A device and method for adjusting the length of a cutter pipe of a cutter suction dredger

Abstract

The application discloses a rake pipe length adjusting device and method of a rake suction dredger, and belongs to the technical field of dredgers. The rake pipe length adjusting device of the rake suction dredger comprises a portal frame fixed on a deck, and further comprises: two groups of moving cross frames, the two groups of moving cross frames are slidably arranged on the portal frame and are vertically distributed on the portal frame, and a first winch assembly for driving the moving cross frames to move along the length direction of the portal frame is arranged on the portal frame; and a moving seat is slidably arranged on the moving cross frame. The application can completely solve the lengthening and shortening of the rake pipe of the ship by using the self-equipment and personnel of the rake suction ship without the wharf, the deployment, the external hoisting machinery and the manpower support, thereby reducing the construction period and the construction cost. When the rake head support and the rake pipe are lifted, the lifting mechanism is stable in bearing at both ends, the stress of one end is avoided to be too large, and the risk of damage of the equipment when lifting heavy objects is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dredging vessels, in particular to a rake pipe length adjusting device and method of a rake suction dredging vessel. BACKGROUND

[0002] In the process of channel dredging, the channel grade is different, and the dredging depth requirement is also different, so the rake suction vessel needs to change the length of the rake pipe to adapt to different dredging depth requirements. Generally, the length of the rake pipe is changed by disconnecting the suction pipe between the rake head hanger and the rake middle hanger, and then adding or shortening a section of the suction pipe. The high-pressure water pipe, hydraulic pipe, vacuum pipe and sensor cable are also added or shortened synchronously. The rake head hanger and the rake head support rod are correspondingly displaced 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, and the rake suction vessel docks at the nearest dock. The dock crane corresponding to the tonnage of the rake head hanger is used for lifting. The other is to rent a floating crane, and the rake suction vessel finds a wind sheltered anchorage. The floating crane is anchored on one side of the rake suction vessel. The rake head mechanism, rake pipe and rake head hanger are disassembled and then lifted down. However, there are limitations in using the floating crane or the dock crane. It is necessary to find a suitable floating crane, dock crane and dock. The rake pipe lengthening and shortening cannot be realized in time. There are also disadvantages of long construction period and high construction cost. SUMMARY

[0004] The present application aims to solve the problems in the prior art and provides a rake pipe length adjusting device and method of a rake suction dredging vessel.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] A rake pipe length adjusting device of a rake suction dredging vessel, comprising a gantry fixed on a deck, further comprising:

[0007] A movable cross frame, the movable cross frame is provided with two groups, the two groups of movable cross frames are slidingly 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 movable seat, the movable seat is slidingly arranged with the movable cross frame, and the movable cross frame is provided with a second winch assembly for driving the movable seat to move along the length direction of the movable cross frame; and

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

[0010] The lifting mechanism is provided with a self-balancing assembly.

[0011] Preferably, the first winch assembly and the second winch assembly are identical in structure, each of the first winch assembly and the second winch assembly comprises a support frame connected to the portal frame and the moving cross frame respectively, a winding motor is fixedly arranged on each of the support frames, an output shaft of the winding motor is connected with a winding rod rotating on the support frame, a first winding drum and a second winding drum are arranged on the winding rod, the first winding drum and the second winding drum are both wound with a first pull rope, the two first pull ropes of the first winch assembly are connected to the moving cross frame from the two ends of the portal frame respectively, and the two first pull ropes of the second winch assembly are connected to the moving base from the two ends of the moving cross frame respectively.

[0012] Preferably, the hoisting mechanism comprises a hoisting motor fixedly arranged on the moving base, an output shaft of the hoisting motor is connected with a rotating rod rotating on the moving base, a third winding drum is arranged on the rotating rod, the third winding drum is wound with a second pull rope, one end of the second pull rope away from the third winding drum is connected with an adjusting plate, the two sides of the adjusting plate are both provided with a third pull rope, and one end of the third pull rope away from the adjusting plate is provided with a hook.

[0013] Preferably, the self-balancing assembly is arranged on the adjusting plate, the self-balancing assembly comprises a winding part for winding and releasing the third pull rope, a counterweight part for limiting the working of the winding part, and a limiting part for limiting the transverse movement of the counterweight part.

[0014] Preferably, the winding part comprises a rotating rod rotatingly connected to the moving base, a torsional spring is arranged between the rotating rod and the adjusting plate, the torsional spring is sleeved on the rotating rod, a fourth winding drum is arranged on the rotating rod, and the third pull rope is wound on the fourth winding drum.

[0015] Preferably, the counterweight part comprises a working groove opened on the adjusting plate, a counterweight block slidingly connected in the working groove, and a plug rod fixedly arranged on the side of the counterweight block, the fourth winding drum is uniformly provided with plug holes matched with the plug rods in the circumference, and the limiting part comprises movable grooves opened on the two sides of the working groove, a stop block slidingly connected in the movable grooves, and a first elastic element arranged between the stop block and the inner wall of the movable groove, a first inclined surface matched with the counterweight block is opened on the side of the stop block away from the first elastic element.

[0016] Preferably, the limiting part further comprises a positioning groove opened on the upper side of the working groove, a positioning block slidingly connected in the positioning groove, and a second elastic element arranged between the positioning block and the inner wall of the positioning groove; the top of the counterweight block is provided with a positioning hole matched with the positioning block; the adjusting plate is slidingly connected with a movable plug plate; the positioning block is provided with a plug groove matched with the movable plug plate; the end of the positioning block away from the plug groove is provided with a second inclined surface; the stop block is provided with a groove movably abutting against the second inclined surface; the movable plug plate is fixedly provided with a sliding block; the adjusting plate is provided with a sliding groove for the sliding of the sliding block; and the inner wall of the sliding groove and the sliding block are provided with a third elastic element.

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

[0018] Preferably, the positioning block is provided with a fourth pull rope; and the end of the fourth pull rope away from the positioning block penetrates through the adjusting plate and is connected with a pull ring.

[0019] The application further discloses a rake pipe length adjusting method of a rake suction dredger.

[0020] S1: The workers first detach and separate 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 with the ship body; then the workers control the first winch assembly to move one of the moving cross frames on the gantry to the upper side of the rake head hanger; then the workers control the second winch assembly to move the moving seat to the upper side of the rake head hanger; the rake head hanger is hooked by the hooks at the bottom of the hoisting mechanism; then the workers release the connection and limiting of the rake head hanger with the ship body; however, the support on the ship body can still support the rake head hanger.

[0021] S2: The workers pull the fourth pull rope by the pull ring; the fourth pull rope exerts a pulling force on the positioning block in the positioning groove; the positioning block moves upward from the positioning groove and pushes and pushes the movable plug plate; the movable plug plate avoids the positioning block; after the plug groove is aligned with the movable plug plate, the movable plug plate is reset and inserted into the plug groove; the positioning block is positioned at this time; and the positioning block no longer limits the counterweight block.

[0022] S3: Then the workers control the hoisting mechanism to work; the hoisting motor drives the third winding drum to rotate at a low speed; the third winding drum slowly winds the second pull rope; and the second pull rope slowly hoists the rake head hanger through the adjusting plate, the third pull rope and the hook.

[0023] S4: Because the rake head hanger has an irregular outer shape structure, the center of gravity of the rake head hanger is not at the center position; and the adjusting plate is tilted by the third pull rope when the rake head hanger is hoisted; one end where the center of gravity of the rake head hanger is located is lower than the other end of the rake head hanger.

[0024] The counterweight inside the adjusting plate slides in the working groove under the action of its own gravity after the adjusting plate is tilted, the counterweight exerts a pushing force on the stopper placed on the lower side of the adjusting plate, the stopper on the lower side moves up into the movable groove under the force, the first elastic element is compressed, the inner wall of the groove of the stopper no longer abuts against the second inclined surface of the movable plug plate, the movable plug plate moves out of the insertion groove of the positioning block, the movable plug plate on the other side also moves out of the insertion groove under the meshing of the rack plate and the driven gear, the positioning block in the positioning groove is no longer forced 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;

[0025] The insertion rod at the low end moves deeper into the insertion hole of the fourth winding drum on the same side, and the insertion rod at the high end of the counterweight moves out of the insertion hole of the fourth winding drum on the same side, so that the fourth winding drum on the high side of the adjusting plate is no longer limited, the third pull rope connected with the fourth winding drum is naturally released under the gravity of the harrow head hanger, the side of the harrow head hanger pulled up by the lifting mechanism is lowered, and finally the adjusting plate is horizontally placed, and the two sides are stably forced, and the lengths of the third pull ropes on the two sides of the adjusting plate are different at this time.

[0026] After the adjusting plate is horizontally placed, the counterweight in the adjusting plate is reset, and the insertion rods on the two sides of the counterweight are respectively inserted into the insertion holes of the fourth winding drums on the two sides of the adjusting plate, so that the positioning groove of the counterweight is aligned with the positioning block at this time, the positioning block is inserted into the positioning groove under the elastic force of the second elastic element, the position of the counterweight is limited, so that the counterweight does not shake violently during lifting, and the harrow head hanger is stably lifted.

[0027] S5: When the worker needs to lengthen the harrow pipe, the harrow head support in the lifting is away from the harrow middle support, the lengthening harrow pipe is lifted by the lifting mechanism on the other movable cross frame of the gantry frame, and is placed between the harrow middle support and the harrow head support, so that the harrow pipes at the harrow head hanger and the harrow middle hanger are connected with the lengthening harrow pipe, and the length of the harrow pipe is adjusted.

[0028] When the worker needs to shorten the harrow pipe, the part of the harrow pipe between the harrow head hanger and the harrow middle hanger is disconnected, then the harrow head support in the lifting is close to the harrow middle support, and the harrow pipe between the harrow head hanger and the harrow middle hanger is reconnected.

[0029] Compared with the prior art, the present application provides a harrow pipe length adjustment device and method of a harrow suction dredger, which has the following beneficial effects:

[0030] 1. The harrow pipe length adjustment device and method of the harrow suction dredger, by arranging the lifting mechanism on the ship body, without the need for wharf, dispatch, external lifting machinery and manpower support, the whole work of lengthening and shortening the harrow pipe of the ship can be completely solved by using the equipment and personnel of the harrow suction ship, thereby reducing the construction period and construction cost.

[0031] 2. The rake pipe length adjusting device and method of the rake suction dredger, by setting the self-balancing assembly on the lifting mechanism, when lifting the rake head support and the rake pipe, the lifting mechanism both ends are stable, avoiding one end force too large, and further reducing the risk of damage when lifting heavy equipment. BRIEF DESCRIPTION OF DRAWINGS

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

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

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

[0035] Figure 4 It is a Figure 3 A partial enlarged structural schematic diagram of the application;

[0036] Figure 5 It is a Figure 3 A partial enlarged structural schematic diagram of the application;

[0037] Figure 6 It is a structural schematic diagram of the fourth drum of the application;

[0038] Figure 7 It is a cross-sectional structural schematic diagram of the stop block of the application;

[0039] Figure 8 It is a structural schematic diagram of the driven gear on both sides of the application.

[0040] In the figure: 1, gantry; 2, moving cross; 3, moving 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, torsional spring; 603, fourth drum; 6031, jack; 7, counterweight part; 701, working groove; 702, counterweight block; 7021, positioning hole; 703, insertion rod; 8, limiting part; 801, movable groove; 802, stop block; 8021, groove; 803, first elastic element; 804, positioning groove; 805, positioning block; 8051, insertion slot; 806, second elastic element; 9, movable insertion plate; 901, sliding block; 10, sliding groove; 1001, third elastic element; 11, fourth pull rope; 111, pull ring; 12, rack plate; 121, driven gear. DETAILED DESCRIPTION

[0041] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described; obviously, the described embodiments are only a part of the embodiments of the present application, and not all the embodiments of the present application; based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present application.

[0042] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected" can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, can be internal communication of two elements; for a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] Embodiment: Reference Figures 1-3 A rake pipe length adjusting device of a rake dredger, comprising a gantry 1 fixed on a deck, further comprising:

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

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

[0047] A hoisting mechanism, the hoisting mechanism is arranged on the moving seat 3 and is used for hoisting a rake head mud pipe;

[0048] Among them, the hoisting mechanism is provided with a self-balancing assembly.

[0049] Specifically, when the staff adjusts the rake pipe length, the rake head support and the rake pipe between the rake head support and the rake middle support are first disassembled, when the rake pipe needs to be lengthened, the lifting mechanism on the two movable cross frames 2 respectively lifts the rake head support and the lengthened rake pipe, the rake head support is away from the rake middle support, and the lengthened rake pipe is placed between the rake head support and the rake pipe of the rake middle support, when the rake pipe needs to be shortened, only the lifting mechanism on one of the two movable cross frames 2 lifts the rake head support to the rake middle support, and then the rake pipes are connected, so that the length of the rake pipe is adjusted, without the wharf, the dispatch, the external lifting machinery and the manpower support, the whole work of lengthening and shortening the rake pipe of the rake suction ship can be completely solved by the ship itself equipment and personnel, the construction period and the construction cost are reduced, and when the rake head support and the rake pipe are lifted, the lifting mechanism is balanced by the self-balancing assembly, so that the load on both ends is stable, the stress on one end is avoided, and the risk of damage of the equipment when lifting heavy objects is reduced.

[0050] With reference to Figures 1-3 , as a preferred technical scheme of the present application, the first winch assembly and the second winch assembly are the same structure, the first winch assembly and the second winch assembly each include a support frame 4, two support frames 4 are respectively connected with the gantry 1 and the movable cross frame 2, a winding motor 401 is fixedly arranged on each support frame 4, the output shaft of the winding motor 401 is connected with a winding rod 402 rotating on the support frame 4, a first winding drum 403 and a second winding drum 404 are arranged on the winding rod 402, and a first pull rope 405 is wound and connected on the first winding drum 403 and the second winding drum 404, the two first pull ropes 405 of the first winch assembly are respectively connected with the movable cross frame 2 from the two ends of the gantry 1, and the two first pull ropes 405 of the second winch assembly are respectively connected with the movable seat 3 from the two ends of the movable cross frame 2.

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

[0052] With reference to Figures 1-3, as a preferred technical scheme of the present application, the lifting mechanism includes a lifting motor 5 fixed on the moving seat 3, the output shaft of the lifting motor 5 is connected with a rotating rod 501 rotating on the moving seat 3, the rotating rod 501 is provided with a third drum 502, the third drum 502 is wound with a second pull rope 503, one end of the second pull rope 503 away from the third drum 502 is connected with an adjusting plate 504, both sides of the adjusting plate 504 are provided with a third pull rope 505, one end of the third pull rope 505 away from the adjusting plate 504 is provided with a hook 506.

[0053] Specifically, when the lifting mechanism works, the lifting motor 5 is controlled to run, 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, the adjusting plate 504 connected at the bottom end of the second pull rope 503 is lowered, and then the hook 506 connected to the lower side of the adjusting plate 504 through the third pull rope 505 is lowered, so that the rake head support is conveniently hooked and lifted.

[0054] Referring to Figures 1-8 , as a preferred technical scheme of the present application, the self-balancing assembly is arranged on the adjusting plate 504, the self-balancing assembly includes a winding part 6 for winding and releasing the third pull rope 505, a counterweight part 7 for limiting the work of the winding part 6, and a limiting part 8 for limiting the transverse movement of the counterweight part 7.

[0055] Further, the winding part 6 includes a rotating rod 601 rotatingly connected to the moving 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, the rotating rod 601 is provided with a fourth drum 603, and the third pull rope 505 is wound on the fourth drum 603.

[0056] Further, the counterweight part 7 includes a working groove 701 opened in the adjusting plate 504, a counterweight block 702 slidingly connected in the working groove 701, and a plug rod 703 fixed on the side of the counterweight block 702, the fourth drum 603 is uniformly provided with plug holes 6031 matched with the plug rod 703 in the circumference, the limiting part 8 includes movable grooves 801 opened on both sides of the working groove 701, a stop block 802 slidingly connected in the movable groove 801, and a first elastic element 803 arranged between the stop block 802 and the inner wall of the movable groove 801, a first inclined surface matched with the counterweight block 702 is opened on the side of the stop block 802 away from the first elastic element 803.

[0057] Further, the limiting part 8 further comprises a positioning groove 804 formed 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, the top of the counterweight block 702 is provided with a positioning hole 7021 matched with the positioning block 805, the adjusting plate 504 is slidably connected with a movable plug plate 9, the positioning block 805 is provided with a plug groove 8051 matched with the movable plug plate 9, and the end of the positioning block 805 away from the plug groove 8051 is provided with a second inclined surface, the stop block 802 is provided with a groove 8021 movably abutting against the second inclined surface, the movable plug plate 9 is fixedly provided with a sliding block 901, and the adjusting plate 504 is provided with a sliding groove 10 for the sliding block 901 to slide, and the inner wall of the sliding groove 10 and the sliding block 901 are provided with a third elastic element 1001.

[0058] Further, the movable plug plate 9 on both sides of the adjusting plate 504 is provided with a rack plate 12, and the adjusting plate 504 is rotatably connected with a driven gear 121 engaged with the two rack plates 12.

[0059] Further, the positioning block 805 is provided with a fourth pull rope 11, and the end of the fourth pull rope 11 away from the positioning block 805 penetrates through the adjusting plate 504 and is connected with a pull ring 111.

[0060] Specifically, the staff controls the lifting mechanism to work, the lifting motor 5 drives the third drum 502 to rotate slowly through the rotating rod 501, the third drum 502 slowly winds the second pull rope 503, the second pull rope 503 slowly lifts the harrow head hanger through the adjusting plate 504, the third pull rope 505 and the hook 506; because the shape of the harrow head hanger is irregular, the center of gravity of the harrow head hanger is not at the center position, and then the adjusting plate 504 is tilted through the third pull rope 505 when the harrow head hanger is lifted, one end where the center of gravity of the harrow head hanger is located is lower than the other end of the harrow head hanger; after the adjusting plate 504 is tilted, the counterweight block 702 in the adjusting plate 504 slides in the working groove 701 under the action of its own gravity, the counterweight block 702 exerts a pushing force on the stop block 802 located on the lower side of the tilted adjusting plate 504, the stop block 802 located on the lower side moves up into the movable groove 801 under the force, the first elastic element 803 is compressed, the inner wall of the groove 8021 of the stop block 802 no longer abuts against the second inclined surface of the movable insert plate 9, the movable insert plate 9 moves out of the insertion slot 8051 of the positioning block 805, and the movable insert plate 9 on the other side also moves out of the insertion 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 forced 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 block 702 moves, the insertion rod 703 at the low end further penetrates into the insertion hole 6031 of the fourth drum 603 on the same side, and the insertion rod 703 at the high end of the counterweight block 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 adjusting plate 504 is no longer limited, and the third pull rope 505 connected with the fourth drum 603 is naturally released under the gravity of the harrow head hanger, the side of the harrow head hanger lifted by the lifting mechanism is lowered, and finally the adjusting plate 504 is horizontally placed, and the two sides are stably forced, and at this time, the lengths of the third pull ropes 505 on the two sides of the adjusting plate 504 are different; after the adjusting plate 504 is horizontally placed, the counterweight block 702 in the adjusting plate 504 is reset, the insertion rods 703 on the two sides of the counterweight block 702 are respectively inserted into the insertion holes 6031 of the fourth drums 603 on the two sides of the adjusting plate 504, at this time, the positioning groove 804 of the counterweight block 702 is aligned with the positioning block 805, the positioning block 805 is inserted into the positioning groove 804 under the elastic force of the second elastic element 806, the position of the counterweight block 702 is limited, so that the counterweight block 702 does not shake violently during lifting, the harrow head hanger is stably lifted, the load on both ends of the lifting mechanism is stable, the force on one end is avoided to be too large, the pull rope and the lifting mechanism are avoided to bear too much load, and the risk of damage of the equipment when lifting heavy objects is reduced.

[0061] The application further discloses a harrow pipe length adjusting method of the rake suction dredger.

[0062] S1: The worker first disassembles the harrow pipe between the harrow head hanger and the harrow middle hanger, at this time the harrow head hanger and the harrow middle hanger are still connected with the ship body, then the worker controls the first winch assembly to make one of the moving cross frames 2 on the gantry 1 move to the upper side of the harrow head hanger, then controls the second winch assembly to make the moving seat 3 move to the upper side of the harrow head hanger, hooks the harrow head hanger through the hook 506 at the bottom of the lifting mechanism, and then releases the connection of the harrow head hanger with the ship body, but at this time the support on the ship body can still support the harrow head hanger;

[0063] S2: The worker pulls the fourth pull rope 11 through the pull ring 111, the fourth pull rope 11 exerts a pulling force on the positioning block 805 in the positioning groove 804, the positioning block 805 moves upward in the positioning groove 804 and pushes the movable insertion plate 9, the movable insertion plate 9 avoids the positioning block 805, after the insertion groove 8051 is aligned with the movable insertion plate 9, the movable insertion plate 9 resets and inserts into the insertion groove 8051, and the positioning block 805 is positioned at this time, and the positioning block 805 no longer positions the counterweight block 702;

[0064] S3: Then the worker controls the lifting mechanism to work, the lifting motor 5 drives the third drum 502 to rotate slowly through the rotating rod 501, the third drum 502 slowly winds the second pull rope 503, and the second pull rope 503 slowly lifts the harrow head hanger through the adjusting plate 504, the third pull rope 505 and the hook 506;

[0065] S4: Because the shape of the harrow head hanger is irregular, the center of gravity of the harrow head hanger is not at the center position, and then the adjusting plate 504 is tilted through the third pull rope 505 when the harrow head hanger is lifted, and one end where the center of gravity of the harrow head hanger is located is lower than the other end of the harrow head hanger;

[0066] After the adjusting plate 504 is tilted, the counterweight block 702 inside slides in the working groove 701 under the action of its own gravity, the counterweight block 702 exerts a pushing force on the stop block 802 positioned on the lower side of the tilted adjusting plate 504 at this time, the stop block 802 on the lower side moves upward into the movable groove 801 under the force, the first elastic element 803 is compressed, the inner wall of the groove 8021 of the stop block 802 no longer abuts against the second inclined surface of the movable insertion plate 9, the movable insertion plate 9 moves out of the insertion groove 8051 of the positioning block 805, the movable insertion plate 9 on the other side also moves out of the insertion groove 8051 under the meshing of the rack plate 12 and the driven gear 121, and the positioning block 805 in the positioning groove 804 no longer bears the force and moves under the elastic pushing 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] The insertion rod 703 at the low end of the weight block 702 moves further into the insertion hole 6031 of the fourth winding drum 603 on the same side, and the insertion rod 703 at the high end of the weight block 702 moves out of the insertion hole 6031 of the fourth winding drum 603 on the same side, so that the fourth winding drum 603 on the high side of the adjusting plate 504 is no longer limited, the third pull rope 505 connected with the fourth winding drum 603 is naturally released under the gravity of the harrow head hanger, the side of the harrow head hanger pulled up by the lifting mechanism is lowered, and finally the adjusting plate 504 is horizontally placed, and the two sides are stably stressed, and at this time, the lengths of the third pull ropes 505 on the two sides of the adjusting plate 504 are different.

[0068] After the adjusting plate 504 is horizontally placed, the weight block 702 in the adjusting plate 504 is reset, the insertion rods 703 on the two sides of the weight block 702 are respectively inserted into the insertion holes 6031 of the fourth winding drums 603 on the two sides of the adjusting plate 504, at this time, the positioning groove 804 of the weight block 702 is aligned with the positioning block 805, the positioning block 805 is inserted into the positioning groove 804 under the elastic pushing of the second elastic element 806, the position of the weight block 702 is limited, so that the weight block 702 does not shake violently during lifting, and the harrow head hanger is stably lifted.

[0069] S5: When the staff needs to lengthen the harrow pipe, the harrow head support in the lifting is away from the harrow middle support, the lengthened harrow pipe is lifted by the lifting mechanism on the other moving cross beam 2 of the gantry 1, and the lengthened harrow pipe is placed between the harrow middle support and the harrow head support, so that the harrow pipe at the harrow head hanger and the harrow pipe of the harrow middle hanger are connected with the lengthened harrow pipe, and the length adjustment of the harrow pipe is completed.

[0070] When the staff needs to shorten the harrow pipe, the staff disconnects part of the harrow pipe between the harrow head hanger and the harrow middle hanger, then the harrow head support in the lifting is close to the harrow middle support, and the harrow pipe between the harrow head hanger and the harrow middle hanger is reconnected.

[0071] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, and all of them should be covered in the protection scope of the present application.

Claims

1. A device for adjusting the length of a cutter pipe of a cutter suction dredger, comprising a gantry (1) which is fixed to a deck, characterized in that, Also include: The mobile cross (2) is provided with two groups, two groups of mobile cross (2) and gantry (1) slidingly arranged and vertically distributed with gantry (1), the gantry (1) is provided with a first winch assembly for driving the mobile cross (2) to move along the length direction of the gantry (1); The mobile seat (3) is slidingly arranged with the mobile cross (2), and the mobile cross (2) is provided with a second winch assembly for driving the mobile seat (3) to move along the length direction of the mobile cross (2); and The lifting mechanism is arranged on the mobile seat (3) and used for lifting the rake pipe; Wherein, the lifting mechanism is provided with a self-balancing assembly; The lifting mechanism includes a lifting motor (5) fixed on the mobile seat (3), the output shaft of the lifting motor (5) is connected with a rotating rod (501) rotating on the mobile seat (3), the rotating rod (501) is provided with a third drum (502), the third drum (502) is wound with a second pull rope (503), one end of the second pull rope (503) away from the third drum (502) is connected with an adjusting plate (504), the both sides of the adjusting plate (504) are provided with a third pull rope (505), one end of the third pull rope (505) away from the adjusting plate (504) is provided with a hook (506); The self-balancing assembly is arranged on the adjusting plate (504), and the self-balancing assembly includes a winding part (6) for winding and releasing the third pull rope (505), a counterweight part (7) for limiting the working of the winding part (6), and a limiting part (8) for limiting the transverse movement of the counterweight part (7); The winding part (6) includes a rotating rod (601) rotatingly connected to the mobile seat (3), a torsional spring (602) is arranged between the rotating rod (601) and the adjusting plate (504), the torsional spring (602) is sleeved on the rotating rod (601), a fourth drum (603) is arranged on the rotating rod (601), and the third pull rope (505) is wound on the fourth drum (603); The counterweight part (7) includes a working groove (701) opened in the adjusting plate (504), a counterweight block (702) slidingly connected in the working groove (701), and a plug rod (703) fixed on the side of the counterweight block (702), the fourth drum (603) is circumferentially and uniformly provided with a plug hole (6031) matched with the plug rod (703), the limiting part (8) includes a movable groove (801) opened on both sides of the working groove (701), a stop block (802) slidingly connected in the movable groove (801), and a first elastic element (803) arranged between the stop block (802) and the inner wall of the movable groove (801), and a first inclined surface is opened on the side of the stop block (802) away from the first elastic element (803) and is in movable abutment with the counterweight block (702).

2. A device for adjusting the length of a cutter pipe of a cutter suction dredger according to claim 1, characterized in that The first winch assembly and the second winch assembly are identical in structure, each of the first winch assembly and the second winch assembly comprises a support frame (4) connected with the portal frame (1) and the movable cross frame (2) respectively, a winding motor (401) is fixed on each of the support frames (4), an output shaft of the winding motor (401) is connected with a winding rod (402) rotating on the support frame (4), a first winding drum (403) and a second winding drum (404) are arranged on the winding rod (402), the first winding drum (403) and the second winding drum (404) are both wound with a first pull rope (405), the two first pull ropes (405) of the first winch assembly are connected with the movable cross frame (2) from the two ends of the portal frame (1) respectively, and the two first pull ropes (405) of the second winch assembly are connected with the movable base (3) from the two ends of the movable cross frame (2) respectively.

3. A device for adjusting the length of a cutter pipe of a cutter suction dredger according to claim 2, characterized in that The limiting part (8) further comprises a positioning groove (804) formed on the upper side of the working groove (701), a positioning block (805) slidingly 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), the top of the counterweight block (702) is provided with a positioning hole (7021) matched with the positioning block (805), the adjusting plate (504) is slidingly connected with a movable insertion plate (9), the positioning block (805) is provided with an insertion groove (8051) matched with the movable insertion plate (9), one end of the positioning block (805) away from the insertion groove (8051) is provided with a second inclined surface, the stop block (802) is provided with a groove (8021) movably abutting against the second inclined surface, the movable insertion plate (9) is fixed with a sliding block (901), and the adjusting plate (504) is provided with a sliding groove (10) for the sliding block (901) to slide, and a third elastic element (1001) is arranged between the inner wall of the sliding groove (10) and the sliding block (901).

4. A device for adjusting the length of a cutter pipe of a cutter suction dredger according to claim 3, characterized in that The movable insertion plate (9) on the two sides of the adjusting plate (504) is provided with a rack plate (12), and the adjusting plate (504) is rotatably connected with a driven gear (121) engaged with the two rack plates (12).

5. A device for adjusting the length of a cutter pipe of a cutter suction dredger according to claim 4, characterized in that The positioning block (805) is provided with a fourth pull rope (11), one end of the fourth pull rope (11) away from the positioning block (805) penetrates through the adjusting plate (504) and is connected with a pull ring (111).

6. A method for adjusting the length of the rake pipe of a trailing suction hopper dredger, using the device for adjusting the length of the rake pipe of a trailing suction hopper dredger according to claim 5, characterized in that, The method comprises the following steps: S1: the staff first dismounts and separates the harrow pipe between the harrow head hanger and the harrow middle hanger, at this time the harrow head hanger and the harrow middle hanger are still connected with the ship body, then the staff controls the first winch assembly to move one of the movable cross frames (2) on the portal frame (1) to the upper side of the harrow head hanger, then controls the second winch assembly to move the movable base (3) to the upper side of the harrow head hanger, hooks the harrow head hanger through the hook (506) at the bottom of the hoisting mechanism, then releases the connection and limiting of the harrow head hanger with the ship body, but at this time the support on the ship body can still support the harrow head hanger; S2: The worker pulls the fourth pull rope (11) through the pull ring (111), the fourth pull rope (11) exerts a pulling force on the positioning block (805) in the positioning groove (804), the positioning block (805) moves upward in the positioning groove (804) and pushes the movable insertion plate (9), the movable insertion plate (9) avoids the positioning block (805), after the insertion slot (8051) is aligned with the movable insertion plate (9), the movable insertion plate (9) resets and is inserted into the insertion slot (8051), the positioning block (805) is now position-limited, and the positioning block (805) no longer limits the counterweight block (702); S3: Then the worker controls the lifting mechanism to work, the lifting motor (5) drives the third winding drum (502) to rotate slowly through the rotating rod (501), the third winding drum (502) slowly winds the second pull rope (503), the second pull rope (503) slowly lifts the harrow head hanger through the adjusting plate (504), the third pull rope (505) and the hook (506); S4: Because the shape of the harrow head hanger is irregular, the center of gravity of the harrow head hanger is not at the center position, and then the adjusting plate (504) is tilted through the third pull rope (505) when the harrow head hanger is lifted, one end where the center of gravity of the harrow head hanger is located is lower than the other end of the harrow head hanger; After the adjusting plate (504) is tilted, the counterweight block (702) in the adjusting plate (504) slides in the working groove (701) under the action of its own gravity, the counterweight block (702) exerts a pushing force on the stop block (802) located on the lower side of the tilted adjusting plate (504), the stop block (802) on the lower side moves upward into the movable groove (801) under the action of the force, the first elastic element (803) is compressed, the inner wall of the groove (8021) of the stop block (802) no longer abuts against the second inclined surface of the movable insertion plate (9), the movable insertion plate (9) moves out of the insertion slot (8051) of the positioning block (805), the movable insertion plate (9) on the other side also moves out of the insertion 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 forced 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 block (702) moves, the insertion rod (703) at the low end of the counterweight block (702) continues to penetrate into the insertion hole (6031) of the fourth winding drum (603) on the same side, the insertion rod (703) at the high end of the counterweight block (702) moves out of the insertion hole (6031) of the fourth winding drum (603) on the same side, so that the fourth winding drum (603) on the high side of the adjusting plate (504) is no longer limited, the third pull rope (505) connected with the fourth winding drum (603) is naturally released under the gravity of the harrow head hanger, the side of the harrow head hanger lifted by the lifting mechanism is lowered, and finally the adjusting plate (504) is horizontally placed and stably stressed on both sides, at this time, the lengths of the third pull ropes (505) on both sides of the adjusting plate (504) are different; After the adjusting plate (504) is placed horizontally, the counterweight (702) in the adjusting plate (504) is reset, the insertion rods (703) on both sides of the counterweight (702) are respectively inserted into the insertion holes (6031) of the fourth winding drums (603) on both sides of the adjusting plate (504), at this time, the positioning groove (804) of the counterweight (702) is aligned with the positioning block (805), the positioning block (805) is inserted into the positioning groove (804) under the elastic pushing of the second elastic element (806), the position of the counterweight (702) is limited, so that the counterweight (702) does not shake violently during hoisting, and the rake head hanger is stably hoisted; S5: When the staff needs to lengthen the rake pipe, the rake head support in the hoisting is away from the rake middle support, the lengthened rake pipe is hoisted by the hoisting mechanism on the other movable cross frame (2) of the gantry (1), and is placed between the rake middle support and the rake head support, so that the rake pipe at the rake head hanger and the rake pipe at the rake middle hanger are connected with the lengthened rake pipe, and the length adjustment of the rake pipe is completed; When the staff needs to shorten the rake pipe, the staff disconnects part of the rake pipe between the rake head hanger and the rake middle hanger, then makes the rake head support in the hoisting close to the rake middle support, and reconnects the rake pipe between the rake head hanger and the rake middle hanger.

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