Grille blockage removing device of ship water jet propulsion device
By using a hydraulically driven composite bar screen device to cut and remove blockages from the ship's waterjet propulsion system, the problem of power loss caused by bar screen blockage was solved, achieving efficient and safe cleaning results.
Patent Information
- Application Number
- CN202520343137.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-02-28
AI Technical Summary
In existing technologies, the grids of ship waterjet propulsion devices are easily blocked by aquatic plants, branches, etc., causing the ship to lose power. Moreover, existing cleaning methods are labor-intensive, dangerous, or complex.
A composite bar screen device is used, in which a hydraulic cylinder pushes the sliding bar screen and the fixed bar screen to move relative to each other, cutting the blockage through shearing force, and then using water flow to remove the cut blockage.
It achieves efficient and safe removal of bar screen blockages, simplifies the cleaning process, reduces risks, and ensures the dynamic stability of the ship.
Smart Images
Figure CN223721133U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to ship water jet propulsion device cleaning technical field, specifically is a kind of ship water jet propulsion device grid blockage removal device. BACKGROUND
[0002] During flood season and dam discharge period of Jiejiang River, there are often a large amount of water grass, branches floating or suspended in river water, which makes the inlet grid of ship water jet propulsion device easily blocked, and further makes the ship lose power.
[0003] At present, the main way of cleaning the grid of ship water jet propulsion device is:
[0004] First, after the ship is docked during maintenance, the grid is cleaned by manual work. This method can only clean the blockage after the ship is docked when the grid is blocked, which is labor-intensive and complex. Moreover, if such a situation occurs during wartime, it is difficult to provide a ship for docking, and in severe cases, the ship may lose power.
[0005] Second, a diver is sent to remove the blockage underwater. This method is dangerous and can easily injure the diver. In addition, the dredging process is not very convenient and efficient. UTILITY MODEL CONTENT
[0006] The purpose of the utility model is to provide a ship water jet propulsion device grid blockage removal device to solve at least one of the above technical problems.
[0007] In the first aspect, the utility model embodiment provides a ship water jet propulsion device grid blockage removal device, which comprises a fixed frame, a composite grid and a hydraulic cylinder. The fixed frame is arranged below the water inlet of the ship water jet propulsion device. The composite grid comprises a fixed grid and a sliding grid. The grid bars of the fixed grid and the sliding grid are respectively provided with a knife angle, and the knife angles of the fixed grid and the sliding grid are oppositely arranged. The fixed grid is fixedly arranged in the fixed frame. Sliding grooves are arranged at both sides of the inside of the fixed frame. The two side edges of the sliding grid are respectively inserted into the sliding grooves. The lower surface of the sliding grid is arranged in close contact with the upper surface of the fixed grid. The hydraulic cylinder is arranged at the side of the fixed frame. The top shaft of the hydraulic cylinder is fixedly connected with the edge of the sliding grid. The sliding grid makes reciprocating cutting motion relative to the fixed grid under the push-pull action of the hydraulic cylinder.
[0008] Further, screw holes are arranged at the top of each frame of the fixed frame. The fixed frame is fixed to the position below the water inlet of the ship water jet propulsion device through the screw holes and bolts.
[0009] Further, the fixed frame is a rectangular frame with a hollow structure, and the fixed grid is fixed in the hollow structure of the fixed frame.
[0010] Further, the material of the composite grid comprises alloy tool steel.
[0011] Further, the number of the hydraulic cylinders is two, which are symmetrically arranged at two opposite sides of the fixed frame, and the top shafts of the two hydraulic cylinders are fixedly connected with two opposite sides of the sliding grid.
[0012] Further, the oil pipes of the two hydraulic cylinders are connected to a hydraulic oil tank and a rudder hydraulic pump through electromagnetic reversing valves, and the electromagnetic reversing valves are timing reversing electromagnetic valves for controlling the reciprocating movement of the top shafts of the hydraulic cylinders.
[0013] The utility model provides a kind of ship water jet propulsion device grid blockage removal device, relative motion is carried out by hydraulic cylinder to promote composite grid, and the shear force when relative motion of grid bar cutter angle is utilized to complete efficient cutting to blockage, and then blockage after cutting is re-traveled by water flow, reach the good cleaning effect of the water inlet blockage of ship water jet propulsion device, effectively solve the problem of blockage, alleviate the technical problems of complex process and great danger in prior art by manual operation mode. BRIEF DESCRIPTION OF DRAWINGS
[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the specific embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.
[0015] Figure 1 A structural schematic diagram of a ship water jet propulsion device grid blockage removal device provided by the utility model embodiment is shown in the figure.
[0016] Figure 2 A three-dimensional schematic diagram of a fixed frame provided by the utility model embodiment is shown in the figure.
[0017] Figure 3 A structural schematic diagram of a fixed grid provided by the utility model embodiment is shown in the figure.
[0018] Figure 4 A structural schematic diagram of a sliding grid provided by the utility model embodiment is shown in the figure.
[0019] Figure 5 A side sectional view of the position of composite grid before cutting operation provided by the utility model embodiment is shown in the figure.
[0020] Figure 6 A side sectional view of the position of the composite grid during a cutting operation, provided for an embodiment of this utility model;
[0021] Figure 7 A schematic diagram of a hydraulic control system provided for an embodiment of this utility model.
[0022] In the diagram: 1. Fixed frame, 11. Slide groove, 12. Screw hole, 2. Composite grille, 21. Fixed grille, 22. Sliding grille, 3. Hydraulic cylinder, 31. Top shaft, 32. Electromagnetic directional valve, 33. Hydraulic oil tank, 34. Steering gear hydraulic pump. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.
[0024] Figure 1 This is a structural schematic diagram of a screen blockage removal device for a ship's waterjet propulsion system, provided according to an embodiment of this utility model. Figure 1 As shown, the device includes: a fixed frame 1, a composite bar screen 2, and a hydraulic cylinder 3; wherein, the fixed frame 1 is located below the water inlet of the ship's water jet propulsion device, and the composite bar screen 2 includes a fixed bar screen 21 and a sliding bar screen 22, the bars of the fixed bar screen 21 and the sliding bar screen 22 are respectively provided with blades, and the blades of the fixed bar screen 21 and the sliding bar screen 22 are arranged opposite to each other.
[0025] Specifically, the fixed grille 21 is fixedly installed inside the fixed frame 1.
[0026] Figure 2 This is a three-dimensional schematic diagram of a fixed frame provided according to an embodiment of the present utility model. For example... Figure 2 As shown, sliding grooves 11 are provided on both sides inside the fixed frame 1, and the two sides of the sliding grille 22 are respectively inserted into the sliding grooves 11, and the lower surface of the sliding grille 22 is attached to the upper surface of the fixed grille 21.
[0027] Specifically, such as Figure 1 As shown, the hydraulic cylinder 3 is located on the side of the fixed frame 1, and the top shaft 31 of the hydraulic cylinder 3 is fixedly connected to the edge of the sliding grille 22; the sliding grille 22 performs reciprocating cutting motion relative to the fixed grille 21 under the pushing and pulling action of the hydraulic cylinder 3.
[0028] Specifically, such asFigure 2 As shown in the drawings, the fixed frame 1 is a rectangular frame with a hollow structure, and the fixed grid 21 is fixed to the hollow structure of the fixed frame 1. The sliding groove 11 is arranged at the long side of the rectangular frame, and the hydraulic cylinder 3 is arranged at the short side of the rectangular frame.
[0029] Screw holes 12 are arranged at the top of each frame of the fixed frame 1, and the fixed frame 1 is fixed below the water inlet of the water jet propulsion device through the screw holes 12 and bolts.
[0030] In the embodiment of the utility model, the fixed frame 1 mainly plays three roles: first, the sliding groove for reciprocating movement of the fixed frame 1 is arranged at the long side of the fixed frame 1, which plays the role of fixing the movement position of the sliding grid 22 in the fixed frame 1, and ensures the normal reciprocating cutting movement of the sliding grid 22; second, it plays the role of fixing the specific position of the fixed grid 21, the hydraulic cylinder 3 and other parts in the whole device; third, the screw holes 12 arranged at the top of the fixed frame 1 are installed to fix the whole device directly below the water inlet of the water jet propulsion device.
[0031] In some optional embodiments provided by the embodiment of the utility model, the material of the composite grid 2 includes alloy tool steel. Preferably, the material of the composite grid 2 is selected from 9SiCr alloy tool steel, and the structure is composed of two layers of grid bars with knife corners, mutual adhesion and reciprocating movement.
[0032] Figure 3 It is a structure schematic view of a fixed grid according to the embodiment of the utility model, Figure 4 It is a structure schematic view of a sliding grid according to the embodiment of the utility model. As shown in Figure 3 And Figure 4 As shown in the drawings, the shapes and sizes of the fixed grid 21 and the sliding grid 22 are consistent.
[0033] Figure 5 It is a side sectional view of the position of the composite grid before cutting operation according to the embodiment of the utility model. Among them, Figure 5 The upper row of grid bars in the drawings are the grid bars of the fixed grid 21, and the lower row of grid bars are the grid bars of the sliding grid 22. As shown in Figure 5 At the initial position before cutting, the corresponding grid bars of the fixed grid 21 and the sliding grid 22 overlap each other, and at this time the composite grid forms a whole grid, which plays the role of preventing most sundries from entering the water jet propeller during the daily navigation of the ship.
[0034] Figure 6 It is a side sectional view of the position of the composite grid during cutting operation according to the embodiment of the utility model. Among them, Figure 6The upper row of the grid bars in the figure is the grid bar of the fixed grid 21, and the lower row of the grid bars is the grid bar of the sliding grid 22. Figure 6 As shown in the figure, when the water inlet grid of the water jet propulsion device is blocked, the sliding grid 22 performs a cutting motion relative to the fixed grid 21, and the cutting angle is used to cut the blockage that is wound and blocked in the gap between the grid bars.
[0035] Specifically, as shown in the figure, the number of the hydraulic cylinders 3 is two, and the two hydraulic cylinders 3 are symmetrically arranged at two opposite positions of the fixed frame 1; the top shafts 31 of the two hydraulic cylinders 3 are respectively fixedly connected with two opposite sides of the sliding grid 22. Figure 1
[0036] Figure 7 According to the embodiment of the utility model, a kind of hydraulic control system principle diagram is provided.The oil pipes of two hydraulic cylinders 3 are respectively connected to hydraulic oil tank 33 and rudder hydraulic pump 34 through electromagnetic reversing valve 32;Wherein, electromagnetic reversing valve 32 is the electromagnetic valve of fixed time reversal, for controlling the reciprocating motion of the top shaft 31 of hydraulic cylinder 3. Figure 7
[0037] Specifically, the utility model embodiment utilizes the rudder hydraulic pump 34 of ship, and sets the electromagnetic reversing valve 32 of fixed time reversal in inlet and outlet pipeline, controls the inlet and outlet direction of pipeline hydraulic oil, to realize control hydraulic cylinder 3 motion stroke and reciprocating motion.This utility model embodiment is the power source of whole blockage removal device work by the hydraulic force acting on the top pin device directly contacted by sliding grid 22, and then sliding grid 22 is pushed to reciprocate cutting motion.
[0038] Specifically, when the water inlet grid of the water jet propulsion device is blocked, the crew starts rudder hydraulic pump 34, so that hydraulic oil is supplied to two hydraulic cylinders 3 through hydraulic oil pipe, so that it is pressed from top to bottom operation.At this time, the top shaft 31 of hydraulic cylinder 3 is pressed out, and the sliding grid 22 is pressed out, and the sliding grid 22 moves relative to the fixed grid 21 under the action of hydraulic pressure.At the same time, the cutting angle of the sliding grid 22 and the cutting angle of the fixed grid 21 perform shearing motion, and the blockage wound and blocked in the gap between the grid bars is cut.When electromagnetic reversing valve 32 is reversed, sliding grid 22 moves reversely and returns to the initial position, and then electromagnetic reversing valve 32 is reversed again, and sliding grid 22 performs repeated shearing motion.
[0039] From the above description, the utility model embodiment provides a kind of blockage removal device of ship water jet propulsion device grid, which has the following technical effects compared with prior art:
[0040] 1. The cutting is less limited. The device provided by the utility model cuts by using hydraulic cylinder to punch when cutting, the shearing force is larger when the knife angle moves relatively, most of the blockages can be fully and efficiently cut, and the speed is low when moving, compared with the cutting mode driven by the transmission motor, the device is not limited by the moving speed.
[0041] 2. The transmission device is simple. The device provided by the utility model uses hydraulic cylinders as power devices, and only needs to provide oil supply pipelines to the two hydraulic cylinders to work normally, compared with the transmission motor driven device, there is no complex electrical and mechanical rotating system, on the one hand, the structure of the designed device is simplified, and on the other hand, the possible failure of the device is reduced, and the reliability and stability of the device are improved.
[0042] 3. The influence is small. The transmission device and the weight of the device provided by the utility model are small, and when not working, the device can be regarded as a normally arranged water inlet grille, the water inlet grille is not blocked by the device, the water inlet efficiency of the water inlet grille is not affected, and the device is a small external auxiliary mechanism, and the device can work normally by being attached to the periphery of the water inlet grille of the ship, and the original technical performance of the ship is not affected.
[0043] 4. The device is light in weight. The device provided by the utility model is simple in structure design, and the actual device weight is not more than ten kilograms, compared with the weight of the whole ship, the weight of the device has relatively small influence on the whole ship, the adverse influence of the device on the ship is avoided, and the actual working requirement is met.
[0044] For those skilled in the art, it is obvious that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims.
[0045] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can be combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A grid clog removal device for a waterjet propulsion unit of a marine vessel, characterized by, The utility model relates to a kind of composite grating of water inlet of ship water jet propulsion device, including: Fixed frame, composite grating and hydraulic cylinder;Wherein, the fixed frame is arranged in the position below the water inlet of ship water jet propulsion device, the composite grating includes fixed grating and sliding grating, the fixed grating and the sliding grating are respectively opened with the blade angle of grating strip, and the fixed grating and the blade angle of the sliding grating are oppositely arranged; The fixed grating is fixedly arranged in the fixed frame, sliding slot is arranged in the inside both sides of the fixed frame, and the both sides of the sliding grating are respectively inserted into the sliding slot, and the lower surface of the sliding grating is attached to the upper surface of the fixed grating; The hydraulic cylinder is arranged in the side position of the fixed frame, and the top shaft of the hydraulic cylinder is fixedly connected with the edge of the sliding grating;The sliding grating does reciprocating cutting motion relative to the fixed grating under the push-pull action of the hydraulic cylinder.
2. A marine waterjet grillage block removal device according to claim 1, characterised in that: Screw hole is arranged in the top of each frame of the fixed frame, and the fixed frame is fixed in the position below the water inlet of ship water jet propulsion device by screw hole and bolt cooperation.
3. The marine waterjet propulsion unit grillage blockage removal device of claim 1, wherein: The fixed frame is rectangular frame, and the inside is hollow structure, and the fixed grating is fixed in the hollow structure position of the fixed frame.
4. The marine waterjet propulsion unit grillage blockage removal device of claim 1, wherein: The material of the composite grating includes alloy tool steel.
5. The marine waterjet propulsion unit grillage blockage removal device of claim 1, wherein: The number of the hydraulic cylinder is two, and it is symmetrically arranged in the two opposite edge positions of the fixed frame;The top shaft of two hydraulic cylinders is respectively fixedly connected with two opposite edges of the sliding grating.
6. A marine waterjet propulsion unit grillage blockage removal device according to claim 5, characterised in that: The oil pipe of two hydraulic cylinders is respectively connected into hydraulic oil tank and rudder hydraulic pump through electromagnetic reversing valve;The electromagnetic reversing valve is timing reversing electromagnetic valve, for controlling the reciprocating motion of the top shaft of the hydraulic cylinder.