KR101679225B1 - rotary duct for prevening adhesion of marine organism - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary type sea water pipe for preventing marine life adherence, and more particularly, to a rotary type sea water pipe for preventing marine life from adhering to the inside of a channel by changing the speed or direction of a fluid inside the channel, It relates to the sea water pipe.
The rotary sea water pipe for preventing marine life adherence according to the present invention comprises a channel having a channel formed therein so that seawater can flow, a support portion provided outside the channel to support the channel, And rotating means for changing the speed or direction of the fluid in the pipe by rotating the pipe.

Description

Rotary duct for prevening adhesion of marine organism

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary type sea water pipe for preventing marine life adherence, and more particularly, to a rotary type sea water pipe for preventing marine life from adhering to the inside of a channel by changing the speed or direction of a fluid inside the channel, It relates to the sea water pipe.

Attachment of biological organisms is caused by microorganisms, bacteria, and marine organisms. Bioanalysis refers to the phenomenon that marine organisms reproduce along with water and structures in water.

This phenomenon increases the weight of the structure to reduce the effective buoyancy, increases the effective volume and cross-sectional area of the structure, increases the fluid resistance, and may cause the damage due to local resistance or fatigue strength of the structure. Particularly, the bioadhesion that occurs inside the pipeline that transports the fluid acts as a resistance against the internal flow to the fluid, thereby degrading the function of the pipeline.

The sites where biofouling occurs mainly include ship water inflow and outflow, deep sea water intake pipes, temperature difference generation, and water intake pipes for heating and cooling. The ship's seawater outflow channel is an important conduit for sea water cooling and ballasting for ship balancing. Seawater inflow is carried out through a sea chest, and attached organisms are attached to pipelines connected to seawater pumps, reducing the amount of seawater required, resulting in enormous obstacles to engine operation and vessel balance. In order to generate the temperature difference, a large amount of seawater must be taken, and the efficiency of the power generation may be reduced and the facility may be shut down due to the attachment of living organisms to the inside of the intake pipe and the heat exchanger. In addition, in the case of deep sea water intake, the high nutrient content contained in the deep sea water can promote the growth of algae or microalgae, thereby enhancing the bioadhesion rate.

At present, methods of preventing biofouling are used, such as chlorine injection, electricity, paint or plating. Korean Utility Model Registration No. 20-0155683 discloses an apparatus for automatically injecting chlorine in a seawater facility, Japanese Laid-Open Patent Publication No. 1020100017854 discloses an apparatus for preventing marine biofouling, Japanese Patent Application Laid-Open No. 10-2005-0101532 An anti-adhesion agent is disclosed.

The method using chlorine and electricity is largely an external power supply method and a sacrificial (dielectric) bipolar method. There are MGPS and ICCP methods applied to ships. MGPS may cause sechest pavement due to improper management and operation, and there is a risk of sinking accident due to inundation of engine room. In addition, due to the misuse of the ICCP by the external power supply method installed for the hull system, it is necessary to incur huge economic losses by promoting corrosion across the hull. Particularly when the external power supply method is applied, there is a fear that the hydrogen embrittlement may be broken in a very short time due to the influence of molecular hydrogen or atomic hydrogen due to dislocation imbalance due to dislocation, However, if the method is not performed under the optimum method, it may be prematurely corroded by the active dissolution reaction and may be broken. In other words, there is a risk of promoting the corrosion of the hull or the related pipeline rather than the prevention of the biofouling, due to the carelessness, the potential, and the current fluctuation.

Since the use of tributyltin (TBT) has been regulated due to its toxicity, the use of paints is now widely used as a primary antifouling method due to the development of various environmentally friendly paints. However, paints and plating are used in different materials depending on the material, purpose and required performance of the metal, and there is a risk of local damage due to insufficient work. The antifouling performance is maintained for a certain period, It is necessary to repair it periodically. Therefore, in recent years, selective preventive measures have been applied in consideration of economical add / drop compared to facilities or structures. Nevertheless, the biggest problem of the above mentioned measures is the economic loss due to the installation cost and the periodic repair, and also the cost of repairing the damage or loss due to the careless operation of the apparatus using chlorine injection or electricity incidentally.

Conventional bioadhesion prevention devices and techniques require periodic maintenance and maintenance by using chlorine, electricity, and paint as described above. The cost of installation, maintenance, and management according to the range of the prevention sites And the cost is also high. In addition, as environment - friendly aspect has been developed, the use of chlorine and electricity after the regulation of toxic paints has become common, but it can not be considered eco - friendly because it is killed for the purpose of preventing the attachment of living things. Therefore, there is a need for an environmentally friendly bioadhesion prevention system that can solve these problems and use it semi-permanently at an initial cost.

1. Korean Registered Utility Model No. 20-0155683: Automatic Chlorine Injection System for Seawater Facilities 2. Korean Patent Laid-Open No. 1020100017854: Marine Organism Attachment Prevention Device 3. Korean Patent Publication No. 10-2005-0101532: An agent for preventing adhesion of aquatic organisms

The present invention has been made to overcome the above problems, and it is an object of the present invention to provide a method of changing the speed or direction of a fluid inside a pipe by rotating a pipe installed in the water, So that it is possible to prevent the water from being adhered to the rotating water tank.

In order to accomplish the above object, the present invention provides a rotary type sea water pipe for preventing marine biofilm attachment, comprising: a channel having a channel formed therein for circulating seawater; A support provided outside the conduit to support the conduit; And rotation means for rotating the pipe to change the speed or direction of the fluid in the pipe to prevent marine life from attaching to the inner wall of the pipe.

The rotating means includes a driven gear formed on an outer periphery of the pipe, a driving gear engaged with the driven gear, and a driving unit for rotating the driving gear.

The support portion includes a hollow cylindrical housing having a hollow structure with an interior hollow to allow the pipeline to pass therethrough, and a fixing member for fixing the housing to a structure or seabed.

A rib is formed on the inner wall of the channel so as to protrude a turbulent flow of the fluid.

The ribs are elongated from one side of the conduit to the other side.

The ribs are helically twisted.

And a controller for controlling the rotation direction and the rotation speed of the pipe according to at least one of a flow rate, a pressure, and a temperature inside the pipe.

The controller includes a sensor unit installed in the conduit to measure at least one selected from a flow rate, a pressure, and a temperature, and a controller receiving the signal output from the sensor unit and controlling the operation of the rotating unit.

As described above, according to the present invention, by rotating the channel through which seawater flows, the flow velocity and direction of the fluid at the inner wall of the channel can be changed irregularly, and the attachment of marine organisms to the inside of the pipe can be fundamentally prevented.

Further, the present invention provides a method for attaching environmentally friendly marine life that is not harmful to the environment because it prevents the attachment of marine life by a physical method.

1 is a side view of a rotary type sea water pipe according to an embodiment of the present invention,
Fig. 2 is a perspective view excerpted from the main part of Fig. 1,
3 is a partially cutaway perspective view of a pipeline according to another embodiment of the present invention,
4 is a front view of the channel shown in Fig. 3
5 and 6 are perspective views respectively showing a channel according to another embodiment of the present invention,
7 is a block diagram schematically showing a configuration of a main portion of a rotary type sea water pipe according to another embodiment of the present invention,
8 is a side view of a rotary sea water pipe according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a rotary sea water pipe for preventing attachment of marine life according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The cause of the marine organisms' attachment to the inside of the underwater pipeline is caused by the combination of various factors, but the main factors are the water temperature, the illumination of the channel and the flow rate. The organism attachment in the tube starts from the entrance of the channel and propagates to the inside. It is difficult to adhere due to the flow rate during the inflow and outflow of the fluid, but when the stagnation of the fluid occurs or the flow rate approaches the laminar flow, the possibility of adhesion increases. In addition, since the attachment is easy when the flow rate is stopped, the frequency of attachment and the growth rate increase exponentially with water temperature and roughness. Therefore, the velocity and direction of the fluid can be changed at the interface between the inner wall of the pipe and the fluid, so that the bioadhesion in the pipe can be prevented originally.

Accordingly, the present invention is intended to effectively prevent the attachment of marine organisms by irregularly changing the flow velocity and direction of the pipe wall portion in contact with the fluid in the channel, and accordingly the fluid force. Unlike conventional technologies, this type of marine biofouling prevention technology is environmentally friendly and thus has no environmental pollution.

1 and 2, a rotary type sea water pipe according to an embodiment of the present invention includes a channel 10 having a channel formed therein for circulating seawater, a support portion 20 for supporting the channel 10, And a rotating means (30) for rotating the pipe (10).

The pipeline (10) is located in the water, extending from the offshore facility or ship or marine structure to the ocean. The pipeline 10 can be extended to the ocean by connecting a plurality of pipes. Examples of the pipeline (10) include a deep sea water intake pipe, a temperature difference power generation and water intake pipe for cooling and heating, and a water intake pipe for use of seawater in a farm, a limb, or a sushi bar.

A channel is formed in the channel 10 so that seawater can flow. The conduit 10 is made of a synthetic resin or a corrosion-resistant metal material.

The supporting portion 20 is provided outside the conduit 10 to support the conduit 10. Particularly, in the present invention, since the pipeline 10 is rotated by the rotating means, the supporting portion 20 has a structure capable of supporting the rotating pipeline 10.

The support portion 20 includes a cylindrical housing 21 for rotatably supporting the duct 10 and a fixing member 22 for fixing the housing 21 to a structure or seabed.

The cylindrical housing 21 has a hollow structure with left and right openings and an empty interior. The conduit 10 is inserted into one open side of the housing and extends to the other open side. Therefore, the cylindrical housing 21 is installed so as to surround the outside of the pipeline. The housing 21 can be constructed by coupling two semi-cylindrical covers.

The inner diameter of the housing (21) is formed to be larger than the outer diameter of the duct (10). A bearing (15) is provided between the housing (21) and the duct (10). A plurality of the housings 21 may be installed along the duct 10 at regular intervals.

The fixing member 22 fixes the housing 21 to the structure or the seabed. For example, the fixing member 22 can fix the housing 21 to the sea floor or fix the housing to a vessel or a marine artificial structure.

The fixing member 22 may be composed of a support bar 23 provided at the lower part of the housing 21 and a fixing plate 25 formed at the lower part of the support bar 23. In this case, the fixing plate 25 is seated on the seabed surface, and the fixing plate 25 is fixed to the bottom surface in a usual manner.

The rotating means (30) rotates the pipeline (10) supported by the housing (21). The rotating means rotates the conduit (10) to change the speed or direction of the fluid in the conduit (10) to prevent the attachment of marine life to the inner wall of the conduit. A plurality of rotating means 30 may be installed along the pipeline 10 at regular intervals.

The illustrated rotating means includes a driven gear 31 formed on the outer periphery of the pipe 10, a drive gear 33 meshing with the driven gear 31, and a drive unit for rotating the drive gear 33 .

The driven gear 31 is formed in a ring shape along the outer circumferential direction of the conduit 10. The driven gear 31 is formed at a position not covered by the housing 21. [ Therefore, a driven gear 31 is installed in the duct 10 between the housing 21 and the housing. The drive gear 33 meshes with the driven gear 31 and transmits the rotational force to the driven gear 31. The drive gear 33 may be a spur gear.

The driving unit may be installed on the upper portion of the housing 21. [ A motor can be used as a driving unit. In this case, a geared motor can be used as a motor. The motor may be housed inside a case 37 provided on the upper portion of the housing. The rotary shaft 39 connected to the motor is axially coupled to the driving gear 33. [

Although not shown, the power supply unit for supplying power to the motor may include a power source and a cable connected to the power source to supply electricity to the motor. A commercial power supply or a battery can be used as the power source. In the case of commercial power, power is supplied to the motor via the control box installed on land or on offshore structures. In case of a battery, it can be installed inside the control box. The cable extends into the water and is electrically connected to the motor.

When power is applied to the motor through the above-described rotating means, the duct 10 rotates. When the conduit (10) is rotated, the flow velocity and direction of the fluid at the inner wall of the conduit and the fluid force are irregularly changed, so that attachment of marine organisms in the conduit can be prevented originally.

In order to further enhance the effect of preventing marine organisms from attaching, a rib (11) for turbulating the flow of the fluid may be formed on the inner wall of the channel (10).

3 and 4, the ribs 11 are formed in a straight line from one side of the channel to the other along the longitudinal direction of the channel 10. At least one or more than two ribs 11 are formed. In the illustrated example, four ribs 11 are formed spaced apart from the inner wall of the channel.

Further, as shown in Figs. 5 and 6, the ribs 11 may be spirally twisted. For example, the twist angle of the rib may be between 2 and 80 degrees.

The shape and protrusion height of the ribs 11 can be designed by determining theoretically according to the direction, speed, temperature and pressure of the seawater in the duct 10, and by estimating the optimal rotational speed according to the rotational direction.

By forming the ribs 11 protruding from the inner wall of the conduit 10 to which the fluid directly abuts, by generating a vortex flow around the inside of the conduit by the rotation of the conduit 10, the velocity and direction of the fluid are irregularly changed The effect of preventing the attachment of marine life can be further enhanced. In addition, the inlet side of the channel having a relatively high frequency of attachment of marine life improves the flow velocity and turbulence by changing the shape and size of the ribs, thereby properly preventing the attachment of marine life.

Meanwhile, the present invention may further include a controller for appropriately controlling the rotation direction and the rotation speed of the pipeline 10. The controller 10 adjusts the rotation direction and the rotation speed of the pipe according to at least one selected from the flow velocity, pressure and temperature inside the pipe.

Referring to FIG. 7, the controller includes a sensor unit installed inside the conduit, and a control unit 60 receiving signals output from the sensor unit and controlling the operation of the motor.

The sensor unit measures at least one selected from a flow velocity, a pressure, and a temperature inside the pipe. Therefore, at least one of the flow rate sensor 51, the pressure sensor 53, and the temperature sensor 55 or any one of them may be installed in the pipe.

The control unit 60 receives the signal output from the sensor unit, senses the flow velocity, pressure, and temperature inside the pipe, and controls the rotation direction and speed of the pipe by applying power to the pipe. The control unit 60 may be installed inside the control box installed on the land or sea structure. The control unit 60 has a typical structure comprising a microprocessor and various driving circuits. In this case, the control box may be provided with an input unit and an output unit.

The input unit is provided on the front surface of the control box so as to control driving and time setting of various devices. The input unit can be operated by various buttons or a touch screen method. The output unit is composed of a display installed on the front of the control box, and can display the information such as the flow rate, pressure, and temperature inside the pipe, and can display the rotation direction and speed of the pipe.

The measured values from the sensor unit are transmitted to the control unit, and the rotation direction and the rotation speed of the channel are calculated based on the measured values. The control unit determines the proper speed and direction of the pipeline and controls the operation of the motor by the command value to control the rotation of the pipeline.

The above-mentioned controller monitors the information of the flow rate, pressure, temperature and the like in the pipeline in real time and accordingly controls the proper rotation speed and rotation direction of the pipeline to prepare for the attachment environment of marine life. Cavitation occurs depending on the rotation speed of the pipe, so that local exhaustion or pitting of the pipe may occur. Therefore, it is desirable to find an optimum rotation speed by using a mathematical model.

The present invention prevents the attachment of marine organisms to the inside of the pipeline through a structure that rotates the pipeline. Therefore, it is possible to provide a method for preventing marine organisms from adhering to pipelines using the present invention. That is, the method of preventing the attachment of marine organisms to the sea water pipe can be implemented by rotating the channel installed in the water.

8 shows a rotary sea water pipe according to another embodiment of the present invention.

When a plurality of conduits are connected and extended, two conduits (70) and (75) are connected within a single housing (80).

One of the conduits 70 is inserted into one opened side of the housing 80 and one of the conduits 75 is inserted into the other side of the opened side of the housing 80. For convenience of explanation, one of the two conduits is referred to as a first conduit 70, and the other conduit is referred to as a second conduit 75. [ The housing to which the two conduits 70 and 75 are connected is referred to as a first housing 80 and the housings located on the right and left sides of the first housing are referred to as a second housing 83 and a third housing 85.

The rotating means 30 may include a plurality of rotatable means to independently rotate the first and second conduits 70 and 75. For example, the ring gear 31 is formed in the first conduit 70 and the first conduit 70 is rotated using a motor provided on the upper portion of the second housing 83. A ring gear 31 is also formed in the second conduit 75 and the second conduit 75 is rotated using a motor provided on the upper portion of the third housing 85.

In this case, the rotation speed and direction of the first channel and the second channel can be appropriately controlled through the controller described above.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, and that various modifications and equivalent embodiments may be made by those skilled in the art. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

10: conduit 20: support
21: housing 30: rotating means
31: driven gear 33: drive gear

Claims (8)

A conduit extending from an onshore facility or an offshore facility to the ocean to receive seawater and located in the water and having a channel formed therein to allow the seawater to flow;
A supporter installed outside the pipeline and fixed to the seabed and supporting the pipeline;
And rotating means for rotating the pipe to change the speed or direction of the fluid inside the pipe to prevent marine organisms from adhering to the inner wall of the pipe,
Wherein the support portion comprises a hollow cylindrical housing having a hollow structure in which the pipe is allowed to pass therethrough and supports the pipe in a rotatable manner and a fixing member for fixing the housing to the sea floor,
Wherein the rotating means includes a driven gear formed on an outer periphery of the pipe, a driving gear engaged with the driven gear, and a driving unit installed on the housing for rotating the driving gear. Rotating seawater intake pipe for. delete delete The rotary sea water intake pipe according to claim 1, wherein a rib for protruding a flow of the fluid is protruded from the inner wall of the channel. The rotary sea water intake pipe as set forth in claim 4, wherein the ribs are elongated from one side of the channel to the other side. [6] The rotary sea water intake pipe as set forth in claim 5, wherein the ribs are spirally formed in an irregular manner. The apparatus according to claim 1, further comprising a controller for adjusting a rotation direction and a rotation speed of the channel according to at least one selected from a flow velocity, a pressure, and a temperature inside the channel. Rotating seawater intake pipe for. The apparatus according to claim 7, wherein the controller comprises: a sensor unit installed in the pipe to measure at least one selected from a flow velocity, a pressure, and a temperature; And a controller for controlling the operation of the rotary water tank.

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