JP7597016B2 - Equipment - Google Patents

Description

The present invention relates to an instrument.

Dams hold back large volumes of water with their embankments. Inspections and monitoring are carried out daily using a variety of methods to detect any abnormalities or changes in the condition of the embankments.

One of these is the measurement of the amount of water leaking into the embankment. When measuring the amount of water leaking, the leaking water is collected in a water tank installed in an inspection gallery that is constructed inside the embankment as a monitoring passage, and the amount of water overflowing from the tank is measured. However, the leaking water in the inspection gallery contains impurities such as dissolved components of the concrete that makes up the embankment, and in order to accurately measure the amount of water overflowing from the tank, the tank needs to be cleaned regularly. Meanwhile, technologies for removing impurities from liquids such as water have been developed in various fields, and one example of this is known as disclosed in Patent Document 1.

Patent No. 5113873

However, cleaning the tanks must be done in a narrow inspection gallery, which is a heavy workload. Cleaning in summer and winter is particularly hard on workers.

In addition, dams are often built in mountainous areas, and it takes time for workers to get to the dams, so there is also a desire to reduce the frequency of visits.

Therefore, the present invention was made in consideration of these problems, and aims to reduce the workload involved in measuring the amount of water leakage in an inspection gallery.

To solve the above problems, an instrument is provided that is installed in an inspection gallery to measure the amount of water leaking into the dam's embankment, the instrument having a permeable filter, a filter member that receives the leaked water that flows from the outlet of a pipe through which the leaked water that has leaked into the embankment flows into a water tank of a leak measuring device that measures the amount of the leaked water, and an attachment member that attaches the filter member to the pipe so that the leaked water flows into the filter.

According to an embodiment of the present invention, the workload of measuring the amount of water leakage in an inspection gallery can be reduced.

FIG. 2 is a perspective view of a pipe 1 and a water leakage measuring device 10. 2 is a perspective view of the mounting member 30 and the frame 41. FIG. FIG. 4 is a perspective view of a filter material 42. FIG. FIG. 13 is a perspective view of the device 20 in the first modified example. FIG. 11 is a perspective view of the device 20 in the second modified example.

The following describes embodiments of the present invention with reference to the drawings. The embodiments described below are subject to various limitations that are technically preferable for implementing the present invention, but these limitations do not limit the scope of the present invention to the following embodiments and illustrated examples.

<How to measure leakage amount>
FIG. 1 is a diagram showing a state in which the amount of leakage water inside a levee body is measured using an instrument 20 according to this embodiment.

Water collection devices (not shown) are installed in multiple places inside the embankment. Any water leaking from inside the embankment is collected via piping 1 into a water tank 11 installed in the inspection gallery.

A notch 11A is formed in the water tank 11, and when the water level in the water tank 11 reaches the lower end of the notch 11A, water begins to flow out from the notch 11A.

At this time, the greater the amount of water flowing into the water tank 11 from the pipe 1, the higher the water level in the water tank 11 will be from the lower end of the notch 11A. Conversely, the less water flowing into the water tank 11 from the pipe 1, the closer the water level in the water tank 11 will be to the lower end of the notch 11A.

Therefore, by measuring the water level in the water tank 11, the amount of water leaking from the pipe 1 into the water tank 11 can be determined.

In this embodiment, the water level in the water tank 11 is measured using a measuring device 12, which will be described later.

The leaking water flowing through the pipe 1 from within the embankment contains various impurities (hereinafter, "impurities"), such as dissolved components of the concrete that makes up the embankment, particles such as sand, suspended matter such as algae and water blooms, bacteria, and microorganisms. When these impurities accumulate in the cutout portion 11A, they act to raise the water level in the water tank 11, making it impossible to accurately determine the amount of leaking water.

Therefore, in this embodiment, the device 20 is used to prevent impurities in the leaking water from accumulating in the notch 11A. This is explained in detail below.

<Piping, water leakage measuring device>
FIG. 1 is a perspective view of a pipe 1 and a water leakage measuring device 10 installed in an inspection gallery.

The pipe 1 is a pipe that guides water leaking into the inspection gallery to the water leakage measuring device 10. The pipe 1 is, for example, a metal pipe. The pipe 1 is arranged in a straight line near the water leakage measuring device 10 with its tip pointing downward from the horizontal. An outlet 2 is provided at the tip of the pipe 1. The outlet 2 is an opening through which the leaking water flows out of the pipe 1. The outlet 2 is in the shape of a cylinder that extends in a straight line along the extension direction of the pipe 1. An instrument 20 is attached to the pipe 1. The pipe 1 may be made of resin, wood, stone, or concrete.

The water leakage measuring device 10 is a device that measures the amount of water leakage. The water leakage measuring device 10 is equipped with a water tank 11, and is a device that determines the amount of water leakage from the water level of the leaking water stored in the water tank 11.

The leakage measurement device 10 according to this embodiment includes, as an example, a water tank 11, a measuring device 12, and a communication device 13.

The water tank 11 is a tank that stores leaked water. The water tank 11 is provided below the outlet 2, and stores the leaked water flowing out from the outlet 2 inside. The water tank 11 is, for example, a rectangular box shape with an open top. The water tank 11 has a notch 11A on one of its sides. The notch 11A is an outlet for leaked water in the water tank 11. The notch 11A is a triangular portion cut out from the top edge of the side.

The measuring device 12 is a device that measures the water level of the leaking water stored in the water tank 11. The measuring device 12 includes an ultrasonic generator 12A and a detector 12B.

The ultrasonic generator 12A is a device that generates ultrasonic waves. The ultrasonic generator 12A is provided above the water tank 11. The ultrasonic generator 12A generates ultrasonic waves toward the water surface of the leaking water stored in the water tank 11. The ultrasonic generator 12A is connected to the detector 12B and the communication device 13 so that they can communicate with each other. The ultrasonic generator 12A transmits a signal to the detector 12B when it generates ultrasonic waves.

The detector 12B is a device that detects ultrasonic waves. The detector 12B is provided near the ultrasonic generator 12A and above the water tank 11. The detector 12B detects ultrasonic waves emitted from the ultrasonic generator 12A and reflected by the water surface of the leaking water stored in the water tank 11. The detector 12B is connected to the ultrasonic generator 12A and the communication device 13 so that they can communicate with each other. The detector 12B detects the ultrasonic waves generated by the ultrasonic generator 12A.

Detector 12B also detects the distance from detector 12B to the water surface by measuring the time from when ultrasonic generator 12A generates ultrasonic waves to when it detects the ultrasonic waves reflected from the water surface. The distance from the bottom plate of water tank 11 to detector 12B is measured in advance, and detector 12B detects the water level of the leaking water stored in water tank 11 by subtracting the distance from detector 12B to the water surface from that distance. Detector 12B then transmits the detected water level data of the leaking water to communication device 13.

The communication device 13 is a device that transmits and receives data to and from a computer (not shown) that is provided outside the inspection gallery. The communication device 13 is communicatively connected to the ultrasonic generator 12A and the detector 12B. The communication device 13 is also communicatively connected to a computer outside the inspection gallery, such as a monitoring center, by wireless or wired connection. Thus, the communication device 13 receives water level data of the leak from the detector 12B and transmits it to the computer outside the inspection gallery.

Here, a method for measuring the amount of leaking water will be described. The amount of leaking water flowing into the water tank 11 is the same as the amount of leaking water flowing out from the notch 11A. However, since the notch 11A is a triangular notch, as the water level in the water tank 11 increases, the amount of leaking water flowing out from the notch 11A increases. Therefore, by measuring the relationship between the water level of the leaking water stored in the water tank 11 and the amount of leaking water flowing out from the notch 11A at that water level in advance, the amount of leaking water can be calculated from the water level of the leaking water stored in the water tank 11. In other words, the leaking water measuring device 10 indirectly measures the amount of leaking water by measuring the water level of the leaking water stored in the water tank 11.

<Equipment>
The device 20 is attached to the pipe 1 and removes impurities from the leaking water flowing down from the outlet 2. The device 20 includes a mounting member 30 and a filtering member 40 (see FIG. 4).

The mounting member 30 is a member that attaches the filter member 40 to the pipe 1 so that the leaking water flows down into the filter material 42 described later. As shown in FIG. 2, the mounting member 30 is tubular. The mounting member 30 is, for example, a metal member. The inner diameter of the mounting member 30 corresponds to the outer diameter of the outlet 2. Therefore, the mounting member 30 can be attached coaxially with the outlet 2 by inserting the outlet 2 into the tube. Note that the mounting member 30 shown in FIG. 2 etc. is cylindrical in shape to match the cross-sectional shape of the pipe 1, but if the cross-sectional shape of the pipe 1 is square, the mounting member 30 may be rectangular in shape. The mounting member 30 may also be made of resin or wood.

In this way, the inner diameter of the mounting member 30 corresponds to the outer diameter of the outlet 2, so the mounting member 30 can be easily attached to the outlet 2.

In addition, because the mounting member 30 and the filter member 40 are continuous, there is no gap between the two members. Therefore, the water leaking out from the outlet 2 flows down into the filter member 40 without leaking.

The filter member 40 is a member that receives the leaked water flowing down from the outlet 2. The filter member 40 includes a frame 41 and a filter material 42.

The frame 41 is a member for holding the filter material 42 in a semi-cylindrical shape. The frame 41 is, for example, a metal member. As shown in FIG. 2, the frame 41 is formed by combining a member 41A in which a rod material is formed into a rectangular shape and a member 41B in which a rod material is formed into a semicircular arc shape having approximately the same diameter as the tube of the mounting member 30. The frame 41 is formed, for example, by attaching a plurality of members 41B to the member 41A at a predetermined interval in the long side direction of the member 41A. The plurality of members 41B are attached to both ends of the long side of the member 41A and between them. Furthermore, the plurality of members 41B are attached so that the ends of the respective arcs are connected to different long sides of the member 41A and perpendicular to the member 41A. The frame 41 thus constructed is attached so that one of the two short sides of the member 41A is in contact with the end of the mounting member 30. Therefore, the mounting member 30 and the frame 41 are continuous. The frame 41 is configured so that the long side of member 41A extends along the cylindrical axis of the mounting member 30, and the axis of member 41B extends along the cylindrical axis of the mounting member 30.

The frame 41 may be constructed by bending a number of wires to create members corresponding to the rectangular member 41A and the semicircular arc member 41B. Alternatively, the frame 41 may be constructed by bending a metal net into a semi-cylindrical shape. The frame 41 may also be made of resin or wood.

The filter material 42 is a member that removes impurities from leaking water. The filter material 42 has water permeability. The filter material 42 is, for example, a fine mesh net. As shown in FIG. 3, the filter material 42, which is molded to match the shape of the frame 41, is attached to the frame 41 by adhering it with an adhesive, supporting it with a string-like member, and clamping it with a clip. Then, as shown in FIG. 4, the filter material 42 is attached to the mounting member 30 along the frame 41 with no gap between them, forming the side 43 of the filter member 40. The side 43 is formed along the member 41B, which is coaxial or parallel to the cylindrical axis of the mounting member 30, and is therefore a half cylinder with the same axis or parallel axis as the cylindrical axis of the mounting member 30. In addition, the side 43 is continuous with the side of the mounting member 30 because the filter material 42 is attached to the frame 41 with no gap between them. The filter material 42 may be a metal net or a non-water-soluble paper filter.

By attaching such a device 20 to the outlet 2, impurities are removed from the leaking water, making it less likely for impurities to flow into the water tank 11.

<How to use the equipment>
A method of using the device 20 will be described. The device 20 is attached to the pipe 1. Leaking water containing impurities flows down from the pipe 1 to the device 20 through the outlet 2. When the leaking water reaches the side surface 43, it passes through the filter material 42 and flows into the water tank 11 arranged below. On the other hand, impurities cannot pass through the filter material 42 and are removed from the leaking water.

When the device 20 is used continuously, impurities gradually accumulate in the portion of the filter material 42 through which the leaking water has passed. Even in such a case, the side surface 43 of the filter material 42 is formed with a certain length along the member 41B in the same axial direction as the cylindrical axis of the mounting member 30, so that the leaking water flowing down from the outlet 2 passes through the portion of the filter material 42 where impurities have not accumulated and flows into the water tank 11.

Therefore, with the device 20 according to this embodiment, even if part of the filter material 42 becomes clogged, the leaking water passes through the unclogged part of the filter material 42, so impurities can be removed from the leaking water for a long period of time. This reduces the frequency with which the device 20 needs to be replaced.

Furthermore, when impurities flow into the water tank 11, the impurities adhere and accumulate, causing an unpleasant odor and corroding the water tank 11. This makes it necessary to clean the water tank 11 periodically. However, by using the device 20, it is possible to remove impurities contained in the leaking water. This makes it difficult for impurities to flow into the water tank 11, making the water tank 11 less likely to become dirty. This makes it possible to reduce the frequency with which the water tank 11 needs to be cleaned, and reduces the maintenance burden of the water leakage measurement device 10.

In addition, if impurities adhere to the notch 11A, the amount of leakage cannot be measured correctly, so the notch 11A also needs to be cleaned. However, by using the device 20, impurities are less likely to flow into the water tank 11, and as a result, impurities are less likely to adhere to the notch 11A, so the frequency with which the notch 11A needs to be cleaned can be reduced.

In addition, since dams are often constructed far from urban areas, it takes time for workers to travel to the dam. For this reason, it has been desirable to reduce the frequency of maintenance of the water leakage measurement device 10. As described above, by using the device 20, the frequency of maintenance of the water leakage measurement device 10 is reduced, thereby reducing the burden on workers.

＜Effects＞
In the above embodiment, the instrument 20 installed in the inspection gallery to measure the amount of water leaking into the dam's embankment has a water-permeable filter material 42 and is equipped with a filter member 40 that receives leaking water flowing from the outlet 2 of the pipe 1 through which the leaking water that has leaked into the embankment flows into the water tank 11 of the leak measuring device 10, which measures the amount of water leaking, and an attachment member 30 that attaches the filter member 40 to the pipe 1 so that the leaking water flows into the filter material 42.

When the device 20 is attached to the pipes 1 in the inspection gallery, the leaking water flows down into the filter material 42, which removes impurities from the leaking water. This makes it harder for impurities to flow into the water tank 11, so impurities are less likely to accumulate in the water tank 11. As a result, it is possible to reduce the frequency of cleaning the water tank 11, and the workload of measuring the amount of leaking water in the inspection gallery can be reduced.

And by making it possible to reduce the frequency of cleaning the water tank 11, it is also possible to reduce the number of times that workers need to visit the dam. This reduces the workload of measuring the amount of water leakage in the inspection gallery.

Furthermore, because impurities are removed by the fixture 20 and are less likely to flow into the water tank 11, maintenance work for the water leakage measurement device 10 is mainly performed on the fixture 20. Here, maintenance of the fixture 20 requires replacing or cleaning only the filter material 42, or replacing or cleaning the entire fixture 20, which is easier than cleaning the water tank 11. This reduces the workload of leak measurement work in the inspection gallery.

The device 20 according to this embodiment is provided with a mounting member 30 having a cylindrical shape with an inner diameter corresponding to the outer diameter of the pipe 1 that extends so that the outlet 2 faces downward from the horizontal, and is attached to the pipe 1 by inserting the outlet 2 into the cylinder, and a filtering member 40 having a side surface 43 that is continuous with the cylindrical side surface of the mounting member 30, and having a cylindrical axis aligned with the cylindrical axis of the mounting member 30, the side surface 43 of the semi-cylinder being made of a filter material 42.

By using the mounting member 30 configured in this way, the device 20 can be easily attached to the pipe 1. In other words, the installation work of the device 20 is made easier and the work time is shortened. This further reduces the workload of the leakage measurement work in the inspection gallery.

In addition, in this embodiment, the filter member 40 has a side surface 43 that is continuous with the side surface of the tube of the mounting member 30, and is in the shape of a half cylinder with a tube axis aligned with the tube axis of the mounting member 30, and the side surface 43 is composed of the filter material 42, so that the filter material 42 extends along the tube axis. With this configuration, the area of the filter material 42 is increased, so the effect of removing impurities by the filter material 42 is maintained for a long period of time. In other words, the instrument 20 can be used for a long period of time, so the frequency of replacement of the filter material 42 or the instrument 20 is reduced. This further reduces the workload of the leakage measurement work in the inspection gallery.

In addition, in the device 20 according to this embodiment, the length of the filtering member 40 in a direction parallel to the cylindrical axis is longer than the length in a direction perpendicular to the cylindrical axis.

Because the leaking water flowing from the outlet 2 flows down in a direction parallel to the cylinder axis, the filter material 42 is likely to become clogged in the direction parallel to the cylinder axis. On the other hand, in the filter member 40 of this embodiment, the filter material 42 is arranged long in a direction parallel to the cylinder axis. As a result, the leaking water can easily pass over the clogged parts of the filter material 42 without changing the flow direction and reach the parts where the filter material 42 is not clogged. This reduces the possibility of the leaking water accumulating inside the filter member 40 or overflowing from the filter member 40.

<Modification>
The modifications described below may be applied in combination.

(1) Modification 1
As shown in FIG. 5 , the filtering member 40 may have a wall surface 44 at the other end opposite to the end connected to the mounting member 30 , the wall surface 44 forming an angle with a side surface 43 of the semi-cylinder.

The wall surface 44 is formed on the surface surrounded by the short side of the rectangular member 41A and the semicircular arc-shaped member 41B at the other end opposite the end of the frame 41 that is continuous with the mounting member 30. The filter material 42 is then attached to the members 41A and 41B so as to cover that surface, thereby forming the wall surface 44. In FIG. 5, the member 41B is attached perpendicular to the member 41A. In other words, the wall surface 44 is perpendicular to the side surface 43. In this case, the angle between the side surface 43 and the wall surface 44 is a right angle.

The angle between the side surface 43 and the wall surface 44 may be other than a right angle. For example, when the angle between the side surface 43 and the wall surface 44 is 30 degrees, the lower end of the wall surface 44 is inclined 30 degrees toward the mounting member 30 when the filter member 40 is viewed from the direction in which the short side of the member 41A extends. In this case, the wall surface 44 is formed by attaching an elliptical arc-shaped member to both ends of the short side of the member 41A at an angle of 30 degrees, and forming a surface surrounded by the short side of the member 41A and the elliptical arc-shaped member. The filter material 42 is then attached to the member 41A and the elliptical arc-shaped member so as to cover that surface, thereby forming the wall surface 44. It is preferable that the wall surface 44 is provided without any gaps with respect to the side surface 43.

In this way, the filtering member 40 has a wall surface 44 at an angle with the side surface 43 of the semi-cylinder at the other end opposite the end connected to the mounting member 30, and the wall surface 44 is made of the filter material 42, so that the area of the filter material 42 is increased and the effect of the filter material 42 in removing impurities is maintained for an even longer period of time. In other words, the device 20 can be used for an even longer period of time, so the filter material 42 or device 20 does not need to be replaced as frequently. This further reduces the workload of measuring the amount of water leakage in the inspection gallery.

In addition, by providing the wall surface 44 with no gap between the side surface 43 and the wall surface 44, the leaking water passes through the side surface 43 or the wall surface 44. Therefore, impurities can be removed from the leaking water more effectively.

(2) Modification 2
The filtering member 40 may have a side surface 43 that is continuous with the tubular side surface of the mounting member 30, and a wall surface 44 that forms an angle with the side surface 43 at the other end opposite the end that is continuous with the mounting member 30, and may be in the shape of a tube having a tube axis that is aligned with the tube axis of the mounting member 30.

For example, as shown in FIG. 6, the filter member 40 is a semi-cylinder, and has a semi-cylinder side surface 43 that is continuous with the cylindrical side surface of the mounting member 30, a wall surface 44 that forms an angle with the semi-cylinder side surface 43, and an upper surface 45 that closes the upper opening of the side surface 43.

In this case, the frame 41 forming the semi-cylindrical shape is configured to have the same shape as in the embodiment. The frame 41 is attached to the mounting member 30 so that one of the two short sides of the member 41A contacts the end of the mounting member 30 and the long side of the member 41A extends along the cylindrical axis of the mounting member 30.

Alternatively, the filter member 40 may be cylindrical and have a cylindrical side surface 43 that is continuous with the cylindrical side surface of the mounting member 30, and a wall surface 44 that closes the opening of the side surface 43 at the other end opposite the one end that is continuous with the mounting member 30.

In this case, the frame 41 that forms the cylindrical shape is formed by combining a rod material and a circular member that is made by forming the rod material into a circle with approximately the same diameter as the tube of the mounting member 30. First, multiple circular members are arranged in parallel so that the centers of the circles are on the same straight line, and are separated by a predetermined distance. Next, multiple rod materials are attached to the multiple circular members so as to connect the multiple circular members. At this time, the rod material is attached to the circular members so that it is parallel to the straight line that passes through the centers of the multiple circular members. Also, the rod material is attached to the multiple circular members so that the circular members are connected to both ends of the rod material. In this way, the frame 41 is formed in a cylindrical shape. Then, the frame 41 is attached to the mounting member 30 by bringing one of the circular members that form both ends of the tube into contact with the end of the mounting member 30. Therefore, the mounting member 30 and the frame 41 are continuous. Also, the frame 41 is configured so that the rod material extends along the cylindrical axis of the mounting member 30, and the axis of the circular member extends along the cylindrical axis of the mounting member 30.

The filter material 42 is then attached to the frame 41 forming the semi-cylindrical shape or the frame 41 forming the cylindrical shape so as to cover the entire circumference. When the filter material 42 is attached to the frame 41 forming the semi-cylindrical shape, it forms the side surface 43, the wall surface 44, and the top surface 45. When the filter material 42 is attached to the frame 41 forming the cylindrical shape, it forms the side surface 43 and the wall surface 44 of the cylinder.

In this way, since the entire filter member 40 is made of the filter material 42, the leaking water that flows down into the appliance 20 passes through one of the side surfaces 43, wall surfaces 44, or top surface 45 formed by the filter material 42. Therefore, the entire filter material 42 is unlikely to become clogged at once, and the leaking water is unlikely to overflow from the appliance 20.

(3) Modification 3
The instrument 20 may have a sensor (not shown) that detects clogging of the filter material 42. For example, the sensor is installed at a position a predetermined distance away from the end of the side surface 43 opposite the end that is continuous with the mounting member 30 toward the mounting member 30. The sensor is communicatively connected to the communication device 13. When the sensor detects clogging of the filter material 42, it transmits a clogging signal to the communication device 13. When the communication device 13 receives the clogging signal, it transmits the clogging signal to a computer outside the inspection gallery.

In this way, by having a sensor that detects clogging of the filter material 42, the equipment 20 can notify a worker outside the inspection gallery that it is time to perform maintenance on the equipment 20 before the filter material 42 becomes completely clogged. This allows the worker to perform maintenance on the equipment 20 at the appropriate time.

(4) Modification 4
The side surface 43 may have an uneven portion (not shown) in part. For example, the side surface 43 having the uneven portion has a convex portion that protrudes toward the inside of the cylinder and extends in the axial direction of the cylinder. This convex portion is formed as follows. First, a rectangular frame whose long side is shorter than the axial length of the half cylinder is prepared. Next, inside the half cylinder of the filtering member 40 of this embodiment, the rectangular frame is attached to the member 41B so that the long side of the frame and the cylinder axis are parallel. Then, the filter material 42 is attached so as to cover the attached rectangular frame. Then, since the rectangular frame is attached in a convex manner to the inside of the half cylinder, the filter material 42 attached to the rectangular frame forms a convex portion on the inside of the side surface 43.

In this way, by having the uneven surface of the side surface 43, the area of the filter material 42 is increased, and the impurity removal effect of the filter material 42 is maintained for a longer period of time. In other words, the device 20 can be used for a longer period of time, and the frequency of replacement of the filter material 42 or the device 20 can be reduced. This further reduces the workload of measuring the amount of water leakage in the inspection gallery.

The above embodiment is intended to facilitate understanding of the present invention, and is not intended to limit the present invention. The present invention may be modified or improved without departing from the spirit of the present invention, and equivalents thereof are also included in the present invention.

In this embodiment, the leakage measurement device 10 includes a water tank 11 and a measuring device 12, and the amount of leakage is measured by measuring the water level of the leakage water stored in the water tank 11 using the measuring device 12. However, the amount of leakage may be measured using another method.

For example, the leakage measurement device 10 includes a scale arranged vertically along the cutout 11A instead of the measuring device 12, and a camera (not shown) that photographs the cutout 11A and the scale. The camera is arranged in front of the side panel on which the cutout 11A is arranged, at a predetermined distance from the side panel. The camera is communicatively connected to the communication device 13. The camera photographs the scale and the water surface position of the leaking water flowing out from the cutout 11A, and transmits the photographed data to the communication device 13. The communication device 13 then receives the photographed data from the camera and transmits it to a computer outside the inspection gallery. Here, by measuring the relationship between the water surface position of the leaking water relative to the scale and the amount of leaking water in advance, the amount of leaking water can be measured from the water surface position of the leaking water relative to the scale.

Alternatively, the leakage measurement device 10 may be configured to include a water level gauge (not shown) instead of the measuring device 12. The water level gauge measures the water level of the leaking water stored in the water tank 11 instead of the measuring device 12. Examples of water level gauges include float type, guide rope type, capacitance type, and pressure type. The water level gauge is communicatively connected to the communication device 13, and transmits water level data measured by the water level gauge to the communication device 13. The communication device 13 then receives the water level data from the water level gauge and transmits it to a computer outside the inspection gallery. Note that the method of measuring the amount of leakage from the water level in the water tank 11 is the same as in this embodiment, so a description thereof will be omitted.

Reference Signs List 1: Pipe 2: Outlet 10: Leakage measuring device 11: Water tank 20: Equipment 30: Mounting member 40: Filtration member 42: Filter material (filter)
43...Side 44...Wall

Claims (5)

An instrument installed in an inspection gallery to measure the amount of water leaking into the dam's embankment,
a filtering member having a water-permeable filter, which receives the leaked water flowing from an outlet of a pipe through which the leaked water leaked into the embankment flows into a water tank of a leak measuring device for measuring the amount of the leaked water;
an attachment member that attaches the filtering member to the piping so that the leaking water flows down to the filter;
An apparatus comprising: The pipe extends so that the outlet is directed downward from the horizontal,
The mounting member has a cylindrical shape having an inner diameter corresponding to an outer diameter of the piping, and is attached to the piping by inserting the outlet into the cylindrical shape.
The filter member has a side surface continuous with a side surface of the tube of the mounting member, and is in the shape of a half cylinder having a cylindrical axis aligned with the cylindrical axis of the mounting member, and the side surface of the half cylinder is constituted by the filter.
2. The device of claim 1. The device according to claim 2, wherein the filtering member has a wall surface at an end opposite to the end connected to the mounting member that forms an angle with the side surface of the half cylinder, and the wall surface is also formed by the filter. The pipe extends so that the outlet is directed downward from the horizontal,
The mounting member has a cylindrical shape having an inner diameter corresponding to an outer diameter of the piping, and is attached to the piping by inserting the outlet into the cylindrical shape.
2. The device according to claim 1, wherein the filtering member has a side surface continuous with a tubular side surface of the mounting member, is shaped like a tube having a tubular axis aligned with the tubular axis of the mounting member, and has a wall surface at an end opposite to the end continuous with the mounting member that forms an angle with the side surface, and the side surface and wall surface of the tube are formed by the filter. The device according to any one of claims 2 to 4, wherein the length of the filtering member in a direction parallel to the cylindrical axis is longer than the length in a direction perpendicular to the cylindrical axis.

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