Drag head double-grid device of trailing suction hopper dredger

Abstract

The utility model discloses a trailing suction hopper dredger rake head double-grid device which comprises a digging head body, an arc face feeding port is formed in the outer wall of one side of the digging head body, an arc-shaped grid is installed on the inner wall of the arc face feeding port, a hidden groove is formed in the inner wall of the bottom of the digging head body, a plane grid is arranged in the hidden groove, and the plane grid is connected with the arc-shaped grid. A rotating rod is fixedly arranged on the outer wall of one side of the plane grating, the outer walls of the two ends of the rotating rod are movably connected with the inner walls of the two sides of the bottom of the digging head body, and a positioning rod inclining upwards is fixedly arranged on the outer wall of one side of the top of the digging head body. The output shaft of the hydraulic push rod shrinks, the hydraulic push rod drives one end of the top of the plane grille to move upwards, the grille on the plane grille is pushed out upwards from the grille gap of the arc-shaped grille, impurities attached to the grille gap of the arc-shaped grille can be pushed out, the impurities attached to the arc-shaped grille can be cleaned, and the service life of the arc-shaped grille is prolonged. The sludge conveying pipeline is prevented from being blocked, and the sludge conveying speed of the sludge conveying pipeline is prevented from being influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of dredging engineering, in particular to a double-grille device for the drag head of a trailing suction hopper dredger. Background Art

[0002] At present, trailing suction hopper dredgers will encounter various working conditions during construction. Generally, grilles are installed at the drag head to prevent sundries such as stones, wooden piles, and fishing nets from entering the mud conveying pipeline.

[0003] However, although the grilles installed on the drag head of the existing trailing suction hopper dredgers can block impurities from entering the mud conveying pipeline, the impurities will still adhere to the grilles, resulting in pipeline blockage and affecting the mud conveying speed. For this reason, we propose a double-grille device for the drag head of a trailing suction hopper dredger. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a double-grille device for the drag head of a trailing suction hopper dredger to solve the above-mentioned deficiencies in the technology.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A double-grille device for the drag head of a trailing suction hopper dredger, including a dredging head main body. An arc-shaped feed port is opened on the outer wall of one side of the dredging head main body, and an arc-shaped grille is installed on the inner wall of the arc-shaped feed port. A hidden groove is opened on the bottom inner wall of the dredging head main body, and a flat grille is arranged inside the hidden groove. A rotating rod is fixedly arranged on the outer wall of one side of the flat grille, and both ends of the rotating rod are movably connected with the inner walls of both sides of the bottom of the dredging head main body. A positioning rod inclined upward is fixedly arranged on the outer wall of one side of the top of the dredging head main body. A first hinge block is arranged at one end of the top of the positioning rod, and a second hinge block is fixedly arranged at one end of the top of the flat grille. A hydraulic push rod is arranged between the first hinge block and the second hinge block, and first hinge plates and second hinge plates are respectively fixedly arranged on the outer walls of both ends of the hydraulic push rod.

[0006] Preferably, one end of the dredging head main body is communicated with a mud tank, and a sludge conveying pipe is fixedly arranged on the outer wall of one side of the mud tank through an opening. The sludge conveying pipe is convenient for conveying the sludge grabbed by the dredging head main body to the dredger.

[0007] Preferably, the hydraulic push rod is movably connected with the first hinge block through the first hinge plate, and the hydraulic push rod is movably connected with the second hinge block through the first hinge block.

[0008] Preferably, a plurality of drag teeth are fixedly arranged at equal intervals at one end of the bottom of the dredging head main body. The drag teeth are convenient for grabbing the sludge at the bottom of the river.

[0009] Preferably, the grilles on the arc-shaped grille and the flat grille are cross-distributed.

[0010] In the above technical solution, the technical effects and advantages provided by the present utility model are as follows:

[0011] When the output shaft of the hydraulic push rod contracts, the hydraulic push rod drives one end of the top of the flat grille to move upward, and the grille on the flat grille is pushed upward at the grille gap of the upper grille of the arc-shaped grille, so as to push out the impurities attached to the gap of the upper grille of the arc-shaped grille, clean the impurities attached to the arc-shaped grille, prevent blockage of the sludge conveying pipeline, and avoid affecting the sludge conveying speed of the sludge conveying pipeline. Brief Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0013] Figure 1 It is a three-dimensional structure schematic diagram of a double-grille device for the rake head of a trailing suction hopper dredger according to the present utility model;

[0014] Figure 2 It is a schematic diagram of the structure of the dredging head main body of a double-grille device for the rake head of a trailing suction hopper dredger according to the present utility model;

[0015] Figure 3 It is a schematic diagram of the structure of the arc-shaped grille of a double-grille device for the rake head of a trailing suction hopper dredger according to the present utility model;

[0016] Figure 4 It is a schematic diagram of the structure of the flat grille of a double-grille device for the rake head of a trailing suction hopper dredger according to the present utility model;

[0017] Figure 5 It is a schematic diagram of the structure of the hydraulic push rod of a double-grille device for the rake head of a trailing suction hopper dredger according to the present utility model.

[0018] Explanation of the reference numerals:

[0019] 1 Dredging head main body, 2 Mud hold, 3 Sludge conveying pipe, 4 Arc-shaped feed port, 5 Arc-shaped grille, 6 Hidden groove, 7 Flat grille, 8 Rotating rod, 9 Positioning rod, 10 First hinge block, 11 Second hinge block, 12 Hydraulic push rod, 13 First hinge plate, 14 Second hinge plate, 15 Rake teeth. Detailed Embodiments

[0020] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the following will further introduce the present utility model in detail in conjunction with the drawings.

[0021] Embodiment 1

[0022] Refer to the attached drawings of the specification Figures 1-5, A double-grille device for the drag head of a trailing suction hopper dredger, comprising a dredging head main body 1. An arc-shaped feed port 4 is opened on the outer wall of one side of the dredging head main body 1. An arc-shaped grille 5 is installed on the inner wall of the arc-shaped feed port 4. A hidden groove 6 is opened on the inner wall of the bottom of the dredging head main body 1. A flat grille 7 is arranged inside the hidden groove 6. A rotating rod 8 is fixedly arranged on the outer wall of one side of the flat grille 7. The outer walls of both ends of the rotating rod 8 are movably connected to the inner walls of both sides of the bottom of the dredging head main body 1. A positioning rod 9 inclined upward is fixedly arranged on the outer wall of one side of the top of the dredging head main body 1. A first hinge block 10 is arranged at one end of the top of the positioning rod 9. A second hinge block 11 is fixedly arranged at one end of the top of the flat grille 7. A hydraulic push rod 12 is arranged between the first hinge block 10 and the second hinge block 11. First hinge plates 13 and second hinge plates 14 are respectively fixedly arranged on the outer walls of both ends of the hydraulic push rod 12.

[0023] Embodiment 2

[0024] Based on Embodiment 1, one end of the dredging head main body 1 is communicated with a mud tank 2. A sludge conveying pipe 3 is fixedly arranged on the outer wall of one side of the mud tank 2 through an opening. The sludge conveying pipe 3 facilitates the conveyance of the sludge grabbed by the dredging head main body 1 to the dredger. The hydraulic push rod 12 is movably connected to the first hinge block 10 through the first hinge plate 13. The hydraulic push rod 12 is movably connected to the second hinge block 11 through the first hinge block 10. A plurality of dredging teeth 15 are fixedly arranged at one end of the bottom of the dredging head main body 1 at equal intervals. The dredging teeth 15 facilitate the grabbing of the sludge at the bottom of the river. The grilles on the arc-shaped grille 5 and the flat grille 7 are cross-distributed.

[0025] The working principle of the present utility model:

[0026] Referring to the attached drawings of the specification Figures 1-5 , when the present utility model is used, the present utility model is installed at the bottom of the sludge conveying ship. The sludge at the bottom of the river is grabbed by the cooperation of the dredging head main body 1 and the dredging teeth 15. The arc-shaped grille 5 installed on the inner wall of the arc-shaped feed port 4 on the dredging head main body 1 can block and filter the impurities in the sludge, preventing the impurities from entering the sludge conveying pipeline. The impurities are blocked outside by the arc-shaped grille 5. At this time, the output shaft of the hydraulic push rod 12 contracts, and the hydraulic push rod 12 drives the top end of the flat grille 7 to move upward. The grille on the flat grille 7 is pushed upward at the gap of the grille on the arc-shaped grille 5, which can push out the impurities attached to the gap of the grille on the arc-shaped grille 5, and can clean the impurities attached to the arc-shaped grille 5, preventing the sludge conveying pipeline from being blocked and avoiding affecting the sludge conveying speed of the sludge conveying pipeline. After the impurities on the arc-shaped grille 5 are cleaned, the flat grille 7 is pushed by the output shaft of the hydraulic push rod 12 to be embedded and hidden in the inner wall of the hidden groove 6.

[0027] Only some exemplary embodiments of the present utility model are described by way of illustration. Undoubtedly, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present utility model. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present utility model.

Claims

1. A double-grid device for a drag head of a trailing suction dredger, comprising a dredging head body (1), characterized in that: The outer wall of one side of the excavator body (1) is provided with an arc-shaped feed port (4), and the inner wall of the arc-shaped feed port (4) is provided with an arc-shaped grille (5). The inner wall of the bottom of the excavator body (1) is provided with a hidden groove (6), and a plane grille (7) is provided inside the hidden groove (6). A rotating rod (8) is fixedly provided on the outer wall of one side of the plane grille (7), and the outer walls at both ends of the rotating rod (8) are movably connected to the inner walls at both sides of the bottom of the excavator body (1). A positioning rod (9) inclined upward is fixedly provided on the outer wall of one side of the top of the excavator body (1), and a first hinge block (10) is provided at one end of the top of the positioning rod (9). A second hinge block (11) is fixedly provided at one end of the top of the plane grille (7). A hydraulic push rod (12) is provided between the first hinge block (10) and the second hinge block (11), and a first hinge plate (13) and a second hinge plate (14) are fixedly provided on the outer walls at both ends of the hydraulic push rod (12).

2. A double grid device for a trailing suction dredger according to claim 1, characterized in that: One end of the excavator head body (1) is connected to a mud chamber (2), and a mud conveying pipe (3) is fixedly provided on an outer wall of one side of the mud chamber (2) through an opening.

3. The double grid device for the drag head of a trailing suction dredger according to claim 1, characterized in that: The hydraulic push rod (12) is movably connected to the first hinge block (10) via a first hinge plate (13), and the hydraulic push rod (12) is movably connected to the second hinge block (11) via the first hinge block (10).

4. The double grid device for the drag head of a trailing suction dredger according to claim 1, characterized in that: Rake teeth (15) distributed at equal distances are fixedly provided at one end of the bottom of the digging head body (1).

5. The double grid device for the drag head of a trailing suction dredger according to claim 1, characterized in that: The arc-shaped grid (5) and the grids on the plane grid (7) are distributed crosswise.

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