JP2003090029A - Intake for cooling water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intake for cooling water capable of solving such the fault that a large number of steel pipe piles are necessary for resisting against wave pressure acting on an impervious slab because the conventional intake for cooling water fix the impervious slab constituting a curtain wall by the steel pipe piles. SOLUTION: In the intake for the cooling water, the impervious slab for cutting off an upper layer water section on the front section of an channel port is connected between an anchor placed on the bottom having an opening section for a deep layer water intake and a floating body in a tiltable manner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake for cooling water, and more particularly to an intake for deep water in a bay used in thermal power plants, nuclear power plants and the like.

[0002]

2. Description of the Related Art In a restricted sea area such as a bay, there is little exchange of seawater with the open sea, and solar radiant heat in the summer and hot water discharged by companies, etc. accumulate, and especially the water temperature in the upper seawater rises. , Deep sea depth of 3-4m or more from the sea surface becomes clean seawater at low temperature.

Therefore, thermal power plants, nuclear power plants and the like, which mainly face the coast of the bay, have come to use deep water intake for the following reasons.

Since low-temperature cooling water is obtained in the summer, the thermal efficiency of the turbine is improved, fuel costs can be saved, the water discharge temperature can be lowered, and high-quality seawater with less pollution due to factory wastewater can be taken in. Most of the dust and debris floating near the sea surface can be prevented from entering the intake, the inflow of larval plankton such as shellfish into the waterway is reduced, and the adhesion of shellfish in the waterway is reduced.
The penetration of waves into the intake channel is mitigated and the circulating water pump can be operated stably.

Conventionally, there is a curtain wall type intake port as an intake port for taking in the cooling water. At this intake, as shown in FIG. 3, the curtain wall 3 is lowered below the sea level so as to surround the front part of the waterway entrance 2 to the power station in the bay 1, and the lower part of the curtain wall 3 between the bottom and the seabed is closed. Deep water is taken from the opening.

FIG. 4 shows a pile type structure of the curtain wall type water intake, 4 is an impermeable plate such as a plurality of PC (precast concrete) plates constituting the curtain wall 3, and 5 is each impermeable plate 4 described above. It is a steel pipe pile that is fixed to the seabed and is driven into the seabed.

FIG. 5 also shows a gravity type structure. In this example, instead of driving the steel pipe pile 5 into the seabed, a bottom slab concrete 6 is embedded in the seabed, and the steel pipe pile 5 is driven into the bottom slab concrete 6. .

[0008]

However, in the above-mentioned conventional water intake for cooling water, the height of the impermeable plate is increased in order to prevent the surface water from entering the waterway port 2 due to the difference in tide level. In addition, since a large wave pressure acts on the impermeable plate 4, a steel pipe pile 5 for fixing the impermeable plate 4 is required.
And many other steel materials were needed.

Further, it was necessary to drive the steel pipe pile 5 deep into the seabed and to increase the weight of the slab concrete.

The present invention eliminates the above-mentioned drawbacks.

[0011]

The intake for cooling water of the present invention comprises a water shield for blocking the upper water portion, an anchor arranged at the water bottom, and an opening for deep water intake provided in the anchor. And a floating body, and the water shield is tiltably connected between the floating body and the anchor.

The above-mentioned anchor is characterized by comprising a box culvert.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the water intake for cooling water of the present invention comprises a plurality of water shield plates 7 such as a PC plate for blocking the upper layer water portion of the front surface of the water inlet 2 to the power plant. And an anchor 9 composed of a plurality of box culverts or the like arranged on the seabed, which tiltably supports the lower end of each water shield 7 through a pivot 8, and for deep water intake provided on the anchor 9. The opening 10, the floating body 12 in which the upper portion of each of the water shield plates 7 is tiltably supported via the pivot portion 11, and the water shield plates 7 adjacent to each other
And a connecting member 13 that connects the two with each other.

Incidentally, the buoyancy and the upper and lower thickness of the floating body 12 are inclined at the upper surface of the floating body 12 even if the floating body 12 is pulled downward as a result of the water shield plate 7 inclining due to wave pressure. Is the value that makes it appear above the sea level.

Since the water intake for cooling water according to the present invention has the above-mentioned structure, it is possible to shut off the warm water in the upper layer of seawater by the water shield plate 7 and to take only the deep layer water.

[0017]

The structural effects of the present invention are listed below.

Since the entire water shield is located in the sea and receives buoyancy, it is possible to reduce the steel material that supports the weight of the water shield itself.

By replacing the anchor with a box culvert, an intake channel can be secured at the same time.

The wave pressure acting on the impermeable slab partially acts in the vertically downward direction, and since this force is applied to the box culvert, the stability of the box culvert during wave pressure is high.

Unlike the pile type structure, a lateral ground reaction force is not expected as a resistance force against a horizontal force, so that the influence of the quality of the ground is small.

The main structure (floating body, water shield, water passage) can be divided and manufactured on land and can be easily assembled on site, so that a large construction machine is not required.

Since the amount of steel material is smaller than that of the conventional structure,
The area required for anticorrosion is reduced.

[Brief description of drawings]

FIG. 1 is a side view for explaining a water intake port for cooling water according to the present invention.

FIG. 2 is a front view for explaining an intake port for cooling water according to the present invention.

FIG. 3 is a plan view for explaining an intake port for cooling water.

FIG. 4 is a side view for explaining a conventional water intake port for cooling water.

FIG. 5 is a side view for explaining another conventional water intake for cooling water.

[Explanation of symbols]

1 bay 2 waterway mouth 3 curtain wall 4 water barrier 5 steel pipe pile 6 Bottom slab concrete 7 water barrier 8 pivotal branches 9 anchor 10 openings 11 pivotal branch 12 floating body 13 Connection member

Continued front page    (72) Inventor Tsunehiro Sekimoto             Tochigi Prefecture Nasu-gun Nishinasuno-cho 4 Ward-cho 1534-1             Goyo Construction Co., Ltd. Technical Research Center

Claims (2)

[Claims] 1. An impermeable plate for blocking an upper layer water portion, an anchor arranged at the bottom of the water, an opening for deep water intake provided in the anchor, and a floating body, wherein the impermeable plate is the floating body and the floating body. An intake for cooling water, which is tiltably connected between anchors. 2. The water intake for cooling water according to claim 1, wherein the anchor comprises a box culvert.