Ultra-large square mud door mounting structure, trailing suction hopper dredger and using method of trailing suction hopper dredger

Abstract

The invention discloses an ultra-large square mud door mounting structure, a trailing suction hopper dredger and a using method of the trailing suction hopper dredger, and belongs to the technical field of mud doors. An ultra-large square mud door installation structure comprises an installation frame arranged on a main deck on the top of a mud cabin, and further comprises a mud door oil cylinder fixedly arranged on the installation frame. The top of the sleeve is connected with the mounting frame, and the bottom of the sleeve penetrates through the main deck and extends into the mud cabin; the supporting piece is fixedly arranged on an inclined bottom plate of the mud cabin, and the end, away from the inner wall of the mud cabin, of the supporting piece is connected with the bottom of the sleeve; the pushing piece slides in the sleeve, the top of the pushing piece is connected with a piston rod of the mud door oil cylinder, and the bottom of the pushing piece is movably connected with a mud door body hinged to the bottom of the mud cabin; and a positioning pin mechanism. Opening and closing of the mud door and decoupling of the positioning lock are synchronously completed through the single stroke of the oil cylinder, the limitation that a traditional system needs an independent oil way / electric control is broken through, and mechanical intellectualization of'one-action double-control 'of a ship heavy mechanism is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of sluice gates, and particularly to an installation structure of an extra-large square sluice gate, a trailing suction hopper dredger, and a using method thereof. Background Art

[0002] A trailing suction hopper dredger is a type of suction dredger. It sucks mud through a drag head placed on both sides or at the tail of the hull and works in a way of sucking mud while sailing. When dredging, the drag suction pipe is lowered to the river bottom, and by the vacuum action of the mud pump, mud is sucked from the river bottom through the drag head and the suction pipe into the mud bunker of the dredger. After the mud bunker is full, the drag head is lifted and the ship sails to the dumping area to open the sluice gate to discharge the mud, or directly discharge the dug soil outside the ship. The sluice gate is a structure used for discharging mud on a dredger, usually installed at the bottom of the cabin and directly discharging the mud material when the sluice gate is opened. According to its structural form, the sluice gate is mainly divided into a conical sluice gate, a translational sluice gate, and a square sluice gate. Among them, the square sluice gate is widely used in various trailing suction hopper dredgers due to its large opening angle and opening area and high mud discharging efficiency.

[0003] However, in the prior art, in order to solve the problem that the high-pressure oil pump of the sluice gate oil cylinder hydraulic system maintains a high-pressure state during navigation, generally, the positioning pin of the sluice gate oil cylinder is manually pushed or a hydraulic cylinder is horizontally arranged at the pin hole to push the positioning pin. Since the positioning pin of the sluice gate oil cylinder is heavy, it is time-consuming and laborious to manually push the positioning pin, and the labor intensity is high; while by additionally arranging a hydraulic cylinder to horizontally push the positioning pin, the driving force of the existing sluice gate oil cylinder cannot be utilized, and the horizontally occupied space of the installed hydraulic cylinder is large, resulting in a cramped space at the sluice gate oil cylinder and the deck, which is not conducive to the staff to carry out other operations. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art, and to propose an installation structure of an extra-large square sluice gate, a trailing suction hopper dredger, and a using method thereof.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions: An installation structure of an extra-large square sluice gate, including an installation frame arranged on the main deck at the top of the mud bunker, further including: A sluice gate oil cylinder, which is fixedly arranged on the installation frame; A sleeve, the top of which is connected to the installation frame, and the bottom of which passes through the main deck and extends into the mud bunker; A support member, which is fixedly arranged on the inclined bottom plate of the mud bunker, and one end of the support member far from the inner wall of the mud bunker is connected to the bottom of the sleeve; A pushing member, which slides in the sleeve and the top of which is connected to the piston rod of the sluice gate oil cylinder, and the bottom of the pushing member is movably connected to the sluice gate body hinged to the bottom of the mud bunker; and a positioning pin mechanism which is arranged outside the sleeve and connected to the piston rod of the sluice door oil cylinder, and is used to release the upward pulling force of the sluice door oil cylinder on the pushing member.

[0006] Preferably, the supporting member includes an upper elbow plate fixedly connected to the outer wall of the sleeve, a lower elbow plate connected to the inner wall of the bottom of the mud tank, and a supporting rod arranged between the upper elbow plate and the lower elbow plate.

[0007] Preferably, the pushing member includes a telescopic tube connected to the piston rod of the sluice door oil cylinder, an upper pull rod arranged at the bottom of the telescopic tube, and lower pull rods rotatably arranged on both sides of the upper pull rod through a rotating shaft. The upper pull rod is slidably connected in the sleeve, and the two lower pull rods are respectively rotatably connected to two sluice door bodies at the bottom of the mud tank.

[0008] Preferably, the positioning pin mechanism includes a mounting plate fixedly arranged 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 sluice door oil cylinder and the limiting block. Limiting grooves are provided on both the sleeve and the upper pull rod and are matched with the limiting block.

[0009] Preferably, the driving member includes a swing rod movably connected to the piston rod of the sluice door oil cylinder, a slider rotatably connected to the end of the swing rod far from the piston rod and slidably connected to the mounting plate, and a first pulling rope arranged between the slider and the limiting block.

[0010] Preferably, the mounting plate includes a fixed plate fixedly connected to the mounting frame and a movable plate rotatably connected to one side of the fixed plate through a pin shaft. A sliding groove for the slider to slide is provided on the movable plate.

[0011] Preferably, a second pulling rope is fixedly arranged on the piston rod of the sluice door oil cylinder. The end of the second pulling rope far from the piston rod is connected to the side of the limiting block far from the first pulling rope, and a stop block which is movably abutted against the limiting block is fixedly arranged on the mounting plate.

[0012] Preferably, the limiting block includes 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 fixedly arranged on the moving seat, a contact seat connected to the base through a guide rod, and an upper wedge block arranged on the lower side of the contact seat and movably abutted against the lower wedge blocks. The base is slidably connected to the guide rod, and the end of the second pulling rope far from the piston rod is connected to the moving seat.

[0013] Preferably, a groove is provided at the bottom of the moving seat. 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 provided at the bottom of the positioning block. A positioning hole matched with the positioning block is provided on the inner wall of the cavity of the base. The end of the first pulling rope far from the slider passes through the base and the moving seat in sequence and is connected to the positioning block.

[0014] A trailing suction hopper dredger comprises a mud chamber provided with the aforementioned super-large square mud door mounting structure, and a trailing suction hopper dredger body, wherein the mud chamber is arranged in the trailing suction hopper dredger body.

[0015] The present invention also discloses a method for using the super-large square mud door installation structure, comprising the following steps: S1: Mud Gate Opening‌ The piston rod of the mud gate oil cylinder is extended to push the telescopic tube downward, and the upper pull rod slides down in the sleeve, driving the lower pull rods on both sides to separate; the lower pull rod pushes the mud gate body to flip open, forming a gap for mud unloading; S2: Unlocking the positioning pin mechanism (preparation before opening): When the piston rod moves downward, the second pull rope relaxes, and the swing rod pushes the slider to slide in the movable plate slide groove. The slider pulls the positioning block through the first pull rope, compresses the elastic element to make it disengage from the positioning hole, and the movable seat is unlocked. The lower wedge block is separated from the upper wedge block, and the abutment seat moves downward and no longer tightly abuts against the limit groove. The limit block moves laterally as a whole to disengage from the limit groove, releasing the constraint on the upper pull rod; S3: ‌Mud Gate Closed‌: The piston rod contracts, pulling the upper rod upward through the telescopic tube, and the lower rod retracts, driving the mud door body to close; S4: Positioning pin mechanism locking (self-locking after closing): The piston rod moves upward to tighten the second pull rope, dragging the movable seat and the base into the limit groove; after the base touches the stop block, the movable seat continues to slide inward, and the lower wedge block lifts the upper wedge block, so that the abutment seat moves upward and clamps the inner wall of the limit groove, and the positioning block bounces into the positioning hole under the action of the elastic element, locking the movable seat, ensuring that the limit block and the upper pull rod are in abutment state, limiting the downward movement of the upper pull rod.

[0016] Compared with the prior art, the present invention provides an ultra-large square mud door installation structure, a trailing suction dredger and a method of using the same, which have the following beneficial effects: 1. This ultra-large square mud gate installation structure, trailing suction hopper dredger, and method of use utilize the cylinder's own stroke to drive the positioning pin mechanism, eliminating the need for an additional power source. This reduces hydraulic system energy consumption and allows the cylinder to synchronously open and close the mud gate and decouple the positioning pin with a single stroke. This overcomes the limitations of traditional systems requiring independent oil circuits / electrical controls, achieving mechanical intelligence for the "one-motion, dual-control" system of heavy-duty ship mechanisms and effectively improving efficiency when opening and closing the mud gate.

[0017] 2. The super-large square mud door installation structure, the trailing suction dredger and the method of use thereof are such that when the limit block limits the upper pull rod, the movable plate and the fixed plate are in a vertical state, thereby reducing the occupied area of the installation plate, facilitating maintenance of the main deck, avoiding collision and injury to workers, and ensuring a safe working environment for workers.

[0018] 3. The installation structure of the super-large square sluice gate, the trailing suction hopper dredger and its usage method. Before the limiting block releases the limit on the upper pull rod, the first pulling rope applies a pulling force to the positioning block. The positioning block moves upward in the groove and moves out of the positioning hole, releasing the restriction between the moving seat and the base. As the slider continues to move horizontally, the pulling force of the first pulling rope on the positioning block is transmitted to the moving seat, causing the lower wedge block on the moving seat to no longer abut against the upper wedge block of the abutting seat. The moving seat moves horizontally in the base, and the abutting seat no longer receives force and moves downward, so that the upper side of the abutting seat no longer abuts against the inner wall of the limiting groove, reducing the resistance for the subsequent limiting block to move out of the limiting groove. When the limiting block limits the upper pull rod, the lower wedge block on the moving seat abuts against the upper wedge block of the abutting seat, causing the abutting seat to move upward relative to the base, so that the top of the abutting seat abuts against the inner wall of the limiting groove, effectively limiting the upper pull rod, preventing the upper pull rod from moving downward, ensuring the sealing between the sluice gate and the hull, and preventing mud leakage.

[0019] 4. The installation structure of the super-large square sluice gate, the trailing suction hopper dredger and its usage method. The triangular truss structure (upper elbow plate, lower elbow plate, support rod) of the support member offsets the lateral load of the sluice gate, ensuring the vertical movement accuracy of the upper pull rod sliding in the sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Structural schematic diagram when the sluice gate of the present invention is closed; Figure 2 Structural schematic diagram when the sluice gate of the present invention is opened; Figure 3 Structural schematic diagram of the support member of the present invention; Figure 4 Structural schematic of the outside of the mounting bracket of the present invention Figure 1 ; Figure 5 Structural schematic of the outside of the mounting bracket of the present invention Figure 2 ; Figure 6 For the present invention Figure 5 Enlarged structural schematic diagram of part A in; Figure 7 Partial sectional structural schematic diagram of the present invention; Figure 8 For the present invention Figure 7 Enlarged structural schematic diagram of part B in; Figure 9 Sectional structural schematic diagram of the sleeve of the present invention; Figure 10 Structural schematic diagram of the mounting plate of the present invention; Figure 11 Sectional structural schematic diagram of the limiting block of the present invention; Figure 12 For the present invention Figure 11 Enlarged structural schematic diagram of part C in.

[0021] In the figure: 1. Sludge hold; 2. Main deck; 3. Sludge door oil cylinder; 301. Piston rod; 4. Sleeve; 5. Support member; 501. Upper elbow plate; 502. Lower elbow plate; 503. Support rod; 6. Pushing member; 601. Telescopic tube; 602. Upper pull rod; 603. Lower pull rod; 7. Sludge door body; 8. Mounting frame; 9. Mounting plate; 901. Fixed plate; 902. Movable plate; 9021. Slide groove; 903. Stopper; 10. Limit block; 1001. Base; 1002. Moving seat; 1003. Lower wedge block; 1004. Guide rod; 1005. Contact seat; 1006. Upper wedge block; 11. Swing rod; 111. Slide block; 112. First pull rope; 12. Second pull rope; 13. Limit groove; 14. Groove; 141. Positioning block; 142. Elastic element; 15. Positioning hole; 16. Trailing suction hopper dredger body. Specific embodiments

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0024] Such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 9As shown in the figure, this embodiment proposes an installation structure for an ultra-large square sluice gate, which includes an installation frame 8 arranged on the main deck 2 at the top of the mud tank 1, and also includes: a sluice gate oil cylinder 3, a sleeve 4, a support member 5, a pushing member 6, and a positioning pin mechanism; the sluice gate oil cylinder 3 is fixedly arranged on the installation frame 8, the top of the sleeve 4 is connected to the installation frame 8, and its bottom passes through the main deck 2 and extends into the mud tank 1. The support member 5 is fixedly arranged on the inclined bottom plate of the mud tank 1. 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. The pushing member 6 slides in the sleeve 4 and its top is connected to the piston rod 301 of the sluice gate oil cylinder 3. The bottom of the pushing member 6 is movably connected to the sluice gate body 7 hinged to the bottom of the mud tank 1. Sealing rubber should be provided at the docking place of the two sluice gate bodies 7 at the bottom of the mud tank 1 and at the hinge where the sluice gate body 7 is hinged to the bottom opening of the mud tank 1 to prevent material leakage when the sluice gate body 7 is closed. This is the prior art and will not be elaborated here. The positioning pin mechanism is arranged outside the sleeve 4 and is connected to the piston rod 301 of the sluice gate oil cylinder 3 for releasing the upward pulling force of the sluice gate oil cylinder 3 on the pushing member 6; Further, the pushing member 6 includes a telescopic tube 601 connected to the piston rod 301 of the sluice gate oil cylinder 3, an upper pull rod 602 arranged at the bottom of the telescopic tube 601, and lower pull rods 603 rotatably arranged on both sides of the upper pull rod 602 through a rotating shaft. The upper pull rod 602 is slidably connected in the sleeve 4, and the two lower pull rods 603 are respectively rotatably connected to the two sluice gate bodies 7 at the bottom of the mud tank 1; The sluice gate oil cylinder 3 is rigidly connected to the installation frame 8 by a flange. The sleeve 4 penetrates the main deck 2 and is rigidly fixed to the bottom plate of the mud tank 1 through the triangular truss of the support member 5 to form a stable force transmission path against eccentric load. During the opening stage, the piston rod 301 of the oil cylinder pushes down the telescopic tube 601. During the downward movement of the piston rod 301, the positioning pin mechanism automatically releases the limit on the upper pull rod 602, enabling the upper pull rod 602 to move downward. The lower pull rod 603 pushes the sluice gate body 7 to flip to a maximum opening of 45°, and the mud is discharged through the square opening. During the closing stage, the piston rod 301 retracts to drive the sluice gate to close. During this period, the positioning pin mechanism limits the upper pull rod 602, solves the problem that the high-pressure oil pump of the hydraulic system of the sluice gate oil cylinder 3 maintains a high-pressure state during navigation, prevents leakage and sealing after the sluice gate body 7 is closed, replaces the continuous pressure maintenance of the oil cylinder with mechanical locking, effectively reduces the power consumption of the hydraulic system, reduces the occupied area of the deck equipment, enables the single stroke of the oil cylinder to synchronously complete the opening and closing of the sluice gate and the decoupling of the positioning pin, breaks through the limitation of the traditional system that requires an independent oil circuit / electric control, realizes the mechanical intelligence of "one movement and dual control" of the ship's heavy mechanism, and effectively improves the working efficiency when the sluice gate is opened and closed.

[0025] As Figure 1 、 Figure 2 and Figure 3As shown, as a preferred embodiment, on the basis of the above method, further, the support member 5 includes an upper elbow plate 501 fixedly connected to the outer wall of the sleeve 4, a lower elbow plate 502 connected to the inner wall of the bottom of the sludge tank 1, and a support rod 503 disposed 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 to the outer wall of the sleeve 4 by double-sided fillet welding. The lower elbow plate 502 is rigidly connected to the prefabricated base at the bottom of the sludge tank 1 by bolts, and the contact surface is coated with a wear-resistant epoxy resin coating. The support rod 503 is a hollow circular tube, with 30° bevels provided at both ends for welding with the elbow plate, and the inside is filled with polyurethane damping material. The lateral load of the sluice door is offset by the triangular truss structure of the support member 5, namely, the upper elbow plate 501, the lower elbow plate 502, and the support rod 503, to ensure the vertical movement accuracy of the upper tie rod 602 sliding in the sleeve 4.

[0026] As Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, as a preferred embodiment, on the basis of the above method, further, the positioning pin mechanism includes a mounting plate 9 fixedly provided between the mounting frame 8 and the sleeve 4, a limiting block 10 slidably connected to the mounting plate 9, and a driving member disposed between the piston rod 301 of the sluice door cylinder 3 and the limiting block 10. Limiting grooves 13 adapted to the limiting block 10 are provided on both the sleeve 4 and the upper tie rod 602; the driving member includes a swing rod 11 movably connected to the piston rod 301 of the sluice door cylinder 3, a slider 111 rotatably connected to the end of the swing rod 11 away from the piston rod 301 and slidably connected to the mounting plate 9, and a first pulling rope 112 disposed between the slider 111 and the limiting block 10; Further, the mounting plate 9 includes 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 by a pin shaft. A sliding groove 9021 for the slider 111 to slide is provided on the movable plate 902. The sliding groove 9021 is a T-shaped guide groove structure, internally provided with a PTFE wear-resistant bushing, and the clearance between it and the slider 111 is controlled within 0.1 mm. When the piston rod 301 expands and contracts, the swing rod 11 drives the slider 111 to slide along the sliding groove 9021, and the movable plate 902 deflects adaptively to eliminate the movement interference of the mechanism; The limit block 10 is a tungsten steel component, and the clearance between it and the limit groove 13 is controlled within 0.05 - 0.1 mm. The first draw rope 112 is made of steel wire rope and is wrapped with a wear-resistant sleeve. During the unlocking stage (when the sluice door is opened), the piston rod 301 moves downward, and the telescopic tube 601 is compressed. During this period, the piston rod 301 exerts a force on the slider 111 through the swing rod 11, causing the slider 111 to drive the movable plate 902 to flip. Finally, the movable plate 902 is horizontally placed with the fixed plate 901, providing support for the subsequent horizontal movement of the limit block 10. As the piston rod 301 continues to move downward, the swing rod 11 drives the slider 111 to slide on the horizontally placed movable plate 902. When the slider 111 moves, it exerts a pulling force on the limit block 10 through the first draw rope 112, causing the limit block 10 to disengage from the limit groove 13, facilitating the 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, requires no additional power source, reduces the energy consumption of the hydraulic system, and enables the sluice door to be opened and closed and the positioning pin to be decoupled synchronously in a single stroke of the oil cylinder. Moreover, when the limit 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 the maintenance of the main deck 2, and avoiding collisions and injuries to the staff, ensuring a safe working environment for the staff.

[0027] As Figure 5 , Figure 6 , Figure 7 , Figure 10 and Figure 11 shown, as a preferred embodiment, on the basis of the above method, further, a second draw rope 12 is fixedly installed on the piston rod 301 of the sluice door oil cylinder 3. One end of the second draw rope 12 far from the piston rod 301 is connected to the side of the limit block 10 far from the first draw rope 112. A stop block 903 that is movably abutted against the limit block 10 is fixedly installed on the mounting plate 9. The second draw rope 12 is made of stainless steel wire rope and is connected to the piston rod 301 through a quick-release U-shaped clamp. The breaking load ≥ 35 kN. The contact surface of the stop block 903 is inlaid with a copper-based wear-resistant sheet. During the linkage unlocking stage, the piston rod 301 extends, and the first draw rope 112 pulls the limit block 10 out of the limit groove 13. During this period, the second draw rope 12 is released. During the reset locking stage, the piston rod 301 retracts, the first draw rope 112 becomes slack, the second draw rope 12 is tensioned, and the limit block 10 is pulled and inserted into the limit groove 13 and positioned against the stop block 903.

[0028] As Figure 7 , Figure 8 , Figure 10 , Figure 11 and Figure 12As shown, as a preferred embodiment, on the basis of the above method, further, the limiting block 10 includes a base 1001 slidably connected to the mounting plate 9, a moving seat 1002 slidably connected to the cavity of the base 1001, a plurality of lower wedges 1003 fixed on the moving seat 1002, an abutting seat 1005 connected to the base 1001 through a guide rod 1004, and an upper wedge 1006 disposed on the lower side of the abutting seat 1005 and movably abutted against the lower wedge 1003. The base 1001 is slidably connected to the guide rod 1004. The end of the second pull rope 12 away from the piston rod 301 is connected to the moving seat 1002; Further, a groove 14 is formed at the bottom of the moving seat 1002. A positioning block 141 is slidably connected in the groove 14. An elastic element 142 is disposed between the positioning block 141 and the inner wall of the groove 14. An extrusion inclined surface is formed at the bottom of the positioning block 141. A positioning hole 15 matching the positioning block 141 is formed in the inner wall of the cavity of the base 1001. The end of the first pull rope 112 away from the slider 111 passes through the base 1001 and the moving seat 1002 in sequence and is connected to the positioning block 141; Working process: When the sluice door bodies 7 on both sides are closed, the limit blocks 10 are inserted into the limit grooves 13 to prevent the sluice door oil cylinder 3 from maintaining a high-pressure state and continuously pulling up the pushing member 6. When it is necessary to control the opening of the sluice door, the piston rod 301 of the sluice door oil cylinder 3 extends. Since the upper pull rod 602 is restricted by the limit block 10, the piston rod 301 will first press down on the telescopic tube 601, and the second pull rope 12 is no longer taut. The telescopic tube 601 contracts. When the piston rod 301 moves upward, it acts on the slider 111 through the swing rod 11, causing the slider 111 to drive the movable plate 902 to flip. The movable plate 902 finally becomes horizontal with the fixed plate 901, providing support for the horizontal movement of the limit block 10. As the piston rod 301 continues to move downward, the swing rod 11 drives the slider 111 to slide on the horizontally placed movable plate 902. When the slider 111 moves, it applies a force to the positioning block 141 through the first pull rope 112. The positioning block 141 moves upward 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 slider 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, causing the lower wedge block 1003 on the moving seat 1002 to no longer abut against the upper wedge block 1006 of the abutting seat 1005. The moving seat 1002 moves horizontally in the base 1001, and the abutting seat 1005 no longer receives force and moves downward, so that the upper side of the abutting seat 1005 no longer abuts against the inner wall of the limit groove 13, reducing the resistance for the subsequent limit block 10 to move out of the limit groove 13. The moving seat 1002 drives the base 1001 and the abutting seat 1005 connected to the base 1001 to move towards the movable plate 902. Finally, the limit block 10 moves out of the limit groove 13. As the piston rod 301 continues to move downward, the piston rod 301 applies a force to the upper pull rod 602 through the telescopic tube 601, and the upper pull rod 602 opens the sluice door body 7 through the lower pull rod 603;When the mud door body 7 is closed, the piston rod 301 contracts into the mud door cylinder 3, and the piston rod 301 pulls the slider 111 through the swing rod 11, and the slider 111 drives the movable plate 902 to flip relative to the fixed plate 901. When the movable plate 902 flips, the limit block 10 is pushed to move toward the limit groove 13. At the same time, the upward movement of the piston rod 301 applies tension to the movable seat 1002 through the second pull rope 12, and the movable seat 1002 drives the base 1001 to move horizontally on the mounting plate 9 and insert into the limit groove 13. As the base 1001 abuts against the stop block 903, the movable seat 1002 continues to be pulled by the second pull rope 12 and slides in the inner cavity of the base 1001, and the lower wedge on the movable seat 1002 Block 1003 abuts against the upper wedge block 1006 on the abutting seat 1005, causing the abutting seat 1005 to move upward relative to the base 1001, so that the top of the abutting seat 1005 abuts against the inner wall of the limiting groove 13, effectively limiting the upper pull rod 602, ensuring the seal between the mud door and the hull, and preventing mud leakage. At this time, the positioning block 141 will be inserted into the positioning hole 15, limiting the position of the movable seat 1002 and maintaining the abutting state of the abutting seat 1005 and the inner wall of the limiting groove 13. Only when the piston rod 301 moves downward again to control the opening of the mud door body 7, the first pull rope 112 applies tension to the positioning block 141, and the abutting state of the abutting seat 1005 and the inner wall of the limiting groove 13 is released.

[0029] The present invention further provides a trailing suction hopper dredger, comprising a mud chamber 1 provided with the aforementioned super-large square mud door mounting structure, and a trailing suction hopper dredger body 16 , wherein the mud chamber 1 is arranged in the trailing suction hopper dredger body 16 .

[0030] The present invention also discloses a method for using the super-large square mud door installation structure, comprising the following steps: S1: Mud Gate Opening‌ The piston rod 301 of the mud gate oil cylinder 3 extends, pushing 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 rods 603 push the mud gate body 7 to flip open, forming a gap for unloading mud; S2: Unlocking the positioning pin mechanism (preparation before opening): 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 separates from the upper wedge block 1006, and the abutment seat 1005 moves downward and no longer tightly abuts against the limiting groove 13. The limiting block 10 moves laterally as a whole to disengage from the limiting groove 13, releasing the constraint on the upper pull rod 602. S3: ‌Mud Gate Closed‌: The piston rod 301 contracts, pulling the upper rod 602 upward through the telescopic tube 601, and the lower rod 603 retracts, driving the mud door body 7 to close; S4: Positioning pin mechanism locking (self-locking after closing): 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 touches the stop block 903, the movable seat 1002 continues to slide inward, and the lower wedge block 1003 lifts the upper wedge block 1006, so that the abutment seat 1005 moves upward to clamp the inner wall of the limit groove 13, and the positioning block 141 bounces 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, limiting the downward movement of the upper pull rod 602.

[0031] The drawings in this application are for illustrative purposes only. The sizes and shapes of the components shown are not intended to be limiting, but are merely for illustrative purposes. In actual implementation, the components may be appropriately configured and adjusted based on specific needs and actual conditions.

[0032] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An installation structure for an extra-large square sluice door, comprising a mounting frame (8) arranged on the main deck (2) at the top of a mud tank (1), characterized in that, It further includes: A sluice door oil cylinder (3), which is fixedly arranged on the mounting bracket (8); A sleeve (4), the top of the sleeve (4) is connected to the mounting bracket (8), and its bottom passes through the main deck (2) and extends into the sludge tank (1); A support member (5), the support member (5) is fixedly arranged on the inclined bottom plate of the sludge tank (1), and one end of the support member (5) away from the inner wall of the sludge tank (1) is connected to the bottom of the sleeve (4); A pushing member (6), the pushing member (6) slides in the sleeve (4) and its top is connected to the piston rod (301) of the sluice door oil cylinder (3), and the bottom of the pushing member (6) is movably connected to the sluice door body (7) hinged to the bottom of the sludge tank (1); And a positioning pin mechanism, which is arranged outside the sleeve (4) and connected to the piston rod (301) of the sluice door oil cylinder (3) for releasing the upward pulling force of the sluice door oil cylinder (3) on the pushing member (6).

2. The installation structure of an ultra-large square sluice door according to claim 1, characterized in that The support member (5) includes an upper elbow plate (501) fixedly connected to the outer wall of the sleeve (4), a lower elbow plate (502) connected to the inner wall of the bottom of the sludge tank (1), and a support rod (503) arranged between the upper elbow plate (501) and the lower elbow plate (502). The pushing member (6) includes a telescopic tube (601) connected to the piston rod (301) of the sluice door oil cylinder (3), an upper pull rod (602) arranged at the bottom of the telescopic tube (601), and lower pull rods (603) rotatably arranged on both sides of the upper pull rod (602) through a rotating shaft. The upper pull rod (602) is slidably connected in the sleeve (4), and the two lower pull rods (603) are respectively rotatably connected to the two sluice door bodies (7) at the bottom of the sludge tank (1).

3. The installation structure of an ultra-large square mud gate according to claim 2, characterized in that, The positioning pin mechanism includes a mounting plate (9) fixedly arranged between the mounting bracket (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 sluice door oil cylinder (3) and the limit block (10). Limit grooves (13) matching the limit block (10) are respectively arranged on the sleeve (4) and the upper pull rod (602).

4. The installation structure of an extra-large square mud gate according to claim 3, characterized in that The driving member includes a swing rod (11) movably connected to the piston rod (301) of the sluice door oil 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).

5. The installation structure of an ultra-large square mud gate according to claim 4, characterized in that, The mounting plate (9) includes a fixed plate (901) fixedly connected to the mounting bracket (8) and a movable plate (902) rotatably connected to one side of the fixed plate (901) through a pin shaft. A sliding groove (9021) for the slider (111) to slide is arranged on the movable plate (902).

6. The installation structure of an extra-large square sluice door according to claim 5, characterized in that A second pull rope (12) is fixedly arranged on the piston rod (301) of the sluice door oil cylinder (3), and one end of the second pull rope (12) away from the piston rod (301) is connected to the side of the limit block (10) away from the first pull rope (112). A stop block (903) movably abutted against the limit block (10) is fixedly arranged on the mounting plate (9).

7. The super-large square sluice gate installation structure according to claim 6, 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).

8. A super-large square mud gate installation structure according to claim 7, 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).

9. A trailing suction hopper dredger, comprising a hopper (1) provided with the ultra-large square sluice installation structure as described in claim 8, 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).

10. A method for using the installation structure of an ultra-large square sluice door according to any one of claims 1-8, 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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