Urban water supply pipe network leakage detector and detection method

Abstract

The invention discloses an urban water supply pipe network leakage detector and a detection method, and relates to the field of municipal engineering. A leakage detector for an urban water supply pipe network comprises a circular sealing cover composed of two semicircular sealing covers, the circular sealing cover is arranged at a connector between every two water supply pipes in a sleeving mode, and the two semicircular sealing covers are detachably connected through fixing bolts; the semi-circular sealing plate is arranged in the semi-circular sealing cover and is used for blocking a joint between the two water supply pipelines when water leaks; by means of the emergency plugging function, water can be timely prevented from continuously leaking at the initial stage of water leakage at the pipeline connecting position, compared with a traditional mode that only detection is conducted without pretreatment, waste of water resources is greatly reduced, and the urban water saving concept and the efficient utilization requirement of the water resources are met.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of municipal engineering, and particularly relates to a city water supply pipe network leakage detector and a detection method. BACKGROUND

[0002] As an important infrastructure, the city water supply pipe network is prone to crack and water leakage due to pipe aging, soil corrosion, water flow scouring and other factors. Especially at the pipe connection, due to the complexity of the structure and stress concentration, it becomes a high leakage area. The traditional detection method mainly relies on manual inspection (such as listening to a leakage rod, ground listening to a leakage instrument) and partition measurement (DMA) technology, but there are problems such as low detection efficiency, poor positioning accuracy, and difficulty in long-term continuous detection. In recent years, with the development of sensor technology, intelligent devices such as pressure sensors and flow sensors have been applied to pipe network monitoring, which can indirectly judge the leakage through pressure fluctuation or flow anomaly. However, this kind of technology can only realize leakage alarm and lacks the ability of immediate pretreatment of leakage points.

[0003] The core defect of the existing leakage detection system is that detection and processing are separated. When the system detects water leakage, the upstream valve needs to be closed manually or remotely. However, the residual water in the pipe will continue to leak until the pressure in the pipe drops to zero. According to statistics, the average time from discovering the leakage to closing the valve is about 15-30 minutes, which can cause waste of hundreds of liters to several tons of water resources during this period. In addition, due to the slow response of traditional technology, it is easy to cause secondary disasters such as road collapse and building foundation damage. Therefore, the present application is proposed. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide a city water supply pipe network leakage detector and a detection method that can overcome the above problems or at least partially solve the above problems.

[0005] To solve the above technical problems, the basic idea of the technical solution adopted by the present application is as follows: a city water supply pipe network leakage detector, comprising: a circular sealing cover composed of two semicircular sealing covers, sleeved at the interface between every two water supply pipes, and the two semicircular sealing covers are detachably connected through fixing bolts; a semicircular sealing plate is arranged in the semicircular sealing cover for plugging the interface between the two water supply pipes when water leaks; a monitor for monitoring whether the interface between the two water supply pipes leaks is installed on one of the semicircular sealing covers; and a driving assembly for driving the semicircular sealing plate to move to the interface when the interface between the two water supply pipes leaks is installed on the semicircular sealing cover.

[0006] Further, the driving assembly comprises a shell, a communication pipe, a moving plate, an extension spring and a connecting rod, the shell is fixedly connected on the semicircular sealing cover, the moving plate is slidingly connected in the shell, the connecting rod is fixedly connected on one side of the moving plate close to the semicircular sealing cover, one end of the connecting rod away from the moving plate extends into the semicircular sealing cover and is fixedly connected with the semicircular sealing cover, the extension spring is arranged on one side of the moving plate away from the connecting rod and is fixedly connected with the shell and the moving plate at two ends, a water inlet is formed on the shell at a position above the moving plate, and the two ends of the communication pipe are communicated with the water outlet of the semicircular sealing cover and the water inlet of the shell.

[0007] Further, the monitor is a pressure sensor, the pressure sensor is fixedly installed on the shell and extends into the shell at a detection end, and the detection end of the pressure sensor is located on one side of the moving plate close to the extension spring.

[0008] In order to facilitate the detection instrument to be more adapted to the water supply pipeline, further, the semicircular sealing cover and the semicircular sealing plate are designed in a concave shape.

[0009] In order to facilitate the detection instrument to be more adapted to the water supply pipeline, further, the semicircular sealing cover and the semicircular sealing plate are designed in a concave shape.

[0010] In order to facilitate the detection instrument to be more adapted to the water supply pipeline, further, the semicircular sealing cover and the semicircular sealing plate are designed in a concave shape.

[0011] In order to facilitate the detection instrument to be more adapted to the water supply pipeline, further, the semicircular sealing cover and the semicircular sealing plate are designed in a concave shape.

[0012] In order to facilitate the detection instrument to be more adapted to the water supply pipeline, further, the semicircular sealing cover and the semicircular sealing plate are designed in a concave shape.

[0013] The application also provides a detection method for leakage of urban water supply pipe network, mainly comprising the following steps: Step one, installation and deployment: install the circular sealing cover composed of two semicircular sealing covers at the interface of the two water supply pipelines through fixing bolts to complete the sealing protection construction; Step two, long-term continuous detection: use the pressure sensor on the shell to continuously detect the pressure change inside the circular sealing cover and the shell to determine whether the interface leaks; Step three, leakage response: if the water supply pipeline interface leaks, the leaked water will enter the circular sealing cover, flow into the shell through the connecting pipe, and the water pressure will drive the moving plate inside the shell to move against the elastic force of the extension spring; Step four, emergency plugging: the moving plate drives the semicircular sealing plate through the connecting rod, moves to the water supply pipeline interface and tightly adheres to it, and performs emergency plugging on the leakage point; Step five, subsequent disposal: based on the detection and plugging feedback, the operation and maintenance personnel carry out pipeline repair, reinstall the circular sealing cover and related components after repair, restore the normal operation of the pipeline, and complete the leakage treatment closed loop.

[0014] After adopting the above technical scheme, compared with the prior art, the present application has the following beneficial effects: through the emergency plugging function, the present application can timely prevent continuous leakage at the initial stage of leakage at the pipeline connection, compared with the traditional detection without pretreatment, the present application greatly reduces the waste of water resources, and meets the urban water saving concept and the demand for efficient use of water resources.

[0015] The leakage detection and emergency plugging are integrated, manual operation is not required for plugging, the leakage response time is shortened, and from the occurrence of leakage to the start of plugging, the device is automatically triggered, sufficient preparation time is reserved for subsequent professional repair, and the pipe network operation and maintenance efficiency is improved.

[0016] By monitoring and protecting the weak link at the pipeline connection in real time, the risks of sudden drop of pipe network pressure, water immersion damage to surrounding facilities and the like caused by leakage can be reduced, the overall operation stability of the urban water supply pipe network is ensured, and the adverse effects of leakage on resident water use, surrounding environment and municipal facilities are reduced.

[0017] The specific embodiments of the present application will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] In the drawings: Figure 1 is a structural diagram of the present application Figure 1 ; Figure 2 is a structural diagram of the present application Figure 2 ; Figure 3 is a sectional view of the present application Figure 1 ; Figure 4 is a sectional view of the present application Figure 2 ; Figure 5 Structure diagram of part A in the present application Figure 3 Structure diagram of part A in the present application Figure 6 Structure diagram of part B in the present application Figure 4 Structure diagram of part B in the present application Figure 7 Structure diagram of part B in the present application

[0019] In the figure: 1, water supply pipeline; 2, semicircular sealing cover; 201, fixing bolt; 202, semicircular plate; 203, first semicircular sealing gasket; 3, shell; 301, pressure sensor; 302, communication pipe; 303, moving plate; 304, extension spring; 305, connecting rod; 306, semicircular sealing plate; 307, second semicircular sealing gasket; 4, semicircular air supply air bag; 401, air supply pipe. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0021] Embodiment 1 With reference to Figures 1-7 A city water supply pipeline network leakage detector, comprising: a circular sealing cover composed of two semicircular sealing covers 2, sleeved at the interface between every two water supply pipelines 1, and detachably connected through fixing bolts 201 between the two semicircular sealing covers 2; a semicircular sealing plate 306, arranged in the semicircular sealing cover 2, used for plugging the interface between the two water supply pipelines 1 when leaking; a monitor for monitoring whether the interface between the two water supply pipelines 1 leaks, installed on one of the semicircular sealing covers 2; a driving assembly for driving the semicircular sealing plate 306 to move to the interface when the interface between the two water supply pipelines 1 leaks, installed on the semicircular sealing cover 2.

[0022] The driving assembly comprises a shell 3, a communication pipe 302, a moving plate 303, an extension spring 304 and a connecting rod 305, the shell 3 is fixedly connected to the semicircular sealing cover 2, the moving plate 303 is slidingly connected in the shell 3, the connecting rod 305 is symmetrically fixedly connected to one side of the moving plate 303 close to the semicircular sealing cover 2, one end of the connecting rod 305 away from the moving plate 303 extends into the semicircular sealing cover 2 and is fixedly connected with a semicircular sealing plate 306, the extension spring 304 is arranged on the side of the moving plate 303 away from the connecting rod 305 and is fixedly connected with the shell 3 and the moving plate 303 at both ends, a water inlet is formed on the shell 3 at a position above the moving plate 303, and both ends of the communication pipe 302 are communicated with a water outlet of the semicircular sealing cover 2 and the water inlet of the shell 3.

[0023] The monitor is a pressure sensor 301, which is fixedly installed on the shell 3 and has a detection end extending into the shell 3, and the detection end of the pressure sensor 301 is located on the side of the moving plate 303 close to the extension spring 304.

[0024] When it is necessary to install the leakage detector to perform real-time leakage detection on the connection part of the water supply pipeline 1, the detector can be installed after the water supply pipeline 1 is installed, two semicircular sealing covers 2 are placed on both sides of the connection part of the two water supply pipelines 1, and the two semicircular sealing covers 2 are connected by the fixing bolts 201 to form a circular sealing cover, thereby sealing and protecting the connection part of the pipeline and providing a basis for leakage detection and plugging.

[0025] When the connection part of the water supply pipeline 1 leaks due to aging, corrosion and the like after a long time of use, the leaked water will seep into the circular sealing cover, and the accumulated water in the circular sealing cover will gradually increase with the continuous leakage, and then the water will flow into the shell 3 through the communication pipe 302.

[0026] After the water enters the shell 3, the water pressure acts on the moving plate 303 as the water volume increases, the moving plate 303 slides towards the water supply pipeline 1 under the water pressure and against the elastic force of the extension spring 304, the moving plate 303 drives the semicircular sealing plate 306 to move towards the connection part of the water supply pipeline 1 synchronously through the symmetrically fixed connecting rod 305, until the semicircular sealing plate 306 is tightly attached to the connection part of the two water supply pipelines 1, thereby plugging the leakage part in an emergency by using the structure thereof, stopping the continuous leakage of water, gaining time for subsequent maintenance work and avoiding continuous waste of water resources.

[0027] At the same time, the pressure sensor 301 installed on the shell 3 detects the extension of the moving plate 303 into the shell 3 to the side close to the extension spring 304. When the shell 3 is filled with water due to water leakage, the water pressure change will be captured by the pressure sensor 301, and then converted into an electrical signal feedback, realizing real-time detection of whether the pipeline connection is leaking. The operation and maintenance personnel can timely grasp the situation and send maintenance personnel to the scene for plugging work.

[0028] Through the emergency plugging function, the water leakage at the pipeline connection can be timely stopped at the initial stage, which greatly reduces the waste of water resources compared with the traditional detection without pretreatment, and meets the urban water saving concept and efficient use of water resources.

[0029] The water leakage detection and emergency plugging are integrated, without manual operation for plugging, which shortens the response time of water leakage, relies on the automatic triggering of the device from the occurrence of water leakage to the start of plugging, and reserves sufficient preparation time for subsequent professional maintenance, thereby improving the efficiency of pipeline network operation and maintenance.

[0030] Through real-time detection and protection of the weak link of the pipeline connection, the risk of sudden drop of pipeline network pressure and water immersion damage to surrounding facilities caused by water leakage can be reduced, the overall operation stability of urban water supply pipeline network is ensured, and the adverse effects of water leakage on residents' water use, surrounding environment and municipal facilities are reduced.

[0031] Embodiment 2: Referring to Figures 1-7 A city water supply pipeline leakage detector, which is basically the same as embodiment 1, and further, the semicircular sealing cover 2 and the semicircular sealing plate 306 are designed in a concave shape.

[0032] For the semicircular sealing cover 2, it can better fit the outer wall of the water supply pipeline 1. When two semicircular sealing covers 2 are combined into a circular sealing cover, it can form a tighter package with the pipeline, improve the sealing effect, reduce the possibility of water leakage from the gap between the sealing cover and the pipeline, and ensure that most of the leaked water stays in the sealing cover, providing sufficient water for the subsequent driving of the plugging assembly through the connecting pipe 302 into the shell 3.

[0033] For the semicircular sealing plate 306, the concave design makes it more compatible with the shape of the connection between the water supply pipeline 1. When the plugging is moved, it can increase the contact area with the pipeline connection, improve the tightness and reliability of the plugging, enhance the emergency plugging effect, and more effectively prevent water leakage. At the same time, the concave design can also make the two more compatible in structure, reduce the positional deviation during installation and plugging, and ensure the stability of the overall operation of the device.

[0034] Embodiment 3: Referring to Figures 1-7The utility model discloses a kind of urban water supply pipe network leakage detection instruments, substantially same with embodiment 2, further, semicircular sealing cover 2 Two sides symmetrical fixedly connected with semicircular plate 202, semicircular plate 202 With the first semicircular sealing pad 203 of semicircular sealing cover 2 With water supply pipeline 1 Adjacent side fixedly connected, semicircular sealing plate 306 With the second semicircular sealing pad 307 of semicircular sealing cover 2 With water supply pipeline 1 Adjacent side fixedly connected, can greatly improve sealing reliability, semicircular plate 202 As the transition connection structure of semicircular sealing cover 2 With water supply pipeline 1, the first semicircular sealing pad 203 of its side can be closely attached to pipe outer wall, fill the tiny gap between sealing cover and pipeline, prevent the water from leaking from the edge of sealing cover, ensure that all leakage is confined in sealing cover inside, provide stable water pressure power for subsequent driving plugging component, and the second semicircular sealing pad 307 on semicircular sealing plate 306, when plugging, can be closely attached to irregular surface of pipeline connection place by itself elastic deformation, further enhance the sealing property of emergency plugging, reduce residual leakage after plugging.

[0035] Semicircular plate 202 Symmetrical design matches with pipeline appearance, can make sealing cover more stably wrap pipeline, avoid sealing failure due to slight shaking of pipeline, the first semicircular sealing pad 203,second semicircular sealing pad 307 Can adopt elastic material (such as rubber), can adapt to the slight difference of different pipe diameters and the unevenness of pipeline surface, while play buffering effect in plugging process, avoid the scratch or damage caused by hard contact of metal material to pipeline surface, protect pipeline body, the first semicircular sealing pad 203 Can increase the friction between sealing cover and pipeline, cooperate fixed bolt 201 Further prevent sealing cover from displacement under water pressure or external force, and the second semicircular sealing pad 307 Then through elastic extrusion when plugging, make semicircular sealing plate 306 With the tight static friction of pipeline connection place, ensure that plugging state is stable, not easy to loosen due to water flow impact.

[0036] The first semicircular sealing gasket 203 and the second semicircular sealing gasket 307 are both semicircular air bags, and the semicircular sealing cover 2 is symmetrically fixed and connected with semicircular air supply air bags 4 on the two sides of the inside of the semicircular sealing cover 2, the air supply air bag 4 is connected with the air inlet of the adjacent first semicircular sealing gasket 203, and the semicircular air supply air bag 4 and the second semicircular sealing gasket 307 are connected with each other through the air supply pipe 401. When the water supply pipeline 1 interface leaks, the water in the circular sealing cover pushes the plugging assembly to move, the water pressure of the leakage indirectly extrudes the semicircular air supply air bag 4, the gas in the semicircular air supply air bag 4 is filled into the first semicircular sealing gasket 203 through the air inlet, and the second semicircular sealing gasket 307 is supplied with air through the air supply pipe 401. After the inflation of the two air bags, the internal pressure is expanded, and the small gap between the pipeline outer wall is automatically filled (such as the gap caused by the uneven surface of the pipeline and the installation deviation), compared with the traditional solid sealing gasket, the inflation pressure of the air bag can be dynamically adjusted according to the leakage degree, the more serious the leakage is, the greater the pressure of the air supply air bag is, the more sufficient the inflation of the air bag sealing gasket is, and the stronger the sealing effect is, so that the passive fitting is realized to the active pressure sealing.

[0037] The first semicircular sealing gasket 203 and the second semicircular sealing gasket 307 are connected through the semicircular air supply air bag 4 and the air supply pipe 401. In the early stage of leakage, the first semicircular sealing gasket 203 is inflated and expanded first, the gap between the sealing cover and the pipeline is tightened, the overflow of the leaked water from the edge of the sealing cover is prevented, and more leaked water enters the housing 3 to drive the plugging assembly. In the plugging stage, the second semicircular sealing gasket 307 is inflated synchronously, and an elastic buffer layer is formed between the semicircular sealing plate 306 and the pipeline interface, which not only enhances the plugging tightness, but also adapts to the irregular shape of the interface (such as interface misalignment and slight deformation) through the deformation of the air bag, solves the problem of rigid fitting of the solid sealing plate, and forms flexible contact when the inflated air bag contacts with the pipeline. The first semicircular sealing gasket 203 can buffer the friction force generated by the installation of the sealing cover or the vibration of the pipeline, so as to avoid scratching the anti-corrosion layer of the outer wall of the pipeline. When the second semicircular sealing gasket 307 is plugging, the impact force generated by the water flow impact is absorbed by the elasticity of the air bag, so as to prevent the hard extrusion of the sealing plate on the pipeline interface from causing the interface cracking (especially for the aging and brittle pipeline).

[0038] The semicircular air bag and the semicircular air supply air bag 4 are both polyurethane air bags, The molecular structure of the polyurethane is compact, and the gas permeability is much lower than that of rubber, which can effectively reduce the slow leakage of gas in the air bag and ensure that it can maintain an inflated state for a long time after inflation. At the same time, the polyurethane material is resistant to water and humidity, and when it comes into contact with tap water or a humid environment in the water supply network, it will not swell or degrade, avoiding the decline in sealing performance caused by material water absorption. Polyurethane has good resistance to ultraviolet light, ozone and general chemical agents (such as trace disinfectants and minerals in water), and is not prone to hardening, cracking and other aging phenomena when buried or exposed to outdoor environments for a long time. This property enables it to adapt to the diverse environments of the water supply network (such as underground soil corrosion and ground temperature changes), ensuring stable performance of the air bag during long-term use without the need for frequent replacement. The polyurethane material has good wear resistance, and in the water supply network environment, the air bag needs to be in constant friction with the outer wall of the pipeline (such as slight pipeline vibration and installation and removal), and after inflation, it will bear continuous internal pressure. The polyurethane material can effectively resist these mechanical stresses, reducing surface damage or tearing caused by friction and avoiding air bag failure due to air leakage. Compared to other materials, the polyurethane air bag has slower elastic attenuation during long-term repeated inflation-deflation cycles, reducing maintenance frequency.

[0039] Example 4: Referring to Figures 1-7 The half-circular sealing cover 2, the half-circular plate 202, the half-circular sealing plate 306, and the shell 3 are all made of polyether ether ketone plastic plates.

[0040] In the water supply network, the water flow may contain trace disinfectants, minerals or corrosive components permeated from the soil, and the sealing cover is in long-term contact with water in the shell 3, which is prone to chemical corrosion. Polyether ether ketone plastic has excellent resistance to acids, bases, organic solvents and hot water, and will not degrade like metals (such as carbon steel rusting and copper being corroded by chloride ions) or ordinary plastics (such as PVC aging when exposed to water for a long time). Even in a humid environment for a long time, it can maintain structural integrity and avoid sealing failure or component damage due to corrosion, greatly extending the overall service life.

[0041] The mechanical strength of polyether ether ketone plastic is close to that of metal, and it has excellent rigidity, which can meet the functional requirements of each component: the half-circular sealing cover 2 and the half-circular plate 202 need to withstand the water pressure of the internal water and the external soil pressure. The impact resistance of polyether ether ketone can prevent deformation or cracking, ensuring the integrity of the sealed space. The half-circular sealing plate 306 needs to resist the impact force of the water flow when sealing, and the high strength of polyether ether ketone can ensure that it does not bend or break under pressure, maintaining the tightness of the seal.

[0042] The density of polyether ether ketone is much lower than that of metal, and the parts made of polyether ether ketone are lighter in weight, which can greatly reduce the installation difficulty, reduce the additional load on the pipeline interface, especially for the fragile interface of the old pipeline network, avoid the stress concentration of the interface caused by the excessive weight of the parts, and reduce the risk of secondary damage of the pipeline. In addition, the lightweight design also facilitates the deployment and maintenance of the device in narrow space.

[0043] Embodiment 5: Referring to Figures 1-7 A method for detecting leakage of urban water supply pipeline network, comprising the following steps: Step one, installation and deployment: Two concave designed semicircular sealing covers 2 are aligned and buckled at the interface of two water supply pipelines 1, and are fastened by the pre-set fixed bolts 201 on the edge to form a complete circular sealing cover. When installing, it is necessary to ensure that the semicircular plates 202 on both sides of the semicircular sealing cover 2 are attached to the outer wall of the pipeline, and the first semicircular sealing pad 203 (polyurethane air bag) on the inner side is initially attached to the surface of the pipeline to complete the physical isolation and sealing protection of the interface area; After installation, check the connection sealing performance of the driving assembly (housing 3, communication pipe 302, etc.) and the sealing cover to ensure that the detection end of the pressure sensor 301 correctly extends to the side of the moving plate 303 in the housing 3 close to the extension spring 304, and to ensure the accuracy of subsequent pressure monitoring; Step two, long-term continuous detection: The pressure sensor 301 on the housing 3 is used to continuously collect pressure data in the circular sealing cover and the housing 3 for 24 hours. Under normal conditions, the inside of the sealing cover is at normal pressure (or balanced with the outside air pressure), and the pressure value is stable within the reference range; When there is a trace leakage at the pipeline interface, the leaked water gradually accumulates in the sealing cover, is conducted to the housing 3 through the communication pipe 302, and causes the pressure in the housing 3 to rise. The pressure sensor 301 compares the real-time pressure value with the reference value, and when the deviation exceeds the pre-set threshold value (such as a pressure rise of more than 0.1 MPa), it is automatically determined as a leakage event and triggers the response mechanism (which can be linked to a remote alarm system to send a leakage warning to the operation and maintenance platform); Step three, leakage response: After the leakage occurs, the accumulated water in the sealing cover continuously flows into the housing 3 through the communication pipe 302, and the rising water level in the housing 3 gradually increases the water pressure. When the water pressure exceeds the initial elastic force of the extension spring 304, the moving plate 303 is pushed to slide along the axis of the housing 3 towards the pipeline interface; During the sliding of the moving plate 303, the semi-circular air supply air bag 4 inside the sealing cover is also extruded by water, and the gas inside is simultaneously filled into the first semi-circular sealing gasket 203 and the second semi-circular sealing gasket 307 (polyurethane air bag) through the gas supply pipe 401, so that the air bag is inflated and tightly attached to the outer wall of the pipeline, further enhancing the gap sealing performance of the sealing cover and the pipeline and the sealing plate and the pipeline; Step four, emergency plugging: The moving plate 303 drives the semi-circular sealing plate 306 to move synchronously through the symmetrical connecting rod 305, and the concave design of the sealing plate is precisely matched with the profile of the pipeline interface, and finally tightly attached to the interface. At this time, the second semi-circular sealing gasket 307 (inflated air bag) fills the small gap between the sealing plate and the pipeline, forming a double plugging structure of hard sealing + soft filling; As the leakage continues, the water pressure in the shell 3 remains stable, the moving plate 303 continuously stretches the extension spring 304, ensures the plugging pressure of the semi-circular sealing plate 306 to the interface, effectively prevents the continuous leakage of water, and controls the leakage amount in the initial stage (compared with the traditional method, the water leakage amount can be reduced by more than 80%); Step five, subsequent disposal: After receiving the leakage warning, the maintenance personnel carry maintenance tools to the scene, close the upstream valve of the pipeline section, remove the sealing cover, and repair the interface (such as replacing the sealing gasket, welding the crack, etc.); After the repair is completed, the circular sealing cover and related components are reinstalled, the accumulated water in the shell 3 is released, the moving plate 303 is reset under the action of the extension spring 304, the air bag also returns to the initial state, and the pressure sensor 301 reenters the monitoring mode, completing the whole process closed loop from leakage detection to repair.

[0044] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0045] The above only describes the preferred embodiments of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with preferred embodiments, it is not intended to limit the present application.

Claims

1. A leakage detector for urban water supply network, characterized in that, The utility model provides a kind of water supply pipe joint sealing device, including: Circular sealing cover consisting of two semicircular sealing covers (2), is sleeved in the interface between every two water supply pipes (1), and two the semicircular sealing cover (2) is detachably connected by fixed bolt (201); Semicircular sealing plate (306) is arranged in the semicircular sealing cover (2), and when water leaks, the interface between two water supply pipes (1) is blocked; Monitor for monitoring whether the interface between two water supply pipes (1) leaks, is installed on one of the semicircular sealing cover (2); Driving assembly for driving semicircular sealing plate (306) to move to the interface when the interface between two water supply pipes (1) leaks, is installed on the semicircular sealing cover (2).

2. The apparatus according to claim 1, wherein The driving assembly includes housing (3), communication pipe (302), moving plate (303), telescopic spring (304) and connecting rod (305), the housing (3) is fixedly connected on semicircular sealing cover (2), the moving plate (303) is slidably connected in housing (3), the connecting rod (305) is fixedly connected on one side of moving plate (303) close to semicircular sealing cover (2), one end of the connecting rod (305) away from moving plate (303) extends into semicircular sealing cover (2), and is fixedly connected with the semicircular sealing plate (306), the telescopic spring (304) is arranged on one side of moving plate (303) away from connecting rod (305), and both ends are fixedly connected with housing (3) and moving plate (303), respectively, water inlet is formed on the housing (3) at the position on the upper side of moving plate (303), and both ends of communication pipe (302) are communicated with the water outlet of semicircular sealing cover (2) and the water inlet of housing (3), respectively.

3. The apparatus according to claim 2, wherein The monitor is a pressure sensor (301), the pressure sensor (301) is fixedly installed on the housing (3), and the detection end extends into the housing (3), and the detection end of the pressure sensor (301) is located on one side of moving plate (303) close to telescopic spring (304).

4. The apparatus according to claim 1, wherein The semicircular sealing cover (2) and semicircular sealing plate (306) are designed as concave type.

5. The apparatus according to claim 2, wherein The two sides of the semicircular sealing cover (2) are fixedly connected with semicircular plates (202), the side adjacent to the water supply pipe (1) of the semicircular plate (202) is fixedly connected with the first semicircular sealing pad (203), and the side adjacent to the water supply pipe (1) of the semicircular sealing plate (306) is fixedly connected with the second semicircular sealing pad (307).

6. The apparatus according to claim 5, wherein The first semicircular sealing pad (203) and the second semicircular sealing pad (307) are both semicircular air bags, the inside of the semicircular sealing cover (2) is fixedly connected with semicircular gas supply air bags (4) on both sides, the gas inlet of the semicircular gas supply air bag (4) and the gas inlet of the adjacent first semicircular sealing pad (203) are communicated with each other, and the semicircular gas supply air bag (4) and the second semicircular sealing pad (307) are communicated with each other through gas supply pipe (401).

7. The apparatus according to claim 6, wherein The semi-circular air bag and the semi-circular air supply bag (4) are both polyurethane air bags.

8. The apparatus according to claim 5, wherein The semi-circular sealing cover (2), the semi-circular plate (202), the semi-circular sealing plate (306) and the shell (3) are all made of polyether ether ketone plastic plates.

9. A method for detecting leakage of a municipal water supply network, using the leakage detector for a municipal water supply network according to claim 3, characterized in that The method mainly comprises the following steps: Step one, installation and deployment: install the circular sealing cover composed of two semi-circular sealing covers (2) at the interfaces of the two water supply pipelines (1) through fixing bolts (201) to complete the sealing and protection construction; Step two, long-term continuous detection: use the pressure sensor (301) on the shell (3) to continuously detect the pressure change inside the circular sealing cover and the shell (3) to determine whether the interface leaks; Step three, leakage response: if the water supply pipeline (1) interface leaks, the leaked water will enter the circular sealing cover, flow into the shell (3) through the communication pipe (302), and the water pressure will drive the moving plate (303) in the shell (3) to move against the elastic force of the extension spring (304); Step four, emergency plugging: the moving plate (303) drives the semi-circular sealing plate (306) through the connecting rod (305) to move towards the water supply pipeline (1) interface and tightly adhere to it to carry out emergency plugging on the leakage point; Step five, subsequent disposal: based on the detection and plugging feedback, the operation and maintenance personnel carry out pipeline repair, reinstall the circular sealing cover and related components after repair, restore the normal operation of the pipeline, and complete the leakage treatment closed loop.

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