Device and method for adjusting length of rake pipe of trailing suction dredger

Abstract

The invention discloses a rake pipe length adjusting device and method of a trailing suction dredger, and belongs to the technical field of dredgers. A rake pipe length adjusting device of a drag suction dredger comprises a portal frame fixedly arranged on a deck, and further comprises two sets of movable transverse frames, two sets of movable transverse frames, two sets of movable transverse frames, two sets of movable transverse frames and two sets of movable transverse frames, and the movable transverse frames are arranged in a sliding mode and are perpendicular to the portal frame. The portal frame is provided with a first winch assembly used for driving the movable transverse frame to move in the length direction of the portal frame. The movable seat and the movable transverse frame are arranged in a sliding manner; according to the invention, wharfs, dispatch, external hoisting machinery and manpower support are not needed, all work of lengthening and shortening the ship rake pipe can be completely realized by using equipment and personnel of the drag suction dredger, the construction period and the construction cost are reduced, and when the rake head bracket and the rake pipe are hoisted, the two ends of the hoisting mechanism are stable in load bearing, and the situation that one end is overlarge in stress is avoided; and the risk that the equipment is damaged when hoisting a heavy object is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of dredgers, and in particular to a device and method for adjusting the length of a rake pipe of a trailing suction dredger. Background Art

[0002] During the dredging process, the channel grade is different and the dredging depth requirements are also different. Therefore, the trailing suction vessel needs to change the length of the rake pipe to adapt to different dredging depth requirements. Changing the length of the rake pipe generally involves disconnecting the suction pipe between the rake head hanger and the middle hanger, adding or shortening a section of the suction pipe, and simultaneously adding or shortening the high-pressure flushing pipe, hydraulic pipe, vacuum pipe, sensor cable, etc., and shifting the rake head hanger and the rake head support rod accordingly, so as to adapt to different dredging depth requirements by changing the length of the rake pipe.

[0003] There are two conventional systems and methods for changing the length of the rake pipe. One is to use a dock crane. The rake suction hopper finds the nearest dock to dock and uses the dock crane corresponding to the tonnage of the rake head hanger on the dock to lift it. The other is to rent a floating crane. The rake suction hopper finds a sheltered anchorage, and the floating crane is anchored to one side of the rake suction hopper. After the rake head mechanism, rake pipe, and rake head hanger are disassembled, the rake pipe is lifted down as a single unit. However, the use of floating cranes or dock cranes has limitations. It is necessary to find suitable floating cranes, dock cranes, and docks. The construction of lengthening and shortening the rake pipe cannot be realized in time. There are also disadvantages of long construction period and high construction cost. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and to propose a device and method for adjusting the length of a rake pipe of a trailing suction dredger.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A device for adjusting the length of a rake pipe of a trailing suction dredger comprises a gantry fixed on a deck, and further comprises:

[0007] A movable cross frame, wherein two sets of movable cross frames are provided, the two sets of movable cross frames are slidably arranged with the gantry and are vertically distributed with the gantry, and the gantry is provided with a first winch assembly for driving the movable cross frame to move along the length direction of the gantry;

[0008] A moving seat, wherein the moving seat is slidably arranged with the moving cross frame, and the moving cross frame is provided with a second winch assembly for driving the moving seat to move along the length direction of the moving cross frame; and

[0009] A lifting mechanism, which is arranged on the movable seat and is used for lifting the mud pipe of the drag head;

[0010] Wherein, the lifting mechanism is provided with a self-balancing component.

[0011] Preferably, the first winch assembly and the second winch assembly have the same structure, and the first winch assembly and the second winch assembly both include a support frame, and the two support frames are respectively connected to the gantry and the movable horizontal frame, and each of the support frames is fixed with a winding motor, and the output shaft of the winding motor is connected to a winding rod rotating on the support frame, and the winding rod is provided with a first drum and a second drum, and the first drum and the second drum are both wound with a first pull rope, and the two first pull ropes of the first winch assembly are respectively connected to the movable horizontal frame from both ends of the gantry, and the two first pull ropes of the second winch assembly are respectively connected to the movable seat from both ends of the movable horizontal frame.

[0012] Preferably, the lifting mechanism includes a lifting motor fixed on a moving seat, the output shaft of the lifting motor is connected to a rotating rod rotating on the moving seat, a third reel is provided on the rotating rod, a second pull rope is wound around the third reel, an end of the second pull rope away from the third reel is connected to an adjusting plate, third pull ropes are provided on both sides of the adjusting plate, and a hook is provided at one end of the third pull rope away from the adjusting plate.

[0013] Preferably, the self-balancing component is arranged on the adjustment plate, and the self-balancing component includes a winding part for winding and releasing the third pull rope, a counterweight part for limiting the operation of the winding part, and a limiting part for limiting the lateral movement of the counterweight part.

[0014] Preferably, the winding part includes a rotating rod rotatably connected to the movable seat, a torsion spring is arranged between the rotating rod and the adjustment plate, the torsion spring is sleeved on the rotating rod, a fourth drum is arranged on the rotating rod, and the third pull rope is wound and connected to the fourth drum.

[0015] Preferably, the counterweight portion includes a working groove provided on the adjusting plate, a counterweight block slidably connected in the working groove, and an insertion rod fixed on the side of the counterweight block; the fourth reel is provided with circumferentially uniform insertion holes matching the insertion rod; the limiting portion includes movable grooves provided on both sides of the working groove, a stopper slidably connected in the movable groove, and a first elastic element provided between the stopper and the inner wall of the movable groove; a first inclined surface which is against the movement of the counterweight block is provided on the side of the stopper away from the first elastic element.

[0016] Preferably, the limiting portion also includes a positioning groove provided on the upper side of the working groove, a positioning block slidably connected in the positioning groove, and a second elastic element arranged between the positioning block and the inner wall of the positioning groove; a positioning hole matching the positioning block is provided on the top of the counterweight block; a movable plug plate is slidably connected in the adjusting plate; a slot matching the movable plug plate is provided on the positioning block; a second inclined surface is provided at one end of the positioning block away from the slot; a groove movably abutted against the second inclined surface is provided on the stop block; a slider is fixedly provided on the movable plug plate; a sliding groove for sliding the slider is provided on the adjusting plate; a third elastic element is provided between the inner wall of the sliding groove and the slider.

[0017] Preferably, the movable plug plates on both sides of the adjustment plate are provided with rack plates, and a driven gear meshing with the two rack plates is rotatably connected inside the adjustment plate.

[0018] Preferably, a fourth pull rope is provided on the positioning block, and one end of the fourth pull rope away from the positioning block passes through the adjustment plate and is connected to a pull ring.

[0019] The present invention also discloses a method for adjusting the length of a rake pipe of a trailing suction dredger, which uses a device for adjusting the length of a rake pipe of a trailing suction dredger to perform the adjustment, and comprises the following steps:

[0020] S1: The staff first disassembles and separates the rake pipe between the rake head hanger and the rake middle hanger. At this time, the rake head hanger and the rake middle hanger are still connected to the hull. Then the staff controls the first winch assembly to move one of the movable cross frames on the gantry to the upper side of the rake head hanger, and then controls the second winch assembly to move the movable seat to the upper side of the rake head hanger, and hooks the rake head hanger through the hook at the bottom of the lifting mechanism, and then releases the connection limit between the rake head hanger and the hull, but at this time the support on the hull can still support the rake head hanger;

[0021] S2: The staff pulls the fourth pull rope through the pull ring, and the fourth pull rope applies tension to the positioning block in the positioning slot. The positioning block moves up from the positioning slot and pushes the movable plug plate. The movable plug plate avoids the positioning block. After the slot is aligned with the movable plug plate, the movable plug plate is reset and inserted into the slot. The position of the positioning block is limited at this time, and the positioning block no longer limits the counterweight block.

[0022] S3: Then the staff controls the lifting mechanism to work, the lifting motor drives the third drum to rotate at a low speed through the rotating rod, the third drum slowly reels the second pull rope, and the second pull rope slowly lifts the rake head hanger through the adjustment plate, the third pull rope and the hook;

[0023] S4: Due to the irregular shape and structure of the drag head hanger, the center of gravity of the drag head hanger is not in the center position, and then when the drag head hanger is lifted, the adjustment plate is driven to tilt through the third pull rope, and one end of the drag head hanger where the center of gravity is located is lower than the other end of the drag head hanger;

[0024] After the adjusting plate is tilted, the internal counterweight block slides in the working groove under the action of its own gravity, and the counterweight block applies a thrust to the block placed on the lower side of the tilt adjusting plate at this time, and the block located on the lower side is forced to move upward into the movable groove, the first elastic element is compressed, and the inner wall of the groove of the block no longer abuts against the second inclined surface of the movable plug plate, and the movable plug plate moves out of the slot of the positioning block. The movable plug plate on the other side also moves out of the slot under the meshing of the rack plate and the driven gear, and the positioning block in the positioning slot is no longer subjected to force and moves under the elastic force of the second elastic element, so that the bottom of the positioning block abuts against the top wall of the counterweight block;

[0025] After the counterweight block moves, the insertion rod at the lower end continues to penetrate into the insertion hole of the fourth drum on the same side, and the insertion rod at the higher end of the counterweight block moves out of the insertion hole of the fourth drum on the same side, so that the fourth drum on the high side of the adjustment plate is no longer restricted, and the third pull rope connected to the fourth drum is naturally released under the gravity of the drag head hanger, and the side of the drag head hanger pulled up by the lifting mechanism is lowered, and finally the adjustment plate is placed horizontally and the forces on both sides are stable. At this time, the lengths of the third pull ropes on both sides of the adjustment plate are different;

[0026] After the adjustment plate is placed horizontally, the counterweight block in the adjustment plate is reset, and the insertion rods on both sides of the counterweight block are respectively plugged into the insertion holes of the fourth reel on both sides of the adjustment plate. At this time, the positioning groove of the counterweight block is aligned with the positioning block, and the positioning block is inserted into the positioning groove under the elastic force of the second elastic element, which limits the position of the counterweight block so that the counterweight block will not shake violently during the lifting process, and the rake head hanger can be lifted stably;

[0027] S5: When the staff needs to extend the rake pipe, the staff moves the hoisting rake head bracket away from the rake middle bracket, lifts the extended rake pipe through the hoisting mechanism on another movable horizontal frame on the gantry, and places the extended rake pipe between the rake middle bracket and the rake head bracket, so that the rake pipe at the rake head bracket and the rake pipe at the rake middle bracket are connected with the extended rake pipe to complete the adjustment of the rake pipe length;

[0028] When the staff needs to shorten the rake pipe, they disconnect part of the rake pipe between the rake head hanger and the rake middle hanger, then move the hoisting rake head bracket closer to the rake middle bracket, and reconnect the rake pipe between the rake head hanger and the rake middle hanger.

[0029] Compared with the prior art, the present invention provides a device and method for adjusting the length of a rake pipe of a trailing suction dredger, which has the following beneficial effects:

[0030] 1. The device and method for adjusting the length of the rake pipe of the trailing suction dredger, by arranging a lifting mechanism on the hull, does not require docks, dispatching, external lifting machinery and manpower support, and can completely solve all the work of lengthening and shortening the ship's rake pipe by using the trailing suction dredger's own equipment and personnel, thereby reducing the construction period and construction cost.

[0031] 2. The device and method for adjusting the length of the rake tube of the trailing suction dredger are provided with a self-balancing component on the lifting mechanism. When the rake head bracket and the rake tube are lifted, the load-bearing at both ends of the lifting mechanism is stabilized to avoid excessive force on one end, thereby reducing the risk of damage to the equipment when lifting heavy objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the present invention;

[0033] Figure 2 It is a partial structural schematic diagram of the present invention;

[0034] Figure 3 It is a partial cross-sectional structural schematic diagram of the present invention;

[0035] Figure 4 For the present invention Figure 3 A partial enlarged structural diagram of the middle part;

[0036] Figure 5 For the present invention Figure 3 A schematic diagram of the partially enlarged structure of the middle B part;

[0037] Figure 6 is a schematic structural diagram of a fourth reel of the present invention;

[0038] Figure 7 It is a schematic diagram of the cross-sectional structure of the stopper of the present invention;

[0039] Figure 8 It is a schematic diagram of the structure of both sides of the driven gear of the present invention.

[0040] In the figure: 1, gantry; 2, mobile horizontal frame; 3, mobile seat; 4, support frame; 401, winding motor; 402, winding rod; 403, first drum; 404, second drum; 405, first pull rope; 5, lifting motor; 501, rotating rod; 502, third drum; 503, second pull rope; 504, adjusting plate; 505, third pull rope; 506, hook; 6, winding part; 601, rotating rod; 602, torsion spring; 603, fourth drum; 6031, socket; 7, counterweight part ; 701, working groove; 702, counterweight block; 7021, positioning hole; 703, insertion rod; 8, limiting part; 801, movable groove; 802, stopper; 8021, groove; 803, first elastic element; 804, positioning groove; 805, positioning block; 8051, slot; 806, second elastic element; 9, movable plug plate; 901, slider; 10, slide groove; 1001, third elastic element; 11, fourth pull rope; 111, pull ring; 12, rack plate; 121, driven gear. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components; for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Example: Refer to Figure 1-3 A device for adjusting the length of a rake pipe of a trailing suction dredger comprises a gantry 1 fixed on a deck, and further comprises:

[0045] The movable cross frame 2 is provided with two groups, the two groups of movable cross frames 2 are slidably arranged with the gantry 1 and are vertically distributed with the gantry 1, and the gantry 1 is provided with a first winch assembly for driving the movable cross frame 2 to move along the length direction of the gantry 1;

[0046] A movable seat 3, wherein the movable seat 3 is slidably arranged with the movable horizontal frame 2, and the movable horizontal frame 2 is provided with a second winch assembly for driving the movable seat 3 to move along the length direction of the movable horizontal frame 2; and

[0047] A lifting mechanism, which is arranged on the moving seat 3 and is used for lifting the mud pipe of the drag head;

[0048] Wherein, a self-balancing component is arranged on the lifting mechanism.

[0049] When the rake pipe needs to be shortened, part of the rake pipe between the rake head bracket and the rake middle bracket is disassembled, and only the lifting mechanism on one of the mobile horizontal frames 2 is needed to lift the rake head bracket toward the rake middle bracket, and then the rake pipes are connected to each other to complete the adjustment of the rake pipe length. There is no need for docks, dispatching, external lifting machinery and manpower support. The equipment and personnel of the drag-suction vessel itself can be fully used to solve all the work of lengthening and shortening the ship's rake pipe, thereby reducing the construction period and construction cost. When lifting the rake head bracket and the rake pipe, the lifting mechanism makes the load-bearing at both ends stable through the self-balancing component, so as to avoid excessive force on one end, thereby reducing the risk of damage to the equipment when lifting heavy objects.

[0050] Reference Figure 1-3 As a preferred technical solution of the present invention, the first winch assembly and the second winch assembly have the same structure. The first winch assembly and the second winch assembly both include a support frame 4. The two support frames 4 are respectively connected to the gantry 1 and the moving horizontal frame 2. A winding motor 401 is fixedly provided on each support frame 4. The output shaft of the winding motor 401 is connected to a winding rod 402 rotating on the support frame 4. The winding rod 402 is provided with a first drum 403 and a second drum 404. The first drum 403 and the second drum 404 are both wound with a first pull rope 405. The two first pull ropes 405 of the first winch assembly are respectively connected to the moving horizontal frame 2 from both ends of the gantry 1, and the two first pull ropes 405 of the second winch assembly are respectively connected to the moving seat 3 from both ends of the moving horizontal frame 2.

[0051] Specifically, when the first winch assembly is working, the winding motor 401 of the first winch assembly drives the first drum 403 and the second drum 404 to rotate through the winding rod 402, and when the first drum 403 winds up the first pull rope 405, the second drum 404 releases the first pull rope 405, so that when the first winch assembly is working, the first pull rope 405 of the first winch assembly pulls the movable horizontal frame 2 to move horizontally on the gantry 1, thereby adjusting the position of the movable horizontal frame 2; similarly, when the second winch assembly is working, the first pull rope 405 of the second winch assembly pulls the movable seat 3 to move on the movable horizontal frame 2, thereby adjusting the position of the movable seat 3 and the lifting mechanism on the movable horizontal frame 2.

[0052] Reference Figure 1-3As a preferred technical solution of the present invention, the lifting mechanism includes a lifting motor 5 fixed on the moving seat 3, the output shaft of the lifting motor 5 is connected to a rotating rod 501 rotating on the moving seat 3, a third drum 502 is provided on the rotating rod 501, a second pull rope 503 is wound around the third drum 502, the end of the second pull rope 503 away from the third drum 502 is connected to an adjusting plate 504, third pull ropes 505 are provided on both sides of the adjusting plate 504, and a hook 506 is provided at one end of the third pull rope 505 away from the adjusting plate 504.

[0053] Specifically, when the lifting mechanism is working, the lifting motor 5 is controlled to operate. The lifting motor 5 drives the third drum 502 to rotate through the rotating rod 501. The third drum 502 releases the second pull rope 503, and the adjustment plate 504 connected to the bottom end of the second pull rope 503 is lowered, so that the hook 506 connected to the third pull rope 505 on the lower side of the adjustment plate 504 moves downward, which is convenient for hooking and lifting the rake head bracket.

[0054] Reference Figure 1-8 As a preferred technical solution of the present invention, the self-balancing component is arranged on the adjustment plate 504, and the self-balancing component includes a winding part 6 for winding and releasing the third pull rope 505, a counterweight part 7 for limiting the operation of the winding part 6, and a limiting part 8 for limiting the lateral movement of the counterweight part 7.

[0055] Furthermore, the winding part 6 includes a rotating rod 601 rotatably connected to the movable seat 3 , a torsion spring 602 is arranged between the rotating rod 601 and the adjusting plate 504 , the torsion spring 602 is sleeved on the rotating rod 601 , a fourth reel 603 is arranged on the rotating rod 601 , and the third pull rope 505 is wound and connected to the fourth reel 603 .

[0056] Furthermore, the counterweight portion 7 includes a working groove 701 opened on the adjustment plate 504, a counterweight block 702 slidably connected in the working groove 701, and an insertion rod 703 fixed on the side of the counterweight block 702. The fourth reel 603 is provided with circumferentially uniform insertion holes 6031 matching the insertion rod 703. The limiting portion 8 includes movable grooves 801 opened on both sides of the working groove 701, a stopper 802 slidably connected in the movable groove 801, and a first elastic element 803 arranged between the stopper 802 and the inner wall of the movable groove 801. A first inclined surface that is against the movement of the counterweight block 702 is opened on the side of the stopper 802 away from the first elastic element 803.

[0057] Furthermore, the limiting portion 8 also includes a positioning groove 804 provided on the upper side of the working groove 701, a positioning block 805 slidably connected in the positioning groove 804, and a second elastic element 806 arranged between the positioning block 805 and the inner wall of the positioning groove 804. A positioning hole 7021 matching the positioning block 805 is provided on the top of the counterweight block 702. A movable plug plate 9 is slidably connected in the adjustment plate 504. A slot 8051 matching the movable plug plate 9 is provided on the positioning block 805. A second inclined surface is provided at one end of the positioning block 805 away from the slot 8051. A groove 8021 movably abutting against the second inclined surface is provided on the stopper 802. A slider 901 is fixedly provided on the movable plug plate 9. A sliding groove 10 for sliding the slider 901 is provided on the adjustment plate 504. A third elastic element 1001 is provided between the inner wall of the sliding groove 10 and the slider 901.

[0058] Furthermore, the movable plug plates 9 on both sides of the adjustment plate 504 are provided with rack plates 12 , and a driven gear 121 meshing with the two rack plates 12 is rotatably connected inside the adjustment plate 504 .

[0059] Furthermore, a fourth pull rope 11 is provided on the positioning block 805 , and one end of the fourth pull rope 11 away from the positioning block 805 passes through the adjustment plate 504 and is connected to a pull ring 111 .

[0060] Specifically, the staff controls the operation of the lifting mechanism, the lifting motor 5 drives the third drum 502 to rotate at a low speed through the rotating rod 501, the third drum 502 slowly reels the second pull rope 503, and the second pull rope 503 slowly lifts the rake head hanger through the adjusting plate 504, the third pull rope 505 and the hook 506; due to the irregular shape and structure of the rake head hanger, the center of gravity of the rake head hanger is not at the center position, and then when the rake head hanger is lifted, the adjusting plate 504 is driven to tilt through the third pull rope 505, and the end where the center of gravity of the rake head hanger is located is lower than the other end of the rake head hanger; after the adjusting plate 504 tilts, the internal counterweight block 702 slides under the action of its own gravity on the working The counterweight block 702 applies a thrust to the stopper 802 located at the lower side of the tilt adjustment plate 504, and the stopper 802 located at the lower side is forced to move upward into the movable groove 801. The first elastic element 803 is compressed, and the inner wall of the groove 8021 of the stopper 802 no longer abuts against the second inclined surface of the movable plug plate 9. The movable plug plate 9 moves out of the slot 8051 of the positioning block 805. The movable plug plate 9 on the other side also moves out of the slot 8051 under the meshing of the rack plate 12 and the driven gear 121. The positioning block 805 in the positioning groove 804 is no longer subjected to force and moves under the elastic force of the second elastic element 806, so that the bottom of the positioning block 805 is aligned with the counterweight block 706. 02 top wall abuts; after the counterweight 702 moves, the insertion rod 703 at the lower end continues to penetrate into the insertion hole 6031 of the fourth drum 603 on the same side, and the insertion rod 703 at the higher end of the counterweight 702 moves out of the insertion hole 6031 of the fourth drum 603 on the same side, so that the fourth drum 603 on the high side of the adjustment plate 504 is no longer restricted, and the third pull rope 505 connected to the fourth drum 603 is naturally released under the gravity of the rake head hanger, and the side of the rake head hanger pulled up by the lifting mechanism is lowered, and finally the adjustment plate 504 is placed horizontally and the forces on both sides are stable. At this time, the lengths of the third pull ropes 505 on both sides of the adjustment plate 504 are different; when the adjustment plate 504 is placed horizontally After that, the counterweight block 702 in the adjustment plate 504 is reset, and the insertion rods 703 on both sides of the counterweight block 702 are respectively connected to the insertion holes 6031 of the fourth reel 603 on both sides of the adjustment plate 504. At this time, the positioning groove 804 of the counterweight block 702 is aligned with the positioning block 805, and the positioning block 805 is inserted into the positioning groove 804 under the elastic force of the second elastic element 806, which restricts the position of the counterweight block 702, so that the counterweight block 702 will not shake violently during the lifting process, and the rake head hanger can be lifted stably; the load-bearing at both ends of the lifting mechanism is stable, avoiding excessive force on one end, causing excessive load on the pull rope and the lifting mechanism, thereby reducing the risk of damage to the equipment when lifting heavy objects.

[0061] The present invention also discloses a method for adjusting the length of a rake pipe of a trailing suction dredger, which uses a device for adjusting the length of a rake pipe of a trailing suction dredger to perform the adjustment, and comprises the following steps:

[0062] S1: The staff first disassembles and separates the rake pipe between the rake head hanger and the rake middle hanger. At this time, the rake head hanger and the rake middle hanger are still connected to the hull. Then the staff controls the first winch assembly to move one of the movable cross frames 2 on the gantry 1 to the upper side of the rake head hanger, and then controls the second winch assembly to move the movable seat 3 to the upper side of the rake head hanger, and hooks the rake head hanger through the hook 506 at the bottom of the lifting mechanism, and then releases the connection limit between the rake head hanger and the hull, but at this time the support on the hull can still support the rake head hanger;

[0063] S2: The staff pulls the fourth pull rope 11 through the pull ring 111, and the fourth pull rope 11 applies tension to the positioning block 805 in the positioning slot 804. The positioning block 805 moves up from the positioning slot 804 and pushes the movable plug plate 9. The movable plug plate 9 avoids the positioning block 805. After the slot 8051 is aligned with the movable plug plate 9, the movable plug plate 9 is reset and inserted into the slot 8051, and the position of the positioning block 805 is limited at this time, and the positioning block 805 no longer limits the counterweight block 702;

[0064] S3: Then the staff controls the lifting mechanism to work, the lifting motor 5 drives the third drum 502 to rotate at a low speed through the rotating rod 501, the third drum 502 slowly reels the second pull rope 503, and the second pull rope 503 slowly lifts the rake head hanger through the adjustment plate 504, the third pull rope 505 and the hook 506;

[0065] S4: Due to the irregular shape and structure of the drag head hanger, the center of gravity of the drag head hanger is not in the center position, and then when the drag head hanger is lifted, the third pull rope 505 drives the adjustment plate 504 to tilt, and one end of the drag head hanger where the center of gravity is located is lower than the other end of the drag head hanger;

[0066] After the adjustment plate 504 is tilted, the internal counterweight block 702 slides in the working groove 701 under the action of its own gravity, and the counterweight block 702 applies a thrust to the stopper 802 placed on the lower side of the tilt adjustment plate 504 at this time, and the stopper 802 located on the lower side is forced to move upward into the movable groove 801, and the first elastic element 803 is compressed, and the inner wall of the groove 8021 of the stopper 802 no longer abuts against the second inclined surface of the movable plug plate 9, and the movable plug plate 9 moves out of the slot 8051 of the positioning block 805, and the movable plug plate 9 on the other side also moves out of the slot 8051 under the meshing of the rack plate 12 and the driven gear 121, and the positioning block 805 in the positioning groove 804 is no longer subjected to force and moves under the elastic force of the second elastic element 806, so that the bottom of the positioning block 805 abuts against the top wall of the counterweight block 702;

[0067] After the counterweight 702 moves, the insertion rod 703 at the lower end continues to penetrate into the insertion hole 6031 of the fourth drum 603 on the same side, and the insertion rod 703 at the higher end of the counterweight 702 moves out of the insertion hole 6031 of the fourth drum 603 on the same side, so that the fourth drum 603 on the higher side of the adjustment plate 504 is no longer restricted, and the third pull rope 505 connected to the fourth drum 603 is naturally released under the gravity of the drag head hanger, and the side of the drag head hanger pulled up by the lifting mechanism is lowered, and finally the adjustment plate 504 is placed horizontally and the forces on both sides are stable. At this time, the lengths of the third pull ropes 505 on both sides of the adjustment plate 504 are different;

[0068] After the adjustment plate 504 is placed horizontally, the counterweight block 702 in the adjustment plate 504 is reset, and the insertion rods 703 on both sides of the counterweight block 702 are respectively plugged into the insertion holes 6031 of the fourth reel 603 on both sides of the adjustment plate 504. At this time, the positioning groove 804 of the counterweight block 702 is aligned with the positioning block 805, and the positioning block 805 is inserted into the positioning groove 804 under the elastic force of the second elastic element 806, which limits the position of the counterweight block 702 so that the counterweight block 702 will not shake violently during the lifting process, and the rake head hanger can be lifted stably;

[0069] S5: When the staff needs to extend the rake pipe, the staff moves the hoisting rake head bracket away from the rake middle bracket, lifts the extended rake pipe through the hoisting mechanism on another movable horizontal frame 2 on the gantry 1, and places the extended rake pipe between the rake middle bracket and the rake head bracket, so that the rake pipe at the rake head hanger and the rake pipe at the rake middle hanger are connected with the extended rake pipe to complete the adjustment of the rake pipe length;

[0070] When the staff needs to shorten the rake pipe, they disconnect part of the rake pipe between the rake head hanger and the rake middle hanger, then move the hoisting rake head bracket closer to the rake middle bracket, and reconnect the rake pipe between the rake head hanger and the rake middle hanger.

[0071] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for adjusting the length of a rake tube of a trailing suction dredger, comprising a gantry (1) fixed on a deck, characterized in that: Also includes: A movable cross frame (2), wherein the movable cross frame (2) is provided with two groups, the two groups of movable cross frames (2) are slidably arranged with the gantry (1) and are vertically distributed with the gantry (1), and the gantry (1) is provided with a first winch assembly for driving the movable cross frame (2) to move along the length direction of the gantry (1); A movable seat (3), the movable seat (3) being slidably arranged with the movable cross frame (2), and the movable cross frame (2) being provided with a second winch assembly for driving the movable seat (3) to move along the length direction of the movable cross frame (2); and A lifting mechanism, which is arranged on the movable seat (3) and is used for lifting the mud pipe of the drag head; Wherein, the lifting mechanism is provided with a self-balancing component.

2. The device for adjusting the length of a trailing suction dredger according to claim 1, characterized in that: The first winch assembly and the second winch assembly have the same structure. The first winch assembly and the second winch assembly both comprise a support frame (4). The two support frames (4) are respectively connected to the gantry frame (1) and the movable horizontal frame (2). A winding motor (401) is fixedly provided on each support frame (4). The output shaft of the winding motor (401) is connected to a winding rod (402) rotating on the support frame (4). The winding rod (402) is provided with a first drum (403) and a second drum (404). The first drum (403) and the second drum (404) are both wound with a first pull rope (405). The two first pull ropes (405) of the first winch assembly are respectively connected to the movable horizontal frame (2) from two ends of the gantry frame (1). The two first pull ropes (405) of the second winch assembly are respectively connected to the movable seat (3) from two ends of the movable horizontal frame (2).

3. The device for adjusting the length of a trailing suction dredger according to claim 2, characterized in that: The lifting mechanism comprises a lifting motor (5) fixed on a moving seat (3), the output shaft of the lifting motor (5) is connected to a rotating rod (501) rotating on the moving seat (3), a third drum (502) is arranged on the rotating rod (501), a second pull rope (503) is wound around the third drum (502), an end of the second pull rope (503) away from the third drum (502) is connected to an adjusting plate (504), third pull ropes (505) are arranged on both sides of the adjusting plate (504), and a hook (506) is arranged on the end of the third pull rope (505) away from the adjusting plate (504).

4. The device for adjusting the length of a trailing suction dredger according to claim 3, characterized in that: The self-balancing component is arranged on the adjustment plate (504), and comprises a reeling portion (6) for reeling in and releasing the third pull rope (505), a counterweight portion (7) for limiting the operation of the reeling portion (6), and a limiting portion (8) for limiting the lateral movement of the counterweight portion (7).

5. The device for adjusting the length of a trailing suction dredger according to claim 4, characterized in that: The winding portion (6) comprises a rotating rod (601) rotatably connected to the movable seat (3); a torsion spring (602) is arranged between the rotating rod (601) and the adjusting plate (504); the torsion spring (602) is sleeved on the rotating rod (601); a fourth reel (603) is arranged on the rotating rod (601); and the third pull rope (505) is wound around and connected to the fourth reel (603).

6. The device for adjusting the length of a trailing suction dredger according to claim 5, characterized in that: The counterweight portion (7) comprises a working groove (701) provided on the adjustment plate (504), a counterweight block (702) slidably connected in the working groove (701), and an insertion rod (703) fixedly arranged on the side of the counterweight block (702); the fourth reel (603) is provided with insertion holes (6031) matching with the insertion rod (703) evenly arranged in a circumference; the limiting portion (8) comprises movable grooves (801) provided on both sides of the working groove (701), a stopper (802) slidably connected in the movable groove (801), and a first elastic element (803) arranged between the stopper (802) and the inner wall of the movable groove (801); a first inclined surface which is arranged on a side of the stopper (802) away from the first elastic element (803) and is movably opposed to the counterweight block (702) is provided.

7. The device for adjusting the length of a trailing suction dredger according to claim 6, characterized in that: The limiting portion (8) further comprises a positioning groove (804) provided on the upper side of the working groove (701), a positioning block (805) slidably connected in the positioning groove (804), and a second elastic element (806) provided between the positioning block (805) and the inner wall of the positioning groove (804); a positioning hole (7021) cooperating with the positioning block (805) is provided on the top of the counterweight block (702); a movable plug plate (9) is slidably connected in the adjusting plate (504); and a second elastic element (806) is provided on the positioning block (805). A slot (8051) is provided to match the movable plug plate (9); a second inclined surface is provided at one end of the positioning block (805) away from the slot (8051); a groove (8021) is provided on the stopper (802) to movably abut against the second inclined surface; a slider (901) is fixedly provided on the movable plug plate (9); a slide groove (10) is provided on the adjustment plate (504) for the slider (901) to slide; and a third elastic element (1001) is provided between the inner wall of the slide groove (10) and the slider (901).

8. The device for adjusting the length of a trailing suction dredger according to claim 7, characterized in that: The movable plug plates (9) on both sides of the adjustment plate (504) are both provided with rack plates (12), and a driven gear (121) meshing with the two rack plates (12) is rotatably connected inside the adjustment plate (504).

9. The device for adjusting the length of a trailing suction dredger according to claim 8, characterized in that: The positioning block (805) is provided with a fourth pull rope (11), and one end of the fourth pull rope (11) away from the positioning block (805) passes through the adjustment plate (504) and is connected to a pull ring (111).

10. A method for adjusting the length of a trailing suction hopper dredger, using the device for adjusting the length of a trailing suction hopper dredger according to claim 9, characterized in that: The following steps are involved: S1: The staff first disassembles and separates the rake pipe between the rake head hanger and the rake middle hanger, while the rake head hanger and the rake middle hanger are still connected to the hull. The staff then controls the first winch assembly to move one of the movable cross frames (2) on the gantry (1) to the upper side of the rake head hanger, and then controls the second winch assembly to move the movable seat (3) to the upper side of the rake head hanger, and hooks the rake head hanger through the hook (506) at the bottom of the lifting mechanism, and then releases the connection limit between the rake head hanger and the hull, but at this time the support on the hull can still support the rake head hanger; S2: The staff pulls the fourth pull rope (11) through the pull ring (111), and the fourth pull rope (11) applies a pulling force to the positioning block (805) in the positioning slot (804), and the positioning block (805) moves upward from the positioning slot (804) and pushes the movable plug plate (9), and the movable plug plate (9) avoids the positioning block (805). After the slot (8051) and the movable plug plate (9) are aligned, the movable plug plate (9) is reset and inserted into the slot (8051), and the position of the positioning block (805) is limited at this time, and the positioning block (805) no longer limits the counterweight block (702); S3: Then the staff controls the lifting mechanism to work, the lifting motor (5) drives the third drum (502) to rotate at a low speed through the rotating rod (501), the third drum (502) slowly reels the second pull rope (503), and the second pull rope (503) slowly lifts the rake head hanger through the adjustment plate (504), the third pull rope (505) and the hook (506); S4: Due to the irregular shape and structure of the drag head hanger, the center of gravity of the drag head hanger is not at the center position, and then when the drag head hanger is lifted, the third pull rope (505) drives the adjustment plate (504) to tilt, and one end of the drag head hanger where the center of gravity is located is lower than the other end of the drag head hanger; After the adjustment plate (504) is tilted, the internal counterweight block (702) slides in the working groove (701) under the action of its own weight, and the counterweight block (702) applies a thrust to the stopper (802) located at the lower side of the tilt adjustment plate (504). The stopper (802) located at the lower side is forced to move upward into the movable groove (801), and the first elastic element (803) is compressed. The inner wall of the groove (8021) of the stopper (802) no longer exerts pressure on the movable plug plate (901). ), the movable insert plate (9) moves out of the slot (8051) of the positioning block (805), and the movable insert plate (9) on the other side also moves out of the slot (8051) under the meshing of the rack plate (12) and the driven gear (121), and the positioning block (805) in the positioning groove (804) is no longer subjected to force and moves under the elastic force of the second elastic element (806), so that the bottom of the positioning block (805) abuts against the top wall of the counterweight block (702); After the counterweight (702) moves, the insertion rod (703) at the lower end continues to penetrate into the insertion hole (6031) of the fourth drum (603) on the same side, and the insertion rod (703) at the higher end of the counterweight (702) moves out of the insertion hole (6031) of the fourth drum (603) on the same side, so that the fourth drum (603) on the higher side of the adjustment plate (504) is no longer restricted, and the third pull rope (505) connected to the fourth drum (603) is naturally released under the gravity of the drag head hanger, and the side of the drag head hanger pulled up by the lifting mechanism is lowered, and finally the adjustment plate (504) is placed horizontally and the forces on both sides are stable. At this time, the lengths of the third pull ropes (505) on both sides of the adjustment plate (504) are different; After the adjustment plate (504) is placed horizontally, the counterweight (702) in the adjustment plate (504) is reset, and the insertion rods (703) on both sides of the counterweight (702) are respectively plugged into the insertion holes (6031) of the fourth reels (603) on both sides of the adjustment plate (504). At this time, the positioning groove (804) of the counterweight (702) is aligned with the positioning block (805), and the positioning block (805) is inserted into the positioning groove (804) under the elastic force of the second elastic element (806), so as to limit the position of the counterweight (702) so that the counterweight (702) will not shake violently during the lifting process, and the rake head hanger can be lifted stably; S5: When the staff needs to extend the rake pipe, the staff moves the hoisting rake head bracket away from the rake middle bracket, and hoists the extended rake pipe through the hoisting mechanism on another movable horizontal frame (2) on the gantry (1), and places the extended rake pipe between the rake middle bracket and the rake head bracket, so that the rake pipe at the rake head bracket and the rake pipe at the rake middle bracket are connected with the extended rake pipe, and the rake pipe length adjustment is completed; When the staff needs to shorten the rake pipe, they disconnect part of the rake pipe between the rake head hanger and the rake middle hanger, then move the hoisting rake head bracket closer to the rake middle bracket, and reconnect the rake pipe between the rake head hanger and the rake middle hanger.

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