Mechanical noise amplifier and pipeline leakage detection device for pipeline leakage

Abstract

The present application relates to a kind of mechanical noise amplifier for pipeline leakage, including amplifier main body, resonant cavity, the emitting end of resonant cavity is close to the outer end of amplifier main body, the outer diameter of resonant cavity receiving end is greater than the outer diameter of resonant cavity emitting end, the length of resonant cavity is L, the target frequency of amplification is, the length of resonant cavity is determined according to formula, wherein c is the propagation speed of sound in fluid medium, the inner end face of amplifier main body is equipped with receiving surface, receiving surface is directly contacted with fluid medium;The outer end face of amplifier main body is equipped with emitting surface, and the receiving end of sound vibration sensor is attached to emitting surface.The present application is connected by mechanical noise amplifier on pipe wall or valve body, can amplify the leakage noise transmitted by fluid medium while avoiding leakage, improve the detection distance of sound vibration sensor, expand the monitoring radius of leakage monitoring device, is conducive to the reduction of monitoring equipment arrangement point number.

Description

Technical Field

[0001] This utility model relates to a pipeline leakage detection device, and in particular to a mechanical noise amplifier and a pipeline leakage detection device for pipeline leakage. Background Technology

[0002] Water supply networks are crucial urban infrastructure, playing a vital role in ensuring urban socio-economic development and the well-being of residents. Over time, water supply networks age under pressure and corrosion, making them prone to leakage. Leaks not only waste the costs of water intake, treatment, and distribution within the urban water supply system but also increase investment in its construction. Furthermore, if leaks go undetected for extended periods, they can compromise the safety of buildings and roads, potentially causing casualties, property damage, and disrupting social production and people's lives. Prevention is better than cure. Currently, preventing leaks in water supply networks primarily relies on manual inspection and maintenance using leak detection instruments. This method is extremely resource-intensive, and in urban water networks, the spacing between valve wells providing space for manual detection is typically around 2 km, while current leak detection equipment generally has an effective detection range of only about 500 m, insufficient to cover all pipes. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a mechanical noise amplifier and a pipeline leakage detection device for pipeline leakage.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a mechanical noise amplifier for pipeline leakage, comprising an amplifier body and a resonant cavity disposed within the amplifier body. The receiving end of the resonant cavity is close to the inner end of the amplifier body, and the emitting end of the resonant cavity is close to the outer end of the amplifier body. The outer diameter of the receiving end of the resonant cavity is larger than the outer diameter of the emitting end of the resonant cavity. The length of the resonant cavity is L, and the target frequency amplified is [missing value]. The length of the resonant cavity is based on the formula It is determined that c is the speed of sound propagation in the fluid medium, the inner end face of the amplifier body is provided with a receiving surface that is directly opposite the receiving end of the resonant cavity, and the receiving surface is in direct contact with the fluid medium; the outer end face of the amplifier body is provided with an emitting surface that is directly opposite the emitting end of the resonant cavity, and the emitting surface is in contact with the receiving end of the sound vibration sensor.

[0005] As a further improvement to this design, the amplifier body is made of magnetically oriented material and is made of 3D-printed high-strength stainless steel.

[0006] As a further improvement to this design, the emitting end of the amplifier body is arranged in a ring around the center of the emitting surface with magnetic attractors made of magnetic material.

[0007] As a further improvement to this design, a limiting ring is provided at the inner end of the amplifier body. The limiting ring is integral with the amplifier body, and the outer diameter of the limiting ring is larger than that of the amplifier body. The amplifier body is provided with connecting threads, and the inner edge of the amplifier is provided with a slot for easy insertion of installation tools.

[0008] As a further improvement to this design, the edge of the limiting ring is chamfered, and the width of the chamfer is equal to the height of the limiting ring exposed from the mounting hole.

[0009] As a further improvement to this design, the resonant cavity is logarithmically spiral-shaped, the cross-section of the resonant cavity is a gradually changing circular cross-section, the receiving end of the resonant cavity is provided with a receiving port, the receiving port is horn-shaped and the expansion angle is 50°-70°, and the emitting end of the resonant cavity facing the emitting surface is a plane.

[0010] As a further improvement to this design, the inner wall of the resonant cavity is provided with a sawtooth structure, with a tooth depth of 50μm and a spacing of 1mm.

[0011] A pipeline leakage detection device including a mechanical noise amplifier includes a mounting screw hole, a mechanical noise amplifier threaded into the mounting screw hole, and a sound vibration sensor connected to the transmitting end of the mechanical noise amplifier. The mounting screw hole is a threaded through hole penetrating the side wall of a pipeline or valve body. The receiving end of the sound vibration sensor is attached to the transmitting surface, and the receiving surface is in direct contact with the fluid medium inside the valve body.

[0012] As a further improvement to this design, the mounting screw hole is a stepped hole, the limiting ring protrudes from the inner wall of the pipe, and the edge of the limiting ring is chamfered, which extends to the opening of the mounting screw hole.

[0013] As a further improvement to this design, a sealing ring is fitted onto the mechanical noise amplifier, and the sealing ring is clamped at the bottom of the countersunk hole of the limiting ring and the mounting screw hole.

[0014] The beneficial effects of this utility model are as follows: This utility model uses a mechanical noise amplifier threaded onto the pipe wall or valve body, which amplifies the leakage noise transmitted by the fluid medium while preventing leakage, thereby increasing the detection distance of the sound vibration sensor, expanding the monitoring radius of the leakage monitoring device, and reducing the number of monitoring equipment deployment points, thus reducing the cost of monitoring equipment in smart pipeline networks; the mechanical noise amplifier amplifies noise of specific frequencies, which can filter out unwanted noise and improve detection accuracy; the cavity length is set to about 1 / 4 wavelength to form a stable standing wave; at the same time, the standing wave amplification effect is achieved through resonance with the cavity, which significantly increases the amplitude energy. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the resonant cavity structure of this utility model.

[0019] Figure 4 This is a schematic diagram of the second embodiment of the present invention.

[0020] Figure 5 This is an overall schematic diagram of the present invention installed on the valve of the present invention.

[0021] Figure 6 This is a partial schematic diagram of the present invention installed on the valve of the present invention.

[0022] In the diagram: 1. Amplifier body, 2. Receiver port, 3. Receiver surface, 4. Resonant cavity, 5. Emitter surface, 6. Slot, 7. Chamfer, 8. Limiting ring, 9. Connecting thread, 10. Valve body, 11. Sound vibration sensor, 12. Mechanical noise amplifier, 13. Sealing ring, 14. Mounting screw hole, 15. Wireless signal transmission module. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions are only used to explain the present invention and are not intended to limit the present invention. Example

[0024] A mechanical noise amplifier 12 for pipe leakage includes an amplifier body 1 and a resonant cavity 4 disposed within the amplifier body 1. The receiving end of the resonant cavity 4 is close to the inner end of the amplifier body 1, and the emitting end of the resonant cavity 4 is close to the outer end of the amplifier body 1. The outer diameter of the receiving end of the resonant cavity 4 is larger than the outer diameter of the emitting end of the resonant cavity 4. The length of the resonant cavity 4 is L, and the target frequency amplified is [missing value]. The length of resonant cavity 4 is based on the formula It is determined that c is the speed of sound propagation in the fluid medium, the target frequency range is 1000Hz-2000Hz, the inner end face of the amplifier body 1 is provided with a receiving surface 3 facing the receiving end of the resonant cavity 4, and the receiving surface 3 is in direct contact with the fluid medium; the outer end face of the amplifier body 1 is provided with an emitting surface 5 facing the emitting end of the resonant cavity 4, and the emitting surface 5 is attached to the receiving end of the sound vibration sensor 11.

[0025] The aforementioned mechanical noise amplifier 12 is threaded onto the pipe wall or valve body 10. While preventing leakage, it amplifies the leakage noise transmitted by the fluid medium, increases the detection distance of the sound vibration sensor 11, expands the monitoring radius of the leakage monitoring device, and helps to reduce the number of monitoring equipment deployment points, thereby reducing the cost of monitoring equipment in the smart pipeline network. The mechanical noise amplifier 12 amplifies noise of specific frequencies and can filter out unwanted noise, improving detection accuracy.

[0026] To facilitate the magnetic mounting of the sound vibration sensor 11, the amplifier body 1 is made of a magnetically oriented material. To facilitate the molding and processing of the resonant cavity 4, the amplifier body 1 is made of 3D-printed high-strength stainless steel.

[0027] To facilitate the selection of materials for the main body of the amplifier, the emitting end of the amplifier body is arranged in a circular array around the center of the emitting surface with magnetic attracting elements made of magnetic material. The magnetic attracting elements can be made of steel screws or the like.

[0028] To reduce sound wave absorption, the amplifier body 1 is made of a material with a sound wave reflectivity >90%.

[0029] To improve the connection strength of the amplifier body 1, a limiting ring 8 is provided at the inner end of the amplifier body 1. The limiting ring 8 is integral with the amplifier body 1, and the outer diameter of the limiting ring 8 is larger than that of the amplifier body 1. To facilitate the installation of the amplifier body 1, a connecting thread 9 is provided on the amplifier body 1, and a slot 6 is provided on the inner edge of the amplifier to facilitate the insertion of installation tools.

[0030] In order to reduce the disturbance of the water body by the limiting ring 8 and thus reduce the interference to the detection, the edge of the limiting ring 8 is provided with a chamfer 7, the width of which is equal to the height of the limiting ring 8 exposed from the mounting hole.

[0031] The resonant cavity 4 is logarithmically spiral-shaped, enabling efficient, high-bandwidth, and low-loss collection and amplification of mechanical waves. The resonant cavity 4 has a circular, gradually changing cross-section. Its receiving end has a receiving port 2, which is horn-shaped with an expansion angle of 50°-70°. The emitting end of the resonant cavity 4 is planar, facing the emitting surface 5, and can provide a sound pressure gain of 20dB-25dB.

[0032] To improve the sound wave reflection efficiency, the inner wall of the resonant cavity 4 is provided with a sawtooth structure with a tooth depth of 50μm and a spacing of 1mm.

[0033] A pipe leakage detection device including a mechanical noise amplifier 12 includes a mounting screw hole 14, a mechanical noise amplifier 12 threaded into the mounting screw hole 14, and a sound vibration sensor 11 connected to the transmitting end of the mechanical noise amplifier 12. The mounting screw hole 14 is a threaded through hole penetrating the side wall of a pipe or valve body 10. The receiving end of the sound vibration sensor is attached to the transmitting surface 5, and the receiving surface 3 is in direct contact with the fluid medium inside the valve body 10.

[0034] To improve the connection strength of the mechanical noise amplifier 12, the mounting screw hole 14 is a stepped hole, the limiting ring 8 is exposed on the inner wall of the pipe, and the edge of the limiting ring 8 is provided with a chamfer 7, which extends to the opening of the mounting screw hole 14.

[0035] To prevent leakage at the connection of the mechanical noise amplifier 12, a sealing ring 13 is fitted on the mechanical noise amplifier 12, and the sealing ring 13 is clamped at the bottom of the countersunk hole of the limiting ring 8 and the mounting screw hole 14.

[0036] To facilitate remote monitoring, the vibration sensor is connected to the wireless signal transmission module 15, and the wireless signal transmission module 15 is used to complete the signal transmission with external devices. Example

[0037] The difference between this embodiment and the other embodiments is that the emitting end of the amplifier body has a circular array of magnetic attractors made of magnetic material around the center of the emitting surface. These magnetic attractors can be made of steel screws or similar materials. This allows for easier selection of materials for the amplifier body. The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A mechanical noise amplifier for pipe leakage, characterized in that, The amplifier includes an amplifier body and a resonant cavity disposed within the amplifier body. The receiving end of the resonant cavity is close to the inner end of the amplifier body, and the emitting end of the resonant cavity is close to the outer end of the amplifier body. The outer diameter of the receiving end of the resonant cavity is larger than the outer diameter of the emitting end of the resonant cavity. The length of the resonant cavity is L, and the target frequency amplified is [missing value]. The length of the resonant cavity is based on the formula It is determined that c is the speed of sound propagation in the fluid medium, the inner end face of the amplifier body is provided with a receiving surface that is directly opposite the receiving end of the resonant cavity, and the receiving surface is in direct contact with the fluid medium; the outer end face of the amplifier body is provided with an emitting surface that is directly opposite the emitting end of the resonant cavity, and the emitting surface is in contact with the receiving end of the sound vibration sensor.

2. A mechanical noise amplifier for pipeline leakage according to claim 1, characterized in that, The amplifier body is made of magnetically oriented material and is made of 3D-printed high-strength stainless steel.

3. A mechanical noise amplifier for pipeline leakage according to claim 1, characterized in that, The amplifier body has a ring array of magnetic attractors made of magnetic material around the center of the emitting surface at the emitting end.

4. A mechanical noise amplifier for pipeline leakage according to claim 1, characterized in that, The amplifier body has a limiting ring at its inner end, which is integral with the amplifier body. The outer diameter of the limiting ring is larger than that of the amplifier body. The amplifier body has a connecting thread, and the inner edge of the amplifier has a slot for easy insertion of installation tools.

5. A mechanical noise amplifier for pipeline leakage according to claim 4, characterized in that, The limiting ring has a chamfered edge, and the width of the chamfer is equal to the height of the limiting ring exposed from the mounting hole.

6. A mechanical noise amplifier for pipeline leakage according to claim 4, characterized in that, The resonant cavity is logarithmically spiral-shaped, and the cross-section of the resonant cavity is a gradually changing circular cross-section. The receiving end of the resonant cavity is provided with a receiving port, which is horn-shaped and has an expansion angle of 50°-70°. The emitting end of the resonant cavity facing the emitting surface is a plane.

7. A mechanical noise amplifier for pipeline leakage according to claim 6, characterized in that, The inner wall of the resonant cavity is provided with a sawtooth structure, with a tooth depth of 50μm and a spacing of 1mm.

8. A pipe leakage detection device comprising the mechanical noise amplifier as described in claim 1, characterized in that, The device includes a mounting screw hole, a mechanical noise amplifier threaded into the mounting screw hole, and a sound vibration sensor connected to the transmitting end of the mechanical noise amplifier. The mounting screw hole is a threaded through hole penetrating the side wall of a pipe or valve body. The receiving end of the sound vibration sensor is attached to the transmitting surface, and the receiving surface is in direct contact with the fluid medium in the pipe.

9. A pipe leakage detection device including a mechanical noise amplifier according to claim 8, characterized in that, The mounting screw hole is a stepped hole, and the limiting ring protrudes from the inner wall of the valve body. The edge of the limiting ring is chamfered, and the chamfer extends to the opening of the mounting screw hole.

10. A pipe leakage detection device including a mechanical noise amplifier according to claim 9, characterized in that, The mechanical noise amplifier is fitted with a sealing ring, which is clamped at the bottom of the countersunk hole of the limiting ring and the mounting screw hole.

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