Anti-winding detachable water inlet grille structure of water jet propeller

Abstract

The utility model discloses a kind of anti-winding detachable water-injection water screen structure of water jet propeller, including propeller body, the bottom surface of propeller body is fixedly connected square tube, square tube is located just below the water inlet of propeller body, the bottom surface of square tube is equipped with grid body, the lateral surface of square tube is equipped with through slot, sealing plate is slidably connected in through slot, sealing plate is slidably connected below propeller body, the bottom surface of sealing plate is equipped with receiving groove, cleaning element is slidably connected in receiving groove. The utility model is through setting the cleaning element that can automatic reciprocating, the cleaning block on it can be in-depth every gap of grid body, and the flexible sundries of attachment or winding are forcedly scraped and cleaned. This initiative type cleaning has solved the problem of sundries winding and jamming from root, ensure that water inlet passage is always unobstructed, thereby guarantee the working efficiency and water power performance of water jet propeller, avoid the thrust loss and fuel economy deterioration caused by insufficient flow.

Description

Technical Field

[0001] This utility model relates to the field of water jet propulsion technology, and in particular to an anti-entanglement detachable water jet propulsion inlet grid structure. Background Technology

[0002] The thrust of a waterjet propulsion system is obtained through the reaction force of the water jet ejected by the propulsion pump. Ship maneuvering is achieved by distributing and changing the direction of the jet using rudders and reversing devices. It is commonly used in underwater robots, ships, powered water skis, and other underwater projects. The inlet grille is a critical protective component at the water jet inlet of the waterjet propulsion system. Its main function is to prevent large foreign objects from being sucked into the flow channel, thus avoiding mechanical damage to the high-speed rotating impeller.

[0003] However, in practical applications, especially in complex aquatic environments, traditional or existing designs are often problematic. Traditional bar screens typically consist of a set of fixed, closely spaced parallel bars. When navigating waters rich in aquatic plants, algae, aquaculture areas, or floating debris, these flexible objects can easily become entangled in the bars. Once entanglement occurs, it can severely block the water intake channels, resulting in insufficient water flow, a sharp drop in water pump efficiency, an increase in engine speed but a decrease in boat speed, a huge loss of thrust, and a deterioration in fuel economy. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing an anti-entanglement detachable water jet propulsion inlet grid structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an anti-tangling detachable water jet propeller inlet grille structure, comprising a propeller body, a square tube fixedly connected to the bottom surface of the propeller body, the square tube being located directly below the water inlet of the propeller body, a grille body being provided on the bottom surface of the square tube, a through groove being opened on the side of the square tube, a sealing plate being slidably connected in the through groove, the sealing plate being slidably connected below the propeller body, a storage groove being provided on the bottom surface of the sealing plate, and a cleaning component being slidably connected in the storage groove.

[0006] As a further description of the above technical solution: four fixing blocks are symmetrically fixed on the outer side of the grid body, and a screw is vertically fixed on the top surface of the fixing blocks. The screw slides through the propeller body, and a nut is threaded on the outer edge of the screw, and the nut abuts against the top surface of the propeller body.

[0007] As a further description of the above technical solution: two first cylinders are symmetrically fixed to the outside of the square tube, and a support plate is fixedly connected to the end of the piston rod of each of the two first cylinders. The support plate is fixed to the outside of the sealing plate.

[0008] As a further description of the above technical solution: the cleaning component includes a lifting block that is vertically connected to the storage slot. A second cylinder is embedded in the top surface of the lifting block. The piston rod end of the second cylinder is fixedly connected to the top wall of the storage slot. A guide plate is slidably connected to the bottom surface of the lifting block. A plurality of U-shaped plates are fixedly connected to the bottom surface of the guide plate. A baffle is slidably connected inside the U-shaped plate. A cleaning block is provided between two adjacent U-shaped plates. The cleaning block is fixed to the bottom surface of the guide plate by bolts.

[0009] As a further description of the above technical solution: a guide groove is opened on the bottom surface of the lifting block, a guide block is slidably connected in the guide groove, a reciprocating screw is threaded through the side of the guide block, one end of the reciprocating screw is rotatably connected in the guide groove, and the other end is drivenly connected to a drive motor, the drive motor is fixed in the guide groove.

[0010] As a further description of the above technical solution: two symmetrical grooves are opened on the inner side of the U-shaped plate, and a slider is slidably connected in the groove. The slider is fixedly connected to the baffle. Multiple springs are fixed between the baffle and the U-shaped plate. A cleaning block is provided above each gap of the grid body. The U-shaped plate is aligned with the grid bars of the grid body.

[0011] As a further description of the above technical solution: the bottom surface of the cleaning block is fixedly connected to a base plate, the bottom surface of the base plate has a through countersunk hole, the top surface of the cleaning block has multiple through holes, a sleeve is fitted inside the through holes, the sleeve is fixed to the top surface of the base plate and communicates with the countersunk hole, the bottom surface of the guide plate has a positioning groove, the end of the sleeve is engaged in the positioning groove, the top wall of the positioning groove has a threaded groove, the bolt is fitted inside the sleeve and threadedly connected in the threaded groove.

[0012] This utility model has the following beneficial effects:

[0013] 1. Compared with existing technologies, this anti-entanglement detachable waterjet propeller inlet grille structure, through the inclusion of automatically reciprocating cleaning components, features cleaning blocks that penetrate deep into every gap of the grille body to forcibly scrape and clean any attached or entangled flexible debris. This active cleaning method fundamentally solves the problem of debris entanglement and blockage, ensuring that the water inlet channel remains unobstructed. This guarantees the working efficiency and hydrodynamic performance of the waterjet propeller, avoiding thrust loss and fuel economy deterioration due to insufficient flow. When not in operation, the cleaning components can be completely stored in the storage groove of the sealing plate, which, driven by a cylinder, can seal the through-slots on the side of the square tube. This design isolates the cleaning system from the water flow when not in operation, preventing it from adversely affecting the smoothness of the water inlet and preventing water flow impact from damaging the cleaning mechanism. This ensures the integrity of the internal flow channels and hydrodynamic characteristics of the propeller body.

[0014] 2. Compared with existing technologies, this anti-entanglement detachable waterjet propeller inlet grille structure features a simple and reliable structure where the grille body is fixed to the propeller body with screws and nuts. When the grille becomes severely clogged due to extreme conditions or requires complete overhaul, maintenance personnel do not need to perform complex operations underwater or in confined spaces. They can simply unscrew the nuts to quickly remove the entire grille body from the square tube for cleaning or replacement, greatly reducing maintenance difficulty, time, and labor costs. The cleaning blocks are individually fixed with bolts, and when a cleaning block is worn or damaged, it can be replaced individually without replacing the entire cleaning assembly, further reducing long-term maintenance costs. Attached Figure Description

[0015] Figure 1 This is a three-dimensional view of the overall structure of an anti-entanglement detachable water jet propulsion inlet grid structure proposed in this utility model.

[0016] Figure 2 This utility model proposes an anti-entanglement detachable water jet propulsion inlet grid structure. Figure 1 Enlarged view of the structure at point A in the middle;

[0017] Figure 3 This utility model proposes an anti-entanglement detachable water jet propulsion inlet grid structure. Figure 1 Enlarged view of the structure at point B;

[0018] Figure 4 This is a front view of the overall structure of an anti-entanglement detachable water jet propulsion inlet grid structure proposed in this utility model;

[0019] Figure 5 This is a main sectional view of the connection between the sealing plate and the square tube in an anti-entanglement detachable water jet propulsion inlet grid structure proposed in this utility model.

[0020] Figure 6 This is a side sectional view of the connection between the sealing plate and the square plate of the anti-entanglement detachable water jet propulsion inlet grid structure proposed in this utility model;

[0021] Figure 7 This utility model proposes an anti-entanglement detachable water jet propulsion inlet grid structure. Figure 6 Enlarged view of the structure at point C.

[0022] Legend:

[0023] 1. Thruster body; 2. Sealing plate; 3. Support plate; 4. First cylinder; 5. Screw; 6. Nut; 7. Square tube; 8. Grille body; 9. Fixing block; 10. Storage slot; 11. Lifting block; 12. Drive motor; 13. Guide slot; 14. Guide block; 15. Reciprocating screw; 16. Guide plate; 17. U-shaped plate; 18. Through slot; 19. Baffle; 20. Spring; 21. Second cylinder; 22. Bolt; 23. Countersunk hole; 24. Base plate; 25. Cleaning block; 26. Through hole; 27. Sleeve; 28. Positioning slot; 29. ​​Threaded groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Reference Figures 1 to 7 This utility model provides an anti-entanglement detachable water jet propulsion inlet grid structure: including a propulsion body 1, a square tube 7 fixedly connected to the bottom surface of the propulsion body 1, the square tube 7 being located directly below the water inlet of the propulsion body 1, a grid body 8 provided on the bottom surface of the square tube 7, a through groove 18 opened on the side of the square tube 7, a sealing plate 2 slidably connected in the through groove 18, the sealing plate 2 slidably connected below the propulsion body 1, a storage groove 10 provided on the bottom surface of the sealing plate 2, a cleaning component slidably connected in the storage groove 10, four fixing blocks 9 symmetrically fixed on the outside of the grid body 8, a screw 5 vertically fixed on the top surface of the fixing blocks 9, the screw 5 slidably penetrating the propulsion body 1, a nut 6 threaded on the outer edge of the screw 5, the nut 6 abutting against the top surface of the propulsion body 1, two first cylinders 4 symmetrically fixed on the outside of the square tube 7, a support plate 3 fixedly connected to the end of the piston rod of each of the two first cylinders 4, the support plate 3 being fixed on the outside of the sealing plate 2;

[0026] The cleaning component includes a lifting block 11 that is vertically connected within a storage slot 10. A second cylinder 21 is embedded in the top surface of the lifting block 11, and the piston rod end of the second cylinder 21 is fixedly connected to the top wall of the storage slot 10. A guide plate 16 is slidably connected to the bottom surface of the lifting block 11, and multiple equidistantly distributed U-shaped plates 17 are fixedly connected to the bottom surface of the guide plate 16. A baffle 19 is slidably connected inside the U-shaped plate 17, and two sliding grooves are symmetrically opened on the inner side of the U-shaped plate 17. A slider is slidably connected inside the sliding groove, and the slider is fixedly connected to the baffle 19. Multiple springs 20 are fixed together between the baffle 19 and the U-shaped plate 17. A cleaning block 25 is provided above each gap of the main body 8. The U-shaped plate 17 is aligned with the grid bars of the grid body 8. A cleaning block 25 is provided between two adjacent U-shaped plates 17. The cleaning block 25 is fixed to the bottom surface of the guide plate 16 by bolts 22. A guide groove 13 is opened on the bottom surface of the lifting block 11. A guide block 14 is slidably connected in the guide groove 13. A reciprocating screw 15 is threaded through the side of the guide block 14. One end of the reciprocating screw 15 is rotatably connected in the guide groove 13, and the other end is connected to the drive motor 12. The drive motor 12 is fixed in the guide groove 13.

[0027] The bottom surface of the cleaning block 25 is fixedly connected to the base plate 24. The bottom surface of the base plate 24 has a through-hole 23. The top surface of the cleaning block 25 has multiple through holes 26. A sleeve 27 is fitted inside the through holes 26. The sleeve 27 is fixed to the top surface of the base plate 24 and communicates with the through hole 23. A positioning groove 28 is opened on the bottom surface of the guide plate 16. The end of the sleeve 27 is snapped into the positioning groove 28. A threaded groove 29 is opened on the top wall of the positioning groove 28. A bolt 22 is fitted inside the sleeve 27 and threaded into the threaded groove 29.

[0028] Working principle: During normal navigation, the first cylinder 4 retracts, pulling the support plate 3 and causing the sealing plate 2 to slide outwards towards the square tube 7 until it completely covers and seals the through groove 18 on the side of the square tube 7. At the same time, the entire cleaning component is lifted and completely stored in the storage groove 10 of the sealing plate 2. Water flows normally from the bottom of the ship and is filtered through the gaps in the grille body 8. Large foreign objects are blocked outside. The clean water flows through the square tube 7 and the water inlet of the propeller body 1 in sequence, is sucked in by the water pump and sprayed out to generate thrust. In this state, the grille works as a static filter, the cleaning system does not participate in the work, and there is no interference with the water flow, ensuring water intake efficiency.

[0029] When cleaning of the grating body 8 is required, the vessel stops sailing. Then, the first cylinder 4 pulls the sealing plate 2 through the through-slot 18 into the square tube 7, sealing the inlet of the propeller body 1. Next, the second cylinder 21 lowers the lifting block 11, which in turn lowers the guide plate 16, making the top surface of the guide plate 16 flush with the bottom surface of the sealing plate 2. Simultaneously, the cleaning block 25 is inserted into the gaps of the grating body 8, and the baffle 19 abuts against the top surface of the grating bars. The spring 20 is compressed. Then, the drive motor 12 rotates the reciprocating screw 15, which in turn moves the guide block 14 back and forth within the guide groove 13. The cleaning block 25 cleans the dirt in the gaps of the grating body 8. After cleaning is complete, the drive motor 12 stops. The second cylinder 21 drives the lifting block 11 and the guide plate 16 to rise, so that the cleaning block 25 is retracted into the storage groove 10. Then the first cylinder 4 moves the sealing plate 2 out of the square tube 7 from the through groove 18, releasing the seal of the sealing plate 2 on the water inlet of the propeller body 1. When the cleaning block 25 needs to be replaced, rotate the bolt 22 to separate the bolt 22 from the guide plate 16. Then the bottom plate 24 is connected to the cleaning block 25 and taken out from the storage groove 10. Then the new cleaning block 25 is installed into the storage groove 10, so that the end of the sleeve 27 is inserted into the positioning groove 28 on the bottom surface of the guide plate 16. Then the bolt 22 is fitted into the countersunk hole 23 and the sleeve 27. Then the bolt 22 is rotated so that the end of the bolt 22 is screwed into the threaded groove 29 to fix the cleaning block 25.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A detachable, anti-entanglement water jet propulsion inlet grid structure, comprising a propulsion body (1), characterized in that: A square tube (7) is fixedly connected to the bottom surface of the propeller body (1). The square tube (7) is located directly below the water inlet of the propeller body (1). A grid body (8) is provided on the bottom surface of the square tube (7). A through groove (18) is opened on the side of the square tube (7). A sealing plate (2) is slidably connected in the through groove (18). The sealing plate (2) is slidably connected below the propeller body (1). A storage groove (10) is provided on the bottom surface of the sealing plate (2). A cleaning component is slidably connected in the storage groove (10).

2. The anti-entanglement detachable water jet propulsion inlet grid structure according to claim 1, characterized in that: Four fixing blocks (9) are symmetrically fixed on the outer side of the grid body (8). The top surface of the fixing block (9) is vertically fixed with a screw (5). The screw (5) slides through the propeller body (1). The outer edge of the screw (5) is threaded with a nut (6). The nut (6) abuts against the top surface of the propeller body (1).

3. The anti-entanglement detachable water jet propulsion inlet grid structure according to claim 1, characterized in that: Two first cylinders (4) are symmetrically fixed to the outside of the square tube (7). The piston rod ends of the two first cylinders (4) are fixedly connected to a support plate (3). The support plate (3) is fixed to the outside of the sealing plate (2).

4. The anti-entanglement detachable water jet propulsion inlet grid structure according to claim 1, characterized in that: The cleaning component includes a lifting block (11) that is lifted and connected within the storage slot (10). A second cylinder (21) is embedded in the top surface of the lifting block (11). The piston rod end of the second cylinder (21) is fixedly connected to the top wall of the storage slot (10). A guide plate (16) is slidably connected to the bottom surface of the lifting block (11). A plurality of U-shaped plates (17) are fixedly connected to the bottom surface of the guide plate (16). A baffle (19) is slidably connected inside the U-shaped plate (17). A cleaning block (25) is provided between two adjacent U-shaped plates (17). The cleaning block (25) is fixed to the bottom surface of the guide plate (16) by bolts (22).

5. The anti-entanglement detachable water jet propulsion inlet grid structure according to claim 4, characterized in that: The bottom surface of the lifting block (11) has a guide groove (13), and a guide block (14) is slidably connected in the guide groove (13). A reciprocating screw (15) is threaded through the side of the guide block (14). One end of the reciprocating screw (15) is rotatably connected in the guide groove (13), and the other end is connected to a drive motor (12). The drive motor (12) is fixed in the guide groove (13).

6. The anti-entanglement detachable waterjet propeller inlet grid structure according to claim 4, characterized in that: Two symmetrical grooves are opened on the inner side of the U-shaped plate (17), and a slider is slidably connected in the groove. The slider is fixedly connected to the baffle (19). Multiple springs (20) are fixed between the baffle (19) and the U-shaped plate (17). A cleaning block (25) is provided above each gap of the grid body (8). The U-shaped plate (17) is aligned with the grid bars of the grid body (8).

7. The anti-entanglement detachable water jet propulsion inlet grid structure according to claim 4, characterized in that: The bottom surface of the cleaning block (25) is fixedly connected to the base plate (24). The bottom surface of the base plate (24) has a countersunk hole (23) through it. The top surface of the cleaning block (25) has multiple through holes (26) through it. A sleeve (27) is fitted inside the through hole (26). The sleeve (27) is fixed to the top surface of the base plate (24) and communicates with the countersunk hole (23). The bottom surface of the guide plate (16) has a positioning groove (28). The end of the sleeve (27) is engaged in the positioning groove (28). The top wall of the positioning groove (28) has a threaded groove (29). The bolt (22) is fitted inside the sleeve (27) and threadedly connected to the threaded groove (29).

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