Spiral reamer assembly suitable for dredging shallow bottom mud of rivers, lakes and reservoirs

Abstract

A spiral reamer assembly suitable for dredging shallow bottom mud of rivers, lakes and reservoirs comprises a spiral reamer, a driving rotary supporting seat, a driven rotary supporting seat, a driving supporting sleeve and a driven supporting sleeve. The spiral reamer comprises a transmission shaft, a left-handed spiral blade and a right-handed spiral blade, a driving flange and a driven flange are arranged at the two ends of the transmission shaft respectively, the driving flange is connected with a power flange at the end of the driving shaft, and the driven flange is connected with a driven flange at the end of the driven shaft. The driving shaft and the driven shaft are installed on the driving rotary supporting seat and the driven rotary supporting seat through supporting bearings, bearing glands are installed on the inner sides of the driving rotary supporting seat and the driven rotary supporting seat, and sealing assemblies are installed on the bearing glands. The spiral reamer is rapidly replaced and maintained, the whole structural frame does not need to be disassembled, the maintenance cost is greatly reduced, and the maintenance time is greatly shortened; due to the additionally-arranged transverse reinforcing plate and the cutting edge of the transverse reinforcing plate, the hardened mud block treatment capacity of the reamer is enhanced, deformation and damage are reduced, and efficient and stable dredging operation is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of environmental protection dredging engineering, and particularly relates to a spiral cutter head assembly suitable for shallow sediment dredging in rivers, lakes and reservoirs. Background Art

[0002] In the environmental protection dredging projects of waters such as rivers, lakes and reservoirs, the dredging operation of shallow sediment is one of the important measures to maintain water quality and improve the ecological environment. As a key device for performing such tasks, the dredger, and its core component - the spiral cutter head assembly, plays a crucial role in the dredging process. The spiral cutter head assembly rotates and stirs the sediment, and cooperates with the negative pressure system to effectively discharge the slurry, so as to efficiently complete the dredging task.

[0003] However, in the actual use process, the spiral cutter head assembly often faces two prominent problems: one is that the spiral cutter head is prone to deformation under the long-term and high-intensity working environment. This deformation not only reduces the dredging efficiency, but also may cause unnecessary wear and damage to other components of the dredger, increasing the maintenance cost and downtime. The other is that the cutting and crushing effect of the spiral blade is limited for slightly hard soil, and it is unable to effectively cut and crush the slightly hard sediment, resulting in low operation efficiency and poor operation quality.

[0004] Analyzing the reasons in depth, on the one hand, due to the large differences in the physical properties (such as hardness, viscosity, etc.) of the sediment, different acting forces and stresses are generated on the spiral cutter head, and there is a lack of cutting edges on the cutter head end face; on the other hand, the existing connection methods between the spiral cutter head and the driving shaft and the driven shaft mostly adopt key connections, and specific reference can be made to the existing technical drawings ( Figure 4 ); although this connection method is simple, under high-load working conditions, the key is prone to damage, resulting in connection failure. More importantly, when the key is damaged, in order to replace the spiral cutter head, it is usually necessary to disassemble the entire cutter head assembly, which is a complex and cumbersome process, time-consuming, and increases additional labor and material costs.

[0005] In view of the above problems, there is an urgent need in the market for a design solution with a cutting function and capable of quickly replacing the spiral cutter head to improve the operation efficiency and maintenance convenience of the dredger. The present utility model is precisely proposed based on this need, aiming to achieve the quick replacement and efficient cutting of the spiral cutter head through innovation in connection and structural forms, so as to effectively solve the deficiencies existing in the prior art. Content of the Utility Model

[0006] Aiming at the problems existing in the prior art, the present utility model provides a spiral cutter head assembly suitable for shallow sediment dredging in rivers, lakes and reservoirs, which realizes the quick replacement of the spiral cutter head.

[0007] The present utility model is realized as follows. A spiral reamer assembly applicable to the dredging of shallow bottom mud in rivers, lakes, and reservoirs. The spiral reamer assembly is installed on a spiral reamer frame through an active support sleeve and a driven support sleeve. The spiral reamer includes a hollow transmission shaft, and left-handed spiral blades and right-handed spiral blades are welded on the transmission shaft. The characteristics are as follows: Active flanges and driven flanges are respectively provided at both ends of the transmission shaft. The active flange is connected to the power flange at the end of the active shaft, and the driven flange is connected to the passive flange at the end of the driven shaft. Transverse reinforcing plates are obliquely installed between adjacent left-handed spiral blades and right-handed spiral blades.

[0008] Preferably, transverse reinforcing plates are obliquely installed between adjacent left-handed spiral blades and right-handed spiral blades.

[0009] Preferably, the included angle between the soil-facing surface of the transverse reinforcing plate and the tangent line at the end of the cutting edge is 36° - 52°.

[0010] Preferably, the thickness of the transverse reinforcing plate is 15 - 25 mm.

[0011] Preferably, a cutting edge is provided at the front end of the transverse reinforcing plate.

[0012] Preferably, the included angle between the soil-facing surface and the soil-backing surface of the cutting edge is 15 - 20 degrees.

[0013] Preferably, the active shaft and the driven shaft are installed on an active slewing support base and a driven slewing support base through support bearings. The active slewing support base and the driven slewing support base are correspondingly connected to the active support sleeve and the driven support sleeve through fasteners. Bearing caps are installed on the active shaft and the driven shaft inside the active slewing support base and the driven slewing support base, and the bearing caps are connected to a sealing assembly.

[0014] The advantages and technical effects of the present utility model: The spiral reamer assembly of the present utility model patent is aimed at the dredging operation of shallow bottom mud in rivers, lakes, and reservoirs, significantly improving the dredging efficiency and maintenance convenience. The design of two sets of positive and negative spiral blades effectively transports and crushes the bottom mud, reducing the risk of blockage. By connecting the transmission shaft to the active and driven shafts through flanges, the rapid replacement and repair of the spiral reamer are realized, without disassembling the entire structural framework, greatly reducing the maintenance cost and time. In addition, the added transverse reinforcing plates and their cutting edges strengthen the ability of the reamer to handle compacted mud blocks, reducing deformation and damage, and ensuring efficient and stable dredging operations. The innovative design of the present utility model not only improves the dredging efficiency but also significantly enhances the adaptability and reliability of the equipment, making it an ideal choice for environmental dredging projects in rivers, lakes, and reservoirs. Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of the present utility model;

[0016] Figure 2It is a schematic diagram of the structure of a spiral reamer;

[0017] Figure 3 is Figure 1 the enlarged view of part I in

[0018] Figure 4 a schematic diagram of the prior art structure.

[0019] In the figure, 1. Spiral reamer frame; 2. Spiral reamer; 2-1. Transmission shaft; 2-2. Left-handed spiral blade; 2-3. Right-handed spiral blade; 2-4. Driving flange; 2-5. Driven flange; 2-6. Driving shaft; 2-7. Power flange; 2-8. Driven shaft; 2-9. Passive flange; 3. Driving slewing support seat; 4. Driven slewing support seat; 5. Transverse reinforcement plate; 5-1. Cutting edge; 6. Driving support sleeve; 7. Driven support sleeve; 8. Bearing gland; 9. Sealing assembly; 9-10. Inner sealing ring; 9-11. Outer sealing ring; 9-12. First sealing member; 9-13. Second sealing member; 9-14. Third sealing assembly; 10. Hydraulic motor; 11. Protective cover. Detailed implementation manners

[0020] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0021] Please refer to Figures 1 to 3, A spiral reamer assembly suitable for dredging shallow bottom mud in rivers, lakes and reservoirs, including a spiral reamer 2, which is installed on a spiral reamer frame 1. The spiral reamer includes a hollow transmission shaft 2-1, and a left-handed spiral blade 2-2 and a right-handed spiral blade 2-3 are welded on the transmission shaft. This design of two sets of positive and negative blades enables the bottom mud to be transported to the center under the rotation of the blades, improving the dredging efficiency. At the same time, the design of the spiral blades can also effectively break the bottom mud, reducing the risk of blockage of the mud suction pipeline by large pieces of bottom mud; both ends of the transmission shaft are respectively provided with a driving flange 2-4 and a driven flange 2-5. The driving flange is used to connect the power flange 2-7 at the end of the driving shaft 2-6, and the other end of the driving shaft is connected to a hydraulic motor 10 that provides the rotational power of the driving shaft. A protective cover 11 is installed outside the hydraulic motor; the driven flange is used to connect the passive flange 2-9 at the end of the driven shaft 2-8. The driving shaft and the driven shaft are respectively installed on a driving slewing support seat 3 and a driven slewing support seat 4 through support bearings 12; a bearing gland 8 is installed inside the driving slewing support seat and the driven slewing support seat, and a sealing component 9 is installed at the bearing gland; compared with the traditional key connection using flange connection, when the spiral reamer needs to be replaced or repaired, only the transmission shaft needs to be disassembled separately to quickly replace the spiral reamer, without disassembling the entire structural framework, greatly improving the maintenance efficiency. At the same time, the independently installed slewing support also enhances the stability of the transmission shaft, ensuring the reliable operation of the machine during long-term operation.

[0022] A transverse reinforcement plate 5 is inclined and installed between the adjacent left-handed spiral blade and right-handed spiral blade, and its installation method is generally welding. The cutting edge end of the transverse reinforcement plate 5 is located on the outer circle of the spiral blade. The addition of the transverse reinforcement plate 5 effectively improves the overall strength of the spiral reamer, enabling it to work more stably when facing hard compacted mud blocks, reducing the risk of deformation and damage.

[0023] Preferably, the included angle between the soil-facing surface of the transverse reinforcement plate and the tangent line of the cutting edge end is 36°-52°.

[0024] Preferably, the transverse reinforcement plate is a high-strength wear-resistant plate with a thickness of 15-25 mm.

[0025] Preferably, a cutting edge 5-1 is provided at the front end of the transverse reinforcement plate; the included angle between the soil-facing surface and the back soil surface of the cutting edge is 15-20 degrees. This innovative design mainly addresses the challenges encountered in the process of treating the bottom mud of rivers, lakes and reservoirs. Generally, the bottom mud of rivers, lakes and reservoirs is relatively soft. Especially when the bottom mud shows a compacted situation, traditional spiral reamers are often difficult to effectively cut the mud blocks, and may even cause the deformation of the spiral reamer, resulting in the blockage of the mud suction port and seriously affecting the dredging efficiency. At the same time, these reinforcement plates also have a certain cutting force, which can help the spiral reamer better cut the mud blocks, ensure that the mud blocks can be smoothly sucked in and processed, thus effectively avoiding the problem of blockage of the mud suction port.

[0026] In the above structure, the sealing component can be a skeleton seal, and a sealing component installation groove is provided inside the bearing gland. The sealing component can also be configured as a mechanical combined sealing component, including a sealing inner ring 9-10, a sealing outer ring 9-11 and a sealing gland 9-15; a first sealing member 9-12 is installed between the sealing inner ring and the driving shaft and the driven shaft; a second sealing member 9-13 and a third sealing member 9-14 are provided between the sealing inner ring and the sealing outer ring.

[0027] In summary, through the multi-sealing structure and the design of integral replaceability, the sealing component achieves excellent sealing performance and an efficient maintenance process. These technical effects act together on the transmission system to ensure its stable, reliable and efficient working state.

[0028] Preferably, the first sealing member is a floating sealing member; the second sealing member is a lip-shaped sealing member; the third sealing member is an L-shaped sealing member. The selection and matching of the three sealing structures show a significant synergistic effect in terms of technical effects. First of all, as the last seal, the floating seal uses the pressure difference to achieve effective sealing, and can flexibly cope with the change of working conditions to ensure the stability of the sealing performance. Secondly, as the second barrier, the lip-shaped seal focuses on intercepting the fine sediment that has passed over the third seal assembly. Its unique design can effectively block the intrusion of tiny particles and protect the bearing and the transmission shaft from wear. Finally, the L-shaped seal plays a primary sealing and intercepting role, and its structural characteristics can prevent large impurities from entering the inside of the seal assembly, providing reliable protection for the subsequent seal structure. The reasonable selection and matching of the three seal structures jointly ensure the high sealing performance and long-term stable operation of the transmission system.

[0029] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A spiral reamer assembly applicable to the dredging of shallow bottom sediment in rivers, lakes and reservoirs. The spiral reamer assembly is installed on a spiral reamer frame through an active support sleeve and a driven support sleeve, and includes a spiral reamer. The spiral reamer includes a hollow transmission shaft, and a left-handed spiral blade and a right-handed spiral blade are welded on the transmission shaft. It is characterized in that: Both ends of the transmission shaft are respectively provided with a driving flange and a driven flange; a transverse reinforcing plate is obliquely installed between the adjacent left-handed spiral blade and right-handed spiral blade.

2. The spiral reamer assembly applicable to the shallow sediment dredging of rivers, lakes and reservoirs according to claim 1, wherein: The included angle between the soil-facing surface of the transverse reinforcing plate and the tangent line at the end of the cutting edge is 36°-52°.

3. The spiral reamer assembly applicable to the dredging of shallow bottom mud in rivers, lakes and reservoirs according to claim 2, characterized in that: The thickness of the transverse reinforcing plate is 15-25 mm.

4. The spiral reamer assembly applicable to the dredging of shallow bottom sediment in rivers, lakes and reservoirs according to claim 1, characterized in that: A cutting edge is provided at the front end of the transverse reinforcing plate.

5. The spiral reamer assembly applicable to shallow bottom sediment dredging of rivers, lakes and reservoirs according to claim 4, characterized in that: The included angle between the soil-facing surface and the soil-backing surface of the cutting edge is 15-20 degrees.

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