A streamlined bow thruster grid structure

Abstract

The present invention relates to the technical field of ship thruster devices, and specifically to a streamlined bow thruster grid structure, comprising a thruster cylinder, an end of the thruster cylinder being embedded with a streamlined thruster grid, an interior of the streamlined thruster grid being provided with a locking device, an outer surface of the locking device away from the center of the thruster cylinder penetrating the streamlined thruster grid and being clamped with an inner wall of the thruster cylinder, and an end of the streamlined thruster grid close to an outer port of the thruster cylinder being hinged with evenly distributed blocking devices; by arranging a locking mechanism, a staff member can drive all clamping strips to be clamped or separated with clamping grooves by rotating a ring, and the ring member can drive all clamping strips to be clamped or separated with clamping grooves through a first tooth groove and a driven gear, so that the staff member can easily load and unload the streamlined thruster grid, and the staff member can smoothly enter the interior of the thruster cylinder, so as to ensure that the staff member can normally inspect and maintain the bow thruster, making the staff member's work easier.

Description

Technical Field

[0001] The invention relates to the technical field of ship thrusters, and in particular to a streamlined bow thruster grid structure. Background Art

[0002] The streamlined bow thruster grid is a device used to isolate the bow thruster inside the thruster cylinder to prevent the bow thruster from being entangled by foreign objects such as water plants and garbage. To save money, thruster grids must be installed on both sides of the thruster cylinder. In recent years, in order to save the cost and time of ship docking and maintenance, many engineering ships need to obtain UWILD (Underwater Inspection Mark) classification symbols. The so-called underwater inspection means that the ship does not need to enter the dock, and can be directly inspected by professional divers. In order to facilitate divers to enter the thruster cylinder to inspect the thruster. Since the existing thruster grids are all set as an integrated structure, it is difficult for maintenance personnel to open the thruster grid alone underwater, which increases the difficulty for staff to inspect the bow thruster. Summary of the invention

[0003] The purpose of the present invention is to provide a streamlined bow thruster grid structure in order to solve the above problems, thereby improving the problem that the streamlined bow thruster grid is difficult to load and unload, and it is difficult for staff to inspect the bow thruster inside the thruster cylinder.

[0004] The present invention achieves the above-mentioned purpose through the following technical solutions: a streamlined bow thrust grid structure, comprising a thrust cylinder, an end of which is embedded with a streamlined thrust grid, a locking device is installed inside the streamlined thrust grid, an outer surface of the locking device away from the center of the thrust cylinder penetrates the streamlined thrust grid and is clamped with the inner wall of the thrust cylinder, and an end of the streamlined thrust grid close to the outer port of the thrust cylinder is hinged with evenly distributed blocking devices; wherein, the locking device comprises a locking mechanism installed inside the streamlined thrust grid, an outer surface of the locking mechanism away from the center of the thrust cylinder penetrates the streamlined thrust grid and is clamped with the inner wall of the thrust cylinder, an adjusting mechanism is installed on the inner side of the locking mechanism, and an end of the adjusting mechanism close to the outer port of the thrust cylinder penetrates into the interior of the streamlined thrust grid.

[0005] Preferably, the inner wall of the side-thrust cylinder is provided with a clamping groove annularly distributed around the center line of the side-thrust cylinder, the outer surface of the streamlined side-thrust grille is provided with a guide opening annularly distributed around the center line of the side-thrust cylinder, the interior of the streamlined side-thrust grille is provided with an annular installation groove connected to the guide opening, the locking mechanism includes a ring and a driven gear annularly distributed around the center line of the side-thrust cylinder, the ring and the driven gear are both rotatably connected to the inner wall of the annular installation groove, the driven gear is arranged between the ring and the guide opening, the outer surface of the ring is provided with a first tooth groove annularly distributed around the center line of the side-thrust cylinder, the driven gear is close to The outer surface of the center line of the side thrust cylinder is meshed with the adjacent first tooth groove, and the outer surface of the driven gear away from the center line of the side thrust cylinder is fixedly connected with a clamping strip, and the end of the clamping strip away from the driven gear passes through the guide port and is plugged into the clamping groove {by setting a locking mechanism, the staff can rotate the ring, and the ring drives all the clamping strips to engage or separate with the clamping grooves through the first tooth groove and the driven gear, so that the staff can easily load and unload the streamlined side thrust grid, and the staff can smoothly enter the interior of the side thrust cylinder to ensure that the staff can normally inspect and maintain the bow thruster, making the staff's work easier}.

[0006] Preferably, the snap-in groove is aligned with the adjacent guide opening, and the vertical cross-section formed by the guide opening and the adjacent snap-in groove is fan-shaped {this can ensure that the snap-in strip can rotate normally to reduce the probability of the snap-in strip being obstructed}.

[0007] Preferably, the inner surface of the ring is provided with evenly distributed second tooth grooves, and the adjusting mechanism includes a mounting box fixedly connected to the inner surface of the streamlined side-push grille, the inner wall of the mounting box is rotatably connected to a driving gear, the outer surface of the driving gear close to the ring sequentially penetrates the mounting box, the streamlined side-push grille and the annular mounting groove and is meshed with the second tooth groove, and the end of the driving gear close to the outer port of the side-push cylinder is slidably connected to a hexagonal adjusting rod, and the end of the hexagonal adjusting rod close to the outer port of the side-push cylinder penetrates to the outside of the mounting box {by setting the adjusting mechanism, the staff can easily rotate the ring through the hexagonal adjusting rod, which reduces the difficulty for the staff to lock or unlock the streamlined side-push grille, and when the hexagonal adjusting rod is not in use, the spring can push the positioning block into the positioning groove through the T-shaped connecting block to reduce the probability of the card strip loosening during use, so that the streamlined side-push grille runs more stably}.

[0008] Preferably, a positioning groove is provided on one side of the inner wall of the installation box near the outer port of the side push cylinder, and one end of the hexagonal adjusting rod near the outer port of the side push cylinder extends to the outside of the positioning groove, and the outer surface of the hexagonal adjusting rod is fixedly connected with a positioning block engaged with the positioning groove, and the vertical cross-sectional shapes of the positioning groove and the positioning block are both matching regular octagons {when the positioning groove and the positioning block are engaged together, the positioning groove prevents the hexagonal adjusting rod from rotating through the positioning block to ensure that the engaging strip can be tightly engaged with the engaging groove}.

[0009] Preferably, the effective rotation range of the driving gear is the same as the maximum rotation range of the card strip, and the positioning block and the positioning groove just coincide with each other when the driving gear is at the initial and extreme rotation angles {this not only reduces the difficulty of connecting the positioning block and the positioning groove together, but also reduces the interference with the normal adjustment of the card strip, so as to ensure that the card strip can be adjusted into place normally}.

[0010] Preferably, a T-shaped mounting groove is formed at one end of the driving gear close to the outer port of the side thrust cylinder, and the inner wall of the T-shaped mounting groove is slidably connected to a T-shaped connecting block fixedly connected to the inner hexagonal adjusting rod, and the end of the T-shaped connecting block away from the outer port of the side thrust cylinder is fixedly connected to a spring in contact with the T-shaped mounting groove, and the spring is always in a compressed state {when the inner hexagonal adjusting rod loses resistance, the spring can push the positioning block into the positioning groove through the T-shaped connecting block, without the need for manual adjustment by the staff, further reducing the difficulty of use for the staff}.

[0011] Preferably, a sealing sleeve is fixedly connected to the outer surface of the hexagonal adjustment rod, and the end of the sealing sleeve away from the outer port of the side push cylinder is fixedly connected to the installation box, and the sealing sleeve is a nitrile rubber material component {the sealing sleeve can seal the gap between the hexagonal adjustment rod and the installation box to reduce the probability of the hexagonal adjustment rod being stuck}.

[0012] Preferably, the blocking device comprises barrier mesh plates evenly distributed and hinged to one end of the streamlined side thrust grid near the outer port of the side thrust cylinder, the hinged part of the barrier mesh plate and the streamlined side thrust grid is arranged above the installation box, and the inner surface of the barrier mesh plate is embedded with a barrier filter screen {by setting the blocking device, in the process of the bow thruster discharging water in a certain direction of the side thrust cylinder, the water flow from the inside of the side thrust cylinder to the outside of the side thrust cylinder can easily push the barrier mesh plate out of the inside of the side thrust cylinder The water flow from the outside of the side thrust cylinder to the inside of the side thrust cylinder is prevented by the streamlined side thrust grid from preventing the blocking mesh plate from rotating toward the inside of the side thrust cylinder. At this time, the blocking mesh plate can block the garbage, water plants and other foreign objects mixed in the water flow, which makes it difficult for the garbage, water plants and other foreign objects inside the side thrust cylinder to enter but easy to exit. This reduces the probability of garbage, water plants and other foreign objects being retained inside the side thrust cylinder, thereby reducing the probability of the bow thruster being stuck by garbage, water plants and other foreign objects.

[0013] Preferably, the barrier mesh plate and the barrier filter are of an integrally formed design, and the vertical cross-section formed by the barrier mesh plate and the barrier filter is in a one-way serrated shape, with the tip of the serration facing downward, and the tip of the serration is arranged at one end close to the outer port of the side thrust cylinder, which can improve the overall impact resistance of the blocking device to reduce the situation where the barrier filter is damaged due to frequent impact of water flow at a certain point.

[0014] The beneficial effects of the present invention are:

[0015] 1. By setting a locking mechanism, the staff can rotate the ring, and the ring drives all the clamping strips to engage or separate with the clamping grooves through the first tooth groove and the driven gear, so that the staff can easily load and unload the streamlined side thrust grid, and the staff can smoothly enter the inside of the side thrust cylinder to ensure that the staff can normally check and maintain the bow thruster, making the staff's work easier;

[0016] 2. By setting up the adjustment mechanism, the staff can easily rotate the ring through the hexagonal adjustment rod, which reduces the difficulty of the staff to lock or unlock the streamlined side push grille. When the hexagonal adjustment rod is not in use, the spring can push the positioning block into the positioning groove through the T-shaped connecting block to reduce the probability of the card strip loosening during use, making the streamlined side push grille run more stably;

[0017] 3. By setting a blocking device, in the process of the bow thruster discharging water in a certain direction toward the side thrust cylinder, the water flow from the inside of the side thrust cylinder to the outside of the side thrust cylinder can easily push open the barrier screen and bring out the garbage, aquatic plants and other foreign objects inside the side thrust cylinder, while the water flow from the outside of the side thrust cylinder to the inside of the side thrust cylinder prevents the barrier screen from rotating toward the inside of the side thrust cylinder through the streamlined side thrust grid. At this time, the barrier screen can block the garbage, aquatic plants and other foreign objects mixed in the water flow, which makes it difficult for the garbage, aquatic plants and other foreign objects inside the side thrust cylinder to enter but easy to exit, which reduces the probability of the garbage, aquatic plants and other foreign objects being retained inside the side thrust cylinder, so as to reduce the probability of the bow thruster being stuck by the garbage, aquatic plants and other foreign objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a closed schematic diagram of the blocking device in the present invention;

[0019] Figure 2 It is a schematic diagram of the expansion of the blocking device in the present invention;

[0020] Figure 3 It is a vertical cross-sectional schematic diagram of the present invention;

[0021] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0022] Figure 5 It is a schematic diagram of the connection between the locking mechanism and the adjusting mechanism of the present invention;

[0023] Figure 6 It is an exploded schematic diagram of the regulating mechanism in the present invention;

[0024] Figure 7 It is a vertical cross-sectional schematic diagram of the adjustment mechanism in the present invention;

[0025] Figure 8 It is a schematic diagram of the structure of the blocking device in the present invention.

[0026] In the figure: 1. side push cylinder; 11. snap-in groove; 2. streamlined side push grille; 21. guide port; 22. annular mounting groove; 3. locking device; 31. locking mechanism; 311. ring; 312. driven gear; 313. first tooth groove; 314. snap-in strip; 315. second tooth groove; 32. adjusting mechanism; 321. mounting box; 322. driving gear; 323. hexagonal adjusting rod; 324. positioning groove; 325. positioning block; 326. T-type mounting groove; 327. T-type connecting block; 328. spring; 329. sealing sleeve; 4. blocking device; 41. barrier screen; 42. barrier filter. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] When implementing: Figure 1-8As shown, a streamlined bow thrust grid structure comprises a thrust cylinder 1, a streamlined thrust grid 2 is embedded and installed at the end of the thrust cylinder 1, a locking device 3 is installed inside the streamlined thrust grid 2, the outer surface of the locking device 3 away from the center of the thrust cylinder 1 penetrates the streamlined thrust grid 2 and is clamped with the inner wall of the thrust cylinder 1, and the end of the streamlined thrust grid 2 close to the outer port of the thrust cylinder 1 is hinged with a uniformly distributed blocking device 4; wherein the locking device 3 comprises a locking mechanism 31 installed inside the streamlined thrust grid 2, and the locking mechanism The outer surface of the locking mechanism 31 away from the center line of the thrust cylinder 1 passes through the streamlined thrust grid 2 and is clamped with the inner wall of the thrust cylinder 1. An adjusting mechanism 32 is installed on the inner side of the locking mechanism 31. The end of the adjusting mechanism 32 close to the outer port of the thrust cylinder 1 passes through the interior of the streamlined thrust grid 2 {Under normal circumstances, bow thrust grids are all designed to be horizontal and vertical, and bow thrust manufacturers also recommend this design. This design only takes the use of the bow thruster into consideration, and does not optimize the hull line shape, let alone improve the overall performance. The design of the streamlined thrust grid 2 is now adopted. The grid is consistent with the line shape of the hull outer plate, and the direction of the grid plate is adjusted according to the shape of the streamline. The ship model test and the final sea trial have proved that this effectively reduces the resistance of the grid, ensuring that the rapidity level reaches the optimal level of similar ships, and its flexibility and applicability are wider}.

[0029] like Figure 3 , Figure 4 and Figure 5 As shown, the inner wall of the side-thrust cylinder 1 is provided with a clamping groove 11 which is distributed in an annular shape around the center line of the side-thrust cylinder 1, the outer surface of the streamlined side-thrust grid 2 is provided with a guide opening 21 which is distributed in an annular shape around the center line of the side-thrust cylinder 1, and the interior of the streamlined side-thrust grid 2 is provided with an annular installation groove 22 which is connected with the guide opening 21, and the locking mechanism 31 includes a ring 311 and a driven gear 312 which is distributed in an annular shape around the center line of the side-thrust cylinder 1, the ring 311 and the driven gear 312 are both rotatably connected to the inner wall of the annular installation groove 22, the driven gear 312 is arranged between the ring 311 and the guide opening 21, and the outer surface of the ring 311 is provided with a ring around the center line of the side-thrust cylinder 1. The first tooth groove 313 is distributed in a shape of a circle, and the outer surface of the driven gear 312 close to the center line of the side thrust cylinder 1 is meshed with the adjacent first tooth groove 313. The outer surface of the driven gear 312 away from the center line of the side thrust cylinder 1 is fixedly connected with a clamping strip 314. The end of the clamping strip 314 away from the driven gear 312 passes through the guide port 21 and is plugged into the clamping groove 11; the clamping groove 11 is aligned with the adjacent guide port 21, and the vertical cross-section formed by the guide port 21 and the adjacent clamping groove 11 is fan-shaped {when the staff embeds the streamlined side thrust grid 2 into the interior of the side thrust cylinder 1 and clamps it into place, the clamping groove 11 is just aligned with the adjacent guide port 21}.

[0030] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the inner surface of the ring 311 is provided with uniformly distributed second tooth grooves 315, the adjustment mechanism 32 includes a mounting box 321 fixedly connected to the inner surface of the streamlined side push grid 2, the inner wall of the mounting box 321 is rotatably connected to a driving gear 322, the outer surface of the driving gear 322 near the ring 311 sequentially penetrates the mounting box 321, the streamlined side push grid 2 and the annular mounting groove 22 and is meshed with the second tooth groove 315, and the end of the driving gear 322 near the outer port of the side push cylinder 1 is slidably connected to a hexagonal adjusting rod 323, one end of the hexagonal adjusting rod 323 close to the outer port of the side thrust cylinder 1 passes through the outside of the mounting box 321; a positioning groove 324 is provided on one side of the inner wall of the mounting box 321 close to the outer port of the side thrust cylinder 1, and one end of the hexagonal adjusting rod 323 close to the outer port of the side thrust cylinder 1 passes through the outside of the positioning groove 324, and a positioning block 325 that is engaged with the positioning groove 324 is fixedly connected to the outer surface of the hexagonal adjusting rod 323, and the vertical cross-sectional shapes of the positioning groove 324 and the positioning block 325 are both matching regular octagons {when When the positioning groove 324 and the positioning block 325 are engaged together, the positioning groove 324 prevents the hexagonal adjusting rod 323 from rotating through the positioning block 325 to ensure that the clamping strip 314 can be tightly engaged with the clamping groove 11. The effective rotation range of the driving gear 322 is the same as the maximum rotation range of the clamping strip 314. When the driving gear 322 is at the initial and extreme rotation angles, the positioning block 325 coincides with the positioning groove 324. The driving gear 322 is provided with a T-shaped mounting groove 326 at one end close to the outer port of the side thrust cylinder 1. The inner wall of the T-shaped mounting groove 326 is slidably connected with a T-shaped connecting block 327 fixedly connected to the inner hexagonal adjusting rod 323, and the end of the T-shaped connecting block 327 away from the outer port of the side thrust cylinder 1 is fixedly connected with a spring 328 in contact with the T-shaped mounting groove 326, and the spring 328 is always in a compressed state; the outer surface of the inner hexagonal adjusting rod 323 is fixedly connected with a sealing sleeve 329, and the end of the sealing sleeve 329 away from the outer port of the side thrust cylinder 1 is fixedly connected to the mounting box 321, and the sealing sleeve 329 is a component made of nitrile rubber material.

[0031] like Figure 8As shown, the blocking device 4 includes barrier mesh plates 41 that are evenly distributed and hinged to one end of the streamlined side thrust grid 2 close to the outer port of the side thrust cylinder 1. The hinge between the barrier mesh plate 41 and the streamlined side thrust grid 2 is arranged above the installation box 321. The inner surface of the barrier mesh plate 41 is embedded with a barrier filter screen 42. During the normal navigation of the ship, the barrier mesh plate 41 and the barrier filter screen 42 are tightly attached to the surface of the streamlined side thrust grid 2 under the influence of gravity and water flow pressure, which can further filter the water plants and garbage in the water. During the process of the bow thruster discharging water in a certain direction toward the side thrust cylinder 1, the water flow can easily push open the barrier mesh plate 41 during the flow from the inside of the side thrust cylinder 1 to the outside of the side thrust cylinder 1, so that the water flow can easily bring out the garbage inside the side thrust cylinder 1. , aquatic plants and other foreign objects, and in the process of water flowing from the outside of the side thrust cylinder 1 to the inside of the side thrust cylinder 1, the streamlined side thrust grid 2 prevents the blocking mesh plate 41 from rotating toward the inside of the side thrust cylinder 1. At this time, the blocking mesh plate 41 can block the garbage, aquatic plants and other foreign objects mixed in the water flow, which makes it difficult for the garbage, aquatic plants and other foreign objects inside the side thrust cylinder 1 to enter but easy to exit, thereby reducing the probability of garbage, aquatic plants and other foreign objects being retained inside the side thrust cylinder 1, so as to reduce the probability of the bow thruster being stuck by garbage, aquatic plants and other foreign objects}; the blocking mesh plate 41 and the blocking filter screen 42 are integrally formed, and the vertical cross-section formed by the blocking mesh plate 41 and the blocking filter screen 42 is a one-way serrated shape, with the tip of the sawtooth facing downward, and the tip of the sawtooth is arranged at one end close to the outer port of the side thrust cylinder 1.

[0032] When the present invention is in use, when the staff needs to check and maintain the bow thruster inside the thrust cylinder 1, the staff only needs to push away the corresponding blocking mesh plate 41 to expose the inner hexagonal adjustment rod 323 to the outside, and then the staff connects the inner hexagonal adjustment rod 323 with the inner hexagonal adjustment rod 323, and then presses the inner hexagonal adjustment rod 323 with the hexagonal adjustment rod 323, and the inner hexagonal adjustment rod 323 drives the positioning block 325 to separate from the positioning groove 324, and then the staff can rotate the hexagonal wrench in the corresponding direction, and the hexagonal wrench drives the T-shaped connecting block 327 to rotate, and the T-shaped connecting block 327 drives the driving gear 32 through the T-shaped mounting groove 326. 2 rotates, the driving gear 322 drives the ring 311 to rotate through the second tooth groove 315, and the ring 311 drives all the driven gears 312 to rotate through the first tooth groove 313 at the same time, and the driven gear 312 drives the clamping strip 314 to rotate from the clamping groove 11 to the inside of the annular installation groove 22. When the clamping strip 314 completely enters the annular installation groove 22, the streamlined side thrust grid 2 and the side thrust cylinder 1 lose resistance, and the staff can pull the streamlined side thrust grid 2 out of the inner wall of the side thrust cylinder 1, so that the staff can smoothly enter the inside of the side thrust cylinder 1, so as to ensure that the staff can normally check and maintain the bow thruster, making the staff work easier.

[0033] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A streamlined bow thruster grid structure, comprising a thruster cylinder (1), characterized in that: A streamlined side-thrust grille (2) is embedded and installed at the end of the side-thrust cylinder (1); a locking device (3) is installed inside the streamlined side-thrust grille (2); the outer surface of the locking device (3) away from the center of the side-thrust cylinder (1) penetrates the streamlined side-thrust grille (2) and is clamped with the inner wall of the side-thrust cylinder (1); and one end of the streamlined side-thrust grille (2) close to the outer port of the side-thrust cylinder (1) is hinged with evenly distributed blocking devices (4); The locking device (3) comprises a locking mechanism (31) installed inside the streamlined side-thrust grille (2); an outer surface of the locking mechanism (31) away from the center line of the side-thrust cylinder (1) penetrates the streamlined side-thrust grille (2) and is engaged with the inner wall of the side-thrust cylinder (1); an adjusting mechanism (32) is installed inside the locking mechanism (31); an end of the adjusting mechanism (32) close to the outer port of the side-thrust cylinder (1) penetrates into the interior of the streamlined side-thrust grille (2); The inner wall of the side thrust cylinder (1) is provided with a clamping groove (11) which is distributed in an annular shape around the center line of the side thrust cylinder (1); the outer surface of the streamlined side thrust grid (2) is provided with a guide opening (21) which is distributed in an annular shape around the center line of the side thrust cylinder (1); the interior of the streamlined side thrust grid (2) is provided with an annular installation groove (22) which is connected to the guide opening (21); the locking mechanism (31) comprises a ring (311) and a driven gear (312) which is distributed in an annular shape around the center line of the side thrust cylinder (1); the ring (311) and the driven gear (312) are both rotatably connected to the inner wall of the annular installation groove (22). The driven gear (312) is arranged between the ring (311) and the guide opening (21); the outer surface of the ring (311) is provided with first tooth grooves (313) distributed in an annular shape around the center line of the side thrust cylinder (1); the outer surface of the driven gear (312) close to the center line of the side thrust cylinder (1) is meshedly connected with the adjacent first tooth grooves (313); the outer surface of the driven gear (312) away from the center line of the side thrust cylinder (1) is fixedly connected with a clamping strip (314); the end of the clamping strip (314) away from the driven gear (312) passes through the guide opening (21) and is plugged into the clamping groove (11).

2. The streamlined bow thruster grid structure according to claim 1, characterized in that: The clamping groove (11) is aligned with the adjacent guide opening (21), and the vertical cross-section formed by the guide opening (21) and the adjacent clamping groove (11) is in the shape of a fan.

3. The streamlined bow thruster grid structure according to claim 1, characterized in that: The inner surface of the ring (311) is provided with uniformly distributed second tooth grooves (315). The adjustment mechanism (32) comprises a mounting box (321) fixedly connected to the inner surface of the streamlined side-thrust grille (2). The inner wall of the mounting box (321) is rotatably connected to a driving gear (322). The outer surface of the driving gear (322) near the ring (311) sequentially penetrates the mounting box (321), the streamlined side-thrust grille (2) and the annular mounting groove (22) and is meshedly connected to the second tooth groove (315). An end of the driving gear (322) near the outer port of the side-thrust cylinder (1) is slidably connected to an inner hexagonal adjusting rod (323). An end of the inner hexagonal adjusting rod (323) near the outer port of the side-thrust cylinder (1) penetrates to the outside of the mounting box (321).

4. The streamlined bow thruster grid structure according to claim 3, characterized in that: A positioning groove (324) is provided on one side of the inner wall of the installation box (321) close to the outer end of the side thrust cylinder (1); one end of the hexagonal adjustment rod (323) close to the outer end of the side thrust cylinder (1) passes through the outside of the positioning groove (324); a positioning block (325) that is engaged with the positioning groove (324) is fixedly connected to the outer surface of the hexagonal adjustment rod (323); the vertical cross-section shapes of the positioning groove (324) and the positioning block (325) are both matching regular octagons.

5. The streamlined bow thruster grid structure according to claim 4, characterized in that: The effective rotation range of the driving gear (322) is the same as the maximum rotation range of the clamping strip (314), and the positioning block (325) and the positioning groove (324) just overlap when the driving gear (322) is at the initial and limit rotation angles.

6. The streamlined bow thruster grid structure according to claim 5, characterized in that: A T-shaped mounting groove (326) is formed at one end of the driving gear (322) close to the outer port of the side thrust cylinder (1); a T-shaped connecting block (327) fixedly connected to the inner wall of the T-shaped mounting groove (326) is slidably connected to the inner wall of the T-shaped connecting groove (326); and a spring (328) in contact with the T-shaped mounting groove (326) is fixedly connected to one end of the T-shaped connecting block (327) away from the outer port of the side thrust cylinder (1); the spring (328) is always in a compressed state.

7. The streamlined bow thruster grid structure according to claim 5, characterized in that: A sealing sleeve (329) is fixedly connected to the outer surface of the hexagonal adjusting rod (323); one end of the sealing sleeve (329) away from the outer port of the thrust cylinder (1) is fixedly connected to the mounting box (321); and the sealing sleeve (329) is a member made of nitrile rubber material.

8. The streamlined bow thruster grid structure according to claim 3, characterized in that: The blocking device (4) comprises barrier screens (41) that are evenly distributed and hinged to one end of the streamlined side-thrust grille (2) close to the outer port of the side-thrust cylinder (1); the hinged joint between the barrier screens (41) and the streamlined side-thrust grille (2) is arranged above the installation box (321); and a barrier filter (42) is embedded and installed on the inner surface of the barrier screen (41).

9. The streamlined bow thruster grid structure according to claim 8, characterized in that: The barrier mesh plate (41) and the barrier filter screen (42) are integrally formed, and the vertical cross-section formed by the barrier mesh plate (41) and the barrier filter screen (42) is in the shape of a one-way sawtooth, with the tip of the sawtooth facing downward, and the tip of the sawtooth is arranged at an end close to the outer port of the side thrust cylinder (1).

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