Grille blockage removing device of ship water jet propulsion device

Abstract

The invention discloses a grid blockage removing device for a ship water jet propulsion device, which relates to the technical field of ship water jet propulsion device cleaning and comprises a fixed frame, a composite grid and a hydraulic cylinder, wherein the fixed frame is arranged below a water inlet of the ship water jet propulsion device, the composite grille comprises a fixed grille and a sliding grille, grid bars of the fixed grille and the sliding grille are respectively provided with a cutter angle, and the cutter angles of the fixed grille and the sliding grille are oppositely arranged; the fixed grating is fixedly arranged in the fixed frame, sliding grooves are formed in the two sides of the interior of the fixed frame, and the two side edges of the sliding grating are inserted into the sliding grooves correspondingly. The hydraulic cylinder is arranged on the side edge of the fixed frame, and a top shaft of the hydraulic cylinder is fixedly connected with the edge of the sliding grating; and the sliding grating does reciprocating cutting motion relative to the fixed grating under the push-pull action of the hydraulic cylinder. The technical problems that in the prior art, a manual operation mode is complex in process and high in dangerousness are solved.

Description

Technical Field

[0001] The invention relates to the technical field of cleaning a ship water jet propulsion device, and in particular to a device for removing blockages from a grille of a ship water jet propulsion device. Background Art

[0002] During the flood season of boundary rivers and dam discharge, there are often a large number of aquatic plants and branches floating or suspended in the river waters, which can easily clog the water inlet grilles of the ship's water jet propulsion device, causing the ship to lose power.

[0003] At present, the main methods for cleaning the grilles of ship water jet propulsion devices are:

[0004] One is to manually clean the grille after the ship is on the raft during maintenance. This method requires that the ship must be on the raft before the raft is blocked. This method requires a lot of work and a complicated process. Moreover, if such a situation occurs during wartime, it is difficult to provide the ship with a raft. In serious cases, the ship may lose power.

[0005] The second method is to use diving to designate divers to enter the water to remove the blockage. This method is very dangerous and can easily cause harm to the divers. At the same time, the dredging process is not very convenient and quick. Summary of the invention

[0006] The purpose of the present invention is to provide a device for removing blockages from a grille of a ship water jet propulsion device in order to solve at least one of the above-mentioned technical problems.

[0007] In a first aspect, an embodiment of the present invention provides a device for removing blockages from a grille of a ship water jet propulsion device, comprising: a fixed frame, a composite grille and a hydraulic cylinder; wherein the fixed frame is arranged below the water inlet of the ship water jet propulsion device, the composite grille comprises a fixed grille and a sliding grille, the bars of the fixed grille and the sliding grille are respectively provided with knife angles, and the knife angles of the fixed grille and the sliding grille are arranged relative to each other; the fixed grille is fixedly arranged in the fixed frame, and sliding grooves are arranged at both sides of the fixed frame, and both side edges of the sliding grille are respectively inserted into the sliding grooves, and the lower surface of the sliding grille is arranged in contact with the upper surface of the fixed grille; the hydraulic cylinder is arranged at the side position of the fixed frame, and the top shaft of the hydraulic cylinder is fixedly connected to the edge of the sliding grille; the sliding grille performs reciprocating cutting motion relative to the fixed grille under the push and pull action of the hydraulic cylinder.

[0008] Furthermore, screw holes are arranged on the top of each frame of the fixing frame, and the fixing frame is fixed to a position below the water inlet of the ship water jet propulsion device through the screw holes and bolts.

[0009] Furthermore, the fixed frame is a rectangular frame with a hollow structure inside, and the fixed grid is fixed to the hollow structure position of the fixed frame.

[0010] Furthermore, the material of the composite grid includes alloy tool steel.

[0011] Furthermore, there are two hydraulic cylinders, which are symmetrically arranged at two opposite sides of the fixed frame; and the top shafts of the two hydraulic cylinders are fixedly connected to the two opposite sides of the sliding grille respectively.

[0012] Furthermore, the oil pipes of the two hydraulic cylinders are respectively connected to the hydraulic oil tank and the steering gear hydraulic pump through electromagnetic reversing valves; the electromagnetic reversing valve is a timed reversing electromagnetic valve used to control the reciprocating motion of the top shaft of the hydraulic cylinder.

[0013] The present invention provides a device for removing blockages from a grille of a ship's water jet propulsion device. A composite grille is pushed to move relative to the grille by a hydraulic cylinder, and the shear force during the relative movement of the grille bar blade angles is utilized to efficiently cut the blockages. The cut blockages are then removed again by water flow, thereby achieving a good effect of clearing blockages from the water inlet of the ship's water jet propulsion device, effectively solving the blockage problem, and alleviating the technical problems of complex procedures and high risks in the prior art through manual operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 A schematic structural diagram of a device for removing blockage from a grille of a marine water jet propulsion device provided by an embodiment of the present invention;

[0016] Figure 2 A three-dimensional schematic diagram of a fixing frame provided in an embodiment of the present invention;

[0017] Figure 3 A structural schematic diagram of a fixed grid provided by an embodiment of the present invention;

[0018] Figure 4 A schematic structural diagram of a sliding grille provided by an embodiment of the present invention;

[0019] Figure 5 A side cross-sectional view of a composite grille position before cutting operation provided by an embodiment of the present invention;

[0020] Figure 6 A side cross-sectional view of the position of a composite grille during a cutting operation provided by an embodiment of the present invention;

[0021] Figure 7 A schematic diagram of a hydraulic control system provided in an embodiment of the present invention.

[0022] In the figure: 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 reversing valve, 33, hydraulic oil tank, 34, steering gear hydraulic pump. DETAILED DESCRIPTION

[0023] 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.

[0024] Figure 1 1 is a schematic diagram of the structure of a device for removing blockage from a grille of a marine water jet propulsion device according to an embodiment of the present invention. Figure 1 As shown, the device includes: a fixed frame 1, a composite grille 2 and a hydraulic cylinder 3; wherein the fixed frame 1 is arranged below the water inlet of the ship water jet propulsion device, the composite grille 2 includes a fixed grille 21 and a sliding grille 22, the bars of the fixed grille 21 and the sliding grille 22 are respectively provided with knife angles, and the knife angles of the fixed grille 21 and the sliding grille 22 are arranged relative to each other.

[0025] Specifically, the fixed grid 21 is fixedly disposed in the fixed frame 1 .

[0026] Figure 2 is a three-dimensional schematic diagram of a fixing frame provided according to an embodiment of the present invention. Figure 2 As shown, slide grooves 11 are arranged at both sides of the fixed frame 1 , and both sides of the sliding grille 22 are respectively inserted into the slide grooves 11 , and the lower surface of the sliding grille 22 is arranged to fit the upper surface of the fixed grille 21 .

[0027] Specifically, Figure 1 As shown, the hydraulic cylinder 3 is arranged at 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 push and pull action of the hydraulic cylinder 3.

[0028] Specifically, Figure 2As shown, the fixed frame 1 is a rectangular frame with a hollow structure inside, and the fixed grid 21 is fixed to the hollow structure of the fixed frame 1. The slide 11 is arranged at both sides of 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 on the top of each frame of the fixed frame 1, and the fixed frame 1 is fixed to a position below the water inlet of the ship water jet propulsion device through the screw holes 12 and bolts.

[0030] In the embodiment of the present invention, the fixed frame 1 mainly plays three roles: first, by providing sliding grooves for the reciprocating movement of the sliding grille 22 on both sides of the long sides inside the fixed frame 1, it plays a role in fixing the moving position of the sliding grille 22 in the fixed frame 1, ensuring that the sliding grille 22 can perform normal reciprocating cutting movement; second, it plays a role in fixing the specific positions of parts such as the fixed grille 21 and the hydraulic cylinder 3 in the entire device; third, the screw hole 12 installed at the top of the fixed frame 1 fixes the entire device to the bottom of the water inlet of the recommended water spray device.

[0031] In some optional implementations provided by the embodiments of the present invention, the composite grille 2 is made of alloy tool steel. Preferably, the composite grille 2 is made of 9SiCr alloy tool steel, and the structure consists of two layers of grilles with knife angles, which fit each other and can reciprocate.

[0032] Figure 3 is a schematic structural diagram of a fixed grid provided according to an embodiment of the present invention, Figure 4 Schematic diagram of a sliding grille according to an embodiment of the present invention. Figure 3 and Figure 4 As shown, the fixed grille 21 and the sliding grille 22 are consistent in shape and size.

[0033] Figure 5 1 is a side cross-sectional view of a composite grille before cutting provided by an embodiment of the present invention. Figure 5 The upper row of bars in the figure is the bars of the fixed grille 21, and the lower row of bars is the bars of the sliding grille 22. Figure 5 As shown, in the initial position before cutting, the corresponding bars of the fixed grille 21 and the sliding grille 22 overlap each other, and the composite grille as a whole forms a grille, which plays a role in blocking most debris from entering the water jet propulsion during daily navigation of the ship.

[0034] Figure 6 1 is a side cross-sectional view of a composite grille position during a cutting operation provided by an embodiment of the present invention. Figure 6 The upper row of bars in the figure is the bars of the fixed grille 21, and the lower row of bars is the bars of the sliding grille 22. Figure 6As shown, when the water jet propulsion device water inlet grille is blocked, the sliding grille 22 performs a cutting motion relative to the fixed grille 21, and uses the knife angle to cut the blockage, cutting the blockage that is entangled and stuck in the gap between the grille bars.

[0035] Specifically, Figure 1 As shown, there are two hydraulic cylinders 3 symmetrically arranged at two opposite sides of the fixed frame 1 ; the top shafts 31 of the two hydraulic cylinders 3 are fixedly connected to the two opposite sides of the sliding grille 22 , respectively.

[0036] Figure 7 1 is a schematic diagram of a hydraulic control system provided according to an embodiment of the present invention. Figure 7 As shown, the oil pipes of the two hydraulic cylinders 3 are connected to the hydraulic oil tank 33 and the steering gear hydraulic pump 34 through the electromagnetic reversing valve 32 respectively; wherein the electromagnetic reversing valve 32 is a timed reversing electromagnetic valve, which is used to control the reciprocating motion of the top shaft 31 of the hydraulic cylinder 3.

[0037] Specifically, the embodiment of the present invention utilizes the ship's steering gear hydraulic pump 34 and sets a timed reversing electromagnetic reversing valve 32 in the inlet and outlet pipelines to control the inlet and outlet directions of the pipeline hydraulic oil, thereby controlling the movement stroke and reciprocating cyclic motion of the hydraulic cylinder 3. The embodiment of the present invention applies hydraulic pressure to the ejector device that is directly in contact with the sliding grille 22, thereby pushing the sliding grille 22 to perform reciprocating cutting motion, which is the power source for the entire blockage removal device.

[0038] Specifically, when the water jet propulsion device water inlet grille is blocked, the crew starts the steering gear hydraulic pump 34 to supply hydraulic oil to the two hydraulic cylinders 3 through the hydraulic oil pipe, so that they can perform a top-pressing operation. At this time, the top shaft 31 of the hydraulic cylinder 3 pushes forward to push out the sliding grille 22, and the sliding grille 22 moves relative to the fixed grille 21 under the action of the hydraulic pressure. At the same time, the blade angles of the sliding grille 22 and the blade angles of the fixed grille 21 perform shearing movements toward each other to cut the blockages that are entangled and stuck in the gaps between the grille bars. When the electromagnetic reversing valve 32 is reversed, the sliding grille 22 moves in the opposite direction and returns to the initial position, and then the electromagnetic reversing valve 32 is reversed again, and the sliding grille 22 performs repeated shearing movements.

[0039] From the above description, it can be seen that the embodiment of the present invention provides a device for removing blockage from a grille of a water jet propulsion device for a ship, which has the following technical effects compared with the prior art:

[0040] 1. Cutting is less restricted. The device provided by the present invention uses a hydraulic cylinder for top punching during cutting. The shearing force is large when the blade angle moves relatively. It can efficiently cut most blockages. At the same time, the speed during movement is low. Compared with the transmission motor driven cutting method, it is not limited by the movement speed.

[0041] 2. The transmission device is simple. The device provided by the present invention uses a hydraulic cylinder as a power device. To transmit power, it only needs to provide oil supply pipelines to the hydraulic cylinders on both sides to work normally. Compared with the transmission motor drive device, there is no complicated electrical and mechanical rotation system. On the one hand, it simplifies the structure of the designed device and equipment, making it easy to install and use. On the other hand, it reduces the possibility of failure of the device and improves the reliability and stability of the device.

[0042] 3. Small impact. The transmission device and weight of the device provided by the present invention are relatively light. When not working, it can be regarded as a normally set water inlet grille. There are no extra device parts to block the water inlet, ensuring that the water inlet efficiency is not affected. At the same time, this device is a small external auxiliary mechanism, which can work normally only by being installed on the periphery of the ship's water inlet grille. It does not involve modification operations that change the structural form of the ship itself, ensuring that its original technical performance is not affected.

[0043] 4. The device is light. Since the device provided by the present invention strives to be simple in structure design, the actual device weight is no more than a dozen kilograms at most. Compared with the weight of the entire ship, the weight generated by installing this device has a relatively small impact on the entire hull, avoiding the adverse impact of the device's excessive weight on the ship, which meets actual work needs.

[0044] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0045] 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 device for removing blockage from a grid of a ship water jet propulsion device, characterized in that: include: A fixed frame, a composite grille and a hydraulic cylinder; wherein the fixed frame is arranged below the water inlet of the ship water jet propulsion device, the composite grille comprises a fixed grille and a sliding grille, the bars of the fixed grille and the sliding grille are respectively provided with knife angles, and the knife angles of the fixed grille and the sliding grille are arranged opposite to each other; The fixed grille is fixedly arranged in the fixed frame, and slide grooves are arranged at two sides of the fixed frame, and two sides of the sliding grille are respectively inserted into the slide grooves, and the lower surface of the sliding grille is arranged in contact with the upper surface of the fixed grille; The hydraulic cylinder is arranged at the side of the fixed frame, and the top shaft of the hydraulic cylinder is fixedly connected to the edge of the sliding grille; the sliding grille performs reciprocating cutting motion relative to the fixed grille under the pushing and pulling action of the hydraulic cylinder.

2. The device for removing blockage from the grille of a marine water jet propulsion device according to claim 1, characterized in that: Screw holes are arranged on the top of each frame of the fixing frame, and the fixing frame is fixed to a position below the water inlet of the ship water jet propulsion device through the screw holes and bolts.

3. The device for removing blockage from the grille of a marine water jet propulsion device according to claim 1, characterized in that: The fixed frame is a rectangular frame with a hollow structure inside, and the fixed grid is fixed at the hollow structure position of the fixed frame.

4. The device for removing blockage from the grille of a marine water jet propulsion device according to claim 1, characterized in that: The material of the composite grille includes alloy tool steel.

5. The device for removing blockage from the grille of a marine water jet propulsion device according to claim 1, characterized in that: There are two hydraulic cylinders, which are symmetrically arranged at two opposite sides of the fixed frame; the top shafts of the two hydraulic cylinders are fixedly connected to the two opposite sides of the sliding grille respectively.

6. The device for removing blockage from the grille of a marine water jet propulsion device according to claim 5, characterized in that: The oil pipes of the two hydraulic cylinders are connected to the hydraulic oil tank and the steering gear hydraulic pump respectively through electromagnetic reversing valves; the electromagnetic reversing valve is a timed reversing electromagnetic valve used to control the reciprocating motion of the top shaft of the hydraulic cylinder.

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