JPH07198431A - Flowmeter - Google Patents

Abstract

PURPOSE:To accurately measure the flow rate of a fluid such as drain and rainwater flowing in a sewer and a conduit in a wide range. CONSTITUTION:In the instrument for measuring the flow rate of a fluid such as drain and rainwater flowing in a sewer and a conduit, a waterstop 3 with an external shape matched to the shape of the sewer and the conduit is provided at the sewer 1 and the conduit 2, a plurality of holes where the fluid can be introduced and flowmeters 4a-4e can be mounted are provided in the vertical direction at the waterstop, the flowmeters are mounted to the holes, and the fluid is introduced into each flowmeter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow rate measuring device for measuring the flow rate of a fluid such as sewage or rainwater flowing through a pipe or open channel, and particularly, to measure the flow rate of a fluid with high accuracy from a small flow rate to a large flow rate The present invention relates to a flow rate measuring device made possible.

[0002]

2. Description of the Related Art Conventionally, as a method for measuring the flow rate of a fluid such as sewage or rainwater flowing through a pipe or open channel, for example, FIG.
As shown in FIG. 0, the permeation bolus flume (hereinafter referred to as PBF) is used in combination with a velocity meter 11 and a level meter, or as shown in FIGS. A general measurement method uses a total of 12 and an anemometer 11. In addition, in FIG. 11, 13 is an installation pit and 14 is a pipeline.

Here, the PBF is a system in which a water stop plate is provided in a pipe or open channel to allow a fluid such as sewage or rainwater to flow into the PBF main body, and the PBF main body has a shape similar to a kind of weir flowmeter. This is a method of measuring the flow velocity and level of the fluid as it passes through the throttled portion of the PBF body and measuring it as the flow rate.

However, in such a measuring method using both the velocity meter 11 and the level meter, the sensor used for measuring the velocity and the water level is an ultrasonic wave, and in this method, the flow rate of the fluid is measured with high accuracy. Is difficult to do.

Further, even with the measuring method using both the ultrasonic level meter 12 and the velocity meter 11, it is difficult to measure the flow rate of the fluid with high accuracy. The reason for these difficulties is that ultrasonic waves are used in the measurement method, so it is theoretically difficult to accurately measure the fluid level and flow velocity.Therefore, it is possible to accurately measure fluids such as sewage and rainwater. It is impossible to do. Especially in sewage and rainwater, floating matter flows, air bubbles are mixed, and there are many conditions that block ultrasonic waves, and the measurement problems due to ultrasonic waves are taken into consideration. At present, there is a limit to high-precision measurement.

However, in order to measure the current flow rate of sewage or rainwater, it is necessary to install it in a pipe or open channel in the pit, and the only way to enter and exit the pit is to use a manhole. In addition, the manhole generally has an entrance and exit diameter of 600 mm.
There is a problem that the manhole cannot be passed through because the external dimensions are large to install a flowmeter with the same diameter as the PBF.

Therefore, since PBF can be decomposed,
It has a great advantage that it can be installed in the pit after passing through the manhole and can be installed with a sensor for pipe culvert or open channel larger than 600mm diameter of the manhole. .

Therefore, in order to measure the flow rate of a fluid such as sewage or rainwater flowing through a pipe or open channel, a flow meter for measurement is attached to a pit provided in the middle of the pipe or open channel. Is customary. The manhole is used to enter and exit the pit.

Therefore, the size of the manhole is generally standardized, and the hole gauge is usually 600 mm.
There is also a special one having a diameter of 900 mm. It is difficult to install an integral type flow meter that measures the flow rate of sewage or rainwater unless it is of a size that allows access to and from the manhole. However, this does not apply to new construction, but the number of new pits is limited in Japan where sewage facilities are widely used. Since the PBF and the like that can be used in the past because it can go in and out of the manhole, the flowmeter is disassembled as described above, and the manhole is passed through the pit to be reassembled.

However, as described above, the accuracy of flow rate measurement is poor and not satisfactory. Further, recently, an electromagnetic flow meter for measuring the flow rate of fluid of sewage or rainwater in a pipe or open channel has been developed, but the size of the manhole as described above remains a problem. That is, it is
The main size of pipes and open culverts is more than 1000 mm when it becomes a main line, so even if the electromagnetic flowmeter is manufactured in a size that matches the size of the pipe or open pipe, it will not enter through the manhole. Is a big problem. In particular, the integrated flowmeter is a flowmeter that uses an electromagnetic type, and it is a product that cannot be disassembled, although it is general that the inside of the measuring pipe is formed into a cylindrical shape with an insulating material or the like to guide the flowrate. On the other hand, the measurement accuracy is
Although it is known to be several steps better than the PBF,
I am suffering from the above problem.

Therefore, in order to solve these problems,
An electromagnetic flowmeter of a size that can enter and leave the manhole,
It may be possible to attach it to a pipe or open channel with a water stop plate. However, depending on the flow rate of sewage or rainwater, a flow meter large enough to pass through a manhole has a small full-scale value, so the full-scale flow rate will be exceeded, leaving a practical problem. . As a result, it is difficult to measure the flow rate of fluid such as sewage and rainwater from a small flow rate to a large flow rate.

[0012]

As described above, in the conventional flow rate measuring method, the flow rate of a fluid such as sewage or rainwater flowing through a pipe or open channel is measured with high accuracy from a small flow rate to a large flow rate. There was a problem that it was difficult.

An object of the present invention is to provide an extremely reliable flow rate measuring device capable of highly accurately measuring the flow rate of a fluid such as sewage or rainwater flowing through a pipe or open channel from a small flow rate to a large flow rate. To do.

[0014]

As described above, in the conventional flow rate measuring method, the flow rate of a fluid such as sewage or rainwater flowing through a pipe or open channel is measured with high accuracy from a small flow rate to a large flow rate. There was a problem that it was difficult.

An object of the present invention is to provide an extremely reliable flow rate measuring device capable of highly accurately measuring the flow rate of a fluid such as sewage or rainwater flowing through a pipe or open channel from a small flow rate to a large flow rate. To do.

[0016]

In order to achieve the above object, in a flow rate measuring device for measuring the flow rate of a fluid such as sewage or rainwater flowing through a pipe or open channel, an invention corresponding to claim 1 Then, a water stop plate having an outer shape corresponding to the shape of the pipe or open conduit is provided in the pipe or open conduit, and a hole portion into which the fluid can be introduced and the flowmeter can be attached is provided in the water stop plate. Plural locations are provided in the vertical direction, flowmeters are attached to the respective holes, and the fluid is introduced into the respective flowmeters.

Further, in the invention corresponding to claim 2, in particular, the heights of the respective hole portions are made to intersect with each other. Further, in the invention corresponding to claim 3, a flow meter having an outer shape corresponding to the shape of the pipe or the open conduit is attached to the pipe or the open conduit, and the fluid is introduced into the flow meter. ing.

In the invention according to claim 4, the flowmeter according to claim 3 is constituted by a plurality of flowmeters so as to match the shape of the pipe or the open channel.
Furthermore, in the invention corresponding to claim 5, in the flow rate measuring device corresponding to claim 1 or claim 4, the flow rate is calculated and output so that the sum of the instructions of each flow meter is the actual flow rate. One converter is added.

Further, in the invention corresponding to claim 6, a water stop plate having an outer shape corresponding to the shape of the water pipe or the open drain is provided in the water pipe or the open drain, and the fluid is introduced into the water stop plate. In addition, a plurality of flowmeter holes to which a flowmeter can be attached are provided in the vertical direction, and a hole with an inner diameter that is approximately the same as the inner diameter of the flowmeter hole is provided on the water stop plate from each flowmeter hole. The flowmeters are provided at positions separated from each other in the horizontal direction, the flowmeters are attached to the respective flowmeter holes, and the fluid is introduced into the respective flowmeters.

Here, in the invention corresponding to claim 7, for each flow meter and hole portion provided at the same height in the water stop plate corresponding to claim 6, the indication value by the flow meter and the hole portion. Calculate the flow rate value at the relevant height by multiplying it by the value obtained by adding the number of holes for the flow meter, and add the flow rate values calculated for each of these same heights to obtain the actual flow rate. One converter is added to calculate and output the flow rate.

The invention according to claim 8 provides a fluid discharge hole in the water shut-off plate corresponding to any one of claim 1, claim 2, claim 6 or claim 7, and A lid member for zero static water adjustment is detachably attached to the fluid discharge hole.

[0022]

Therefore, first, in the flow rate measuring device of the invention corresponding to claims 1 and 5, a water stop plate is provided in the pipe or open channel, and holes are vertically provided at a plurality of locations in the water stop plate. If the flow rate of the fluid is low, that is, if the flowmeter is installed in these holes, and the fluid such as sewage or rainwater is guided inside the flowmeter, that is, the lower hole provided in the water stop plate When the fluid flows only to the part, only the instruction of the lower flow meter is output as it is, and when the flow rate of the fluid increases, that is, the fluid flows to the lower and upper holes of the water stop plate. In this case, the sum of the instruction from the lower flow meter and the instruction from the upper flow meter is output so as to obtain the actual flow rate, and the fluid flow rate is measured with high accuracy from a small flow rate to a large flow rate. be able to.

By making the heights of the respective holes intersect with each other, the flow rate of the fluid can be continuously measured from a small flow rate to a large flow rate. on the other hand,
In the flow rate measuring device of the invention corresponding to claim 3 and claim 5, the outer shape of at least one flow meter itself is used to guide a fluid such as sewage or rainwater into the inside of the flow meter. Thus, the flow rate of the fluid can be measured with high accuracy from a small flow rate to a large flow rate in the same manner as described above.

Further, in the flow rate measuring device of the invention corresponding to claim 6 and claim 7, the pipe or the open conduit is provided with a water stop plate having an outer shape corresponding to the shape of the pipe or the open conduit. The water stop plate is provided with a plurality of flow meter holes that allow the introduction of fluid and a flow meter can be attached in the vertical direction, and the water stop plate has a hole with an inner diameter that is approximately the same as the inner diameter of the flow meter hole. Is installed at a position horizontally separated from each flow meter hole, and a flow meter is attached to each flow meter hole so that fluid can be introduced into each flow meter. When the flow rate is low, that is, when the fluid flows only in the lower hole provided in the water blocking plate, only the instruction of the lower flow meter is output as it is, and when the fluid flow rate increases, that is, When fluid flows through the lower and upper holes of the water stop plate For each flowmeter and hole provided at the same height above and below, multiply by the value indicated by the flowmeter and the value obtained by adding the number of holes for the flowmeter to the number of holes. And the lower flow rate values are calculated, and the sum of the flow rate values calculated for each of the same heights is added to the output to obtain the actual flow rate, and the fluid flow rate is highly accurate from small flow rate to large flow rate. It is possible to perform the flow rate measurement only by providing one flow meter along the vertical direction, so that the configuration can be simplified.

Further, the invention corresponding to claim 8 is that a fluid discharge hole is provided in the water stop plate corresponding to any one of claim 1, claim 2, claim 6 and claim 7, and Since the lid member for zero static water adjustment is detachably attached to the fluid discharge hole, in addition to the action corresponding to claim 1, claim 2, claim 6 or claim 7, in the zero static water adjustment, By removing this lid member from the fluid discharge hole and attaching it to the flow meter, even if the flow meter is covered, the fluid will flow from the fluid discharge hole, so the flow of the fluid is not stopped, and the overflow due to the increase in the water level is prevented. It is possible to prevent it and secure the safety at the time of zero static water adjustment.

[0026]

EXAMPLE In the present invention, for example, a water stop plate having an outer shape corresponding to the shape of a pipe or an open channel is provided with a hole for a flow meter having a size capable of passing through an existing manhole and a maximum flow rate value in the vertical direction. The number (plurality) corresponding to the above is provided, the flowmeters are attached to the holes, and fluid such as sewage or rainwater is introduced into each flowmeter.

Here, since the number of holes is the number corresponding to the maximum flow rate of the fluid such as sewage or rainwater flowing through the pipe or open channel, it is possible to solve the above-mentioned problem by installing the flowmeter of the same size. become.

Further, by providing a hole for mounting the flow meter in the vertical direction on the water stop plate, when the flow rate of the fluid such as sewage or rainwater is small, the flow rate is measured only by the lower flow meter. However, if the flow rate of the fluid increases, the lower hole will be filled with fluid and will also flow into the upper hole, so add the instructions of the lower and upper flow meters. The flow rate can be measured, and the flow rate of the fluid can be continuously measured with high accuracy from a small flow rate to a large flow rate.

Embodiments of the present invention based on the above concept will be described below in detail with reference to the drawings. 1 is a perspective view showing the configuration of a flow rate measuring device according to a first embodiment of the present invention.

That is, as shown in FIG. 1, the flow rate measuring apparatus of this embodiment has a water stop plate having an outer shape corresponding to the shape of the conduit 1 or the conduit 2 in the conduit 1 or the conduit 2. 3 is provided,
In addition, a plurality of holes (five in this example) are provided in the vertical direction in the water stop plate 3 for introducing a fluid such as sewage or rainwater flowing through the pipe 1 or open pipe 2 and to which a flow meter can be attached. Further, high precision integrated electromagnetic flowmeters 4a to 4e each having a small diameter and capable of passing an existing manhole through these holes.
Are attached to introduce the fluid into the respective integrated electromagnetic flowmeters 4a to 4e.

In addition, each of the integral type electromagnetic flowmeters 4a to 4a
One converter (not shown) that calculates and outputs the flow rate so that the sum of the instructions of e is the actual flow rate is provided.
Further, the heights of the above-mentioned holes are made to intersect with each other.

Next, the operation of the flow rate measuring device of the present embodiment constructed as described above will be described. In FIG. 1, when the flow rate of the fluid such as sewage or rainwater flowing through the pipe 1 or the open channel 2 is small, that is, when the fluid flows only to the lower hole provided in the water stop plate 3, Only the instruction of the integrated electromagnetic flowmeter 4a is calculated and output as an actual flow rate by a converter (not shown).

When the flow rate of the fluid such as sewage or rainwater flowing through the pipe 1 or the open channel 2 increases, that is, when the fluid flows through the lower and upper holes provided in the water stop plate 3. , The sum of the instructions of the lower integrated electromagnetic flowmeter 4a and the instructions of the upper integrated electromagnetic flowmeters 4b to 4e is
A converter (not shown) outputs a calculation so as to obtain the actual flow rate.

As a result, the flow rate of the fluid can be measured with high accuracy from a small flow rate to a large flow rate. Further, in this case, by making the heights of the respective holes intersect with each other, the flow rate of the fluid can be continuously measured from a small flow rate to a large flow rate.

The integrated electromagnetic flowmeter 4a is as follows:
It is necessary to install a flow meter that can measure even if the fluid flows only in a part of the lower hole, and to be able to measure even if the fluid flows in the entire lower hole. Therefore, when the flow rate is such that the flow rate is from the lower side to the upper side hole portion, at the time when the upper integrated electromagnetic flowmeters 4b to 4e output the flow rate signal, the flow rate of both flowmeters 4a and 4b to 4e is increased. It is designed to add instructions.

As described above, in the flow rate measuring apparatus of this embodiment, the pipe 1 or the open conduit 2 is provided with the water stop plate 3 having an outer shape corresponding to the shape of the pipe 1 or the open conduit 2, This water stop plate 3
Introducing fluid such as sewage or rainwater flowing through the pipe 1 or open channel 2 and providing 5 holes in the vertical direction to which a flow meter can be attached, and pass through the existing manholes in each of these holes. Small-diameter, high-precision, integrated electromagnetic flowmeter 4
a to 4e are attached to introduce the fluid into each of the integrated electromagnetic flowmeters 4 and the actual flow rate is obtained by adding the instructions of the integrated electromagnetic flowmeters 4a to 4e. As described above, one converter for calculating and outputting the flow rate is provided, and the heights of the respective hole portions are crossed with each other.

Therefore, when the flow rate of fluid such as sewage or rainwater flowing through the pipe 1 or open channel 2 is small, the flow rate value flowing through the lower hole is attached to the lower electromagnetic hole. 4a only, and when the flow rate is large, each of the integrated electromagnetic flowmeters 4a-4 attached to the lower and upper holes
It is possible to measure the flow rate of the fluid with high accuracy by using e together.

Further, since the heights of the respective holes are made to intersect with each other, the flow rate of the fluid can be continuously measured from a small flow rate to a large flow rate. Further, as the flowmeter, since the small-diameter high-precision integrated electromagnetic flowmeters 4a to 4e capable of passing through the existing manhole are used, sewage and rainwater flowing through the pipe 1 and the open 2 When measuring the flow rate of the fluid, it becomes extremely easy to attach and measure the flowmeters 4a to 4e for measurement through the pits provided in the conduit 1 and the open conduit 2.

The present invention is not limited to the above embodiment, but can be implemented in the same manner as described below. (A) In the present invention, the number of holes provided in the water blocking plate 3 depends on the sizes of the pipe 1 and the open pipe 2, but the flowmeter uses a product of the same shape and size, 2, the water stop plate 3 is provided with two holes 3a as shown in FIG. 2, or the water stop plate 3 is provided with three or more hole parts (see FIG. 3). It is also possible to provide 3 b (6 in 3) and attach a flow meter to each hole to introduce fluid such as sewage or rainwater into the flow meter.

Also in this case, the heights of the respective holes must intersect with each other (ΔL in FIGS. 2 and 3).
Indicates a crossing portion), which enables continuous measurement of flow rates from a small flow rate to a large flow rate in the same manner as described above.

(B) In the above embodiment, the conduit 1 and the open conduit 2
Is provided with a water stop plate 3 having an outer shape corresponding to the shape of the conduit 1 or the open conduit 2, and the water stop plate 3 is attached to the conduit 1 or the open conduit 2.
Introducing a fluid such as sewage or rainwater flowing through the hole and providing a plurality of holes in the vertical direction to which the flowmeter can be attached, and the integrated electromagnetic flowmeters 4a to 4e are attached to the holes, respectively. The case has been described where the fluid is introduced into each of the integrated electromagnetic flowmeters 4a to 4e.
It is not limited to this.

That is, using the outer shape of the flow meter,
The fluid may be introduced into the flow meter. As an example of this case, for example, as shown in FIG. 4, one flowmeter 5 having an outer shape corresponding to the shape of the pipe 1 or the open conduit 2 is attached to the pipe 1 or the open conduit 2. , Which introduces a fluid into the flowmeter 5 (indicated by 6 in FIG. 4 is the inner diameter of the flowmeter 5), or, for example, as shown in FIG. 5, the shape of the conduit 1 or the open conduit 2. 7, a plurality of (two in FIG. 5) flowmeters 5 are provided to introduce a fluid into each of the flowmeters 5 (in FIG. 5, 6 is an inner diameter portion of the flowmeter 5). Is shown).

In this case as well, as in the case described above, one common converter is provided for each flow meter 5, and the sum of the instructions of each flow meter 5 is the actual flow rate. It is preferable to calculate and output the flow rate so that

(C) In the above embodiment, the case where an electromagnetic flow meter is installed as the flow meter has been described, but a flow meter of another type may be installed as the flow meter.

Next, a flow rate measuring device according to a second embodiment of the present invention will be described. FIG. 6 is a partial configuration diagram of the flow rate measuring device. The same parts as those in FIG. 1 are designated by the same reference numerals and detailed description thereof will be omitted, and only different parts will be described here.

That is, the apparatus of this embodiment is intended to simplify the configuration by reducing the number of electromagnetic flowmeters as compared with the apparatus shown in FIG. 1. Specifically, in comparison with the apparatus shown in FIG.
One electromagnetic flowmeter 4a for each same height in the water stop plate 3
4c is left and the others are omitted, and the short pipe 8 is attached to the hole instead of the electromagnetic flowmeters 4d and 4e which are omitted. It is preferable that the short pipe 8 has an inner diameter and a length that are substantially the same as those of the electromagnetic flow meter so that the flowability of the fluid is substantially equal to that of the electromagnetic flow meter.

Further, unlike the first embodiment, the converter (not shown) indicates for each electromagnetic flow meter and each short pipe provided at the same height on the water stop plate 3 by the electromagnetic flow meter. The flow rate value at the height is calculated by multiplying the value and the number of holes obtained by adding 1 (= the number of electromagnetic flow meters) to the number of the short tubes 8 and at the same height. It has a function of adding the calculated flow rate values to each other and outputting the total flow rate value as the addition result.

Here, a case where the water level is high and the flow rate is measured by all the electromagnetic flow meters 4a to 4c will be described.
Each of the electromagnetic flowmeters 4a to 4c sends the indicated value to the converter. The converter calculates the flow rate value for each of the N number of short pipes 8 and the electromagnetic flow meter provided at the same height in the water stop plate, as shown in the following equation (1).

Flow rate value at the same height = indicator value of electromagnetic flow meter × (number of short pipes N + 1) (1) That is, the converter sets the height in the water stop plate 3 to the lower part, the middle part and the upper part. The flow rate values are calculated as shown in the following equations (2) to (4).

Lower flow rate value F1 = instruction value of electromagnetic flow meter 4a × 1 (2) Middle flow rate value F2 = instruction value of electromagnetic flow meter 4b × 2 (3) Upper flow rate value F3 = electromagnetic The indicated value of the formula flow rate value 4c × 2 (4) Subsequently, the converter adds these flow rate values F1 to F3 to each other as shown in the following equation (5) to calculate the total flow rate value Fo, The total flow rate value Fo is output.

Total flow rate value Fo = sum of flow rate values for each height = F1 + F2 + F3 (5) As described above, according to the second embodiment, in the water blocking plate 3 with respect to the device shown in FIG. Since one electromagnetic type flowmeter 4a to 4c is left at the same height and the other is omitted, and the short pipe 8 is attached to the hole instead of the omitted electromagnetic type flowmeters 4d and 4e. The flow rate can be measured only by providing one flow meter along the vertical direction, and the configuration can be simplified in addition to the effect of the first embodiment.

Further, according to the second embodiment, the converter is
Set the reading of the electromagnetic flow meter for each same height (the number of short pipes +
1) Since the accurate flow rate value at the height is obtained by multiplying, it is possible to ensure the measurement accuracy when the configuration is simplified.

In the second embodiment described above, the height direction of the water blocking plate 3 is divided into three stages of upper part, middle part and lower part.
Not limited to this, even if the height direction of the water stop plate 3 is divided into an arbitrary number of stages and an electromagnetic flow meter and a short pipe are provided,
The present invention can be implemented in the same manner to obtain the same effect.

In the second embodiment described above, the case where the short pipe 8 is provided in each of the upper portion and the middle portion in the water blocking plate 3 has been described, but the present invention is not limited to this and the inside of the water blocking plate 3 is not limited to this. Even if a plurality of short pipes are provided in at least one of the upper portion and the middle portion, the present invention can be implemented in the same manner and the same effect can be obtained.

Further, in the second embodiment described above, the case where the short pipe 8 having a fluid flowability substantially equal to that of the electromagnetic flowmeter is provided has been described, but the present invention is not limited to this, and the short pipe 8 is omitted. Even if only the holes are provided and the converter executes a calculation in consideration of the difference in the easiness of fluid flow between the electromagnetic flowmeter and the holes, the same effects can be obtained by implementing the present invention in the same manner. be able to. This type of calculation is performed using the following equation (6) instead of equation (1), where n: m is the ratio of the ease of flow in the electromagnetic flow meter and the ease of flow in the hole. be able to.

Flow rate value at the same height = instruction value of electromagnetic flow meter × (number of holes N · m + n) (6) Next, regarding a flow rate measuring apparatus according to a third embodiment of the present invention. explain.

FIG. 7 is a perspective view schematically showing a partial structure of the flow rate measuring device. The same parts as those in FIG. 6 are designated by the same reference numerals and detailed description thereof will be omitted, and only different parts will be described here. . Note that, for convenience of explanation, in FIG. 7, the number and arrangement of the electromagnetic flowmeter and the holes are changed from those in FIG. 6.

In other words, the apparatus of this embodiment has the first and second
In the apparatus of the embodiment of the present invention, for example, when the electromagnetic flow meter 4b is covered to adjust the zero point when the water is still, the increase in the water level of the fluid flowing through the pipe or the open pipe is prevented. For example, a lid member 10 is detachably attached in advance to two holes 9 as fluid discharge holes provided at the same height as the electromagnetic flowmeter 4b in the water stop plate 3.

Here, when attaching the lid member 10 to the electromagnetic flow meter 4b, as shown in the perspective view of FIG. 8 and the sectional view taken along the line AA of FIG. The removed lid members are attached to both ends of the electromagnetic flow meter 4b. Therefore, by attaching the lid member 10, the electromagnetic flow meter 4b
Even if the fluid does not pass through, the fluid will pass through the hole 9 that is removed from the lid member 10, so that the static water zero adjustment can be performed while preventing the increase of the water level due to the damming of the fluid. .

As described above, according to the third embodiment, in addition to the constructions of the devices of the first and second embodiments, the water stop plate 3 is provided with the hole 9 for discharging the fluid. Since the lid member 10 of the flow meter for zero static water adjustment is detachably attached, in addition to the effects of the first and second embodiments, the lid member 10 can be removed from the hole 9 during zero static water adjustment. By attaching the flowmeter 4b to the flowmeter 4b so that the fluid can flow from the hole 9 even if the flowmeter 4b is covered, the flow of the fluid is not stopped,
It is possible to prevent the overflow due to the increase of the water level and to ensure the safety at the time of zero static water adjustment.

In the third embodiment described above, the case where the lid members 10 are attached to the two holes 9 has been described.
Not limited to this, even if the lid member is attached to only one hole and the other lid member is arranged in the vicinity of the pipe conduit or the open conduit, the present invention is similarly implemented and the same effect is obtained. You can In addition, the present invention can be modified in various ways without departing from the scope of the invention.

[0062]

As described above, according to the first to fifth aspects of the present invention, the pipe or the open conduit is provided with the water stop plate having an outer shape corresponding to the shape of the pipe or the open conduit. , In this water stop plate, there are provided a plurality of holes in the vertical direction where fluid can be introduced and a flow meter can be attached, each flow meter is attached to each hole, and the fluid is introduced into each flow meter. Or, to the pipe or open conduit, a flow meter having an outer shape corresponding to the shape of the pipe or open conduit is attached, and the fluid is introduced into the flow meter, and if necessary, Since one converter was added to calculate and output the flow rate so that the sum of the instructions of each flow meter would be the actual flow rate, fluid such as sewage or rainwater flowing through the pipe or open channel Highly reliable measurement of high and low flow rates from high to low Possible to provide a flow measuring device.

Further, according to the inventions of claims 6 and 7, a water stop plate having an outer shape corresponding to the shape of the pipe or open conduit is provided in the pipe or open conduit, and the water stop plate is A plurality of flow meter holes for introducing a fluid and to which a flow meter can be attached are provided in the vertical direction, and holes on the water stop plate that have approximately the same inner diameter as the inner diameter of the flow meter hole are provided for each flow meter. When the flow rate of the fluid is low by installing it at a position horizontally separated from the hole for the flowmeter, installing a flowmeter in each hole for the flowmeter, and introducing the fluid into each flowmeter. That is, when the fluid flows only to the lower hole provided in the water stop plate, only the instruction of the lower flow meter is output as it is, and when the flow rate of the fluid increases, that is, it is provided in the water stop plate. When the fluid flows through the lower and upper holes, the upper and lower holes are the same. For each flow meter and hole provided at the height, calculate the flow rate values above and below by multiplying the value indicated by the flow meter and the value obtained by adding the number of holes for the flow meter to the number of holes. Further, the sum of the flow rate values calculated for each of the same heights is calculated and output so as to be the actual flow rate, and the flow rate of the fluid can be measured with high accuracy from a small flow rate to a large flow rate, and Since it is possible to perform the flow rate measurement only by providing one flow meter along the vertical direction, it is possible to provide a flow rate measurement device that can simplify the configuration.

Further, according to the invention of claim 8, a fluid discharge hole is provided in the water stop plate according to any one of claim 1, claim 2, claim 6 and claim 7, and Since the lid member for zero static water adjustment is detachably attached to the fluid discharge hole, in addition to the effect of claim 1, claim 2, claim 6, or claim 7, the lid member is adjusted during zero static water adjustment. By removing the member from the fluid discharge hole and attaching it to the flow meter, even if the flow meter is covered, the fluid will flow from the fluid discharge hole, so the flow of the fluid is not stopped and the overflow due to the increase in the water level is prevented. It is possible to provide a flow rate measuring device that can ensure the safety at the time of zero static water adjustment.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a flow rate measuring device according to a first embodiment of the present invention.

FIG. 2 is a front view showing a configuration example of a water blocking plate (when there are two holes) in the embodiment.

FIG. 3 is a front view showing a configuration example of a water blocking plate (when there are three or more holes) in the embodiment.

FIG. 4 is a front view showing another embodiment of the flow rate measuring device according to the present invention.

FIG. 5 is a front view showing another embodiment of the flow rate measuring device according to the present invention.

FIG. 6 is a partial configuration diagram of a flow rate measuring device according to a second embodiment of the present invention.

FIG. 7 is a perspective view schematically showing a partial configuration of a flow rate measuring device according to a third embodiment of the present invention.

FIG. 8 is a perspective view showing a partial configuration of a flow rate measurement device at the time of zero adjustment of still water in the same embodiment.

FIG. 9 is a cross-sectional view taken along the line AA showing the partial configuration of the flow rate measuring device at the time of zero adjustment of still water in the example.

FIG. 10 is a perspective view showing an example of a conventional flow rate measuring method.

FIG. 11 is a perspective view showing another example of a conventional flow rate measuring method.

[Explanation of symbols]

1 ... Pipe channel, 2 ... Open channel, 3 ... Water stop plate, 3a, 3b ... Hole section,
4 ... Integrated electromagnetic flow meter, 5 ... Flow meter, 6 ... Inner diameter part of flow meter 5, 7 ... Shape of pipe 1 or open duct 2, 8 ... Short pipe, 9 ... Hole, 10 ... Lid member, 11 ... Velocity meter, 12 ... Ultrasonic level meter, 13 ... Installation pit, 14 ... Pipe line.

Claims (8)

[Claims] 1. A flow measuring device for measuring the flow rate of a fluid such as sewage or rainwater flowing through a pipe or an open conduit, wherein the pipe or the open conduit has an outer shape corresponding to the shape of the pipe or the open conduit. Providing a water stop plate having, the water stop plate is provided with a plurality of holes in the vertical direction into which the fluid can be introduced and to which a flow meter can be attached, and a flow meter is attached to each of the hole parts, respectively, A flow rate measuring device characterized in that a fluid is introduced into the flow meter of the above. 2. The flow measuring device according to claim 1, wherein the heights of the respective holes are made to intersect with each other. 3. A flow measuring device for measuring a flow rate of a fluid such as sewage or rainwater flowing through a pipe or an open drain, wherein the pipe or the open drain has an outer shape corresponding to the shape of the pipe or the open drain. A flow measuring device, characterized in that a flow meter having the same is attached to introduce a fluid into the flow meter. 4. The flow measuring device according to claim 3, wherein the flow meter is composed of a plurality of flow meters so as to match the shape of the pipe or the open channel. measuring device. 5. The flow rate measuring device according to claim 1 or 4, wherein one converter for calculating and outputting the flow rate such that the sum of the instructions of the respective flow meters is the actual flow rate. A flow rate measuring device comprising: 6. A flow measuring device for measuring a flow rate of a fluid such as sewage or rainwater flowing through a pipe or an open drain, wherein the pipe or the open drain has an outer shape corresponding to the shape of the pipe or the open drain. A water stop plate having is provided, wherein the water stop plate is provided with a plurality of flow meter holes into which the fluid can be introduced and a flow meter can be attached in the vertical direction, and the water stop plate has the flow meter hole part. A hole having an inner diameter substantially the same as the inner diameter of each of the flowmeters is provided at a position horizontally separated from each of the flowmeter holes, and a flowmeter is attached to each of the flowmeter holes, and the flowrate of each of the flowmeters is attached. A flow rate measuring device characterized in that a fluid is introduced into the meter. 7. The flow measuring device according to claim 6, wherein the flowmeter and the number of holes are provided for each of the flowmeters and holes provided at the same height in the water blocking plate. Calculate the flow rate value at the height by multiplying it by the value obtained by adding the number of holes for the flow meter, and add the flow rate values calculated for each of these same heights to obtain the actual flow rate. A flow rate measuring device comprising a converter for calculating and outputting a flow rate. 8. The flow rate measuring device according to claim 1, claim 2, claim 6 or claim 7, wherein the water stop plate is provided with a fluid discharge hole, and the flow meter has no static water. A flow measuring device, wherein a lid member for adjustment is detachably attached to the fluid discharge hole.