JP6065162B1 - Aiba facility - Google Patents

Abstract

The present invention is arranged near the intake E of the flow-in hydroelectric power plant, and the floating material K including dust and driftwood flows into the intake E provided adjacent to the fishway R3 of the intake channel R2 branched from the main flow R1. A net-floor facility 1 for preventing a long float 2 arranged so as to cross the front of the water intake E toward the fishway R3, and a screw 3 spirally provided on the outer periphery thereof. The float 2 is supported so as to be rotatable along the flow of the main flow R1 with respect to the support portions 4 and 5 disposed at the upstream side of the intake channel R2 at the upstream end of the intake channel R2. Yes. Therefore, the float 2 is rotated using the flow velocity of the fishway R3, so that the suspended matter K drifting on the float 2 is collected by the screw 3, and the collected suspended matter K is floated without flowing to the screen 10 side. It can be easily removed by guiding it to the fishway R3 using the rotation of No. 2, and smooth water circulation in the intake channel R2 can be ensured.

Description

  The present invention relates to a network facility that is disposed in the vicinity of a water intake of a power plant and prevents floating substances such as dust and driftwood from flowing into the water intake.

  Conventionally, there are various types of hydroelectric power generation equipment. One of them is a flow-type power generation equipment that generates power by supplying water taken from rivers, dams, etc. to a power generation device (turbine). is there. Such a hydroelectric power generation facility supplies water to the power generation device via an intake channel branched from the mainstream. However, when natural objects such as fallen leaves mixed with water, wastes caused by illegal dumping, etc. (hereinafter collectively referred to as dust) flow in, the power generator may be damaged. For this reason, usually, a screen that prevents the passage of dust while allowing the water to flow is installed at the intake port that is the inlet of the intake channel.

  Such a screen is configured by a plurality of bars arranged side by side at predetermined intervals, or by forming bars in a vertical and horizontal manner to form a lattice, and while the bars prevent the passage of dust, Through the water.

  By the way, rivers and dams after typhoons and heavy rains often contain large floating objects such as driftwood, which may destroy the screen or clog the screen. A net is provided to prevent the passage of suspended solids.

  This net is composed of a float and a net connected to the lower part of the float and set to a predetermined width in the vertical direction. The float and the net are arranged on the main stream side and the intake channel side in front of the screen. It is arranged to separate. Thereby, the net place moves up and down corresponding to the water level, and enables the supply of water to the water intake port while preventing the passage of floating substances floating on the water surface.

  However, as mentioned above, if the passage of suspended matter is blocked in the net place, the floating matter that flows in sequence from the upstream side drifts to the net place, and the water intake to the intake channel is damaged, or the suspended floating matter In some cases, objects may flow from the bottom of the screen material to the screen side.

  Therefore, it is necessary to remove floating substances that have drifted to the net, but it is difficult to directly remove floating substances from the revetment because the distance from the revetment to the net is generally long. Therefore, an operator will get on board the ship and remove the floating material that has drifted to the net, but if the floating material that has drifted to the net is large or large driftwood, etc. The removal work is complicated and places a heavy burden on the operator.

  In view of this, there has been proposed one in which one end of the net is lifted from the water surface by an elevating means, and the floating substance drifting on the net is removed by flowing downstream (see, for example, Patent Document 1).

JP 2004-100169 A

  However, as described above, the dust removal equipment configured in Patent Document 1 is configured to lift floating nets from the surface of the water, so that suspended matter flows on the downstream side (screen side) of the nets. It is against the original purpose of setting up the venue. That is, the dust removing means configured as described above may remove the dust that has drifted to the net, so that floating substances may flow downstream and damage or clog the subsequent screen.

  The present invention has been made in view of the above-described problems, and it is possible to easily remove floating substances floating on the float without flowing to the screen side, and to realize a network facility that can ensure smooth water circulation in the intake channel. Objective.

In order to solve the above problems, the network equipment according to the present invention is:
A network facility installed near the intake of a flow-in hydroelectric power plant to prevent floating substances including dust and driftwood from flowing into the intake provided adjacent to the fishway of the intake channel branched from the mainstream Because
A long float arranged to cross the front of the water intake toward the fishway;
A blade portion spirally provided on the outer periphery of the float,
The float is rotatably supported along the flow of the main flow with respect to a support portion having an end located on the upstream side of the main flow in the vicinity of the water intake , and downstream of the main flow. The other end located at is provided with a windsock member for guiding the suspended matter collected by the blades to the fishway .

  The float preferably has a diameter on the upstream side larger than that on the downstream side. In addition, it is desirable that the blade portion is set such that the amount of protrusion from the float on the downstream side is larger than the amount of protrusion on the upstream side.

  It is preferable that the float is formed of a cylindrical member, and is arranged in the spiral shape by winding the blade portion around the float.

  ADVANTAGE OF THE INVENTION According to this invention, the net | floor field equipment which can have the outstanding effect that it can remove easily without flowing the floating substance which floated on the float to the screen side, and can ensure the smooth water circulation of an intake channel is realizable.

It is a partial top view which shows the hydroelectric power generation equipment containing the net place equipment which concerns on one Embodiment of this invention. It is the side view which showed the network equipment concerning one Embodiment of this invention, and was seen from the water intake side.

Hereinafter, a network facility according to an embodiment of the present invention will be described with reference to the accompanying drawings.
Such a network facility is used for a flow-in type hydroelectric power generation facility having a water intake channel that branches off from a river (mainstream) where a dam is formed by partially blocking and supplies water to a power generation device. .

  Here, the flow-type hydroelectric power generation facility will be briefly described. As shown in FIG. 1, the hydroelectric power generation facility includes a dam body B so as to partially dam a river R1 (hereinafter referred to as a mainstream R1). An intake channel R2 that is provided and is connected to a power generator (not shown) such as a turbine is branched upstream of the dam body B. In addition, a fishway R3 that communicates the upstream side and the downstream side of the main stream R1 so as to be aligned with the levee body B (bypassed) is adjacent to the downstream side of the intake E on the shore branching to the intake channel R2. Is provided. As a result, the hydroelectric power generation facility takes a predetermined amount of water from the river R1 into the water channel R2 and supplies the water to the power generation device to generate power, while the water exceeding the water intake reaches the dam B and goes downstream. It overflows to the side (overflows). At this time, the bank B is opened and closed as a sand removal gate, so that the sediment deposited with the water flow can be discharged.

  As shown in FIG. 1 and FIG. 2, the netting facility 1 of the present embodiment includes a water intake E provided adjacent to a fishway R3 of a water intake channel R2 branched from a main flow R1 in which water flows from the upstream side to the downstream side. This is for preventing floating matter K including dust and driftwood from flowing into the intake E.

  Specifically, the net place facility 1 includes a long float 2 disposed so as to cross the front of the metal screen 10 disposed in the intake E toward the fishway R3, and an outer periphery of the float 2. And a screw 3 as a blade portion provided in a spiral shape.

  The float 2 is formed of a resin molded body having a hollow inside, or a tubular material of foaming resin or the like (here, made of foamed polystyrene) and floats on water. Even if the screw 3 is provided, the float 2 sinks in water. Buoyancy is set so as not to get in. In this case, the float 2 includes floats 21, 22, 23, and 24 divided into four parts, which are connected to each other so as to be rotatable about an axis. The float 2 is not limited to four divisions, and may be divided into a plurality of pieces or may be formed integrally.

  Further, the screw 3 is made of a band-shaped joint material provided with an adhesive member along the longitudinal direction at one end portion in the width direction, and is spirally wound around the outer periphery of the float 2 via the adhesive member to be bonded. Arranged in a shape. Therefore, in this netting facility 1, the screw 3 is arranged spirally on the outer periphery of the cylindrical float 2, thereby realizing a structure that easily rotates due to the flow of the main flow R1 and the flow of the fishway R3.

  In addition, although the case where the net place equipment 1 has the same outer diameter as a whole and obtains a stable rotational force is described here, a structure that can stably rotate without wobbling due to the flow of the mainstream R1 or the fishway R3 This is not necessarily the case as long as it can be realized.

  The float 2 has an end 21 a located on the upstream side of the intake channel R <b> 2 on a fixing weight 4 that is a support portion disposed in the vicinity of the intake E and a vertically moving wire 5 provided on the fixing weight 4. On the other hand, it is rotatably supported along the flow of the main flow R1. As a result, the net place facility 1 obtains tension due to the water flow when the flow of the main flow R1 hits the screw 3, and rotates around the flow direction of the main flow R1 as the rotation center, and the floating floating material K between the adjacent screws 3 Are collected along the screw 3 and led to the downstream side. Therefore, since the suspended matter K that has drifted to the float 2 is always removed, it is possible to eliminate the labor (labor) of the removal work by human power.

  Here, in the net place facility 1, in addition to the fact that the one end 21a of the float 2 is supported by the vertical movement wire 5 so as to be rotatable along the flow of the main flow R1, the fluctuation of the water level of the main flow R1. Accordingly, it is allowed to move up and down.

  Further, the float 2 is preferably provided with a wind-off member 6 for guiding the suspended matter K collected by the screw 3 to the fishway R3 at the other end 24a located on the downstream side of the main flow R1. Thereby, the force which pulls the float 2 arises by arrange | positioning the windsock member 6 in which the float 2 is provided in the other end part 24a to the fishway R3 side where the area where water flows is smaller than the water intake E. Further, the blowing member 6 makes it possible to obtain a rotational force by applying a water flow having a high flow velocity to the screw 3. For this reason, the float 2 (screw 3) can be stably rotated without using the flow of the fishway R3 having a high flow rate and a high flow rate without causing the float 2 (screw 3) to fluctuate from side to side.

  At this time, in the network facility 1, the one end 21a of the float 2 is only supported so as to be rotatable with respect to the up and down movement wire 5 of the fixing weight 4, as described above. 24a is in a free state. That is, the network facility 1 of the present embodiment is different from the conventional general network facility in that the structure of the float 2 is supported only on one side without being supported at both ends, thereby simplifying the facility. Can be achieved.

  In addition, the float 2 is desirably formed so that the diameter on the upstream side (float 21) is larger than the diameter on the downstream side (float 24). As a result, in the float 21 corresponding to the part of the net place facility 1 where the suspended matter K is easily collected and collected, the amount of protrusion of the screw 3 is reduced as the diameter of the float 21 is increased. The amount of suspended matter K to be reduced can be reduced. Therefore, the capacity of the floating material K to be concentrated locally exceeds the capacity to be led to the downstream side, and as a result, the floating material K is prevented from flowing over the float 2 and flowing into the water intake E (screen 10) side. be able to.

  Further, the screw 3 has a protruding amount from the float 2 on the downstream side (that is, a protruding amount of the screw 3 protruding from the outer periphery of the float 24) is an upstream protruding amount (that is, the screw 3 protruding from the outer periphery of the float 21). It is desirable that it is set to be larger than the protrusion amount. Thereby, in the float 24 corresponding to the site | part arrange | positioned in the position where the flow velocity is obtained as the net place equipment 1, the protrusion amount of the screw 3 protruding from the outer periphery is larger than the protrusion amount of the screw 3 protruding from the outer periphery of the float 21. By enlarging it, it is possible to easily take in a flow having a large flow rate and a high flow rate.

  In this way, the outer diameter of the network facility 1 as a whole is made uniform (same), and the outer diameter of the float 2 and the protruding amount of the screw 3 are partially increased / decreased as necessary, so that the front side of the intake E Then, it is possible to improve the effect of preventing the floating material K from flowing in and to optimize the function such that the rotational force of the netting facility 1 can be stably obtained on the downstream side of the fishway R3.

  As described above, according to the netting facility 1 of the present embodiment, the screw 3 is helically disposed on the outer periphery of the cylindrical float 2, which is caused by the flow of the mainstream R1 and the flow of the fishway R3. Thus, a structure that is easy to rotate can be realized. Further, one end 21a located on the upstream side of the intake channel R2 is supported rotatably along the flow of the main flow R1 with respect to the up and down movement wire 5 of the fixing weight 4 disposed in the vicinity of the intake port E. As a result, the network facility 1 obtains tension due to the water flow when the flow of the main flow R1 hits the screw 3, rotates around the flow direction of the main flow R1 as a center of rotation, and adjoins the suspended matter K adjacent to the screw. While gathering between the three, it can be led downstream along the screw 3. Therefore, since the suspended matter K that has drifted to the float 2 is always removed, it is possible to eliminate the labor (labor) of the removal work by human power. Thus, it is possible to easily remove the suspended matter K that has drifted to the float 2 without flowing it toward the screen 10 side, and it is possible to achieve an excellent effect that smooth water circulation in the intake channel R2 can be secured.

  In addition, by disposing the windsock member 6 in which the float 2 is provided at the other end 24a on the side of the fishway R3 where the water flowing area is smaller than the intake port E, the water flow having a high flow velocity is supplied to the screw 3 by the windsock member 6. Since the rotational force can be obtained by applying, the float 2 (screw 3) can be stably rotated without using the flow of the fishway R3, which has a high flow rate and a high flow rate, without shifting from side to side with respect to the flow. it can.

  Furthermore, in the network facility 1, unlike the conventional general network facility, it is structured such that only one side of the one end 21 a of the float 21 is supported without being supported at both ends of the float 2. Equipment can be simplified.

  Furthermore, in the float 21 corresponding to the part where the suspended matter K is easily gathered and collected as the net place facility 1, the diameter of the float 21 is increased and the protruding amount of the screw 3 is set to be small. The amount of suspended matter K to be reduced can be reduced. Therefore, the capacity of the floating material K to be concentrated locally exceeds the capacity to be led to the downstream side, and as a result, the floating material K is prevented from flowing over the float 2 and flowing into the water intake E (screen 10) side. be able to.

  Further, in the float 24 corresponding to the part disposed at the position where the flow velocity is obtained as the netting facility 1, the protruding amount of the screw 3 protruding from the outer periphery thereof is larger than the protruding amount of the screw 3 protruding from the outer periphery of the float 21. By doing so, it is possible to easily take in a flow having a large flow rate and a high flow velocity.

  In this way, the outer diameter of the network facility 1 as a whole is made uniform (same), and the outer diameter of the float 2 and the protruding amount of the screw 3 are partially increased / decreased as necessary, so that the front side of the intake E Then, it is possible to improve the effect of preventing the floating material K from flowing in and to optimize the function such that the rotational force of the netting facility 1 can be stably obtained on the downstream side of the fishway R3.

  It should be noted that the present invention can be appropriately changed without departing from the spirit or concept of the invention that can be read from the claims and the entire specification, and the network equipment with such a change is also a technical idea of the present invention. include.

DESCRIPTION OF SYMBOLS 1 Net place equipment 2 (21-24) Float 21a One end part 24a Other end part 3 Screw (blade part)
6 Streaming member 10 Screen B Dike body R1 River (mainstream)
R2 intake channel R3 fishway E intake K float

Claims (4)

A network facility installed near the intake of a flow-in hydroelectric power plant to prevent floating substances including dust and driftwood from flowing into the intake provided adjacent to the fishway of the intake channel branched from the mainstream Because
A long float arranged to cross the front of the water intake toward the fishway;
A blade portion spirally provided on the outer periphery of the float,
The float is rotatably supported along the flow of the main flow with respect to a support portion having an end located on the upstream side of the main flow in the vicinity of the water intake , and downstream of the main flow. A screen facility for guiding the suspended matter collected by the blades to the fishway is provided at the other end located at the top. 2. The netting facility according to claim 1, wherein the float has a diameter on the upstream side that is larger than a diameter on the downstream side. 3. The netting facility according to claim 1, wherein the blade portion is set such that a protruding amount from the float on the downstream side is larger than the protruding amount on the upstream side. The said float consists of a cylindrical member, and the said blade | wing part is arrange | positioned in the said spiral shape by being wound around the said float. The netting field installation as described in any one of Claims 1-3 characterized by the above-mentioned. .