High-sensitivity pipe network leak detection monitoring equipment

Abstract

A high-sensitivity pipe network leak detection monitoring device disclosed by the present invention comprises a monitoring device main body and a pipeline, the monitoring device main body and the pipeline are connected through a connection assembly, the monitoring device main body is provided with a transducer main body through an insertion assembly, and the bottom end in the transducer main body is provided with piezoelectric ceramics. A wire outlet hole is formed in the side wall of the transducer body, a plugging mechanism is arranged at the end, close to the connecting assembly, of the pipeline, and the monitoring equipment body is electrically connected with a monitoring system. The stainless steel shell is adopted, so that the structure is simpler, the process complexity in the development process of the transducer is reduced, the stainless steel shell is adopted, the waterproof capacity is better, and compared with a potting type transducer, the transducer has better pressure resistance and is suitable for being soaked in water for a long time or used in a humid environment; the thin piezoelectric ceramic wafer is adhered to the inner side of the stainless steel shell, a bending vibration mode is adopted, the bending vibration mode is suitable for working in a low-frequency band, and the low-frequency sensitivity is high.

Description

Technical Field

[0001] The invention relates to the technical field of pipe network monitoring, in particular to a high-sensitivity pipe network leakage monitoring device. Background Art

[0002] Underground pipelines are important infrastructure for the smooth supply of urban groundwater. The materials, methods, locations and environmental conditions of pipeline laying determine the reliability of pipelines to a certain extent. However, as the use time of pipelines gradually increases, pipeline leakage problems are inevitable, which affects the safety of underground water supply and causes inconvenience to residents' domestic water use. In addition, the economic losses caused by water leakage cannot be underestimated. Therefore, using pipeline network leak detection equipment to promptly detect pipeline anomalies and find leaking points is a necessary means to reduce economic losses.

[0003] In the pipe network leak detection equipment, the transducer plays an important role. The radiating surface of the transducer is in direct contact with the water medium. If an abnormal leakage occurs in the pipeline, the pressure balance in the pipeline will be broken, and the water medium will flow out to the leakage under the action of the pressure difference. Therefore, the acoustic information at the leakage will change. The changed acoustic information is transmitted to the processor through the transducer, and the leakage point is determined through the back-end signal analysis.

[0004] Therefore, the development of highly sensitive transducers is the key to enabling leak detection equipment to accurately detect leaks. In the limited space of the side leakage equipment, the transducer must also be small and light to facilitate installation and disassembly. In addition, the transducer needs to be in contact with water for a long time and must have good waterproofness and stability. In the pipeline, the fluid has a certain water pressure, and the design of the transducer still needs to consider pressure resistance, so a highly sensitive pipeline network leak detection monitoring device is needed. Summary of the invention

[0005] The purpose of the present invention is to provide a high-sensitivity pipe network leakage detection monitoring device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-sensitivity pipeline leakage monitoring device, comprising a monitoring device body and a pipeline, the monitoring device body and the pipeline are connected through a connecting component, the monitoring device body is provided with a transducer body through a plug-in component, a piezoelectric ceramic is provided at the bottom end of the transducer body, and a wire outlet hole is opened on the side wall of the transducer body, a sealing mechanism is provided at the end of the pipeline close to the connecting component, and the monitoring device body is electrically connected to a monitoring system.

[0007] Preferably, in order to facilitate connection and assembly and ensure firmness and sealing effect during use, the connection assembly includes a connecting flange arranged on the monitoring equipment body and the end of the pipeline, and mounting holes are equidistantly provided on the side surface of the connecting flange. The two mounting holes in the same horizontal direction are fixedly connected by bolts, and a rubber gasket is fixedly provided on the end of the connecting flange on the monitoring equipment body, and a connecting groove matching the rubber gasket is provided on the end of the connecting flange on the pipeline, and sealing textures that match each other are provided on the rubber gasket and the connecting groove.

[0008] Preferably, in order to facilitate installation of the transducer body and subsequent monitoring, the plug-in assembly includes a plug-in hole provided on the monitoring device body, and a sealing ring matching the plug-in hole is sleeved on the side surface of the transducer body.

[0009] Preferably, in order to be able to temporarily block both ends of the leak-detecting pipeline for preliminary treatment when a leak is detected, and to facilitate subsequent repair or replacement operations by staff, the blocking mechanism includes a mounting seat arranged on the pipeline near the end of the connecting flange, an air charging and discharging pump is fixedly provided on the mounting seat, a connecting pipe is provided at the output end of the air charging and discharging pump, an electric control valve is provided on the connecting pipe, the connecting pipe passes through the pipeline and extends to the interior where an elastic air bag is provided, and a positioning component matching the elastic air bag is provided inside the pipeline.

[0010] Preferably, in order to be able to temporarily block both ends of the leaking pipeline for preliminary treatment when a leak is detected, and to facilitate subsequent repair or replacement operations by staff, the positioning assembly includes positioning rings symmetrically arranged at both ends of the elastic inflatable bag, and rubber pads are provided at the ends of the two positioning rings that are close to each other, and a sealing ring is provided on the inner wall of the pipeline between the two positioning rings.

[0011] Preferably, in order to facilitate inflation and deflation, a certain limit is provided in the horizontal direction, and a limit ring is provided on the inner wall of the elastic inflatable bag.

[0012] Preferably, in order to facilitate monitoring, timely alarm processing can be performed when abnormalities and leaks occur, the monitoring system includes a control module, a wireless receiving module is electrically connected to the control module, the wireless receiving module is electrically connected to the wireless transmitting module, the wireless transmitting module is electrically connected to the monitoring and adjustment module, and the monitoring and adjustment module is used to monitor the leakage detection of the equipment body and the work of the blocking mechanism, which can facilitate temporary blocking of the leaking pipeline when a leak is detected;

[0013] Preferably, in order to facilitate monitoring and to provide timely warnings when abnormalities and leaks occur, the monitoring system also includes an alarm module electrically connected to the control module, which can be used to issue an alarm in time when abnormalities and leaks are detected. The control module is also electrically connected to a storage module for storing monitoring data to facilitate subsequent review.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) Compared with the previous potted transducer, the stainless steel shell makes the structure simpler and reduces the process complexity in the development of the transducer. The stainless steel shell has better waterproof ability and better pressure resistance than the potted transducer. It is suitable for the transducer to be soaked in water for a long time or used in a humid environment. The thin piezoelectric ceramic disc is bonded to the inner side of the stainless steel shell and adopts the vibration form of bending vibration. The vibration form of bending vibration is suitable for working in the low frequency band and has the characteristics of high low frequency sensitivity. In the range of 10Hz-2kHz, the transducer sensitivity is greater than -198dB;

[0016] (2) The monitoring device body can be conveniently connected to the pipeline through the provided connection assembly to ensure firmness and sealing effect during use. The provided sealing mechanism can temporarily seal both ends of the pipeline at the leak detection location when a leak is detected, so that pre-processing can be carried out before the staff arrives at the scene, which is also convenient for subsequent repair or replacement operations, making it more convenient and safer. The provided monitoring system can conveniently monitor the entire system, and timely detect alarms and pre-processing operations when a leak is detected, so that it can be handled quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a high-sensitivity pipe network leakage detection monitoring device proposed by the present invention;

[0018] Figure 2 This is a structural schematic diagram of a plug-in assembly and a transducer body in a high-sensitivity pipe network leakage monitoring device proposed by the present invention;

[0019] Figure 3 This is a structural schematic diagram of a transducer body in a high-sensitivity pipe network leakage monitoring device proposed by the present invention;

[0020] Figure 4 This is a structural schematic diagram of a connection component in a high-sensitivity pipe network leakage monitoring device proposed by the present invention;

[0021] Figure 5 This is a structural schematic diagram of a blocking mechanism in a high-sensitivity pipe network leakage monitoring device proposed by the present invention;

[0022] Figure 6 A partial structural schematic diagram of a blocking mechanism in a high-sensitivity pipe network leakage monitoring device proposed by the present invention;

[0023] Figure 7 A schematic diagram of a part of the structure of an elastic inflatable bag in a high-sensitivity pipe network leakage monitoring device proposed by the present invention;

[0024] Figure 8 This is a structural schematic diagram of a monitoring system in a high-sensitivity pipe network leakage monitoring device proposed by the present invention;

[0025] Fig. 9 This is a partial structural schematic diagram of a transducer body in a high-sensitivity pipe network leakage detection monitoring device proposed by the present invention;

[0026] Fig.10 This is a structural schematic diagram of a piezoelectric ceramic in a transducer body in a high-sensitivity pipe network leakage monitoring device proposed by the present invention when it is convex;

[0027] Fig.11 This is a structural schematic diagram of a piezoelectric ceramic in a transducer body in a high-sensitivity pipe network leakage monitoring device proposed by the present invention when it is concave.

[0028] In the figure: 1. Monitoring equipment body; 2. Transducer body; 3. Connecting flange; 4. Pipeline; 5. Mounting seat; 6. Charging and discharging air pump; 7. Plug hole; 8. Wire outlet hole; 9. Sealing ring; 10. Piezoelectric ceramic; 11. Mounting hole; 12. Rubber gasket; 13. Connecting groove; 14. Sealing texture; 15. Connecting pipe; 16. Electric control valve; 17. Positioning ring; 18. Rubber pad; 19. Sealing ring; 20. Elastic inflatable bag; 21. Limiting ring; 22. Control module; 23. Wireless receiving module; 24. Wireless transmitting module; 25. Monitoring and adjustment module; 26. Alarm module; 27. Storage module. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-Figure 11, an embodiment of the present invention: a high-sensitivity pipe network leakage monitoring device, including a monitoring device body 1 for monitoring pipe network leakage, a plug-in hole 7 of a plug-in assembly is provided on the main body 1, a transducer body 2 is plugged in the internal part, and a sealing ring 9 is provided on the outer part of the intersection, and a sealant is also applied to ensure the sealing performance, wherein the shell of the transducer body 2 is made of stainless steel, the sensitive element is a piezoelectric ceramic 10 disc, and the piezoelectric ceramic 10 disc is designed in the form of a flip electrode, which is convenient for leading the wire from the same side and the inner part of the stainless steel shell. The surface is sandblasted to increase the roughness of the inner surface to increase the bonding strength between the stainless steel shell and the piezoelectric ceramic 10 element. In the process of developing the transducer, the center of the piezoelectric ceramic 10 disc is ensured to coincide with the centroid of the bottom surface of the stainless steel shell to avoid sensitivity changes or insulation performance degradation caused by the deviation of the piezoelectric ceramic 10 disc. A wire outlet hole 8 is provided on the top side wall of the transducer body 2 to facilitate the lead-out of the wire. In order to ensure the sealing effect, a sealant can be used to seal the inner surface of the stainless steel shell with a thin disc of piezoelectric ceramic 10, such as Fig. 9 As shown in Figure 2, the bending vibration working mode of the transducer is realized. Fig.10 and 11 As shown, when the transducer works in a low-frequency band far away from the resonant frequency, the piezoelectric ceramic 10 produces expansion and contraction deformation along the radial direction when the alternating voltage acts, and drives the metal shell to bend upward when contracting, and drives the metal shell to bulge downward when stretching. The transducer has the characteristics of simple structure and simple manufacturing process. In addition, the stainless steel shell has high strength and strong pressure resistance, which solves the problems of waterproof and pressure resistance of the receiving transducer. The vibration form of bending vibration is adopted, which has the characteristics of high low-frequency sensitivity, achieving the index of transducer sensitivity greater than -198dB in the range of 10Hz-2kHz. In order to facilitate assembly, it is connected to the pipeline 4 through a connecting component, and can be set at intervals of 10m, 50m or 100m, etc. The installation interval is set and adjusted according to the actual situation, not only limited to the above distance, to ensure the monitoring effect of pipeline leakage detection.

[0031] See also Figure 1-Figure 11 In order to facilitate the connection and assembly of the monitoring device body 1 and ensure the sealing effect during the connection, the ends of the monitoring device body 1 and the pipeline 4 are welded with connecting flanges 3 of the connecting assembly, and the surrounding side surfaces are equidistantly provided with mounting holes 11, which can be conveniently connected and fixed by bolts. In order to ensure the sealing performance, the end of the connecting flange 3 on the monitoring device body 1 is bonded with a rubber gasket 12, and the end of the connecting flange 3 on the corresponding pipeline 4 is provided with a connecting groove 13. In order to ensure the sealing effect, the rubber gasket 12 and the connecting groove 13 are provided with sealing textures 14 that fit each other to improve the sealing effect;

[0032] In order to temporarily block the pipeline 4 at the leak detection location when a leak occurs in the pipeline 4, pretreatment can be performed before the staff arrives at the site. A mounting seat 5 of a blocking mechanism can be welded on the end of the pipeline 4 near the connecting flange 3, on which an air charging and discharging pump 6 is installed (composed of an air charging pump and an air suction pump, or other equipment, which can facilitate the inflation and exhaust operations, a relatively mature technology, which will not be described in detail here), a connecting pipe 15 is connected to its output end, and an electric control valve 16 is installed on it for easy control of opening and closing, the bottom end of the connecting pipe 15 passes through the pipeline 4 and extends to the inside where an elastic air bag 20 (the material can be made of The elastic inflatable bag 20 is made of elastic materials such as rubber), and in order to facilitate inflation and expansion in the vertical direction and vacuum contraction, a limiting ring 21 (which can be made of steel wire with certain elasticity and strength) is embedded in the inner wall of the elastic inflatable bag 20, which can limit the horizontal direction and facilitate inflation and contraction operations. In order to ensure the subsequent blocking effect, positioning rings 17 of the positioning assembly are symmetrically arranged at both ends of the elastic inflatable bag 20, and rubber pads 18 are bonded to the ends of the positioning rings 17 that are close to each other, and a sealing ring 19 is provided on the inner wall of the pipe 4 between the two positioning rings 17 to ensure the blocking effect after inflation.

[0033] See also Figure 1-Figure 11 In order to better monitor the leakage detection of the pipeline network and perform pre-processing operations after the leakage detection, a monitoring system is provided, including a control module 22, which can be conveniently used to process the control monitoring data. It is electrically connected to the monitoring and adjustment module 25 through the wireless receiving module 23 and the wireless transmitting module 24, and can realize wireless data transmission operation through wireless network, 5G, etc., which is a relatively mature technology and will not be described in detail here. The monitoring and adjustment module 25 is mainly used for monitoring the leakage detection of the monitoring equipment body 1 and controlling the operation of the blocking mechanism. It can be convenient to temporarily block the pipeline 4 for leakage detection when a leakage is detected, and the corresponding control module 22 is electrically connected to an alarm module 26, which can be composed of a buzzer and a warning light, and can promptly issue an alarm when an abnormality or leakage occurs, and the storage module 27 electrically connected thereto can conveniently store the monitoring data, etc., which can be convenient for subsequent review and viewing, etc., and can be stored in local storage and cloud storage, which is a relatively mature technology and will not be described in detail here.

[0034] Working principle: When the present invention is in use, when assembling the transducer body 2, it can be inserted into the plug hole 7 and initially plugged and fixed with the sealing ring 9, and then the sealant can be poured to ensure the sealing and firmness during use. The monitoring device body 1 can be assembled on the pipe 4 through the connecting flange 3, and the sealing texture 14 on the rubber gasket 12 and the connecting groove 13 are mutually interference-fitted, so the connection can be sealed. At this time, the pipe 4 can be monitored through the transducer body 2, and the vibration form of bending vibration is adopted, which has the characteristics of high low-frequency sensitivity. The monitoring and adjustment module 25 detects the signal, and the signal is transmitted through the wireless transmitting module 24 in cooperation with the wireless receiving module 23. The air is transmitted to the control module 22, and the alarm module 26 sounds an alarm. At the same time, the monitoring and adjustment module 25 controls the electric control valve 16 to open, and the air pump 6 works. The elastic air bag 20 is inflated through the connecting pipe 15, and is inflated with the cooperation of the limit ring 21. The rubber pad 18 and the sealing ring 19 on the end face of the positioning ring 17 can temporarily block the two ends of the pipeline 4 at the leak detection location to avoid further leakage. The blockage is performed before the staff arrives at the scene, and it is also convenient for the staff to repair or replace the leak detection pipeline 4. After the operation is completed, the air can be exhausted by the air pump 6, and the elastic air bag 20 shrinks and resets, and the pipeline 4 is connected, which will not affect the subsequent transportation operation.

[0035] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A highly sensitive pipe network leak detection monitoring device, comprising a monitoring device body (1) and a pipe (4), characterized in that: The monitoring device body (1) is connected to the pipeline (4) via a connecting assembly. The monitoring device body (1) is provided with a transducer body (2) via a plug-in assembly. A piezoelectric ceramic (10) is provided at the bottom of the transducer body (2). A wire outlet hole (8) is provided on the side wall of the transducer body (2). A sealing mechanism is provided at the end of the pipeline (4) close to the connecting assembly. The monitoring device body (1) is electrically connected to a monitoring system.

2. A highly sensitive pipe network leakage detection monitoring device according to claim 1, characterized in that: The connection assembly comprises a connection flange (3) arranged on a monitoring device body (1) and an end of a pipeline (4); mounting holes (11) are equidistantly provided on a circumferential side surface of the connection flange (3); two mounting holes (11) in the same horizontal direction are fixedly connected by bolts; a rubber gasket (12) is fixedly provided on the end of the connection flange (3) on the monitoring device body (1); a connection groove (13) matching the rubber gasket (12) is provided on the end of the connection flange (3) on the pipeline (4); and sealing textures (14) matching each other are provided on the rubber gasket (12) and the connection groove (13).

3. A highly sensitive pipe network leak detection monitoring device according to claim 2, characterized in that: The plug-in assembly comprises a plug-in hole (7) provided on a monitoring device body (1), and a sealing ring (9) matching the plug-in hole (7) is sleeved on the peripheral side of the transducer body (2).

4. A highly sensitive pipe network leakage detection monitoring device according to claim 3, characterized in that: The blocking mechanism comprises a mounting seat (5) arranged on the pipeline (4) near the end of the connecting flange (3), an inflation and deflation pump (6) is fixedly arranged on the mounting seat (5), a connecting pipe (15) is arranged at the output end of the inflation and deflation pump (6), an electric control valve (16) is arranged on the connecting pipe (15), the connecting pipe (15) passes through the pipeline (4) and extends to an elastic inflation bag (20) arranged inside, and a positioning component matching the elastic inflation bag (20) is arranged inside the pipeline (4).

5. A highly sensitive pipe network leakage detection monitoring device according to claim 4, characterized in that: The positioning assembly comprises positioning rings (17) symmetrically arranged at both ends of the elastic inflatable bag (20), a rubber pad (18) is provided at one end of the two positioning rings (17) close to each other, and a sealing ring (19) is provided on the inner wall of the pipe (4) between the two positioning rings (17).

6. A highly sensitive pipe network leakage detection monitoring device according to claim 5, characterized in that: The inner wall of the elastic inflatable bag (20) is provided with a limiting ring (21).

7. A highly sensitive pipe network leakage detection monitoring device according to claim 6, characterized in that: The monitoring system comprises a control module (22), the control module (22) is electrically connected to a wireless receiving module (23), the wireless receiving module (23) is electrically connected to a wireless transmitting module (24), the wireless transmitting module (24) is electrically connected to the monitoring and regulating module (25), and the monitoring and regulating module (25) is used to monitor the leakage detection of the equipment body (1) and the operation of the blocking mechanism, so that the pipeline (4) detected by the leakage can be temporarily blocked when a leakage is detected.

8. A highly sensitive pipe network leakage detection monitoring device according to claim 7, characterized in that: The monitoring system further comprises an alarm module (26) electrically connected to the control module (22) and capable of generating an alarm in a timely manner when an abnormality or leakage is detected. The control module (22) is also electrically connected to a storage module (27) for storing the monitored data and the like for easy subsequent review.

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