JPH0730736Y2 - Seawater intake jellyfish inflow prevention net - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a seawater intake jellyfish inflow prevention net.

[Conventional technology]

At a seaside thermal power plant, for example, FIG.
As shown in the plan view, the seawater intake 02 that is erected on the seabed GL and opens at the bottom of the underwater wall 01 that extends in the lateral direction.
In order to prevent the inflow of jellyfish, a plurality of rope locks 04, which are conventionally provided at appropriate intervals on the upper end 03 protruding above the sea surface WL of the undersea wall 01, are laterally arranged on the offshore seabed GL. A plurality of upright cube-shaped sinkers 05 arranged at appropriate intervals in the direction are connected to each other by a plurality of tensioned ropes 06, and a net 07 is stretched over them to prevent inflow of jellyfish.

With this kind of means, when a large amount of jellyfish arrives, the net 07 will be clogged and ended, so in that case, the undersea wall
A towboat is moored at 01 etc. to generate a thruster wake in the lateral direction orthogonal to the intake water flow 08, and the jellyfish on the net 07 is removed by the lateral water flow. Here, 09 is a car template.

However, such a jellyfish removing means has the following drawbacks.

(1) In order to obtain a sufficient lateral water flow 010, a large 3,000 horsepower class tugboat is required, so the charter fee is high and therefore uneconomical.

(2) When a large towboat cannot be moored at an appropriate position near the seawater intake port 02, it is uneconomical because there is no elimination effect unless the thruster wake is generated for a long time.

(3) Since sinker 05 is an upright cube, lateral water flow 010
Creates a complicated water flow around the
The jellyfish that was once excluded at 0 is made to flow into the intake 01 from the gap below the net 07.

[Problems to be solved by the device]

The present invention has been proposed in view of such circumstances,
Seawater intake jellyfish inflow prevention with excellent economic efficiency and elimination efficiency that does not use the wake of the propulsion system of a towboat and reliably generates a lateral water flow along the inflow prevention net to prevent clogging due to jellyfish The purpose is to provide the net.

[Means for Solving the Problems]

Therefore, in the present invention, the laterally extending upper edges are locked to the exposed sea surface of the car template at appropriate intervals, and the lower edges parallel to the upper edges are laterally spaced on the seabed off the car template. In the long rectangular seawater intake jellyfish inflow prevention net that is locked to each of the installed sinkers, the sinker whose cross section faces the car template and has a slope with an upward slope, and the sinker fixed to the slope of each sinker A swash plate extending in a direction, and a plurality of water flow generation mechanisms that are disposed on one end side of the net along the inclined surface of the net and that are oriented in a direction orthogonal to the intake water flow.

[Action]

Since a sinker having a slope having an upward slope in cross section facing the car template is provided, it is suitable for attaching a swash plate, and the lateral water flow along the net is less disturbed.

Further, since the swash plate extending in the lateral direction is fixed to the slope of each sinker, the jellyfish in the seawater lower layer is guided diagonally upward, and the lateral direction of the net arranged along the upper surface of the net at one end side of the net. Since a plurality of water flow generation mechanisms are provided, a water flow that laterally removes the jellyfish on the net can be generated. Further, since the plurality of water flow generation mechanisms are arranged in parallel, the width of the lateral water flow for jellyfish elimination is widened and the influence when the water flow generation mechanism fails is reduced.

〔Example〕

An embodiment of the present invention will be described with reference to the drawings.
The same reference numerals as in the figure show the same members as in the figure, respectively, and in the longitudinal sectional view of FIG. 1 and the plan view of FIG. A plurality of impellers supported in the sea by the structure 2 are arranged along the inclined surface of the net 07 and in a direction orthogonal to the direction of the intake water flow 08. Reference numeral 3 is a cable connecting the power source 4 and each impeller 1, and 5 is a plurality of sinkers laid in a row on the offshore seabed GL of the undersea wall 01 facing the rope locks 04, respectively. Is a triangle with an upward slope toward the car template 09.

6 is a swash plate which is fixed to the slope of each sinker 5 and extends in the lateral direction, 7 is a tidal current coming from offshore, and 8 is a lateral water flow generated by the impeller 1.

In such a device, in order to eliminate jellyfish, if a large amount of jellyfish rides on the tidal current 7 and reaches the seawater intake port 02 by rotating the impellers 1 A horizontal water flow 8 is generated, and the jellyfish on and near the net 07 is pushed laterally. At that time, the jellyfish in the lower layer of seawater is guided obliquely upward by the swash plate 6 to reach the net 07, and then is removed along the net 07 by the lateral water flow 8. Further, the sinker 5 causes the lateral water flow 8 to flow obliquely upward, so that the destruction along the jellyfish net 07 is further promoted.

According to such a device, the following effects can be obtained.

(1) Since the sinker is provided with a slope whose cross section faces the car template and has an upward slope, it is suitable for attaching a swash plate, and it does not disturb the lateral water flow, so the jellyfish is at the intake. It becomes difficult to inflow.

(2) Since the swash plate extending in the lateral direction is fixed to the slope of each sinker, the jellyfish in the lower seawater layer is guided obliquely upward, so that the jellyfish is less likely to flow into the intake port.

(3) Since a plurality of impellers are provided on one end side of the net along the upper surface of the net and are oriented in a direction orthogonal to the intake water flow, the jellyfish on the net is laterally eliminated. Water flow can be generated, so that the phenomenon of clogging of jellyfish on the net is eliminated.

(4) Since a plurality of impellers are installed side by side, the width of the lateral water flow for jellyfish elimination is widened, and therefore the jellyfish elimination efficiency is improved, and the impact when the impeller malfunctions is small and therefore reliable. The property is improved.

[Effect of device]

In short, according to the present invention, the laterally extending upper edges are locked to the exposed sea surface of the car template at appropriate intervals, and the lower edges parallel to the upper edge are laterally spaced on the seabed off the car template. In a long rectangular seawater intake jellyfish inflow prevention net that is locked to each of the plurality of sinkers installed in, the sinker having a slope with an upward slope in cross section facing the car template, and fixed to the slopes of each of the sinkers. By having a swash plate extending in the lateral direction and a plurality of water flow generation mechanisms that are arranged along one end of the net along the inclined surface of the net and are oriented in a direction orthogonal to the intake water flow, It does not use the wake of the propulsion device and reliably generates a lateral water flow along the inflow prevention net to prevent clogging due to jellyfish. Since obtaining a water taking Mizuguchi jellyfish inflow prevention nets, the present invention is intended on extremely valuable industrial.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment in which the present invention is applied to a seawater inlet of a thermal power plant, and FIG. 2 is a plan view of FIG. FIG. 3 and FIG. 4 are a vertical sectional view and a plan view, respectively, showing a jellyfish inflow prevention net at a seawater intake port of a known thermal power plant. 1 ... Impeller, 2 ... Support structure, 3 ... Cable, 4 ...
… Power supply, 5 …… Sinker, 6 …… Swash plate, 7 …… Tidal current, 8
…… Lateral water flow, 01 …… Underwater wall, 02 …… Seawater intake, 03
…… Upper end, 04 …… Rope lock, 06 …… Tension rope, 07
…… Net, 08 …… Intake water flow, 09 …… Car template, GL …… Sea floor, WL …… Sea level,

Claims (1)

[Scope of utility model registration request] 1. An upper edge extending in the lateral direction is locked at an exposed sea surface of a car template at appropriate intervals, and a lower edge parallel to the upper edge is installed on the seabed off the car template at appropriate intervals in the lateral direction. In a long rectangular seawater intake jellyfish inflow prevention net that is respectively locked to a plurality of sinkers, the sinker has a slope with an upward slope in cross section facing the car template, and a lateral direction fixed to the slope of each sinker. And a plurality of water flow generation mechanisms that are arranged on one end side of the net along the inclined surface of the net and that are oriented in a direction orthogonal to the intake water flow. Jellyfish inflow prevention net.