WO2015137768A1

WO2015137768A1 - Apparatus for identifying surface defect of ocean structure

Info

Publication number: WO2015137768A1
Application number: PCT/KR2015/002454
Authority: WO
Inventors: 도현선; 이재민
Original assignee: 삼성중공업 주식회사
Priority date: 2014-03-13
Filing date: 2015-03-13
Publication date: 2015-09-17
Also published as: CN106104648A; JP2017518479A; CN106104648B; JP6345798B2

Abstract

Disclosed is an apparatus for identifying a surface defect of an ocean structure, which is capable of identifying a surface defect occurring in an ocean structure. The apparatus for identifying a surface defect of an ocean structure, according to an embodiment of the present invention, comprises: a hydrophilic paint layer stacked on the surface of a structure body of an ocean structure; and a waterproof coating layer stacked on the surface of the structure body on which the hydrophilic paint layer is stacked, wherein a crack occurs in the waterproof coating layer due to a defect on the surface of the structure body so that the hydrophilic paint layer is exposed to the outside.

Description

Surface defect identification device of offshore structure

The present invention relates to an apparatus for identifying surface defects of an offshore structure, and more particularly, to an apparatus for identifying surface defects on an offshore structure capable of identifying surface defects occurring in an offshore structure.

When reviewing recent cases of overturning or cutting of offshore structures such as ships or offshore plants, most of them are due to the fact that they are not aware of defects such as cracks in the structure in advance and their response is delayed. do.

Usually, accidents are prevented through regular non-destructive inspection, safety inspection of structures, and preliminary design standards, but it is impossible to always inspect them, and there are many limitations in conducting long-term inspections throughout the entire structure.

Korean Laid-Open Patent Publication No. 10-2011-0037435 also discloses a system for evaluating and controlling ship damage and a method of operating the same. Here, sensing equipment for monitoring stress, etc., such as ship damage is detected using a sensor. It may be attached and pre-aware. However, in this case, the cost and time-consuming tasks such as data collection and analysis take a long time, so it is impossible to respond quickly.

Particularly, the submerged part is a part in which the marine structure receives a constant fatigue load from the fluid, and the monitoring work on this part is more difficult.

The background art described above is technical information possessed by the inventors for the derivation of the present invention or acquired during the derivation process of the present invention, and is not necessarily a publicly known technique disclosed to the general public before the application of the present invention.

(Patent Document 1) Republic of Korea Patent Publication No. 10-2011-0037435

According to an embodiment of the present invention, when a defect including a crack or the like occurs in a part of the structure that is out of the operator's field of view due to the submerged in a fluid including water in an offshore structure, the operator has a defect. An object of the present invention is to provide an apparatus for identifying surface defects of an offshore structure that can easily identify a signal in a field of view.

Other objects of the present invention will be readily understood through the following description.

According to an aspect of the present invention, a hydrophilic paint layer provided on the surface of the structure of the offshore structure, and a waterproof coating layer laminated on the surface of the structure on which the hydrophilic paint layer is laminated, the waterproof coating layer is a defect on the surface of the structure Accordingly, there may be provided a surface defect identification apparatus of the offshore structure, in which cracks are generated to expose the hydrophilic paint layer to the outside.

The hydrophilic paint layer may be provided with a surface defect identification device of the offshore structure stacked in the form of a grid (grid channel) containing a hydrophilic paint.

The hydrophilic paint layer includes a hydrophilic paint and is provided with a surface defect identification device of the offshore structure comprising a first directional channel and a second directional channel disposed to deviate from the first directional channel and intersect the first directional channel. Can be.

The hydrophilic paint layer may be stacked in a dry state, and there may be provided a surface defect identification device of the offshore structure that is changed by moisture introduced through cracks of the waterproof coating layer damaged by defects occurring on the surface of the structure.

The hydrophilic paint layer may be provided with a surface defect identification device of the offshore structure in which the color is expressed or the color is changed by the water flowing through the crack portion of the waterproof coating layer.

The hydrophilic paint layer is laminated in a dry state, and then absorbs moisture introduced through the crack of the waterproof coating layer damaged by defects occurring on one side of the surface of the structure to deliver to the other side of the surface of the structure A surface defect identification device may be provided.

The hydrophilic paint layer comprises a channel containing a hydrophilic paint, the channel is made of a capillary channel to absorb the water flowing through the crack of the waterproof coating layer to move the water along the structure surface using a capillary phenomenon An apparatus for identifying surface defects of an offshore structure can be provided.

The channel may be provided with a surface defect identification device of the offshore structure having a tree structure shape that is narrow in the lower portion of the surface of the structure, the space is widened in the upper portion of the structure surface.

The hydrophilic paint layer and the waterproof coating layer may be laminated on the hull surface of the marine structure, and an end portion of the hydrophilic paint layer may be provided with a surface defect identification device of the marine structure extending to the upper draft of the marine structure.

The hydrophilic paint layer is laminated in a dry state, and is then expressed in a color corresponding to the hull surface color of the marine structure by moisture introduced through cracks of the waterproof coating layer damaged by defects occurring on the surface of the structure. There may be provided a surface defect identification device of the offshore structure that is to be changed or changed.

An identification unit connected to the hydrophilic paint layer and transmitting a signal relating to a defect on the surface of the structure, wherein the identification unit includes a power supply unit for supplying power and a notification unit for performing a designated notification operation when the power is supplied. And, it may be provided with a surface defect identification device of the offshore structure is connected to the hydrophilic paint layer and including a switching unit for determining whether or not the electrical connection of the power supply and the notification unit.

The switching unit may include a switching structure having a scissor structure in which a first support and a second support are cross-coupled with respect to a fixing pin; A conductor interposed between one end of the first support and one end of the second support; And an expander interposed between the other end of the first support and the other end of the second support, wherein the expandable body expands in volume in a state of absorbing moisture compared to a dry state, wherein the expandable body is connected to the hydrophilic paint layer. An apparatus for identifying abnormal symptoms of an offshore structure can be provided.

One end of the first support and one end of the second support meets both ends of the circuit formed by the power supply and the notification unit by the expansion of the expansion body of the offshore structure to establish an electrical connection through the conductor An abnormal symptom identification device may be provided.

The power supply unit may include a first battery and a second battery connected in series, and the switching unit may be provided with an abnormal symptom identification device of the marine structure interposed between the first battery and the second battery.

The notification unit may be provided with an apparatus for identifying abnormal symptoms of a marine structure, which is at least one of a light fixture that emits light, a speaker that outputs sound, and a wireless communication unit that transmits a designated signal to a designated terminal.

According to another aspect of the invention, the channel is installed on the surface of the structure of the offshore structure and the fluid is received; And an identification unit connected to the channel and displaying a volume of a fluid that varies according to a defect of the surface of the structure.

The channel may be provided to be broken when a defect occurs on the surface of the structure, so that the surface defect identification device of the offshore structure in which the volume of the fluid contained therein may be changed.

Wherein the channel is laminated on the surface of the structure stacked, and further comprising a paint layer cracking occurs according to the defect on the surface of the structure, the channel is external through the crack of the paint layer when a defect occurs on the surface of the structure An apparatus for identifying surface defects of an offshore structure in which the volume of the fluid is changed upon exposure to the liquid may be provided.

According to another aspect of the invention, the channel is installed on the surface of the structure of the offshore structure and the current flows; And an identification unit connected to the channel and displaying a magnitude of a current, voltage, resistance, or power amount depending on a defect of the surface of the structure.

The channel may be provided to be damaged when a defect occurs on the surface of the structure may be provided with a surface defect identification device of the offshore structure in which the magnitude of the current flowing through the channel is changed.

Wherein the channel is laminated on the surface of the structure stacked, and further comprising a paint layer cracking occurs according to the defect on the surface of the structure, the channel is external through the crack of the paint layer when a defect occurs on the surface of the structure An apparatus for identifying surface defects of an offshore structure that is exposed to and varies in magnitude of current flowing through the channel may be provided.

According to an embodiment of the present invention, when a defect including a crack or the like occurs in a part of a structure that is out of the operator's field of view, the operator may easily identify a signal appearing in accordance with the occurrence of the defect in the field of view. It can respond quickly and efficiently to surface defects of offshore structures.

In addition, when a crack occurs on one surface of the structure of the offshore structure and the fluid flows into the channel including the hydrophilic paint, the fluid is transferred to the upper end of the channel by capillary action to establish an electrical connection, thereby making it easy to surface defect outside the fluid. Can be observed.

On the other side, if a crack occurs on one surface of the structure of the offshore structure and the microtubule channel containing the fluid breaks, the microtubule channel is easily removed from the fluid by confirming that the fluid is lost through the breakage site of the microtubule channel, thereby reducing the volume of fluid. Surface defects can be observed.

In another aspect, if a crack occurs on one surface of the structure of the offshore structure and the resistance channel through which current flows is broken, it may be easily observed whether the surface defect is out of the fluid by confirming that the resistance value of the entire resistance channel decreases.

1 and 2 are views for explaining the principle of the surface defect identification apparatus of the marine structure according to the first embodiment of the present invention.

3 is a view showing the surface defect identification apparatus of the offshore structure to which the inner coating layer is added.

4 is a flow chart illustrating a channel coating method for surface defect identification of a marine structure according to a first embodiment of the present invention.

5 to 7 are views for explaining a channel coating method for surface defect identification of the offshore structure according to the first embodiment of the present invention.

8 is a view showing a marine structure in which the surface defect identification apparatus according to the first embodiment of the present invention is installed.

9 is a view showing a marine structure provided with a plurality of surface defect identification apparatus according to an embodiment of the present invention.

10 is a view showing an identification unit according to the first embodiment of the present invention.

11 and 12 are diagrams illustrating the operation of the switching unit.

13 is a view showing the surface defect identification apparatus of the offshore structure according to the second embodiment of the present invention.

14 and 15 are views showing the operation of the identification unit of the surface defect identification apparatus of the marine structure according to the second embodiment of the present invention.

16 is a view showing the surface defect identification apparatus of the offshore structure according to the third embodiment of the present invention.

17 and 18 are views showing the operation of the identification unit of the surface defect identification apparatus of the marine structure according to the third embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following examples are presented to fully convey the spirit of the present invention to those skilled in the art. The present invention is not limited to the examples set forth herein but may be embodied in other forms including all modifications included in the spirit and scope of the present invention or including equivalents or substitutes. The drawings may omit illustrations of parts not related to the description in order to clarify the present invention, and may be exaggerated to some extent in order to facilitate understanding.

In addition, when a component is said to be "connected" or "connected" to another component, it may be directly connected to or connected to the other component, but there may be other components in between. It should be understood. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. As used herein, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described on the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

In addition, terms such as “… unit”, “… module” described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software.

In addition, the components of the embodiments described with reference to the drawings are not limited to the corresponding embodiments, and may be implemented to be included in other embodiments within the scope of the technical spirit of the present invention. Even if the description is omitted, it is obvious that a plurality of embodiments may be reimplemented into one integrated embodiment.

In addition, in the description with reference to the accompanying drawings, the same components regardless of reference numerals will be given the same or related reference numerals and redundant description thereof will be omitted. In the following description of the present invention, if it is determined that the detailed description of the related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

In the first embodiment of the present invention, by modifying the process of applying the paint to the structure of the offshore structure including a ship, offshore plant, etc., it is easy to identify surface defects such as defects on the surface of the structure due to cracks, etc. I would like to make it possible. For example, when an abnormality occurs in the submerged structure portion of the offshore structure, it is intended to enable the operator to easily identify that the abnormality has occurred outside the water.

The principle that enables this identification is as shown in FIGS. 1 and 2.

On the other hand, the structure of the offshore structure in which the surface defect identification apparatus of the offshore structure according to the first embodiment of the present invention is installed is a structure such as a hull or hull of the offshore structure and a tank or the like installed inside the offshore structure. Include. However, the drawing shows an example surface defect identification device installed in the hull of the vessel.

An apparatus for identifying surface defects of a marine structure according to a first embodiment of the present invention includes a hydrophilic paint layer 22 laminated on a surface 10 of a marine structure, and a structure surface 10 on which a hydrophilic paint layer 22 is laminated. It includes a waterproof coating layer 23 laminated on.

The hydrophilic paint layer 22 may include a channel 40 including a hydrophilic paint that is well dissolved in water. In addition, the hydrophilic paint layer 22 may be installed between the waterproof coating layer 23 and the structure surface 10 to which the coating of the waterproofing component is applied to the hull. Accordingly, the hydrophilic paint layer 22 may be sealed by the waterproof coating layer 23.

FIG. 1 shows a state in which the hydrophilic paint layer 22 is coated by the waterproof coating layer 23 in a normal state to prevent contact with water. Therefore, the hydrophilic paint layer 22 does not change with time.

However, as shown in FIG. 2, when damage or crack occurs on the structure surface 10, the crack may be generated at a position corresponding to damage of the structure surface 10 even in the waterproof coating layer 23. Accordingly, the hydrophilic paint layer 22 is exposed through the crack of the waterproof coating layer 23, and the hydrophilic paint layer 22 absorbs the water flowing through the crack of the waterproof coating layer 23.

Meanwhile, the hydrophilic paint layer 22 and the waterproof coating layer 23 may be stacked to be in close contact with the structure surface 10. Therefore, when damage occurs on the structure surface 10, the stress generated by the damage may be transmitted to the waterproof coating layer 23 without causing loss of the waterproof coating layer 23.

In addition, in the process of laminating the hydrophilic paint layer 22 and the waterproof coating layer 23, a tensile modulus between the waterproof coating layer 23 and the structure surface 10 is measured using a technique such as polymer coating or surface treatment. You can match or similar. Therefore, even if damage occurs on the structure surface 10, no cracks occur in the waterproof coating layer 23, or cracks do not occur in the waterproof coating layer 23 even when the structure surface 10 is not damaged. can do.

The channel 40 of the hydrophilic paint layer 22 may be installed in various forms. For example, the channel 40 may include a first channel disposed in a first direction and a second channel disposed in a second direction that is displaced from the first direction. In addition, the first channel and the second channel may be provided to cross each other.

Alternatively, the channel 40 may be installed in the form of a grid channel. The grating channel may include a plurality of channels arranged to be perpendicular to each other, for example, may be arranged in a continuous square.

Meanwhile, the water absorbed by the hydrophilic paint layer 22 may move along the channel 40 by a capillary phenomenon to the upper end of the hydrophilic paint layer 22. For this purpose, it is necessary to make the hydrophilicity of the material which comprises the channel 40 of the hydrophilic paint layer 22 strong. For example, the channel 40 may have a myriad of pores of micro level or less.

The upper end of the channel 40 is connected to an identification device for establishing an electrical connection by a member that expands in a wet state so that a user or operator who is a sailor or a manager can be visually confirmed. The identification device will be described in detail later with reference to the related drawings.

Here, when absorbing water, the hydrophilic paint layer 22 may express a natural color, and may make it possible to visually identify a crack generation position. In this case, the hydrophilic paint can be made in the form of a thin film (eg, starch tape) or yarn made of colloidal particles of any color. In addition, the color expressed when the hydrophilic paint is in contact with the water may be a fluorescent color that is easily visible to the naked eye, or a color that may be more pronounced than the ground color of the structure surface 10 (eg, complementary colors such as black vs yellow). .

3 is a view showing the surface defect identification apparatus of the offshore structure to which the inner coating layer 21 is added.

1 and 2 illustrate the case where the hydrophilic paint layer 22 and the waterproof coating layer 23 are applied to the structure surface 10, but between the hydrophilic paint layer 22 and the structure surface 10 according to an embodiment. An inner coating layer 21 made of a waterproof paint may be further applied. That is, the structure surface 10 may be double waterproof.

Hereinafter, a channel coating method for identifying surface defects of a marine structure will be described with reference to related drawings.

4 is a flowchart illustrating a channel coating method for surface defect identification of a marine structure according to a first embodiment of the present invention, and FIGS. 5 to 7 illustrate surface defect identification of a marine structure according to the first embodiment of the present invention. It is a figure for demonstrating the channel coating method for this.

Hereinafter, a case in which the marine structure is a ship and the structure is a hull will be described as an example, and assuming that the triple coating is performed on the surface of the hull in the order of the inner coating layer 21, the hydrophilic paint layer 22, and the outer coating layer. Shall be.

First, the hull is first coated with a waterproof paint (step S110), and the inner coating layer 21 is laminated on the hull surface 10 (see FIG. 5). If necessary, this process of primary coating the hull with a waterproof paint may be omitted.

Next, the hydrophilic paint is taped in the form of the channel 40 (step S120) to stack the hydrophilic paint layer 22 (see FIG. 6). Here, the hydrophilic paint may be a material that is dissolved in contact with water. In general, it may have a dry tape form, which allows taping in the form of a channel 40.

When the taping of the hydrophilic paint is completed, the hull is recoated with the waterproof paint (step S130) and the outer coating layer 23 made of the waterproof paint is laminated on the hydrophilic paint layer 22 (see FIG. 7). In this case, when the vessel is not damaged, water penetration is suppressed by the waterproof coating of the outer coating layer 23, so that the hydrophilic paint can be maintained in a dry state.

Here, the channel 40 is a capillary channel made of a hydrophilic paint between the inner coating layer 21 and the waterproof coating layer 23, and surface defects such as cracks are generated at the bottom thereof, where water (for example, seawater) invades. In this case, moisture can penetrate up to the upper portion (eg, the deck) according to the capillary phenomenon.

The channel 40 may have a lattice pattern that is perpendicular to the vertical length at regular intervals across the surface of the ship.

Alternatively, the channel 40 may have a deformed lattice pattern similar to a tree structure in which the gap is narrow at the bottom and the gap is widened toward the top. When the channel 40 has a deformed lattice shape, the hydrophilic paint taping is concentrated at a point where surface defects are suspected, and at other points, the hydrophilic paint taping is alleviated to reduce the amount of hydrophilic paint, thereby reducing costs.

The channel 40 extends to the railing 30 installed on the deck, and its end is connected to the identification unit 50 installed in the railing 30.

In this case, since the channel 40 is also formed in the upper draft of the ship, it is possible to check the upper side of the channel 40 with the naked eye even when the vessel is submerged in water, so that the water penetrates according to the capillary phenomenon and the color of the channel 40. When this manifestation or change occurs, it is possible to visually identify surface defects on the lower part of the ship even with the naked eye.

In addition, if the trace of the channel 40 is expressed or changed, that is, the path through which the water has penetrated, the trace of the surface defect may be found, thereby enabling rapid response.

Surface defect identification device may be provided in plurality along the surface of the hull. In other words, it is possible to install a different surface defect identification device for each zone by dividing the zone on the surface of the hull. Although the drawing shows three surface defect identification devices are installed by dividing three zones in the longitudinal direction of the hull, the installation position and the number of surface defect identification devices can be differently selected as necessary.

When a plurality of surface defect identification devices are installed, it is possible to shorten the time for finding the point where the surface defect occurs by trace back the path through which water has penetrated the channel 40. For example, when a defect occurs in the hull surface of the bow portion, water flows into the hydrophilic paint layer 22 of the surface defect identification device installed in the bow portion and moves by capillary action along the channel 40 to channel 40. Will reach the top of. At this time, since the water does not flow into the hydrophilic coating layer 22 of the surface defect identification device installed in the middle or stern portion of the hull installed separately from the surface defect identification device installed in the bow portion, these channels 40 No moisture is observed at the top.

In other words, if a trace of water has penetrated the channel 40 of the surface defect identification device located at the athlete, the operator tracks the channel 40 of the surface defect identification device installed at the athlete to find the point where the surface defect has occurred. I can make it.

In the normal state, the notification unit does not perform any operation. In addition, as in general vessels may not be displayed on the appearance.

However, when a crack-like defect occurs on the surface of a ship submerged in water, a hydrophilic paint layer composed of a channel 40 made of a hydrophilic paint which can be dissolved by the introduced water, and water is introduced between the cracked surface and the coating film. As the moisture moves by the capillary phenomenon along 22), the identification unit 50 is operated to cause the notification unit to perform the notification operation.

In addition, the channel color of the channel 40 can be changed to facilitate identification of surface defects outside the hull. Here, the end of the channel 40 in the vessel made of the channel coating is located in the upper portion of the water immersion, that is, the draft of the vessel can be easily distinguished with the naked eye even outside the water.

Alternatively, a view point may be installed on the outside (for example, a deck of a ship) to easily check the hydrophilic paint color changed by the water coming up along the channel 40.

In the channel-coated marine structure according to the first embodiment of the present invention, even when a defect occurs in the coating of the structure, it is possible to recognize in advance, so that precautions such as corrosion can be taken in advance, thereby maintaining the integrity of the coating state. There is also an advantage to facilitate grasping.

In addition, the design of the shape, size, position, etc. of the channel 40 made of hydrophilic paint in the channel-coated marine structure, such as the characteristics of the hydrophilic paint, the time of the water soaking so that the capillary phenomenon can be expressed well, the location of the water, the stress This may be done by considering various factors such as concentration of the patient or frequency of fatigue. For example, the position of the channel 40 may be selected as the main position of a weld or the like in which the structure is most vulnerable.

Hereinafter, the identification unit 50 installed in the handrail 30 will be described in detail with reference to the drawings.

10 is a diagram showing an identification unit 50 according to the first embodiment of the present invention.

The identification unit 50 is connected to the upper end of the channel 40 and is deformed or changed by the water flowing along the channel 40 to actively indicate to the user or operator that a defect has occurred in the structure surface 10. can do.

10, identification unit 50, handrail 30, channel 40, first battery 51a, second battery 51b, alarm unit 52, switching unit 53, conductor 62, The inflatable body 61, the switching structure 60, the first support 60a, and the second support 60b are shown.

Identification unit 50 according to the first embodiment of the present invention is connected to the upper end of the channel 40, for example, may be installed in the handrail 30 provided around the deck of the offshore structure.

The identification unit 50 is an open circuit (closed circuit) by the water (moisture) up the channel 40, the open circuit (close circuit), the source of the source through the notification method such as turn on, speaker output, wireless signal transmission, etc. Alternatively, administrators can inform users or workers that a surface defect has occurred.

The identification unit 50 includes a power supply unit, a notification unit 52, a switching unit 53.

The power supply unit and the notification unit 52 may be implemented as a circuit in which electrical connection establishment is determined by the switching operation of the switching unit 53. Therefore, when the power supply unit and the notification unit 52 are basically in an open circuit and the switching unit 53 establishes an electrical connection, the power supply unit and the notification unit 52 become a closed circuit, and electricity flows through the entire circuit, so that the notification unit 52 can perform a specified operation. Will be.

The power supply unit may include a first battery 51a and a second battery 51b. The first battery 51a and the second battery 51b are electrical energy generators that can be inserted into the handrail 30, and a battery or the like can be used, for example.

The switching unit 53 is interposed between the first battery 51a and the second battery 51b to determine whether to establish an electrical connection between the first battery 51a and the second battery 51b.

The switching unit 53 is connected to the upper portion of the channel 40, and performs the switching operation by the moisture raised by the capillary phenomenon through the channel 40 to establish an electrical connection.

The notification unit 52 is connected in series with the first battery 51a and the second battery 51b, and outputs a predetermined signal to the outside when an electrical connection is established.

For example, the notification unit 52 may be a light fixture such as an incandescent lamp or an LED to emit light or a speaker to output a predetermined sound or a wireless communication device to transmit a designated signal to a terminal possessed by a predetermined operator.

The operator can identify the surface defects of the offshore structure through light, sound or the terminal output signal, etc., so that necessary actions can be taken.

Here, the switching unit 53 includes a switching structure 60, a conductor 62, and an expander 61 having a scissors structure.

The switching structure 60 includes two

supports

60a and 60b which intersect the fixing pin 63 and a conductor 62 is formed at one end of the first support 60a and the second support 60b. It is interposed and the other end is the expansion body 61 is interposed.

The expander 61 is connected to the end of the channel 40 and may be made of a material in which the volume is expanded in a wet state in which moisture is absorbed compared to a dry state. For example, the expandable body 61 may be made of a material such as silica gel.

One end of the first support body 60a is close to the first battery 51a, and one end of the second support body 60b is close to the second battery 51b.

Next, the switching operation of the switching unit 53 will be described with reference to the drawings.

11 and 12 are diagrams illustrating the operation of the switching unit.

First, the inflated body 61 interposed between the other end of the first support 60a and the other end of the second support 60b has a small volume in a dry state and the one end of the first support 60a and the second support 60b. One end of is in a state where it does not contact the first battery 51a and the second battery 51b, respectively (see FIG. 11). Referring to the drawings, the end of the conductor 62 and the first battery 51a are spaced apart by d so that an electrical connection is not established.

When moisture is transferred along the channel 40 due to surface defects such as cracks, the expander 61 absorbs and expands the first support 60a and the second support 60b. The first battery 51a which is open at both ends of the first support body 60a and the second support body 60b at both ends of the circuit formed by the power supply unit and the notification unit 53, respectively. It comes in contact with the second battery 51b (see FIG. 12). A conductor 62 is interposed between one end of the first support 60a and one end of the second support 60b, so that both ends of the conductor 62 are respectively the first battery 51a and the second battery 51b. ), An electrical connection can be established between the first battery 51a and the second battery 51b.

Here, the conductor 62 has a length greater than or equal to the distance between the first battery 51a and the second battery 51b so that a smooth electrical connection can be established.

In addition, the expandable body 61 may be solidified in an expanded state when absorbing moisture to allow the electrical connection to be established for a predetermined time or more.

The above description has been made on the assumption that the power supply unit is composed of two batteries, but this is only the first embodiment, and it is natural that only one battery may be configured in some cases. In the case of one battery, it is sufficient for the switching unit to have a connection relationship for switching the open circuit composed of the battery and the notification unit to the closed circuit.

The surface defect identification device of the marine structure according to the second embodiment of the present invention may include a channel 41 having a tube shape for receiving a fluid. For example, the channel 41 may be provided as a microtubule. In addition, the fluid contained in the channel 41 includes a gas that dissolves in water and a gas that does not dissolve, and includes a hydrophobic liquid and a hydrophilic liquid.

The channel 41 may be installed in various forms. For example, the channel 41 may include a first channel disposed in a first direction and a second channel disposed in a second direction that is a direction shifted from the first direction. In addition, the first channel and the second channel may be provided to cross each other.

Alternatively, the channel 41 may be installed in the form of a grid channel. The grating channel may include a plurality of channels arranged to be perpendicular to each other. For example, the channel 41 may be disposed in a continuous square or may have a lattice pattern in which the vertical and horizontal lines are perpendicular to each other at regular intervals throughout the surface of the ship.

Alternatively, the channel 41 may have a deformed lattice pattern similar to a tree structure in which the gap is narrow at the bottom and the gap is widened toward the top.

Channel 41 may be provided such that cracks occur or break due to damage to structure surface 10. To this end, the channels 41 may be stacked to be in close contact with the structure surface 10. Therefore, when damage occurs to the structure surface 10, the stress generated by the damage may be induced without causing a crack in the channel 41.

On the other hand, the channel 41 can be housed inside a paint layer that is stacked on the structure surface 10. In this case, the channel 41 may be provided as a microtube having a diameter smaller than the thickness of the paint layer.

The fluid received in the channel 41 is provided to be sealed by the channel 41 in a normal state so that contact with the water is blocked. Therefore, the fluid contained in the channel 41 does not occur in the volume change with the change of time.

However, if damage or cracks occur on the structure surface 10, cracks will occur at locations corresponding to the damage of the structure surface 10 of the channel 41. Therefore, the fluid is exposed to water through the crack of the channel 41.

At this time, the volume of the fluid depends on whether or not the pressure of the fluid contained in the channel 41 is greater than or less than the pressure outside the channel 41 (for example, the hydraulic pressure corresponding to the break position of the channel 41). It will shrink or grow.

For example, when the pressure of the fluid is greater than the pressure outside the channel 41, the fluid leaks to the outside, thereby reducing the volume of the fluid contained in the channel 41. On the contrary, when the pressure of the fluid is less than the pressure outside the channel 41, water is introduced into the channel 41 through the crack of the channel 41, thereby increasing the volume of the fluid accommodated in the channel 41.

Alternatively, the channel 41 may include a porous material capable of holding a fluid, and may be provided to be sealed by a waterproof material. Therefore, the fluid contained in the channel 41 may be blocked from the outside to maintain a constant volume. As an example, the channel 41 may be installed between the paint layer provided with the waterproof material and the surface 10 of the structure, and may be sealed by the waterproof paint layer.

Alternatively, the channel 41 may be installed between the waterproof coating layer laminated on the structure surface 10 and the paint layer provided with the waterproof material.

Channel 41 is coated in a normal state by a waterproof paint layer to block contact with water. Therefore, the fluid contained in the channel 41 does not generate a volume change with time.

However, if damage or crack occurs in the structure surface 10, the crack will occur at a position corresponding to the damage of the structure surface 10 of the paint layer sealing the channel 41. Therefore, the channel 41 is exposed to water through the crack of the paint layer.

At this time, the volume of the fluid is reduced or increased depending on whether the pressure of the fluid contained in the channel 41 is greater or smaller than the pressure outside the channel 41.

For example, when the pressure of the fluid is greater than the pressure outside the channel 41, the fluid contained in the channel 41 leaks to the outside, thereby reducing the volume of the fluid received or absorbed by the channel 41. On the contrary, when the pressure of the fluid is lower than the pressure outside the channel 41, water is absorbed into the channel 41 through the crack of the paint layer, thereby increasing the volume of the fluid received or absorbed by the channel 41.

On the other hand, the paint layer may be laminated to be in close contact with the structure surface (10). Accordingly, when damage occurs on the structure surface 10, the stress generated by the damage may be transferred to the paint layer without causing loss, thereby inducing cracks.

In addition, in the process of laminating the paint layer on the structure surface 10, a technique such as polymer coating or surface treatment may be used to match or similar the tensile rate between the paint layer and the structure surface 10. have. Accordingly, an error situation such as cracks in the paint layer even when damage occurs on the structure surface 10 or cracks in the paint layer even when damage does not occur on the structure surface 10 can be eliminated.

By preventing the channel 41 from being covered by the paint layer and being exposed to the outside, the channel 41 may be prevented from being damaged by external impact or corrosion even when the structure surface 10 is not damaged. This is because if the channel 41 is broken regardless of whether the structure surface 10 is damaged, an operator may mistake the structure surface 10 for damage.

In addition, when the channel 41 is covered by the paint layer and is not exposed to the outside, the beautiful appearance of the marine structure may not be impaired.

The identification unit 70 may be connected to an upper portion of the channel 41. For example, the channel 41 extends to the railing 30 installed on the deck, and its end may be connected to the identification unit 70 installed in the railing 30.

The identification unit 70 is connected to the upper end of the channel 41 and is deformed or changed according to the volume of the fluid inside the channel 41 to actively indicate to the user or operator that a defect has occurred in the structure surface 10. can do.

Next, the identification unit 70 according to the second embodiment of the present invention will be described with reference to FIGS. 14 and 15.

14 and 15 are views showing the operation of the identification unit 70 of the surface defect identification apparatus of the marine structure according to the second embodiment of the present invention.

The identification unit 70 may be provided to communicate with the upper end of the channel 41, and may provide an accommodation space for accommodating the fluid accommodated in the channel 41. At this time, the width or diameter of the identification unit 70 may be provided to be relatively larger than the width or diameter of the channel 41.

On the other hand, the identification unit 70 may include a notification unit 71 for providing information about the volume of the fluid accommodated in the channel (41). As an example, the illim portion 71 may be provided with a scale indicating the level of the fluid contained in the identification unit (70).

As shown in FIG. 14, in the steady state, the level of the fluid contained in the identification unit 70 in communication with the channel 41 is within the normal scale range. However, when the channel 41 is damaged due to the damage of the structure surface 10 and a part of the fluid contained in the channel 41 flows out, the level of the fluid contained in the identification unit 70 is lowered. By confirming that the level of the fluid contained in the identification unit 70 is outside the normal scale range, it is possible to predict that damage has occurred to the structure surface 10.

In addition, when the identification unit 70 is formed above the draft of the vessel, even if the vessel is submerged in the water to see the change in the volume of the fluid accommodated inside the identification unit 70 with the naked eye to the naked eye As a result, it is possible to identify that a surface defect has occurred at the bottom of the ship.

An apparatus for identifying surface defects of a marine structure according to a third embodiment of the present invention includes a channel 42 made of a resistor including a conductive material and a wire 81 connected to both sides of the channel 42 so that current flows. It may include a battery 82 to be connected, and a notification unit 83 connected to the wire (81).

Channel 42 may function as a resistor in a circuit connected with battery 82. That is, the current flowing from the battery 82 flows along the wire 81 and the channel 42 to form a closed circuit.

The notification unit 83 includes a voltmeter branched from the wire 81 at both sides of the battery 82 and connected in parallel, an ammeter connected in series with the battery 82, or a power meter connected in parallel or in series with the battery 82. can do.

The channel 42 may be installed in various forms. For example, the channel 42 may include a first channel disposed in a first direction and a second channel disposed in a second direction that is displaced from the first direction. In addition, the first channel and the second channel may be provided to cross each other.

Alternatively, the channel 42 may be installed in the form of a grid channel. The grating channel may include a plurality of channels arranged to be perpendicular to each other. For example, the channels 42 may be arranged in a continuous square or may have a lattice pattern in which the vertical and horizontal lines are perpendicular to each other at regular intervals throughout the surface of the ship.

Alternatively, the channel 42 may have a deformed lattice pattern similar to a tree structure in which the gap is narrow at the bottom and widened toward the top.

Channel 42 may be provided to be sealed with a non-conductive material. Therefore, the current flowing along the channel 42 does not leak to the outside to maintain a constant amount of current. As an example, the channel 42 may be installed between the paint layer provided with the non-conductive material and the surface 10 of the structure, and may be sealed by the non-conductive paint layer.

On the other hand, when the surface 10 of the structure is provided with a conductive material, the surface 10 of the structure may be coated with a non-conductive material. In this case, the channel 42 may be installed between the paint layer provided by the non-conductive material and the non-conductive coating laminated to the structure surface 10.

Channel 42 is coated with a non-conductive paint layer at normal state to block contact with water. Therefore, the amount of current flowing through the channel 42 does not change with time.

However, if damage or cracks occur on the structure surface 10, cracks will occur at a position corresponding to damage to the structure surface 10 of the paint layer that has sealed the channel 42. Therefore, the channel 42 is exposed to water through the crack of the paint layer, and the current flowing through the channel 42 leaks to the water.

By preventing the channel 42 from being covered by the paint layer and being exposed to the outside, the channel 42 may be prevented from being damaged by external impact or corrosion even when the structure surface 10 is not damaged. This is because if the channel 42 is broken regardless of whether the structure surface 10 is damaged, an operator may mistake the structure surface 10 for damage.

In addition, when the channel 42 is covered by the paint layer and is not exposed to the outside, the beautiful appearance of the marine structure may not be impaired.

Alternatively, the channel 42 may be provided to be broken by damage or crack of the structure surface 10. For this purpose, the channel 42 may be installed to be in close contact with the structure surface 10. Thus, in the event of damage to the structure surface 10, the stress generated by the damage may be induced without causing loss of the channel 42. In this case, the channel 42 may be provided as a conductor that is easily broken by shear stress.

If damage occurs on the surface of the structure 10 and breakage occurs in the channel 42, the current resistance of the resistor 42 constitutes the channel 42 becomes small while no current flows through the broken channel 42. .

The identification unit 80 may be connected to the upper portion of the channel 42. For example, the channel 42 extends to the railing 30 installed on the deck, and its end may be connected to the identification unit 80 installed in the railing 30.

The identification unit 80 is connected to the upper end of the channel 42 and is deformed or changed according to the volume of the fluid inside the channel 42 to actively indicate to the user or operator that a defect has occurred in the structure surface 10. can do.

Next, the identification unit 80 according to the third embodiment of the present invention will be described with reference to FIGS. 17 and 18.

17 and 18 are views showing the operation of the identification unit 80 of the surface defect identification apparatus of the marine structure according to the third embodiment of the present invention.

The identification unit 80 may include a circuit connected with the channel 42. For example, the circuit constituting the identification unit 80 includes a wire 81 connected at both sides of the channel 42, and a battery 82 connected to the wire 81 to send a current to the channel 42. And a notification unit 83 connected to the wire 81 to measure and display the amount of current, voltage, or power flowing in the wire 81.

The notification unit 83 may include a display needle 83b provided to move between the scale 83a and the scale. In this case, the value indicated by the scale 83a indicates the magnitude of the current when the alarm 83 is an ammeter, the magnitude of the voltage when the alarm 83 is a voltmeter, or the alarm 83 is an electric power meter. In this case, the amount of power is shown.

As shown in FIG. 17, in the normal state, the display size of the current, voltage, or power amount flowing through the channel 42 is within the normal scale range. However, as the structure surface 10 is damaged, the resistance value of the channel 42 is changed, and the operator confirms that the indication of the alarm unit 83 is out of the normal scale range, indicating that the structure surface 10 is damaged. It can be predicted.

For example, suppose that the alarm unit 83 is an ammeter.

First, when the channel 42 is exposed to water by the damage of the surface 10 of the structure and is shorted, the current flowing through the channel 42 is released into the water to reduce the amount of current. Therefore, when the magnitude of the current indicated by the alarm unit 83 becomes smaller than the normal range, the worker may determine that the surface 10 of the structure is damaged.

Secondly, if the channel 42 is broken by damage to the surface 10 of the structure, the voltage across the cell 82 is constant and the resistance value of the channel 42 is reduced, thereby causing the channel 42 to be broken. The amount of current flowing through is increased. Therefore, the worker may determine that the surface 10 of the structure is damaged when the magnitude of the current indicated by the alarm unit 83 is larger than the normal range.

On the other hand, when the voltage of the battery 82 fluctuates, the display of the notification unit 83 may occur outside the normal range even when the structure surface 10 is not damaged. Therefore, the battery 82 may be charged through the spare battery in order to keep the voltage of the battery 82 constant. For example, the voltage of the battery 82 may be constantly maintained through the solar panel.

In addition, when the identification unit 82 is formed in the upper draft of the vessel, even if the vessel is submerged in the water to confirm that the change in the notification unit 83 of the identification unit 82 with the naked eye to the naked eye It is possible to identify that a surface defect has occurred at the bottom of the ship.

Although the above has been described with reference to embodiments of the present invention, those skilled in the art may variously modify the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. And can be changed.

Although the present invention has been described with reference to the first embodiment shown in the accompanying drawings, this is merely an example, and those skilled in the art may various modifications and other equivalent embodiments therefrom. You will understand. Therefore, the true scope of the invention should be defined only by the appended claims.

(Explanation of the sign)

10: structure surface, 21: inner coating layer,

22: hydrophilic coating layer, 23: waterproof coating layer,

30: handrail, 40: channel,

50: identification unit, 51a, 51b: battery,

52: notification unit, 53: switching unit,

60: switching structure, 60a: first support,

60b: second support, 61: expandable body,

62: conductor, 70: identification unit,

71: notification unit, 80: identification unit,

81: electric wire, 82: battery,

83: notification unit.

Claims

Hydrophilic paint layer provided on the surface of the structure of the offshore structure, and

A waterproof coating layer laminated on a surface of the structure in which the hydrophilic paint layer is laminated;

The waterproof coating layer is a surface defect identification device of the offshore structure to cause cracks in accordance with the defect on the surface of the structure to expose the hydrophilic paint layer to the outside.
The method of claim 1,

The hydrophilic paint layer is a surface defect identification device of the marine structure stacked in the form of a grid (grid channel) containing a hydrophilic paint.
The method of claim 1,

And the hydrophilic paint layer comprises a hydrophilic paint and includes a first directional channel and a second directional channel disposed to deviate from the first directional channel and intersect the first directional channel.
The method of claim 1,

The hydrophilic paint layer is laminated in a dry state, the surface defect identification device of the offshore structure is changed by the water introduced through the crack of the waterproof coating layer is damaged by a defect occurring on the surface of the structure.
The method of claim 4, wherein

The hydrophilic paint layer is a surface defect identification device of the offshore structure that the color is expressed or the color is changed by the water flowing through the crack portion of the waterproof coating layer.
The method of claim 1,

The hydrophilic paint layer is laminated in a dry state, and then absorbs moisture introduced through the crack of the waterproof coating layer damaged by defects occurring on one side of the surface of the structure to deliver to the other side of the surface of the structure Surface defect identification device.
The method of claim 6,

The hydrophilic paint layer comprises a channel containing a hydrophilic paint, the channel is made of a capillary channel to absorb the water flowing through the crack of the waterproof coating layer to move the water along the structure surface using a capillary phenomenon Device for identifying surface defects of offshore structures.
The method of claim 2,

And the channel has a tree structure shape having a narrow space at a lower portion of the surface of the structure and a wide space at the upper portion of the surface of the structure.
The method of claim 1,

The hydrophilic paint layer and the waterproof coating layer are laminated on the hull surface of the marine structure,

And an end portion of the hydrophilic paint layer extends to a top of the draft of the marine structure.
The method of claim 9,

The hydrophilic paint layer is laminated in a dry state, and is then expressed in a color corresponding to the hull surface color of the marine structure by moisture introduced through cracks of the waterproof coating layer damaged by defects occurring on the surface of the structure. Apparatus for identifying surface defects in sea structures that are to be changed or changed.
The method of claim 1,

It further comprises an identification unit connected to the hydrophilic paint layer for transmitting a signal relating to a defect on the surface of the structure,

The identification unit includes a power supply unit for supplying power, a notification unit for performing a designated notification operation when the power is supplied, and a switching unit connected to the hydrophilic paint layer and determining whether the power unit and the notification unit are electrically connected. Device for identifying surface defects of offshore structures.
The method of claim 11,

The switching unit,

A switching structure of a scissor structure in which a first support and a second support are cross-linked around a fixing pin;

A conductor interposed between one end of the first support and one end of the second support; And

Interposed between the other end of the first support and the other end of the second support, and includes an expander to expand the volume in the state of absorbing moisture compared to the dry state,

And said inflatable body is connected to said hydrophilic paint layer.
The method of claim 12,

One end of the first support and one end of the second support meets both ends of the circuit formed by the power supply and the notification unit by the expansion of the expansion body of the offshore structure to establish an electrical connection through the conductor Abnormal symptoms identification device.
The method of claim 11,

The power supply unit includes a first battery and a second battery connected in series,

And the switching unit is an abnormal symptom identifying device of the marine structure interposed between the first battery and the second battery.
The method of claim 11,

The notification unit is at least one of a light fixture for emitting light, a speaker for outputting sound, a wireless communication device for transmitting a designated signal to a designated terminal abnormal symptoms of the marine structure.
A channel installed on the surface of the structure of the offshore structure and containing fluid therein; And

And an identification unit connected to the channel and indicating a volume of the fluid contained in the channel that depends on a defect in the surface of the structure.
The method of claim 16,

The channel is provided to be broken when a defect occurs on the surface of the structure surface defect identification apparatus of the offshore structure is changed in the volume of the fluid contained therein.
The method of claim 16,

And a paint layer laminated on the surface of the structure in which the channels are stacked, and wherein cracks occur according to defects on the surface of the structure.

And the channel is exposed to the outside through the crack of the paint layer when a defect occurs in the surface of the structure, the surface defect identification device of the offshore structure changes the volume of the fluid.
A channel through which the current flows and is installed on the surface of the structure of the marine structure; And

And an identification unit connected to the channel and indicating a magnitude of a current, a voltage, a resistance, or an amount of power of a circuit connected to a channel that depends on a defect of the surface of the structure.
The method of claim 19,

And the channel is damaged so that when a defect occurs on the surface of the structure, the surface defect identification device of the marine structure in which the magnitude of current flowing through the channel is changed.
The method of claim 19,

And a paint layer laminated on the surface of the structure in which the channels are stacked, and wherein cracks occur according to defects on the surface of the structure.

And the channel is exposed to the outside through the crack of the paint layer when a defect occurs in the surface of the structure, the surface defect identification device of the offshore structure that the magnitude of the current flowing through the channel is changed.