A low-disturbance synchronous material-taking grab structure for dredging of bituminous sand

Abstract

The present application relates to the technical field of bituminous sand dredging equipment, more particularly to a low-disturbance synchronous material-taking grab structure for bituminous sand dredging, comprising two symmetrical tongs, the upper ends of the two tongs are fixed with connecting plates, one end of the connecting plate is rotatably connected with a synchronous closing assembly through a connecting rod, the other end of the connecting plate is rotatably connected with the lower end of the synchronous closing assembly, the front edge of the grab opening of the tong is subjected to a blunting treatment, which avoids excessive cutting and agitation when the tong is inserted into the bituminous sand layer, prevents oil from being separated in advance in the bituminous sand layer, and protects the surrounding ecological environment, an oil-repellent layer is brushed on the inner side of the tong, which effectively reduces the adhesion between the bituminous sand and the metal surface, ensures clean and complete unloading, reduces the cleaning work intensity, and an elastic sealing strip is arranged at the closed connection of the two tongs, which fills the gap through elastic deformation when the tongs are closed, forms a reliable closed space, and effectively prevents the leakage of small bituminous sand particles and oil-containing sewage in the lifting and transportation process.

Description

Technical Field

[0001] This invention relates to the field of equipment technology for dredging equipment containing asphalt sand, and more specifically, to a low-disturbance synchronous material grab structure for dredging asphalt sand. Background Technology

[0002] Dredging is a crucial means of maintaining unobstructed waterways, facilitating port construction, and managing the aquatic environment. Grab dredgers are widely used in dredging operations due to their maneuverability and adaptability. However, when dredging waters containing special materials such as asphalt sand, existing conventional grab structures have numerous technical shortcomings, making it difficult to meet the requirements of efficient, environmentally friendly, and safe operations.

[0003] First, asphalt sand has high adhesion and oil content. Traditional grab buckets lack anti-sticking treatment on the inner wall, and material easily adheres to the inside of the grab claws after operation. This not only leads to incomplete unloading and affects the single grab volume, but also increases the difficulty and workload of subsequent cleaning.

[0004] Secondly, the sealing performance of existing grab buckets is insufficient. During the closing and lifting process of the grab bucket, gaps often exist at the connection of the claws. Fine asphalt sand particles or oily wastewater can easily leak from these gaps, causing secondary pollution. This leakage is unacceptable, especially in waters where environmental protection requirements are becoming increasingly stringent.

[0005] Secondly, safety needs improvement. Most grab buckets rely on hydraulic systems to maintain a closed state. If pressure fluctuations or malfunctions occur in the hydraulic system during lifting and transfer, the grab bucket may unexpectedly open, causing material to fall out. This not only causes material loss and water pollution, but may also pose a safety hazard to equipment or personnel below.

[0006] Furthermore, when traditional grab buckets enter the water, the edges of the bucket opening are usually quite sharp, which can easily cause excessive disturbance to the bottom sediment, leading to a sharp increase in water turbidity, affecting visibility and the surrounding ecological environment. At the same time, existing grab buckets have limited functionality, cannot flexibly adjust the sealing or filtration mode according to the moisture content of the material, and lack an effective automatic cleaning mechanism during operation intervals, making it difficult to ensure the continuous and efficient operation of the equipment.

[0007] Therefore, developing a low-disturbance synchronous material grab structure for dredging asphalt sand that can effectively prevent material adhesion, has good sealing performance, has a safety mechanism to prevent falling off, is low-disturbance and easy to clean has become an urgent technical problem to be solved in the field of dredging equipment technology. Summary of the Invention

[0008] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0009] To at least partially solve the above problems, the present invention provides a low-disturbance synchronous grab structure for dredging asphalt sand, comprising two symmetrically arranged grabs, an elastic sealing strip at the closed connection of the two grabs, an oil-repellent layer brushed on the inner side of the grabs, a blunt treatment on the leading edge of the grab opening, and a connecting plate fixed to the upper end of each grab. One end of the connecting plate is rotatably connected to the synchronous closing assembly via a connecting rod, and the other end of the connecting plate is rotatably connected to the lower end of the synchronous closing assembly.

[0010] Furthermore, the outer side of the bucket claw is provided with a groove, and an inner baffle is engaged in the groove. The inner baffle is fixed to the bucket claw by a screw. A sealing ring is provided between the inner baffle and the inner wall of the groove. The inner baffle is provided with multiple filter holes.

[0011] Furthermore, the outer side of the bucket claw is provided with a second groove, and an outer baffle is snapped into the second groove. The outer baffle is fixed to the bucket claw by a second screw. A second sealing ring is provided between the outer baffle and the inner wall of the second groove. The outer baffle is tightly attached to the outer side of the inner baffle. The elastic sealing strip is a U-shaped sealing strip.

[0012] Furthermore, the synchronous closing assembly includes a lifting plate, two sets of connecting plates are rotatably connected to the lifting plate, a lifting rod is fixed at the upper end of the lifting plate, the lifting rod is slidably connected to the support platform, the support platform is fixedly connected to the lifting lug through the support rod, the lifting lug is fixedly connected to a hydraulic cylinder, the output end of the hydraulic cylinder is connected to the operating rod, the lower end of the operating rod is slidably connected inside the lifting rod, a second spring is provided between the lower end of the operating rod and the lifting rod, and an anti-fall component is provided at the slidable connection between the lifting rod and the support platform.

[0013] Furthermore, the anti-fall-off component includes a right-angle locking block, which slides in a long groove within the support platform. A spring is provided between the inner wall of the long groove and the right-angle locking block. Multiple inverted right-angle locking blocks are provided on the outer side of the lifting rod, and the right-angle locking blocks engage with the inverted right-angle locking blocks.

[0014] Furthermore, the right-angled locking block is fixedly connected to the right-angled locking block via a bent frame, and an inverted triangular locking block is provided on the outside of the operating rod, with the right-angled locking block and the inverted triangular locking block slidably connected.

[0015] Furthermore, a protective cover is provided at the upper end of the support platform, the operating rod is slidably connected to the protective cover, and the support rod is fixedly connected to the protective cover.

[0016] Furthermore, a flushing assembly is slidably connected inside the lifting rod. The flushing assembly includes a hose, one end of which is connected to a water source, and the other end of which is fixed to the upper end of a connecting pipe. The connecting pipe is connected to the output end of the second hydraulic cylinder through a bracket, and the second hydraulic cylinder is fixed to the upper end of the operating rod.

[0017] Furthermore, the connecting pipe is rotatably connected to the upper end of the cleaning pipe, the cleaning pipe slides inside the lifting rod, the cleaning pipe is provided with multiple water outlet holes, the lower end of the cleaning pipe is provided with an end cap, the end cap abuts against the lower end of the lifting rod, and a sealing ring is provided on the contact surface between the end cap and the lifting rod.

[0018] Furthermore, the cleaning pipe is provided with a spiral slide, and the lifting rod is provided with a limiting cylinder, the front end of which is located inside the slide.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This application achieves low-disturbance material handling through two symmetrically arranged bucket claws and their special structural design. The leading edge of the bucket claw inlet is passivated to avoid excessive cutting and agitation of the bottom sediments when inserting into the asphalt sand layer, preventing premature precipitation of the oil phase in the asphalt sand layer and protecting the surrounding ecological environment. At the same time, the inner side of the bucket claw is brushed with an oil-repellent layer, which effectively reduces the adhesion between the asphalt sand and the metal surface, prevents the material from adhering to the inner wall of the bucket claw, ensures clean and thorough unloading, reduces the intensity of cleaning work, and improves the efficiency of a single operation.

[0020] 2. The two claws are equipped with elastic sealing strips at their closing connection, especially the U-shaped sealing strip design. When closed, the elastic deformation fills the gaps, forming a reliable sealed space. This effectively prevents the leakage of fine asphalt sand particles and oily wastewater during lifting and transportation, avoiding secondary pollution. In addition, the outer side of the claws is equipped with removable inner and outer baffles, which users can flexibly adjust according to working conditions. When only the inner baffle is installed, filtration and drainage can be achieved, reducing the lifting load; when both the inner and outer baffles are installed, fully enclosed transportation can be achieved; when both are removed, it is suitable for grabbing large pieces of material. This modular design greatly enhances the adaptability and versatility of the grab bucket.

[0021] 3. This application incorporates a unique anti-fall-off component, including a combination of right-angle locking blocks, inverted right-angle locking blocks, equilateral triangular locking blocks, and inverted triangular locking blocks. During the grab bucket's closing and lifting process, the right-angle and inverted right-angle locking blocks mechanically engage and lock together. Even if the hydraulic system experiences pressure fluctuations or malfunctions, the mechanical locking action can limit the downward movement of the lifting boom, preventing the grab bucket from accidentally opening. The hydraulic cylinder's pulling force and the mechanical engagement together provide double protection, completely eliminating the risk of fully loaded materials falling off and ensuring the safety of personnel and equipment at the work site.

[0022] 4. To address the problem of asphalt sand being easily adhered and difficult to clean, this invention integrates a flushing component. While the cleaning pipe sprays water downwards under the drive of a hydraulic cylinder, it also rotates through the cooperation of a limiting cylinder and a spiral slide, achieving thorough cleaning of the inner wall of the bucket claw without any blind spots. This prevents residual material from affecting the subsequent sealing performance. Simultaneously, a protective cover is provided at the upper end of the support platform to isolate precision components such as the operating lever and anti-fall-off components from the external environment, preventing dust and mud from falling into the gaps between the blocks and causing jamming. This ensures the sensitivity and reliability of the mechanism's operation, extends the equipment's service life, and reduces maintenance costs.

[0023] 5. The synchronous closing components, including the lifting plate, connecting plate, and connecting rod, are designed to ensure the synchronicity of the two grabs during the opening and closing process. This structure makes the grab bucket bear force evenly and close tightly when grabbing materials, avoiding problems such as unstable material clamping or poor sealing caused by asynchrony, and further improving the operational stability and grabbing capacity of the grab bucket.

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the claw structure of the present invention; Figure 4 This is a schematic diagram of the synchronous closing component structure of the present invention. Figure 1 ; Figure 5 This is a schematic diagram of the synchronous closing component structure of the present invention. Figure 2 ; Figure 6 This is a schematic diagram of the synchronous closing component structure of the present invention. Figure 3 ; Figure 7 This is a schematic diagram of the flushing assembly structure of the present invention; Explanation of markings in the diagram: 1. Claw; 2. Outer baffle; 3. Inner baffle; 4. Elastic sealing strip; 5. Connecting plate; 6. Connecting rod; 7. Lifting plate; 8. Lifting rod; 9. Support platform; 10. Protective cover; 11. Spring 1; 12. Right angle locking block; 13. Bending frame; 14. Right angle locking block; 15. Operating rod; 16. Inverted triangle locking block; 17. Spring 2; 18. Hydraulic cylinder 1; 19. Support rod; 20. Lifting lug; 21. Cleaning pipe; 22. Water outlet; 23. Slide rail; 24. End cap; 25. Connecting pipe; 26. Hose; 27. Bracket; 28. Hydraulic cylinder 2; 29. ​​Limiting cylinder; 30. Detailed Implementation

[0026] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] Example 1: As Figures 1-7 As shown, a low-disturbance synchronous grab structure for dredging asphalt sand includes two symmetrically arranged grabs 1. An elastic sealing strip 4 is provided at the closed connection of the two grabs 1. An oil-repellent layer is brushed on the inner side of the grabs 1. The leading edge of the grab mouth of the grabs 1 is blunted. A connecting plate 5 is fixed to the upper end of each of the two grabs 1. One end of the connecting plate 5 is rotatably connected to the synchronous closing assembly through a connecting rod 6. The other end of the connecting plate 5 is rotatably connected to the lower end of the synchronous closing assembly. The working principle of the above technical solution is as follows: During operation, the synchronous closing component is suspended below the dredging equipment. The synchronous closing component drives the two sets of connecting plates 5 to rotate, which in turn drives the two claws 1 to synchronously close towards the center around the connecting rod 6, thereby realizing the grabbing of asphalt sand. The leading edge of the bucket mouth of the bucket 1 is passivated to avoid excessive cutting and agitation of the bottom sediment by the sharp edge when inserting into the asphalt sand layer, thereby reducing the impact of the dredging process on the turbidity of the surrounding water environment and achieving low-disturbance material extraction. The inner side of the bucket claw 1 is pre-coated with an oil-repellent layer. When the bucket claw 1 closes and wraps around the asphalt sand, the coating effectively reduces the adhesion between the asphalt sand and the surface of the metal bucket claw 1, preventing the material from adhering to the inner wall of the bucket claw 1, which could lead to difficulties in unloading or improper closure of the grab bucket. An elastic sealing strip 4 is provided at the closed connection of the two bucket claws 1. Under the action of the closing force, the elastic sealing strip 4 undergoes elastic deformation to fill the gap between the bucket claws 1, forming a sealed space to prevent fine asphalt sand particles or oily sewage from leaking out of the gap during the lifting process, ensuring the cleanliness of the transportation process, realizing low-disturbance grabbing of asphalt sand materials, reducing water pollution, and preventing material adhesion and transportation leakage, thereby improving the environmental protection and efficiency of dredging operations.

[0029] Example 2: Figures 1-7 As shown, the outer side of the claw 1 is provided with a groove, and an inner baffle 3 is snapped into the groove. The inner baffle 3 is fixed to the claw 1 by a screw. A sealing ring is provided between the inner baffle 3 and the inner wall of the groove. The inner baffle 3 is provided with multiple filter holes. The outer side of the claw 1 is provided with a groove 2, and an outer baffle 2 is snapped into the groove 2. The outer baffle 2 is fixed to the claw 1 by screw 2. A sealing ring 2 is provided between the outer baffle 2 and the inner wall of the groove 2. The outer baffle 2 is tightly attached to the outer side of the inner baffle 3. The working principle of the above technical solution is as follows: When both the inner baffle 3 and the outer baffle 2 are installed, the outer baffle 2 is tightly attached to the outer side of the inner baffle 3, and together with the sealing ring 2 between the two and the inner wall of the groove, a double-layer closed structure is formed. In this mode, the grab bucket is completely closed, which is suitable for conveying materials with high moisture content or easy to scatter, and prevents leakage during long-distance transfer. When only the inner baffle 3 is installed and the outer baffle 2 is removed, the filter holes on the inner baffle 3 play a role. During the process of the grab bucket lifting the water out of the water, excess water is discharged through the filter holes, while the asphalt sand is retained in the bucket, realizing the initial dehydration of the material and reducing the lifting load. A sealing ring is provided between the inner baffle 3 and the inner wall of the groove to ensure the sealing of the installation position. When both the inner baffle 3 and the outer baffle 2 are removed, the two ends of the claw 1 are open, which reduces the water flow resistance and is suitable for grabbing large materials or rapid circulation operations where sealing requirements are not high. The outer baffle 2 and inner baffle 3 enhance the adaptability of the grab bucket. By adjusting the baffle configuration, the grab bucket can be adapted to dredged materials with different moisture contents and particle sizes without replacing the entire grab bucket, thus improving the equipment's versatility and operational efficiency.

[0030] Example 3: Figures 1-7 As shown, the elastic sealing strip 4 is a U-shaped sealing strip; The working principle of the above technical solution is as follows: The U-shaped sealing strip is installed at the closed connection of the two claws 1. When the claws 1 are closed, the open end of the U-shaped structure is deformed by pressure, and its two wings form a wider sealing band with the contact surface of the claws 1, which significantly expands the sealing range, improves the reliability of the seal, and effectively prevents the leakage of fine asphalt particles and oil stains. It is especially suitable for water dredging operations with extremely high environmental protection requirements and reduces the risk of secondary pollution.

[0031] Example 4: Figures 1-7As shown, the synchronous closing assembly includes a lifting plate 7, two sets of connecting plates 5 are rotatably connected to the lifting plate 7, a lifting rod 8 is fixed at the upper end of the lifting plate 7, the lifting rod 8 is slidably connected to the support platform 9, the support platform 9 is fixedly connected to the lifting lug 21 through the support rod 20, the lifting lug 21 is fixedly connected to the hydraulic cylinder 19, the output end of the hydraulic cylinder 19 is connected to the operating rod 16, the lower end of the operating rod 16 is slidably connected inside the lifting rod 8, a spring 18 is provided between the lower end of the operating rod 16 and the lifting rod 8, and an anti-fall component is provided at the slidable connection between the lifting rod 8 and the support platform 9; The anti-fall component includes a right-angle locking block 12, which slides in a long groove in the support platform 9. A spring 11 is provided between the inner wall of the long groove and the right-angle locking block 12. Multiple inverted right-angle locking blocks 15 are provided on the outer side of the lifting rod 8. The right-angle locking block 12 is engaged with the inverted right-angle locking block 15. The right-angled block 12 is fixedly connected to the right-angled block 14 via the bent frame 13. An inverted triangle block 17 is provided on the outside of the operating rod 16. The right-angled block 14 and the inverted triangle block 17 are slidably connected. The working principle of the above technical solution is as follows: Hydraulic cylinder 19 is activated, causing operating lever 16 to move downwards. The inverted triangular locking block 17 on the outer side of operating lever 16 moves downwards, squeezing the equilateral triangular locking block 14 to move backwards. Through bending frame 13, the right-angle locking block 12 overcomes the elastic force of spring 11 and contracts inwards, separating and unlocking the right-angle locking block 12 from the inverted right-angle locking block 15 on the outer side of lifting rod 8. At this time, operating lever 16 continues to move downwards, compressing spring 18. Under the restoring elastic force of spring 18, lifting rod 8 is pushed downwards. Lifting rod 8 drives lifting plate 7 downwards, which, through connecting plate 5, causes the two claws 1 to unfold outwards and move above the asphalt sand to prepare for grabbing. After the grabbing is completed, hydraulic cylinder 19 pulls operating lever 16 upward, and inverted triangular block 17 moves past equilateral triangular block 14 and above it. Operating lever 16 drives lifting rod 8 upward. As lifting rod 8 rises, its outer inverted right-angle block 15 re-engages with equilateral right-angle block 12 inside support platform 9. During the lifting and transfer process, even if the hydraulic system experiences pressure fluctuations or malfunctions, the mechanical engagement of the right-angle block 12 and the inverted right-angle block 15 can limit the downward movement of the lifting boom 8, preventing the bucket claw 1 from accidentally opening. The pulling force of the hydraulic cylinder 19 and the mechanical engagement together form a double protection, ensuring the absolute safety of the grab bucket during full-load lifting, eliminating accidents caused by accidental bucket opening leading to asphalt sand falling off, avoiding secondary pollution and equipment damage, and improving operational safety.

[0032] Example 5: Figures 1-7 As shown, the upper end of the support platform 9 is provided with a protective cover 10, the operating rod 16 is slidably connected to the protective cover 10, and the support rod 20 is fixedly connected to the protective cover 10; The working principle of the above technical solution is as follows: The protective cover 10 covers the upper end of the support platform 9, isolating the operating rod 16, the anti-fall assembly including the right-angle locking block 12, the equilateral triangular locking block 14, the curved frame 13, the spring 11, etc., from the external environment. At the dredging operation site, the air often contains a large amount of dust, water vapor, and splashed mud and sand. The protective cover 10 prevents these impurities from falling into the long slots or locking block gaps of the anti-fall assembly. The support rod 20 is fixedly connected to the protective cover 10, which enhances the stability of the overall structure. The operating rod 16 is slidably connected to the protective cover 10, ensuring the guiding accuracy of the movement of the operating rod 16, avoiding the locking block jamming or spring failure caused by the accumulation of debris, ensuring the sensitivity and reliability of the anti-fall assembly, extending the service life of the core transmission components, reducing the maintenance frequency, and reducing the equipment failure rate.

[0033] Example 6: Figures 1-7 As shown, a flushing assembly is slidably connected inside the lifting rod 8. The flushing assembly includes a hose 27, one end of which is connected to a water source, and the other end of which is fixed to the upper end of the connecting pipe 26. The connecting pipe 26 is connected to the output end of the hydraulic cylinder 29 through the bracket 28. The hydraulic cylinder 29 is fixed to the upper end of the operating rod 16. The connecting pipe 26 is rotatably connected to the upper end of the cleaning pipe 22. The cleaning pipe 22 slides inside the lifting rod 8. The cleaning pipe 22 is provided with multiple water outlet holes 23. The lower end of the cleaning pipe 22 is provided with an end cap 25. The end cap 25 abuts against the lower end of the lifting rod 8. A sealing ring is provided on the contact surface between the end cap 25 and the lifting rod 8. The cleaning pipe 22 is provided with a spiral slide 24, and the lifting rod 8 is provided with a limiting cylinder 30, the front end of the limiting cylinder 30 being located inside the slide 24; The working principle of the above technical solution is as follows: During the working interval, hydraulic cylinder 29 is activated to push the connecting pipe 26 downward, which causes the cleaning pipe 22 to slide downward inside the lifting rod 8. Water enters the cleaning pipe 22 through the hose 27 and the connecting pipe 26, and is ejected from the water outlet 23 on the cleaning pipe 22 to directly wash the inner wall of the claw 1. The outer wall of the cleaning pipe 22 is provided with a spiral slide 24, and the lifting rod 8 is provided with a limiting cylinder 30. When the cleaning pipe 22 moves downward under hydraulic drive, the limiting cylinder 30 moves along the spiral slide 24, which forces the cleaning pipe 22 to rotate while moving axially, so as to achieve all-round washing. When the grab bucket is in the closed grabbing state, the cleaning pipe 22 moves upward and resets, the water outlet 23 is hidden inside the lifting rod 8, and the end cap 25 at the lower end of the cleaning pipe 22 presses against the lower end of the lifting rod 8, forming a closed structure with the sealing ring of the contact surface to prevent accidental water leakage and water from rushing into the grabbed asphalt sand. The spiral rotation motion allows the water flow to thoroughly clean every angle of the inner wall of the grab 1, completely removing residual asphalt sand and preventing material accumulation from affecting the closure and sealing of the grab 1. At the same time, the sealed design when the grab is closed prevents accidental water leakage from contaminating the grabbed material or the working water area, improving the equipment's self-cleaning ability and ease of maintenance.

[0034] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A low-disturbance synchronous material taking grab structure for dredging of bituminous sand, characterized in that, It includes two symmetrically arranged bucket claws (1), with an elastic sealing strip (4) at the closed connection of the two bucket claws (1), an oil-repellent layer brushed on the inner side of the bucket claws (1), and the front edge of the bucket mouth of the bucket claws (1) being blunted. A connecting plate (5) is fixed at the upper end of each of the two bucket claws (1). One end of the connecting plate (5) is rotatably connected to the synchronous closing assembly through a connecting rod (6), and the other end of the connecting plate (5) is rotatably connected to the lower end of the synchronous closing assembly.

2. The low-disturbance synchronous grab structure for dredging bituminous sand as described in claim 1, characterized in that, The outer side of the claw (1) is provided with a groove, and an inner baffle (3) is snapped into the groove. The inner baffle (3) is fixed to the claw (1) by a screw. A sealing ring is provided between the inner baffle (3) and the inner wall of the groove. The inner baffle (3) is provided with multiple filter holes.

3. The low-disturbance synchronous grab structure for dredging bituminous sand as described in claim 2, characterized in that, The outer side of the claw (1) is provided with a groove 2, and an outer baffle (2) is snapped into the groove 2. The outer baffle (2) is fixed to the claw (1) by screw 2. A sealing ring 2 is provided between the outer baffle (2) and the inner wall of the groove 2. The outer baffle (2) is tightly attached to the outer side of the inner baffle (3). The elastic sealing strip (4) is a U-shaped sealing strip.

4. The low-disturbance synchronous grab structure for dredging bituminous sand as described in claim 1, characterized in that, The synchronous closing assembly includes a lifting plate (7), two sets of connecting plates (5) are rotatably connected to the lifting plate (7), a lifting rod (8) is fixed at the upper end of the lifting plate (7), the lifting rod (8) is slidably connected to the support platform (9), the support platform (9) is fixedly connected to the lifting lug (21) through the support rod (20), the lifting lug (21) is fixedly connected to the first hydraulic cylinder (19), the output end of the first hydraulic cylinder (19) is connected to the operating rod (16), the lower end of the operating rod (16) is slidably connected inside the lifting rod (8), a second spring (18) is provided between the lower end of the operating rod (16) and the lifting rod (8), and an anti-fall component is provided at the sliding connection between the lifting rod (8) and the support platform (9).

5. The low-disturbance synchronous grab structure for dredging bituminous sand as described in claim 4, characterized in that, The anti-fall component includes a right-angle locking block (12), which slides in a long groove in the support platform (9). A spring (11) is provided between the inner wall of the long groove and the right-angle locking block (12). Multiple inverted right-angle locking blocks (15) are provided on the outside of the lifting rod (8). The right-angle locking block (12) and the inverted right-angle locking block (15) are engaged.

6. A low-disturbance synchronous grab structure for dredging bituminous sand as described in claim 5, characterized in that, The right-angled locking block (12) is fixedly connected to the right-angled locking block (14) through the bending frame (13), and the outside of the operating rod (16) is provided with an inverted triangle locking block (17), and the right-angled locking block (14) and the inverted triangle locking block (17) are slidably connected.

7. A low-disturbance synchronous grab bucket structure for dredging bituminous sand as described in claim 6, characterized in that, The upper end of the support platform (9) is provided with a protective cover (10), the operating rod (16) is slidably connected to the protective cover (10), and the support rod (20) is fixedly connected to the protective cover (10).

8. A low-disturbance synchronous grab bucket structure for dredging bituminous sand as described in claim 7, characterized in that, The lifting rod (8) is slidably connected to a flushing assembly, which includes a hose (27). One end of the hose (27) is connected to a water source, and the other end of the hose (27) is fixed to the upper end of the connecting pipe (26). The connecting pipe (26) is connected to the output end of the second hydraulic cylinder (29) through a bracket (28). The second hydraulic cylinder (29) is fixed to the upper end of the operating rod (16).

9. A low-disturbance synchronous grab bucket structure for dredging bituminous sand as described in claim 8, characterized in that, The connecting pipe (26) is rotatably connected to the upper end of the cleaning pipe (22). The cleaning pipe (22) slides inside the lifting rod (8). The cleaning pipe (22) is provided with multiple water outlet holes (23). The lower end of the cleaning pipe (22) is provided with an end cap (25). The end cap (25) abuts against the lower end of the lifting rod (8). The contact surface between the end cap (25) and the lifting rod (8) is provided with a sealing ring.

10. A low-disturbance synchronous grab bucket structure for dredging bituminous sand as described in claim 9, characterized in that, The cleaning pipe (22) is provided with a spiral slide (24), and the lifting rod (8) is provided with a limiting cylinder (30), the front end of the limiting cylinder (30) is located in the slide (24).

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