Leak detection apparatus for block system-based water supply network management
Patent Information
- Application Number
- KR1020260085444
- Authority / Receiving Office
- KR · KR
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2026-05-12
- Publication Date
- 2026-09-16
- Estimated Expiration
- 2046-05-12
Smart Images
Figure 112026057304719-PAT00001_ABST
Abstract
Description
Technology Field
[0001] The present invention relates to a leak detection device for block system-based water supply network management that enables efficient management of a water supply network while minimizing damage to water pipes by utilizing a selectively expanding sealing tube and a Coanda nozzle. Background Technology
[0003] Recently, in the field of water supply management, the establishment of 'Block Systems,' which divide water supply networks into designated zones for efficient flow management and leak detection, is accelerating.
[0004] The core of the block system is to monitor the flow rates entering and exiting each block in real time to detect and respond to leaks at an early stage.
[0005] Looking at the prior art related to this, "Device for detecting the location of pipe damage and method for detecting the location of pipe damage" (Korean Registered Patent Publication No. 10-1700825, Patent Document 1) discloses a technology for detecting the location of damage by placing an expansion part inside the pipe to close a specific section and then injecting gas to measure the pressure change.
[0006] In addition, "Wireless autonomous swimming robot for internal inspection of water pipes and inspection method using the same" (Korean Registered Patent Publication No. 10-1905584, Patent Document 2) discloses a technology in which a robot equipped with a camera and a sonar sensor swims inside a pipe and investigates the condition of the inner wall with images.
[0007] In addition, "ICT integrated monitoring water management system for building a smart water city and an integrated control server for the same" (Korean Registered Patent Publication No. 10-2101625, Patent Document 3) discloses an integrated management system that monitors flow rates by block through data collected from smart meters and water pressure / leakage sensors.
[0008] In addition, "ICT and AR-based water supply network maintenance management system using smart pigs" (Korean Registered Patent Publication No. 10-2498879, Patent Document 4) discloses a technology that performs pipe cleaning and internal condition inspection using a cleaning pig connected to a traction wire and an inspection pig equipped with a camera device.
[0009] Although the aforementioned patent documents have contributed significantly to water supply network management, there are specific problems as follows in performing precise leak detection and block system-based asset management.
[0010] In the case of Patent Document 1, damage is determined based solely on simple pressure changes or gas leakage, making it difficult to pinpoint the exact leak location in the event of a minor leak, and there is a risk that excessive physical load may be applied to the aging pipeline during the pipeline closure process through the expansion section, thereby causing pipeline damage.
[0011] Exploration methods that rely on cameras and sonar, such as Patent Document 2, make it difficult to visually identify the degree of corrosion or cracks in the actual pipe body when foreign substances (scale) or sediments are present on the inner wall of the pipe.
[0012] In particular, the reliability of optical data is significantly reduced in underwater environments with high turbidity, and quantitative values such as changes in tube roundness or remaining thickness cannot be obtained using only simple image information.
[0013] Meanwhile, the monitoring system of Patent Document 3 is useful for identifying 'abnormal signs' in the entire block, but it has limitations in immediately and precisely diagnosing the specific point where actual leakage occurred and the aging condition of the pipeline in that section on-site.
[0014] This limits management to reactive maintenance, which has the disadvantage of making it difficult to establish data for preventive maintenance.
[0015] In addition, Patent Document 4 uses physical brushing or high-pressure water jets to remove foreign substances from the inner wall of the pipe, but this has chronic problems such as damaging the protective coating on the inner wall of the pipe, thereby accelerating corrosion after cleaning, or causing 'secondary accidents' such as the occurrence of red water in adjacent sections or pipe breakage due to sudden pressure fluctuations and shocks during the cleaning process.
[0016] Thus, for block system-based water supply network management, it is necessary to develop an integrated leak detection device capable of effectively removing internal wall debris that hinders detection while minimizing pipe damage, and precisely measuring the orientation of leak points and pipe integrity using numerical data. Prior art literature
[0018] KR 10-1700825 (2017.01.23)KR 10-1905584 (2018.10.01)KR 10-2101625 (2020.04.10)KR 10-2498879 (2023.02.07) The problem to be solved
[0019] The leak detection device for water supply network management based on a block system according to the present invention is intended to resolve the problems arising from the aforementioned conventional technology, and aims to provide a leak detection device optimized for the operation of a block system for efficient flow rate management of a water supply network.
[0020] More specifically, conventional acoustic detection or simple pressure monitoring methods only determine whether a leak exists within a wide area and have limitations in accurately identifying the specific location of damage. The present invention aims to provide a precise pinpoint detection function for micro-leakage points by physically isolating the suspected leak area through a pair of sealing tubes and locating the micro-leakage point without error through means such as measuring changes in air pressure.
[0021] In addition, existing sensors operating underwater are prone to data distortion due to diffuse reflection or floating debris. The present invention aims to improve inspection accuracy by creating a dry exploration environment without draining the water from the entire pipeline, by injecting high-pressure gas into an isolated section to discharge residual water, thereby providing an environment where precision sensors such as laser profilers can collect high-precision data in a dry state.
[0022] In addition, conventional mechanical brushing or high-pressure water jet methods caused the inner wall coating of aging pipes to peel off, resulting in the occurrence of red water (red tap water) and a shortened lifespan of the pipe body. The present invention aims to implement a non-destructive and low-irritation exploration process that does not cause direct impact to the pipe body by removing foreign substances using the suction pressure of a Coanda nozzle equipped in a rotating housing.
[0023] In addition, the brush member is intended to eliminate brushing blind spots and improve the performance of removing foreign substances through uniform brushing by providing an elastic support structure that allows the brush to always adhere to the inner surface of the pipe with constant pressure, regardless of changes in the diameter inside the water pipe or irregularities in the inner wall.
[0024] In addition, a fluid guide projection is formed to protrude upward on one side of the brush member, thereby inducing the high-pressure gas discharged from the Coanda nozzle to flow smoothly along the inner surface of the water pipe, suppressing collisions between gases and the generation of vortices, and thereby enabling the removal of foreign substances through the formation of a stable airflow, which is intended to prevent a decrease in exploration efficiency.
[0025] In addition, by enabling the selective injection of high-pressure air at the forefront, the problem of thick scale layers formed inside the water pipes hindering the movement or driving of the leak detection device is resolved, thereby improving driving stability and detection efficiency.
[0026] In addition, the aim is to prevent unnecessary repetitive work on the entire pipeline and maximize the time and energy efficiency of the exploration process by controlling the section isolation and precision diagnosis procedures to be carried out selectively only at leak points primarily identified through the forward detection device. means of solving the problem
[0028] To solve the above-mentioned problem, the leak detection device for water supply network management based on the block system of the present invention is composed of a body part (10a), a rear connecting part (10b) and a front connecting part (10c) formed to extend from both sides of the body part (10a), and at the end of the rear connecting part (10b), a gas inlet (11) through which high-pressure gas is introduced and an exhaust port (12) through which gas is discharged are formed spaced apart from each other, and inside the body part (10a), the rear connecting part (10b), and the front connecting part (10c), a supply air passage (11a) through which gas introduced through the gas inlet (11) moves is formed, and on the outer surface of the body part (10a), the rear connecting part (10b), and the front connecting part (10c), a body supply valve (11b) is provided to control the opening and closing and the amount of opening of the high-pressure gas moving along the supply air passage (11a). A main body (10) having a rear air supply valve (11c) and a front air supply valve (11d) respectively installed therein, and a tube exhaust passage (12a) communicating with the exhaust port (12) formed inside the main body part (10a), the rear connecting part (10b), and the front connecting part (10c), and a rear exhaust valve (12b) and a front exhaust valve (12c) respectively installed on the outer surface of the rear connecting part (10b) and the front connecting part (10c) so as to control the opening and closing of the gas to be discharged into the tube exhaust passage (12a) and control the amount of opening and closing;A rear insertion through hole (21) is formed in the center, and the rear connecting part (10b) is inserted and connected inwardly. The outer diameter is formed larger than that of the body part (10a), and a rear step (20a) is formed to protrude forward at the point where it meets the body part (10a). As the rear step (20a) is formed to protrude forward, a gear installation space (20b) is formed in the front central side surrounded by the rear step (20a). A rear sealing tube (22) that expands and contracts according to gas supply and discharge is installed along the outer surface. Inside, a rear connecting passage (23) is formed to connect the rear sealing tube (22) with the rear supply valve (11c) and the rear exhaust valve (12b), respectively. A rear outer exhaust pipe (24) that communicates from the rear step (20a) to the rear end is installed through the rear sealing tube (22). rear tube case (20) and; A front insertion through hole (31) is formed in the center, and the front connecting part (10c) is inserted and connected inwardly. The outer diameter is formed larger than that of the body part (10a), and a front step (30a) is formed to protrude to the rear side at the point where it meets the body part (10a). As the front step (30a) is formed to protrude to the rear side, a front installation space (30b) is formed in the rear central side surrounded by the front step (30a). A front sealing tube (32) that expands and contracts according to gas supply and discharge is installed along the outer surface. Inside, a front connecting passage (33) is formed to connect the front sealing tube (32), the front supply valve (11d), and the front exhaust valve (12c), respectively. A front outer exhaust pipe (34) that communicates from the front step (30a) to the front end is installed through the front sealing tube (32). front tube case (30);An outer discharge control valve (40) that is respectively installed in the rear outer exhaust pipe (24) of the rear tube case (20) and the front outer exhaust pipe (34) of the front tube case (30), and configured to control the amount of fluid discharged in the outer direction while blocking the fluid flow in the inner direction relative to the body part (10); A cylindrical rotating tube body (51) is formed such that a nozzle installation cut-out (51a) and a brush installation cut-out (51b) are formed adjacently along the longitudinal direction, and the brush installation cut-out (51b) is positioned to correspond to the front based on the rotational direction, and a through hole (52a) is formed in the center through which the rear connecting part (10b) and the front connecting part (10c) respectively pass through, and is connected to both front and rear ends of the rotating tube body (51), and its outer surface is rotatably fitted into the rear step (20a) and the front step (30a) of the rear tube case (20) and the front tube case (30), and a through hole (52a) is formed through which the rear connecting part (10b) and the front connecting part (10c) respectively pass, and is connected to the main body (10). A rotating housing (50) composed of a side wall portion (52) that is rotatably connected; a rotating drive device (60) that rotates the rotating housing (50) around the center of the main body (10), comprising: a ring-shaped internal gear (61) installed around the rear side wall portion (52) of the rotating housing (50) and having gear teeth on its inner surface; a cylindrical external gear (62) installed in the gear installation space (20b) of the rear tube case (20) and having gear teeth on its outer surface that mesh with the internal gear (61) and rotate the rotating housing (50) connected to the internal gear (61); and a drive motor (63) connected to the external gear (62) via a gear shaft to rotate the external gear (62).A brush member (70) comprising a brush housing (71) installed by being fitted into the brush installation cut section (51b) and a brush bristles (72) connected to one side of the brush housing (71) to brush foreign substances on the inner wall surface of the water pipe; A high-pressure supply port (81) is formed at the bottom, which is positioned with its upper surface facing the inner surface of the water pipe (1) while being fitted into the nozzle installation cut section (51a), and is connected to the buffer space (53) so that high-pressure gas can flow into the interior through the buffer space (53). A high-pressure discharge port (82) is formed on the upper surface to discharge the high-pressure gas that has flowed in through the high-pressure supply port (81). Inside, a high-pressure passage (83) is formed in a shape inclined toward the inner surface of the water pipe (1) in the opposite direction of the rotation direction of the rotating housing (50) so that the high-pressure gas flowing in from the high-pressure supply port (81) can move to the high-pressure discharge port (82). At the end of the high-pressure passage (83) connected to the high-pressure discharge port (82), a guide projection (83a) is formed to reduce the internal flow path cross-sectional area, and the corner of the wall opposite the guide projection (83a) is formed as a rounded section (83b). A Coanda nozzle (80) configured such that suction pressure acts in the space between the guide jaw (83a) and the inner surface of the water pipe (1), thereby guiding foreign matter on the inner surface of the water pipe (1) from the inner surface of the water pipe (1) to the surface of the rotating housing (50) in the space where suction pressure acts, and causing foreign matter that is guided to the surface of the rotating housing (50) and moves along the surface of the rotating housing (50) together with high-pressure gas to be discharged through the outer discharge control valve (40); and a joint unit (90) connected to the rear connection part (10b) of the main body (10), having a high-pressure gas supply part (91) that supplies high-pressure gas to the gas inlet (11), and a gas discharge part (92) through which gas discharged through the exhaust port (12) passes;The device comprises: a front detection device (100) installed on the front of the front tube case (30) to detect a point of abnormality in the pipe inside the water pipe (1) on the front side of the front tube case (30); and a precision detection device (110) to detect whether there is a leak in the water pipe (1) in the space between the rear sealing tube (22) and the front sealing tube (32).
[0029] In the above configuration, the brush member (70) is bolted to the rotating tube body (51) around the brush installation cut-out (51b) while being fitted into the brush installation cut-out (51b), and a lower housing (71a) is formed such that a downward step (71g) is formed between the two side walls (71m) and a lower installation space (71f) is formed between the two steps (71g), a spring insertion groove (71c) is formed in the outer direction at the bottom of the two steps (71g), and a guide projection (71d) is formed protruding upward on the upper part of the two side walls (71m); The device is characterized by comprising: a column (71h) corresponding to the above-mentioned side wall formed on both sides, a projection insertion groove (71e) formed in the column (71h) so that the guide projection (71d) is inserted and connected to the lower housing (71a) so as to be movable upward, an upper installation space (71k) formed between the two columns (71h), and an upper housing (71b) on which the brush bristles (72) are installed on the upper surface; and a plate spring (73) having a plate-like shape installed inside the lower installation space (71f) and the upper installation space (71k) with both ends inserted into the spring insertion groove (71c), and having elasticity in the central part that pushes the bottom of the upper installation space (71k) upward. This configuration allows the brush bristles (72) to have elasticity directed toward the inner surface of the water pipe (1).
[0030] In the above configuration, a fluid guide projection (74) is formed on the upper surface of the brush housing (71) such that a portion corresponding to the front direction relative to the rotational direction of the rotating tube (51) protrudes upward toward the surface of the water pipe (1), thereby inducing the high-pressure gas that moves through the Coanda nozzle (80) toward the surface of the rotating tube (51) to flow along the inner circumference of the water pipe (1), thereby suppressing collision with the high-pressure gas discharged from the high-pressure discharge port (82) of the Coanda nozzle (80).
[0031] In the above configuration, a head member (14) is connected to the front of the front connecting part (10c) of the main body (10), and an extended air supply passage (14a) is formed that is connected from the front end of the head member (14) to the air supply passage (11a) inside the front connecting part (10c). An auxiliary air supply valve (14b) is installed at the end of the extended air supply passage (14a) to control the opening and closing of high-pressure gas and control the amount of opening and closing, so as to be configured to supply high-pressure gas toward the inside of the water pipe (1) in front of the main body (10).
[0032] In the above configuration, a control device (120) is further provided that is electrically connected to the body supply valve (11b), rear supply valve (11c), front supply valve (11d), rear exhaust valve (12b), front exhaust valve (12c) of the main body (10), the driving motor (63) of the rotary drive device (60), the outer discharge control valve (40), the front detection device (100), and the precision detection device (110) to control the operation of each device, wherein the control device (120) is characterized by providing an opening signal to the rear supply valve (11c) and the front supply valve (11d) only after obtaining a front leak detection signal through the front detection device (100) to inflate the rear sealing tube (22) and the front sealing tube (32). Effects of the invention
[0034] The present invention provides a leak detection device optimized for the operation of a block system for efficient flow management of a water supply network.
[0035] More specifically, a precise pinpoint detection function for micro-leakage points is provided by physically isolating the suspected leak area through a pair of sealing tubes and locating the micro-leakage point without error using means such as measuring air pressure changes.
[0036] In addition, by injecting high-pressure gas into isolated sections to discharge residual water, an environment is provided in which precision sensors, such as laser profilers, can collect high-precision data in a dry state. This creates a dry exploration environment without draining the water from the entire pipeline, thereby increasing inspection accuracy.
[0037] In addition, by removing foreign substances using the suction pressure of a Coanda nozzle equipped in a rotating housing, a non-destructive and low-irritation exploration process that does not cause direct impact to the pipe body can be implemented.
[0038] In addition, the brush member provides an elastic support structure that allows the brush to constantly adhere to the inner surface of the pipe with constant pressure, regardless of changes in the diameter of the water pipe or irregularities in the inner wall, thereby eliminating brushing blind spots and improving the performance of removing foreign substances through uniform brushing.
[0039] In addition, a fluid guide projection is formed to protrude upward on one side of the brush member, thereby inducing the high-pressure gas discharged from the Coanda nozzle to flow smoothly along the inner surface of the water pipe, suppressing collisions between gases and the generation of vortices, and allowing foreign substances to be removed through the formation of a stable airflow, thereby preventing a decrease in exploration efficiency.
[0040] In addition, by enabling the selective injection of high-pressure air at the forefront, the problem of thick scale layers formed inside the water pipes hindering the movement or driving of the leak detection device is resolved, thereby improving driving stability and detection efficiency.
[0041] In addition, by controlling the section isolation and precise diagnosis procedures to be performed selectively only at leak points primarily identified through the forward detection device, unnecessary repetitive work on the entire pipeline is prevented, and the time and energy efficiency of the exploration process are maximized. Brief explanation of the drawing
[0043] FIGS. 1 and 2 are partially cut-and-exploded perspective views showing a leak detection device for water supply network management based on a block system of the present invention. FIG. 3 is a partially cutaway perspective view of a leak detection device for water supply network management based on a block system according to the present invention. FIG. 4 is a partially cutaway perspective view showing an example in which a head member equipped with an auxiliary air supply valve at the forefront is installed in the present invention. FIG. 5 is a configuration diagram showing the connection relationship between the control device and each component electrically connected to the control device in the present invention, and the state in which the leak detection device of the present invention is installed inside a water pipe. FIG. 6 is a front cross-sectional view and a side cross-sectional view sequentially showing an example of the operation of the leak detection device of the present invention. FIG. 7 is a cross-sectional view showing an example in which a plate spring is provided in a brush member according to the present invention and the operating state accordingly. FIG. 8 is a cross-sectional view showing an example in which a fluid guide projection is provided on a brush member in the present invention and the fluid flow accordingly. Specific details for implementing the invention
[0044] Hereinafter, the leak detection device for water supply network management based on the block system of the present invention will be described in detail with reference to the attached drawings.
[0045] The attached drawings are illustrated for the purpose of understanding the present invention, and the present invention is not to be limited by the attached drawings.
[0047] The leak detection device for managing a water supply network based on a block system of the present invention is largely composed of a main body (10), a rear tube case (20), a front tube case (30), an outer discharge control valve (40), a rotary housing (50), a rotary driving device (60), a brush member (70), a Coanda nozzle (80), a joint unit (90), a front detection device (100), and a precision detection device (110), and may further be provided with a control device (120) for controlling components that operate according to power application.
[0049] The main body (10), which is a component of the present invention, is as shown in FIGS. 1 to 3.
[0050] It is composed of a body part (10a) and a rear connecting part (10b) and a front connecting part (10c) formed to extend on both sides of the body part (10a).
[0051] At this time, the rear connecting part (10b) and the front connecting part (10c) serve as a shaft for connecting to the rear tube case (20), the front tube case (30), etc., so their outer diameters are relatively small, and the body part (10a) must form a buffer space between itself and the rotating housing (50) where high-pressure gas temporarily stays, so it is desirable to have a relatively large outer diameter so as to be as close as possible to the rotating housing (50).
[0052] At the end of the rear connecting part (10b) of the main body (10), a gas inlet (11) into which high-pressure gas supplied from the outside is introduced and an exhaust port (12) for allowing gas discharged from the rear tube case (20) to be discharged to the outside are formed spaced apart from each other.
[0053] It is preferable that the gas inlet (11) be connected to the compressor (130) via piping as shown in FIG. 5, and the exhaust port (12) be connected to the suction pump (140) via piping so that gas can be forcibly discharged from the rear tube case (20) and the front tube case (30).
[0054] A supply air passage (11a) is formed inside the body part (10a), rear connecting part (10b), and front connecting part (10c) constituting the main body (10), through which gas introduced through the gas inlet (11) moves.
[0055] In the drawing, the air supply passage (11a) is composed of a main passage extending in a straight line forward from the gas inlet (11) and a branch passage branching from the main passage toward the outer surface of the main body (10).
[0056] At this time, a control valve (solenoid valve, actuator valve) is installed in each branched passage to control the opening and closing of high-pressure gas and control the amount of opening and closing.
[0057] Specifically, on the outer surface of the body part (10a), rear connecting part (10b), and front connecting part (10c), a body supply valve (11b), a rear supply valve (11c), and a front supply valve (11d) are respectively installed to control the opening and closing of high-pressure gas moving along the supply passage (11a) and to control the amount of opening and closing.
[0058] The body supply valve (11b) is for controlling the supply (opening / closing, supply amount control) of high-pressure gas to the Coanda nozzle (80), and the rear supply valve (11c) and the front supply valve (11d) are for controlling the supply of high-pressure gas to the rear tube case (20) and the front tube case (30).
[0059] The drawing shows that a number of branch passages are formed in the main body (10a), and a main body supply valve (11b) is formed in each branch passage. This is for the convenience of understanding, and the number or location of the branch passages and main body supply valves (11b) are not limited to the drawing. It is possible to configure various known passages and valves as long as high-pressure gas can be discharged to the outer surface of the main body (10a).
[0060] Meanwhile, a tube exhaust passage (12a) connected to the exhaust port (12) is formed inside the body part (10a), rear connecting part (10b), and front connecting part (10c).
[0061] The tube exhaust passage (12a) is formed separately from the air supply passage (11a).
[0062] The tube exhaust passage (12a) is also composed of a main passage extending in a straight line from the exhaust port (12) toward the front and a branch passage branched from the main passage, and a rear exhaust valve (12b) and a front exhaust valve (12c) are respectively installed on the outer surface of the rear connection part (10b) and the front connection part (10c) to control the opening and closing of the gas to be discharged into the tube exhaust passage (12a) and to control the amount of opening and closing.
[0063] It is preferable that the rear exhaust valve (12b) and the front exhaust valve (12c) are also configured as control valves, just like the body supply valve (11b), the rear supply valve (11c), and the front supply valve (11d) described above.
[0064] The rear exhaust valve (12b) and the front exhaust valve (12c) are for exhausting the gas filled in the rear tube case (20) and the front tube case (30).
[0065] As shown in the drawing, a head member (14) can be fastened to the end of the front connecting part (10c) of the main body (10) configured as above by a screw connection method or a bolt connection method.
[0066] At this time, as described above, an extended air supply passage (14a) is formed that is connected from the front end of the head member (14) to the air supply passage (11a) inside the front connection part (10c), and an auxiliary air supply valve (14b) that controls the opening and closing of high-pressure gas and controls the amount of opening and closing may be installed at the end of the extended air supply passage (14a).
[0067] When the auxiliary air supply valve (14b) is switched to an open state, high-pressure gas is supplied toward the inside of the water pipe (1) in front of the main body (10) to remove scale, etc. inside the water pipe (1) in front of the leak detection device of the present invention, thereby suppressing the obstruction of movement of the leak detection device and improving the accuracy of leak detection through primary scale removal.
[0068] At this time, a known nozzle for controlling the spray range or spray amount may be installed on the end side of the auxiliary air supply valve (14b).
[0069] Meanwhile, as described above, the gas inlet (11) is connected to a pipe for the inflow of high-pressure gas and a pipe for the exhaust of gas, and the main body (10) is configured to move inside the water pipe (1). As the distance to be moved increases and there are many sections where the direction changes during movement, the twisting of these pipes may occur, which may hinder movement.
[0070] As a measure to prevent this, it is preferable that the pipe connected to the gas inlet (11) and the pipe connected to the exhaust port (12) be connected to the main body (10) through a rotary joint such as a swivel joint.
[0071] However, even in this case, the pipes for supply and exhaust may become tangled with each other.
[0072] To prevent this, as shown in FIG. 2, a gas inlet (11) and an exhaust port (12) are spaced apart from each other at the end of the rear connecting part (10b), and a tubular supply connecting part (13a) that is fitted into the gas inlet (11) is formed to protrude in the front and rear directions, and an exhaust connecting part (13c) that forms an exhaust space (13b) between the supply connecting part (13a) and the inner wall is formed, and the bottom surface between the supply connecting part (13a) and the exhaust connecting part (13c) is formed to communicate with the exhaust port (12), so that the gas inlet (11) is internally connected to the supply connecting part (13a) and the exhaust port (12) is connected to the exhaust space (13b), thereby providing a rear connecting member (13).
[0073] At this time, as shown in the illustration, a packing (not indicated in the drawing) and a bearing (not indicated in the drawing) are installed on the rear inner surface of the supply connection part (13a) and the inner surface of the exhaust connection part (13c), respectively, and are connected so as to be freely rotatable through the joint unit (90) and the bearing.
[0075] The joint unit (90), which is a component of the present invention disclosed in the drawing, is connected to the main body (10) through the rear connecting member (13). More specifically, a high-pressure gas supply unit (91) is formed on the inside and is fitted together with the supply connection unit (13a) to supply high-pressure gas to the gas inlet (11), and on the outside, a gas discharge unit (92) is formed and is fitted together with the exhaust connection unit (13c) to allow gas discharged through the exhaust space (13b) which is connected to the exhaust port (12) to pass through.
[0076] The gas discharge section (92) and the high-pressure gas supply section (91) are connected through a connecting member, and the joint unit (90) is rotatably connected to the rear connecting member (13) by installing the aforementioned packing and bearing on the outer surface of the high-pressure gas supply section (91) and the outer surface of the gas discharge section (92), respectively.
[0077] Meanwhile, the outer side of this joint unit (90) takes the shape of a flange, and a pipe connection can be made by bolting together the flange of the end of a flexible double pipe (90a), in which a high-pressure supply pipe (90b) is located on the inner side and a discharge pipe (90c) is located on the outer side of the high-pressure supply pipe (90b).
[0078] This double pipe (90a) can be connected to a compressor (130) or a suction pump (140) on the outside, separated from each other without twisting through a known part such as a rotary joint.
[0079] The compressor (130) or suction pump (140) may be configured to be operated by the operator, or may be configured to be electrically connected to and controlled by the control device (120) described later.
[0081] The rear tube case (20), which is a component of the present invention, takes the form of a cylinder as shown in FIGS. 1, 3, etc., and has a rear fitting through hole (21) formed in the center so that the rear connecting part (10b) is fitted inwardly and connected.
[0082] As shown in FIG. 3, the outer diameter of this rear tube case (20) is larger than the outer diameter of the body part (10a), and a rear step (20a) is formed to protrude forward at the point where it meets the body part (10a).
[0083] As a rear step (20a) is formed along the circumference of the front side of the rear tube case (20) formed in a cylindrical shape, a gear installation space (20b) is formed in the front central side of the rear tube case (20) surrounded by the rear step (20a) to install gears that are components of the rotary drive device (60).
[0084] Meanwhile, the rear tube case (20) is characterized by having a rear sealing tube (22) installed on its outer surface that expands and contracts according to the supply and discharge of gas.
[0085] For air supply and exhaust for such expansion and contraction, a rear connecting passage (23) is independently formed inside the rear tube case (20) to connect the rear sealing tube (22), the rear supply valve (11c), and the rear exhaust valve (12b), respectively.
[0086] Additionally, for the discharge of water in the water pipe (1) between the rear tube case (20) and the front tube case (30), a rear outer exhaust pipe (24) is installed in the rear tube case (20) through the rear sealing tube (22), which is connected from the rear step (20a) to the rear end.
[0087] At this time, the rear outer exhaust pipe (24) is preferably formed on the lower rear step (20a) of the rear tube case (20) as shown in the drawing, and may also be installed on the upper side along the circumference of the rear tube case (20) as needed.
[0089] The front tube case (30), which is a component of the present invention, is installed opposite the rear tube case (20) based on the body portion (10a) of the main body (10), and a front sealing tube (32) that contracts and expands according to the supply and discharge of high-pressure gas is also installed.
[0090] As shown in the illustration, the front tube case (30) for this purpose has a front insertion through hole (31) formed in the center so that the front connecting part (10c) is inserted inwardly and connected.
[0091] In addition, the front tube case (30) also has an outer diameter larger than that of the body part (10a), so that a front step (30a) is formed to protrude toward the rear at the point where it meets the body part (10a).
[0092] In addition, as the front step (30a) is formed to protrude toward the rear side, a front installation space (30b) is formed in the rear central side surrounded by the front step (30a).
[0093] In addition, a front sealing tube (32) that expands and contracts along the outer surface according to gas supply and discharge, similar to the rear tube case (20), is installed, and a front connecting passage (33) that connects the front sealing tube (32), the front supply valve (11d), and the front exhaust valve (12c) is independently formed inside.
[0094] In addition, a front outer exhaust pipe (34) connected from the front step (30a) to the front end is installed through the front sealing tube (32).
[0095] In the rear tube case (20) and front tube case (30) configured as described above, when the rear air supply valve (11c) and the front air supply valve (11d) are open, high-pressure gas is supplied into the interior, causing the rear sealing tube (22) and the front sealing tube (32) to expand and adhere to the inner surface of the water pipe (1), thereby inducing the space between the two tubes to be isolated from the outside.
[0096] In this state, when the body supply valve (11b) and discharge control valve (40) of the aforementioned main body (10) are opened, high-pressure gas is supplied between the two tubes, causing the internal pressure to increase. Consequently, water between the two tubes is discharged to the outside of the tubes through the opened discharge control valve (40), thereby enabling precise dry leak detection in the space between the tubes.
[0098] The outer discharge control valve (40), which is a component of the present invention, is installed in the rear outer discharge pipe (24) of the rear tube case (20) and the front outer discharge pipe (34) of the front tube case (30), respectively, as shown in the drawing, and is configured to control the amount of fluid discharged in the outer direction while blocking the fluid flow in the inner direction relative to the body part (10).
[0099] For this purpose, there are control valves equipped with a backflow prevention function (solenoid valves, actuator valves).
[0100] The outer discharge control valve (40) allows the water filled in the space between the two tubes to be discharged smoothly, so that leak detection in the space between the tubes can be performed in a dry state.
[0102] As shown in FIGS. 1 to 3, the rotating housing (50), which is a component of the present invention, is composed of a rotating tube body (51) that surrounds the body part (10a) and side wall parts (52) on the left and right sides thereof, and it is preferable that the side wall parts (52) be detachable and bolted to the rotating tube body (51) for ease of assembly and installation.
[0103] More specifically, the inner surface of the rotating tube (51) is spaced apart from the outer surface of the body part (10a) to form a buffer space (53) in which high-pressure gas discharged from the body supply valve (11b) temporarily stays between the outer surface of the body part (10a) and the inner surface, and a nozzle installation cut-out (51a) and a brush installation cut-out (51b) are formed adjacently along the longitudinal direction.
[0104] At this time, it is preferable that the brush installation cut portion (51b) be positioned so as to correspond to the front relative to the rotational direction of the rotating housing (50), so that brushing is performed preferentially in the rotational direction.
[0105] The side wall portion (52) is connected to both the front and rear ends of the rotating tube body (51), and its outer surface is rotatably fitted onto the rear step (20a) of the rear tube case (20) and the front step (30a) of the front tube case (30).
[0106] To this end, it is preferable that packing (not shown in the drawing) and bearings (not shown in the drawing) be installed on the upper surface of the side wall (52) and on the lower portions of the rear step (20a) and the front step (30a) as shown in the drawing.
[0107] Meanwhile, a through hole (52a) is formed in the center of the side wall (52) through which the rear connecting part (10b) and the front connecting part (10c) respectively pass, and is rotatably connected to the main body (10).
[0108] To this end, it is preferable that packing and bearings be installed in the same manner between the inner surface of the through hole (52a) and the outer surface of the rear connecting part (10b) and the front connecting part (10c).
[0109] This rotating housing (50) is designed to allow the brush member (70) and the Coanda nozzle (80) to rotate along the inner surface of the water pipe (1), thereby brushing and removing foreign matter from the inner surface of the water pipe (1), which increases the accuracy of leak detection and enables detection without blind spots.
[0111] The rotary drive device (60), which is a component of the present invention, is configured to rotate the rotary housing (50) around the center of the main body (10) and is composed of an internal gear (61), an external gear (62), and a drive motor (63) as shown in FIGS. 1 and 3.
[0112] As shown in the drawing, the internal gear (61) is installed around the rear side wall (52) of the rotating housing (50) and is formed in the shape of a ring with gear teeth on its inner surface.
[0113] The external gear (62) is installed in the gear installation space (20b) of the rear tube case (20) and is formed in a cylindrical shape having gear teeth on its outer surface that mesh with the internal gear (61) to rotate the rotating housing (50) connected to the internal gear (61).
[0114] The drive motor (63) is connected to the external gear (62) via a gear shaft to rotate the external gear (62). Although the drawing shows the drive motor (63) installed on the outside of the rear tube case (20) with the gear shaft penetrating the rear tube case (20), the location is shown for ease of understanding and may be installed inside the gear installation space (20b).
[0115] Additionally, the rotary drive device (60) is not limited to a method in which two gears mesh as shown in the drawing, and may be replaced with various power transmission methods such as chains, belts, etc.
[0117] The brush member (70), which is a component of the present invention, is composed of a brush housing (71) that is fitted into the brush installation cutout (51b) as shown in FIGS. 1 to 3, and a brush bristles (72) that are connected to the brush housing (71) at one end and configured to brush foreign substances on the inner wall surface of the water pipe.
[0118] These brush members (70) remove scale from the inner surface of the water pipe (1), thereby improving the accuracy of leak detection.
[0119] At this time, the outer diameter of the rotating housing (50) of the leak detection device of the present invention is preferably formed close to the inner diameter of the water pipe (1) to enhance the Coanda effect, whereas it is preferable to be spaced apart from the inner diameter of the water pipe (1) for smooth movement within the water pipe (1).
[0120] However, when configured as described below, if the upper height of the brush bristles (72) is fixed based on the point connected to the rotating housing (50), a phenomenon may occur where smooth brushing cannot be achieved due to wear of the brush bristles (72), thickness of the internal scale layer, etc.
[0121] Considering these points, it is preferable that the brush bristles (72) be configured so that their height can be adjusted elastically.
[0122] The configuration for this is illustrated in Fig. 7.
[0123] The brush housing (71) of the drawing is composed of a lower housing (71a) and an upper housing (71b), and is further equipped with a plate spring (73).
[0124] As shown in the drawing, the lower housing (71a) has its upper portion fitted into the brush installation cutout (51b) and its lower portion extends to the bottom of the rotating tube body (51) around the brush installation cutout (51b) and is bolted to the rotating tube body (51). Side walls (71m) are formed to protrude upward on both the left and right sides, and a downward step (71g) is formed between the two side walls (71m), and a lower installation space (71f) is formed between the two steps (71g).
[0125] Additionally, a spring insertion groove (71c) is formed in the lower part of both steps (71g) in an outer horizontal direction, and a guide projection (71d) is formed protruding upward on the upper part of both side walls (71m).
[0126] The upper housing (71b) has columns (71h) corresponding to the side walls (71m) formed to protrude downward on both sides, and the columns (71h) have protrusion insertion grooves (71e) formed therein so that the guide protrusions (71d) are fitted into them and connected to the lower housing (71a) so as to be movable upward.
[0127] At this time, it is preferable that the lower part of the projection insertion groove (71e) be narrow and the upper part of the guide projection (71d) be wide so that the wider upper part catches on the lower part of the projection insertion groove (71e) to prevent the upper housing (71b) from moving upward.
[0128] Additionally, an upper installation space (71k) is formed between the two pillars (71h), and the brush bristles (72) are installed on the upper surface.
[0129] The plate spring (73) has a plate-like shape with both ends inserted into the spring insertion groove (71c) and installed inside the lower installation space (71f) and the upper installation space (71k), and the central part is formed convexly upward to provide elasticity that pushes the bottom of the upper installation space (71k) upward.
[0130] This configuration allows the upper housing (71b) to move upward due to the elasticity of the leaf spring (73) when there are elements such as scale or pipe deformation on the inner surface of the water pipe (1), and when this pressure is relieved, the upper housing (71b) moves downward due to the upper pressure, and when this pressure is relieved, it moves upward so that the brush bristles (72) can brush the inner surface of the water pipe (1).
[0131] Meanwhile, the high-pressure gas sprayed from the Coanda nozzle (80) moves along the surface of the rotating housing (50), and some of it is discharged through the outer discharge control valve (40), so the flow is weakened while it reaches the original Coanda nozzle (80), and thus there is little chance of a vortex collision with the high-pressure gas just ejected from the Coanda nozzle (80).
[0132] However, due to the characteristics of the installation location of the outer discharge control valve (40), there is a high possibility of vortex collision in the area between the two outer discharge control valves (40).
[0133] In addition, depending on the operation, high pressure may be supplied while the outer discharge control valve (40) is closed (during precise leak detection), but in this case, a phenomenon may occur where the Coanda effect cannot be induced due to vortex collision (problems with the failure to induce the Coanda effect are described above).
[0134] Accordingly, it is desirable to minimize vortex collisions between the gas moving along the surface of the rotating housing (50) and returning to the Coanda nozzle (80) and the high-pressure gas discharged from the membrane nozzle.
[0135] To this end, as shown in FIG. 8, a fluid guide projection (74) may be formed on the upper surface of the brush housing (71), with a portion corresponding to the front relative to the rotational direction of the rotating tube (51) protruding upward toward the surface of the water pipe (1).
[0136] These fluid guide protrusions (74) guide the high-pressure gas moving through the Coanda nozzle (80) to the surface of the rotating pipe (51) to flow temporarily along the inner surface of the water pipe (1), thereby suppressing collision with the high-pressure gas discharged from the high-pressure outlet (82) of the Coanda nozzle (80).
[0138] The Coanda nozzle (80), which is a component of the present invention, is a major component of the present invention that removes foreign substances while minimizing damage to the inner surface of the water pipe (1), thereby increasing the efficiency of leak detection and minimizing the risk of the pipe being damaged during the inspection.
[0139] In addition, if there are points where there are micro-cracks but no actual leakage occurs due to foreign matter, the condition is diagnosed by removing the foreign matter with negative pressure, thereby preventing the expansion of the cracks and suppressing the increase in the difficulty and workload of subsequent work such as pipe repair.
[0140] For example, if a small gap occurs in the water pipe (1) and the ground layer above the water pipe (1) blocks the gap, and the gap expands instantaneously, soil is pushed into the water pipe (1), causing the gap in the water pipe (1) to expand and the inside of the pipe to become filled with soil, and the ground layer above the water pipe (1) becomes hollow. To solve this, the ground layer above the water pipe (1) must be excavated and removed, a hole must be made in the water pipe (1) to clean the inside, the water pipe (1) must be blocked, and then soil must be filled and compacted on top of the water pipe (1) again, which increases the scale of the construction.
[0141] However, when scale or foreign matter on the inner surface of the water pipe (1) is gently removed by the brush member (70) and suction pressure is applied by the Coanda nozzle (80) rather than impact pressure where high pressure strikes the inner surface of the pipe (at this time, the suction pressure is not very high because it is generated by the flow of high-pressure fluid along the outer surface of the rotating housing), damage to the inner surface of the pipe can be minimized, so when a crack or broken point is discovered, or an abnormal sign suggesting such a point is discovered, the detection point is confirmed and the pipe repair work can be carried out immediately while stopping the detection.
[0142] In particular, since internal pipe damage is suppressed, the application of endoscopic pipe repair becomes easier.
[0143] As shown in FIGS. 1, 2, etc., the Coanda nozzle (80) for this purpose has its body fitted into the nozzle installation cut-out (51a) and fastened through fastening bolts, etc., with its upper surface facing the inner surface of the water pipe (1).
[0144] A high-pressure supply port (81) is formed at the lower part of the Coanda nozzle (80) in communication with the buffer space (53) so that high-pressure gas flows into the interior through the buffer space (53), and a high-pressure discharge port (82) is formed on the upper surface facing the water pipe (1) so that the high-pressure gas flowing in through the high-pressure supply port (81) is discharged.
[0145] Additionally, a high-pressure passage (83) is formed inside in a shape inclined toward the inner surface of the water pipe (1) in the opposite direction to the rotation direction of the rotating housing (50) so that high-pressure gas introduced from the high-pressure supply port (81) can move to the high-pressure discharge port (82).
[0146] At this time, a guide projection (83a) is formed at the end of the high-pressure passage (83) connected to the high-pressure discharge port (82) such that the internal flow path cross-sectional area is reduced, and the corner of the wall opposite the guide projection (83a) is formed as a rounded section (83b) so that suction pressure acts in the space between the guide projection (83a) and the inner surface of the water pipe (1).
[0147] That is, the foreign matter on the inner surface of the water pipe (1) is guided from the inner surface of the water pipe (1) to the surface of the rotating housing (50) in the suction pressure acting space.
[0148] Additionally, foreign substances or scale guided to the surface of the rotating housing (50) through the Coanda nozzle (80) are discharged through the outer discharge control valve (40) along with high-pressure gas.
[0150] The front detection device (100), which is a component of the present invention, is installed on the front of the front tube case (30) as shown in FIG. 1, etc., and is configured to detect a point of abnormality in the pipe inside the water pipe (1) on the front side of the front tube case (30).
[0151] The forward detection device (100) for this purpose is configured to scan the internal image or sound of the pipe and to first identify not only the point where leakage is occurring, but also abnormal points where pipe damage is suspected, such as soil inflow, abnormal scale deposition, and pipe wall deformation.
[0152] A specific example of a forward detection device (100) is a visual abnormality detection module composed of a pair of high-resolution front cameras and a lighting device.
[0153] This device can not only detect water leakage but also capture video data of rapid changes in scale accumulated inside pipes or traces of external soil flowing in.
[0154] Alternatively, it may consist of non-contact laser distance measuring sensors such as laser profilers or LiDAR.
[0155] This device can numerically identify points where the circularity of the pipe is broken or where the pipe wall has thinned and bulging has occurred.
[0156] Another device may consist of a multi-frequency acoustic analyzer.
[0157] This device can assess the risk of damage by detecting not only leakage sounds but also resonance sounds caused by soil erosion around the pipe.
[0159] The precision detection device (110), which is a component of the present invention, is installed on any one of the rear step (20a), the front step (30a), and the rotating tube (51) to detect whether there is a leak in the water pipe (1) in the space between the rear contact tube (22) and the front contact tube (32).
[0160] More specifically, the precision detection device (110) is configured such that when a pipe abnormality point occurs in the front according to the detection of the aforementioned front detection device (100), the main body (10) is moved to the point, and the front sealing tube (32) and the rear sealing tube (22) are expanded as described above to prevent water from flowing into the space between the two tubes, and then high-pressure gas is supplied to the inside of the tubes to drain the water between the two tubes, and then the water between the two tubes is detected for leakage on the inner surface of the water pipe (1) between the two tubes.
[0161] The precision detection device (110) for this purpose may be configured to include, either optionally or all of the following: a laser profiler (111) that irradiates a laser onto the inner surface of the water pipe (1) to formulate changes in roundness and corrosion depth of the inner surface of the water pipe (1) as shown in FIG. 5; an encoder (112) that measures the distance traveled by the main body (10); an eddy current sensor (113) that coordinates the location of micro-cracks inside the pipe in conjunction with the encoder (112); a thermal mass flow meter (114) that measures the mass of air supplied to the gas inlet (11) to quantitatively calculate the amount of leakage; and a central camera (115) that photographs the inner surface of the water pipe (1) between the two tubes to obtain image data.
[0162] As illustrated, the laser profiler (111) and the eddy current sensor (113) may be installed on the surface of the rotating housing (50), the rear step (20a) of the rear tube case (20), or the front step (30a) of the front tube case (30), and the encoder (112) may be installed at the tip of the head member (14), and the thermal mass flow meter (114) may be installed in the high-pressure supply pipe (90b) or in the external piping connected to the high-pressure supply pipe (90b).
[0163] More specifically, the laser profiler (111) can be configured to scan the three-dimensional shape of the inner wall of the pipe by irradiating a laser beam toward the inner surface of the water pipe (1) in conjunction with the rotation of the rotating body (51) and collecting the reflected signal.
[0164] By comparing scanned image data with cross-sectional shape data at the time of design, the degree of deformation of the pipe body due to external pressure or ground subsidence can be quantified and used as an indicator to predict the risk of structural collapse of the pipe body in advance.
[0165] In addition, by analyzing scanned cross-sectional data and measuring the amount of thickness reduction due to corrosion and wear revealed after scale removal on the inner wall of the pipe, the degree of aging of the block can be precisely evaluated.
[0166] The encoder (112) and eddy current sensor (113) can map the location of the microcracks.
[0167] The encoder (112) and eddy current sensor (113) can be configured to create a defect map inside the pipeline through mutual data synchronization.
[0168] The encoder (112) calculates the unwinding length of the traction wire according to the movement of the main body (10) to calculate the current position of the device in real time, and the eddy current sensor (113) forms an electromagnetic field on the inner wall of the tube to detect micro-cracks or changes in the characteristics of the metal material inside the tube that are difficult to see with the naked eye.
[0169] By combining the encoder position value at the moment a defect signal is detected by the eddy current sensor and the rotation angle of the rotating tube (51), the 'end position and orientation' of a specific point within the water pipe (1) can be accurately specified as coordinates.
[0170] The above thermal mass flow meter (114) can measure the scale of leakage by analyzing the flow of gas supplied into a closed section.
[0171] Unlike a general volumetric flow meter, the thermal mass flow meter (114) measures a 'mass' unit that is not sensitive to changes in temperature and pressure, so precise measurement is possible even in an environment where high-pressure gas is injected.
[0172] With the space between the two tubes completely sealed and the water discharged, the mass of the gas continuously flowing in to maintain a specific pressure is measured.
[0173] If there is a damaged part (leakage point) in the section, gas will leak out through the gap, and since the amount of gas inflow measured by the flow meter converges to the amount of gas outflowing through the damaged part, the amount of micro-leakage can be quantified in liters or grams.
[0175] As disclosed in FIG. 5, the leak detection device of the present invention configured as described above is installed inside the water pipe (1) through the inlet (2) while the cover of the inlet (2), which is provided with a cover on the top so that the leak detection device and the traction wire can be inserted on both sides of the water pipe (1), is opened and the shut-off valve (3) provided at the front and rear ends of the inlet (2) is closed. The leak detection device is connected to both sides of the leak detection device and a bobbin (5) capable of pulling the traction wire (4) is installed at both inlets. The traction wire (4) protruding outside the two inlets (2) can be moved forward and backward by selectively pulling or releasing it using a moving device (150), such as an electric winch or a winder.
[0176] The electric winch or winder may be configured to be operated by the operator, or may be configured to be electrically connected to and controlled by the control device (120) described later.
[0177] At this time, the compressor (130) and the suction pump (140) are connected to the main body (10) through piping as described above.
[0178] Alternatively, the internal flow path may be configured such that a high-pressure discharge port is provided at the rear end to allow the leak detection device to advance by the injection of high-pressure gas, thereby enabling it to advance according to the high-pressure supply.
[0179] In this case, when high pressure is supplied to the tube, it can be floated inside the water pipe (1) and move without being blocked in the pipe.
[0180] In addition to this, it can be configured to move via various means of transportation announced.
[0182] The present invention may be equipped with a control device (120) for controlling the operation of the various valves, motors, and detection devices described above.
[0183] The control device (120), which is a component of the present invention, is configured to control the operation of each device by being electrically connected to the body supply valve (11b), rear supply valve (11c), front supply valve (11d), rear exhaust valve (12b), front exhaust valve (12c), auxiliary supply valve (14b) of the main body (10), the drive motor (63) of the rotary drive device (60), the outer discharge control valve (40), the front detection device (100), and the precision detection device (110).
[0184] Additionally, it may be configured to be electrically connected to a compressor (130) and a suction pump (140) to control their operation, or connected to a moving device (150) to move the main body (10) forward or backward inside the water pipe (1).
[0185] This control device (120) may be installed in the aforementioned front installation space (30b) and may be connected via a power line and located outside the water pipe (1).
[0186] A specific control example of the control device (120) is shown in FIG. 5.
[0187] First, during basic operation, the compressor (130) is stopped, or the rear supply valve (11c) and the front supply valve (11d) are blocked, and the suction pump (140) is operated with the rear exhaust valve (12b) and the front exhaust valve (12c) open so that the front sealing tube (32) and the rear sealing tube (22) are contracted, thereby adjusting the state so that they can move inside the water pipe (1).
[0188] In this state, the auxiliary air supply valve (14b) is opened and an operating signal is applied to the forward detection device (100).
[0189] When the auxiliary supply valve (14b) is opened, scale or foreign matter on the inner surface of the water pipe (1) in front is removed.
[0190] Additionally, the activated forward detection device (100) collects sound or images from the front in real time and provides the collected data to the control device (120), and the control device (120) determines whether there is an abnormality in real time through the collected data.
[0191] The determination of whether an anomaly exists can typically be made based on the difference from the average collected data (determined through a storage unit that stores collected data, an average value derivation unit that derives the average value of the collected data, and a reading unit that reads whether an anomaly exists by comparing newly collected data with the collected data of the average value derivation unit).
[0192] In addition, a person may make a determination in a control room connected to the control device (120) via a wired or wireless communication network. (The control device includes a known communication module for this purpose.)
[0193] Meanwhile, while driving as described above and detecting the front, the control device (120) can provide a signal to the drive motor (63) to rotate at a low speed, thereby causing the rotating housing (50) to rotate at a low speed by the operation of the drive motor (63).
[0194] In this case, the forward detection device (100) rotates and can evenly scan and detect the entire surface in front of the pipe.
[0195] Additionally, during driving, the body supply valve (11b) may be intermittently opened to push out floating debris from the Coanda nozzle (80) or to clean the sensor window.
[0196] Meanwhile, when the forward signal exceeds a threshold value as a result of forward detection through the forward detection device (100), the control device (120) sends a blocking signal to the auxiliary supply valve (14b) to block the valve, then sends a closing signal to the rear exhaust valve (12b) and the front exhaust valve (12c), and then sends an opening signal to the body supply valve (11b), the rear supply valve (11c), and the front supply valve (11d) to expand both tubes and supply high-pressure air into the space between the two tubes.
[0197] In addition, an opening signal is sent to the outer discharge control valve (40) so that water in the space between the tubes is discharged through the outer discharge control valve (40) according to the pressure between the tubes, thereby inducing the space between the tubes to become a dry space.
[0198] Then, as shown in the third drawing from the top of Fig. 6, the drive motor (63) is operated to rotate the rotating housing (50).
[0199] As the rotating housing (50) rotates, the brush member (70) and the Coanda nozzle (80) rotate together with the rotating housing (50) to brush the inner surface of the water pipe (1) and remove scale and foreign matter from the inner wall surface of the pipe through negative pressure.
[0200] At this time, the outer discharge control valve (40) can be opened so that the cleaned scale and foreign matter can be discharged to the outside.
[0201] Next, the control device (100) activates the laser profiler (111), eddy current sensor (113), and encoder (112) that constitute the precision detection device (110) to rotate together with the rotating housing (50) and 3D scan the thickness change of the pipe wall, crack coordinates, and power diagram.
[0202] The eddy current sensor detects microcracks or thickness changes occurring in the pipe by forming an electromagnetic field on the inner wall of the metal pipe, and the laser profiler measures changes in the pipe's roundness and corrosion depth by irradiating a laser onto the inner surface of the pipe, and formulates the degree of deformation at the leaking area or the depth of holes caused by corrosion to provide 3D scan data of the damage status at the location, going beyond simply determining whether there is a leak.
[0203] In addition, a high-pressure supply pipe (90b) or a thermal mass flow meter (114) connected to the high-pressure supply pipe (90b) is activated to measure the mass of air escaping from the space between the tubes and to calculate the actual amount of water leaking.
[0204] In this case, it is preferable for the control device (120) to temporarily block the outer discharge control valve (40).
[0205] The activated encoder (112) is linked with the eddy current sensor (113) to generate coordinate data for the exact location of the crack occurrence point.
[0206] The control device (120) generates precise coordinates, such as distance and direction from the entrance, by matching the accumulated travel distance value of the encoder (112) with the rotation angle at which the peak signal of the eddy current sensor (113) is generated, and provides them to a control server, etc. through the aforementioned communication module, etc.
[0207] When the above process is completed, the control device (120) controls the blocking of the body supply valve (11b), rear supply valve (11c), and front supply valve (11d), and as shown at the bottom of FIG. 6, the front supply valve (11d) and rear exhaust valve (12b) are opened, and as the suction pump (140) is operated, the tubes on both sides contract so that the main body (10) can move inside the water pipe (1), and the aforementioned front traction wire (4) pulls the main body (10) so that the main body (10) moves forward.
[0208] At this time, when the movement state is reached, the control of the control device (120) is restarted as shown in the upper drawing of Fig. 6, and a leak detection in the front is performed.
[0209] That is, the control device (120) provides an opening signal to the rear air supply valve (11c) and the front air supply valve (11d) only after acquiring a front leak detection signal through the front detection device (100), thereby inflating the rear sealing tube (22) and the front sealing tube (32), so that selective isolation and precise diagnosis procedures are performed only at the leak point that was initially confirmed, thereby preventing unnecessary repetitive work on the entire pipeline and maximizing the time and energy efficiency of the exploration process.
[0211] A leak detection device (200) for water supply network management based on a block system configured as described above can be configured to have a block system-based water supply network management and diagnosis system connected through a wired / wireless communication network (600) with a network management server (300) and a user terminal (400) shown in FIG. 9.
[0212] Looking at the drawing, it can be seen that the control unit (120) of the leak detection device (200) is composed of a valve control unit (121) that controls the operation of valves (11b, 11c, 11d, 12b, 12c, 14b, 40), a rotation control unit (122) that controls the operation of a drive motor (63), a detection control unit (123) that controls the operation of a forward detection device (100) and a precision detection device (110), a fluid control unit (124) that controls the operation of a compressor (130) and a suction pump (140), a movement control unit (125) that controls the operation of a movement device (150), and a communication unit (126) that communicates with a pipe network management server (300).
[0213] The monitoring management server (300) is connected to the leak detection device (200) via a wired / wireless communication network (600), receives data detected by the composite leak detection device (200) through detection by the forward detection device (100) and the precision detection device (110), diagnoses the amount of leakage, the number of leakage points, and the degree of leakage risk, and compares the diagnosed data with pre-set reference value data to determine the diagnosis result of the corresponding block water pipe (1) as one of the grades of maintenance, repair, partial replacement, or full reinstallation.
[0214] The network management server (300) for this purpose may be composed of a data reception and storage unit (310), a leakage data analysis unit (320), a collapse risk identification unit (330), a pipeline condition diagnosis unit (340), and a device control and alarm unit (350).
[0215] The data receiving and storage unit (310) is configured to receive and store data detected by the forward detection device (100) and the precision detection device (110).
[0216] The device control and alarm unit (350) communicates with the valve control unit (121), rotation control unit (122), detection control unit (123), fluid control unit (124), and movement control unit (125) of the control device (120) through the communication unit (126) and the wired / wireless communication network (600) to control the operation of each control unit, and communicates with the user terminal (400) through the wired / wireless communication network (600) to provide various alarms.
[0217] Additionally, the leak data analysis unit (320) analyzes the data provided by the forward detection device (100) and the precision detection device (110) stored in the data reception and storage unit (310) to analyze and process the data related to the leak.
[0218] In addition, the pipeline condition diagnosis unit (340) diagnoses the pipeline condition through the data analyzed by the leakage data analysis unit (320).
[0219] At this time, a reference value is stored through the manual setting value of the user terminal (400), and the pipe condition can be diagnosed by comparing it with this reference value.
[0220] Additionally, the collapse risk identification unit (330) identifies potential collapse risks by comparing and analyzing data stored in the data reception and storage unit (310), more specifically, video data captured by the central camera (115), with standard values such as user-specified values, and if a potential collapse point is identified, it is configured to provide a 'pipeline protection mode' signal to the control device (120) of the composite leak detection device (200).
[0221] The user terminal (400) is connected to the above-mentioned network management server (300) via a wired / wireless communication network (600) and is configured to connect to the network management server (300) and output leak-related information data stored in the above-mentioned network management server (300).
[0222] That is, the user terminal (400) receives grade data of maintenance, repair, partial replacement, or full reinstallation by block diagnosed by the water network management server (300) and decides whether to maintain, repair, partially replace, or fully reinstall the water supply network of the corresponding block.
[0223] At this time, it is obvious that the user terminal (400) and the observation network management server (300) may provide the various services described above together with the various geographic information provided by the GIS server (500) by linking with the GIS (Geographic Information System) server (500) through the wired / wireless communication network (600).
[0224] Meanwhile, the aforementioned leak detection device (200) is configured not only to simply detect the inner surface of the water pipe (1) at the location point, but also to remove foreign matter from the inner surface of the water pipe (1) to increase detection accuracy.
[0225] However, in a state of equilibrium where the water pipe (1) is damaged and foreign matter is stuck in the damaged area, and the water inside the water pipe (1) does not flow out to the outside due to external pressure or only a very small amount of leakage occurs and foreign matter does not enter the inside, if this equilibrium is broken during the process of removing foreign matter and foreign matter enters the pipe through the gap and blocks the water pipe, a phenomenon may occur in which the complex leak detection device (200) inside the pipe cannot be recovered.
[0226] To prevent such phenomena, the precision detection device (110) of the above-mentioned composite leak detection device (200) is preferably configured to include a central camera (115) capable of visualizing the inner surface of the water pipe (1) facing the location point, and is preferably configured to transmit the captured image to the water network management server (300) in real time through the communication unit (126).
[0227] At this time, the pipe network management server (300) is configured such that the collapse risk identification unit (330) analyzes the central camera (115) image data transmitted in real time from the composite leak detection device (200) to identify potential collapse points where there is a possibility of collapse of the pipe, and when a potential collapse point is identified through the identification of the collapse risk identification unit (330), it provides a 'pipeline protection mode' signal to the control device (120) of the composite leak detection device (200).
[0228] Here, the 'pipeline protection mode' signal corresponds to stopping the operation of removing foreign substances, that is, the movement of stimulating the water pipe (1) located by the complex leak detection device (200).
[0229] Accordingly, the control device (120) that receives the 'pipeline protection mode' signal stops the foreign matter removal operation.
[0230] The 'pipeline protection board' signal may be provided as a simple alarm signal, and the signal may be provided to the device control and alarm unit (350) of the pipe network management server (300). The device control and alarm unit (350) may send a control signal to each detailed component of the control device (120) based on the provided signal, so that the sub-components of the control device (120) can control each component of the complex leak detection device (200) based on the provided control signal.
[0231] More preferably, when the device control and alarm unit (350) receives a 'pipeline protection mode' signal, it can transmit signals to the movement control unit (125), fluid control unit (124), and rotation control unit (122) so that the movement of the composite leak detection device (200) is stopped, the rotation of the rotating housing (50) is stopped, and the supply of high-pressure gas is stopped.
[0232] Meanwhile, if the complex leak detection device (200) is unconditionally removed from the pipeline after the foreign matter removal operation is stopped by identifying a potential collapse point, it becomes difficult to effectively diagnose the entire pipeline.
[0233] Taking these points into account, it is more efficient to determine whether the potential collapse point is likely to collapse immediately, and then decide whether to continue detecting the area in front of it or to remove the complex leak detection device (200) from the pipe.
[0234] To this end, it is preferable that the control device (120) be configured to continuously monitor whether there is an immediate possibility of collapse at a corresponding point through the precision detection device (110) while its movement is stopped during a preset pipe stabilization threshold time in a state where operation is stopped by the 'pipeline protection mode' signal.
[0235] More preferably, the removal of foreign matter from the inner surface of the water pipe (1) is stopped, and a waiting period (stabilization critical time) is maintained while performing precise detection using other means for a certain period. If it is determined that no signs of collapse are visible during the critical time, the driving risk is considered low, and the moving device (150) is controlled to move the composite leak detection device (200) forward to resume exploration of the subsequent point. Conversely, if it is determined that signs of collapse are visible within the critical time, the moving device (150) is driven in the reverse direction to move the composite leak detection device (200) backward, thereby discharging it outside the pipe.
[0236] When moving backward due to signs of collapse, the control device (200) provides a signal to the observation network management server (300) that backward movement is taking place, and the observation network management server (300) immediately provides this signal to the user terminal (400), thereby allowing the user to immediately close the point and perform subsequent processing including detailed investigation and repair.
[0237] The diagnosis of the possibility of immediate collapse may be performed by the control device (120), or the data collected from the precision detection device (110) during the stabilization critical time may be transmitted to the network management server (300) so that the network management server (300) can perform the diagnosis.
[0238] When the control device (120) performs a diagnosis, the detection control unit (123) of FIG. 1 can compare the data collected from the precision detection device (110) in real time with a reference value that is pre-set and stored through a user terminal (400), etc. to perform the diagnosis.
[0239] When the observation management server (300) diagnoses, the collapse risk identification unit (330) can diagnose in the same way.
[0240] FIG. 10 illustrates a basic flowchart of the water supply network management and diagnosis system based on the block system of the present invention configured as described above.
[0241] Looking at the drawing, after placing the complex leak detection device (200) in the water pipe within the unit block corresponding to the detection location, the complex leak detection device (200) moves inside the water pipe (1) of the corresponding unit block through user operation or a start signal from the pipe network management server (300).
[0242] Meanwhile, while moving inside the water pipe (1), the forward detection device (100) continuously detects whether there is an abnormality inside the pipe, and if there is no abnormality, it continues to move forward and detect, and if an abnormality in the pipe is determined, it stops moving and stops the complex leak detection device (200).
[0243] At this time, the present invention is characterized by forming an isolated section independent of the pipeline around the location point after the composite leak detection device (200) is stopped.
[0244] Meanwhile, when the complex leak detection device (200) stops, the operation of the precision detection device (110) is initiated to precisely detect information regarding whether there is a leak and the risk of leakage on the inner surface of the water pipe (1) at the isolated location.
[0245] The detected data is transmitted to the monitoring management server (300).
[0246] The observation management server (300) precisely diagnoses information related to whether there is a leak and the risk of a leak through the data provided by the precision detection device (110), and first diagnoses whether there is a possibility of collapse of the pipe.
[0247] If there is no or little risk of collapse, the leakage risk grade of the point is calculated, and if it is diagnosed that there is a possibility of collapse, the corresponding signal, that is, the 'pipeline protection mode' signal, is sent back to the control device (120) of the complex leakage detection device (200).
[0248] The control device (120) executes the 'pipeline protection mode' when it receives a 'pipeline protection mode' signal.
[0249] As mentioned above, 'pipeline protection mode' stops the removal of foreign substances from the inner surface of the water pipe.
[0250] Then, if the data measured by the precision detection device during the stabilization threshold time is below the reference setting value, the control device (120) determines that there is no or little possibility of collapse (below the reference setting value) and controls the composite leak detection device (200) by moving it forward. If it is determined that there is a possibility of collapse above the reference setting value, the device moves backward through the operation of the moving device (150) to discharge it outside the water pipe, transmits this information to the pipe network management server (300), and the pipe network management server (300) immediately provides this signal to the user terminal (400).
[0251] At this time, the diagnosis of the possibility of immediate collapse may be performed by the control device (120), or the data collected from the precision detection device (110) during the stabilization critical time may be transmitted to the network management server (300) so that the network management server (300) can perform the diagnosis.
[0252] A more specific example of the control of the observation management server (300) and the control device (120) is as follows.
[0253] In the basic mode (driving, start), the fluid control unit (124) of the control device (120) controls the compressor (130) to stop operating while the suction pump (140) is in an operating state, and the valve control unit (121) controls the rear supply valve (11c) and the front supply valve (11d) to be closed and the rear exhaust valve (12b) and the front exhaust valve (12c) to be opened so that the front sealing tube (32) and the rear sealing tube (22) are in a contracted state so that they can move inside the water pipe (1).
[0254] In this state, the valve control unit (121) controls the opening of the auxiliary supply valve (14b), and the detection control unit (123) applies an operation signal to the forward detection device (100).
[0255] When the auxiliary supply valve (14b) is opened, scale or foreign matter on the inner surface of the water pipe (1) in front is removed.
[0256] Additionally, the activated forward detection device (100) collects sound or images from the front in real time and provides the collected data to the control device (120), and the control device (120) sends the collected data in real time to the data reception and storage unit (310) of the observation management server (300) through the communication unit (126).
[0257] The monitoring management server (300) analyzes this data in the leakage data analysis unit (320) to determine whether there is an abnormality.
[0258] Examples of determining whether an anomaly exists include comparing with a reference value entered through a user terminal or determining it based on the difference from the average value of the collected data.
[0259] For example, when image data is obtained from a forward detection device (100) or a precision detection device (110), it can be determined based on an area with a rapid change relative to a preset pixel brightness, or when voice data is obtained, it can be determined based on the intensity of a specific frequency outside the standard conduit acoustic frequency band.
[0260] Meanwhile, in driving mode, the control device (120) can provide a signal to the drive motor (63) to rotate at a low speed through the rotation control unit (122), thereby causing the rotation housing (50) to rotate at a low speed by the operation of the drive motor (63).
[0261] In this case, the forward detection device (100) rotates and can evenly scan and detect the entire surface in front of the pipe.
[0262] Additionally, the body supply valve (11b) may be intermittently opened through the valve control unit (121) during driving to push out floating debris from the front from the Coanda nozzle (80) or to clean the sensor window.
[0263] When the leak data analysis unit (320) of the network management server (300) analyzes the detection data provided by the forward detection device (100) and detects an abnormal point in the pipeline, the network management server (300) provides this signal to the complex leak detection device (200), and the leak detection device (200) that receives this signal stops the movement of the complex leak detection device, isolates the pipeline, and then allows the operation of the precision detection device to take place.
[0264] First, the movement control unit (125) controls the operation of the movement device (150) to stop, and for pipe isolation, the valve control unit (121) controls the rear exhaust valve (12b), the front exhaust valve (12c), and the auxiliary supply valve (14b) to be closed, and controls the rear supply valve (11c) and the front supply valve (11d) to be opened, while the fluid control unit (124) controls the operation of the compressor (130) to expand the rear sealing tube (22) and the front sealing tube (32) to form an isolated space inside the pipe.
[0265] In this state, the valve control unit (121) controls the opening of the body supply valve (11b) and the outer discharge control valve (40), and the rotation control unit (122) controls the operation of the drive motor (63) so that the rotating housing (50) rotates, and high-pressure gas is supplied to the space between the rotating housing (50) and the inner wall of the water pipe (1) through the Coanda nozzle (80), and the water inside the isolated space is discharged to the outside through the outer discharge control valve (40), gradually converting the isolated space into a dry environment.
[0266] Along with the progress of this process or after this process is finished, the detection control unit (123) controls the operation of the precision detection device (110) so that precision leak detection of the isolated space is performed.
[0267] More specifically, the detection control unit (123) activates the laser profiler (111), eddy current sensor (113), and encoder (112) to rotate together with the rotating housing (50) to 3D scan the thickness change of the pipe wall, crack coordinates, and power diagram.
[0268] The eddy current sensor (113) forms an electromagnetic field on the inner wall of the metal pipe to detect micro-cracks or thickness changes that occur in the pipe, and the laser profiler (111) irradiates a laser onto the inner surface of the pipe to measure changes in the roundness of the pipe and the depth of corrosion, and formulates the degree of deformation of the leaking area or the depth of the hole caused by corrosion to provide 3D scan data of the damage state at the point beyond simply determining whether there is a leak.
[0269] In addition, a high-pressure supply pipe (90b) or a thermal mass flow meter (114) connected to the high-pressure supply pipe (90b) is activated to measure the mass of air escaping from the space between the tubes and to calculate the actual amount of water leaking.
[0270] In this case, it is preferable for the valve control unit (121) to temporarily block the outer discharge control valve (40).
[0271] The activated encoder (112) is linked with the eddy current sensor (113) to generate coordinate data for the exact location of the crack occurrence point.
[0272] The detection control unit (123) matches the accumulated travel distance value of the encoder (112) with the rotation angle at which the peak signal of the eddy current sensor (113) occurs to generate precise coordinates such as distance and direction from the entrance, and provides them to the observation management server (300) through the aforementioned wired / wireless communication network (600).
[0273] In this way, the precision exploration data of the precision exploration device (110) under the control of the detection control unit (123) is transmitted to the pipe network management server (300) by the communication unit (126), and the pipe network management server (300) provides this data to the collapse risk identification unit (330) and the leak data analysis unit (320). The collapse risk identification unit (330) identifies potential collapse risks through comparison with a standard setting value as described above, and if there is a collapse risk, it first provides a 'pipeline protection mode' signal to the complex leak detection device (200).
[0274] In addition, the leakage data analysis unit (320) compares and analyzes the provided data with pre-set values regardless of whether there is a possibility of collapse.
[0275] For example, when detection data is provided from a forward detection device (100), whether there is an abnormal point in front of the pipeline in this detection data, and when detection data is provided from a precision detection device (110), whether there is a leak at the corresponding point in this detection data, is calculated by comparing with user-set values or obtained data.
[0276] The pipeline condition diagnosis unit (340) collects all data analyzed by the leakage data analysis unit (320) and data identified and processed by the collapse risk identification unit (330), calculates the leakage risk grade (maintenance, repair, partial replacement, full reinstallation, etc.) by comparing it with a user-specified standard value or average value, and provides it to the user terminal (400).
[0277] As a specific example, the leakage risk grade score can be calculated using the following formula, and the leakage risk grade can be determined by dividing the grades according to the calculated score as described above.
[0278] Grade Score = (Leakage Amount × A) + (Pipeline Deterioration × B) + (Area of Surrounding Sediment Inflow × C)
[0279] (A, B, C = weight values, weight values are adjusted according to site conditions)
[0280] The control device (120) of the composite leak detection device (200), which receives a ‘pipeline protection mode’ signal from the monitoring management server (300), executes the pipeline protection mode as described above, such as the movement control unit (125) controlling the cessation of operation of the movement device (150), the rotation control unit (122) controlling the cessation of operation of the drive motor (63), and the fluid control unit (124) controlling the cessation of operation of the compressor (130).
[0281] Next, the control device (120) initiates the operation of the precision detection device (110) during the stabilization time entered by the user setting, and the data detected by the operation of the precision detection device (110) is provided back to the pipe network management server (300), and the collapse risk identification unit (330) of the pipe network management server (300) compares and analyzes the data during the stabilization threshold time to immediately determine whether there is a risk of collapse.
[0282] If it is determined that there is an immediate risk of collapse, a danger signal (alarm) is provided to the user terminal, and a signal to stop exploration and reverse is transmitted to the control device (120).
[0283] The control device (120) that receives this signal controls the operation of the compressor (130) and the operation of the suction pump (140) through the fluid control unit (124), and controls the blocking of the supply valves (11b, 11c, 11d, 14b) and the opening of the exhaust valves (12b, 12c) through the valve control unit (121) to cause the rear sealing tube (22) and the front sealing tube (32) to contract, and controls the backward movement of the moving device (150) through the movement control unit (125) to move the composite leak detection device (200) backward from the detection position and discharge it from the water pipe.
[0284] The above control maximizes pipeline protection when using the leak detection device, thereby preventing pipeline damage caused by leak detection and enabling effective response in cases of collapse risk. Explanation of the symbols
[0286] 1 : Water pipe 2 : Inlet 3 : Shut-off valve 4 : Towing wire 5 : Bobbin 10 : Main body 10a: Body part 10b: Rear connection part 10c : Front connection part 11 : Gas inlet 11a : Supply passage 11b : Body supply valve 11c: Rear supply valve 11d: Front supply valve 12: Exhaust port 12a: Tube exhaust passage 12b : Rear exhaust valve 12c : Front exhaust valve 13: Rear connecting member 13a: Supply connecting part 13b : Exhaust space 13c : Exhaust connection 14: Head member 14a: Extended air supply passage 14b : Auxiliary supply valve 20 : Rear tube case 20a: Rear step 20b: Gear installation space 21 : Rear insertion through hole 22 : Rear sealing tube 23: Rear connecting passage 24: Rear outer exhaust pipe 30 : Front tube case 30a : Front step 30b : Front installation space 31 : Front insertion through hole 32 : Front seal tube 33 : Front connecting passage 34 : Front outer exhaust pipe 40 : Exhaust control valve 50 : Rotating housing 51 : Rotating tubular body 51a: Nozzle installation cutout 51b: Brush installation cutout 52: Side wall 52a: Through hole 60 : Rotary drive unit 61 : Internal gear 62 : Shouting Gear 63 : Drive Motor 70 : Brush missing 71 : Brush housing 71a : Lower housing 71b : Upper housing 71c : Spring insertion groove 71d : Guide projection 71e : Protrusion insertion groove 71f : Lower installation space 71g : Step 71h : Column 71k : Upper installation space 71m : Side wall 72 : Brush bristles 73 : Leaf spring 74 : Fluid guide projection 80 : Coanda nozzle 81: High-pressure supply port 82: High-pressure discharge port 83: High-pressure passage 83a: Guide jaw 83b : Round part 90 : Joint unit 90a: Double pipe 90b: High-pressure supply pipe 90c : Discharge pipe 91 : High-pressure gas supply unit 92 : Gas exhaust section 100 : Forward detection device 110: Precision detection device 111: Laser profiler 112: Encoder 113: Eddy current sensor 114: Thermal mass flow meter 115: Central camera 120 : Control device 121 : Valve control unit 122: Rotation control unit 123: Detection control unit 124: Fluid control unit 125: Movement control unit 126 : Communication unit 130 : Compressor 140 : Suction pump 150 : Moving device 200 : Complex leak detection device 300: Monitoring Management Server 310: Data Reception and Storage Unit 320: Leakage Data Analysis Department 330: Collapse Risk Identification Department 340: Pipeline Condition Diagnosis Unit 350: Device Control and Alarm Unit 400 : User terminal 500 : GIS server 600 : Wired and wireless communication network
Claims
Claim 1 In a leak detection device for managing a water supply network based on a block system, the device is composed of a main body (10a), a rear connecting part (10b) and a front connecting part (10c) formed to extend from both sides of the main body (10a), and at the end of the rear connecting part (10b), a gas inlet (11) through which high-pressure gas is introduced and an exhaust port (12) through which gas is discharged are formed spaced apart from each other, and inside the main body (10a), the rear connecting part (10b), and the front connecting part (10c), a supply air passage (11a) through which gas introduced through the gas inlet (11) moves is formed, and on the outer surface of the main body (10a), the rear connecting part (10b), and the front connecting part (10c), a main air supply valve (11b) and a rear air supply valve (11c) are provided to control the opening and closing and the amount of opening of the high-pressure gas moving along the supply air passage (11a). A main body (10) having a front air supply valve (11d) installed therein, a tube exhaust passage (12a) connected to the exhaust port (12) formed inside the body part (10a), rear connecting part (10b), and front connecting part (10c), and a rear exhaust valve (12b) and a front exhaust valve (12c) installed therein on the outer surface of the rear connecting part (10b) and front connecting part (10c) to control the opening and closing of the gas to be discharged into the tube exhaust passage (12a) and to control the amount of opening and closing;A rear insertion through hole (21) is formed in the center, and the rear connecting part (10b) is inserted and connected inwardly. The outer diameter is formed larger than that of the body part (10a), and a rear step (20a) is formed to protrude forward at the point where it meets the body part (10a). As the rear step (20a) is formed to protrude forward, a gear installation space (20b) is formed in the front central side surrounded by the rear step (20a). A rear sealing tube (22) that expands and contracts according to gas supply and discharge is installed along the outer surface. Inside, a rear connecting passage (23) is formed to connect the rear sealing tube (22) with the rear supply valve (11c) and the rear exhaust valve (12b), respectively. A rear outer exhaust pipe (24) that communicates from the rear step (20a) to the rear end is installed through the rear sealing tube (22). A rear tube case (20) and a front fitting through hole (31) are formed in the center, so that the front connecting part (10c) is fitted inwardly and connected, and the outer diameter is made larger than that of the body part (10a), so that a front step (30a) is formed protruding toward the rear side at the point where it meets the body part (10a), and as the front step (30a) is formed protruding toward the rear side, a front installation space (30b) is formed in the rear central side surrounded by the front step (30a), and a front sealing tube (32) that expands and contracts according to gas supply and discharge is installed along the outer surface, and a front connecting passage (33) is formed inside that connects the front sealing tube (32), the front supply valve (11d), and the front exhaust valve (12c) respectively, and a front outer exhaust pipe (34) that communicates from the front step (30a) to the front end is the A front tube case (30) installed through the front sealing tube (32);An outer discharge control valve (40) that is respectively installed in the rear outer exhaust pipe (24) of the rear tube case (20) and the front outer exhaust pipe (34) of the front tube case (30), and configured to control the amount of fluid discharged in the outer direction while blocking the fluid flow in the inner direction relative to the body part (10); a cylindrical rotating tube body (51) that surrounds the body part (10a) of the main body (10), wherein the inner surface is spaced apart from the outer surface of the body part (10a) to form a buffer space (53) in which high-pressure gas discharged from the body supply valve (11b) temporarily remains between the outer surface of the body part (10a) and the nozzle installation cut-out (51a) and the brush installation cut-out (51b) are formed adjacently along the length direction, and the brush installation cut-out (51b) is positioned to correspond to the front relative to the rotation direction; and connected to both front and rear ends of the rotating tube body (51), wherein the outer surface is the A rotating housing (50) comprising a side wall portion (52) that is rotatably connected to the main body (10) and has a through hole (52a) formed in the center through which the rear connecting portion (10b) and the front connecting portion (10c) respectively pass; a ring-shaped internal gear (61) installed around the rear side wall portion (52) of the rotating housing (50) and having gear teeth on its inner surface, a cylindrical external gear (62) installed in the gear installation space (20b) of the rear tube case (20) and having gear teeth on its outer surface that mesh with the internal gear (61) to rotate the rotating housing (50) connected to the internal gear (61), and connected to the external gear (62) through a gear shaft A rotary drive device (60) that rotates the rotary housing (50) based on the center of the main body (10) and is composed of a drive motor (63) that rotates the external gear (62);A brush member (70) comprising a brush housing (71) installed by being fitted into the brush installation cut portion (51b) and brush bristles (72) connected to one side of the brush housing (71) to brush foreign substances on the inner wall surface of the water pipe; a high-pressure supply port (81) formed at the bottom, which is positioned with its upper surface facing the inner surface of the water pipe (1) while being fitted into the nozzle installation cut portion (51a), and which is connected to the buffer space (53) so that high-pressure gas flows into the interior through the buffer space (53), and a high-pressure discharge port (82) formed on the upper surface to discharge the high-pressure gas introduced through the high-pressure supply port (81), and a high-pressure passage (83) formed inside that is inclined toward the inner surface of the water pipe (1) in the opposite direction to the rotation direction of the rotation housing (50) so that the high-pressure gas introduced from the high-pressure supply port (81) can move to the high-pressure discharge port (82). A Coanda nozzle (80) is formed such that, at the end of the high-pressure passage (83) connected to the high-pressure discharge port (82), a guide projection (83a) is formed to reduce the internal flow path cross-sectional area, and the corner of the wall opposite the guide projection (83a) is formed as a rounded portion (83b), thereby causing suction pressure to act in the space between the guide projection (83a) and the inner surface of the water pipe (1), so that foreign matter on the inner surface of the water pipe (1) is guided from the inner surface of the water pipe (1) to the surface of the rotating housing (50) in the space where suction pressure acts, and the foreign matter that is guided to the surface of the rotating housing (50) and moves along the surface of the rotating housing (50) together with the high-pressure gas is discharged through the outer discharge control valve (40); a high-pressure gas supply unit (91) connected to the rear connection part (10b) of the main body (10) and supplying high-pressure gas to the gas inlet (11), and the A joint unit (90) having a gas discharge section (92) through which gas discharged through an exhaust port (12) passes; and a front detection device (100) installed on the front of the front tube case (30) to detect a pipe abnormality point inside the water pipe (1) on the front side of the front tube case (30);A leak detection device for block system-based water supply network management, comprising: a precision detection device (110) for detecting whether there is a leak in the water pipe (1) in the space between the rear sealing tube (22) and the front sealing tube (32). Claim 2 In claim 1, the brush housing (71) is bolted to a rotating tube body (51) around the brush installation cut-out (51b) while being fitted into the brush installation cut-out (51b), and a downward step (71g) is formed between the two side walls (71m) to form a lower installation space (71f) between the two steps (71g), and a spring insertion groove (71c) is formed in the outer direction at the bottom of the two steps (71g), and a guide projection (71d) is formed protruding upwardly at the top of the two side walls (71m) for the lower housing (71a); and columns (71h) corresponding to the side walls are formed on both sides, and a projection insertion groove (71e) is formed in the columns (71h) to insert the guide projection (71d) so as to be coupled to the lower housing (71a) so as to be movable upward, and between the two columns (71h) A leak detection device for managing a water supply network based on a block system, comprising: an upper housing (71b) having an upper installation space (71k) formed therein and the brush bristles (72) installed on the upper surface; and having a plate-like shape installed inside the lower installation space (71f) and the upper installation space (71k) with both ends fitted into the spring insertion groove (71c), and further provided with a plate spring (73) having elasticity that pushes the lower part of the upper installation space (71k) upward, so that the brush bristles (72) have elasticity directed toward the inner surface of the water pipe (1). Claim 3 A leak detection device for water supply network management based on a block system, characterized in that, in the first aspect, a fluid guide projection (74) is formed on the upper surface of the brush housing (71) such that a portion corresponding to the front relative to the rotational direction of the rotating tube body (51) protrudes upward toward the surface of the water pipe (1), thereby inducing the high-pressure gas that moves through the Coanda nozzle (80) toward the surface of the rotating tube body (51) to flow along the inner circumference of the water pipe (1), thereby suppressing collision with the high-pressure gas discharged from the high-pressure discharge port (82) of the Coanda nozzle (80). Claim 4 A leak detection device for managing a water supply network based on a block system, characterized in that, in the first paragraph, a head member (14) is connected to the front of the front connecting part (10c) of the main body (10), an extended air supply passage (14a) is formed that is connected from the front end of the head member (14) to the air supply passage (11a) inside the front connecting part (10c), and an auxiliary air supply valve (14b) is installed at the end of the extended air supply passage (14a) to control the opening and closing of high-pressure gas and control the amount of opening and closing, so as to be configured to supply high-pressure gas toward the inside of the water pipe (1) in front of the main body (10). Claim 5 In claim 1, a control device (120) is further provided to control the operation of each device by being electrically connected to the body supply valve (11b), rear supply valve (11c), front supply valve (11d), rear exhaust valve (12b), front exhaust valve (12c) of the main body (10), the driving motor (63) of the rotary drive device (60), the outer discharge control valve (40), the front detection device (100), and the precision detection device (110); wherein the control device (120) provides an opening signal to the rear supply valve (11c) and the front supply valve (11d) only after obtaining a front leak detection signal through the front detection device (100), thereby expanding the rear sealing tube (22) and the front sealing tube (32).
Citation Information
Patent Citations
System for out-put and security of leakage test datafor leakage test apparatus of waterworks and sewer
KR1020030095044A