A device for dredging a port channel to prevent siltation

Abstract

The application belongs to the technical field of anti-siltation dredging and discloses a device for anti-siltation dredging of a port channel, which comprises a positioning assembly fixed on a riverbed and a power assembly installed in the positioning assembly. The device is characterized in that the cooperation of the power assembly and a dredging assembly is achieved, the power assembly drives the rotation of a spiral conveying shaft, the downward sliding tendency of stones is weakened when the stones fall on the spiral blades of the spiral conveying shaft, the stones are guided to rise by the spiral conveying shaft, the silt driven to rise by the spiral conveying shaft falls downward through the grid-shaped spiral blades, the stones are stuck in the grid, the top of the spiral blades in the spiral conveying shaft is not flush with the top of the cylindrical storage, the stones are finally accumulated on the top of the spiral conveying shaft, the cost of separating sand and silt is reduced, and the time, labor and economic cost of determining the specific silt accumulation position are reduced, so that the dredging work is more simple and convenient.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of anti-silt dredging, and specifically relates to an anti-silt dredging device for a port channel. BACKGROUND

[0002] The port channel is a waterway specially designed for ship navigation, and the core function is to ensure the safety and efficient entry and exit of ships in the port, which is also a key infrastructure for sea logistics. In the process of frequent ship travel, the flow rate and impact force of the water flow increase, which causes the silt and sludge on the riverbed to accumulate at the river mouth intersection, which indirectly affects the navigation of large ships. When the ship travels to the silt area, the navigation capacity decreases, and the insufficient water depth can cause the ship to run aground or need to be unloaded. In order to avoid siltation, the port manager will regularly organize a construction team to carry out dredging work by using a dredging ship, a dredging ship or a ship equipped with a sand pump.

[0003] However, this will remove the silt and larger stones on the riverbed together, and the purposes of silt and stones are completely different. In the subsequent processing work, additional time and economic cost may be required to separate the stones from the silt, and the regular cleaning solution will require time to develop a plan each time, which will consume a large amount of manpower, material resources and financial resources during the period, and the project is very complicated. SUMMARY

[0004] To solve the problems raised in the background art, the application provides an anti-silt dredging device for a port channel, which solves the problem that the prior art cannot better separate silt and stones, and requires to prepare a plan every time, which requires a lot of cost.

[0005] To achieve the above purpose, the application provides the following technical scheme: an anti-silt dredging device for a port channel, comprising:

[0006] A positioning assembly fixed on the riverbed and a power assembly installed inside the positioning assembly;

[0007] A dredging assembly provided on the top of the positioning assembly;

[0008] A flow guide assembly installed on the positioning assembly;

[0009] The dredging assembly comprises a cylindrical storage fixed on the top of the positioning assembly, and a screw conveying shaft is drivingly connected to the power assembly;

[0010] The screw conveying shaft is located inside the cylindrical storage, and the upper half of the screw blade on the screw conveying shaft is designed as a grid, and the lower half is provided with equidistant grooves;

[0011] The lower end of the cylindrical storage is communicated with a group of shunt pipes in a ring array, the top of the shunt pipes is communicated with a transfer box, and an independent pipeline for discharging sludge outward is arranged on the transfer box;

[0012] A group of notches are arranged around the outer periphery of the lower end of the cylindrical storage, a group of flow guide cylinders are drivingly connected to the power assembly, the inside of the flow guide cylinder is provided with a storage ring, the power assembly drives the flow guide assembly to extract water and inject it into the storage ring, and a group of inclined notches are arranged around the side surface of the storage ring, and the end of the notch is directed to the central axis of the storage ring.

[0013] Preferably, the positioning assembly comprises two protective boxes and a bearing disc, the two protective boxes and the bearing disc are connected through a group of positioning cylinders arranged at equal angles in a ring, the top of the positioning cylinder is designed as an opening, a steel pipe can penetrate through the positioning cylinder and be driven into the riverbed, and the cylindrical storage is fixed to the top of the bearing disc.

[0014] Preferably, the power assembly comprises a motor fixed to the inside of the protective box, a support is drivingly connected to the output shaft of the motor, the top of the support is fixedly connected to the flow guide cylinder through a guide plate, and the output shaft of the motor is drivingly connected to the spiral conveying shaft.

[0015] Preferably, the protective box comprises a waterproof box.

[0016] The motor is fixed to the inside of the waterproof box, the waterproof box is movably clamped with the bearing disc one through a limiting ring one, and the support penetrates through the limiting ring one.

[0017] Preferably, the positioning assembly further comprises a support device connected between the waterproof box and the bearing disc one.

[0018] The support device comprises a support barrel fixed to the waterproof box and a receiving ring fixed to the bottom of the bearing disc one, the support barrel and the receiving ring are movably clamped through a limiting ring two, and the support penetrates through the limiting ring two.

[0019] Preferably, the power assembly further comprises a sun gear drivingly connected to the output shaft of the motor, a group of planetary gears are arranged around the bearing disc one, and the planetary gears are meshed with the sun gear.

[0020] The flow guide assembly comprises a flow guide pipe fixed to the bearing disc two and corresponding to the planetary gears, and a turbine located in the inside of the flow guide pipe is drivingly connected to the top of the planetary gears.

[0021] Preferably, the flow guide assembly further comprises an energy storage box, the energy storage box is movably clamped between the bearing disc two and the bearing disc one, a sealing plate is movably clamped to the inner wall of the energy storage box, and each flow guide pipe is communicated between the sealing plate and the energy storage box through a guide pipe.

[0022] The guide plate is internally provided with a hole diameter in communication with the inside of the energy storage box, and the other end of the hole diameter is in communication with the inside of the storage ring.

[0023] Preferably, the top of the flow guide pipe is provided with a metal filter screen, and the top of the flow guide pipe is higher than the end of the flow guide cylinder.

[0024] Preferably, the bearing disc two comprises a bearing one and a bearing two, the flow guide pipe is fixed on the bearing two, the bearing one is connected with the flow guide pipe through a positioning plate, and the guide plate is located between the bearing one and the bearing two.

[0025] Preferably, the cylindrical storage is fixed on the bearing two, and the output shaft of the motor is movably penetrated on the bearing two.

[0026] Compared with the prior art, the beneficial effects of the present application are as follows:

[0027] The present application cooperates the structures of the power assembly and the dredging assembly, the power assembly drives the spiral conveying shaft to rotate, the groove of the spiral blade on the spiral conveying shaft can weaken the downward sliding trend of the stone when the stone falls on the blade, the stone rises through the guidance of the spiral conveying shaft, and the silt driven to rise by the spiral conveying shaft falls downward through the grid-shaped design of the spiral blade, that is, the silt is always below the inside of the cylindrical storage, the stone is stuck in the grid, and the silt and the stone are separated, and it should be noted that the top of the spiral blade in the spiral conveying shaft is not flush with the top of the cylindrical storage, the stone is finally accumulated on the top of the spiral conveying shaft, the cost of subsequent separation of sand and silt is reduced, and the time, labor and economic cost of determining the specific silt accumulation position are also reduced, so that the dredging work is more simple and convenient.

[0028] The present application cooperates the structures of the power assembly and the dredging assembly, the power assembly drives the spiral conveying shaft to rotate, the groove of the spiral blade on the spiral conveying shaft can weaken the downward sliding trend of the stone when the stone falls on the blade, the stone rises through the guidance of the spiral conveying shaft, and the silt driven to rise by the spiral conveying shaft falls downward through the grid-shaped design of the spiral blade, that is, the silt is always below the inside of the cylindrical storage, the stone is stuck in the grid, and the silt and the stone are separated, and it should be noted that the top of the spiral blade in the spiral conveying shaft is not flush with the top of the cylindrical storage, the stone is finally accumulated on the top of the spiral conveying shaft, the cost of subsequent separation of sand and silt is reduced, and the time, labor and economic cost of determining the specific silt accumulation position are also reduced, so that the dredging work is more simple and convenient. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is an appearance structure schematic view of the present application;

[0030] Figure 2 It is an inside structure schematic view of the cylindrical storage of the present application;

[0031] Figure 3 It is an inside structure schematic view of the cylindrical storage of the present application; Figure 2 It is an enlarged schematic view of A in the present application;

[0032] Figure 4 The partial structure section view of the positioning assembly of the present application;

[0033] Figure 5 The internal structure section view of the positioning assembly of the present application;

[0034] Figure 6 The internal structure section view of the positioning assembly of the present application;

[0035] Figure 7 The structure split view of the positioning assembly of the present application;

[0036] Figure 8 The structure split view of the positioning assembly of the present application;

[0037] In the figure: 1, positioning assembly; 11, protection box; 111, waterproof box; 112, limiting ring one; 113, bearing disc one; 12, support device; 121, support barrel; 122, limiting ring two; 123, bearing ring; 14, bearing disc two; 141, bearing one; 142, bearing two; 15, positioning plate; 16, positioning cylinder; 2, power assembly; 21, motor; 22, sun gear; 23, support; 24, guide plate; 25, planetary gear; 3, dredging assembly; 31, cylindrical storage; 32, spiral conveying shaft; 33, shunt pipe; 34, transfer box; 36, flow guide cylinder; 37, storage ring; 4, flow guide assembly; 41, flow guide pipe; 411, turbine; 42, guide pipe; 43, sealing plate; 44, energy storage box. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work are within the protection scope of the present application.

[0039] As shown in Figures 1 to 8 The present application provides a port channel anti-silt dredging device, which comprises:

[0040] A positioning assembly 1 fixed on a riverbed and a power assembly 2 installed inside the positioning assembly 1;

[0041] A dredging assembly 3 arranged on the top of the positioning assembly 1;

[0042] A flow guide assembly 4 installed on the positioning assembly 1;

[0043] The dredging assembly 3 comprises a cylindrical storage 31 fixed on the top of the positioning assembly 1, and a spiral conveying shaft 32 is drivingly connected to the power assembly 2;

[0044] The spiral conveying shaft 32 is located in the interior of the cylindrical storage 31, the upper half of the thread blade on the spiral conveying shaft 32 is designed as a grid, and the lower half is provided with equidistant grooves;

[0045] The lower end of the exterior of the cylindrical storage 31 is communicated with a group of shunt pipes 33 in a ring array, the top of the shunt pipes 33 is jointly communicated with a transfer box 34, and the transfer box 34 is provided with independent pipelines for discharging sludge outward;

[0046] The outer periphery of the lower end of the cylindrical storage 31 is provided with a group of notches in a ring, a group of flow guide cylinders 36 are drivingly connected to the power assembly 2, the interior of the flow guide cylinders 36 is provided with a storage ring 37, the power assembly 2 drives the flow guide assembly 4 to extract water and inject it into the storage ring 37, and the side surface of the storage ring 37 is provided with a group of inclined notches in a ring, and the end of the notches is directed to the central axis of the storage ring 37.

[0047] By adopting the above scheme, the sludge and other sundries on the riverbed are preferentially cleaned, then the device is placed on the riverbed where the sludge is accumulated, and is fixed;

[0048] Then the power assembly 2 is started to drive the flow guide assembly 4 to extract water outside and inject it into the interior of the storage ring 37, finally the water is injected outward through the notches on the side surface of the storage ring 37, when the ship moves and guides the water flow to drive the sludge to the periphery of the device, the water flow injected through the notches on the storage ring 37 guides the sludge or the stones mixed therein to move outwardly behind the cylindrical storage 31, finally the sludge and the stones can enter the interior of the cylindrical storage 31 through the notches on the outer periphery of the lower end of the cylindrical storage 31, and during the period, the sludge and the stones do not appear excessive accumulation;

[0049] And the power assembly 2 also drives the flow guide cylinder 36 to rotate, so that the water flow injected by the storage ring 37 is not limited to a certain axis, but rotates around the cylindrical storage 31, which greatly reduces the range of sludge accumulation.

[0050] The power assembly 2 also drives the spiral conveying shaft 32 to rotate. When the silt and stones in the cylindrical storage 31 are too much, the recesses of the spiral blades on the spiral conveying shaft 32 can weaken the downward sliding tendency of the stones on the blades, but the silt is always below the cylindrical storage 31. When the spiral conveying shaft 32 rotates, the stones can rise, and the silt that can be driven upward by the spiral conveying shaft 32 falls downward through the grid-shaped spiral blades, that is, the silt is always below the cylindrical storage 31, and the stones are stuck in the grid, and the two are separated. It should be noted that the top of the spiral blade in the spiral conveying shaft 32 is not flush with the top of the cylindrical storage 31, so the stones will eventually accumulate on the top of the spiral conveying shaft 32.

[0051] When the silt and stones in the cylindrical storage 31 need to be cleaned, the input pipe of the sand pump is connected to the independent pipe at the top of the transfer box 34, and at this time the silt in the cylindrical storage 31 can be cleaned by the sand pump through the shunt pipe 33 and the transfer box 34.

[0052] The stones on the top of the spiral conveying shaft 32 can be cleaned by the excavator, which greatly reduces the cost of subsequent separation of sand and silt, and also reduces the time, labor and economic cost of determining the specific silt accumulation position, making the dredging work more simple and convenient.

[0053] But the cleaning cycle needs to be determined according to the actual situation, and the interval of each cleaning is not limited.

[0054] As shown in Figures 1-4 and Figure 8 The positioning assembly 1 includes a protective box 11 and a bearing disc two 14, and the protective box 11 and the bearing disc two 14 are connected through a group of positioning cylinders 16 arranged at equal angles in a ring, the top of the positioning cylinder 16 is designed as an opening, the steel pipe can penetrate the positioning cylinder 16 and be driven into the riverbed, and the cylindrical storage 31 is fixed on the top of the bearing disc two 14.

[0055] The above scheme is adopted: the device is placed on the riverbed first, the steel pipe is penetrated through the positioning cylinder 16 and driven into the riverbed after the position is determined, and the device is fixed on the riverbed at this time to prevent the device from floating with the water flow;

[0056] But it should be noted that the above-mentioned fixing device scheme is not unique, and in actual working conditions, it can be replaced with a more practical fixing scheme that fits the actual situation.

[0057] The power assembly 2 includes a motor 21 fixed in the protective box 11, a support 23 is drivingly connected to the output shaft of the motor 21, the top of the support 23 is fixedly connected with the flow guide cylinder 36 through a guide plate 24, and the output shaft of the motor 21 is drivingly connected with the spiral conveying shaft 32.

[0058] With the above scheme: the output shaft of the motor 21 drives the spiral conveying shaft 32 into working state, at the same time, the output shaft of the motor 21 also drives the guide plate 24 and the guide cylinder 36 on it to rotate through the support 23, the storage ring 37 guides the sludge into the cylindrical storage 31 through the jet flow, and at the same time, the range of sludge accumulation is reduced.

[0059] As shown in Figures 1-8 , the protective box 11 comprises a waterproof box 111;

[0060] The motor 21 is fixed in the waterproof box 111, the waterproof box 111 is movably clamped with the bearing disc I 113 through the limiting ring I 112, and the support 23 penetrates through the limiting ring I 112.

[0061] With the above scheme: when the support 23 is driven to rotate by the motor 21, the limiting ring I 112 is also rotated, but the external silt cannot enter the inside of the waterproof box 111 and contact the motor 21, thereby reducing the influence of external factors on the work of the motor 21, and prolonging the service life of the motor 21.

[0062] As shown in Figures 1-8 , the positioning assembly 1 further comprises a support 12 connected between the waterproof box 111 and the bearing disc I 113;

[0063] The support 12 comprises a support barrel 121 fixed on the waterproof box 111 and a receiving ring 123 fixed on the bottom of the bearing disc I 113, the support barrel 121 and the receiving ring 123 are movably clamped through the limiting ring II 122, and the support 23 penetrates through the limiting ring II 122.

[0064] With the above scheme: when the support 23 rotates, the limiting ring II 122 is also driven to rotate, but it is worth noting that this does not affect the support of the support 12 to the bearing disc I 113 as a whole, which can better guarantee that the weight of the sludge and stones in the guide assembly 4 and the cylindrical storage 31 presses the bearing disc I 113 to bend under long-term work, and further prolongs the service life of the device.

[0065] As shown in Figures 1-8 , the power assembly 2 further comprises a sun gear 22 drivingly connected to the output shaft of the motor 21, and a group of planetary gears 25 are arranged in a ring shape on the bearing disc I 113, and the planetary gears 25 are meshed with the sun gear 22;

[0066] The guide assembly 4 comprises a guide pipe 41 fixed on the bearing disc II 14 and corresponding to the planetary gear 25, and a turbine 411 located in the guide pipe 41 is drivingly connected to the top of the planetary gear 25.

[0067] The flow guide assembly 4 further comprises an energy storage box 44 movably connected between the second bearing disc 14 and the first bearing disc 113, and the inner wall of the energy storage box 44 movably connects a sealing plate 43, and each flow guide pipe 41 is connected between the sealing plate 43 and the energy storage box 44 through a guide pipe 42.

[0068] The guide plate 24 is internally provided with a hole diameter in communication with the inside of the energy storage box 44, and the other end of the hole diameter is in communication with the inside of the storage ring 37.

[0069] With the above scheme: the output shaft of the motor 21 drives the planetary gear 25 to rotate through the sun gear 22, and since the number of teeth of the sun gear 22 is greater than that of the planetary gear 25, the rotation speed of the planetary gear 25 is greater than that of the sun gear 22, thereby increasing the water pressure generated by the rotation of the turbine 411, and the water enters the inside of the storage ring 37 through the guide pipe 42, the energy storage box 44 and the hole diameter on the guide plate 24, so that the water is sprayed out from the end of the storage ring 37, and the impact force of the water flow can guide the surrounding sludge into the inside of the cylindrical storage 31, and reduce the problem of sludge accumulation.

[0070] When the guide plate 24 is driven to rotate, the energy storage box 44 also rotates, but since the guide pipe 42 is connected to the energy storage box 44 through the sealing plate 43, the water can also flow smoothly, and during the rotation of the flow guide cylinder 36, the flow guide pipe 41 will not always be located in the spraying stroke of the storage ring 37, thereby not causing excessive impact.

[0071] As shown in Figures 5-7 , the top of the flow guide pipe 41 is provided with a metal filter screen, and the top of the flow guide pipe 41 is higher than the end of the flow guide cylinder 36.

[0072] With the above scheme: when the turbine 411 extracts water above the flow guide pipe 41, the metal filter screen on the flow guide pipe 41 can effectively reduce the impurities entering the inside of the flow guide pipe 41, thereby interfering with the rotation of the turbine 411 and causing unnecessary wear, and when the top of the flow guide pipe 41 is higher than the end of the flow guide cylinder 36, the water sprayed by the storage ring 37 will greatly reduce the probability of sludge drifting to the top of the flow guide pipe 41 when guiding the sludge to move, further preventing the possibility of the metal filter screen being blocked.

[0073] As shown in Figures 1-8 , the second bearing disc 14 comprises a bearing part 141 and a bearing part 142, the flow guide pipe 41 is fixed to the bearing part 142, the bearing part 141 is connected to the flow guide pipe 41 through the positioning plate 15, and the guide plate 24 is located between the bearing part 141 and the bearing part 142.

[0074] The cylindrical storage 31 is fixed to the bearing part 142, and the output shaft of the motor 21 movably penetrates the bearing part 142.

[0075] Adopt the above scheme: since the bearing piece one 141 and the waterproof box 111 are connected through the positioning cylinder 16, and in the state, the steel pipe penetrates the positioning cylinder 16 and is driven into the riverbed, the bearing piece one 141 is in a fixed state, and the bearing piece one 141 is also connected to the flow guide pipe 41 through the positioning plate 15, and the flow guide pipe 41 is fixed to the bearing piece two 142, so that the bearing piece two 142 and the structure thereon are also in a fixed state, and only when the cylindrical storage 31 is fixed, the rotation of the spiral conveying shaft 32 can convey the sand and stones in the cylindrical storage 31 to the top of the cylindrical storage 31, thereby ensuring the smoothness of the device work.

[0076] The working principle and use process of the present application are as follows:

[0077] The silt and other sundries on the riverbed are preferentially cleaned, and then the device is placed on the riverbed where the silt is accumulated, the steel pipe penetrates the positioning cylinder 16 and is driven into the riverbed, at this time the device is fixed on the riverbed;

[0078] The output shaft of the motor 21 drives the planetary gear 25 to rotate through the sun gear 22, the water pressure generated by the rotation of the turbine 411 is increased, the water enters the inside of the storage ring 37 through the guide pipe 42, the energy storage box 44 and the aperture on the guide plate 24, so that the water is sprayed out from the end of the storage ring 37, and the impact force of the water flow can guide the surrounding silt into the inside of the cylindrical storage 31;

[0079] The motor 21 drives the guide plate 24 and the flow guide cylinder 36 thereon to rotate through the support 23, and the storage ring 37 guides the silt into the inside of the cylindrical storage 31 through the sprayed water flow;

[0080] The motor 21 drives the spiral conveying shaft 32 to rotate, when the silt and stones in the cylindrical storage 31 are retained too much, the recesses of the spiral blades on the spiral conveying shaft 32 can make the stones fall on the blades, and the downward sliding trend of the sand and stones is weakened, when the spiral conveying shaft 32 rotates, the stones can rise, and the silt that may be driven to rise by the spiral conveying shaft 32 falls downward through the grid-shaped design of the spiral blades, the silt is always below the inside of the cylindrical storage 31, the stones are stuck in the grid, and the two are separated, and it should be noted that the top of the spiral blades in the spiral conveying shaft 32 is not flush with the top of the cylindrical storage 31, so the stones will finally be accumulated on the top of the spiral conveying shaft 32;

[0081] When the silt and stones in the cylindrical storage 31 need to be cleaned, the input pipe of the sand pump is connected to the independent pipe on the top of the transfer box 34, at this time the silt in the cylindrical storage 31 can be cleaned by the sand pump through the shunt pipe 33 and the transfer box 34, and the stones on the top of the spiral conveying shaft 32 can be cleaned by the excavator.

[0082] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and implementations, it is to be understood that the terminology used is for the purpose of descriptive clarity and that it should be taken in its broadest possible sense. For example, the terms "a", "an", and "the" include both singular and plural referents unless the context clearly dictates otherwise. The terms "comprises", "comprising", "includes", "including" and the like can be used in conjunction with the term "consisting of to include the elements or steps listed after such conjunctive language, but not to the exclusion of other elements or steps. The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

[0083] While the embodiments of the application have been shown and described herein, it is to be understood that the application is not limited to these embodiments. Rather, many modifications, changes and substitutions are intended to fall within the scope of the present application, which is limited only by the scope of the claims hereinafter appended.

Claims

1. A device for anti-silting dredging of a port waterway, characterized in that, The utility model relates to a riverbed dredging device which comprises a positioning assembly (1) fixed on the riverbed and a power assembly (2) installed in the positioning assembly (1); a dredging assembly (3) arranged on the top of the positioning assembly (1); a flow guide assembly (4) installed on the positioning assembly (1); the dredging assembly (3) comprises a cylindrical storage (31) fixed on the top of the positioning assembly (1), and a spiral conveying shaft (32) is drivingly connected to the power assembly (2); the spiral conveying shaft (32) is located in the cylindrical storage (31), the upper half of the threaded blade of the spiral conveying shaft (32) is designed as a grid, and the lower half is provided with equidistant grooves; the lower end of the cylindrical storage (31) is communicated with a group of shunt pipes (33) arranged in a ring array, the top of the shunt pipes (33) is jointly communicated with a transfer box (34), and the transfer box (34) is provided with independent pipelines for discharging sludge outward; a group of notches are arranged in a ring around the outer periphery of the lower end of the cylindrical storage (31), a group of flow guide cylinders (36) are drivingly connected to the power assembly (2), the flow guide cylinders (36) are provided with storage rings (37) inside, the power assembly (2) drives the flow guide assembly (4) to extract water and inject the water into the storage rings (37), and a group of inclined notches are arranged in a ring around the side surface of the storage rings (37), and the end of each notch faces the central axis of the storage rings (37). The positioning assembly (1) comprises a protection box (11) and a bearing disc two (14), the protection box (11) and the bearing disc two (14) are connected through a group of positioning cylinders (16) arranged in a ring array at equal angles, the top of the positioning cylinder (16) is designed as an opening, a steel pipe can penetrate through the positioning cylinder (16) and be driven into the riverbed, and the cylindrical storage (31) is fixed on the top of the bearing disc two (14). The power assembly (2) comprises a motor (21) fixed in the protection box (11), a support (23) is drivingly connected to the output shaft of the motor (21), the top of the support (23) is fixedly connected with the flow guide cylinder (36) through a guide plate (24), and the output shaft of the motor (21) is drivingly connected with the spiral conveying shaft (32). The protection box (11) comprises a waterproof box (111). The motor (21) is fixed in the waterproof box (111), the waterproof box (111) is movably clamped with the bearing disc one (113) through a limiting ring one (112), and the support (23) penetrates through the limiting ring one (112). The positioning assembly (1) further comprises a support device (12) connected between the waterproof box (111) and the bearing disc one (113). The support device (12) comprises a support barrel (121) fixed on the waterproof box (111) and a receiving ring (123) fixed on the bottom of the bearing disc one (113), the support barrel (121) and the receiving ring (123) are movably clamped through a limiting ring two (122), and the support (23) penetrates through the limiting ring two (122). ​ 2. Harbour channel anti-silting dredging device according to claim 1, characterized in that: ​ 3. Harbour channel anti-silting dredging device according to claim 2, characterized in that: ​ 4. A device for the dredging of ports and waterways, according to claim 3, characterized in that: ​ ​ 5. A device for the dredging of ports and waterways, according to claim 4, characterized in that: ​ ​ 6. A device for dredging a port channel to prevent silting according to claim 4, characterized in that: The power assembly (2) further comprises a sun gear (22) which is in transmission connection with the output shaft of the motor (21), a set of planetary gears (25) are arranged in a ring shape on the first bearing disc (113), and the planetary gears (25) are in meshing connection with the sun gear (22); The flow guide assembly (4) comprises flow guide pipes (41) which are fixed on the second bearing disc (14) and correspond to the planetary gears (25), and the top of the planetary gears (25) is in transmission connection with turbines (411) which are located inside the flow guide pipes (41).

7. Harbour channel anti- accretion dredging device according to claim 6, characterized in that: The flow guide assembly (4) further comprises energy storage boxes (44) which are movably clamped between the second bearing disc (14) and the first bearing disc (113), the inner wall of the energy storage boxes (44) is movably clamped with sealing plates (43), and each flow guide pipe (41) is communicated between the sealing plate (43) and the energy storage box (44) through a guide pipe (42); The inner part of the guide plate (24) is provided with a hole diameter which is communicated with the inside of the energy storage box (44), and the other end of the hole diameter is communicated with the inside of the storage ring (37).

8. Harbour channel anti- accretion dredging device according to claim 7, characterized in that: The top of the flow guide pipe (41) is provided with a metal filter screen, and the top of the flow guide pipe (41) is higher than the end of the flow guide cylinder (36).

9. Harbour channel anti- accretion dredging device according to claim 7, characterized in that: The second bearing disc (14) comprises a bearing part one (141) and a bearing part two (142), the flow guide pipe (41) is fixed on the bearing part two (142), the bearing part one (141) is connected with the flow guide pipe (41) through a positioning plate (15), and the guide plate (24) is located between the bearing part one (141) and the bearing part two (142).

10. A device for dredging a port channel according to claim 7, characterized in that: The cylindrical storage (31) is fixed on the bearing part two (142), and the output shaft of the motor (21) is movably penetrated on the bearing part two (142).

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