An ultra-large square mud door installation structure, a trailing suction dredger, and a method of using the same

Abstract

The application discloses a super-large square mud door installation structure and a drag suction dredger and a use method thereof, and belongs to the technical field of mud doors. The super-large square mud door installation structure comprises a mounting frame arranged on a main deck on the top of a mud tank, and further comprises a mud door oil cylinder, a sleeve, a supporting piece, a pushing piece and a positioning pin mechanism. The mud door oil cylinder is fixedly arranged on the mounting frame. The top of the sleeve is connected with the mounting frame, and the bottom of the sleeve extends into the mud tank through the main deck. The supporting piece is fixedly arranged on the inclined bottom plate of the mud tank, and the end, away from the inner wall of the mud tank, of the supporting piece is connected with the bottom of the sleeve. The pushing piece is slidably arranged in the sleeve, and the top of the pushing piece is connected with the piston rod of the mud door oil cylinder. The bottom of the pushing piece is movably connected with the mud door body which is hingedly connected with the bottom of the mud tank. The positioning pin mechanism is arranged on the mud door body. The mud door opening and closing and the positioning lock decoupling are simultaneously completed through a single stroke of the oil cylinder. The limitation that a traditional system needs independent oil paths / electric controls is broken, and the mechanical intelligentization of the ship heavy mechanism is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mud door, and particularly relates to a super-large square mud door installation structure, a drag suction dredger and a use method thereof. BACKGROUND

[0002] The drag suction dredger is one of the suction dredgers, which works by sucking mud through the rake head placed on the two sides or the tail of the ship body in the way of sucking mud while sailing. When dredging, the suction pipe is placed on the river bottom, and the mud is sucked into the mud storage of the dredger through the rake head and the suction pipe by the vacuum action of the mud pump. When the mud storage is full, the dredger sails to the mud discharge area to open the mud door to discharge the mud, or directly discharges the dredged soil out of the ship. The mud door is a structure used for discharging mud when the dredger is discharging mud, which is usually arranged at the bottom of the ship cabin and directly discharges the mud when the mud door is opened. The mud door is mainly divided into conical mud door, sliding mud door and square mud door according to its structure. Among them, the square mud door is widely used in various drag suction dredgers due to its large opening angle and large opening area, and high mud discharge efficiency.

[0003] However, in order to solve the problem that the high-pressure oil pump of the mud door oil cylinder hydraulic system keeps high pressure during sailing, the existing technology generally pushes the mud door oil cylinder positioning pin manually or sets a hydraulic cylinder to horizontally push the positioning pin. Since the mud door oil cylinder positioning pin is heavy, it is time-consuming and laborious to manually push the positioning pin, and the labor intensity is high. By additionally setting a hydraulic cylinder to horizontally push the positioning pin, the driving force of the existing mud door oil cylinder cannot be utilized, and the installed hydraulic cylinder horizontally occupies a large space, which causes the space of the mud door oil cylinder and the deck to be cramped, and is not conducive to the work of the workers. SUMMARY

[0004] The present application is proposed to solve the problems in the prior art, and provides a super-large square mud door installation structure, a drag suction dredger and a use method thereof.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] A super-large square mud door installation structure, comprising a mounting frame arranged on the main deck of the mud cabin, further comprising:

[0007] A mud door oil cylinder, which is fixedly arranged on the mounting frame;

[0008] A sleeve, the top of which is connected with the mounting frame, and the bottom of which extends into the mud cabin through the main deck;

[0009] A support, which is fixedly arranged on the inclined bottom plate of the mud cabin, and the end of the support away from the inner wall of the mud cabin is connected with the bottom of the sleeve;

[0010] A pushing member is slidably arranged in the sleeve and has its top end connected with the piston rod of the mud door oil cylinder and its bottom end connected with the mud door body hinged to the bottom of the mud tank;

[0011] A positioning pin mechanism is arranged outside the sleeve and connected with the piston rod of the mud door oil cylinder and is used to release the upward pulling force of the mud door oil cylinder on the pushing member.

[0012] Preferably, the support member comprises an upper elbow plate fixed to the outer wall of the sleeve, a lower elbow plate connected with the inner wall of the bottom of the mud tank and a support rod arranged between the upper elbow plate and the lower elbow plate.

[0013] Preferably, the pushing member comprises a telescopic pipe connected with the piston rod of the mud door oil cylinder, an upward pulling rod arranged at the bottom of the telescopic pipe, two downward pulling rods arranged on both sides of the upward pulling rod through a rotating shaft and connected with the two mud door bodies hinged to the bottom of the mud tank, and the upward pulling rod is slidably connected in the sleeve.

[0014] Preferably, the positioning pin mechanism comprises a mounting plate fixed between the mounting frame and the sleeve, a limiting block slidably connected to the mounting plate and a driving member arranged between the piston rod of the mud door oil cylinder and the limiting block, and the sleeve and the upward pulling rod are both provided with limiting grooves matched with the limiting block.

[0015] Preferably, the driving member comprises a swing rod movably connected with the piston rod of the mud door oil cylinder, a sliding block slidably connected to the mounting plate and rotatably connected with the end of the swing rod away from the piston rod and a first pulling rope arranged between the sliding block and the limiting block.

[0016] Preferably, the mounting plate comprises a fixed plate fixed to the mounting frame and a movable plate rotatably connected to one side of the fixed plate through a pin shaft, and the movable plate is provided with a sliding groove for the sliding block to slide.

[0017] Preferably, the piston rod of the mud door oil cylinder is fixedly provided with a second pulling rope, one end of the second pulling rope away from the piston rod is connected with the side of the limiting block away from the first pulling rope, and the mounting plate is fixedly provided with a stop block movably abutting against the limiting block.

[0018] Preferably, the limiting block comprises a base slidably connected to the mounting plate, a moving seat slidably connected in the cavity of the base, a plurality of lower wedge blocks fixed to the moving seat, an abutting seat connected with the base through a guide rod and an upper wedge block arranged at the lower side of the abutting seat and movably abutting against the lower wedge blocks, the base is slidably connected with the guide rod, and one end of the second pulling rope away from the piston rod is connected with the moving seat.

[0019] Preferably, the bottom of the moving seat is provided with a groove, a positioning block is slidably connected in the groove, an elastic element is arranged between the positioning block and the inner wall of the groove, an extrusion inclined surface is arranged at the bottom of the positioning block, a positioning hole matched with the positioning block is arranged on the inner wall of the base cavity, and the first pull rope is sequentially arranged through the base and the moving seat and connected with the positioning block at the end away from the sliding block.

[0020] A trailing suction dredger comprises a mud tank provided with the super-large square mud door installation structure and a trailing suction dredger body, and the mud tank is arranged in the trailing suction dredger body.

[0021] The application further discloses a use method of the super-large square mud door installation structure.

[0022] S1: mud door opening:

[0023] The piston rod of the mud door oil cylinder is controlled to extend, the telescopic pipe is pushed to move downward, the upper pull rod slides downward in the sleeve, and the two side lower pull rods are driven to separate; the lower pull rod pushes the mud door body to overturn and open, so that a mud unloading gap is formed;

[0024] S2: positioning pin mechanism unlocking (preparation before opening):

[0025] When the piston rod moves downward, the second pull rope is relaxed, the swing rod pushes the sliding block to slide in the sliding groove of the movable plate, the sliding block pulls the positioning block through the first pull rope, the elastic element is compressed to be separated from the positioning hole, the moving seat is unlocked, the lower wedge block is separated from the upper wedge block, the abutting seat moves downward and no longer tightly abuts against the limiting groove, the limiting block is laterally moved as a whole to be separated from the limiting groove, and the constraint on the upper pull rod is released;

[0026] S3: mud door closing:

[0027] The piston rod is retracted, the upper pull rod is pulled to move upward through the telescopic pipe, the lower pull rod is retracted, and the mud door body is closed;

[0028] S4: positioning pin mechanism locking (self-locking after closing):

[0029] The piston rod moves upward to pull the second pull rope, and the moving seat and the base are inserted into the limiting groove; after the base abuts against the stopper, the moving seat continues to slide inward, the lower wedge block lifts the upper wedge block, the abutting seat moves upward to tightly abut against the inner wall of the limiting groove, the positioning block is bounced into the positioning hole under the action of the elastic element, the moving seat is locked, the limiting block and the upper pull rod are kept in the abutting state, and the downward movement of the upper pull rod is limited.

[0030] Compared with the prior art, the application provides a super-large square mud door installation structure, a trailing suction dredger and a use method thereof, and has the following beneficial effects:

[0031] 1. The super-large square mud door installation structure and its use method, by utilizing the stroke of the oil cylinder to drive the positioning pin mechanism, without additional power source, the hydraulic system energy consumption is reduced, the single stroke of the oil cylinder is synchronized to complete the mud door opening and closing and the positioning pin decoupling, breaking through the limitation of traditional system needing independent oil circuit / electronic control, realizing the mechanical intelligence of "one movement and double control" of the ship heavy mechanism, and effectively improving the working efficiency during the mud door opening and closing.

[0032] 2. The super-large square mud door installation structure and its use method, by limiting the upper pull rod when the limiting block is in the vertical state, the movable plate and the fixed plate are in the vertical state, thereby reducing the occupied area of the installation plate, facilitating the maintenance of the main deck, and avoiding the collision and injury of the workers, ensuring the safe working environment of the workers.

[0033] 3. The super-large square mud door installation structure and its use method, by exerting a pulling force on the positioning block by the first pull rope before the limiting block is removed from the limiting position of the upper pull rod, the positioning block moves upward in the groove and moves out of the positioning hole, removing the restriction between the moving seat and the base, as the slider continues to move horizontally, the pulling force of the first pull rope on the positioning block is transmitted to the moving seat, so that the lower wedge on the moving seat is no longer in abutment with the upper wedge of the abutting seat, the moving seat moves horizontally in the base, the abutting seat no longer moves downward under the force, so that the upper side of the abutting seat is no longer in abutment with the inner wall of the limiting groove, reducing the resistance of the subsequent limiting block moving out of the limiting groove; when the limiting block limits the upper pull rod, the lower wedge on the moving seat abuts with the upper wedge on the abutting seat, so that the abutting seat moves upward relative to the base, and the top of the abutting seat abuts with the inner wall of the limiting groove, effectively limiting the upper pull rod, avoiding the downward movement of the upper pull rod, ensuring the sealing between the mud door and the ship body, and preventing the leakage of mud.

[0034] 4. The super-large square mud door installation structure and its use method, by the triangular truss structure (upper elbow plate, lower elbow plate, support rod) of the support member to offset the lateral load of the mud door, ensuring the vertical movement precision of the upper pull rod sliding in the sleeve. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a structure schematic diagram of the mud door closing of the present application;

[0036] Figure 2 It is a structure schematic diagram of the mud door opening of the present application;

[0037] Figure 3 It is a structure schematic diagram of the support member of the present application;

[0038] Figure 4 It is a structure schematic diagram of the installation rack outside of the present application Figure 1 ;

[0039] Figure 5 It is a structure schematic diagram of the installation rack outside of the present applicationFigure 2 ;

[0040] Figure 6 is a part of the present application Figure 5 enlarged structural schematic view of part A;

[0041] Figure 7 is a part of the present application

[0042] Figure 8 is a part of the present application Figure 7 enlarged structural schematic view of part B;

[0043] Figure 9 is a part of the present application

[0044] Figure 10 is a part of the present application

[0045] Figure 11 is a part of the present application

[0046] Figure 12 is a part of the present application Figure 11 enlarged structural schematic view of part C.

[0047] In the figure: 1, mud tank; 2, main deck; 3, mud door oil cylinder; 301, piston rod; 4, sleeve; 5, support; 501, upper elbow plate; 502, lower elbow plate; 503, support rod; 6, pushing piece; 601, telescopic pipe; 602, upper pull rod; 603, lower pull rod; 7, mud door body; 8, mounting frame; 9, mounting plate; 901, fixed plate; 902, movable plate; 9021, sliding groove; 903, stop block; 10, limiting block; 1001, base; 1002, moving seat; 1003, lower wedge block; 1004, guide rod; 1005, abutting seat; 1006, upper wedge block; 11, swing rod; 111, sliding block; 112, first pull rope; 12, second pull rope; 13, limiting groove; 14, recess; 141, positioning block; 142, elastic element; 15, positioning hole; 16, harrow suction ship body. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0049] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" 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 device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0050] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 9 shown, the present embodiment proposes a super-large square mud door installation structure, which comprises a mounting frame 8 arranged on the main deck 2 on the top of the mud tank 1, and further comprises a mud door oil cylinder 3, a sleeve 4, a support 5, a pushing member 6 and a positioning pin mechanism; the mud door oil cylinder 3 is fixedly arranged on the mounting frame 8, the top of the sleeve 4 is connected with the mounting frame 8, and the bottom of the sleeve 4 extends into the mud tank 1 through the main deck 2, the support 5 is fixedly arranged on the inclined bottom plate of the mud tank 1, one end of the support 5 away from the inner wall of the mud tank 1 is connected with the bottom of the sleeve 4, the pushing member 6 slides in the sleeve 4 and the top of the pushing member 6 is connected with the piston rod 301 of the mud door oil cylinder 3, the bottom of the pushing member 6 is movably connected with the mud door body 7 hinged at the bottom of the mud tank 1, and sealing rubbers should be arranged at the abutting position of the two mud door bodies 7 at the bottom of the mud tank 1 and the hinged position of the mud door body 7 and the opening at the bottom of the mud tank 1 to avoid material leakage when the mud door body 7 is closed, which is a prior art and will not be described in detail here, the positioning pin mechanism is arranged outside the sleeve 4 and connected with the piston rod 301 of the mud door oil cylinder 3, and is used to release the upward pulling force of the mud door oil cylinder 3 on the pushing member 6;

[0051] Further, the pushing member 6 comprises an extension pipe 601 connected with the piston rod 301 of the mud door oil cylinder 3, an upward pulling rod 602 arranged at the bottom of the extension pipe 601, and two downward pulling rods 603 rotatably arranged on both sides of the upward pulling rod 602 through a rotating shaft, the upward pulling rod 602 is slidably connected in the sleeve 4, and the two downward pulling rods 603 are rotatably connected with the two mud door bodies 7 at the bottom of the mud tank 1 respectively;

[0052] The mud door oil cylinder 3 is rigidly connected with the mounting frame 8 through flanges, the sleeve 4 penetrates through the main deck 2 and is rigidly fixed with the bottom plate of the mud tank 1 through the triangular truss of the support 5 to form a stable force transmission path against eccentric load; in the opening stage, the oil cylinder piston rod 301 pushes down the telescopic pipe 601, and the positioning pin mechanism is automatically driven to release the limiting of the upper pull rod 602 during the downward movement of the piston rod 301, so that the upper pull rod 602 can move downward, and the lower pull rod 603 pushes the mud door body 7 to overturn to a maximum opening of 45°, and the mud is discharged through the square opening; in the closing stage, the piston rod 301 is retracted to drive the mud door to close, and during this period, the positioning pin mechanism limits the upper pull rod 602, which solves the problem that the high-pressure oil pump of the mud door oil cylinder 3 hydraulic system remains in a high-pressure state during navigation, prevents leakage of the mud door body 7 after closing, replaces the continuous pressure maintaining of the oil cylinder with mechanical locking, effectively reduces the power consumption of the hydraulic system, reduces the occupied area of the deck equipment, synchronously completes the opening and closing of the mud door and the decoupling of the positioning pin with a single stroke of the oil cylinder, breaks through the limitation of the traditional system needing independent oil circuit / electronic control, realizes the mechanical intelligence of the ship heavy mechanism "one movement and double control", and effectively improves the working efficiency during the opening and closing of the mud door.

[0053] As shown in Figure 1 , Figure 2 and Figure 3 , as a preferred embodiment, on the basis of the above mode, further, the support 5 includes an upper elbow plate 501 fixedly connected with the outer wall of the sleeve 4, a lower elbow plate 502 connected with the inner wall of the bottom of the mud tank 1, and a support rod 503 arranged between the upper elbow plate 501 and the lower elbow plate 502; the upper elbow plate 501 is made of high-strength steel plate and is connected with the outer wall of the sleeve 4 through double-face angle welding, the lower elbow plate 502 is rigidly connected with the bottom of the mud tank 1 through bolts, the contact surface is coated with a wear-resistant epoxy resin coating, the support rod 503 is a hollow circular tube, the two ends are provided with a 30° bevel to be welded with the elbow plates, the inside is filled with polyurethane damping material, the triangular truss structure of the support 5 offsets the lateral load of the mud door through the upper elbow plate 501, the lower elbow plate 502 and the support rod 503, and ensures the vertical movement precision of the upper pull rod 602 sliding in the sleeve 4.

[0054] As shown in Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10As shown, as a preferred embodiment, on the basis of the above-mentioned mode, further, the positioning pin mechanism comprises a mounting plate 9 fixed between the mounting frame 8 and the sleeve 4, a limiting block 10 slidingly connected on the mounting plate 9, and a driving member arranged between the piston rod 301 of the mud door oil cylinder 3 and the limiting block 10, and the sleeve 4 and the upper pull rod 602 are each provided with a limiting groove 13 matched with the limiting block 10; the driving member comprises a swing rod 11 movably connected with the piston rod 301 of the mud door oil cylinder 3, a sliding block 111 rotatably connected with the swing rod 11 at an end away from the piston rod 301 and slidingly connected on the mounting plate 9, and a first pull rope 112 arranged between the sliding block 111 and the limiting block 10;

[0055] Further, the mounting plate 9 comprises a fixed plate 901 fixedly connected with the mounting frame 8 and a movable plate 902 rotatably connected with the fixed plate 901 through a pin shaft, and the movable plate 902 is provided with a sliding groove 9021 for sliding of the sliding block 111, the sliding groove 9021 is a T-shaped guide groove structure, and a PTFE wear-resistant bushing is arranged inside, and the cooperation gap between the sliding block 111 and the sliding groove 9021 is controlled to be within 0.1 mm; when the piston rod 301 is extended or retracted, the swing rod 11 drives the sliding block 111 to slide along the sliding groove 9021, and the movable plate 902 is adapted to deflect to eliminate the interference of the mechanism movement;

[0056] The limiting block 10 is a tungsten steel component, and the cooperation gap between the limiting block 10 and the limiting groove 13 is controlled to be within 0.05-0.1 mm; the first pull rope 112 is a steel wire rope, and an abrasion-resistant sleeve is wrapped outside; in the unlocking stage (when the mud door is opened), the piston rod 301 moves downward, and the telescopic pipe 601 is compressed; during this period, the piston rod 301 applies a force to the sliding block 111 through the swing rod 11, so that the sliding block 111 drives the movable plate 902 to overturn, and the movable plate 902 is finally placed horizontally with the fixed plate 901 to provide support for subsequent horizontal movement of the limiting block 10; as the piston rod 301 continues to move downward, the swing rod 11 drives the sliding block 111 to slide on the horizontally placed movable plate 902, and when the sliding block 111 moves, the first pull rope 112 applies a pulling force to the limiting block 10 and makes the limiting block 10 disengage from the limiting groove 13, so as to facilitate subsequent sliding of the upper pull rod 602 in the sleeve 4; the whole process takes ≤0.8 seconds, is synchronized with the action of the oil cylinder, does not require an additional power source, reduces the energy consumption of the hydraulic system, and enables the mud door opening and closing and the positioning pin decoupling to be completed synchronously in a single stroke of the oil cylinder; and when the limiting block 10 limits the upper pull rod 602, the movable plate 902 and the fixed plate 901 are in a vertical state, thereby reducing the occupied area of the mounting plate 9, facilitating maintenance of the main deck 2, avoiding collision and injury of the staff, and ensuring a safe working environment for the staff.

[0057] As shown in the drawings, Figure 5 , Figure 6 , Figure 7 , Figure 10 and Figure 11As shown, as a preferred embodiment, on the basis of the above-mentioned mode, further, the piston rod 301 of the mud door oil cylinder 3 is fixed with the second pull rope 12, one end of the second pull rope 12 away from the piston rod 301 is connected with the side of the limiting block 10 away from the first pull rope 112, and the mounting plate 9 is fixed with the stop block 903 which is in movable abutment with the limiting block 10; the second pull rope 12 is made of stainless steel wire rope, is connected with the piston rod 301 through the quick-release U-shaped clamp, the breaking load is ≥35kN, and the contact surface of the stop block 903 is inlaid with a copper-based wear-resistant sheet; in the linkage unlocking stage, the piston rod 301 is stretched out, the first pull rope 112 pulls the limiting block 10 to be separated from the limiting groove 13, and during this period, the second pull rope 12 is released; in the reset locking stage, the piston rod 301 is retracted, the first pull rope 112 is relaxed, the second pull rope 12 is tensioned, and the limiting block 10 is pulled to be inserted into the limiting groove 13 and positioned against the stop block 903.

[0058] As shown in Figure 7 , Figure 8 , Figure 10 , Figure 11 and Figure 12 shown, as a preferred embodiment, on the basis of the above-mentioned mode, further, the limiting block 10 includes a base 1001 which is in sliding connection with the mounting plate 9, a moving seat 1002 which is in sliding connection in the cavity of the base 1001, a plurality of lower wedge blocks 1003 which are fixed on the moving seat 1002, an abutment seat 1005 which is connected with the base 1001 through a guide rod 1004, and an upper wedge block 1006 which is arranged on the lower side of the abutment seat 1005 and is in movable abutment with the lower wedge block 1003, the base 1001 is in sliding connection with the guide rod 1004, and one end of the second pull rope 12 away from the piston rod 301 is connected with the moving seat 1002;

[0059] Further, the bottom of the moving seat 1002 is provided with a recess 14, a positioning block 141 is in sliding connection in the recess 14, an elastic element 142 is arranged between the positioning block 141 and the inner wall of the recess 14, the bottom of the positioning block 141 is provided with an extrusion inclined surface, the cavity of the base 1001 is provided with a positioning hole 15 matched with the positioning block 141, and one end of the first pull rope 112 away from the sliding block 111 is sequentially connected with the base 1001, the moving seat 1002 and the positioning block 141;

[0060] Working process: when the two mud door bodies 7 are closed, the limiting block 10 is inserted into the limiting groove 13, avoiding the mud door oil cylinder 3 to keep the high pressure state to continuously pull up the pusher 6, when the mud door needs to be opened, the piston rod 301 of the mud door oil cylinder 3 is extended, because the upper pull rod 602 is limited by the limiting block 10, the piston rod 301 will first press down the telescopic pipe 601, the second pull rope 12 is no longer tight, the telescopic pipe 601 is contracted, when the piston rod 301 moves upwards, the swing rod 11 acts on the sliding block 111, the sliding block 111 drives the movable plate 902 to overturn, the movable plate 902 is finally horizontal with the fixed plate 901, providing support for the horizontal movement of the limiting block 10, as the piston rod 301 continues to move downwards, the swing rod 11 drives the sliding block 111 to slide on the horizontally placed movable plate 902, when the sliding block 111 moves, the first pull rope 112 applies force to the positioning block 141, the positioning block 141 moves upwards in the groove 14 and moves out of the positioning hole 15, releasing the restriction between the moving seat 1002 and the base 1001, as the sliding block 111 continues to move horizontally, the pulling force of the first pull rope 112 on the positioning block 141 is transmitted to the moving seat 1002, so that the lower wedge block 1003 on the moving seat 1002 is no longer in abutment with the upper wedge block 1006 of the abutment seat 1005, the moving seat 1002 moves horizontally in the base 1001, the abutment seat 1005 no longer moves downwards under the force, so that the upper side of the abutment seat 1005 is no longer in abutment with the inner wall of the limiting groove 13, reducing the resistance of the subsequent limiting block 10 moving out of the limiting groove 13, the moving seat 1002 drives the base 1001 and the abutment seat 1005 connected with the base 1001 to move towards the movable plate 902, finally the limiting block 10 moves out of the limiting groove 13, as the piston rod 301 continues to move downwards, the piston rod 301 applies force to the upper pull rod 602 through the telescopic pipe 601, the upper pull rod 602 opens the mud door body 7 through the lower pull rod 603.When the mud door body 7 is closed, the piston rod 301 is retracted into the mud door cylinder 3, the piston rod 301 pulls the sliding block 111 through the swing rod 11, the sliding block 111 drives the movable plate 902 to overturn relative to the fixed plate 901, the movable plate 902 pushes the limiting block 10 to move to the limiting groove 13 when overturning, at the same time, the upward movement of the piston rod 301 will exert a pulling force on the moving seat 1002 through the second pull rope 12, the moving seat 1002 drives the base 1001 to move laterally on the mounting plate 9 and is inserted into the limiting groove 13, when the base 1001 abuts against the stop block 903, the moving seat 1002 will slide in the inner cavity of the base 1001 when the moving seat 1002 is continuously pulled by the second pull rope 12, the lower wedge block 1003 on the moving seat 1002 abuts against the upper wedge block 1006 on the abutting seat 1005, the abutting seat 1005 moves upward relative to the base 1001, the top of the abutting seat 1005 abuts against the inner wall of the limiting groove 13, the upward movement of the piston rod 301 is effectively limited, the sealing between the mud door and the ship body is ensured, and the leakage of the mud is prevented, and the positioning block 141 is inserted into the positioning hole 15 at this time, the position of the moving seat 1002 is limited, the abutting state of the abutting seat 1005 and the inner wall of the limiting groove 13 is maintained, and only when the subsequent piston rod 301 moves downward again to control the opening of the mud door body 7, the first pull rope 112 exerts a pulling force on the positioning block 141, the abutting state of the abutting seat 1005 and the inner wall of the limiting groove 13 is released.

[0061] The application further provides a drag suction dredger, which comprises the mud tank 1 provided with the super-large square mud door mounting structure and a drag suction ship body 16, and the mud tank 1 is arranged in the drag suction ship body 16.

[0062] The application further discloses a use method of the super-large square mud door mounting structure, which comprises the following steps.

[0063] S1: Mud door opening:

[0064] The piston rod 301 of the mud door cylinder 3 is controlled to extend, the telescopic pipe 601 is pushed to move downward, the upward pull rod 602 slides downward in the sleeve 4, and the two side downward pull rods 603 are separated; the downward pull rod 603 pushes the mud door body 7 to overturn and open, and a mud unloading gap is formed.

[0065] S2: Positioning pin mechanism unlocking (preparation before opening):

[0066] When the piston rod 301 moves downward, the second pull rope 12 is relaxed, the swing rod 11 pushes the sliding block 111 to slide in the sliding groove 9021 of the movable plate 902, the sliding block 111 pulls the positioning block 141 through the first pull rope 112, the elastic element 142 is compressed to be separated from the positioning hole 15, the moving seat 1002 is unlocked, the lower wedge block 1003 is separated from the upper wedge block 1006, the abutting seat 1005 moves downward and no longer abuts against the limiting groove 13, the limiting block 10 moves laterally to be separated from the limiting groove 13, and the constraint on the upward pull rod 602 is released;

[0067] S3: Mud door closing:

[0068] The piston rod 301 is retracted, pulling the upper pull rod 602 up through the telescopic tube 601, the lower pull rod 603 is retracted, driving the mud door body 7 to close;

[0069] S4: Positioning pin mechanism locking (self-locking after closing):

[0070] The piston rod 301 is pulled up to tighten the second pull rope 12, dragging the moving seat 1002 and the base 1001 to insert into the limiting slot 13; after the base 1001 touches the stop block 903, the moving seat 1002 continues to slide inwards, the lower wedge block 1003 lifts the upper wedge block 1006, making the abutting seat 1005 move up to clamp the inner wall of the limiting slot 13, the positioning block 141 is popped into the positioning hole 15 under the action of the elastic element 142, locking the moving seat 1002, ensuring that the limiting block 10 and the upper pull rod 602 are in the abutting state, limiting the upper pull rod 602 from moving down.

[0071] The drawings in the specification of the present application are only of a schematic nature, and the size and shape of each component shown are not actual limits, but only a schematic representation. In the actual implementation process, each component can be reasonably configured and adjusted according to specific needs and actual conditions.

[0072] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An extra-large square mud door mounting structure, comprising a mounting frame (8) arranged on the main deck (2) at the top of a mud tank (1), characterized in that: Also includes: A mud door oil cylinder (3), wherein the mud door oil cylinder (3) is fixedly mounted on a mounting frame (8); A sleeve (4), the top of the sleeve (4) is connected to the mounting frame (8), and the bottom of the sleeve (4) passes through the main deck (2) and extends into the mud tank (1); A support member (5), wherein the support member (5) is fixed on the inclined bottom plate of the mud tank (1), and one end of the support member (5) away from the inner wall of the mud tank (1) is connected to the bottom of the sleeve (4); A pusher (6), the pusher (6) slides in the sleeve (4) and the top of the pusher (6) is connected to the piston rod (301) of the mud door oil cylinder (3), and the bottom of the pusher (6) is movably connected to the mud door body (7) hinged at the bottom of the mud cabin (1); and a positioning pin mechanism, the positioning pin mechanism being arranged outside the sleeve (4) and connected to the piston rod (301) of the mud door oil cylinder (3) and being used for releasing the upward pulling force of the mud door oil cylinder (3) on the pusher (6); The support member (5) includes an upper toggle plate (501) fixedly connected to the outer wall of the sleeve (4), a lower toggle plate (502) connected to the inner wall of the bottom of the mud chamber (1), and a support rod (503) arranged between the upper toggle plate (501) and the lower toggle plate (502); the pusher (6) includes a telescopic tube (601) connected to the piston rod (301) of the mud gate oil cylinder (3), an upper pull rod (602) arranged at the bottom of the telescopic tube (601), and lower pull rods (603) arranged on both sides of the upper pull rod (602) through a rotating shaft; the upper pull rod (602) is slidably connected to the sleeve (4), and the two lower pull rods (603) are respectively rotatably connected to the two mud gate bodies (7) at the bottom of the mud chamber (1); The positioning pin mechanism includes a mounting plate (9) fixed between the mounting frame (8) and the sleeve (4), a limit block (10) slidably connected to the mounting plate (9), and a driving member arranged between the piston rod (301) of the mud door cylinder (3) and the limit block (10), and the sleeve (4) and the upper pull rod (602) are both provided with a limit groove (13) that matches the limit block (10); The driving member comprises a swing rod (11) movably connected to the piston rod (301) of the mud door cylinder (3), a slider (111) rotatably connected to one end of the swing rod (11) away from the piston rod (301) and slidably connected to the mounting plate (9), and a first pull rope (112) arranged between the slider (111) and the limit block (10).

2. The super-large square mud door installation structure according to claim 1, characterized in that: The mounting plate (9) comprises a fixed plate (901) fixedly connected to the mounting frame (8) and a movable plate (902) rotatably connected to one side of the fixed plate (901) via a pin shaft, wherein a sliding groove (9021) for the sliding block (111) to slide is provided on the movable plate (902).

3. The super-large square mud door installation structure according to claim 2, characterized in that: A second pull rope (12) is fixedly provided on the piston rod (301) of the mud gate oil cylinder (3), and an end of the second pull rope (12) away from the piston rod (301) is connected to a side of the limit block (10) away from the first pull rope (112), and a stop block (903) is fixedly provided on the mounting plate (9) for movably resisting the limit block (10).

4. The super-large square mud door installation structure according to claim 3, characterized in that: The limit block (10) includes a base (1001) slidably connected to the mounting plate (9), a movable base (1002) slidably connected to the cavity of the base (1001), a plurality of lower wedges (1003) fixed on the movable base (1002), an abutting base (1005) connected to the base (1001) through a guide rod (1004), and an upper wedge (1006) arranged on the lower side of the abutting base (1005) and movably abutting against the lower wedges (1003). The base (1001) is slidably connected to the guide rod (1004), and the end of the second pull rope (12) away from the piston rod (301) is connected to the movable base (1002).

5. The super-large square mud door installation structure according to claim 4, characterized in that: A groove (14) is provided at the bottom of the movable seat (1002), a positioning block (141) is slidably connected in the groove (14), an elastic element (142) is provided between the positioning block (141) and the inner wall of the groove (14), an extrusion slope is provided at the bottom of the positioning block (141), a positioning hole (15) matching with the positioning block (141) is provided on the inner wall of the cavity of the base (1001), and the end of the first pull rope (112) away from the slider (111) passes through the base (1001) and the movable seat (1002) in sequence and is connected to the positioning block (141).

6. A trailing suction hopper dredger, comprising a mud compartment (1) provided with an ultra-large square mud door mounting structure according to claim 5, characterized in that: It also includes a trailing suction hopper body (16), wherein the mud chamber (1) is arranged in the trailing suction hopper body (16).

7. A method for using the super-large square mud door installation structure according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1: Mud Gate Opening‌ The piston rod (301) of the mud gate oil cylinder (3) is extended to push the telescopic tube (601) downward, and the upper pull rod (602) slides down in the sleeve (4), driving the lower pull rods (603) on both sides to separate; the lower pull rod (603) pushes the mud gate body (7) to flip open, forming a mud unloading gap; S2: Positioning pin mechanism unlocked: When the piston rod (301) moves downward, the second pull rope (12) relaxes, and the swing rod (11) pushes the slider (111) to slide in the slide groove (9021) of the movable plate (902). The slider (111) pulls the positioning block (141) through the first pull rope (112), compressing the elastic element (142) to disengage it from the positioning hole (15), and the movable seat (1002) is unlocked. The lower wedge block (1003) is separated from the upper wedge block (1006), and the abutment seat (1005) moves downward and is no longer in close contact with the limiting groove (13). The limiting block (10) moves laterally as a whole to disengage from the limiting groove (13), thereby releasing the constraint on the upper pull rod (602); S3: ‌Mud Gate Closed‌: The piston rod (301) contracts, and the upper pull rod (602) is pulled upward through the telescopic tube (601), and the lower pull rod (603) is retracted, driving the mud door body (7) to close; S4: Positioning pin mechanism locking: The piston rod (301) moves upward to tighten the second pull rope (12), dragging the movable seat (1002) and the base (1001) to insert into the limit groove (13); after the base (1001) contacts the blocking block (903), the movable seat (1002) continues to slide inward, the lower wedge block (1003) lifts the upper wedge block (1006), and the abutting seat (1005) moves upward to clamp the inner wall of the limit groove (13), and the positioning block (141) is ejected into the positioning hole (15) under the action of the elastic element (142), locking the movable seat (1002), ensuring that the limit block (10) and the upper pull rod (602) are in abutment state, and limiting the upper pull rod (602) from moving downward.

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