JP5159223B2 - Biological adhesion prevention device for seawater level measuring device - Google Patents

Description

  The present invention relates to a technique for measuring the water level of seawater, and more particularly, to a biofouling prevention apparatus for a seawater water level measuring apparatus that prevents marine organisms from adhering to a waveguide in contact with seawater.

  As a method for measuring the seawater level, for example, there is a purge type liquid level measurement method in which piping is inserted into seawater and compressed air is flowed to detect a back pressure that varies depending on the water level. In this purge type liquid level measurement method, since the purge pipe is immersed in seawater for a long period of time, marine organisms adhere to the pipe and hinder measurement. Therefore, an ultrasonic level meter that does not require this purge pipe has been introduced.

  The method of measuring the seawater level with this ultrasonic level meter is suitable for measuring the seawater level in a wide area where there are no structures that cause measurement failure due to undesired reflected waves. In the measurement of a narrow part where a structure is complicated, a waveguide is introduced. Generally, it is applied to the air before reaching the water surface. When the measured water level is deep, a waveguide reaching the seawater is required. However, marine organisms adhere to the inner and outer surfaces of the pipe near the sea surface by immersing the waveguide in sea water. Since marine organisms grown on the inner surface of the waveguide generate reflected waves other than the sea surface, which is the measurement surface, accurate measurement may not be continued.

  As shown in the cross-sectional view of FIG. 14, the inventor of the present invention continuously injects a small amount of chlorine water into the cylindrical waveguide 1 containing the ultrasonic level meter 2, that is, an environmental load. Thus, attention was paid to the fact that marine organisms near the sea surface on the inner surface side of the waveguide 1 can be prevented from adhering.

For a technique related to the prevention of adhesion of marine organisms that inhabit and grow at the interface of such a structure in contact with seawater and generate various troubles, see, for example, Japanese Patent Application Laid-Open No. 11-303041 “Structure in contact with seawater” As shown in `` Anti-fouling method '', a titanium sprayed coating is applied to the wetted surface of a concrete structure in contact with seawater, or the wetted surface of the concrete structure is covered with a plate-like or thin plate-like titanium material, Cobalt or manganese-containing solution or a solution in which iridium is mixed with these solutions is applied to the film, transformed to cobalt oxide or manganese oxide film by thermal activation treatment, and then the sprayed film or titanium material is connected to the positive electrode of the DC power source. A method has been proposed in which the anode is kept within the oxygen generation potential and the base electrode is energized at a base potential by the chlorine water generation limit potential. .
Japanese Patent Laid-Open No. 11-303041

However, as described above, in the method of injecting chlorine water from the inlet 4 into the cylindrical waveguide 1 as shown in FIG. One side of the inner wall of the tube 1 has an effect of preventing adhesion of marine organisms, but the inner wall of the waveguide 1 on the opposite side (right side in the illustrated example) has a problem that the effect of preventing adhesion is low.
If a large amount of chlorine water is injected, the effect of preventing adhesion is enhanced, but there is a problem that environmental pollution in the public water area and the like at the outlet becomes larger.

  Patent Document 1 “Anti-fouling method for structures in contact with seawater” electrically prevents the inhabiting of marine organisms, and is not suitable for measurement using an ultrasonic level meter in this energized state. Had a problem.

  The present invention has been developed to solve such problems. That is, the object of the present invention is to uniformly inject chlorine water into the waveguide, thereby preventing marine organisms from adhering to the waveguide, and without contaminating seawater with a small amount of chlorine water. An object of the present invention is to provide a biological adhesion prevention device for a seawater level measuring device capable of enhancing the effect of preventing the adhesion of living organisms.

The adhesion preventing device of the present invention is provided in the waveguide (1), an ultrasonic level meter (2) for measuring the level of seawater, which is disposed downward in the cylindrical waveguide (1). An opening is formed in the waveguide (1) so as to face the outer peripheral surface of the ring-shaped inner tube (3) having an outer diameter smaller than the inner diameter of the waveguide (1) and the inner tube (3). A chlorine water injection port (4) provided and an injection pipe (5) connected to deliver chlorine water to the chlorine water injection port (4) are provided.

  For example, the inner pipe (3) includes a wire mesh formed in a belt shape, a groove (7) formed in a lattice shape on the outer peripheral surface of the cylindrical material (6), or a cylindrical material (6) as the chlorine water inlet ( 4) What formed so that it may incline below from the part to the opposing part can be used.

An ultrasonic level meter (2) for measuring the level of seawater, which is disposed downward in the cylindrical waveguide (1), and a plurality of chlorine water inlets (with openings in the waveguide (1)) 4), an injection conduit (8) attached to be wound around the waveguide (1) in order to inject chlorine water into each chlorine water injection port (4), and the injection conduit (8) It may be provided with a connected tube (9) for injecting chlorine water.

Alternatively, an ultrasonic level meter (2) for measuring the water level of seawater, which is disposed downward in the cylindrical waveguide (1), and a plurality of chlorine water injections provided with openings in the waveguide (1). It is also possible to provide an inlet (4) and a tube (9) for injecting chlorine water connected to each chlorine water inlet (4).

  Also, an ultrasonic level meter (2) for measuring the water level of seawater, which is disposed downward in the cylindrical waveguide (1), and a chlorine water inlet (in which an opening is provided in the waveguide (1)) ( 4), a diffusion plate (10) provided in the vicinity of the chlorine water injection port (4) so as to block the flow of chlorine water injected from the chlorine water injection port (4), and the diffusion plate (10 ) And a filter (11) attached so as to wrap around the inner wall surface of the waveguide (1).

  In the apparatus having the above configuration, the ring-shaped inner pipe (3) having an outer diameter smaller than the inner diameter of the waveguide (1) is provided in the waveguide (1). By injecting from (4) toward the outer peripheral surface of the inner tube (3), chlorine water can be uniformly injected into the inner wall surface of the waveguide (1). Since this chlorine water is dripped evenly on the inner wall surface of the waveguide (1), adhesion of marine organisms can be reliably prevented. Therefore, since the uneven shape does not occur on the inner wall surface of the waveguide (1), the fluctuation of the seawater surface in the tube of the waveguide (1) can be reduced, and stable ultrasonic level measurement becomes possible.

In addition, even if the structure has a structure in which a small amount of chlorine water is continuously injected into the waveguide (1) instead of the inner tube (3), it is marine near the sea surface on the inner surface side of the waveguide (1). It can prevent organisms from attaching. Therefore, it is possible to reduce the fluctuation of the seawater surface in the pipe of the waveguide (1), and it is possible to perform stable ultrasonic level measurement by the ultrasonic level meter (2).
Since chlorine water can be uniformly injected into the waveguide (1), the adhesion preventing effect can be enhanced with a small amount of chlorine water, and seawater is not contaminated.

  In the seawater level measuring device according to the present invention, an ultrasonic wave level meter is disposed downward in a cylindrical waveguide in contact with seawater, and a ring-shaped inner tube is provided in the waveguide. The chlorine water injected toward the pipe is prevented from dripping uniformly onto the inner wall surface of the waveguide and adhering marine organisms.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front sectional view showing a biological adhesion prevention device of a seawater level measuring device according to a first embodiment. FIG. 2 is an enlarged plan cross-sectional view of the biofouling prevention device of the seawater level measuring device of the first embodiment.
The biofouling prevention apparatus of the seawater level measuring apparatus according to the first embodiment has an ultrasonic level meter 2 disposed downward in a cylindrical waveguide 1 in contact with seawater, and a ring-shaped inner pipe in the waveguide 1. 3, and a chlorine water inlet 4 is provided so as to open toward the outer peripheral surface of the inner tube 3.

  The waveguide 1 is made of, for example, a cylindrical member made of vinyl chloride having an inner diameter of about 30 cm, and has a total length such that the lowest seawater level to be measured in consideration of tides is the lower part. In the illustrated example of FIG. 1, the intermediate position of the waveguide 1 is the seawater level, and the upper position thereof indicates the ground level. An ultrasonic level meter 2 such as a sonic pulse generator is disposed above the waveguide 1. The ultrasonic pulse generated from the ultrasonic level meter 2 is propagated along the waveguide 1, and the time until the moment it reaches the ultrasonic transducer after being reflected by the sea surface is measured. The distance to (seawater level), that is, the water level is measured.

  In the waveguide 1 of the present invention, an inner tube 3 is provided at a position slightly above the position where the ultrasonic level meter 2 is disposed. The inner tube 3 is a ring-shaped member having an outer diameter smaller than the inner diameter of the waveguide 1. In the waveguide 1, a chlorine water injection port 4 is provided so as to open toward the outer peripheral surface of the inner tube 3, and an injection tube 5 for sending chlorine water is connected to the chlorine water injection port 4.

As shown in FIGS. 1 and 2, the inner tube 3 of the first embodiment is obtained by winding a wire mesh in a belt shape. The inner pipe 3 made of this metal mesh is intended to allow the chlorine water injected from the chlorine water inlet 4 to easily permeate, and to move the chlorine water to the position opposite to the chlorine water inlet 4 without dropping. In this way, the chlorine water is uniformly distributed over the gap between the outer periphery of the circular inner tube 3 and the inner peripheral surface of the waveguide 1, so that the injected chlorine water is uniformly dripped onto the inner wall surface of the waveguide 1. be able to. As a result, marine organisms can be prevented from adhering to the inner wall surface of the waveguide 1.
The inner tube 3 is not limited to a belt-shaped wire mesh, but is not shown in the figure, but a member in which a large number of holes are formed in a belt-shaped plate material or a member in which a large number of protrusions are formed in a belt-shaped plate material is used. Can do.

FIG. 3 is a front cross-sectional view showing the biofouling prevention apparatus according to the second embodiment. FIG. 4 is an enlarged front view of the inner pipe of the second embodiment. FIG. 5 is a partially enlarged plan sectional view of the biofouling prevention apparatus according to the second embodiment.
As shown in FIGS. 3 and 4, the inner tube 3 of the biofouling prevention apparatus according to the second embodiment has grooves 7 formed in a lattice shape on the outer peripheral surface of the cylindrical member 6, and the cylindrical member 6 is connected to the chlorine water inlet 4. It formed in the state inclined downward from the part to the opposing part. By adopting a structure in which the inner pipe 3 is inclined as described above, the chlorine water injected from the chlorine water inlet 4 can be reliably moved to the position opposite to the chlorine water inlet 4. Further, the chlorine water can be dripped down uniformly on the inner wall surface of the waveguide 1 by propagating the groove 7 to the outer peripheral surface of the inner tube 3.
Note that the structure in which the inner pipe 3 is disposed in an inclined manner is not limited to the structure in which the grooves 7 are formed in a lattice shape, and a member in which a large number of holes are formed in a wire net or a plate as described above, or a large number in a plate. Of course, it is also possible to use for the member in which the protrusion was formed.

FIG. 6 is a cross-sectional plan view schematically showing the biofouling prevention apparatus of Example 3. FIG. 7 is a partial front view of the biofouling prevention device according to the third embodiment. FIG. 8 is a partially enlarged front sectional view of the biofouling prevention device according to the third embodiment.
In the biofouling prevention apparatus according to the third embodiment, the waveguide 1 is provided with a plurality of openings of the chlorine water inlet 4 in the waveguide 1, and an injection conduit 8 is provided around the waveguide 1 so as to communicate with each chlorine water inlet 4. A tube 9 was connected to the injection conduit 8. In this way, by dropping chlorine water from each chlorine water inlet 4 via the injection conduit 8, the chlorine water can be uniformly dropped on the inner wall surface of the waveguide 1.

FIG. 9 is a plan cross-sectional view schematically showing the biofouling prevention apparatus of Example 4. FIG. 10 is a partial front view of the biofouling prevention device according to the fourth embodiment. FIG. 11 is a partially enlarged front sectional view of the biofouling prevention apparatus according to the fourth embodiment.
In the biofouling prevention apparatus of Example 4, a plurality of openings of chlorine water injection ports 4 were provided in the waveguide 1 and tubes 9 for injecting chlorine water were connected to the respective chlorine water injection ports 4. In this way, chlorine water is dripped from each chlorine water inlet 4 through a bundle of tubes 9, so that the chlorine water is prevented from dripping inadvertently and dripped uniformly on the inner wall surface of the waveguide 1. Become.

  In particular, in the biological adhesion prevention apparatus of Example 3 or 4, the chlorine water injection port 4 is opened in the tangential direction of the circular waveguide 1 in plan view, so that chlorine water is injected from the chlorine water injection port 4. Then, this chlorine water drops in a spiral shape so as to travel along the inner wall surface of the waveguide 1. As a result, the injected chlorine water can be dripped uniformly onto the inner wall surface of the waveguide 1, and adhesion of marine organisms to the inner wall surface of the waveguide 1 can be reliably prevented.

FIG. 12 is a perspective view schematically showing a biofouling prevention apparatus of Example 5. FIG. 13 is a partially enlarged plan sectional view of the fifth embodiment.
In the biofouling prevention apparatus of the fifth embodiment, a diffusion plate 10 is provided in the vicinity of the chlorine water injection port 4 so as to block the flow of chlorine water injected from the chlorine water injection port 4, and the periphery of the diffusion plate 10 and the waveguide A filter 11 was attached so as to wrap the diffuser plate 10 over the inner wall surface of 1. Since the biofouling prevention apparatus according to the fourth embodiment has a simple structure in which the diffusion plate 10 is provided in the waveguide 1, it can be easily incorporated into the existing waveguide 1.

  The present invention prevents the marine organisms from adhering to the waveguide 1 by uniformly injecting chlorine water into the waveguide 1 and does not contaminate seawater with a small amount of chlorine water. Of course, as long as the effect of preventing the attachment of living organisms can be enhanced, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.

  The biological adhesion preventing apparatus of the seawater level measuring apparatus of the present invention can be used for measuring the seawater level in public water areas.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front sectional view showing a biological adhesion prevention device of a seawater level measuring device according to a first embodiment. It is an expanded plane sectional view of the biological adhesion prevention apparatus of the seawater level measuring apparatus of Example 1. It is a front sectional view showing a biological adhesion prevention device of Example 2. It is an enlarged front view of the middle pipe of Example 2. It is the elements on larger scale of the biological adhesion prevention apparatus of Example 2. It is a plane sectional view showing typically the living body adhesion prevention device of Example 3. It is a partial front view of the biofouling prevention apparatus of Example 3. It is a partial expansion front sectional view of the organism adhesion prevention device of Example 3. It is a plane sectional view showing typically the living thing adhesion prevention device of Example 4. It is a partial front view of the biofouling prevention apparatus of Example 4. It is a partial expansion front sectional view of the biological adhesion prevention apparatus of Example 4. It is a perspective view which shows typically the biological adhesion prevention apparatus of Example 5. FIG. 10 is a partially enlarged plan sectional view of Example 5. FIG. It is a front sectional view showing a biological adhesion prevention device of a conventional seawater level measuring device.

DESCRIPTION OF SYMBOLS 1 Waveguide 2 Ultrasonic level meter 3 Inner tube 4 Chlorine water injection port 5 Injection tube 6 Tubular material 7 Groove 8 Injection conduit 9 Tube 10 Diffusion plate 11 Filter

Claims (7)

An ultrasonic level meter (2) for measuring the level of seawater, which is disposed downward in the cylindrical waveguide (1);
A ring-shaped inner tube (3) provided in the waveguide (1) and having an outer diameter smaller than the inner diameter of the waveguide (1);
A chlorine water inlet (4) provided with an opening in the waveguide (1) so as to face the outer peripheral surface of the inner tube (3);
A biofouling prevention apparatus for a seawater level measuring apparatus, comprising: an injection pipe (5) connected to deliver chlorine water to the chlorine water inlet (4). The bio-adhesion prevention device of the seawater level measuring device according to claim 1 , wherein the inner pipe (3) is a wire net formed in a belt shape. The bio-adhesion prevention device of the seawater level measuring device according to claim 1 , wherein the inner pipe (3) is configured such that grooves (7) are formed in a lattice shape on the outer peripheral surface of the cylindrical member (6). The sea water according to claim 3 , wherein the inner pipe (3) is formed by inclining a cylindrical member (6) downward from the chlorine water inlet (4) portion to the opposite portion thereof. Biological adhesion prevention device for water level measuring device. An ultrasonic level meter (2) for measuring the level of seawater, which is disposed downward in the cylindrical waveguide (1);
A plurality of chlorine water inlets (4) having openings in the waveguide (1);
An injection conduit (8) attached to wrap around the waveguide (1) to inject chlorine water into each chlorine water inlet (4);
A biological adhesion prevention device for a seawater level measuring device, comprising: a tube (9) for injecting chlorine water connected to the injection conduit (8). An ultrasonic level meter (2) for measuring the level of seawater, which is disposed downward in the cylindrical waveguide (1);
A plurality of chlorine water inlets (4) having openings in the waveguide (1);
A biological adhesion preventing device for a seawater level measuring device, comprising: a tube (9) for injecting chlorine water connected to each chlorine water inlet (4). An ultrasonic level meter (2) for measuring the level of seawater, which is disposed downward in the cylindrical waveguide (1);
A chlorine water inlet (4) having an opening in the waveguide (1);
A diffusion plate (10) provided in the vicinity of the chlorine water inlet (4) so as to block the flow of chlorine water injected from the chlorine water inlet (4);
A biological adhesion of a seawater level measuring device, comprising: a peripheral edge of the diffusion plate (10); and a filter (11) attached so as to wrap around the inner wall surface of the waveguide (1). Prevention device.

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