Underwater disc leveler

Abstract

The utility model discloses an underwater disc leveler which comprises a pull rod, a first cutting disc group, a second cutting disc group, a protective telescopic connecting rod assembly and a leveling roller group, the rear end of the pull rod is hinged with the first cutting disc group, and the first cutting disc group is connected with the second cutting disc group through the protective telescopic connecting rod assembly. The second cutting disc group is fixedly connected with the leveling roller group; each cutting disc group comprises a plurality of discs mounted on a transverse sleeve rod of the cutting disc group; the protection telescopic connecting rod assembly is located between the first cutting disc set and the second cutting disc set, and the first cutting disc set is controlled to steer within a certain range after being stressed through stretching out and drawing back. Longitudinal shear stress can be generated on a soil body to loosen a shallow-point soil layer, horsepower generated when a ship drags is reduced, energy is saved, and the shallow-sweeping working quality and working efficiency are enhanced by being matched with a rear roller set to work in a combined mode. And the risk of deformation and damage of the leveler is effectively avoided.

Description

Technical Field

[0001] This utility model belongs to the technical field of underwater levelers, and in particular relates to an underwater disc leveler. Background Technology

[0002] In the later stages of waterway dredging, various scattered furrows, shallow embankments, shallow areas, and shallow points exist in the construction area due to differences in soil properties and density, vessel type construction characteristics, and manual operation. Traditional dredging methods using dredgers are inefficient, have long vessel occupancy periods, high operating costs, and unsatisfactory shoveling results. Therefore, underwater leveling devices are often used for shoveling at the end of waterway projects.

[0003] The underwater leveler, also known as a rake leveler, is a special steel truss structure. Steel shovels and scrapers or shovel teeth are installed on the bottom of the rake, which is suspended from the stern of a self-propelled vessel by steel cables. It features a simple structure, ease of use, and low cost. During operation, the leveler utilizes the drag force generated by the forward movement of tugboats or barges. This drag force is transferred to the leveler via tow cables. When the leveler encounters obstacles such as shallow mud spots, it uses its own weight and the cutting and breaking ability of the front scraper (or blade) to remove the shallow areas and spots. The rear scraper then fills the shallow soil through the mud outlet channel to the deeper areas, leveling and smoothing the mud, thus achieving the dual functions of removing shallow spots and breaking and leveling the soil.

[0004] The leveler is connected by slings and uses its own weight to make close contact with the channel bed. It relies on the towing cables of tugboats or suction dredgers to provide horizontal towing force to pull the leveler forward. When it encounters furrows or shallow spots, the rake teeth installed at the front of the leveler can penetrate into the soil layer to loosen it, and the rollers or scrapers installed at the rear will flatten the loosened soil layer and scrape it into deep furrows or other areas for sweeping and leveling.

[0005] Most underwater levelers currently use a horizontal cutting method to loosen the soil layer before leveling and compacting it. However, when encountering hard soil piles or rocks, or when stuck in deep pits, it is often difficult to continue dragging forward, and in severe cases, it may even lead to the risk of the leveler falling off, deforming, or breaking. Utility Model Content

[0006] To address the problems existing in the prior art, this utility model proposes an underwater disc leveler. This underwater disc leveler can adapt to working conditions with hard soil or deep pits. During operation, it can cut longitudinally to avoid sinking into deep pits and has a self-protection function to prevent deformation and breakage.

[0007] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0008] An underwater disc leveler includes a pull rod, a first cutting disc assembly, a second cutting disc assembly, a protective telescopic linkage assembly, and a leveling roller assembly. The pull rod has a pull ring at its front end and is hinged to the first cutting disc assembly at its rear end. The first cutting disc assembly is connected to the second cutting disc assembly via the protective telescopic linkage assembly, and the second cutting disc assembly is fixedly connected to the leveling roller assembly. Each cutting disc assembly includes several discs mounted on its transverse sleeve, and the discs roll forward with the ship's direction of travel. The protective telescopic linkage assembly is located between the corresponding transverse sleeves of the first and second cutting disc assemblies, and its extension and retraction control allows the first cutting disc assembly to steer within a certain range after being subjected to force.

[0009] In the above technical solution, preferably, the protective telescopic link includes a telescopic rod, a first fixed rod, a second fixed rod, a connecting rod, a first limiting frame, and a limiting post. One end of the telescopic rod is hinged to the transverse sleeve of the first cutting disc assembly, and the other end is fixedly connected to the transverse sleeve of the second cutting disc assembly. The first fixed rod is fixed to the transverse sleeve of the first cutting disc assembly, and the second fixed rod is fixed to the transverse sleeve of the second cutting disc assembly. The first fixed rod and the second fixed rod are hinged together. The first limiting frame and the limiting post are fixed to the transverse sleeve of the first cutting disc assembly. One end of the connecting rod is hinged to the second fixed rod, and the other end passes through the first limiting frame. The limiting post is located outside the first limiting frame and is used to limit the angle between the connecting rod and the second fixed rod to be too small, so that the first cutting disc assembly will not collide with the second cutting disc assembly after turning.

[0010] In the above technical solution, a second limiting frame is further provided on the transverse sleeve of the first cutting disc assembly, and the telescopic rod passes through the second limiting frame and is hinged to the transverse sleeve of the first cutting disc assembly.

[0011] In the above technical solution, preferably, each cutting disc assembly has a scraper blade installed on its transverse sleeve, which is paired with the disc above it and used to scrape off the mud on the disc.

[0012] In the above technical solution, preferably, the disks on each cutting disk group are arc-shaped disks with a certain inclination angle, and the disks on the two cutting disk groups face opposite directions.

[0013] In the above technical solution, preferably, a retractable foot support is installed in the middle of the pull rod.

[0014] In the above technical solution, preferably, the leveling roller assembly includes a supporting steel frame and rollers that can roll back and forth and are mounted on the supporting steel frame.

[0015] In the above technical solution, preferably, a lifting ring for connecting to the sling of the towing vessel is installed above the middle part of the underwater disc leveler.

[0016] This invention employs a disc cutting mechanism instead of the traditional rake-tooth cutting method, achieving the desired effect of loosening the soil while significantly reducing the towing force of the vessel. It also adapts to more complex working environments, making shallow-water shoveling more efficient. When the underwater disc leveler encounters large rocks, hard soil mounds, or gets stuck in a deep pit, even if the vessel stops in time, the inertial force generated by the vessel will continue to pull the leveler. At this time, the protective telescopic linkage assembly protects the leveler from deformation and damage due to excessive resistance.

[0017] In addition, to prevent excessive mud from adhering to the discs during rolling, which could cause wheel jamming or excessive weight of the underwater leveler and thus affect the efficiency of shallow water clearing, a mud scraper is installed near each disc to scrape off the adhering mud as the discs roll forward.

[0018] Compared with the prior art, the advantages and positive effects of this utility model are:

[0019] First, this utility model is an underwater disc leveler that can longitudinally cut the soil and has a deformation and fracture protection mechanism. It improves the shortcomings of some existing underwater levelers in some special working environments, has high shallow leveling efficiency and improves equipment life.

[0020] Secondly, the discs on the two cutting disc assemblies of this utility model can generate longitudinal shear stress on the soil to loosen shallow soil layers, making it easy to move and reducing the horsepower required for towing by ships, thus saving energy. When working together with the roller assembly behind it, it enhances the quality and efficiency of shallow soil clearing. The protective telescopic linkage assembly effectively protects the leveler from deformation and damage, serving as a solid safety barrier. Attached Figure Description

[0021] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0022] Figure 1 A schematic diagram of the overall structure of the underwater disc leveler provided in this embodiment of the utility model. Figure 1 ;

[0023] Figure 2 A schematic diagram of the overall structure of the underwater disc leveler provided in this embodiment of the utility model. Figure 2 ;

[0024] Figure 3 A schematic diagram of the overall structure of the underwater disc leveler provided in this embodiment of the utility model. Figure 3 ;

[0025] Figure 4A front view of the second cutting disk assembly provided in an embodiment of this utility model;

[0026] Figure 5 for Figure 3 A schematic diagram of the foot support structure in section A;

[0027] Figure 6 This is a schematic diagram of the leveling roller assembly provided in an embodiment of the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Pull ring; 2. Foot support; 2-1. Support tube; 2-2. Support rod; 2-3. Connecting pin; 3. Pull rod; 4. First cutting disc assembly; 5. Second cutting disc assembly; 5-1. Disc; 5-2. Scraper; 5-3. Horizontal sleeve rod; 6. Protective telescopic connecting rod assembly; 6-1. Telescopic rod; 6-2. Fixed rod one; 6-3. Fixed rod two; 6-4. Connecting rod; 6-5. First limiting frame; 6-6. Limiting post; 6-7. Second limiting frame; 7. Leveling roller assembly; 7-1. Roller; 7-2. T-shaped steel frame; 7-3. Fasteners; 8. Lifting ring. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0031] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] like Figures 1 to 6 As shown, an underwater disc leveler includes a pull rod 3, a first cutting disc assembly 4, a second cutting disc assembly 5, a protective telescopic connecting rod assembly 6, and a leveling roller assembly 7. The pull rod 3 has a pull ring 1 at its front end, and its rear end is hinged to the front end of the first cutting disc assembly 4. The rear end of the first cutting disc assembly 4 is connected to the front end of the second cutting disc assembly 5 via the protective telescopic connecting rod assembly 6. The rear end of the second cutting disc assembly 5 is fixedly connected to the leveling roller assembly 7. Each cutting disc assembly includes several discs 5-1 mounted on its transverse sleeve, and the discs 5-1 roll forward with the ship's navigation direction. The protective telescopic connecting rod assembly 6 is located between the corresponding transverse sleeves 5-3 of the first and second cutting disc assemblies 4 and 5, respectively. The extension and retraction of the protective telescopic connecting rod assembly 6 controls the first cutting disc assembly 4 to change direction within a certain range after being subjected to force.

[0035] Pull ring 1 is installed at the front end of pull rod 3. Pull ring 1 is responsible for connecting to the towing cable of the towing vessel. Pull ring 1 is towed forward by the vessel while attached to the towing cable. The rear end of pull rod 3 is connected to the first cutting disc assembly 4, which drags the entire underwater leveler.

[0036] The pull rod 3 is hinged to the transverse sleeves of the first cutting disc assembly 4 on both sides of its rear end, so that when the pull rod 3 is lifted by the tow rope, the cutting disc assembly will not be lifted as well, allowing for a degree of rotational freedom in the vertical direction. The first cutting disc assembly 4 is connected to the second cutting disc assembly 5 at the top, together responsible for the underwater leveling device to cut and loosen the shallow soil layer; the two cutting disc assemblies are connected by a protective telescopic linkage assembly 6, allowing the first cutting disc assembly 4 to rotate within a certain range.

[0037] Each cutting disc assembly includes several discs 5-1 and a transverse sleeve 5-3. The discs 5-1 are mounted on the transverse sleeve 5-3. The discs 5-1 can roll forward with the direction of the ship's navigation. During the forward movement, they can cut and loosen the underwater soil layer in the shallow working area, generating longitudinal shear force on the soil, thereby achieving the effect of loosening and decomposing the soil layer.

[0038] The protective telescopic linkage assembly 6 is located between the corresponding transverse sleeves 5-3 of the first cutting disc assembly 4 and the second cutting disc assembly 5. When there are large rocks, hard soil piles, or the vessel is stuck in a deep pit in front of the first cutting disc assembly 4, the drag force generated by the continued movement of the vessel becomes too large. The protective telescopic linkage assembly 6 will extend and retract to turn the first cutting disc assembly 4, avoiding the risk of the underwater leveler falling off, deforming, or breaking. The leveling roller assembly 7 is connected behind the second cutting disc assembly 5. The leveling roller assembly 7 uses its own weight to compact and level the soil layer loosened by the cutting disc assembly.

[0039] In a preferred embodiment, the protective telescopic linkage assembly 6 includes a telescopic rod 6-1, a first fixing rod 6-2, a second fixing rod 6-3, a connecting rod 6-4, a first limiting frame 6-5, and a limiting post 6-6. One end of the telescopic rod 6-1 is hinged to the transverse sleeve of the first cutting disc assembly 4, and the other end is fixedly connected to the transverse sleeve of the second cutting disc assembly 5. The first fixing rod 6-2 is fixed to the transverse sleeve of the first cutting disc assembly 4, and the second fixing rod 6-3 is fixed to the transverse sleeve of the second cutting disc assembly 5. On the sleeve rod, fixed rod 1 6-2 is hinged to fixed rod 2 6-3; the first limiting frame 6-5 and the limiting post 6-6 are fixed to the transverse sleeve rod of the first cutting disc assembly 4; one end of the connecting rod 6-4 is hinged to fixed rod 2 6-3, and the other end passes through the first limiting frame 6-5. The limiting post 6-6 is located outside the first limiting frame 6-5. The limiting post 6-6 is used to limit the included angle between the connecting rod 6-4 and fixed rod 2 6-3 from being too small, so that the first cutting disc assembly 4 will not collide with the second cutting disc assembly 5 after turning.

[0040] Specifically, a protective telescopic linkage assembly 6 is installed between the first cutting disc assembly 4 and the second cutting disc assembly 5. When there is a large rock, hard soil pile, or the first cutting disc assembly 4 is stuck in a deep pit in front of it, it will be subjected to force, which will cause the protective telescopic linkage assembly 6 to extend and deform, thus playing a protective role. Originally, the two rows of cutting disc assemblies are parallel when moving straight. When the first cutting disc assembly 4 is subjected to force on one side, they are no longer parallel. Along the forward direction of the leveler, when the left side of the first cutting disc assembly 4 is subjected to force, the first cutting disc assembly 4 rotates counterclockwise, the telescopic rod 6-1 extends, and the angle between the connecting rod 6-4 and the fixed rod 6-3 decreases; similarly, when the right side of the first cutting disc assembly 4 is subjected to force, the first cutting disc assembly 4 rotates clockwise, the telescopic rod 6-1 retracts, and the angle between the connecting rod 6-4 and the fixed rod 6-3 increases. The range of variation of the included angle between connecting rod 6-4 and fixed rod 6-3 is constrained by the first limiting frame 6-5. When the first cutting disc assembly 4 rotates to the point where connecting rod 6-4 contacts both sides of the first limiting frame 6-5, it stops rotating. Furthermore, when the included angle between connecting rod 6-4 and fixed rod 6-3 decreases to the point where connecting rod 6-4 abuts against limiting post 6-6, the first cutting disc assembly 4 also stops rotating. This avoids the problem of the leveler deforming or breaking due to excessive force when encountering significant forward resistance.

[0041] In a preferred embodiment, a second limiting frame 6-7 is further provided on the transverse sleeve of the first cutting disc assembly 4, and the telescopic rod 6-1 passes through the second limiting frame 6-7 and is hinged to the transverse sleeve of the first cutting disc assembly 4. When the first cutting disc assembly 4 rotates, it is constrained by both the first limiting frame 6-5 and the second limiting frame 6-7. When the first cutting disc assembly 4 rotates to the point where the telescopic rod 6-1 contacts both sides of the second limiting frame 6-7, it will stop rotating.

[0042] As a preferred implementation method, such as Figure 4 As shown, each cutting disc assembly has a scraper 5-2 installed on its transverse sleeve 5-3, which is paired with the disc 5-1 above it. This scraper is used to remove the dirt from the disc 5-1, preventing the disc from sticking with too much dirt during the rolling process, which could cause problems such as wheel jamming or excessive weight.

[0043] Specifically, each disc 5-1 is equipped with a scraper 5-2 installed on the horizontal sleeve 5-3, which scrapes off the mud clumps attached to the disc 5-1.

[0044] As a preferred embodiment, the disk 5-1 on each cutting disk group is an arc-shaped disk with a certain tilt angle. The disks on the two cutting disk groups face opposite directions, which can effectively control the asymmetrical lateral movement of the disks and ensure smooth operation.

[0045] Specifically, the disc 5-1 is set as an arc-shaped disc with a certain tilt angle, and correspondingly, the scraper 5-2 is set as a scraper with a certain curvature. The curvature of the scraper is the same as that of the arc-shaped disc, ensuring that the mud attached to the disc is scraped off smoothly.

[0046] In a preferred embodiment, the middle of the pull rod 3 is equipped with a retractable foot support 2, which bears the weight of the cutting disc and enables the underwater leveler to maintain stability on land.

[0047] Specifically, a foot support 2 is installed at the middle position on the side of the pull rod 3, such as... Figure 5 As shown, the foot support 2 comprises a support tube 2-1, a support rod 2-2, and a connecting pin 2-3. The support tube 2-1 is mounted on the pull rod 3, and a through hole for the connecting pin 2-3 to pass through is provided on the support tube 2-1. The upper and lower parts of the support rod 2-2 also have through holes for the connecting pin 2-3 to pass through. When the connecting pin 2-3 passes through the through holes in the upper parts of the support tube 2-1 and the support rod 2-2, the foot support 2 is lowered; when the connecting pin 2-3 passes through the through holes in the lower parts of the support tube 2-1 and the support rod 2-2, the foot support 2 is retracted.

[0048] In a preferred embodiment, the leveling roller assembly 7 includes a supporting steel frame and a roller 7-1 mounted on the supporting steel frame that can roll back and forth. The roller 7-1 can roll forward under the dragging action of the underwater leveler to complete the underwater leveling work.

[0049] Specifically, such as Figure 6 As shown, the leveling roller assembly 7 is responsible for compacting and leveling the soil layer after it has been loosened by the underwater leveler. The supporting steel frame of the leveling roller assembly 7 is a T-shaped steel frame 7-2, and three rollers 7-1 are installed. The longitudinal bar of the T-shaped steel frame is connected to the second cutting disc assembly 5. The three rollers 7-1 are installed on the crossbar of the T-shaped steel frame 7-2 with fasteners 7-3. The rollers 7-1 can roll forward under the dragging action of the underwater leveler, and rely on their own gravity to perform underwater leveling work on the soil layer loosened by the cutting disc assembly.

[0050] In a preferred embodiment, a lifting ring is installed above the center of the underwater disc leveler for connection with the slings of the towing vessel, facilitating the lifting of the leveler.

[0051] Specifically, the lifting ring is installed on the outer rod of the telescopic rod 6-1 between the first cutting disc group 4 and the second cutting disc group 5, and is used to connect with the sling of the towing vessel to facilitate the lifting of the leveling device.

[0052] The working principle of this underwater disc leveler is as follows:

[0053] When this underwater disc leveler is in use, the foot support 2 is retracted, and the towing cable carried by the vessel is attached to the pull ring 1 at the front of the underwater disc leveler. The sling carried by the vessel is attached to the sling above the underwater disc leveler, together controlling the towing of the underwater disc leveler to complete the shallowing and leveling work. As the vessel moves forward, the discs on the cutting disc assembly roll in the direction the vessel is towing, and the leveler's own weight exerts longitudinal shear force on the soil layer at the bottom of the water to loosen it. During the rolling process, the clay and other materials attached to the discs are blocked and dislodged by the scraper plates next to the discs. Then, the leveling roller assembly 7 at the rear of the leveler performs leveling and compaction work on the loosened soil, completing the shallowing work of the dredging project.

[0054] During the operation of this underwater disc leveler, it may encounter large rocks, hard soil piles, or get stuck in deep pits. At this time, the leveler will encounter huge forward resistance. The drag force of the ship and the excessive resistance will drive the movement of the protective telescopic linkage assembly 6. For example, when the forward movement is blocked to the left front, the protective telescopic linkage assembly 6 will extend and deform to make the first cutting disc assembly 4 rotate to the left; when the forward movement is blocked to the right front, the protective telescopic linkage assembly 6 will extend and deform to make the first cutting disc assembly 4 rotate to the right, thus relieving the inertial drag force that is resisting the forward resistance and avoiding the problem of deformation or breakage of the underwater leveler due to excessive force.

[0055] The design of this underwater disc leveler enables shallow water clearing operations to cope with more challenging underwater environments, saving time and effort while reducing the likelihood of damage to the underwater leveler and reducing recycling costs.

[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An underwater disc leveler, characterized in that: The system includes a tie rod, a first cutting disc assembly, a second cutting disc assembly, a protective telescopic linkage assembly, and a leveling roller assembly. The tie rod has a pull ring at its front end and is hinged to the first cutting disc assembly at its rear end. The first cutting disc assembly is connected to the second cutting disc assembly via the protective telescopic linkage assembly, and the second cutting disc assembly is fixedly connected to the leveling roller assembly. Each cutting disc assembly includes several discs mounted on its transverse sleeve, which roll forward with the ship's direction of travel. The protective telescopic linkage assembly is located between the corresponding transverse sleeves of the first and second cutting disc assemblies. Its extension and retraction control allows the first cutting disc assembly to steer within a certain range after being subjected to force.

2. The underwater disc leveler according to claim 1, characterized in that: The protective telescopic link includes a telescopic rod, a first fixed rod, a second fixed rod, a connecting rod, a first limiting frame, and a limiting post. One end of the telescopic rod is hinged to the transverse sleeve of the first cutting disc assembly, and the other end is fixedly connected to the transverse sleeve of the second cutting disc assembly. The first fixed rod is fixed to the transverse sleeve of the first cutting disc assembly, and the second fixed rod is fixed to the transverse sleeve of the second cutting disc assembly. The first fixed rod and the second fixed rod are hinged together. The first limiting frame and the limiting post are fixed to the transverse sleeve of the first cutting disc assembly. One end of the connecting rod is hinged to the second fixed rod, and the other end passes through the first limiting frame. The limiting post is located outside the first limiting frame and is used to limit the angle between the connecting rod and the second fixed rod to be too small, so that the first cutting disc assembly will not collide with the second cutting disc assembly after turning.

3. The underwater disc leveler according to claim 2, characterized in that: A second limiting frame is also provided on the transverse sleeve of the first cutting disc assembly, and the telescopic rod passes through the second limiting frame and is hinged to the transverse sleeve of the first cutting disc assembly.

4. The underwater disc leveler according to claim 1, characterized in that: Each cutting disc assembly has a scraper blade mounted on its transverse sleeve, paired with the disc above it, used to scrape off the dirt from the disc.

5. The underwater disc leveler according to claim 1, characterized in that: The disks in each cutting disk group are arc-shaped disks with a certain angle, and the disks in the two cutting disk groups face opposite directions.

6. The underwater disc leveler according to claim 1, characterized in that: The pull rod is equipped with a retractable foot support in the middle.

7. The underwater disc leveler according to claim 1, characterized in that: The leveling roller assembly includes a supporting steel frame and rollers mounted on the supporting steel frame that can roll back and forth.

8. The underwater disc leveler according to claim 1, characterized in that: The underwater disc leveler has a lifting ring installed above the center for connecting to the slings of the towing vessel.

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