JP2009008567A - Flow measurement system of river - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new flow measurement system of a river, that moves and sets a current meter in a specific place of the river and measure the flow rate at the place. <P>SOLUTION: The flow measurement system of the river includes the current meter for measuring the flow rate of the river, a depth direction positioning means for positioning the current meter in the depth direction of the river, a river width direction moving means for moving the current meter in the river width direction of the river, and a means for supporting the current meter, a depth direction positioning means, and a river width direction moving means. The current meter is moved and set in the specific place of the river, and the flow rate at the place is measured. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a river flow measurement system.

  When planning the construction of a hydroelectric power plant, it is necessary to collect the flow rate data by measuring the flow rate of the river flowing into the planned dam in advance. The same applies when planning irrigation water for paddy fields.

  1 and 2 are diagrams for explaining a conventional river flow rate measuring method. Conventional flow measurement is, in a nutshell, building a simple bridge at each measurement location, and an operator sunk an anemometer into water from the bridge.

  Specifically, a single-pipe ladder 52 is handed over the river 11, a plurality of scaffolding boards 54 are placed on it and fixed with a number line, a simple bridge is built, and fixed to an existing fence 40, an existing handrail 42, etc. To do. The worker P measures the flow velocity by submerging the measuring rod 48 to which the anemometer 12 is attached in water manually.

  According to such a flow rate measuring method, for example, the flow rate is measured at 25 locations for one water channel. Since the anemometer 12 has a flow prevention weight (weight) and is very heavy, a chain block (not shown) is used to move the anemometer 12 up and down against the flow. In such a measuring method, it takes about two days to measure the flow rate at one location of the river.

  In addition, since a simple bridge was built, it was expensive, and it was dangerous to work manually on the scaffold.

  Therefore, in view of these problems, an object of the present invention is to provide a novel river flow measurement system.

  In view of the above-described object, a river flow rate measuring system according to the present invention includes a flowmeter for measuring a flow velocity of a river, a water depth direction positioning means for positioning the flowmeter in a depth direction of the river, and the flowmeter for the river. A river width direction moving means that moves in the river width direction, and a means for supporting the current meter, the water depth direction positioning means, and the river width direction moving means, and moving the current meter to a specific location in the river Measure the flow velocity at that point.

  Further, in the river flow measurement system, the anemometer may be attached with a weight so as to sink to a desired depth in water. Further, in the river flow measurement system, the weight is attached in the axial direction of the velocimeter, and has a flow direction stabilizing blade at one end so that the flow meter can determine the direction along the flow of the river. May be. Furthermore, in the river flow rate measuring system, the water depth direction positioning means may include a winder attached to one end or midway of a wire from which the flowmeter is suspended. Further, in the river flow rate measurement system, the hoisting machine is an electric winch that can be operated wirelessly, and the velocimeter is moved in the water depth direction and positioned at a desired depth of the river by an operator's wireless operation. You may be able to do that. Further, in the river flow rate measuring system, the river width direction moving means is suspended from a river crossing wire stretched across the river via a pulley and is movable along the river crossing wire. You may make it have the wire which suspended the meter, and the tow rope which pulls this velocimeter hanging wire to the right and left, respectively. Further, in the river flow measurement system, the water depth direction positioning means has means for displaying the position of the current meter in the water depth direction, and the river width direction moving means displays the position of the current meter in the river width direction. You may make it have a means to do. Furthermore, the river flow rate measurement system further includes an auxiliary wire that pulls the current meter in the upstream direction of the flow in order to prevent the current meter from flowing into the river flow and being displaced from the desired position. May be.

  Further, the river flow measurement system according to the present invention includes a first wire stretched in the river width direction above the river, and a first wire suspended from the first wire so as to be movable along the first wire. 2 wires, an electric winch attached to one end or in the middle of the second wire, and a current meter attached to the second wire or the electric winch.

  Furthermore, the river flow rate measuring method according to the present invention suspends the anemometer from an electric winch attached to one end or in the middle of the wire, and moves the wire along another wire stretched in the river width direction. The current meter is set at a desired position in the width direction of the river and a desired position in the depth direction of the river, the flow velocity is measured, and the flow rate of the river is calculated from the flow velocity data and the cross-sectional area data of the river.

  Furthermore, the installation method of the river flow measurement system according to the present invention prepares for construction, moves to the grounding location, installs single pipe pipes on both banks of the river, and anchors near each single pipe pipe. Is connected to the single pipe pipe to reinforce it, and a river crossing wire is stretched between the single pipe pipes, and a wire having a velocimeter suspended is attached so as to be movable along the river crossing wire. An anemometer is attached to the meter suspension wire via an electric winch.

  According to the present invention, a novel river flow measurement system can be provided.

  Hereinafter, embodiments of a river flow measurement system according to the present invention will be described with reference to the accompanying drawings. In the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

[Flow measurement system]
FIG. 3 is a view of the flow rate measurement system according to the present embodiment as viewed in the river width direction of the river. The flow rate measurement system 10 includes a flow velocity meter 12 that measures a flow velocity at a specific location in a river 11, and means for positioning the flow velocity meter 12 in the depth direction of the river 11 (that is, a water depth direction positioning device) 16 and 18. The velocimeter 12 includes river width direction moving means 20 and 32 for moving the velocimeter 12 in the river width direction of the river 11, and means 24, 28 and 30 for supporting these means. This flow measurement system 10 is installed so as to cross the river 11, and the velocimeter 12 is set by moving to a specific location (that is, an arbitrary position in the river width direction and an arbitrary position in the depth direction of the river). And the flow velocity at that point can be measured.

  Each element of the flow measurement system will be described.

  As the anemometer 12, for example, an open channel anemometer available on the market can be used. For example, a Sankei type 3 velocimeter I type manufactured by Sankei Surveyor Co., Ltd. As shown in FIG. 4, the anemometer 12 has a generally cylindrical or spindle-shaped main body and a propeller having a rotation axis in the axial direction, and the propeller rotates by the flow of the river 11 to measure the flow velocity. The measurement result of the flow velocity is (i) displayed on the liquid crystal of the main body, (ii) displayed on the indicator at hand, or (iii) by counting sounds, signals, etc. emitted per rotation per unit time. ,can get.

  As shown in FIG. 4, the anemometer 12 may preferably be attached with a weight 14 in the axial direction so that it sinks to a desired depth in water and can be oriented along the river flow. For example, the weight 14 has a spindle shape, has a flow direction stabilizing blade 15 at one end, and has a predetermined weight. By attaching the weight 14 in the axial direction of the velocimeter 12, the velocimeter 12 is stably controlled in the flow direction of the river 11, and the flow velocity can be measured more accurately.

  Referring to FIG. 3 again, the means for positioning the velocimeter 12 in the depth direction of the river 11 (water depth direction positioning means) is, for example, another wire suspended from the upper river crossing wire 22 (velocimeter hanging wire). ) It consists of a winder 18 attached to one end or halfway of 16. The anemometer hanging wire 16 is preferably provided with means for displaying the position of the anemometer 12 in the water depth direction. For example, a memory is displayed on the velocimeter hanging wire 16 at regular intervals so that the water depth can be checked. The hoisting machine 18 is an electric winch that can be operated wirelessly, for example, and can move the velocimeter 12 up and down and position it at a desired depth in the river by an operator's wireless operation. As the hoisting machine 18, for example, a small electric hoist or a small electric chain block manufactured by Fuji Seisakusho Co., Ltd., located in Nomi City, Ishikawa Prefecture, can be used.

  The means for moving the velocimeter 12 in the river width direction of the river 11 (river width direction moving means) suspends the velocimeter hanging wire from the river crossing wire 22 stretched across the river via the pulley 20. The tow ropes 32-1 and 32-2 are configured to be movable along the river crossing wire 22 and tow the velocimeter hanging wire 16 to the left and right respectively. The river crossing wire 22 is preferably provided with means for displaying the position of the anemometer in the river width direction. For example, a memory is displayed on the river crossing wire 22 at regular intervals so that the position in the river width direction can be checked.

  The means for supporting these means are, for example, support columns 24 (for example, single pipe pipes) 24 that are respectively installed on both banks for locking the end of the river crossing wire 22 and existing structures for fixing these support columns. The fence 26 is provided. Further preferably, the means for supporting these means is, for example, a fixing means (for example, an anchor plug, an anchor bolt, etc.) 28 firmly fixed to the ground, and a connecting means (for connecting the support column 24 to the fixing means 28). For example, a wire, a rope, etc.) 20 may be included.

  Further, in order to prevent the velocimeter 12 and the weight (weight) 14 from flowing into the flow of the river and being displaced from the desired position, an auxiliary wire that pulls the velocimeter 12 and the weight (weight) 14 in the upstream direction of the flow. (Not shown) may be provided.

(Flow measurement method)
The details of the flow rate measurement method are basically carried out in accordance with the “Power Generation Hydraulic Flow Survey Guide” compiled by the Ministry of Economy, Trade and Industry, Ministry of Economy, Trade and Industry, Agency for Natural Resources and Energy, Public Utility Division, Electric Power Technology Division and edited by the Electric Power Civil Engineering Association.

  Based on the flow velocity data obtained by the flow rate measurement system of the river flow measurement system described above, an average flow velocity is obtained by a predetermined method, and this is multiplied by the cross-sectional area of the river to calculate a flow rate per unit time.

  Alternatively, the river cross-sectional area is divided into a predetermined number, the flow velocity is measured for each divided cross-sectional area, the flow velocity is calculated for each divided cross-sectional area, the flow rate for each cross-section is obtained, and these are summed. Calculate the total flow rate.

[How to install a flow measurement system]
FIG. 5 is a flowchart illustrating an installation method of the river flow measurement system 10 according to the present embodiment.

  In step S01, in order to prepare for construction, prior inspections such as tool inspection and operation confirmation are performed.

  In step S02, tools and materials are transported to move to the grounding location.

  In step S03, in order to install the strut (single pipe pipe) 24, for example, the front ends of the struts (single pipe pipe) 24 are driven into the ground on both sides of the river and fixed. At this time, sufficiently check the strength of the fixed part.

  In step S04, a fixing means is installed to reinforce the column (single pipe pipe) 24. For example, anchor plugs, anchor bolts, etc. are driven into the ground near the single pipe plugs installed on both sides of the river, and firmly fixed. At this time, sufficiently check the strength of the fixed part.

  In step S05, the river crossing wire 22 is attached. For example, an auxiliary rope (not shown) is traversed from the upstream of the river 11, moved to the installation location of the flow measurement system 10, a river crossing wire 22 is connected to the tip of the auxiliary rope, and the auxiliary rope is wound up from the shore to take up the river. The crossing wire 22 is traversed. Thereafter, one end of the river crossing wire 22 is fixed to the tip of a post (single pipe) 24 on the other bank with a clip, and the other end of the river crossing wire 22 is pulled from the opposite bank with a chain binder (not shown). 24.

  In step S06, water depth direction positioning means is attached. For example, the pulley 20 is attached to the river crossing wire 22, the velocimeter hanging wire 16 is attached to the pulley 20, and the winder 18 is attached to one end or the middle of the wire. An anemometer 12 and a weight 14 are suspended from the hoisting machine 18 in advance. Thereafter, the flow rate of the river 11 is measured.

  When the flow measurement of the river 11 is completed in step S07, these flow measurement systems 10 are disassembled in the reverse order to the installation order, and tools, materials, etc. are cleaned up and carried out.

[Alternative examples]
The river flow measurement system according to this embodiment has been described above. However, these embodiments are merely examples, and do not limit the present invention. The present invention includes additions, deletions, modifications, and improvements to those embodiments that can be easily made by those skilled in the art.

  For example, there are various means for reinforcing the support depending on the topography. Hereinafter, a brief description will be given with reference to FIGS.

  The means shown in FIGS. 6 (A) and 6 (B) are six single pipe pipes in which the support pillars 24 are assembled in a triangular pyramid shape, and their tips are connected to nearby trees for reinforcement.

  The means shown in FIGS. 7 (A) and 7 (B) is an example in which an existing fence is installed along a river, and the middle of a post 24 composed of a single pipe is fixed to the existing fence, The lower end is fixed to the concrete base of the existing fence.

  The means shown in FIGS. 8 (A) and 8 (B) is an example in which an existing fence is installed along the river, but the middle of the pillar made of a single pipe is fixed to the existing fence, and the upper end of the pillar Is reinforced with another single pipe.

  Thus, various alternatives can be given for each means. The present invention includes all these alternatives.

  The technical scope of the present invention is defined based on the description of the appended claims.

FIG. 1 is a diagram for explaining a conventional river flow rate measuring method together with FIG. 2. FIG. 2 is a diagram for explaining a conventional river flow rate measuring method together with FIG. 1. FIG. 3 is a view of the flow rate measurement system according to the present embodiment as viewed in the river width direction of the river. FIG. 4 is a diagram showing details of the anemometer and the weight. FIG. 5 is a flowchart illustrating an installation method of the river flow measurement system according to the present embodiment. FIG. 6 is a diagram for explaining another example of the means for reinforcing the support. FIG. 7 is a diagram for explaining another example of means for reinforcing the support. FIG. 8 is a diagram for explaining another example of means for reinforcing the support.

Explanation of symbols

  10: Flow measurement system, 11: River, 12: Current meter, 14: Weight (weight), 15: Flow direction stabilizing blade, 16: Current meter hanging wire, 18: Depth direction positioning means, 20, 32: River width direction Moving means, 20: connecting means, wire, rope, 18: hoisting machine, 20: pulley, 24: strut, single pipe, 28: fixing means, anchor plug, anchor bolt, Sakata plan 40: existing fence, 42: existing Handrail, 54: scaffolding board, 52: single pipe ladder, P: worker,

Claims (11)

An anemometer to measure the flow velocity of the river,
Water depth direction positioning means for positioning the anemometer in the depth direction of the river;
River width direction moving means for moving the anemometer in the river width direction of the river;
A flow rate of a river comprising: the anemometer, a means for supporting the water depth direction positioning means and the river width direction moving means; and the flowmeter is set by moving to a specific location of the river and measuring the flow velocity at that location Measuring system. The river flow measurement system according to claim 1,
The flow rate measurement system for a river, wherein the anemometer is attached with a weight so as to sink to a desired depth in water. The river flow measurement system according to claim 2,
The river flow measurement system, wherein the weight is attached in the axial direction of the anemometer, and has a flow direction stabilizing blade at one end so that the flow meter can determine the direction along the river flow. The river flow measurement system according to claim 1,
The water depth direction positioning means is a river flow rate measuring system having a winding machine attached to one end or a middle of a wire from which the flow meter is suspended. In the river flow measurement system according to claim 4,
The hoisting machine is an electric winch that can be operated wirelessly, and can be positioned at a desired depth of the river by moving the anemometer in the water depth direction by radio operation of an operator. The river flow measurement system according to claim 1,
The river width direction moving means includes a wire suspended from the river crossing wire stretched across the river via a pulley and suspended from the anemometer that is movable along the river crossing wire, and the flow velocity A river flow measurement system having a pulling rope for pulling a measuring wire to the left and right respectively. The river flow measurement system according to claim 1,
The depth direction positioning means has means for displaying the position of the anemometer in the depth direction,
The river width direction moving means has a means for displaying a position of the anemometer in the river width direction. The river flow measurement system according to claim 1, further comprising:
A river flow measurement system comprising an auxiliary wire that pulls the anemometer in the upstream direction of the flow in order to prevent the anemometer from flowing into the river flow and moving it to a desired position. A first wire extending in the width direction of the river above the river;
A second wire suspended from the first wire movably along the first wire;
An electric winch attached to one end or the middle of the second wire;
A river flow rate measurement system comprising: a flowmeter attached to the second wire or the electric winch. Hang the anemometer on the electric winch attached to one end or the middle of the wire,
Moving the wire along another wire stretched in the river width direction;
Set the anemometer at a desired river width direction position and a desired river depth direction position, measure the flow velocity,
A method for measuring the flow rate of a river, wherein the flow rate of the river is calculated from the flow velocity data and the cross-sectional area data of the river. Prepare for the construction
Move to the ground
Single pipes are installed on both sides of the river,
An anchor is driven in the vicinity of each single pipe and connected to the single pipe to reinforce it.
A river crossing wire is stretched between the single pipes,
Attach a wire with a suspended anemometer so that it can move along the river crossing wire,
An installation method of a river flow rate measurement system, in which an anemometer is attached to the anemometer suspension wire via an electric winch.