A marine high-power ultrasonic pipeline anti-fouling device and its control method

Abstract

The present invention relates to the technical field of comprehensive anti-corrosion and anti-fouling for ships, and specifically to a high-power ultrasonic pipeline anti-fouling device for ships and a control method thereof. The present invention installs a contact ultrasonic transducer on the outer wall of a seawater pipeline, in conjunction with a high-power drive controller, to utilize high-power ultrasonic waves to drive away and prevent fouling marine organisms, and can also, to a certain extent, remove attached marine organisms. The transducer of the present invention is arranged on the outer wall of a ship's seawater pipeline or valve box using a contact installation method and is connected via a contoured base stud, making the overall device easy to disassemble, arrange, and maintain without affecting the flow of seawater in the pipeline. The ultrasonic pipeline anti-fouling device of the present invention adopts a rotary control logic and realizes automatic adjustment and alternating intermittent operation by adding a switching circuit. While ensuring the anti-fouling effect of the ship's seawater pipeline, it can effectively control power consumption and heat generation, improve device reliability, and reduce device size, and has broad application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of comprehensive anti-corrosion and anti-fouling for ships, and in particular to a ship-used high-power ultrasonic pipeline anti-fouling device and a control method thereof. Background Art

[0002] Seawater piping systems are found throughout a vessel and are a vital component of its propulsion, power, and auxiliary systems. Once marine organisms foul a vessel's seawater piping, not only does this increase the roughness of the pipe's inner wall, reducing the effective diameter and increasing flow resistance, but it can also accelerate localized corrosion at the site of biofouling, leading to pipe wall perforation. For cooling system seawater piping, marine organism fouling can reduce heat exchange efficiency. Severe condenser pipe blockage can cause unplanned downtime, suspension of service, and even safety incidents, necessitating appropriate anti-fouling measures.

[0003] Ultrasonic anti-fouling technology is an effective anti-fouling method. It uses ultrasonic vibration components to generate ultrasonic waves of a certain frequency and intensity in the water, and uses a variety of combined effects such as cavitation effect and mechanical vibration to achieve the effect of repelling, removing and preventing marine organisms.

[0004] Existing marine ultrasonic anti-fouling devices use an insert-type structure and are directly placed in the seabed gates and filters to kill and drive away marine fouling organisms at the seabed gates and filters. One method is to use ultrasonic vibration plates, each of which is equipped with 48 50W transducers. The unit area power of this device, that is, the sound intensity, is still at a relatively low level, and the anti-fouling effect is limited. In addition, the reliability of the vibration plate structure is poor, and continuous ultrasonic vibration may cause the vibration plate welds to crack and fail. At the same time, due to the limitation of the installation position, its replacement and maintenance are relatively difficult. One method is to use ultrasonic vibrating rods, each vibrating rod is matched with a transducer. This structure can improve the anti-fouling effect and reliability, but this insert-type design is limited in its placement position due to the long length of the vibrating rod. There is also an ultrasonic anti-marine growth system that uses a contact structure, with multiple transducers distributed in locations such as filters and seawater valves. Studies have shown that although low-power ultrasonic waves can prevent the attachment of marine organisms to a certain extent, only when higher-power ultrasonic waves act continuously can they guarantee their killing effect on marine organism larvae and spores. Its high-power continuous action will lead to high power consumption and high heat generation. The transducer needs to be equipped with a separate cooling device, which increases the size of the device, which is not conducive to contact installation.

[0005] In order to solve the problems of insufficient protection effect of existing low-power ultrasonic anti-fouling technology, limited layout and installation of high-power ultrasonic transducers, high power consumption and heat generation, etc., the present invention proposes a marine high-power ultrasonic pipeline anti-fouling device and its control method. Summary of the Invention

[0006] The technical problem to be solved by the present invention is: in view of the shortcomings of the existing technology, a high-power ultrasonic pipeline anti-fouling device for ships and a control method thereof are provided, which can effectively control power consumption and heat generation while ensuring the anti-fouling effect of ship seawater pipelines, improve device reliability, and reduce device size.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] 1. A marine high-power ultrasonic pipeline anti-fouling device

[0009] The present invention provides a marine high-power ultrasonic pipeline anti-fouling device, which mainly includes: a drive controller and multiple ultrasonic transducers. The ultrasonic transducers are evenly arranged on the outer wall of the ship's seawater pipeline in a contact installation manner. The drive controller is equipped with a three-phase rectifier module, a power amplifier drive module, and a human-machine interface module, and the power amplifier drive module is equipped with a switching control circuit. The multiple ultrasonic transducers are respectively connected to corresponding output terminals on the power amplifier drive module through corresponding control cables.

[0010] Furthermore, the ultrasonic transducer specifically adopts a piezoelectric ceramic transducer, and the maximum pulse power of a single ultrasonic transducer is not less than 2kW, and the effective range is not less than 3 meters; the ultrasonic transducers are all contact-mounted on the outer wall of the ship's seawater pipeline through a contoured base.

[0011] Furthermore, the shape and size of the contoured base are adapted to the outer contour of the seawater pipeline at the installation location, and the material of the contoured base is the same as that of the seawater pipeline.

[0012] Furthermore, the ultrasonic transducer is mounted on a corresponding contoured base via connecting bolts, and the contoured base is fixedly connected to a preset position on the outer wall of the seawater pipeline by welding.

[0013] Furthermore, the three-phase rectifier module is provided with a filter circuit, a power factor correction circuit and a phase-shifted full-bridge circuit, the input end of which is connected to the ship power supply, and the output end is connected to the power amplifier drive module, for converting the input ship power supply into a DC power supply and outputting it to the power amplifier drive module.

[0014] Furthermore, the power amplifier drive module is provided with a control circuit, a drive circuit and a power amplifier circuit. The control circuit is electrically connected to the human-machine interface module and the ship control system through a communication cable; the drive circuit synthesizes an electrical signal with specified waveform and frequency parameters according to the control signal output by the control circuit, and the power amplifier circuit uses a MOS tube and a transformer to amplify the power of the electrical signal and output it to the corresponding ultrasonic transducer.

[0015] Furthermore, a switching control circuit is provided in the power amplifier driving module, and the switching control circuit controls the on and off of each ultrasonic transducer control circuit through multiple relays. The switching control circuit performs interval operation control of each ultrasonic transducer according to a preset switching control algorithm.

[0016] Furthermore, the plurality of ultrasonic transducers are uniformly arranged along the outer wall of the ship's seawater pipeline in an up-down-up-down alternating pattern.

[0017] 2. A control method for a marine high-power ultrasonic pipeline anti-fouling device

[0018] Based on the same inventive concept, the present invention also provides a control method for the above-mentioned marine high-power ultrasonic pipeline anti-fouling device, which specifically includes the following steps:

[0019] S1, grouping multiple ultrasonic transducers evenly distributed on the seawater pipeline, specifically, sequentially grouping four ultrasonic transducers adjacently arranged in an up-down-up-down order;

[0020] S2, starting each group of ultrasonic transducers in sequence according to a preset time interval, specifically starting a group of ultrasonic transducers every time a preset interval time T0 passes, and each group of ultrasonic transducers is turned off after working for a preset time T1;

[0021] S3, performing cyclic switching control on the four ultrasonic transducers in each group in turn, specifically, each ultrasonic transducer in the same group stops working for a preset time T2 and then starts the next adjacent ultrasonic transducer, and T2×4=T1.

[0022] Among them, the preset interval time T0 is adjusted in real time according to the flow rate of the ship's seawater pipeline, specifically: T0 = C×V; wherein C is a preset correction coefficient, and V is the flow rate of the ship's seawater pipeline, that is, the greater the seawater pipeline flow rate V, the longer the preset interval time T0, and the smaller the seawater pipeline flow rate V, the shorter the preset interval time T0.

[0023] Compared with the prior art, the present invention has the following main advantages:

[0024] 1. The present invention installs a contact ultrasonic transducer on the outer wall of the seawater pipeline, and cooperates with a high-power drive controller to use high-power ultrasonic waves to drive away and prevent fouling marine organisms. It can also remove attached marine organisms to a certain extent, thereby improving the anti-fouling effect of the device.

[0025] 2. The transducer of the present invention is arranged on the outer wall of the ship's seawater pipeline or valve box using a contact installation method and is installed by connecting the contoured base studs, making the overall disassembly, arrangement and maintenance of the device convenient without affecting the flow of seawater in the pipeline;

[0026] 3. The ultrasonic pipeline anti-fouling device of the present invention adopts a rotary control logic and realizes automatic adjustment of alternating intermittent operation by adding a switching circuit. It can effectively control power consumption and heat generation while ensuring the anti-fouling effect of the ship's seawater pipeline, improve the reliability of the device, and reduce the size of the device. It has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a system principle diagram of a marine high-power ultrasonic pipeline anti-fouling device according to an embodiment of the present invention;

[0028] Figure 2 Schematic diagram of the components of the drive controller according to an embodiment of the present invention;

[0029] Figure 3 Schematic diagram of the anti-fouling pipeline arrangement in an embodiment of the present invention;

[0030] Figure 4 4 is an overall flow chart of the control method in an embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0032] It should be pointed out that, according to the needs of implementation, the various steps / components described in this application can be split into more steps / components, or two or more steps / components or partial operations of steps / components can be combined into new steps / components to achieve the purpose of the present invention.

[0033] Example 1: This embodiment provides a high-power ultrasonic pipeline anti-fouling device for ships, such as Figures 1 to 3 As shown, it mainly includes: a drive controller and multiple ultrasonic transducers;

[0034] Among them, the ultrasonic transducers are evenly arranged on the outer wall of the ship's seawater pipeline in a contact installation manner, the drive controller is equipped with a three-phase rectifier module, a power amplifier drive module, and a human-machine interface module, and the power amplifier drive module is equipped with a switching control circuit; the multiple ultrasonic transducers are respectively connected to the corresponding output terminals on the power amplifier drive module through corresponding control cables.

[0035] Furthermore, the ultrasonic transducer specifically adopts a piezoelectric ceramic transducer, and the maximum pulse power of a single ultrasonic transducer is not less than 2kW, and the effective range is not less than 3 meters; the ultrasonic transducers are all contact-mounted on the outer wall of the ship's seawater pipeline through a contoured base.

[0036] Furthermore, the shape and size of the contoured base are adapted to the outer contour of the seawater pipeline at the installation location, and the material of the contoured base is the same as that of the seawater pipeline.

[0037] Furthermore, the ultrasonic transducer is mounted on a corresponding contoured base via connecting bolts, and the contoured base is fixedly connected to a preset position on the outer wall of the seawater pipeline by welding.

[0038] Furthermore, the three-phase rectifier module is provided with a filter circuit, a power factor correction circuit and a phase-shifted full-bridge circuit, the input end of which is connected to the ship power supply, and the output end is connected to the power amplifier drive module, for converting the input ship power supply into a DC power supply and outputting it to the power amplifier drive module.

[0039] Furthermore, the power amplifier drive module is provided with a control circuit, a drive circuit and a power amplifier circuit. The control circuit is electrically connected to the human-machine interface module and the ship control system through a communication cable; the drive circuit synthesizes an electrical signal with specified waveform and frequency parameters according to the control signal output by the control circuit, and the power amplifier circuit uses a MOS tube and a transformer to amplify the power of the electrical signal and output it to the corresponding ultrasonic transducer.

[0040] Furthermore, a switching control circuit is provided in the power amplifier driving module, and the switching control circuit controls the on and off of each ultrasonic transducer control circuit through multiple relays. The switching control circuit performs interval operation control of each ultrasonic transducer according to a preset switching control algorithm.

[0041] Furthermore, the plurality of ultrasonic transducers are uniformly arranged along the outer wall of the ship's seawater pipeline in an up-down-up-down alternating pattern.

[0042] Example 2: This embodiment provides a marine high-power ultrasonic pipeline anti-fouling device, such as Figure 1As shown, it is mainly composed of a drive controller and an ultrasonic transducer, and can be used for the prevention and control of marine biological fouling in ship seawater pipelines; the drive controller serves as a power source, converting the ship's electricity into a high-power, high-frequency electrical signal, and outputting it to the ultrasonic transducer; the ultrasonic transducer adopts a piezoelectric ceramic transducer, which is installed on the outer wall of the pipeline system in a contact manner. It is a device for energy conversion, that is, converting the electrical energy input by the generator into mechanical energy of the same frequency vibration, and transmitting it to the medium to form an ultrasonic sound field; a single drive controller can drive no less than 4 ultrasonic transducers with a maximum pulse power of more than 2kW, and the range of action is no less than 3 meters.

[0043] Furthermore, the ultrasonic transducer uses a piezoelectric ceramic transducer with high electrical-to-acoustic energy conversion efficiency. The high-power ultrasonic waves generated kill and remove attached marine organisms, effectively improving the fouling prevention and control effect of seawater pipelines within the protection range. The transducer is installed on the outer wall of the pipeline or valve box in a contact manner, making disassembly and maintenance operations easy.

[0044] Furthermore, the ultrasonic transducer is installed using a contoured base, and the structural dimensions of the contoured base need to be designed according to the actual situation of the target pipeline or valve box; the contoured base is installed in contact with the pipeline or valve box through welding connection; the transducer body and the contoured base are fastened by studs; the material selection of the contoured base is consistent with the material of the pipeline to which it is connected.

[0045] Furthermore, the drive controller is used to convert the ship's electricity into a high-power, high-frequency electrical signal and output it to the ultrasonic transducer. Its function is mainly realized by the three-phase rectifier module, the power amplifier drive module, and the human-computer interaction module. The power amplifier circuit of the power amplifier drive module uses a MOS tube and a transformer to amplify the power of the electrical signal to ensure that the power of the electrical signal output to the transducer is large enough and the frequency is high enough to drive no less than 4 transducers with a maximum pulse power of more than 2kW; the drive controller has independent control and centralized control functions;

[0046] Furthermore, the control system of the drive controller is as follows: Figure 2As shown in the figure, it mainly includes a three-phase rectifier module, a power amplifier drive module, and a human-machine interface module, which are used to convert the ship power into a high-power, high-frequency electrical signal and output it to the ultrasonic transducer; among them, the three-phase rectifier module rectifies, filters, transforms and stabilizes the input ship power through a filter circuit, a power factor correction circuit, a phase-shifted full-bridge circuit, etc., and outputs stable DC power to power the power amplifier drive module; the power amplifier drive module mainly includes a control circuit, a drive circuit and a power amplifier circuit. The control circuit is designed with a single-chip microcomputer as the core, and provides control signals for adjusting the waveform, frequency, power and other control parameters of the output electrical signal. The drive circuit synthesizes an electrical signal with specified waveform, frequency and other parameters according to the control signal output by the control circuit. The power amplifier circuit uses MOS tubes and transformers to amplify the electrical signal to ensure that the power of the electrical signal output to the transducer is large enough and the frequency is high enough. In order to realize the simultaneous control of multiple transducers, a switching circuit is added to the drive controller power amplifier drive module, including a static isolation circuit and a switching circuit, to realize the transducer rotation working logic, and the path selection of the four transducers is determined by the relay switch; the human-machine interface module is used to realize the feedback of working status and parameters, which is convenient for manual adjustment and improves operability.

[0047] Furthermore, in order to realize the simultaneous control of multiple transducers, a switching circuit is added to the power amplifier drive module of the drive controller, and the path selection of multiple transducers is determined by the relay switch to realize the transducer rotation working logic; by setting the internal operating program of the drive controller, the transducers are operated at intervals, and reasonable switching of the drive control is realized, which hinders the attachment and growth of marine organisms on the inner wall of the pipeline, and controls the power consumption and heat generation of the device, thereby improving the reliability and cost-effectiveness of the device.

[0048] like Figure 3 As shown, this embodiment used a DN200, 2-meter-long TA2 pipe and a DN200, 2-meter-long B10 pipe from a ship's seawater pipeline, connected sequentially as test subjects. The four transducers of the high-power ultrasonic pipeline anti-fouling device were evenly arranged on the 4-meter-long test pipe section in an up-down-up-down arrangement. A drive controller was set to drive the transducers to alternately operate for 4 minutes every 2 hours, meaning each transducer operated for 1 minute. After a three-month test, the high-power ultrasonic pipeline anti-fouling device achieved excellent anti-fouling effectiveness, effectively slowing the fouling rate of titanium alloy and copper alloy seawater pipelines. The degree of marine biofouling in the TA2 pipeline was reduced by approximately 84% compared to a blank control pipeline without the device, and the degree of marine biofouling in the B10 pipeline was reduced by approximately 78% compared to a blank control pipeline without the device.

[0049] Example 3, based on the same inventive concept, this example also provides a control method for the above-mentioned marine high-power ultrasonic pipeline anti-fouling device, such as Figure 4 As shown, the specific steps include:

[0050] S1, grouping multiple ultrasonic transducers evenly distributed on the seawater pipeline, specifically, sequentially grouping four ultrasonic transducers arranged adjacent to each other in an up-down-up-down manner;

[0051] S2, sequentially starting each group of ultrasonic transducers at a preset time interval, specifically starting a group of ultrasonic transducers every time a preset interval time T0 passes, and each group of ultrasonic transducers is turned off after working for a preset time T1, and T1 < T0;

[0052] S3, performing cyclic switching control on the four ultrasonic transducers in each group in turn, specifically, each ultrasonic transducer in the same group stops working for a preset time T2 and then starts the next adjacent ultrasonic transducer, and T2×4=T1.

[0053] The preset interval time T0 is adjusted in real time according to the flow rate of the ship's seawater pipeline, specifically: T0 = C × V; wherein C is a preset correction coefficient, and V is the flow rate of the ship's seawater pipeline;

[0054] That is, the greater the flow velocity V of the seawater pipeline is, the longer the preset interval time T0 is, and the smaller the flow velocity V of the seawater pipeline is, the shorter the preset interval time T0 is.

[0055] Furthermore, all parts of this application that are not described in detail are the same as the existing technology or are implemented using the existing technology.

[0056] In summary:

[0057] 1. The present invention installs a contact ultrasonic transducer on the outer wall of the seawater pipeline, and cooperates with a high-power drive controller to use high-power ultrasonic waves to drive away and prevent fouling marine organisms. It can also remove attached marine organisms to a certain extent, thereby improving the anti-fouling effect of the device.

[0058] 2. The transducer of the present invention is arranged on the outer wall of the ship's seawater pipeline or valve box using a contact installation method and is installed by connecting the contoured base studs, making the overall disassembly, arrangement and maintenance of the device convenient without affecting the flow of seawater in the pipeline;

[0059] 3. The ultrasonic pipeline anti-fouling device of the present invention adopts a rotary control logic and realizes automatic adjustment of alternating intermittent operation by adding a switching circuit. It can effectively control power consumption and heat generation while ensuring the anti-fouling effect of the ship's seawater pipeline, improve the reliability of the device, and reduce the size of the device. It has broad application prospects.

[0060] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A control method for a marine high-power ultrasonic pipeline anti-fouling device, characterized by: The pipeline anti-fouling device includes a drive controller and multiple ultrasonic transducers. The ultrasonic transducers are evenly arranged on the outer wall of the ship's seawater pipeline using a contact installation method. The drive controller is equipped with a three-phase rectifier module, a power amplifier drive module, and a human-machine interface module. The power amplifier drive module is equipped with a switching control circuit. The multiple ultrasonic transducers are respectively connected to the corresponding output terminals on the power amplifier drive module through corresponding control cables. The control method comprises the following steps: S1, grouping multiple ultrasonic transducers evenly distributed on the seawater pipeline, specifically, sequentially grouping four ultrasonic transducers adjacently arranged in an up-down-up-down order; S2, sequentially starting each group of ultrasonic transducers at a preset time interval, specifically starting a group of ultrasonic transducers every time a preset interval time T0 passes, and each group of ultrasonic transducers is turned off after working for a preset time T1, and T1 < T0; S3, cyclically switching the four ultrasonic transducers in each group is controlled in sequence. Specifically, each ultrasonic transducer in the same group stops working for a preset time T2 and then starts the next adjacent ultrasonic transducer, and T2×4=T1.

2. The control method according to claim 1, wherein: The ultrasonic transducer specifically adopts a piezoelectric ceramic transducer, and the maximum pulse power of a single ultrasonic transducer is not less than 2kW, and the effective range is not less than 3 meters; the ultrasonic transducers are all contact-mounted on the outer wall of the ship's seawater pipeline through a contoured base.

3. The control method according to claim 2, wherein: The shape and size of the contoured base are adapted to the outer contour of the seawater pipeline at the installation location, and the material of the contoured base is the same as that of the seawater pipeline.

4. The control method according to claim 2, wherein: The ultrasonic transducer is mounted on a corresponding contoured base via connecting bolts, and the contoured base is fixedly connected to a preset position on the outer wall of the seawater pipeline by welding.

5. The control method according to claim 1, wherein: The three-phase rectifier module is equipped with a filter circuit, a power factor correction circuit and a phase-shifted full-bridge circuit. Its input end is connected to the ship power supply, and the output end is connected to the power amplifier drive module, which is used to convert the input ship power supply into a DC power supply and output it to the power amplifier drive module.

6. The control method according to claim 5, characterized in that: The power amplifier drive module is equipped with a control circuit, a drive circuit and a power amplifier circuit. The control circuit is electrically connected to the human-machine interface module and the ship control system through a communication cable. The drive circuit synthesizes an electrical signal with specified waveform and frequency parameters according to the control signal output by the control circuit. The power amplifier circuit uses a MOS tube and a transformer to amplify the power of the electrical signal and output it to the corresponding ultrasonic transducer.

7. The control method according to claim 6, characterized in that: The power amplifier drive module is further provided with a switching control circuit, which controls the on and off of each ultrasonic transducer control circuit through multiple relays. The switching control circuit performs interval operation control of each ultrasonic transducer according to a preset switching control algorithm.

8. The control method according to claim 1, wherein: The multiple ultrasonic transducers are specifically arranged evenly along the outer wall of the ship's seawater pipeline in an up-down-up-down alternating spacing manner.

9. The control method according to claim 1, wherein: The preset interval time T0 is adjusted in real time according to the flow rate of the ship's seawater pipeline, specifically: T0=C×V; where C is the preset correction coefficient and V is the flow rate of the ship's seawater pipeline.

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