position signal of the anti-loosening baffle 90, and the controller, based on this position signal, controls the winch 600 to remain stationary via the drive component 700, preventing the wire rope on the winch 600 from becoming loose and tangled due to loosening. Furthermore, after the movable pulley 200 moves away from the anti-loosening baffle 900, the wire rope is released, and the anti-loosening baffle 900 moves back to its initial position under the action of the return spring 1000.

[0033] For example, such as Figure 4 As shown, the movable pulley 200 has rope grooves C1 provided at each winding position. The anti-loosening baffle 900 has an arc-shaped surface on the side facing the movable pulley 200 that mates with the circumferential side of the movable pulley 200. The anti-loosening baffle also has a rope-pressing part T fixed on the arc-shaped surface that corresponds one-to-one with each of the multiple rope grooves C1. In this way, the rope grooves C1 provided on the movable pulley 200 ensure the orderly winding of the wire rope on the movable pulley 200 and prevent it from shifting along the axial direction of the movable pulley 200. The rope-pressing parts T provided on the anti-loosening baffle 900 that correspond one-to-one with each of the multiple rope grooves C1 effectively clamp and limit the wire rope S after engaging with the corresponding rope groove C1.

[0034] Here, as Figure 2As shown, the fixed pulley 100, the movable pulley 200, the hydraulic cylinder 300, the accumulator 400, the first position sensor 501, and the second position sensor 502 can all be mounted on the frame 800. Additionally, the frame 800 may have a guide rail 801, and the end of the movable pulley 200 can be slidably connected to the guide rail 801 to ensure the direction of movement of the movable pulley 200.

[0035] In the embodiments of this application, such as Figure 2 As shown, the marine operation wire rope tension compensation device includes: a first limiter 1200 located on the side of the movable pulley 200 away from the fixed pulley 100, and a second limiter 1300 located on the side of the fixed pulley 100 away from the movable pulley 200, and both the first limiter 1200 and the second limiter 1300 are mounted on the frame 800. The first limiter 1200 has a first limiting space K1 directly opposite the winding end of the wire rope S on the fixed pulley 100, and the wire rope passes through this first limiting space K1; the second limiter 1300 has a second limiting space directly opposite the winding end of the wire rope S on the movable pulley 200, and the wire rope passes through this second limiting space. In this case, by setting a second limiter 1300 on one side of the fixed pulley 100 and a first limiter 1200 on the other side of the movable pulley 200, the second limiter 1300 can effectively ensure the relative position between the part of the wire rope S near the fixed pulley 100 and the fixed pulley 100, and the first limiter 1200 can effectively ensure the relative position between the part of the wire rope S near the movable pulley 200 and the movable pulley 200, thus preventing the wire rope from moving arbitrarily and ensuring the stability of the wire rope's winding and unwinding.

[0036] Optional, please refer to Figure 4 Both the first limiter 1200 and the second limiter 1300 include: an outer frame A1, two first guide rollers B1 rotatably connected to the outer frame A1 and arranged opposite each other along a first direction f1, and two second guide rollers B2 rotatably connected to the outer frame A1 and arranged opposite each other along a second direction f2. The two first guide rollers B1 and the two second guide rollers B2 are stacked along a third direction f3 to form a first limiting space K1 or a second limiting space K2. Here, the first direction f1, the second direction f2, and the third direction f2 are perpendicular to each other, and the third direction f3 is parallel to a preset direction. In this case, after the wire rope contacts the guide rollers, the guide rollers can rotate relative to the outer frame under the force of the wire rope, thus reducing the friction between the guide rollers and the wire rope and reducing the wear of the wire rope after long-term use.

[0037] In this application, as Figure 2As shown, there are two hydraulic cylinders 300. The bottom of the cylinder body of the two hydraulic cylinders 300 is connected to the two ends of the fixed pulley 100 on both sides, and the extended ends of the cylinder rods of the two hydraulic cylinders 300 are connected to the two ends of the movable pulley 200 on both sides. Here, the pressure of the two hydraulic cylinders 300 can be the same, and the two hydraulic cylinders 300 can be used with two accumulators 400 with the same pressure.

[0038] For example, such as Figure 2 and Figure 5 As shown, the drive component 700 includes: a rotation drive 701, a brake 702, and a brake drive 703. The rotation drive 701 is driveably connected to the winch 600. The brake 702 cooperates with the winch 600 and is driveably connected to the brake drive 703. The rotation drive 701 drives the winch 600 to rotate, and the brake drive 703 drives the winch 600 to brake or release via the brake 702. For example, the rotation drive 701 may include: a motor 701a and a gearbox 701b. The two output shafts of the gearbox 701b can be driveably connected to the motor 701a and the winch 600 respectively. The motor 701a can be connected to a controller.

[0039] Optional, such as Figure 5 As shown, the braking component 702 includes an annular brake band 702a wound around the end of the winch 600. The braking drive component 703 achieves braking by controlling the annular brake band 702a to grip the winch 600, or by controlling the annular brake band 702a to release the winch 600. Here, in order to ensure the neat arrangement of the wire rope on the winch 600, a cable arranger 1400 is provided between the winch 600 and the movable pulley 200. This cable arranger 1400 can neatly wind the wire rope around the winch 600.

[0040] In summary, this application provides a wire rope tension compensation device for marine operations, which may include: a fixed pulley, a movable pulley, a hydraulic cylinder, an accumulator, a position detector, a winch, a drive component, and a controller. During operations such as ditch digging, trawl netting, or equipment deployment and retrieval, the increased tension of the wire rope causes the cylinder rod of the hydraulic cylinder to retract, releasing the wire rope at the load end, and the accumulator stores energy. Conversely, the decreased tension of the wire rope causes the cylinder rod of the hydraulic cylinder to extend, retracting the wire rope at the load end. Thus, by driving the movable pulley to move via the cylinder rod, the device compensates for changes in wire rope tension, achieving passive wave compensation. At the same time, the controller controls the drive components to drive the winch to actively participate in wave compensation based on the compensation of the hydraulic cylinder and the moving pulley. The winch can work with the hydraulic cylinder to perform wave compensation when the tension changes greatly, so as to avoid the cable breaking due to excessive tension of the wire rope, damage or loss of the working equipment, or to avoid the wire rope becoming too loose and tangled due to insufficient tension, which can seriously affect the safety of the operation.

[0041] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0042] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A tension compensation device for steel wire ropes used in marine operations, characterized in that, include: Fixed pulleys, movable pulleys, hydraulic cylinders, accumulators, position detectors, winches, drive components, and controllers; The fixed pulley and the movable pulley are arranged opposite each other in a preset direction. The fixed pulley and the movable pulley each have multiple winding positions. Steel wire ropes are wound around the multiple winding positions of the fixed pulley and the multiple winding positions of the movable pulley. The two ends of the steel wire ropes are respectively connected to the load and the winch. The bottom of the cylinder body of the hydraulic cylinder is connected to the end of the fixed pulley, and the extended end of the cylinder rod is synchronously connected to the end of the movable pulley. The accumulator is connected to the hydraulic cylinder. The position detector is used to detect the movement position or movement distance of the cylinder rod extension end. The drive component is connected to the winch drive. Both the position detector and the drive component are electrically connected to the controller. The controller is used to control the rotation state of the winch through the drive component according to the movement position or movement distance of the cylinder rod extension end.

2. The marine operation wire rope tension compensation device according to claim 1, characterized in that, The position detector includes a first position sensor and a second position sensor, which are arranged opposite to each other along the moving direction of the cylinder rod, with the first position sensor closer to the movable pulley and the second position sensor closer to the fixed pulley. Specifically, the cylinder rod extends to move the movable pulley between the first and second position sensors, and the winch is in a braking state. When the cylinder rod moves the movable pulley away from the fixed pulley to the first position sensor, the controller controls the drive component to rotate the winch in the rope-reeling direction based on the position signal detected by the first position sensor. When the cylinder rod moves the movable pulley closer to the fixed pulley to the second position sensor, the controller controls the drive component to rotate the winch in the rope-releasing direction based on the position signal detected by the second position sensor. Alternatively, the position detector may include a pull-wire sensor, the device end of which is mounted on the cylinder body of the hydraulic cylinder, and the pull-wire end of which is connected to the extended end of the cylinder rod, for real-time detection of the movement distance of the movable pulley.

3. The marine operation wire rope tension compensation device according to claim 1, characterized in that, The number of strands of the wire rope wound on the movable pulley is M, and the moving distance of the movable pulley away from or close to the fixed pulley is S. Then the length of the wire rope to be recovered or released is 2MS.

4. The marine operation wire rope tension compensation device according to claim 2, characterized in that, The device further includes: a frame, an anti-loosening baffle, a return spring, and a first position detector. The anti-loosening baffle is located on the side of the movable pulley away from the fixed pulley and is slidably connected to the frame. The two ends of the return spring are respectively in contact with the side of the anti-loosening baffle away from the movable pulley and the frame. The first position detector is installed on the frame and connected to the controller to detect changes in the position of the anti-loosening baffle. When the tension at the load end of the wire rope is zero, the cylinder rod drives the movable pulley to move to abut against the anti-loosening baffle and clamp the wire rope. At the same time, the controller controls the winch brake according to the position change signal of the anti-loosening baffle detected by the first position detector.

5. The marine operation wire rope tension compensation device according to claim 4, characterized in that, The movable pulley has rope grooves provided at each winding position. The anti-loosening baffle has an arc-shaped surface on the side facing the movable pulley that matches the circumferential side of the movable pulley. The anti-loosening baffle also has a rope-pressing part fixed on the arc-shaped surface that corresponds to each of the multiple rope grooves.

6. The marine operation wire rope tension compensation device according to claim 4, characterized in that, The device includes: a first limiter located on the side of the movable pulley away from the fixed pulley, and a second limiter located on the side of the fixed pulley away from the movable pulley, both the first and second limiters being mounted on a frame; wherein the first limiter has a first limiting space directly opposite the winding end of the wire rope on the fixed pulley; and the second limiter has a second limiting space directly opposite the winding end of the wire rope on the movable pulley.

7. The marine operation wire rope tension compensation device according to claim 6, characterized in that, Both the first limiter and the second limiter include: an outer frame, two first guide rollers rotatably connected to the outer frame and arranged opposite each other along a first direction, and two second guide rollers rotatably connected to the outer frame and arranged opposite each other along a second direction. The two first guide rollers and the two second guide rollers are stacked along a third direction to form the first limiting space or the second limiting space. The first direction, the second direction and the third direction are perpendicular to each other, and the third direction is parallel to the preset direction.

8. The marine operation wire rope tension compensation device according to claim 1, characterized in that, The driving component includes: a rotation drive, a brake, and a brake drive. The rotation drive is connected to the winch in a transmission manner. The brake is engaged with the winch and is connected in a transmission manner to the brake drive. The rotation drive drives the rotation of the winch, and the brake drive drives the winch to brake or release the winch through the brake.

9. The marine operation wire rope tension compensation device according to claim 8, characterized in that, The braking component includes an annular brake band wrapped around the end of the winch. The braking drive component achieves braking by controlling the annular brake band to grip the winch, or by controlling the annular brake band to release the winch.

10. A method for compensating tension in steel wire ropes used in marine operations, characterized in that, The method is applied to the marine operation wire rope tension compensation device according to any one of claims 1-9, and the method includes: obtaining the moving position of the lever extension end driving the movable pulley; When the extended end of the cylinder rod drives the movable pulley to move between the first position sensor and the second position sensor, the winch is controlled to be in a braking state. When the cylinder rod drives the movable pulley to move to the first position sensor, the winch is controlled to rotate in the rope winding direction. When the cylinder rod drives the movable pulley to the second position sensor, it controls the winch to rotate in the direction of rope release.

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