JP4825865B2 - Antifouling cover and water flow detection device - Google Patents

Description

  The present invention relates to an antifouling cover for a water flow detection sensor that detects a water flow such as a flow rate sensor and a flow rate sensor installed in water, and a water flow detection device including the antifouling cover.

  For long-term use in seawater, for example, fishery stationary nets, fishery materials such as fishery nets, marine materials such as navigation buoys, light buoys, mooring buoys, and anti-pollution membranes There are materials for civil engineering. And since these materials exist in seawater for a long time, aquatic organisms such as blue seaweed, sea anemone, blue mussel and barnacles adhere to the surface. When aquatic organisms adhere to these materials, there is a problem that the original functions of the materials cannot be fully exhibited.

Patent Document 1 below discloses a structure having an effect of preventing adhesion of aquatic organisms over a long period of time as an invention for solving such a problem. The structure having the effect of preventing the adhesion of aquatic organisms is a resin coating in which a thermoplastic resin containing a bis (2-pyridinethiol-1-oxide) metal salt (antifouling agent) and an elution amount controlling substance is coated. A structure composed of yarn, and the amount of antifouling agent dissolved in seawater is controlled to 30 mg / cm cubic or less at 25 ° C. and 3 mg / cm cubic or more at 15 ° C. The amount of water is 1 cc / cm square · sec or more.
JP 2001-89577 A

  By the way, in the said prior art, a structure (antifouling structure) is comprised with the resin-coated thread | coated with the thermoplastic resin containing a bis (2-pyridine thiol-1-oxide) metal salt (antifouling agent). By using this antifouling structure to be used in water, aquatic organisms are prevented from adhering. However, there are water flow detection sensors such as a flow rate sensor and a flow rate sensor that detect a water flow, which are used in water. More specifically, there is an electromagnetic log that detects the ship speed based on the flow velocity. In these sensors, since the flow velocity and the flow rate are detected by the water flow passing through the surface, a slight disturbance of the water flow on the surface of the sensor has a great adverse effect on the accuracy of the detection result. Therefore, in these water flow detection sensors, it is not preferable that an antifouling structure is present around the surface when the water flow is generated, that is, when a water flow is generated.

  The present invention has been made in view of the above-described circumstances, and since aquatic organisms and the like adhere at the time of berthing, the surface of the sensor is covered by covering the surface of the sensor at the time of berthing (when the water flow detection sensor is not used). It is an object of the present invention to provide an antifouling cover and a water flow detection device that can prevent adhesion of aquatic organisms and garbage.

  In order to achieve the above object, in the present invention, as a first solution means for the antifouling cover, there is an antifouling cover for a water flow detection sensor for detecting a water flow with a tip of the water, the tip of the water flow detection sensor. A cover portion that covers the cover portion, and one end portion that is attached to the water flow detection sensor so as to be rotatable, and the other end portion includes a support that supports the cover portion. When pressed, the cover portion rotates in a direction pressed about the axis of the support tool to thereby cover the surface of the front end portion of the water flow detection sensor from a first position to a second position. When the surface of the tip of the water flow detection sensor is exposed by moving the cover to the second position and the water flow stops, the cover is moved from the second position by its own weight. First To adopt a means of returning to the position.

  In the present invention, as the second solving means relating to the antifouling cover, in the first solving means, the support tool includes an elastic body, and the support tool includes the weight of the cover portion and the elastic body. The cover portion is fixed to the first position by elasticity, and when the cover portion is pressed by a water flow, the cover portion rotates in a direction to be pressed around the axis of the support tool. When the surface of the front end portion of the water flow detection sensor is exposed by moving from the first position to the second position and the cover portion moves to the second position, and the water flow stops, the cover portion is A means for returning from the second position to the first position by its own weight and the elasticity of the elastic body of the support is adopted.

  In the present invention, as the third solution means related to the antifouling cover, in the first or second solution means, the cover portion is provided with a fin provided on the side pressed by the water flow. To do.

  Further, in the present invention, as a first solution means related to the water flow detection device, a water flow detection sensor that detects a water flow with a tip in water and an antifouling cover that employs any of the first to third solution means. The surface of the water flow detection sensor on the side in contact with the cover portion is formed in a convex shape of an arc, and the surface of the cover in contact with the tip of the water flow detection sensor is formed on the water flow detection sensor. A means of adopting a circular arc concave shape so as to engage with the circular arc convex shape of the tip of the detection sensor is employed.

  According to the present invention, the antifouling cover includes a cover part and a support, and when the cover part is pressed by a water flow, the cover part rotates in a direction pressed about the axis of the support tool. As a result, the surface of the tip of the water flow detection sensor is moved from the position covering the surface of the tip of the water flow detection sensor (first position) to the second position, and the surface of the tip of the water flow detection sensor is exposed by moving the cover to the second position. When the water flow stops, the cover portion returns from the second position to the first position by its own weight.

  In this way, the antifouling cover exposes the surface of the tip of the water flow detection sensor to detect the water flow when the water flow is generated, and detects the water flow when the water flow is stopped. Since it is not necessary, the surface of the tip of the water flow detection sensor is covered. As a result, when the water flow detection sensor is not used, the tip of the water flow detection sensor is covered so that aquatic organisms such as sea anemone, blue mussel and barnacles and dust adhere to the surface of the water flow detection sensor. Can be prevented.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The present embodiment relates to an antifouling cover that prevents adhesion of aquatic organisms on the surface of a water flow detection sensor that detects a water flow such as a flow rate sensor and a flow rate sensor installed in water.
[First Embodiment]
First, the first embodiment will be described. FIG. 1 is a diagram showing an external configuration of an antifouling cover A1 according to the first embodiment. FIG. 1A is a diagram showing an external configuration on the front side of the antifouling cover A1, and FIG. 1B is a perspective view showing an external configuration on the left side of the antifouling cover A1.
The external configuration of the antifouling cover A1 will be described with reference to FIG.

  The antifouling cover A1 prevents aquatic organisms such as sea anemone, blue mussels and barnacles and dust from adhering to the electromagnetic log B that is attached so that its tip protrudes from the ship bottom into the water. The electromagnetic log B is a sensor that is attached so that its tip protrudes from the bottom of the ship into the water as described above, detects the speed of the attached ship, generates a magnetic field in the water by an electromagnet, The electromotive force generated in the water (conductor) due to the movement of water in the magnetic field due to the movement of is detected as a speed signal having a magnitude proportional to the relative speed between the ship and the water. The electromagnetic log B has a substantially cylindrical shape and a diameter of about 35 mm or 70 mm.

And the antifouling cover A1 is comprised from the cover part 1 and the support tool 2, as shown in FIG.
The cover part 1 is an antifouling member that prevents aquatic organisms such as sea anemone, blue mussels and barnacles and dirt from adhering to the surface of the tip of the electromagnetic log B protruding into the water from the bottom of the ship. The cover portion 1 is made of a synthetic resin and has a substantially cylindrical shape identical to that of the electromagnetic log B in order to cover the tip portion of the electromagnetic log B. Moreover, as shown in FIG. 1, the surface on the side in contact with the cover 1 at the tip of the electromagnetic log B is formed in a convex shape of an arc. The surface of the cover portion 1 on the side in contact with the tip of the electromagnetic log B is formed into a circular concave shape in order to engage with the circular concave shape of the electromagnetic log B.

  As shown in FIG. 1, the support 2 is composed of a pair of support tools, and is attached to the left and right sides of the tip of the electromagnetic log B so that one end is rotatable by a shaft. Yes. And the support tool 2 supports the cover part 1 rotatably with a shaft so that the other end part is sandwiched from both the left and right sides. Further, the support 2 includes a spring, and the cover portion is positioned so as to cover the tip portion of the electromagnetic log B shown in FIGS. 1A and 1B by the weight of the cover portion 1 and the elasticity of the spring. 1 is fixed.

  Next, the operation of the antifouling cover A1 will be described with reference to FIG. FIG. 2 is a schematic left side view showing the operation of the antifouling cover A1 according to the first embodiment. 2A is a schematic diagram on the left side showing the antifouling cover A1 before operating, and FIG. 2B is a schematic diagram on the left side showing the operating antifouling cover A1. is there.

In the antifouling cover A1, when there is no water flow in the water under the bottom of the ship due to the berth of the ship, the cover part 1 is positioned so as to cover the tip of the electromagnetic log B as shown in FIG. It is fixed by its own weight and the elasticity of the spring of the support 2.
And when a ship starts sailing, in the antifouling cover A1, when the water flow shown by the thick arrow of (b) of Drawing 2 arises in the water under a ship bottom by the ship starting sailing, by the water flow concerned The cover portion 1 is pressed, and the cover portion 1 moves from the position shown in FIG. 2A to the position shown in FIG. 2B by rotating in the direction pressed about the axis of the support. To do. Thereby, since the surface of the front-end | tip part of the electromagnetic log B is exposed, the electromagnetic log B starts the detection of the speed of a ship based on the flow velocity of a water flow.

And when a ship stops navigation, in the antifouling cover A1, if the water flow which has arisen in the water under a ship bottom by the stop of a ship stops, the cover part 1 will become the elasticity of the elastic body of the self-weight and the said support tool. Thus, the position shown in FIG. 2B is returned to the position shown in FIG. Thereby, the surface of the front-end | tip part of the electromagnetic log B is covered with the cover part 1. FIG.
In the antifouling cover A1, as described above, the cover portion 1 was moved to the position shown in FIG. 2B by the water flow shown in FIG. 2B, but a reverse water flow was generated. In this case, the cover portion 1 is moved to a position opposite to the position shown in FIG.

As described above, the antifouling cover A1 according to the first embodiment is attached to the electromagnetic log B so that the cover portion 1 that covers the surface of the tip portion of the electromagnetic log B and the one end thereof are rotatable by the shaft. And a pair of supports 2 that support the other end so as to sandwich the cover portion 1. And when a ship starts navigation, in antifouling cover A1, cover part 1 is pressed by the water flow which arises in the water under a ship's bottom, and cover part 1 is from the position shown in (a) of Drawing 2 by the press. It moves to the position shown in FIG. Thereby, since the surface of the front-end | tip part of the electromagnetic log B is exposed, the electromagnetic log B starts the detection of the speed of a ship based on the flow velocity of a water flow.
In addition, when the ship stops navigation, in the antifouling cover A1, when the water flow generated in the water under the bottom of the ship stops, the cover unit 1 is caused by its own weight and the elasticity of the elastic body of the support, as shown in FIG. The position returns to the position shown in FIG. 2A from the position shown in FIG. Thereby, the surface of the front-end | tip part of the electromagnetic log B is covered with the cover part 1. FIG.

  As described above, the antifouling cover A1 exposes the surface of the tip of the electromagnetic log B and stops the water flow in order to detect the speed of the vessel when the water flow is generated, that is, when the vessel is navigating. That is, when the ship is anchored, the surface of the tip of the electromagnetic log B is covered with the cover part 1 because it is not necessary to detect the speed of the ship. Thereby, when the electromagnetic log B is not used, the surface of the tip of the electromagnetic log B is covered, so that aquatic organisms such as sea anemone, blue mussel and barnacle and dust adhere to the surface of the tip of the electromagnetic log B. Can be prevented.

  Further, the surface of the cover portion 1 on the side in contact with the front end portion of the electromagnetic log B is formed in a concave shape of an arc so as to engage with the convex shape of the arc of the front end portion of the electromagnetic log B. Thereby, the cover part 1 moves smoothly from the position shown to (a) of FIG. 2 to the position shown to (b) of FIG. 2 by the press of a water flow. Similarly, the cover unit 1 can smoothly return from the position shown in FIG. 2B to the position shown in FIG.

[Second Embodiment]
Next, a second embodiment will be described. FIG. 3 is a diagram showing an external configuration of the antifouling cover A2 according to the second embodiment. FIG. 3A is a diagram showing an external configuration on the front side of the antifouling cover A2, and FIG. 3B is a perspective view showing an external configuration on the left side of the antifouling cover A2.
The external configuration of the antifouling cover A2 will be described with reference to FIG.
As shown in FIG. 3, the antifouling cover A <b> 2 includes a cover portion 1 and a support tool 2.

  The cover part 1 is an antifouling member that prevents aquatic organisms and dust from adhering as in the first embodiment. The cover portion 1 is also made of synthetic resin, and has the same substantially cylindrical shape as the electromagnetic log B in order to cover the tip portion of the electromagnetic log B. As shown in FIG. 3, the surface of the electromagnetic log B on the side in contact with the cover portion 1 is formed into a convex shape of an arc. And the surface of the cover part 1 on the side in contact with the tip of the electromagnetic log B is shaped into an arcuate concave shape to engage with the arcuate concave shape of the electromagnetic log B, as in the first embodiment. .

  Further, the cover portion 1 includes a pair of fins 1a in the vicinity of the edge portion of the bottom surface. The fin 1a is provided so that the cover portion 1 can be more easily subjected to the pressure of the water flow. For this reason, the fin 1a is disposed in front of the cover portion 1 that receives the water flow when the ship is moving forward (in the bow direction). It is provided in the back (stern direction) of the cover part 1 which receives a water flow when the ship is moving backward.

FIG. 4 is a schematic left side view showing the operation of the antifouling cover A2 according to the second embodiment. 4A is a schematic diagram on the left side showing the antifouling cover A2 before operating, and FIG. 4B is a schematic diagram on the left side showing the operating antifouling cover A2. is there.
As in the first embodiment, when the ship starts to sail, the antifouling cover A2 is pressed by the water flow generated in the water below the bottom of the ship, and the cover portion 1 is shown in FIG. It moves from the position shown in FIG. 4A to the position shown in FIG. And in that case, in the antifouling cover A, since the cover part 1 is provided with the fin 1a, even if it is a slight water flow at the time of the navigation start of a ship, the cover part 1 is shown in FIG. Can be moved to the position shown in FIG.

Similarly to the first embodiment, when the ship stops navigation, in the antifouling cover A2, when the water flow that has occurred in the water under the bottom of the ship stops, the cover unit 1 is free from its own weight and the above-mentioned support tool. Due to the elasticity of the elastic body, the position shown in FIG. 4B returns to the position shown in FIG.
In the antifouling cover A2, as described above, the cover portion 1 was moved to the position shown in FIG. 4B by the water flow shown in FIG. 4B, but a reverse water flow was generated. In that case, the cover part 1 moves to a position opposite to the position shown in FIG. 4B by the pressing of the water flow.

As described above, in the antifouling cover A2 according to the second embodiment, the cover portion 1 that covers the surface of the front end portion of the electromagnetic log B and the one end of the antifouling cover A2 can be freely rotated by the shaft. And a pair of supporting tools 2 that are attached to the electromagnetic log B and that support the other end so as to sandwich the cover portion 1.
Thereby, the antifouling cover A2 exposes the surface of the tip portion of the electromagnetic log B and stops the water flow in order to detect the speed of the vessel when the water flow is generated, that is, when the vessel is navigating. That is, when the ship is anchored, it is not necessary to detect the speed of the ship. In this way, when the electromagnetic log B is not used, the surface of the tip portion of the electromagnetic log B is covered, so that aquatic organisms such as sea anemone, blue mussel and barnacle and dust adhere to the surface of the tip portion of the electromagnetic log B. Can be prevented.

  Further, in the antifouling cover A2, the cover portion 1 includes a pair of fins 1a. Thereby, even if it is the slight water flow at the time of the navigation start of a ship, the cover part 1 can move to the position shown to (b) of FIG. 4 from the position of (a) of FIG.

As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, For example, the following modifications can be considered.
(1) In the antifouling cover A1 and the antifouling cover A2 of the above-described embodiment, the support 2 has a spring, and the cover 1 is fixed to a position that covers the surface of the tip of the electromagnetic log B by the elasticity of the spring. However, the present invention is not limited to this.
For example, elastic rubber may be employed instead of the spring.

(2) In the antifouling cover A2 of the above embodiment, the fin 1a is provided in the vicinity of the edge portion of the bottom surface of the cover portion 1, but the present invention is not limited to this.
For example, you may make it provide the fin 1a in the center part vicinity of the bottom face away from the edge part of the bottom face of the cover part 1. FIG.

It is a figure which shows the external appearance structure of antifouling cover A1 which concerns on 1st Embodiment of this invention. It is a schematic diagram by the side of the left side which shows operation | movement of the antifouling cover A1 which concerns on 1st Embodiment of this invention. It is a figure which shows the external appearance structure of antifouling cover A2 which concerns on 2nd Embodiment of this invention. It is a schematic diagram by the side of the left side which shows operation | movement of the antifouling cover A2 which concerns on 2nd Embodiment of this invention.

Explanation of symbols

A1, A2 ... Antifouling cover, B ... Electromagnetic log, 1 ... Cover part, 2 ... Support

Claims (4)

An antifouling cover for a water flow detection sensor that detects a water flow with a tip in water,
A cover that covers the tip of the water flow detection sensor;
One end is attached to the water flow detection sensor so as to be rotatable, and the other end includes a support for supporting the cover,
When the cover portion is pressed by the water flow, the cover portion rotates in a direction pressed about the axis of the support to cover the surface of the front end portion of the water flow detection sensor (first position). ) To the second position, and the cover portion moves to the second position to expose the surface of the tip of the water flow detection sensor,
When the water flow stops, the cover part returns from the second position to the first position by its own weight. The support comprises an elastic body,
The support device fixes the cover portion to the first position by the weight of the cover portion and the elasticity of the elastic body,
When the cover part is pressed by a water flow, the cover part moves from the first position to the second position by rotating in a direction pressed around the axis of the support tool, and the cover When the portion moves to the second position, the surface of the tip of the water flow detection sensor is exposed,
2. The antifouling cover according to claim 1, wherein when the water flow stops, the cover portion returns from the second position to the first position by its own weight and elasticity of the elastic body of the support. The antifouling cover according to claim 1 or 2 , wherein the cover portion is provided with fins on a side pressed by a water flow.


A water flow detection sensor for detecting the water flow by the tip of the water,
The antifouling cover according to any one of claims 1 to 3,
The surface of the tip of the water flow detection sensor that is in contact with the cover is formed in a convex shape, and the surface of the cover that is in contact with the tip of the water flow detection sensor is the tip of the water flow detection sensor. A water flow detection device, wherein the water flow detection device is shaped into a concave shape of an arc so as to engage with the convex shape of the arc.

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