A material lifting device for river dredging

Abstract

This utility model discloses a material lifting device for river dredging, including a base plate. A vertical plate is fixedly connected to one side of the top of the base plate, and a lever-based force-saving mechanism is provided on the other side of the top of the base plate. A horizontal plate is fixedly connected to the upper end of one side of the vertical plate, and a first fixed pulley group is fixedly connected to the bottom side of the horizontal plate. A traction rope is connected between the first fixed pulley group, the movable pulley group, and the second fixed pulley group and the traction rope. This utility model forms a pulley transmission structure through the first fixed pulley group, the movable pulley group, the second fixed pulley group, and the traction rope. The movable pulley group bears part of the weight to save effort, and the fixed pulley group changes the direction of the force to make the power transmission smoother. The lever-based force-saving mechanism is formed by a bracket, a movable plate, and a lifting plate. The initial force is reduced by the design that the power arm is larger than the resistance arm. The adjustment mechanism is formed by a motor, an external threaded rod, and an internal threaded sleeve, which can extend the power arm to further save effort.

Description

Technical Field

[0001] This utility model relates to the field of river cleaning technology, specifically to a material lifting device for river cleaning. Background Technology

[0002] Against the backdrop of accelerating urbanization, rivers, as a vital component of urban ecosystems and the water cycle, directly impact the quality of life for residents and the regional ecological balance. However, with the discharge of industrial wastewater and domestic sewage, as well as the accumulation of garbage and debris from surface runoff, rivers often accumulate large amounts of silt, branches, plastic waste, and other materials. This not only causes river blockage and impairs flood control and drainage capacity but also leads to eutrophication, mosquito breeding, and damage to the aquatic ecosystem. Therefore, timely cleaning and removal of accumulated materials in rivers has become a crucial aspect of river management and maintenance.

[0003] Currently, the lifting and transfer of materials during river dredging mainly relies on a combination of traditional equipment and manual assistance. Common equipment includes large machinery such as excavators and cranes. Although these machines have strong lifting capabilities, they are bulky and lack flexibility, making them difficult to operate in narrow rivers, shallow areas, or sections of rivers with dense surrounding buildings. Furthermore, the purchase and operation costs of these machines are high, and they consume a lot of energy. For the dredging of small rivers or localized areas, manual labor is still required, using tools such as shovels and baskets to move the materials, which are then lifted to the bank using simple supports or planks. This method is not only labor-intensive but also inefficient. Therefore, we propose a material lifting device that is simple in structure, easy to operate, has significant labor-saving effects, and is suitable for various river environments. Summary of the Invention

[0004] The purpose of this invention is to provide a material lifting device for river cleaning, so as to solve the problems existing in the operation of the existing device.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a material lifting device for river cleaning, comprising a base plate, a vertical plate fixedly connected to one side of the top of the base plate, a lever-saving mechanism provided on the other side of the top of the base plate, a horizontal plate fixedly connected to the upper end of one side of the vertical plate, a first fixed pulley group fixedly connected to one side of the bottom of the horizontal plate, a connecting rope fixedly connected to the center end of the bottom of the horizontal plate, a movable pulley group fixedly connected to the bottom of the connecting rope, mounting frames fixedly connected to both sides of the movable pulley group, a lifting box fixedly connected to the bottom of the mounting frames, and a second fixed pulley group fixedly connected to both sides of the vertical plate below the horizontal plate, wherein a traction rope is connected between the first fixed pulley group, the movable pulley group, and the second fixed pulley group.

[0006] The lever-assisted force-saving mechanism includes a bracket installed on the top of the base plate, with a movable plate hinged to the top of the bracket. One end of the movable plate is fixedly connected to a traction rope, and the other end of the movable plate is slidably connected to a lifting plate via an adjustment mechanism.

[0007] Furthermore, the adjustment mechanism includes a motor installed on one side of the movable plate. The output end of the motor extends into the interior of the movable plate and is fixedly connected to an external threaded rod. The other end of the external threaded rod is threadedly connected to an internal threaded sleeve through a limiting component. A push plate is fixedly connected to one end of the internal threaded sleeve away from the external threaded rod. An extension plate is fixedly connected to the other end of the push plate. The other end of the extension plate extends to the outside of the movable plate and is fixedly connected to a lifting plate.

[0008] Furthermore, the limiting component includes limiting grooves formed on both sides of the inner cavity of the movable plate, a limiting plate is slidably connected inside the limiting groove, and the other end of the limiting plate is fixedly connected to an internal threaded sleeve.

[0009] Furthermore, a rubber sleeve is fixedly connected to the outer surface of the lifting plate.

[0010] Furthermore, the connecting rope is an elastic nylon rope.

[0011] Furthermore, the end of the traction rope furthest from the movable plate passes sequentially through two sets of second fixed pulley groups, a movable pulley group, and a first fixed pulley group, and is wound and connected with the first fixed pulley group.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This utility model utilizes a pulley transmission structure composed of a first fixed pulley group, a movable pulley group, a second fixed pulley group, and a traction rope. The movable pulley group bears part of the weight, thus saving effort, while the fixed pulley group changes the direction of the force, making power transmission smoother. A lever-based effort-saving mechanism is formed by a bracket, a movable plate, and a lifting plate, and the design of the power arm being longer than the resistance arm reduces the initial force. An adjustment mechanism composed of a motor, an external threaded rod, and an internal threaded sleeve extends the power arm to further save effort. A limiting structure composed of a limiting groove and a limiting plate ensures the stable operation of the adjustment mechanism. A connecting rope connects the horizontal plate and the movable pulley group, providing a buffering and protective function, thereby significantly reducing the labor intensity of workers and improving the efficiency of river cleaning and material lifting operations. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the entire utility model;

[0015] Figure 2 This is a front view of the entire structure of this utility model;

[0016] Figure 3This is a schematic diagram of the internal structure of the movable plate in this utility model.

[0017] In the diagram: 1. Base plate; 2. Vertical plate; 3. Horizontal plate; 4. First fixed pulley block; 5. Connecting rope; 6. Movable pulley block; 7. Mounting frame; 8. Lifting box; 9. Second fixed pulley block; 10. Traction rope; 11. Bracket; 12. Movable plate; 13. Lifting plate; 14. Motor; 15. External threaded rod; 16. Internal threaded sleeve; 17. Push plate; 18. Extension plate; 19. Limiting groove; 20. Limiting plate. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Please see Figure 1-3This utility model provides a technical solution: a material lifting device for river dredging, including a base plate 1. The base plate 1 is a basic load-bearing structure, cast from high-strength alloy steel with a thickness of 10mm, which can effectively distribute the overall weight of the device and the impact force generated during operation, ensuring stability even on uneven ground along the riverbank. A vertical plate 2 is welded to one side of the top of the base plate 1. The vertical plate 2 is made of high-manganese steel, which has excellent compressive and deformation resistance. Its height is designed according to the common dredging depth of rivers, which can meet the operational needs of most inland rivers and rural waterways. A horizontal plate 3 is bolted to the upper end of one side of the vertical plate 2. The horizontal plate 3 is made of lightweight alloy material, ensuring structural strength. Meanwhile, the weight of the upper part of the device is reduced. The first fixed pulley group 4 is installed on one side of the bottom of the horizontal plate 3. The pulley body is made of wear-resistant cast iron, and the groove is inlaid with high-molecular polyethylene pads to reduce friction loss when in contact with the traction rope 10. The connecting rope 5 connected to the center end of the bottom of the horizontal plate 3 is an elastic nylon rope. This material not only has good elasticity, which can buffer the instantaneous tension during the lifting process, but also has the characteristics of acid and alkali resistance and corrosion resistance, making it suitable for the humid and impurity-rich environment of the river. The movable pulley group 6 at the bottom of the connecting rope 5 consists of two sets of movable pulleys. The pulley shaft is made of 45# steel with heat treatment, which has a strong load-bearing capacity. The mounting bracket 7 fixed on both sides of the movable pulley group 6 by welding is a U-shaped structure and uses seamless steel pipe. The lifting box 8, welded to the bottom of the mounting frame 7, is made of stainless steel and features a removable filter screen at the bottom to prevent leakage of fine materials and facilitate subsequent cleaning of residual impurities. The volume of the lifting box 8 is optimized to accommodate 50-80 kg of river cleaning materials at a time. The second fixed pulley group 9, located on both sides below the horizontal plate 3, has a precisely calculated installation height, forming a reasonable force triangle structure with the first fixed pulley group 4 and the movable pulley group 6. The pulleys use the same material and manufacturing process as the first fixed pulley group 4 to ensure smooth transmission of the traction rope 10. The traction rope connecting the first fixed pulley group 4, the movable pulley group 6, and the second fixed pulley group 9... 10 is a galvanized steel wire rope with a diameter of 8mm. It has the characteristics of high strength, tensile strength and corrosion resistance. It can bear the total weight of the lifting box 8 and the fully loaded materials. In the lever-saving mechanism, the bracket 11, which is installed on the top of the base plate 1 by anchor bolts, is made of cast steel. The hinge between the top and the movable plate 12 uses a self-lubricating bearing to reduce the frictional resistance when the movable plate 12 rotates. The movable plate 12 is made of high-strength alloy steel plate with a thickness of 8mm. One end of the top is fixedly connected to the traction rope 10 by a rope clamp, and the other end is connected to the lifting plate 13 through the adjustment mechanism. The rubber sleeve wrapped on its outer surface has an anti-slip texture design, which increases the friction when the hand is gripping and relieves hand fatigue caused by long-term operation.

[0020] Furthermore, the adjustment mechanism includes a motor 14 installed on one side of the movable plate 12. The output end of the motor 14 extends into the interior of the movable plate 12 and is fixedly connected to an external threaded rod 15. The other end of the external threaded rod 15 is threadedly connected to an internal threaded sleeve 16 through a limiting component. The end of the internal threaded sleeve 16 away from the external threaded rod 15 is fixedly connected to a push plate 17. The other end of the push plate 17 is fixedly connected to an extension plate 18. The other end of the extension plate 18 extends to the outside of the movable plate 12 and is fixedly connected to a lifting plate 13.

[0021] Among them, motor 14 is a servo motor with an IP65 waterproof rating, which can adapt to the humid working environment along the river. The external threaded rod 15 connected to the output end of motor 14 is made of 40Cr material with chrome plating to improve wear resistance and corrosion resistance. The internal threaded sleeve 16 connected to the external threaded rod 15 is made of ductile iron with an internal thread precision of 6H grade, ensuring smooth fit with the external threaded rod 15. The push plate 17 welded to one end of the internal threaded sleeve 16 is made of Q235 steel plate and is connected to the extension plate 18 by bolts. The extension plate 18 is made of telescopic alloy profile, which can flexibly adjust the position of the lifting plate 13.

[0022] Furthermore, in the limiting assembly, the limiting grooves 19 opened on both sides of the inner cavity of the movable plate 12 are clearance-fitted with the limiting plate 20. The limiting plate 20 is made of wear-resistant steel plate. After being welded and fixed to the internal threaded sleeve 16, it can effectively prevent the internal threaded sleeve 16 from rotating synchronously with the external threaded rod 15, thus ensuring the stable operation of the adjusting mechanism.

[0023] Working Principle: In urban or rural river dredging operations, it is often necessary to dredge silt, garbage, stones, and other materials from the riverbed. Operators first securely place the base plate 1 of this device on the riverbank, then lower the lifting box 8 into the riverbed. Workers below load the materials to be cleaned into the lifting box 8. The lifting box 8 is then lifted upwards. During lifting, workers apply a downward pulling force to the lifting plate 13, which is transmitted to the movable plate 12. The movable plate 12 forms a lever structure with the hinge point at the top of the support 11 as the fulcrum. Since the length of the power arm where the lifting plate 13 is located is greater than the length of the resistance arm at the connection end of the traction rope 10, according to the lever principle, the initial lifting power required can be significantly reduced. After the power is transmitted to the traction rope 10 through the movable plate 12, the traction rope 10 will move along the second fixed pulley group 9, the movable pulley group 6, and the... The transmission is carried out along the path of the fixed pulley block 4. The movable pulley block 6 is rigidly connected to the lifting box 8 through the mounting frame 7. During the lifting process, it will rise together with the lifting box 8. It is a force-saving pulley block. Its force-saving principle is that the movable pulley block 6 has multiple ropes sharing the total weight of the lifting box 8 and the internal materials, so that the tension borne by each traction rope 10 is only a part of the total weight, thereby further reducing the tension on the traction rope 10. It forms a double force-saving effect with the lever mechanism. When it is necessary to adjust the force-saving degree, the motor 14 is started. The output end of the motor 14 drives the external threaded rod 15 to rotate. Under the constraint of the limiting component, the limiting plate 20 slides in the limiting groove 19 to prevent the internal threaded sleeve 16 from rotating synchronously with the external threaded rod 15. The internal threaded sleeve 16 will move axially along the external threaded rod 15, and then push the extension plate 18 and the lifting plate 13 to move away from the fulcrum through the push plate 17. At this point, the distance from the point of application of the power on the lifting plate 13 to the fulcrum is extended. According to the lever balance condition, with the resistance and resistance arm remaining unchanged, the longer the power arm, the less power is required, thus achieving more efficient labor-saving adjustment. In addition, the rubber sleeve on the outer surface of the lifting plate 13 can increase the friction between the hand and the lifting plate 13, making it easier for workers to apply force. The connecting rope 5 is made of elastic nylon rope, which can play a certain buffering role during the lifting process, reducing the risk of damage to various parts of the device due to excessive instantaneous force. Each fixed pulley group mainly plays the role of changing the direction of force and reducing the friction between the traction rope 10 and the device, ensuring smooth and efficient power transmission. Thus, this device can easily cope with the lifting operation of heavier materials in river cleaning through the dual labor-saving effect of the lever labor-saving mechanism and the moving pulley group 6, as well as the flexible adjustment of the power arm by the adjustment mechanism, significantly reducing the labor intensity of workers and improving the efficiency of cleaning work.

[0024] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

Claims

1. A material lifting device for riverway cleaning, comprising a base plate (1), characterized in that: A vertical plate (2) is fixedly connected to one side of the top of the base plate (1), and a lever-saving mechanism is provided on the other side of the top of the base plate (1). A horizontal plate (3) is fixedly connected to the upper end of one side of the vertical plate (2), and a first fixed pulley group (4) is fixedly connected to one side of the bottom of the horizontal plate (3). A connecting rope (5) is fixedly connected to the center end of the bottom of the horizontal plate (3), and a movable pulley group (6) is fixedly connected to the bottom of the connecting rope (5). A mounting frame (7) is fixedly connected to both sides of the movable pulley group (6), and a lifting box (8) is fixedly connected to the bottom of the mounting frame (7). A second fixed pulley group (9) is fixedly connected to both sides of the vertical plate (2) below the horizontal plate (3). A traction rope (10) is connected between the first fixed pulley group (4), the movable pulley group (6), and the second fixed pulley group (9). The lever-assisted mechanism includes a bracket (11) mounted on the top of the base plate (1). A movable plate (12) is hinged to the top of the bracket (11). One end of the movable plate (12) is fixedly connected to the top of the traction rope (10). The other end of the movable plate (12) is slidably connected to a lifting plate (13) through an adjustment mechanism.

2. The material lifting device for riverway cleaning according to claim 1, characterized in that: The adjustment mechanism includes a motor (14) installed on one side of the movable plate (12). The output end of the motor (14) extends into the interior of the movable plate (12) and is fixedly connected to an external threaded rod (15). The other end of the external threaded rod (15) is threadedly connected to an internal threaded sleeve (16) through a limiting component. The end of the internal threaded sleeve (16) away from the external threaded rod (15) is fixedly connected to a push plate (17). The other end of the push plate (17) is fixedly connected to an extension plate (18). The other end of the extension plate (18) extends to the outside of the movable plate (12) and is fixedly connected to a lifting plate (13).

3. A material lifting device for riverway cleanup as defined in claim 2, wherein: The limiting component includes limiting grooves (19) opened on both sides of the inner cavity of the movable plate (12), and a limiting plate (20) is slidably connected inside the limiting grooves (19), and the other end of the limiting plate (20) is fixedly connected to the internal threaded sleeve (16).

4. The material lifting device for riverway cleaning according to claim 1, characterized in that: A rubber sleeve is fixedly connected to the outer surface of the lifting plate (13).

5. The material lifting device for riverway cleaning according to claim 1, characterized in that: The connecting rope (5) is an elastic nylon rope.

6. The material lifting device for riverway cleaning according to claim 1, characterized in that: The end of the traction rope (10) away from the movable plate (12) passes through two sets of second fixed pulley groups (9), movable pulley groups (6) and first fixed pulley groups (4) in sequence, and is wound and connected with the first fixed pulley group (4).

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