Modularized rake head with double rows of teeth

Abstract

A modularized rake head with double rows of teeth comprises a fixed body, an adjustable movable cover and modularized rake teeth, the adjustable movable cover is connected with the front side of the fixed body, and the modularized rake teeth are connected with the inner side of the adjustable movable cover. The adjustable movable cover comprises a wear-resisting block, an oil cylinder, a hinge, a wear-resisting baffle and a switching baffle. Compared with the prior art, the adjustable movable cover is additionally arranged, the switching function is achieved through the rear-row detachable module rake teeth and the rotary baffle, switching of the single-row rake teeth and the double-row rake teeth is achieved, and the requirement for cutting characteristics of different soil textures is met.

Description

Technical Field

[0001] The utility model relates to a dredging draghead structure, in particular to a double-row tooth modular draghead. Background Art

[0002] In the traditional dredging ship drag tooth technology, the seabed soil is mainly loosened by mechanical cutting. This technology has the following problems:

[0003] Large cutting resistance: During dredging, especially when encountering difficult-to-dig soil types such as dense and compact silt, fine sand, and hard clay, the construction concentration of traditional drag teeth is usually very low, and the mud density is about 1.10t / m 3 , resulting in a multiple increase in cutting resistance.

[0004] Low efficiency: Due to the increase in cutting resistance, the production efficiency of the dredging ship is affected, and the construction progress is slow. Especially when constructing difficult-to-dig soil types such as dense fine silt in Huanghua Port and "iron plate sand" in the Yangtze Estuary, the construction efficiency problem of the draghead is particularly prominent.

[0005] Difficulty in adjusting construction parameters: In dredging construction, plane control and depth control are technical difficulties. Problems such as inaccurate ship positioning, inaccurate checking of the attitude of the drag arm and the ship, and inaccurate depth sensors of the drag arm make over-excavation and over-depth very serious during the dredging process, additionally increasing the dredging workload and reducing the efficiency.

[0006] In the test of the drag tooth cutting soil monitoring device carried out in Huanghua Port, it was found that during the cutting process of the drag teeth on the soil, due to the extrusion and shear deformation of the soil in a short time, it is difficult for the external water body to complete the internal and external fluid exchange, resulting in a sudden decrease in pore water pressure and a sudden increase in effective stress of the soil due to the dilatancy effect, thus doubling the cutting resistance.

[0007] In the channel projects of Jingtang Port Area of Tangshan Port and Rongxing Port Area of Panjin Port, the traditional drag teeth are limited in excavating hard clay and dense silt, resulting in excavation problems for large trailing suction hopper dredgers during construction. These problems have been solved by optimizing the design of a new type of draghead and construction technology, improving the penetration ability and reducing the draghead excavation resistance.

[0008] Through the above analysis, we can see the limitations of the traditional dredging ship drag tooth technology in terms of cutting resistance, efficiency, and construction parameter adjustment. Moreover, different construction projects also have different draghead requirements due to environmental differences.

[0009] To solve the above problems, a series of improvements have been made. Content of the Utility Model

[0010] The purpose of the utility model is to provide a double-row tooth modular draghead to overcome the above-mentioned drawbacks and deficiencies of the prior art.

[0011] A double-row tooth modular rake head, comprising: a fixed body, an adjustable movable cover and modular rake teeth, wherein the adjustable movable cover is connected to the front side of the fixed body, and the modular rake teeth are connected to the inner side of the adjustable movable cover;

[0012] Wherein, the adjustable movable cover includes: wear-resistant blocks, oil cylinders, hinges, wear-resistant baffles and switching baffles, the wear-resistant blocks are connected to the hinges, the oil cylinders are connected to the fixed body and the upper part of the adjustable movable cover, the oil cylinders are connected to the modular rake teeth through pipelines, the wear-resistant baffles are connected to the lower end of the adjustable movable cover, the switching baffles are connected to the upper end of the modular rake teeth, and the switching baffles are connected to the inside of the upper end of the adjustable movable cover.

[0013] Furthermore, rubber blocks, floats and ball valves are provided on the fixed body, and the rubber blocks, floats and ball valves are connected to the upper part of the fixed body.

[0014] Furthermore, the modular rake teeth include: front-row modular rake teeth, rear-row modular rake teeth and polymer nozzles, the front-row modular rake teeth and the rear-row modular rake teeth are connected to the switching baffles, and the polymer nozzles are connected to the upper ends of the front-row modular rake teeth and the rear-row modular rake teeth.

[0015] The beneficial effects of the present utility model:

[0016] Compared with the traditional technology, by adding an adjustable movable cover and using the rear-row detachable modular rake teeth and the rotating baffle to achieve the switching function, the switching between single-row and double-row rake teeth is realized to meet the cutting characteristic requirements of different soil types. Description of the drawings

[0017] Figure 1 is a schematic structural diagram of the present utility model.

[0018] Figure 2 is a top view of the present utility model.

[0019] Figure 3 is a sectional view of the adjustable movable cover of the present utility model.

[0020] Reference numerals:

[0021] Fixed body 100, rubber block 110, float 120 and ball valve 130.

[0022] Adjustable movable cover 200, wear-resistant block 210, oil cylinder 220, hinge 230, wear-resistant baffle 240 and switching baffle 250.

[0023] Modular rake teeth 300, front-row modular rake teeth 310, rear-row modular rake teeth 320 and polymer nozzle 330. Detailed implementation manners

[0024] The following will further illustrate the present utility model in conjunction with specific embodiments. It should be understood that the following embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model.

[0025] Embodiment 1

[0026] Figure 1 is a schematic structural diagram of the present utility model. Figure 2 is a top view of the present utility model. Figure 3 is a sectional view of the adjustable movable cover of the present utility model.

[0027] As Figures 1 to 3 shown, a double-row tooth modular harrow head includes: a fixed body 100, an adjustable movable cover 200, and modular harrow teeth 300. The adjustable movable cover 200 is connected to the front side of the fixed body 100, and the modular harrow teeth 300 are connected to the inner side of the adjustable movable cover 200;

[0028] Among them, the adjustable movable cover 200 includes: wear-resistant blocks 210, an oil cylinder 220, hinges 230, wear-resistant baffles 240, and a switching baffle 250. The wear-resistant blocks 210 are connected to the hinges 230. The oil cylinder 220 is connected to the upper part of the fixed body 100 and the adjustable movable cover 200. The oil cylinder 220 is connected to the modular harrow teeth 300 through a pipeline. The wear-resistant baffles 240 are connected to the lower end of the adjustable movable cover 200. The switching baffle 250 is connected to the upper end of the modular harrow teeth 300, and the switching baffle 250 is connected to the inside of the upper end of the adjustable movable cover 200.

[0029] The fixed body 100 is provided with rubber blocks 110, a float 120, and a ball valve 130. The rubber blocks 110, the float 120, and the ball valve 130 are connected to the upper part of the fixed body 100.

[0030] The modular harrow teeth 300 include: front-row modular harrow teeth 310, rear-row modular harrow teeth 320, and polymer nozzles 330. The front-row modular harrow teeth 310 and the rear-row modular harrow teeth 320 are connected to the switching baffle 250, and the polymer nozzles 330 are connected to the upper ends of the front-row modular harrow teeth 310 and the rear-row modular harrow teeth 320.

[0031] The principle of the present utility model is that when the double-row harrow teeth are switched, first, the rear-row modular harrow teeth 320 are removed, and then the switching baffle 250 on the adjustable movable cover 200 is rotated so that a closed area is formed between the switching baffle 250 and the front-row modular harrow teeth 310, and then the front-row modular harrow teeth 310 are used for operation.

[0032] Through the design of the front-row modular rake teeth 310 and the rear-row modular rake teeth 320, the rake head can be quickly adjusted according to different soil conditions. This modular design not only improves the adaptability of the rake head but also greatly reduces the time and labor required for replacing the rake teeth. The switching baffle 250 inside the adjustable movable cover 200 can rotate to switch between single-row and double-row rake teeth. When single-row rake teeth are needed for dredging, the rear-row modular rake teeth 320 can be removed, and then the switching baffle 250 is rotated to form a closed area with the front-row modular rake teeth 310, so as to focus on operating with the front-row rake teeth. When operating with the front-row modular rake teeth 310, due to the removal of the rear-row rake teeth and the enclosure of the switching baffle 250, the cutting area is concentrated, thus improving the cutting efficiency. This concentrated cutting effect enables the rake head to penetrate hard soil layers more effectively and reduces the excavation resistance. The addition of the oil cylinder 220 provides power support, making the movement of the rake head smoother and more precise. The design of the wear-resistant baffle 240 protects the rake head from wear and extends the service life of the equipment. The setting of the polymer nozzle 330 optimizes the spraying process of the slurry, improves the discharge efficiency of the slurry, and further enhances the continuity and stability of the dredging operation.

[0033] The innovation of the present utility model lies in adding an adjustable movable cover and using the rear-row detachable modular rake teeth and the rotating baffle to achieve the switching function, realizing the switching between single-row and double-row rake teeth to meet the cutting characteristic requirements of different soil types. The adjustable movable cover 200 is equipped with an oil cylinder 220 and a hinge 230. These components work together to enable the movable cover to be precisely adjusted in position according to the operation requirements. The oil cylinder provides power, and the hinge ensures the smooth rotation of the movable cover. This mechanical synergy enables the rake head to remain stable when switching between different soil types. The design of the rear-row detachable modular rake teeth allows for quick disassembly and assembly under different operating conditions, which not only reduces the mechanical downtime but also lowers the labor intensity. The modular design means that the most suitable type of rake teeth can be selected according to the hardness and viscosity of the soil. The rotation of the switching baffle 250 can form a closed area between the front-row modular rake teeth 310 and the rear-row modular rake teeth 320. Such a design enables the cutting force to be concentrated during single-row rake teeth operation, improves the cutting efficiency, and at the same time reduces the spillage of the slurry and keeps the operation area clean.

[0034] The specific implementation manners of the present utility model have been described above, but the present utility model is not limited thereto. As long as it does not deviate from the purpose of the present utility model, the present utility model can have various changes.

Claims

1. A double-row-teeth modular rake head, characterized in that: include: A fixed body (100), an adjustable movable cover (200) and modular rake teeth (300), wherein the adjustable movable cover (200) is connected to the front side of the fixed body (100), and the modular rake teeth (300) are connected to the inner side of the adjustable movable cover (200); The adjustable movable cover (200) comprises: a wear-resistant block (210), an oil cylinder (220), a hinge (230), a wear-resistant baffle (240) and a switching baffle (250); the wear-resistant block (210) is connected to the hinge (230); the oil cylinder (220) is connected to a fixed body (100) and the upper part of the adjustable movable cover (200); the oil cylinder (220) is connected to the modular rake teeth (300) through a pipeline; the wear-resistant baffle (240) is connected to the lower end of the adjustable movable cover (200); the switching baffle (250) is connected to the upper end of the modular rake teeth (300); and the switching baffle (250) is connected to the interior of the upper end of the adjustable movable cover (200).

2. A double-row-teeth modular rake head according to claim 1, characterized in that: The fixed body (100) is provided with a rubber block (110), a float (120) and a ball valve (130), and the rubber block (110), the float (120) and the ball valve (130) are connected to the upper part of the fixed body (100).

3. The double-row-teeth modular rake head according to claim 1, characterized in that: The modular rake teeth (300) include: front-row modular rake teeth (310), rear-row modular rake teeth (320) and a polymer nozzle (330); the front-row modular rake teeth (310) and the rear-row modular rake teeth (320) are connected to a switching baffle (250); and the polymer nozzle (330) is connected to the upper ends of the front-row modular rake teeth (310) and the rear-row modular rake teeth (320).

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