A cavitation bubble generating device for cleaning the surface of a ship

Abstract

The present invention discloses a cavitation bubble generating device for cleaning the surface of a hull, and relates to the technical fields of design, manufacture, cleaning and maintenance of ships and marine structures, and solves the problems that the existing hull surface cleaning method needs to rely on external equipment, cannot be cleaned at any time, and has poor cleaning effect. The present invention comprises a hull outer plate, two discharge electrodes, a diversion channel, an electrode array, a discharge chamber and a discharge circuit. The hull outer plate is provided with a diversion channel, and the inside of the hull outer plate is provided with a discharge chamber; the discharge chamber is connected to the outside through the diversion channel; the inner wall of the diversion channel is buried with an electrode array; two discharge electrodes are provided in the discharge chamber, and the discharge electrode and the electrode array are respectively connected to the discharge circuit. The present invention generates microbubbles by continuous discharge in the diversion channel through the electrode array, and the bubbles generated by the instantaneous discharge of the discharge electrode push the water flow and discharge the microbubbles to the outside, and the hull surface is cleaned by cavitation and collapse of the microbubbles.

Description

Technical Field

[0001] The invention relates to the technical field of design, manufacture, cleaning and maintenance of ships and marine structures, and in particular to a cavitation bubble generating device for cleaning the surface of a ship body. Background Art

[0002] During the long-term operation of underwater structures such as ships, a large amount of dirt will accumulate on the surface, which will produce negative effects such as running resistance, resulting in reduced performance, or blocking surface functional devices (such as sensors, etc.), affecting functionality. Traditional methods for cleaning the hull surface include brushing, high-pressure water jet cleaning, etc. These methods have some problems:

[0003] Traditional methods of cleaning the hull surface require the use of equipment and devices with complex mechanical structures and transmission devices such as brushing machines or water pumps outside the hull itself to clean the hull surface; and the local pressure load generated by brushing and water jets during the cleaning process is limited, resulting in poor cleaning results. Summary of the invention

[0004] In order to solve the above-mentioned problems that the existing hull surface cleaning methods need to rely on external equipment, cannot be cleaned at any time, and have poor cleaning effects, the present invention hereby proposes a cavitation bubble generating device for hull surface cleaning. The present invention generates microbubbles by continuous discharge in the diversion channel through an electrode array, and the bubbles generated by the instantaneous discharge of the discharge electrode push the water flow in the discharge chamber and discharge the microbubbles to the outside, and the hull surface is cleaned by cavitation and collapse of the microbubbles.

[0005] The present invention proposes a cavitation bubble generating device for cleaning the surface of a hull, which specifically comprises a hull outer plate, two discharge electrodes, a guide channel, an electrode array, a discharge chamber and a discharge circuit. The guide channel is arranged on the hull outer plate, and a discharge chamber is arranged inside the hull outer plate; the discharge chamber is connected to the outside through the guide channel; an electrode array is buried in the inner wall of the guide channel; two discharge electrodes are arranged in the discharge chamber, and the discharge electrodes and the electrode array are respectively connected to the discharge circuit.

[0006] Furthermore, a right-angle structure is provided at the outlet position of the guide channel and at the connection position between the hull outer plate and the guide channel.

[0007] Furthermore, an electrode array is buried at the outlet of the diversion channel and at the connection position between the hull outer plate and the diversion channel.

[0008] Furthermore, the electrode array includes a plurality of positive electrodes and a plurality of negative electrodes, and the positive electrodes and the negative electrodes are arranged alternately.

[0009] Furthermore, the discharge circuit includes a micro-bubble generating circuit, and the micro-bubble generating circuit includes a second power supply, and the second power supply is respectively connected to a plurality of positive electrodes and a plurality of negative electrodes.

[0010] Furthermore, the discharge circuit also includes a discharge control circuit, which includes a capacitor, a power supply 1, a switch 1, a switch 2 and a single-chip microcomputer controller, wherein one end of the power supply 1 is connected to one end of the capacitor, and the other end is connected to the other end of the capacitor through the switch 1; one end of the capacitor is connected to one of the discharge electrodes, and the other end of the capacitor is connected to the other of the discharge electrodes through the switch 2; and the single-chip microcomputer controller is respectively connected to the switch 1 and the switch 2.

[0011] Furthermore, an insulating material is buried in the inner wall of the guide channel to form an insulating layer.

[0012] The beneficial effects of the cavitation bubble generating device for cleaning the surface of a ship body described in the present invention are:

[0013] (1) The cavitation bubble generating device for cleaning the surface of a ship hull of the present invention overcomes the problems of existing methods for cleaning the surface of a ship hull, which require the use of external equipment, cannot be cleaned at any time, and have poor cleaning effects. By directly installing the cleaning device at a key position on the hull or underwater structure that needs to be kept clean, it is ensured that the cleaning work can be carried out anytime and anywhere, and the overall structure of the device is simple and occupies little space.

[0014] (2) The cavitation bubble generating device for cleaning the surface of a ship body described in the present invention has microbubbles generated by the electrode array, which flow out with the water flow under the impetus of bubbles generated by the discharge electrode, and the surface of the ship body is cleaned by the expansion and collapse of the microbubbles. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0016] In the attached picture:

[0017] Figure 1 It is a structural schematic diagram of a cavitation bubble generating device for cleaning the surface of a ship body according to the present invention;

[0018] Figure 2 It is a schematic diagram of the arrangement of an electrode array of a cavitation bubble generating device for cleaning a hull surface according to the present invention;

[0019] Among them: 1-hull outer plate, 2-discharge electrode, 3-conducting channel, 4-electrode array, 5-right-angle structure, 6-discharge chamber, 7-capacitor, 8-power supply one, 9-power supply two, 10-switch one, 11-switch two, 12-single-chip microcomputer controller, 13-positive electrode, 14-negative electrode, 15-insulating material, 16-low-voltage area, 17-clean area. DETAILED DESCRIPTION

[0020] The specific implementation of the present invention is further described in detail below with reference to the accompanying drawings:

[0021] Specific implementation method 1: See Figure 1-Figure 2 The present embodiment is described in detail. The cavitation bubble generating device for cleaning the hull surface described in the present embodiment specifically comprises a hull outer plate 1, two discharge electrodes 2, a guide channel 3, an electrode array 4, a discharge chamber 6 and a discharge circuit. The hull outer plate 1 is provided with a guide channel 3, and a discharge chamber 6 is provided inside the hull outer plate 1; the discharge chamber 6 is connected to the outside through the guide channel 3; the electrode array 4 is buried in the inner wall of the guide channel 3, the electrode array 4 is buried at the outlet of the guide channel 3, and the electrode array 4 is buried inside the connection position between the hull outer plate 1 and the guide channel 3; two discharge electrodes 2 are arranged in the discharge chamber 6, and the discharge electrode 2 and the electrode array 4 are respectively connected to the discharge circuit, and the discharge circuit is arranged on the inner side of the hull outer plate 1; when working, the electrode array 4 continuously discharges to generate microbubbles, and the discharge electrode 2 is used to discharge instantly to generate expanded bubbles, which push the water flow inside the discharge chamber 6 and the guide channel 3 and drive the microbubbles to move at high speed and discharge outward.

[0022] A right-angle structure 5 is provided at the outlet of the guide channel 3, and a right-angle structure 5 is provided at the connection position between the hull outer plate 1 and the guide channel 3; the right-angle structure 5 is provided so that a shear flow is formed when the fluid flows, and according to the principle of fluid mechanics, this will cause the local pressure in the water near it to decrease, forming a low-pressure area 16; the shear force causes the microbubbles in the fluid to be subjected to tension, and when the microbubbles enter the low-pressure area 16, they further expand; driven by the water flow, all the expanded microbubbles flow toward the cleaning area 17 along the incoming flow direction; here, the flow field pressure returns to normal, and the expanded microbubbles begin to collapse under the action of external force, generating a series of pressure loads unique to cavitation bubbles such as collapse jets and collapse pressure waves, which can remove stains on the surface of the hull structure and produce a cleaning effect on the surface of the cleaning area 17.

[0023] The electrode array 4 includes a plurality of positive electrodes 13 and a plurality of negative electrodes 14 . The positive electrodes 13 and the negative electrodes 14 are arranged alternately. Microbubbles are generated under the action of the positive electrodes 13 and the negative electrodes 14 .

[0024] The discharge circuit also includes a microbubble generating circuit, which includes a positive circuit, a negative circuit and a power supply 2 9 , wherein the positive electrode of the power supply 2 9 is connected to a plurality of positive electrodes 13 through the positive circuit, and the negative electrode of the power supply 2 9 is connected to a plurality of negative electrodes 14 through the negative circuit.

[0025] The discharge circuit includes a discharge control circuit, which includes a capacitor 7, a power supply 18, a switch 10, a switch 211 and a single-chip microcomputer controller 12. One end of the power supply 18 is connected to one end of the capacitor 7, and the other end is connected to the other end of the capacitor 7 through the switch 10, and the on-off of the charging circuit is controlled by the switch 10; one end of the capacitor 7 is connected to one of the discharge electrodes 2, and the other end of the capacitor 7 is connected to the other of the discharge electrodes 2 through the switch 211, and the on-off of the discharge circuit is controlled by the switch 211; the single-chip microcomputer controller 12 is respectively connected to the switch 10 and the switch 211, and controls the on-off of the switch 10 and the switch 211. The capacitor 7 is charged by the power supply 18; after charging is completed, the electric energy of the capacitor 7 is released through the discharge electrode 2, and an electric spark is generated at the tip of the discharge electrode 2.

[0026] The inner wall of the diversion channel 3 is embedded with insulating material 15 to form an insulating layer to separate the electrode array 4 from the internal structure of the hull.

[0027] The specific working principle of the cavitation bubble generating device for cleaning the hull surface described in the present invention is:

[0028] First, the switch is operated by the single-chip controller 12 to turn on the switch 10, and the power supply 1 8 charges the capacitor 7; then the switch 10 is turned off and the switch 2 11 is turned on, and the electric energy of the capacitor 7 is released through the discharge electrode 2, generating an electric spark at the tip of the discharge electrode 2, causing the water in the discharge cavity 6 to vaporize rapidly, generating expanding bubbles, and pushing the water flow containing microbubbles to flow out quickly through the diversion channel 3, forming a shear flow at the right-angle structure 5; at the same time, the outflow from the hull from top to bottom also generates a shear flow at the right-angle structure 5; according to the principle of fluid mechanics, this will cause the local pressure in the water nearby to decrease, forming several low-pressure areas 16. The shear force causes the microbubbles in the fluid to be subjected to tension, thereby expanding; then the microbubbles enter the low-pressure area 16 and further expand in the low-pressure area 16. All the expanded microbubbles flow to the clean area 17 along the incoming flow direction. In the cleaning area 17 , the flow field pressure returns to normal, and the expanded microbubbles begin to collapse under the action of external force, generating a series of pressure loads unique to cavitation bubbles, such as collapse jets and collapse pressure waves, which can remove stains on the surface of the hull structure and have a cleaning effect on the surface of the cleaning area 17 .

[0029] To summarize the above implementation cases, the cavitation bubble generating device for cleaning the surface of a hull described in the present invention overcomes the problems of existing hull surface cleaning methods that require the use of external equipment, cannot be cleaned at any time, and have poor cleaning effects. By directly installing the cleaning device at a key position on the hull or underwater structure that needs to be kept clean, it is ensured that cleaning work can be carried out anytime and anywhere, and the overall structure of the device is simple and occupies a small space. The cavitation bubble generating device for cleaning the surface of a hull described in the present invention, the microbubbles generated by the electrode array 4 are driven by the bubbles generated by the discharge electrode 2, and flow out with the water, and the hull surface is cleaned by the expansion and collapse of the microbubbles.

[0030] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the invention. It can also be a reasonable combination of the features recorded in the above implementation methods. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cavitation bubble generating device for cleaning the surface of a ship, characterized in that: The invention comprises a hull outer plate (1), two discharge electrodes (2), a flow guide channel (3), an electrode array (4), a discharge chamber (6) and a discharge circuit, wherein the hull outer plate (1) is provided with a flow guide channel (3), and the discharge chamber (6) is provided inside the hull outer plate (1); the discharge chamber (6) is connected to the outside through the flow guide channel (3); an electrode array (4) is buried in the inner wall of the flow guide channel (3); two discharge electrodes (2) are provided in the discharge chamber (6), and the discharge electrodes (2) and the electrode array (4) are respectively connected to the discharge circuit, and microbubbles generated by the provided electrode array (4) flow out along with the water flow under the driving action of bubbles generated by the discharge electrode (2), and the surface of the hull is cleaned by the expansion and collapse of the microbubbles; A right-angle structure (5) is provided at the outlet of the guide channel (3) and at the connection position between the hull outer plate (1) and the guide channel (3). The right-angle structure (5) forms a shear flow when the fluid flows, causing the local pressure in the water nearby to decrease, thereby forming a low-pressure area (16).

2. The cavitation bubble generating device for cleaning the surface of a ship body according to claim 1, characterized in that: An electrode array (4) is buried at the outlet of the diversion channel (3) and at the connection position between the hull outer plate (1) and the diversion channel (3).

3. The cavitation bubble generating device for cleaning the surface of a ship body according to claim 1 or 2, characterized in that: The electrode array (4) comprises a plurality of positive electrodes (13) and a plurality of negative electrodes (14), wherein the positive electrodes (13) and the negative electrodes (14) are arranged alternately.

4. The cavitation bubble generating device for cleaning the surface of a ship body according to claim 3, characterized in that: The discharge circuit comprises a micro-bubble generating circuit, and the micro-bubble generating circuit comprises a second power supply (9), and the second power supply (9) is respectively connected to a plurality of positive electrodes (13) and a plurality of negative electrodes (14).

5. The cavitation bubble generating device for cleaning the surface of a ship body according to claim 1, characterized in that: The discharge circuit further comprises a discharge control circuit, the discharge control circuit comprising a capacitor (7), a power source 1 (8), a switch 1 (10), a switch 2 (11) and a single-chip microcomputer controller (12); one end of the power source 1 (8) is connected to one end of the capacitor (7), and the other end is connected to the other end of the capacitor (7) through the switch 1 (10); one end of the capacitor (7) is connected to one of the discharge electrodes (2), and the other end of the capacitor (7) is connected to the other of the discharge electrodes (2) through the switch 2 (11); and the single-chip microcomputer controller (12) is respectively connected to the switch 1 (10) and the switch 2 (11).

6. The cavitation bubble generating device for cleaning the surface of a ship body according to claim 1, characterized in that: An insulating material (15) is buried in the inner wall of the guide channel (3) to form an insulating layer.

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