Water tank having water leakage detection function

Abstract

The present invention relates to a water tank having a water leakage detection function which detects a water leakage sound through lining panels installed in a concrete structure forming a water storage space to detect a lining panel joint part where a water leak has occurred, the water tank including: a concrete structure (1) forming a water storage space; a lining structure (2) including lining panels (21) fixed to the inner surface of the water storage space, each of the lining panels being formed by bonding a polyethylene sheet (212) to a stainless steel plate (211), the lining panels being butted against each other; a water leakage sound transmission plate (3) which is in close contact with the stainless steel plate (211) of each of the lining panels (21) fixed to a wall surface (11) so as to be used as a transmission path for a water leakage sound; measuring instruments (4) which are installed at an interval along the water leakage sound transmission plate (3) and each of which detects a water leakage sound transmitted to the water leakage sound transmission plate (3); and a water leakage position detector (5) which estimates a water leakage position by mutually comparing water leakage sound data according to positions at which water leakage sound is detected by the measuring instruments (4).

Description

Water tank with leak detection function

[0001] The present invention relates to a water tank having a leak detection function that detects a leak sound through a lining panel installed in a concrete structure forming a water storage space and detects a lining panel joint where a leak has occurred.

[0002] Large-scale reservoirs constructed to store large amounts of water, not only in water supply facilities such as water tanks, water purification plants, sedimentation tanks, and filters, but also in various industrial fields other than water supply facilities, are generally constructed of concrete structures.

[0003] In addition, among the inner surfaces of the reservoir formed with a concrete structure, waterproof lining work is performed on at least the walls, floors, and pillars that come into contact with water for the purpose of preventing water contamination and enhancing durability.

[0004] For these waterproof lining works, it is recommended to use a composite lining panel made by bonding a polyethylene sheet with excellent antibacterial properties to a stainless steel plate with excellent corrosion resistance, either by high-temperature melt pressing or adhesive.

[0005] The lining panel manufactured and constructed by the applicant of the present invention is manufactured to have a constant thickness and width, so that it is cut to an area suitable for covering the inner surface of the reservoir to be lined, and then the stainless steel plate is butted and fixed so that it faces the inner surface of the reservoir. A narrow polyethylene finishing sheet is heat-welded to the butt joint to waterproof it, and an additional caulking operation is performed by heat-welding the edges of the finishing sheet with a polyethylene welding rod. The inner surface of the butt joint is in close contact with the inner surface of the reservoir, and a silicone pad may be attached to increase the watertightness of the butt joint.

[0006] Lining structures constructed in this way with non-adhesive lining panels have many advantages, including double waterproofing, simple construction, prevention of harmful substances, excellent hygiene, and a semi-permanent lifespan.

[0007] However, even if the joints between the lining panels are double waterproofed by using a finishing sheet and performing caulking work, it is necessary to check for leaks in the joints, so a leak test is performed using, for example, a spark test method.

[0008] However, additional testing is required to ensure the reliability of the leak test results, and leaks may occur due to various factors such as unevenness of the heat-welded area, changes in water pressure, and changes in temperature during long-term use of the reservoir.

[0009] Patent Publication No. 10-2010-0051371, which is for detecting water leakage at a joint, can check for water leakage at the joint by inserting a hydrochromic material into the joint, but it is easy to check only when the reservoir is empty, and the insertion of the hydrochromic material reduces the strength of the joint. Patent Publication No. 10-2021-0096856, which can check the location of a water leak by inserting a hydrochromic member between a waterproof sheet and a wall and installing a recognition sensor that detects the degree of tension of the waterproof sheet due to hydrochromic expansion, has the difficulty of involving complex construction such as a hydrochromic member, a recognition sensor, and electric signal wiring.

[0010] [Prior Art Literature]

[0011] [Patent Document]

[0012] (Patent Document 1) KR 10-2010-0051371 A 2010.05.17.

[0013] (Patent Document 2) KR 10-2021-0096856 A 2021.08.06.

[0014] Accordingly, the purpose of the present invention is to provide a water tank having a leak detection function that is easy to construct and can be constructed and operated without damaging the waterproofness and durability of the lining panel by detecting the presence and location of a leak using a lining panel.

[0015] In order to achieve the above object, the present invention provides a water tank having a water leak detection function, comprising: a concrete structure (1) for forming a water storage space; a lining panel (21) formed by bonding a polyethylene sheet (212) to a stainless steel plate (211) and fixing it against at least an inner wall surface (121) and a bottom surface of the concrete structure (1), such that the polyethylene sheet (212) is exposed to the water storage space by facing the surface to which the stainless steel plate (211) is fixed, and the abutment portion between the lining panels (21) is covered with a finishing sheet (22) and heat-sealed to waterproof it; a water leak sound transmission plate (3) which is used as a transmission path of water leak sound transmitted to the stainless steel plate (211) when a water leak occurs, and which is in close contact with the Spanish lace steel plate (211) of each lining panel (21) fixed to the wall surface (121); It includes a measuring device (4) installed at intervals along a leak sound transmission plate (3) to detect leak sound transmitted to each leak sound transmission plate (3); a leak location detector (5) that collects leak sound data detected by each measuring device (4) and estimates the location of the leak by comparing the leak sound data by location of the measuring devices (4) where the leak sound is detected.

[0016] The present invention, configured as described above, utilizes the characteristics of the stainless steel plate (211) of the lining panel (21) that facilitates transmitting the sound of leakage occurring at the joint of the lining panel (21), and additionally constructs a sound-transmitting plate (3) that adheres closely to the stainless steel plate (211), so that it does not interfere with the construction of the lining panel (21), making it easy to construct, and by installing a measuring device (4) at an appropriate location, it is possible to detect whether there is a leak and the joint where a leak has occurred, making it easy to perform a leak repair work.

[0017] Figure 1 is a perspective view of a water tank according to an embodiment of the present invention.

[0018] Figure 2 is a drawing showing the construction sequence of the lining structure (2) and the leak sound transmission plate (3).

[0019] Figure 3 is a drawing showing the installation location of the measuring instrument (4).

[0020] Figure 4 is a cross-sectional view of a portion of a wall after waterproofing it by fixing the lining panel (21) against it.

[0021] Figure 5 is a vertical cross-sectional view of a portion of a wall where an anchor (25) is installed to adhere a soundproofing plate (3) to a lining panel (21).

[0022] Figure 6 is a block diagram of components for leak location detection.

[0023] Hereinafter, a preferred embodiment of the present invention will be described with reference to the attached drawings so that a person having ordinary knowledge in the field can easily implement the present invention.

[0024] It should be noted that reference numbers indicated for configurations or functions in the attached drawings are used with the same reference numbers as possible when indicating the same configurations or functions in other drawings.

[0025] In addition, when describing an embodiment of the present invention, if it is determined that a detailed description of a function or configuration of a related known matter may unnecessarily obscure the gist of the present invention, the detailed description is omitted.

[0026] Fig. 1 is a perspective view showing the interior of a water tank according to an embodiment of the present invention. In order to show the lining structure (2) constructed on the inner surface of the water tank and the water leak detection means (3, 4) installed along the wall (12), the ceiling is omitted and the wall (12) is shown as a perspective view.

[0027] Referring to FIG. 1, a water tank according to an embodiment of the present invention includes a concrete structure (1) for creating an internal space for storing water, a lining structure (2) constructed inside the concrete structure (1), a water leak sound transmission plate (3) coupled to the lining structure (2), a plurality of measuring devices (4) for detecting vibration of the water leak sound transmission plate (3) to obtain water leak sound data, and a water leak location detector (5) installed outside the concrete structure (1) for determining whether there is a water leak and the location of the water leak based on the analysis results of the water leak sound data.

[0028] The above concrete structure (1) is a structure in which a concrete floor (11) is first constructed, and then a wall (11) and a ceiling (not shown) are formed on top of the concrete floor (11) so that the internal space surrounded by the floor, wall, and ceiling is used as a water storage space. In the case of a large-scale concrete structure (1), a pillar (13) is also constructed as shown. As is known, the wall (12), pillar (13), and ceiling are constructed by performing tasks such as reinforcing bar arrangement, formwork installation, concrete pouring and curing, and formwork dismantling, and for maintenance, an entrance (14) and stairs (15) are installed, and although not shown, a water collection well, water supply pipes, and drainage pipes are installed.

[0029] Among the inner surfaces of the concrete structure (1) constructed in this manner, waterproofing lining work is performed on at least the floor surface and wall surface (121) that can come into contact with the water stored inside, and in the present invention, the lining structure (2) is installed using a non-adhesive method. Of course, in the case where there is a pillar (13), the lining structure (2) is also installed on the pillar (13), and the lining structure (2) can also be installed on the ceiling, but other methods of lining may also be used.

[0030] In an embodiment of the present invention, the inner surface is lined to a height set higher than the maximum water level (HWL) of the water to be stored among the floor surface, wall surface (121) and pillar (13).

[0031] Fig. 2 is a drawing showing the construction sequence of the lining structure (2) and the leak sound transmission plate (3) shown in Fig. 1, and Fig. 3 is a drawing showing a measuring device (4) installed on the leak sound transmission plate (3) shown in Fig. 2.

[0032] Fig. 4 is a cross-sectional view of a portion of a lining structure (2) constructed on a wall (12) according to Fig. 2, in which a lining panel (21) is placed against each other and fixed, and then waterproofed.

[0033] Fig. 5 is a vertical cross-sectional view of a portion constructed according to Figs. 2 and 3, in which an anchor (25) is installed to adhere the leak-proof sound transmission plate (3) to the lining panel (21).

[0034] The above lining structure (2) includes a lining panel (21) that covers the entire inner surface of a concrete structure (1) to be lined by a method in which edges are abutted against each other and fixed to the inner surface, a finishing sheet (22) that covers a surface exposed to a water storage space of the concrete structure (1) among the abutment portions between the lining panels (21), a caulking portion (23) formed by performing a caulking operation along the edge of the finishing sheet (22), a butting pad (24) that covers a surface of the abutment portion that is in contact with the inner surface of the concrete structure (1), an anchor (25) used to fix the lining panel (21) to the inner surface of the concrete structure (1), and a cover (26) that covers the upper portion of the lining panel (21) fixed to a wall surface (121) among the inner surfaces of the concrete structure (1).

[0035] The above lining panel (21) is formed by bonding a polyethylene sheet (212) to one side of a stainless steel plate (211) by high-temperature melting or adhesive bonding, as shown in the cross-sectional view of Fig. 4, and the stainless steel plate (211) is fixedly installed so that it faces the inner surface of the concrete structure (1) so that the polyethylene sheet (212) is exposed to the water storage space.

[0036] The above lining panel (21) is manufactured to have a certain width, cut to an appropriate length according to the surface on which it is to be installed, and fixed. When fixed to a wall (121), it is cut from the lower edge connected to the floor surface to above the maximum water level (HWL) and fixed sequentially along the wall by butting it together. Accordingly, even if a water leak occurs anywhere on the wall surface (121), the water leak noise is transmitted through the stainless steel plate (211) of the lining panel (21), which has a relatively small amount of water leak noise attenuation.

[0037] The above-mentioned mating pad (24) is attached to the surface of the mating portion of the lining panel (21) where the stainless steel plate (211) is located to prevent water leakage and seepage. For example, it can be attached to the two mating lining panels (21) using a liquid silicone sealant used to fill joints or seams. The above-mentioned mating pad (24) can be composed of a silicone pad for workability and adhesion to the concrete structure (1).

[0038] When fixing the lining panel (21) with the butt pad (24) attached to the butt joint, to the inner surface of the concrete structure (1), the anchor (25) can be used. The anchor (25) sequentially penetrates the lining panel (21) and the butt pad (24) and fixes them to the concrete structure (1), thereby compressing the lining panel (21) and the butt pad (24) and fixing them to the concrete structure (1). The anchor (25) is installed at a position close to the butt joint edge among the butt joints, so that it is covered by the finishing sheet (22). Meanwhile, it is preferable to use an anchor bolt, a knife block using a SUS screw, a striking anchor, etc. as the type of anchor (25) appropriately to firmly fix the lining panel (21) by bringing it into close contact with the concrete structure (1).

[0039] The above finishing sheet (22) is intended to cover the mating portion of the lining panel (21) fixed to the inner surface of the concrete structure (1) and then be heat-sealed to prevent leakage at the mating portion. It is configured in the form of a band having a width that can at least cover the anchor (25) used to secure the mating portion. It is preferable to configure it with a polyethylene sheet in order to be heat-sealed to the polyethylene sheet (212) of the lining panel (21).

[0040] Then, a caulking operation is performed on the edge of the above-mentioned finishing sheet (22) by heat-melting a welding rod made of polyethylene material into a rod shape to form a caulking portion (23).

[0041] Meanwhile, a finishing sheet (22) and a mating pad (24) are installed at an angle at corners between walls and floors, corners between walls, corners between pillars (13) and floors, etc., so as to span both sides forming the corners, and a caulking portion (23) is formed on the edge of the finishing sheet (22).

[0042] The above cover (26) covers the portion exposed above the maximum water level (HWL) of the lining panel (21) installed on the wall surface (121), and is manufactured to have a curved portion toward the water storage space of the concrete structure (1), and is installed to cover the upper part of the lining panel (21), so that the water stored does not splash upward even if there are waves, and even if it splashes, it does not splash toward the upper part of the lining panel (21). In addition, in order to ensure waterproofing, a caulking work is performed to heat-seal the aforementioned polyethylene material welding rod between the lower edge of the cover (26) and the lining panel (21) to form a caulking portion, and it is preferable to waterproof the area between the upper edge of the cover (26) and the wall surface (121) with a liquid silicone sealant.

[0043] The internal space created in the cover (26) manufactured and installed in this manner can be used as a space for installing a measuring device (4) described later and as a wiring space for electrically signalingly connecting a water leak location detector (5) installed on the outside of a concrete structure (1) to the measuring device (4).

[0044] According to the present invention, among the lining structures (2) constructed in this manner, at least the lining panel (21) installed on the wall surface (121) is used to detect water leaks, and for this purpose, a water leak transmission plate (3) and a measuring device (4) are installed along the wall surface (121).

[0045] The above-mentioned leakage sound transmission plate (3) is fixed along the wall surface (121) while facing each other, and is in close contact with the Spanish lace steel plate (211) of each lining panel (21) fixed to cover the wall surface (121), so as to be used as a transmission path for leakage sound transmitted to the stainless steel plate (211) when a leakage occurs.

[0046] According to a specific embodiment, the leak sound transmission plate (3) is installed so as to be positioned between the upper part of the lining panel (21) and the wall so as to reach a position higher than the maximum water level (HWL). To this end, before installing the lining panel (21) on the wall (121), the lining panel (21) is fixed to the wall in advance at the upper height of the lining panel (21), and installed in the form of a band that wraps around the upper side of the wall. For example, the lining panel (21) can be fixed to the wall using an anchor such as a striking anchor. Then, the lining panel (21) is installed on the wall (121) so that the upper part of the lining panel (21) covers the leak sound transmission plate (3), leaving only a portion of the upper part.

[0047] Here, the mating pad (24) for attaching the mating portion of the stainless steel plate (211) of the lining panel (21) is made so as not to cover the leak sound transmission plate (3) so that the stainless steel plate (211) is in direct contact with the leak sound transmission plate (3). In addition, as shown in FIGS. 2 and 5, among the anchors (25) used when fixing the lining panel (21) to the wall, the anchor (25) used for fixing the upper portion of the lining panel (21) is installed on the wall (121) while sequentially penetrating the lining panel (21) and the leak sound transmission plate (3), thereby compressing the lining panel (21) and the leak sound transmission plate (3).

[0048] Accordingly, when the leakage sound is transmitted from the upper part of the lining panel (21) installed on the wall (121) to the leakage sound transmission plate (3), the attenuation is minimized.

[0049] Meanwhile, according to the present invention, the stainless steel plate (211) of the lining panel (21) functions as a sensor for detecting a water leak. At this time, it is preferable that the distance at which the water leak sound is transmitted within the stainless steel plate (211) is the same in each lining panel (21), if possible. Accordingly, it is preferable that the anchor (25) having the function of pressing the lining panel (21) to the water leak sound transmission plate (3) is installed in the same part of each lining panel (21). That is, if the part where the water leak sound is detected is the same for any lining panel (21), the distance at which the sound is transmitted on its own to be transmitted to the water leak sound transmission plate (3) is the same.

[0050] According to an embodiment of the present invention, the leakage sound transmitting plate (3) has a dustproof sheet (31) attached to the surface that comes into contact with the wall surface as shown in the vertical cross-section of FIG. 5, thereby reducing the amount of attenuation of the intensity of the leakage sound transmitted to the wall surface (121).

[0051] The above measuring devices (4) are installed at predetermined intervals along the leak sound transmission plate (3) to detect the leak sound transmitted and propagated to the leak sound transmission plate (3) at each installed location. The measuring devices (4) are installed at intervals that are multiples of the width of the lining panel (21), and their relative positions with respect to the leak sound transmission plate (3) closest to the installed location are also the same, so that when estimating the location of the leak using the measuring device (4) that detected the leak sound, the location of the leak can be estimated in the same manner regardless of which measuring device (4) detects the leak sound.

[0052] The measuring device (4) for this purpose may include a water leak sensor (41) for detecting water leak sound transmitted as vibration by contacting the water leak sound transmission plate (3) as illustrated in Fig. 6, a controller (42) for obtaining water leak sound data through the water leak sound sensor (41), and a communication unit (43) for transmitting the water leak sound data to the water leak location detector (5). The measuring device (4) may be connected to the water leak location detector (5) by wire or wirelessly, and in the case of a wired connection, the wiring may be performed along the water leak sound transmission plate (3) and then connected to the water leak location detector (5) through the entrance (14). Although a battery may be used for power, it is preferable to always supply electricity by conducting electrical wiring along a wired path for communication. Of course, the measuring device (4) is preferably designed to have a waterproof structure and to be firmly fixed and installed on a wall.

[0053] After installing the above measuring instrument (4), the above-mentioned finishing sheet (22) is installed and a caulking part (23) is formed, and then the above-mentioned cover (26) is installed, so that the above-mentioned leak sound transmission plate (3) is covered by the cover (26). Of course, wired and electrical wires are also covered by the cover (26).

[0054] The above-mentioned leak location detector (5) collects leak sound data transmitted from each measuring device (4) installed inside the concrete structure (1), and estimates the location of the leak by comparing the leak sound data at each location of the measuring device (4) where the leak sound is detected.

[0055] Since the above measuring device (4) can detect noises such as noises generated by the inflow and outflow of water through a water supply pipe or a water supply pipe, noises generated by the flow of water within a concrete structure (1), and noises generated outside the concrete structure (1), the water leak location detector (5) according to an embodiment of the present invention is provided with a water leak noise identification unit (51) and a water leak location estimation unit (52) as shown in FIG. 6.

[0056] The above water leak identification unit (51) collects data obtained by detection from each measuring device (4) during a time period when noise is the lowest and there is no or very little water inflow or outflow, for example, at night, and then identifies water leaks.

[0057] The above-mentioned leak location estimation unit (52) estimates the leak location by comparing the leak sound data obtained from each measuring device (4) in which the leak sound has been identified.

[0058] The leakage noise detected in the above-described lining structure (2) may generally include specific frequency components. Accordingly, the frequency components of the leakage noise can be analyzed using the model of the above-described lining structure (2), and the leakage noise frequency band can be preset based on the analysis results. In addition, the leakage noise can be identified by frequency analysis of the data obtained through each measuring device (4).

[0059] The above-mentioned leak location estimation unit (52) estimates the leak location by applying leak sound data detected from at least two measuring instruments (4).

[0060] The location of the leak can be estimated by using the difference in arrival time of the leak sound between the measuring instruments (4) obtained by correlation analysis of the leak sound obtained by each measuring instrument (4). In other words, the location of the leak can be estimated by obtaining the difference in the distance that the leak sound has propagated from the difference in arrival time of the leak sound.

[0061] In general, since water leakage occurs at the location where the finishing sheet (22) is installed, i.e., the abutment area of ​​the lining panel (21), the estimated location of the leakage here appears as the abutment area. As previously explained, the area where the stainless steel plate (211) of the lining panel (21) is attached to the leakage sound transmission plate (3) using an anchor is the same, so no matter where the leakage sound occurs among the abutment areas, the difference in the transmission distance of the leakage sound in the stainless steel plate (211) is not large, and ultimately, it is possible to estimate in which abutment area of ​​the lining panel (21) the leakage occurred. The exact location of the leakage in the abutment area estimated to be the leakage can be found using a commonly used spark test method.

[0062] However, since the interval between the measuring instruments (4) is very short, an error in the measurement of the time difference between the arrival of the leak sound obtained by correlation analysis may occur.

[0063] Accordingly, in an embodiment of the present invention, the characteristic that the intensity of the leakage noise is attenuated inversely proportional to the propagation distance is utilized.

[0064] Here, the intensity of the leak noise detected by the measuring device (4) is obtained as the power of the frequency component appearing in the leak noise frequency band, and the inverse relationship between the leak noise intensity and the propagation distance is applied to obtain the ratio of the leak noise intensity obtained for each measuring device (4), and the inverse of the ratio of the leak noise intensity is applied as the distance ratio from the measuring device (4) to the leak location. For example, if the leak noise intensities obtained from two measuring devices (4) are P1 and P2, respectively, and the distances from each measuring device (4) to the leak location are L1 and L2, the distance ratio is obtained by calculating L1 / L2=P2 / P1, so that the location separated by the distance ratio from the two measuring devices (4) can be estimated as the leak location. When the leak noise is identified from three or more measuring devices (4), two measuring devices (4) are selected to obtain the distance ratios respectively, and for example, the average location of the locations estimated according to each distance ratio can be determined as the final leak location.

[0065] In this way, since the stainless steel plate (211) of the lining panel (21) installed for lining has the characteristic of transmitting leak noise well, when installing the lining panel (21), only the simple task of installing a leak noise transmitting plate (3) passing through each lining panel (21) and the task of installing a measuring device (4) on the leak noise transmitting plate (3) are added to detect the location of the leak, it is easy to construct, and since it does not affect the waterproof performance of the lining, it is possible to construct while maintaining the waterproof performance as it is, and since it is possible to detect not only whether there is a leak but also which joint of the lining panel (21) has the leak occurred, it is possible to easily find the joint where the leak is detected and reinforce the waterproofing.

[0066] While specific embodiments have been illustrated and described above to illustrate the technical concept of the present invention, the present invention is not limited to the configuration and operation of the specific embodiments described above, and various modifications may be implemented without departing from the scope of the present invention. Therefore, such modifications should be considered within the scope of the present invention, and the scope of the present invention should be determined by the claims set forth below.

[0067] [Explanation of symbols]

[0068] 1: Concrete structure

[0069] 11: Floor 12: Wall 121: Wall

[0070] 13: Pillar 14: Entrance 15: Stairs

[0071] 2: Lining structure

[0072] 21: Lining panel

[0073] 211: Stainless steel plate 212: Polyethylene sheet 2.2T

[0074] 22: Closing sheet

[0075] 23: Cocking section

[0076] 24: Pad for facing

[0077] 25: Anchor

[0078] 26: Cover

[0079] 3: Leakage sound transmission board 31: Dustproof sheet

[0080] 4: Measuring instrument 41: Leakage noise sensor

[0081] 42: Controller 43: Communications Unit

[0082] 5: Leakage location detector 51: Leakage noise identification unit

Claims

1. Concrete structure (1) for creating a water storage space; A lining structure (2) in which a lining panel (21) is formed by bonding a polyethylene sheet (212) to a stainless steel plate (211) and is fixed against at least the inner wall surface (121) and the floor surface of a concrete structure (1), such that the polyethylene sheet (212) is exposed to the water storage space with the surface to which the stainless steel plate (211) is fixed facing, and the mating portion between the lining panels (21) is covered with a finishing sheet (22) and heat-sealed to make it waterproof; A leak sound transmission plate (3) used as a transmission path for leak sound transmitted to the stainless steel plate (211) when a leak occurs, by being attached to the Spanish lace steel plate (211) of each lining panel (21) fixed to the wall (121); A measuring device (4) installed at intervals along the leak sound transmission plate (3) to detect the leak sound transmitted to each leak sound transmission plate (3); A leak location detector (5) that collects leak noise data detected from each measuring instrument (4) and estimates the location of the leak by comparing the leak noise data at each location of the measuring instrument (4) where the leak noise is detected; Including Water tank with leak detection function.

2. In paragraph 1, The above lining panel (21) is installed from the lower edge of the wall (121) to above the maximum water level, The above-mentioned water leakage sound transmission plate (3) is installed between the wall surface (121) above the maximum water level and the upper part of the stainless steel plate (211) of the lining panel (21). The lining panel (21) and the water leakage sound transmission plate (3) are sequentially penetrated and compressed by an anchor fixed to the wall (121). The above measuring instrument (4) detects the leakage sound transmitted from the upper part of the lining panel (21) to the leakage sound transmission plate (3). Water tank with leak detection function.

3. In paragraph 2, The above-mentioned leak sound transmission plate (3) has a dustproof sheet attached to the surface facing the wall (121), The location of the anchors installed to press against the leak sound transmission plate (3) in each of the above lining panels (21) is the same, and a cover (26) is installed to cover the installed part of the leak sound transmission plate (3) and cover the measuring instrument (4). Water tank with leak detection function.

4. In paragraph 2, The above leak location detector (5) estimates the leak location by applying the inverse of the ratio of the preset frequency band leak sound intensity detected by at least two measuring instruments (4) as the distance ratio to the leak location. Water tank with leak detection function.

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