JPH0161125B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a screen device for preventing floating debris in a water intake tower for preventing floating debris from flowing into a water intake tower installed in surface water such as a reservoir of a dam.

In order to prevent dust from flowing into water intake towers installed in surface water such as dam reservoirs, conventionally a support material such as a steel structure was installed on the main body of the water intake tower, and a prevention net was attached directly to this support material. In addition to maintaining the shape of the prevention net, it also functioned as a guide hardware to respond to fluctuations in the surface water level.

However, with this type of conventional net field device, the drag force of the prevention net received from surface water is directly transmitted to the main body of the water intake tower, which not only obstructs the water intake function at the water intake of the water intake tower, but also is aesthetically undesirable. There was a problem.

The present invention solves the above problems and maintains a constant shape so that it does not come into contact with the water intake tower as the surface water level fluctuates, without providing a support material such as a steel structure for supporting a prevention net on the water intake tower. An object of the present invention is to provide a screen device for preventing floating debris in a water intake tower that moves up and down while moving up and down.

An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, 1 is a water intake tower (not shown) attached to the dam independently, 2 is the bottom of the dam reservoir, and 3 is surface water.

Surrounding the water intake tower 1, a hexagonal net field 6 in which prevention nets 4 and synthetic resin or steel floats 5 are alternately arranged and connected is arranged so as to surround the water intake tower 1. It is placed floating on the water surface.

Reference numeral 7 denotes a mooring means for connecting the netting stations 6 and allowing the netting stations 6 to move up and down in response to changes in the water level of the surface water 3. The mooring means 7 connects a fixed pulley 8 installed at the bottom of each float 5 of the net field 6 and a movable pulley 10 attached by suspending a weight 9 located below the fixed pulley 8, with one end attached to the fixed pulley 8. A wire rope 11 fixed to the movable pulley 10 is wound around the movable pulley 10 for support, and the wire rope 11 extending from the movable pulley 10 is further wrapped around the fixed pulley 8 to surround the water intake tower 1 and from the net yard 6. A wire rope 1 is attached to a plurality of anchors 12 installed on the reservoir bottom 2 located outside.
1 with the other end locked. In the figure, 13 is a weight attached to the lower edge of the prevention net 4.

In addition, in the above-mentioned screen field device for preventing floating dust consisting of the screen field 6 and the mooring means 7, the mesh field 6 can change into an endless shape such as various planar polygonal shapes, and the mooring means 7 also corresponds to the shape. It is attached to each float 5 according to the number of floats 5 to be used.

Next, by configuring the present invention as in this embodiment, the present invention operates and produces effects as described below. That is, during use, the netting field 6 constituting the floating dust prevention screening field device always floats on the surface of the surface water 3 around the water intake tower 1 by the floats 5, 5, . Each float 5
are connected by the mooring means 7 and held in a fixed shape so as not to come into contact with the water intake tower 1, so floating debris (not shown) floating on the surface of the surface water 3 can be removed by the prevention net 4. The water can be captured and completely prevented from flowing into the water intake tower 1.

Further, when a change in height occurs in the water level of the surface water 3, the netting field 6 moves up and down according to the change in the water level due to the action of the floats 5, 5, . At this time, the net field 6 is only vertically displaced by each anchoring means 7 without changing its planar arrangement. That is, when the float 5 moves upward as the water level decreases, the movable pulley 10
moves upward by winding up the wire rope 11 while resisting the gravity of the weight 9, and the fixed pulley 8 and movable pulley 1
From fixed pulley 8 to anchor 1 by reducing the distance from
The length of the wire rope 11 up to 2 is adjusted to the length required for mooring. Moreover, since tension is always applied to the wire rope 11 due to the action of the weight 9, each float 5 in the netting station 6 is pulled outward on an extension line from the water intake tower 1 to each float 5. Therefore, the screen field 6 is always kept in the same shape and functions to prevent floating debris from flowing into the water intake tower 1 without coming into contact with the water intake tower 1.

Conversely, when the float 5 moves downward as the water level decreases, the distance between the fixed pulley 8 and the movable pulley 10 increases, but tension is always applied to the wire rope 11 due to the action of the weight 9. Therefore, as described above, the netting field 6 is always kept in the same shape, and floating debris can be prevented from flowing into the water intake tower 1.

Therefore, according to the screen device for preventing floating debris in a water intake tower according to the present invention, it is possible to prevent floating debris from flowing into the water intake tower by using the screen connected by the mooring means, and moreover, it is possible to prevent floating debris from flowing into the water intake tower. Even if the water level changes, the screen can be moved up and down by the float, and the shape of the screen can be maintained by the mooring means so that it does not come into contact with the water intake tower 1, thus preventing floating debris from flowing into the water intake tower. The function is not impaired, and the water intake function of the water intake tower can be maintained at all times.

In addition, since only the screen field is exposed above the water surface, the screen field device for preventing floating debris in a water intake tower of the present invention also has the effect of providing a good aesthetic appearance to viewers when installed.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the screen device for preventing floating debris in a water intake tower according to the present invention, and is a front view showing the state in which it is arranged around the water intake tower, and FIG. 2 shows the device shown in FIG. 1. FIG. 1... Water intake tower, 3... Surface water, 4... Prevention net, 5... Float, 6... Net field, 7... Connecting means, 8... Fixed pulley, 9... Weight, 10... Movable pulley, 11... Wire rope, 12...Anchor.

Claims (1)

[Claims] 1. A net field formed by alternately connecting floats and prevention nets to form an endless planar shape is placed surrounding the water intake tower constructed in surface water so as not to come into contact with the water intake tower, and the net field is , a plurality of anchors placed on the bottom of the reservoir surrounding the water intake tower and located outward from the net field, each connected with a wire rope,
A netting field device for preventing floating debris in a water intake tower, characterized in that a part of the wire rope is wound around a fixed pulley attached to the netting field and a movable pulley from which a weight is suspended.