Equipment

Abstract

To reduce the work load of water leakage measurement work in an inspection corridor.SOLUTION: A device 20 installed in an inspection corridor to measure the amount of water leakage into a dam body comprises a filtering member 40 which has a filter material 42 having water permeability and receives leaked water flowing down to a water storage tank 11 of a water leakage measuring device 10 for measuring the amount of leakage from an outlet 2 of a pipe 1 through which the water leaked into the dam body flows, and a mounting member 30 for mounting the filtering member 40 to the pipe 1 so that the leaked water flows down to the filter material 42.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an instrument. [Background technology]

[0002] Dams hold back large volumes of water with their embankments. In order to detect any abnormalities or changes in the condition of the embankments, inspections and monitoring are carried out daily using a variety of methods.

[0003] One of these is the measurement of the amount of water leaking into the embankment. When measuring the amount of water leakage, the leaking water is collected in a water tank installed in an inspection gallery that is constructed as a monitoring passage inside the embankment, 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 constitutes 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 described in Patent Document 1. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5113873 Summary of the Invention [Problem to be solved by the invention]

[0005] However, cleaning the tanks must be done in a narrow inspection gallery, which is a heavy workload for workers, especially during summer and winter.

[0006] In addition, dams are often built in mountainous areas, and it takes time for workers to reach the dams, so there is a desire to reduce the frequency of visits.

[0007] Therefore, the present invention has been made in consideration of such problems, and aims to reduce the workload of measuring the amount of water leakage in an inspection gallery. [Means for solving the problem]

[0008] In order 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 embankment of a dam, the instrument comprising: a filter having water permeability; a filtering 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 filtering member to the pipe so that the leaked water flows into the filter. Effect of the Invention

[0009] According to an embodiment of the present invention, the workload of measuring the amount of water leakage in an inspection gallery can be reduced. [Brief description of the drawings]

[0010] [Figure 1] FIG. 2 is a perspective view of a pipe 1 and a water leakage measuring device 10. [Diagram 2] 2 is a perspective view of the mounting member 30 and the frame 41. FIG. [Diagram 3] FIG. [Figure 4] FIG. 2 is a perspective view of the device 20. [Diagram 5] FIG. 2 is a perspective view of a device 20 in a first modified example. [Figure 6] FIG. 11 is a perspective view of the device 20 in the second modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, the embodiments of the present invention will be described with reference to the drawings. The embodiments described below are subject to various technically preferable limitations for carrying out the present invention, but these limitations do not limit the scope of the present invention to the following embodiments and illustrated examples.

[0012] <How to measure the amount of leakage> 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.

[0013] Water collecting devices (not shown) are installed at multiple locations inside the embankment. Water leaking from inside the embankment is collected through piping 1 into a water tank 11 installed in the inspection gallery.

[0014] A notch 11A is formed in the water tank 11, and when the level of water in the water tank 11 reaches the lower end of the notch 11A, the water starts to flow out from the notch 11A.

[0015] 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 and the more stable it will be. Conversely, the less the amount of 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 and the more stable it will be.

[0016] Therefore, by measuring the height of the water surface in the water tank 11, the amount of leakage water flowing from the pipe 1 into the water tank 11 can be obtained.

[0017] In this embodiment, the height of the water surface in the water tank 11 is measured using a measuring device 12, which will be described later.

[0018] Here, 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 constitutes the embankment, particles such as sand, suspended matter such as algae and water blooms, bacteria, microorganisms, etc. 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 calculate the amount of leaking water.

[0019] Therefore, in this embodiment, impurities in the leaking water are prevented from accumulating in the notch portion 11A by using the device 20. This will be described in detail below.

[0020] <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.

[0021] The pipe 1 is a pipe that guides leakage water leaking into the inspection gallery to the leakage measuring device 10. The pipe 1 is, for example, a metal pipe. The pipe 1 is arranged in a straight line near the 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 leakage water flows out of the pipe 1. The outlet 2 has a cylindrical shape 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.

[0022] The water leakage measuring device 10 is a device that measures the amount of water leakage. The water leakage measuring device 10 is provided 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.

[0023] The water leakage measurement device 10 according to this embodiment includes a water tank 11, a measurement device 12, and a communication device 13, for example.

[0024] The water tank 11 is a water tank that collects leaked water. The water tank 11 is provided below the outlet 2, and collects 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 side surfaces. The notch 11A is an outlet for leaked water in the water tank 11. The notch 11A is a portion obtained by cutting out the side surface in a triangular shape from the upper edge.

[0025] Measuring device 12 is a device that measures the water level of leaking water stored in water tank 11. Measuring device 12 includes ultrasonic generator 12A and detector 12B.

[0026] 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 as to be able to communicate with them. The ultrasonic generator 12A transmits a signal to the detector 12B at the timing of generating ultrasonic waves.

[0027] 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 as to be able to communicate with them. The detector 12B detects ultrasonic waves generated by the ultrasonic generator 12A.

[0028] Furthermore, detector 12B 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 ultrasonic waves reflected from the water surface. Detector 12B detects the water level of the leaking water stored in water tank 11 by measuring the distance from the bottom plate of water tank 11 to detector 12B in advance and subtracting the distance from detector 12B to the water surface from that distance. Then, detector 12B transmits the detected water level data of the leaking water to communication device 13.

[0029] The communication device 13 is a device for transmitting and receiving data to and from a computer (not shown) installed 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 leakage from the detector 12B and transmits it to the computer outside the inspection gallery.

[0030] 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, the amount of leaking water flowing out from the notch 11A increases as the water level of the water tank 11 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.

[0031] <Instruments> 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 an attachment member 30 and a filtering member 40 (see FIG. 4).

[0032] The mounting member 30 is a member that mounts the filter member 40 to the pipe 1 so that the leaking water flows down to the filter material 42 described later. As shown in FIG. 2, the mounting member 30 is shaped like a cylinder. The mounting member 30 is, for example, a member made of metal. The inner diameter of the mounting member 30 corresponds to the outer diameter of the outlet 2. Therefore, the mounting member 30 can be mounted coaxially with the outlet 2 by inserting the outlet 2 into the cylinder. 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 shaped like a square tube. The mounting member 30 may also be made of resin or wood.

[0033] In this way, since the inner diameter of the mounting member 30 corresponds to the outer diameter of the outlet 2 , the mounting member 30 can be easily attached to the outlet 2 .

[0034] In addition, since the mounting member 30 and the filter member 40 are continuous, there is no gap between the two members. Therefore, the leaking water flowing out from the outlet 2 flows down to the filter member 40 without leaking.

[0035] The filtering member 40 is a member that receives the leaking water flowing down from the outlet 2. The filtering member 40 includes a frame 41 and a filter material 42.

[0036] 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 is formed into a rectangular shape and a member 41B in which a rod is formed into a semicircular arc shape having approximately the same diameter as the cylinder of the mounting member 30. The frame 41 is formed, for example, by attaching a plurality of members 41B to the member 41A in the long side direction of the member 41A at a predetermined interval. 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. Further, the frame 41 is configured such that the long side of the member 41A extends along the cylindrical axis of the mounting member 30, and the axis of the member 41B extends along the cylindrical axis of the mounting member 30.

[0037] The frame 41 may be formed by bending a plurality of wires to produce members corresponding to the rectangular member 41A and the semicircular arc member 41B. Alternatively, the frame 41 may be formed by bending a metal net into a semi-cylindrical shape. The frame 41 may also be made of resin or wood.

[0038] 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 a side surface 43 of the filtering member 40. The side surface 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 coaxial or parallel to the cylindrical axis of the mounting member 30. In addition, the side surface 43 is continuous with the side surface of the mounting member 30, since 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 water-insoluble paper filter.

[0039] By attaching such a device 20 to the outlet 2, impurities are removed from the leaking water, making it difficult for impurities to flow into the water tank 11.

[0040] <How to use the equipment> A method of using the device 20 will be described. The device 20 is attached to a 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.

[0041] When the appliance 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 in the same axial direction as the cylindrical axis of the mounting member 30 along the member 41B, 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.

[0042] Therefore, with the device 20 according to this embodiment, even if part of the filter material 42 becomes clogged, impurities can be removed from the leaking water for a long period of time because the leaking water passes through the unclogged part of the filter material 42. This reduces the frequency with which the device 20 needs to be replaced.

[0043] 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 periodically clean the water tank 11. 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, and the water tank 11 becomes 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 measuring device 10.

[0044] Also, if impurities adhere to the cutout 11A, the amount of leakage cannot be measured correctly, so the cutout 11A must 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 cutout 11A, so the frequency of cleaning the cutout 11A can be reduced.

[0045] 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 desired to reduce the frequency of maintenance of the water leakage measurement device 10. As described above, by using the tool 20, the frequency of maintenance of the water leakage measurement device 10 is reduced, thereby reducing the burden on workers.

[0046] <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 filtering member 40 that receives leaked water flowing from the outlet 2 of the piping 1 through which the leaked water 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 filtering member 40 to the piping 1 so that the leaked water flows into the filter material 42.

[0047] 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 difficult for impurities to flow into the water tank 11, so that 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.

[0048] In addition, by making it possible to reduce the frequency of cleaning the water tank 11, it is possible to reduce the number of times that workers have to visit the dam. This reduces the workload of leak measurement work in the inspection gallery.

[0049] Furthermore, since 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.

[0050] In addition, the device 20 of this embodiment is equipped with a mounting member 30 having a cylindrical shape with an inner diameter corresponding to the outer diameter of the piping 1 extending so that the outlet 2 is directed downward from the horizontal, and is attached to the piping 1 by inserting the outlet 2 into the cylinder, and a filtering member 40 having a side 43 continuous with the cylindrical side of the mounting member 30, being in the shape of a half cylinder having a cylindrical axis aligned with the cylindrical axis of the mounting member 30, the side 43 of the half cylinder being composed of a filter material 42.

[0051] By using the mounting member 30 having such a configuration, the device 20 can be easily attached to the piping 1. In other words, the installation work of the device 20 is facilitated and the installation time is shortened. Therefore, the workload of the leakage measurement work in the inspection gallery can be further reduced.

[0052] 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 having a tube axis that is aligned with the tube axis of the mounting member 30, and the side surface 43 is made 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 that the effect of removing impurities by the filter material 42 is maintained for a long period of time. In other words, the device 20 can be used for a long period of time, so that the frequency of replacing the filter material 42 or the device 20 is reduced. This further reduces the workload of the leakage measurement work in the inspection gallery.

[0053] 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.

[0054] 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 filtering 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 reach an unclogged part of the filter material 42 without changing the flow direction and go over the clogged part of the filter material 42. This reduces the possibility that the leaking water will accumulate inside the filtering member 40 or overflow from the filtering member 40.

[0055] <Modification> The modifications described below may be applied in combination.

[0056] (1) Variation 1 As shown in FIG. 5, the filtering member 40 may have a wall surface 44 at the other end opposite to the one end connected to the mounting member 30, the wall surface 44 forming an angle with a side surface 43 of the half cylinder.

[0057] The wall surface 44 is formed on the surface surrounded by the short side portion of the rectangular member 41A and the semicircular arc-shaped member 41B at the other end opposite to the one end of the frame 41 that is continuous with the mounting member 30. The filter material 42 is attached to the members 41A and 41B so as to cover the 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.

[0058] 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 on a surface surrounded by the short side of the member 41A and the elliptical arc-shaped member by attaching the elliptical arc-shaped member to both ends of the short side of the member 41A at an angle of 30 degrees. Then, the filter material 42 is attached to the member 41A and the elliptical arc-shaped member so as to cover the surface, thereby forming the wall surface 44. It is preferable that the wall surface 44 is provided without any gap with respect to the side surface 43.

[0059] 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 to 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. In other words, the device 20 can be used for an even longer period, so the filter material 42 or the 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.

[0060] In addition, by providing the wall surface 44 without any gaps with respect to the side surface 43, 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.

[0061] (2) Variation 2 The filtration member 40 may have a side surface 43 that is continuous with the cylindrical 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 aligned with the tube axis of the mounting member 30.

[0062] For example, the filtering member 40 is a semi-cylinder as shown in FIG. 6 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.

[0063] 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 such 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.

[0064] Alternatively, the filtering 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.

[0065] In this case, the frame 41 forming the cylindrical shape is formed by combining a bar material and a circular member formed by forming the bar material into a circle having approximately the same diameter as the tube of the mounting member 30. First, a plurality of circular members are arranged in parallel so that the centers of the respective circles are on the same straight line, and are separated by a predetermined interval. Next, a plurality of bar materials are attached to the plurality of circular members so as to connect the plurality of circular members. At this time, the bar material is attached to the circular member so as to be parallel to a straight line passing through the centers of the plurality of circular members. Also, the bar material is attached to the plurality of circular members so that the circular members are connected to both ends of the bar 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 constituting 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 bar 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.

[0066] The filter material 42 is attached to the frame 41 forming a semi-cylinder shape or the frame 41 forming a cylinder shape so as to cover the entire circumference. When the filter material 42 is attached to the frame 41 forming the semi-cylinder shape, it forms a side surface 43, a wall surface 44, and an upper surface 45. When the filter material 42 is attached to the frame 41 forming the cylinder shape, it forms the side surface 43 and the wall surface 44 of the cylinder.

[0067] In this way, by making the entire filtering member 40 out of the filter material 42, leaking water flowing down into the appliance 20 passes through any one of the side surface 43, wall surface 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 leaking water is unlikely to overflow from the appliance 20.

[0068] (3) Variation 3 The device 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.

[0069] 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.

[0070] (4) Variation 4 The side surface 43 may have an uneven portion (not shown) in a part thereof. 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.

[0071] In this way, by having the uneven surface on 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 the leakage measurement work in the inspection gallery.

[0072] The above-described embodiment is for the purpose of facilitating 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.

[0073] In this embodiment, the leakage measuring device 10 is equipped with a water tank 11 and a measuring device 12, and the amount of leakage is measured by the measuring device 12 measuring the water level of the leakage water stored in the water tank 11. However, the amount of leakage may be measured by another method.

[0074] For example, the leakage measurement device 10 includes a scale provided vertically along the notch 11A instead of the measuring device 12, and a camera (not shown) that photographs the notch 11A and the scale. The camera is provided in front of the side panel on which the notch 11A is provided, at a position a predetermined distance away 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 notch 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.

[0075] Alternatively, the leakage measuring 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. [Explanation of symbols]

[0076] 1. Piping 2... Outlet 10…Water leakage measuring device 11...Water tank 20...Instruments 30...Mounting member 40...Filter member 42...Filter material (filter) 43…Side 44…Wall

Claims

1. 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:

2. 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.

3. 3. 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, the wall surface being angled with a side surface of the half cylinder, the wall surface also being constituted by the filter.

4. 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.

5. The device according to claim 2 , wherein the filtering member has a length in a direction parallel to the cylindrical axis that is longer than a length in a direction perpendicular to the cylindrical axis.

Images