JPH07197494A - Hydraulic gradient managing method - Google Patents

Abstract

PURPOSE:To simultaneously display and output a plurality of computing results classified by a time by a method wherein dynamic water and a hydraulic gradient are automatically computed and outputted from a data file available when water pressure is measured. CONSTITUTION:From a water pressure measurement data file at a plurality of points of a distributing pipe system recorded on the recording medium of a computer, at least measuring date data, water pressure actual measurement data, and a ground height at least at two measurement points are respectively read. Line length data between the points and desired date data are inputted from a key board and water pressure actual measurement data at an input date is retrieved and picked up. Picked up data is converted into head data and a loss head between the points and a hydraulic gradient on the input date are computed and outputted and displayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention finds a hydraulic head at a specific point and a hydraulic gradient between points from a measured data file of water pressure values at arbitrary plural measuring points of a water distribution pipe system, and measures these at a measuring time. The present invention relates to a hydraulic gradient management method for displaying separately or simultaneously.

[0002]

2. Description of the Related Art The measurement of water pressure in a water pipeline is performed over a long period of time so that it is possible to objectively judge the occurrence of an abnormality such as water leakage and the temporary difference in the consumption of a large amount of water. desirable. Therefore, the present application has proposed a device including a magnetic recording medium such as a memory card and capable of collecting a water pressure detection signal as measurement data for a long time (Japanese Patent Application No. 3-59181).

When the hydraulic gradient of the water distribution pipe system is obtained using such a device, first, the water pressure actual measurement data at a plurality of measurement points of the water distribution pipe system is output for each point. Then, actual measurement data at the same time between points is sequentially selected from a large number of data, and this is converted into head data respectively to calculate the head loss, and the hydraulic gradient is calculated by adding the piping conditions. It was

[0004]

In the above-mentioned prior art, a great deal of labor and time were spent to select the data of a predetermined date and time from among a large number of measured water pressure data, and the workability was extremely poor. Also, if the hydraulic head and the hydraulic gradient are obtained for each time and they can be compared, it is possible to easily grasp the change over time in the water distribution situation, but it takes a long time to calculate as described above, which is inconvenient. Yes, and the hydraulic gradients at different times could not be displayed automatically and simultaneously.

The present invention has been made in view of the above problems of the prior art, and an object thereof is to measure a hydraulic gradient between a plurality of measurement points of a water distribution pipe system. It is an object of the present invention to provide a hydraulic gradient management method capable of automatically calculating and outputting the hydraulic gradients and simultaneously displaying and outputting a plurality of hydraulic gradients for different times.

[0006]

In order to solve the above-mentioned problems, the hydraulic gradient management method of the present invention uses a hydraulic pressure measurement data file recorded at a computer recording medium at a plurality of points of a water distribution system, By reading at least the measurement date and time data, water pressure actual measurement data and ground height of at least two measurement points respectively, and inputting the pipe length data between the points and the desired date and time data from the keyboard, the water pressure actual measurement data at the input date and time can be obtained. It is characterized in that the head loss and the hydraulic gradient between the points at the input date and time are calculated, and are displayed and output while being converted into the head data.

Further, at least the measurement date / time data, the water pressure actual measurement data and the ground height of at least two measurement points are read from the water pressure measurement data files recorded at a plurality of points of the water distribution system recorded on the recording medium of the computer, By inputting the desired date and time data from the keyboard, the measured water pressure data at the input date and time is converted to head data, and the maximum and minimum values of the head loss between the points at the input date and time are searched,
The feature is that these are displayed and output.

[0008]

The difference between the date and time data input from the keyboard and the measurement start time data in the measurement data file is divided by the sampling interval data. When the result is N, the water pressure measurement data is recorded Nth from the beginning. The existing data is used as the water pressure data at that time. The water pressure data is converted to the ground head, and the head loss and hydraulic gradient between each point are calculated and displayed.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the distribution pipe system of the present embodiment has a distribution pipe line 2 arranged in series from the distribution reservoir 1 in series, and the distribution pipe 2 is branched in the middle of this distribution pipe line to a branch pipe (not shown). There are multiple bifurcation points.

In such a system, water pressure is measured with arbitrary branch points 011, 015, 017 and 019 on the water distribution line 2 as measurement points. The ground height of each measurement point is 109.8m at point 011 and 0 at point.
15 is 105.0 m, point 017 is 101.0 m,
Point 019 is 98.0m. In addition, the extension (length of the conduit) between each measurement point is point 011-015.
Distance between 1500m, point between 015-017 is 700
m, 800 m between points 017 and 019, and they are arranged by using pipe lines of φ = 150 mm, φ = 100 mm and φ = 75 mm, respectively. The flow velocity coefficient of the pipelines can be set to a desired numerical value as appropriate, but in this embodiment, all pipelines C = 1.
It was set to 10.

FIG. 2 shows an example of the structure of a measurement data file recorded when water pressure is measured using the water pressure recording device described above. This device is a single measurement, [point number], [measuring location], [machine number], [water pressure gauge measurement scale], [sampling interval], [measurement start date],
Various information such as [measurement start time], [ground height], and [water pressure actual measurement data] are recorded in a memory card.

FIG. 3 shows the hardware configuration of the hydraulic gradient management method of the present invention. In the figure, 11 is a computer main body having a built-in hard disk, 12 is a CRT display, 13 is a keyboard, and 14 is a printer.
The measurement data files recorded at the measurement points are recorded on the hard disk for each file.

FIG. 4 shows the configuration of data processing of the hydraulic gradient management method of the present invention. In the figure, S1 and S2 are steps for setting files and data for data processing, respectively. From the measurement data files recorded on the hard disk in S1, select measurement data files of a plurality of points for which the hydraulic gradient is obtained. Then, in S2, the day and time for calculating the hydraulic gradient are set.

When the time is set in S2, the difference between the data at the set time and the [measurement disclosure time] data in each measurement data file selected in S1 is divided by the [sampling interval] data. When the result is N (integer), the Nth recorded data from the beginning of the [water pressure measured data] becomes the water pressure value at the set time, and this data is read into the data processing area of the computer main body 11 at any time. , Is supposed to process. Further, the date setting is displayed and output in a table and a graph together with the processing result.

The measurement point can be selected from arbitrary measurement points on a single continuous pipe of the water distribution pipe system. When selecting a file in S1, the measurement data file recorded in the hard disk is selected. It is preferable to display the measurement points (place names) of each file, the measurement date and time, the file name, etc. as index information on the CRT monitor 12 so that the history at the time of measurement can be discriminated. Further, when setting the time in S2, it is preferable to display different settable time ranges depending on the selection of the file.

In this embodiment, the above points 011 and 01
It is assumed that the measurement data files of 5, 017 and 019 are selected and set so as to obtain the hydraulic gradient at four different times.

Next, steps S3 to S7 are steps for calculating the hydraulic gradient, in-pipe flow rate and the like from the selected measurement data file and outputting the calculation results in a table and a graph.

The procedure for calculating the hydraulic gradient and the like will be described with reference to the flow rate / velocity calculation table shown in FIG. FIG. 6 shows each point and the water distribution status between the points at the date and time set in S2. In the figure, the extension of the pipe line between each point and the pipe diameter are the data input in advance from the keyboard 13 and the flow velocity coefficient. The in-pipe flow rate is data in which when some data is input from the keyboard 13, the other data is automatically calculated and output.

Here, the flow velocity coefficient is C, the pipe diameter is D (mm),
If the hydraulic gradient is I (0/00, per millimeter), the pipe flow rate W
(L / sec) is calculated by the following equation (1). W = 0.27853 ・ C ・ 1000 ・ (D / 1000) ^2.63・ (I / 1000) ^0.54 (1)

The above-ground water head is obtained by retrieving and extracting the data corresponding to the set time from the [water pressure actual measurement data] of the measurement data file and converting this into water head data. This head above ground is added to [ground height] data also obtained from the measurement data file to calculate the hydraulic head, and the head between points is compared and subtracted to obtain the head loss.

Here, the loss head is N (m) and the extension is H
(M), the hydraulic gradient I (0/00) can be calculated by the following equation (2). I = (N / H) · 1000 (2)

Further, the flow coefficient C between each point or the flow rate in the pipe is calculated from the above (1) based on the calculated hydraulic gradient I and the pipe diameter data D input in advance. Then, the outflow amount of the distribution water flowing into the branch pipe (node outflow amount) at each point is obtained from the calculated difference between the in-pipe flow rates. These calculation results are output as calculation data in a table or a graph as needed.

In this embodiment, as shown in FIG. 6, points 011 to 0 indicate the above-ground water head at the set time (8:00).
19.61 (m) and 19.61 respectively at 19 points
(M), 18.43 (m) and 19.22 (m) were measured, so the hydraulic head at each point was 129.41.
(M), 124.61 (m), 119.43 (m), 1
It becomes 17.22 (m). Therefore, the hydraulic gradient is 3.
It becomes 20 (0/00), 7.39 (0/00), 2.77 (0/00).

Since the flow velocity coefficient is set to C = 110, the flow rate in the pipe between each point is 9.38 (L / L).
sec), 5.08 (L / sec), 1.40 (L / s)
ec), and the nodal outflow is 4.3 from the difference between these values.
It becomes 0 (L / sec) and 3.67 (L / sec). It is calculated similarly at other set times.

At S3, data necessary for calculation of extension, pipe diameter, etc. are inputted, and the hydraulic head and hydraulic gradient, flow rate between each point or flow velocity coefficient are automatically calculated by the above-mentioned procedure, and this is shown in FIG. As shown in FIG. 6, it is a step of tabulating for each set time, displaying and outputting on the CRT monitor 12, or printing out from the printer 14.

As shown in FIG. 7, S4 is a line graph showing the change of the hydraulic head with respect to the extension at each set time, and CR
This is a step of displaying and outputting on the T monitor 12 or printing out from the printer 14. In the figure, Ia to Id are hydraulic gradient lines at each set time, and R is a line representing the ground height. In this way, the change of the hydraulic head and the change of the hydraulic head with time can be easily grasped by collectively displaying them in a graph for easy viewing.

S5 is a step of storing the measurement data file selected in S1 and S2 as a file of the table of FIG. 6 on the hard disk or reading the stored table file, and S6 is the measurement data selected in S1 and S2. In this step, the file or the table file read in S5 is directly printed out as a table or a graph from the printer 14. The tables and graphs to be printed are those shown in FIGS. 6 and 7,
The hydraulic gradient calculation table shown in FIG. 8 or a diagram combining the calculated flow rate distribution chart and the hydraulic gradient chart shown in FIG. 9 is appropriately selected and output.

Step S7 is a step of retrieving and outputting the maximum and minimum values of the head loss at a predetermined date and time from the measurement data file selected in S1. The head loss is calculated by the procedure described above, and the calculated results are compared and calculated to obtain the maximum value and the minimum value. As shown in FIG.
It is displayed on the monitor 12 together with the measurement time.

In this embodiment, a floppy disk or other recording medium can be used in place of the hard disk, and the number of points to be selected, the type of data to be output on a table or graph, their layout, etc. It can be set appropriately.

[0030]

As described above, according to the hydraulic gradient management method of the present invention, a measured data file is used to automatically calculate a hydraulic gradient between a plurality of points of a water distribution pipe system and display it. It is possible to improve the efficiency of the measurement data processing operation. Since the hydraulic gradients at multiple times can be displayed and output at the same time, changes over time in the hydraulic head and hydraulic gradient can be easily grasped, and it is quick and appropriate for maintaining and managing the water distribution system. It can be used as a judgment material for performing treatment.

[Brief description of drawings]

FIG. 1 is a system diagram showing an example of a water distribution pipe system to which the present invention is applied.

FIG. 2 is a diagram showing a configuration example of a measurement data file recorded in a water pressure recording device.

FIG. 3 is a diagram showing a hardware configuration of the present invention.

FIG. 4 is a diagram showing a configuration of data processing of the present invention.

FIG. 5: CR of index information of measurement data file
It is an example of a screen layout when displaying on a T monitor.

FIG. 6 is an example of a table edited and output according to the present invention,
3 is a flow rate / velocity coefficient calculation table.

FIG. 7 is an example of a graph edited and output according to the present invention, and is a hydraulic gradient diagram.

FIG. 8 is another example of a table edited and output by the present invention, which is a hydraulic gradient calculation table.

FIG. 9 is another example of a graph edited and output according to the present invention, which is a calculated flow rate distribution chart.

FIG. 10 is an example of a screen layout when displaying a head loss on a CRT monitor.

[Explanation of symbols]

 1 distribution reservoir 2 distribution pipeline

Claims (2)

[Claims] 1. At least measurement date / time data, water pressure actual measurement data, and ground height of at least two measurement points are read from a water pressure measurement data file recorded at a plurality of points of a water distribution system recorded on a recording medium of a computer, respectively. By inputting the pipe length data between the points and the desired date and time data from the keyboard, the measured water pressure data at the input date and time is converted into head data, and the head loss and hydraulic gradient between the points at the input date and time are converted. Is calculated, and these are displayed and output. A hydraulic gradient management method characterized by the above. 2. At least measurement date / time data, water pressure actual measurement data and ground height of at least two measurement points are read from a water pressure measurement data file recorded at a plurality of points of a water distribution system recorded on a recording medium of a computer, respectively. By inputting the desired date and time data from the keyboard, the measured water pressure data at the above input date and time is converted to water head data, and the maximum and minimum values of the head loss between the points at that input date and time are searched and displayed. A hydraulic gradient management method characterized by being output.