Hydraulically propelled watercraft

Abstract

To provide a hydraulic propulsion ship capable of generating a propulsion force by sucking seawater from a seachest of the ship and jetting the seawater to a stern of the ship.SOLUTION: The ship includes a seawater suction unit 110 mounted on a lower seachest portion 101 of the ship and configured to suck seawater and deliver the seawater to an engine room, the engine room 120 mounted inside the ship and configured to apply a predetermined pressure to the seawater delivered from the seawater suction unit 110 and deliver the seawater to an injection nozzle unit 130, and the injection nozzle unit 130 mounted on a tail of the ship and configured to inject the seawater delivered from the engine room 120 rearward. According to the present invention, the high-pressure water injected from the injection nozzle unit 130 is injected and transmitted to gradually increase the propulsive force of the ship, and accordingly, the speed of the ship is gradually accelerated to shorten the transportation period.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a water-propulsion vessel, and more particularly to a water-propulsion vessel capable of generating propulsive force by drawing in seawater from a sea chest of the vessel and injecting it from the stern of the vessel. [Background technology]

[0002] Generally, most ships are propelled by a screw, but recently, the need for faster ships has emerged, and water jet propulsion systems that use water jets instead of screws are being used.

[0003] A waterjet propulsor is a device in which propulsion is achieved by a waterjet generated by a pump driven by an electric motor or directly by a diesel engine or gas turbine.

[0004] Compared to existing propeller propulsion systems, water jet propulsors do not have shafts or large propellers attached to the hull, and are therefore a system with extremely low hull resistance and high efficiency at high speeds, and are therefore increasingly being used in naval vessels and special-purpose ships.

[0005] In such a water jet propulsion system, water flows in through an inlet, an impeller is installed inside the inlet pipe, the impeller is installed to rotate at high speed on an impeller rotating shaft that receives rotational power from an engine and rotates at high speed, and a nozzle is installed behind the impeller to spray water backward at high speed. That is, when water flows into the inlet pipe through the inlet, the impeller shaft rotated by the engine rotates the impeller at high speed, spraying the water backward at high speed through the nozzle, and generating propulsion force from the sprayed water.

[0006] Waterjets were developed with the goal of enabling high-speed navigation of ships, and are used in small warships and leisure boats due to their low noise and excellent turning ability.However, compared to propeller-driven vessels, waterjet propulsion systems have the disadvantages of being more complicated in design, slightly higher in manufacturing cost and fuel consumption, and requiring more complex technology for navigation (see Figure 1).

[0007] Therefore, there is a need for a technology that can solve the above-mentioned problems of the conventional technology. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Korean Patent Registration No. 10-2416631 Summary of the Invention [Problem to be solved by the invention]

[0009] SUMMARY OF THE INVENTION An object of the present invention is to provide a water-propulsion vessel capable of generating propulsive force by drawing in seawater from a sea chest of the vessel and injecting it from the stern of the vessel. [Means for solving the problem]

[0010] To achieve this object, a water-propulsion vessel according to one aspect of the present invention may include a seawater intake section attached to a lower sea chest portion of the vessel and configured to draw in seawater and deliver it to an engine room, an engine room attached inside the vessel and configured to apply a preset pressure to the seawater delivered from the seawater intake section and deliver it to an injection nozzle section, and an injection nozzle section attached to the stern of the vessel and configured to spray the seawater delivered from the engine room rearward.

[0011] In one embodiment of the present invention, the seawater suction section may include an suction space forming section that is recessed to a predetermined depth into a lower sea chest section of the vessel and that forms a space into which seawater from around the lower part of the vessel can enter; an opening / closing section that is attached to a lower surface of the suction space forming section and that opens and closes the inside of the suction space forming section by operating to open and close in response to a control signal from a control section; a seawater transmission pipe that connects the suction space forming section to an engine room and that transmits seawater that has entered the inside of the suction space forming section to the engine room; and a water filter section that is attached to the seawater transmission pipe and that filters seawater flowing through the seawater transmission pipe.

[0012] In one embodiment of the present invention, the engine room may include a plurality of pump units installed at regular intervals inside the engine room and configured to apply a preset pressure to seawater transferred from a seawater transfer pipe and inject the seawater into a spray pipe, and a spray pipe installed on a rear side of the engine room and configured to transfer the seawater transferred by the pump units to a spray nozzle.

[0013] In one embodiment of the present invention, the injection nozzle section may include a nozzle fixing section that is attached to the rear of the vessel and has a structure in which a number of injection nozzle units are fixed at regular intervals, and injection nozzle units that are fixed at regular intervals to the nozzle fixing section and have a structure in which seawater transmitted from an injection pipe is injected rearward.

[0014] In an embodiment of the present invention, the nozzle fixing part may have a structure in which a plurality of nozzle unit mounting fixtures are arranged at regular intervals, and the mounting fixtures can change the fixing position of the injection nozzle unit.

[0015] In an embodiment of the present invention, the nozzle fixing part may include a microbubble supply part attached to the nozzle fixing part, receiving air and seawater from the outside and supplying seawater in which microbubbles are suspended to the injection nozzle unit.

[0016] In this case, the microbubble supply unit is a piping structure that is attached in communication with the injection nozzle unit and allows seawater supplied from the outside to flow, and includes a piping main body having a number of concave-convex structures continuously formed on its inner surface, a central axis forming unit that is attached in the center of the inside of the piping main body and is made of a flexible material having a predetermined rigidity, and that transmits air injected from a first gas injection unit and a second gas injection unit to the inside of the piping main body in the form of microbubbles through a number of discharge holes formed on its outer peripheral surface, and a central axis forming unit that is attached in the inside of the piping main body in a form that surrounds the central axis forming unit along the extension direction of the piping main body, and The configuration may include a spiral spring that forms a spiral structure along the circumferential surface and creates a vortex in seawater flowing through the inside of the piping main body, a first fixing part that is attached to the inside of the piping main body and is structured to fix one end of the central axis forming part, a second fixing part that is attached to the inside of the piping main body and is structured to fix the other end of the central axis forming part, a first gas injection part that is attached to the first fixing part and is structured to inject air taken in from the outside into the inside of the central axis forming part in the form of microbubbles, and a second gas injection part that is attached to the second fixing part and is structured to inject air taken in from the outside into the inside of the central axis forming part in the form of microbubbles. [Effects of the Invention]

[0017] As described above, the water-propulsion vessel of the present invention is provided with a seawater intake section, an engine room, and an injection nozzle section of a specific structure, so that seawater in the sea chest can be transported from the engine room through the seawater intake section using a high-pressure pump and injected through the injection nozzle section at the rear of the stern to generate propulsion. The high-pressure water injected from the injection nozzle section is transmitted in a jet, gradually increasing the propulsion force of the vessel, thereby gradually accelerating the vessel's speed and shortening the transportation period.

[0018] Furthermore, the hydropropulsion vessel of the present invention will proactively respond to the demands of shipping companies seeking to create green sea routes, which is welcome news for the shipping industry. While the International Maritime Organization (IMO) has set carbon dioxide reduction targets of 70% by 2030 and 100% by 2050, which require significant expenditures for the use of energy-efficient machinery and green energy in existing ships and new construction, the significant cost savings achieved by the present invention could serve as an opportunity to meet regulatory requirements in the face of climate change. Furthermore, increased ship speeds will reduce shipping costs, and increased logistics volumes will significantly improve corporate profits. Consequently, the practical application of this invention will revolutionize the shipping industry. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a partially enlarged view showing a water jet vessel according to the prior art and a photograph showing a specific structure. [Figure 2] 1 is a schematic longitudinal cross-sectional view showing a water-propulsion vessel according to an embodiment of the present invention. [Figure 3] 3 is a bottom view showing the water-propulsion vessel shown in FIG. 2. [Figure 4] 3 is a side view showing the rear of the water-propulsion vessel shown in FIG. 2. [Figure 5] FIG. 10 is a schematic longitudinal cross-sectional view showing a water-propulsion vessel according to still another embodiment of the present invention. [Figure 6] 6 is a longitudinal cross-sectional view showing a microbubble supply unit of the water-propulsion vessel shown in FIG. 5. [Figure 7] FIG. 7 is an enlarged view of part C in FIG. 6. DETAILED DESCRIPTION OF THE INVENTION

[0020] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms and phrases used in the present specification and claims should not be construed as being limited to their ordinary or dictionary meanings, but should be construed as being consistent with the technical ideas of the present invention.

[0021] Throughout this specification, when an element is said to be "on" another element, this includes not only when the element is in contact with the other element, but also when there is another element between the two elements. Throughout this specification, when a part is said to "comprise" a certain element, this does not mean that it excludes other elements, but that it may further include other elements, unless otherwise specified.

[0022] FIG. 2 shows a schematic longitudinal cross-sectional view of a water-propulsion vessel according to one embodiment of the present invention, FIG. 3 shows a bottom view of the water-propulsion vessel shown in FIG. 2, and FIG. 4 shows a side view of the rear of the water-propulsion vessel shown in FIG. 2.

[0023] Referring to these drawings, the water-propulsion vessel 100 according to this embodiment is equipped with a seawater intake section 110, an engine room 120, and an injection nozzle section 130 having a specific structure, and thus seawater in the sea chest can be transported from the engine room 120 through the seawater intake section 110 using a high-pressure pump, and then sprayed through the injection nozzle section 130 at the rear of the stern to generate propulsive force. The high-pressure water sprayed from the injection nozzle section 130 is sprayed and transmitted, gradually increasing the propulsive force of the vessel, thereby accelerating the vessel's speed and shortening the transportation period.

[0024] Hereinafter, each component of the water-propulsion vessel 100 according to this embodiment will be described in detail with reference to the drawings.

[0025] The seawater intake unit 110 according to this embodiment is installed in the lower sea chest of the ship, and has a structure for drawing in seawater and delivering it to the engine room 120.

[0026] The engine room 120 according to this embodiment is configured to be installed inside the ship, and is configured to apply a preset pressure to seawater delivered from the seawater intake part 110 and deliver it to the injection nozzle part 130.

[0027] The jet nozzle unit 130 according to this embodiment is mounted at the rear of the vessel and has a structure for jetting seawater delivered from the engine room 120 rearward.

[0028] Specifically, the seawater suction unit 110 according to this embodiment may include a suction space forming unit 111 having a specific structure, an opening / closing unit 112, a seawater transmission pipe 113, and a water filter unit 114. The suction space forming unit 111 of the seawater suction unit 110 is recessed to a predetermined depth in the lower sea chest portion of the vessel to form a space into which seawater from the lower part of the vessel can enter. The opening / closing unit 112 is attached to the lower surface of the suction space forming unit 111 and opens and closes in response to a control signal from the control unit to open or close the interior of the suction space forming unit 111. The seawater transmission pipe 113 connects the suction space forming unit 111 and the engine room 120 in a communicating structure, and transmits seawater that has entered the suction space forming unit 111 to the engine room 120. The water filter unit 114 is attached to the seawater transmission pipe 113 and filters seawater flowing through the seawater transmission pipe 113.

[0029] The engine room 120 according to this embodiment may include a pump unit 121 and an injection pipe 122 having a specific structure.

[0030] Specifically, a plurality of pump units 121 of the engine room 120 are installed at regular intervals inside the engine room 120, and are structured to apply a preset pressure to seawater transmitted from the seawater transmission pipe 113 and inject the seawater into the injection pipe 122. The injection pipe 122 is installed on the rear side of the engine room 120 and is structured to transmit the seawater transmitted by the pump units 121 to the injection nozzle part 130.

[0031] The injection nozzle part 130 according to this embodiment may include a nozzle fixing part 131 and an injection nozzle unit 132 having a specific structure.

[0032] Specifically, the nozzle fixing part 131 of the jet nozzle part 130 is configured to be attached to the rear of the vessel, and has a structure in which a number of jet nozzle units 132 are fixed at regular intervals. The jet nozzle units 132 are fixed at regular intervals to the nozzle fixing part 131, and are configured to spray seawater transmitted from the jet piping 122 rearward.

[0033] In some cases, as shown in FIG. 4, a plurality of nozzle unit mounting holes 133 may be arranged at regular intervals on the nozzle fixing part 131, so that the fixing position of the injection nozzle unit 132 can be changed and mounted.

[0034] In this case, the operator can change the fixed position of the jet nozzle unit 132 to another position in consideration of the state and operating conditions of the ship, thereby optimizing it to the operating conditions of the ship.

[0035] FIG. 5 shows a schematic longitudinal cross-sectional view of a water-propulsion vessel according to another embodiment of the present invention, FIG. 6 shows a longitudinal cross-sectional view of a microbubble supply section of the water-propulsion vessel shown in FIG. 5, and FIG. 7 shows an enlarged view of part C of FIG. 6.

[0036] Referring to these drawings, the water-propulsion vessel 100 according to this embodiment may further include a microbubble supplier 140 having a specific structure.

[0037] The microbubble supply unit 140 according to this embodiment is attached to the nozzle fixing unit 131, and is structured to receive air and seawater from the outside and to supply the seawater in which microbubbles are suspended to the jet nozzle unit 132.

[0038] Specifically, the microbubble supply unit 140 according to this embodiment may include a piping main body 141 having a specific structure, a central axis forming unit 142, a spiral spring 143, a first fixing unit 144, a second fixing unit 145, a first gas injection unit 146, and a second gas injection unit 147. The piping main body 141 is configured to be attached in communication with the injection nozzle unit 132, has a piping structure through which seawater supplied from the outside can flow, and has a number of continuous uneven structures formed on its inner surface. The central axis forming unit 142 is configured to be attached in the center of the piping main body 141, is made of a flexible material with a predetermined amount of rigidity, and is configured to deliver air injected from the first gas injection unit 146 and the second gas injection unit 147 to the inside of the piping main body 141 in the form of microbubbles through a number of discharge holes formed on its outer circumferential surface. The spiral spring 143 is continuously mounted inside the piping main body 141 along the extension direction of the piping main body 141 in a form that wraps around the central axis forming portion 142, forming a spiral structure along the outer peripheral surface of the central axis forming portion 142 and forming a vortex in the seawater flowing through the inside of the piping main body 141. The first fixing portion 144 is mounted inside the piping main body 141 and is structured to fix one end of the central axis forming portion 142. The second fixing portion 145 is mounted inside the piping main body 141 and is structured to fix the other end of the central axis forming portion 142. The first gas injection portion 146 is mounted to the first fixing portion 144 and is structured to inject air drawn in from the outside into the inside of the central axis forming portion 142 in the form of microbubbles. The second gas injector 147 is attached to the second fixing part 145 and has a structure for injecting air drawn from the outside into the central axis forming part 142 in the form of microbubbles.

[0039] The cleaning bubble supplier 140 according to this embodiment injects microbubbles into the injection nozzle unit 132, and the microbubbles are attracted to the surfaces of the injection nozzle unit 132, the aft vessel, and the rudder and then burst, creating a cavitation effect. At this time, foreign matter that has been attracted to the surfaces of the injection nozzle unit 132, the aft vessel, and the rudder is released, and the surfaces of the injection nozzle unit 132, the aft vessel, and the rudder can be maintained clean. This eliminates the need to hire a separate diver for maintenance, thereby reducing maintenance costs.

[0040] As described above, the water-propulsion vessel of the present invention is provided with a seawater intake section 110, an engine room 120, and an injection nozzle section 130 having a specific structure, and thereby seawater in the sea chest can be transported from the engine room 120 through the seawater intake section 110 using a high-pressure pump and sprayed through the injection nozzle section 130 at the rear of the stern to generate propulsive force. The high-pressure water sprayed from the injection nozzle section 130 is sprayed and transmitted, gradually increasing the propulsive force of the vessel, thereby gradually accelerating the vessel's speed and shortening the transportation period.

[0041] Although the foregoing detailed description of the present invention has described only specific embodiments thereof, it should be understood that the present invention is not limited to the specific forms set forth in the detailed description, but rather includes all modifications, equivalents, and alternatives falling within the spirit and scope of the present invention as defined by the appended claims.

[0042] In other words, the present invention is not limited to the specific embodiments and explanations described above, and various modifications can be made by anyone with ordinary knowledge in the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims, and such modifications are within the scope of protection of the present invention. [Explanation of symbols]

[0043] 100 Hydraulic propulsion vessels 101 Sea Chest 110 Seawater intake 111 Suction space forming part 112 Opening and closing section 113 Seawater transmission piping 114 Water filter section 115 Butterfly valve 120 Engine Room 121 Pump unit 122 Injection piping 130 Injection nozzle part 131 Nozzle fixing part 132 Injection nozzle unit 133 Nozzle unit mounting port 140 Microbubble supply unit 141 Piping body 142 Central axis forming part 143 Spiral Spring 144 First fixed part 145 Second fixed part 146 First gas injection section 147 Second gas injection section

Claims

[Claim 1] a seawater intake unit (110) that is attached to the lower sea chest of the ship and that draws in seawater and delivers it to the engine room (120); an engine room (120) installed inside the vessel and configured to apply a predetermined pressure to seawater delivered from a seawater intake unit (110) and deliver the pressure to an injection nozzle unit (130); and an injection nozzle unit (130) attached to the rear of the vessel and configured to inject seawater transferred from the engine room (120) rearward; Including, The seawater intake section (110) an intake space forming part (111) formed in a predetermined depth in the lower sea chest part of the ship to form a space through which seawater around the lower part of the ship can enter; an opening / closing unit (112) attached to the lower surface of the suction space forming unit (111) and configured to open or close the inside of the suction space forming unit (111) by opening or closing it in response to a control signal from a control unit; a seawater transmission pipe (113) that connects the suction space forming portion (111) and the engine room (120) in a structure that communicates with each other and that transmits seawater that has entered the suction space forming portion (111) to the engine room (120); and a water filter unit (114) attached to the seawater transmission pipe (113) and configured to filter seawater flowing through the seawater transmission pipe (113); Including, The engine room (120) a plurality of pump units (121) installed at regular intervals inside the engine room (120) and configured to apply a preset pressure to seawater transmitted from the seawater transmission pipe (113) and inject it into the injection pipe (122); and an injection pipe (122) attached to the rear side of the engine room (120) and configured to transfer seawater transferred by the pump unit (121) to an injection nozzle part (130); Including, The injection nozzle portion (130) A nozzle fixing unit (131) attached to the rear of the vessel and configured to fix a number of jet nozzle units (132) at regular intervals; and a plurality of jet nozzle units (132) fixed at regular intervals to the nozzle fixing portion (131) and configured to jet seawater conveyed from the jet pipe (122) backward; Including, The nozzle fixing portion (131) is The water-propulsion vessel has a structure in which a plurality of nozzle unit mounting holes are arranged at regular intervals, allowing the fixing position of the jet nozzle unit (132) to be changed and mounted.

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