A dual-layer piezoelectric sound acquisition device for pipeline leak detection

Abstract

This utility model discloses a double-layer piezoelectric sound acquisition device for pipeline leak detection, comprising an outer cylinder, an inner cylinder, an adjustment mechanism, a double piezoelectric structure, and a acquisition body. The acquisition body is disposed inside the outer cylinder. The bottom side of the outer cylinder is open, and a receiving cavity is formed inside the outer cylinder. The inner cylinder and the adjustment mechanism are both disposed within the receiving cavity. The adjustment mechanism is located on the side of the inner cylinder away from the open, and the adjustment mechanism is driven and connected to the inner cylinder. A detection cavity is formed inside the inner cylinder, and a acquisition port communicating with the detection cavity is opened on the side of the inner cylinder away from the adjustment mechanism. The double piezoelectric structure is disposed on the side of the receiving cavity away from the acquisition port, and the double piezoelectric structure is electrically connected to the acquisition body. The adjustment mechanism is used to drive the inner cylinder to move towards the open, so that the acquisition port of the inner cylinder abuts against the ground near the open. In the technical solution proposed by this utility model, the adjustment mechanism drives the inner cylinder to abut against the ground through the open, ensuring that the acquisition port of the inner cylinder is always in contact with the ground when acquiring audio, thus guaranteeing accurate acquisition of sound wave data.

Description

Technical Field

[0001] This utility model relates to the field of underground pipeline leakage technology, and in particular to a double-layer piezoelectric sound collector for pipeline leak detection. Background Technology

[0002] A sound sensor is a sensor device specifically designed to detect and locate the sound of fluid leaks in piping systems. When fluids (water, gas, oil, etc.) leak from a ruptured pipe under high pressure, they generate sound waves or vibration signals of specific frequencies. These signals propagate along the pipe wall or through the medium, and the sound sensor detects and locates leaks early by capturing these subtle acoustic features. Currently, sound sensors typically have an opening at the bottom for audio acquisition. This design is suitable for relatively flat areas, but on uneven surfaces, the overall use of the sound sensor becomes inconvenient and affects audio acquisition. Utility Model Content

[0003] The main purpose of this invention is to provide a double-layer piezoelectric sound acquisition device for pipeline leak detection, which aims to solve the problem that the overall use of the sound acquisition device will be inconvenient and will affect the audio acquisition when the road surface is uneven.

[0004] To achieve the above objectives, the technical solution proposed by this utility model is as follows: A dual-layer piezoelectric sound collector for pipeline leak detection includes an outer cylinder, an inner cylinder, an adjustment mechanism, a dual piezoelectric structure, and a collector body. The collector body is disposed inside the outer cylinder. The bottom side of the outer cylinder is open, and a receiving cavity is formed inside the outer cylinder. The inner cylinder and the adjustment mechanism are both disposed within the receiving cavity. The adjustment mechanism is located on the side of the inner cylinder away from the open, and is driven and connected to the inner cylinder. A detection cavity is formed inside the inner cylinder. A collection port communicating with the detection cavity is opened on the side of the inner cylinder away from the adjustment mechanism. The dual piezoelectric structure is disposed on the side of the receiving cavity away from the collection port, and is electrically connected to the collector body. The adjustment mechanism is used to drive the inner cylinder to move towards the open, so that the collection port of the inner cylinder abuts against the ground near the open.

[0005] Preferably, the dual piezoelectric structure includes a connecting beam and two piezoelectric ceramic plates, the two piezoelectric ceramic plates being located on the side of the detection cavity away from the acquisition port; both piezoelectric ceramic plates are vertically arranged and parallel to each other, a connecting beam is provided between the two piezoelectric ceramic plates, one end of the connecting beam is connected to one of the piezoelectric ceramic plates, and the other end of the connecting beam is connected to the other piezoelectric ceramic plate, the two piezoelectric ceramic plates are electrically connected to the acquisition body, and the acquisition body is used to convert the amplitude signals of the two piezoelectric ceramic plates into information data.

[0006] Preferably, an elastic layer is provided at the collection port.

[0007] Preferably, two mounting holes are provided on the side of the receiving cavity away from the opening; the adjustment mechanism includes two spring springs, one end of each spring spring is connected to the inner cylinder, one end of one spring spring away from the inner cylinder extends into one of the mounting holes and is connected to the bottom of the hole, and the other end of the spring spring away from the inner cylinder extends into the other mounting hole and is connected to the bottom of the hole.

[0008] Preferably, a sliding groove is provided in the receiving cavity, and the sliding groove is arranged vertically; a slider is provided on the side of the inner cylinder away from the collection port, the slider is slidably connected to the sliding groove, and the slider is located between the two elastic springs.

[0009] Preferably, a connection interface is provided at the end of the outer cylinder away from the opening, the connection interface being electrically connected to the main body of the data collector, and the connection interface being used for detachable electrical connection of external cables.

[0010] Preferably, a telescopic rod is provided on the side of the outer cylinder away from the opening, one end of the telescopic rod is detachably connected to the outer cylinder, and the other end of the telescopic rod is provided with a handle.

[0011] Preferably, a connecting seat is provided on the side of the outer cylinder away from the opening. The connecting seat is located on one side of the connecting interface, and a connecting screw hole is opened on the side of the connecting seat away from the outer cylinder. A connecting thread is provided on the end of the telescopic rod away from the handle, and the telescopic rod and the connecting seat are detachably threaded together.

[0012] Preferably, the handle is provided with a buckle.

[0013] Compared with the prior art, the present invention has at least the following beneficial effects: By using a dual piezoelectric structure to collect sound wave data, external interference is effectively reduced and the sensitivity to sound wave data is higher; the adjustment mechanism drives the inner cylinder to contact the ground through the opening, ensuring that the inner cylinder's acquisition port is always in contact with the ground when collecting audio, thus guaranteeing accurate acquisition of sound wave data. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of an embodiment of the double-layer piezoelectric sound collector of this utility model applied to pipeline leak detection; Figure 2 This is a schematic diagram of the structure inside the outer cylinder.

[0016] Explanation of icon numbers: 1-Outer cylinder; 11-Receiving cavity; 12-Mounting hole; 13-Slide groove; 14-Connection interface; 15-Connecting seat; 16-Connecting screw hole; 2-Inner cylinder; 21-Detection chamber; 22-Collection port; 23-Elastic layer; 24-Slider; 3-Elastic spring; 4-Double piezoelectric structure; 41-Connecting beam; 42-Piezoelectric ceramic sheet; 5-Telescopic rod; 51-Handle; 52-Snap fastener; The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0019] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] This invention proposes a double-layer piezoelectric sound acquisition device for pipeline leak detection.

[0023] like Figure 1 and Figure 2 The illustrated dual-layer piezoelectric sound collector for pipeline leak detection includes an outer cylinder 1, an inner cylinder 2, an adjustment mechanism, a dual piezoelectric structure 4, and a collector body. The collector body is located inside the outer cylinder 1. The bottom side of the outer cylinder 1 is open, and a receiving cavity 11 is provided inside the outer cylinder 1. The inner cylinder 2 and the adjustment mechanism are both located inside the receiving cavity 11. The adjustment mechanism is located on the side of the inner cylinder 2 away from the open, and the adjustment mechanism is connected to the inner cylinder 2. A detection cavity 21 is formed inside the inner cylinder 2. A collection port 22 communicating with the detection cavity 21 is opened on the side of the inner cylinder 2 away from the adjustment mechanism. The dual piezoelectric structure 4 is located on the side of the receiving cavity 11 away from the collection port 22, and the dual piezoelectric structure 4 is electrically connected to the collector body. The adjustment mechanism is used to drive the inner cylinder 2 to move towards the open so that the collection port 22 of the inner cylinder 2 abuts against the ground near the open.

[0024] The dual piezoelectric structure 4 is used to collect sound wave data, which effectively reduces external interference and has higher sensitivity to sound wave data. The adjustment mechanism drives the inner cylinder 2 to contact the ground through the opening, ensuring that the collection port 22 of the inner cylinder 2 is always in contact with the ground when collecting audio, thus ensuring accurate collection of sound wave data.

[0025] The dual piezoelectric structure 4 includes a connecting beam 41 and two piezoelectric ceramic plates 42. The two piezoelectric ceramic plates 42 are located on the side of the detection chamber 21 away from the acquisition port 22. Both piezoelectric ceramic plates 42 are vertically arranged and parallel to each other. A connecting beam 41 is provided between the two piezoelectric ceramic plates 42. One end of the connecting beam 41 is connected to one of the piezoelectric ceramic plates 42, and the other end is connected to the other piezoelectric ceramic plate 42. The two piezoelectric ceramic plates 42 are electrically connected to the main body of the acquisition unit, which is used to convert the amplitude signals of the two piezoelectric ceramic plates 42 into information data. The structure of the two piezoelectric ceramic plates 42 forms a double-layer structure. When the double-layer structure receives sound wave data, it will generate mechanical vibration through the connecting beam 41. When the frequency of the sound wave is consistent with the natural frequency of the piezoelectric ceramic plate 42, resonance is triggered, forming a significant vibration amplitude and realizing a synergistic resonance effect. When the target detection quantity is applied to the double-layer structure, the strength information of the target quantity is accurately collected by detecting the change in the frequency resonance amplitude, thereby providing more accurate pipeline leak detection results.

[0026] Specifically, the connecting beam 41 is made of copper sheet so that the two piezoelectric ceramic sheets 42 can better achieve mechanical resonance.

[0027] An elastic layer 23 is provided at the acquisition port 22. The elastic layer 23 facilitates the better transmission of acoustic data into the detection cavity 21.

[0028] Two mounting holes 12 are provided on the side of the cavity 11 away from the opening; the adjustment mechanism includes two spring springs 3, one end of each spring spring 3 is connected to the inner cylinder 2, one end of one spring spring 3 away from the inner cylinder 2 extends into one of the mounting holes 12 and is connected to the bottom of the hole, and the other end of the spring spring 3 away from the inner cylinder 2 extends into the other mounting hole 12 and is connected to the bottom of the hole.

[0029] Specifically, the vertical length of the elastic spring 3 is greater than the depth of the mounting hole 12.

[0030] Specifically, the two mounting holes 12 and the two spring springs 3 are symmetrically arranged along the central axis of the inner cylinder 2.

[0031] A sliding groove 13 is provided inside the receiving cavity 11, and the sliding groove 13 is arranged vertically. A slider 24 is provided on the side of the inner cylinder 2 away from the collection port 22. The slider 24 is slidably connected to the sliding groove 13 and is located between two spring springs 3. The cooperation between the slider 24 and the sliding groove 13 allows the inner cylinder 2 to move vertically, ensuring the stability of the inner cylinder 2 during movement. A connection interface 14 is provided at the end of the outer cylinder 1 furthest from the opening. The connection interface 14 is electrically connected to the main body of the data acquisition unit and is used for detachable electrical connection of external cables. The dual-layer piezoelectric sound acquisition unit needs to be used with external headphones so that staff can listen to the audio converted from information data to determine whether there is leakage. Therefore, the data cable of the external headphones is connected through the connection interface 14.

[0032] A telescopic rod 5 is also installed on the side of the outer cylinder 1 away from the open end. One end of the telescopic rod 5 is detachably connected to the outer cylinder 1, and the other end of the telescopic rod 5 is equipped with a handle 51. The combination of the telescopic rod 5 and the handle 51 facilitates the use of the equipment by the staff, eliminating the need for them to bend over for extended periods to listen to the audio.

[0033] A connecting seat 15 is also provided on the side of the outer cylinder 1 away from the open end. The connecting seat 15 is located on one side of the connecting interface 14, and a connecting screw hole 16 is opened on the side of the connecting seat 15 away from the outer cylinder 1. A connecting thread is provided on the end of the telescopic rod 5 away from the handle 51, and the telescopic rod 5 and the connecting seat 15 are detachably threaded together. The threaded connection between the telescopic rod 5 and the connecting seat 15 facilitates the disassembly of the outer cylinder 1 and the telescopic rod 5, making it easier for staff to store the double-layer piezoelectric sound collector into the box for transportation.

[0034] The handle 51 is equipped with a clip 52. Clip 52 is used to secure the headphone cable and prevent it from becoming tangled and affecting the use by staff during movement.

[0035] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A double-layer piezoelectric sound acquisition device for pipeline leak detection, characterized in that, The device includes an outer cylinder, an inner cylinder, an adjustment mechanism, a dual piezoelectric structure, and a collector body. The collector body is disposed inside the outer cylinder. The bottom side of the outer cylinder is open, and a receiving cavity is formed inside the outer cylinder. The inner cylinder and the adjustment mechanism are both disposed within the receiving cavity. The adjustment mechanism is located on the side of the inner cylinder away from the open, and the adjustment mechanism is driven and connected to the inner cylinder. A detection cavity is formed inside the inner cylinder, and a collection port communicating with the detection cavity is opened on the side of the inner cylinder away from the adjustment mechanism. The dual piezoelectric structure is disposed on the side of the receiving cavity away from the collection port, and the dual piezoelectric structure is electrically connected to the collector body. The adjustment mechanism is used to drive the inner cylinder to move towards the open, so that the collection port of the inner cylinder abuts against the ground near the open.

2. The double-layer piezoelectric sound acquisition device for pipeline leak detection according to claim 1, characterized in that, The dual piezoelectric structure includes a connecting beam and two piezoelectric ceramic plates. The two piezoelectric ceramic plates are located on the side of the detection cavity away from the acquisition port. Both piezoelectric ceramic plates are arranged vertically and are parallel and spaced apart. A connecting beam is provided between the two piezoelectric ceramic plates. One end of the connecting beam is connected to one of the piezoelectric ceramic plates, and the other end of the connecting beam is connected to the other piezoelectric ceramic plate. The two piezoelectric ceramic plates are electrically connected to the acquisition body. The acquisition body is used to convert the amplitude signals of the two piezoelectric ceramic plates into information data.

3. A double-layer piezoelectric sound acquisition device for pipeline leak detection according to claim 1, characterized in that, An elastic layer is provided at the collection port.

4. A double-layer piezoelectric sound acquisition device for pipeline leak detection according to claim 1, characterized in that, Two mounting holes are provided on the side of the receiving cavity away from the opening; the adjustment mechanism includes two spring springs, one end of each spring spring is connected to the inner cylinder, one end of one spring spring away from the inner cylinder extends into one of the mounting holes and is connected to the bottom of the hole, and the other end of the spring spring away from the inner cylinder extends into the other mounting hole and is connected to the bottom of the hole.

5. A double-layer piezoelectric sound acquisition device for pipeline leak detection according to claim 4, characterized in that, A sliding groove is provided inside the receiving cavity, and the sliding groove is arranged vertically; a slider is provided on the side of the inner cylinder away from the collection port, and the slider is slidably connected to the sliding groove, and the slider is located between the two elastic springs.

6. A double-layer piezoelectric sound acquisition device for pipeline leak detection according to any one of claims 1-5, characterized in that, A connection interface is provided at the end of the outer cylinder away from the opening. The connection interface is electrically connected to the main body of the data collector and is used for detachable electrical connection of external cables.

7. A double-layer piezoelectric sound acquisition device for pipeline leak detection according to claim 6, characterized in that, A telescopic rod is also provided on the side of the outer cylinder away from the opening. One end of the telescopic rod is detachably connected to the outer cylinder, and the other end of the telescopic rod is provided with a handle.

8. A double-layer piezoelectric sound acquisition device for pipeline leak detection according to claim 7, characterized in that, A connecting seat is provided on the side of the outer cylinder away from the opening. The connecting seat is located on one side of the connecting interface, and a connecting screw hole is opened on the side of the connecting seat away from the outer cylinder. A connecting thread is provided on the end of the telescopic rod away from the handle, and the telescopic rod and the connecting seat are detachably threaded together.

9. A double-layer piezoelectric sound acquisition device for pipeline leak detection according to claim 7, characterized in that, The handle is equipped with a buckle.

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