Probe structure of electronic leakage listening instrument

Abstract

The utility model discloses a probe structure of an electronic leakage listening instrument, and belongs to the technical field of electronic leakage listening instruments. Comprising a base, a shell is detachably and fixedly installed on the base, a circular boss is arranged at the center of the base, an isolation column and a mass block are fixedly installed at the top of the circular boss through bolts, the isolation column is sleeved with piezoelectric ceramics and conductive silver pieces, and the conductive silver pieces and the piezoelectric ceramics are stacked at the top of the circular boss at intervals. The isolation column, the piezoelectric ceramic and the conductive silver sheet are all located in the mass block, a five-core aviation plug is installed in the center of the top of the shell, one end of the five-core aviation plug is connected with a PCB signal board, and the PCB signal board is electrically connected with the conductive silver sheet. The device is convenient to mount and dismount, good in sealing performance, accurate in signal acquisition and stable in structure.

Description

Technical Field

[0001] This utility model relates to the field of electronic leak detector technology, specifically to a probe structure for an electronic leak detector. Background Technology

[0002] In various pipeline systems, such as water and gas supply pipelines, leaks not only waste resources but can also lead to safety accidents. Traditional leak detection methods rely mainly on manual experience, which is inefficient and inaccurate.

[0003] The advent of electronic leak detectors has greatly improved the effectiveness of leak detection, but existing electronic leak detector probes have many shortcomings in their structural design. Some probes have complex structures, making installation and disassembly inconvenient and hindering rapid detection; some probes have poor sealing performance, making them susceptible to interference from the external environment and affecting detection accuracy; and some probes have poor sensor contact stability, leading to inaccurate signal acquisition. Utility Model Content

[0004] The purpose of this utility model is to provide an electronic leak detector probe structure, which aims to solve at least one of the technical problems of inconvenient installation, poor sealing and unstable signal acquisition in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An electronic leak detector probe structure includes a base, on which a housing is detachably and fixedly mounted. Multiple support columns are evenly distributed at the bottom of the base. A circular boss is located at the center of the base. An isolation column and a mass block are fixedly mounted on the top of the circular boss via bolts. A piezoelectric ceramic and a conductive silver sheet are fitted over the isolation column. The conductive silver sheet and the piezoelectric ceramic are stacked alternately on the top of the circular boss. The isolation column, piezoelectric ceramic, and conductive silver sheet are all located within the mass block. A five-pin aviation connector is installed at the center of the top of the housing. One end of the five-pin aviation connector is connected to a PCB signal board, which is electrically connected to the conductive silver sheet.

[0007] As a further embodiment of this utility model: the outer shell is fixedly connected to the base by threads, and a sealing ring is provided at the connection between the outer shell and the base.

[0008] As a further embodiment of this utility model: an anti-loosening positioning pin and a spring are provided at the joint between the outer shell and the base, the spring being located at the bottom of the anti-loosening positioning pin and embedded in the base.

[0009] As a further embodiment of this utility model, a rubber buffer pad is provided at the connection between the mass block and the base.

[0010] As a further embodiment of this utility model, it also includes a rubber protective sleeve, which is integrally wrapped around the base and the outer periphery of the outer shell.

[0011] As a further embodiment of this utility model: the sealing ring is made of rubber with a thickness of 1-2 mm and a compression rate of 20%-40%.

[0012] As a further embodiment of this utility model: the isolation column is made of nylon and has a height of 5-8mm.

[0013] As a further embodiment of this utility model: the piezoelectric ceramic is a PZT5 piezoelectric ceramic sheet.

[0014] As a further embodiment of this utility model: the conductive silver sheet is made of silver foil material with a thickness of 0.1-0.3mm.

[0015] As a further embodiment of this utility model: the mass block is made of brass and weighs 70-90g.

[0016] The beneficial effects of this utility model are:

[0017] (1) This utility model is easy to install and disassemble: the bolt connection method makes the installation and disassembly of each component simple and quick, and facilitates maintenance and replacement of parts.

[0018] (2) Good sealing performance: The design of the sealing ring effectively blocks the interference of the external environment, improves the waterproof and dustproof performance of the probe, and extends the service life of the probe.

[0019] (3) Accurate signal acquisition: The piezoelectric ceramic and the pipe are in good contact through the spring, the mass block optimizes the resonant frequency, and the PCB signal board and conductive silver sheet ensure stable signal transmission and processing. These designs work together to greatly improve the accuracy of signal acquisition and detection precision.

[0020] (4) Stable structure: The 6061 aluminum alloy shell and SUS304 stainless steel base, as well as the anti-loosening positioning pins and bolts, make the entire probe structure stable and reliable, and can adapt to different working environments. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the probe structure of an electronic leak detector according to this utility model;

[0023] Figure 2 This is an exploded view of the probe structure of an electronic leak detector according to this utility model;

[0024] Figure 3This is a schematic diagram of the internal structure of the mass block of this utility model;

[0025] Figure 4 This is a cross-sectional schematic diagram of the probe structure of an electronic leak detector according to this utility model.

[0026] In the diagram: 1. PCB signal board; 2. Conductive silver sheet; 3. Mass block; 4. Bolt; 5. Isolation post; 6. Five-pin aviation connector; 7. Anti-loosening positioning pin; 8. Sealing ring; 9. Spring; 10. Housing; 11. Support post; 12. Piezoelectric ceramic; 13. Base; 14. Rubber buffer pad; 15. Rubber protective sleeve; 16. Circular boss. Detailed Implementation

[0027] The technical solutions in the embodiments of this utility model are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this utility model.

[0029] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] Please see Figure 1-4As shown, this embodiment of the invention provides an electronic leak detector probe structure, including a base 13, on which a housing 10 is detachably and fixedly mounted. Multiple support columns 11 are evenly distributed at the bottom of the base 13. The base 13 is made of SUS304 stainless steel, and the housing 10 is made of 6061 aluminum alloy. The housing 10 is fixedly connected to the base 13 by threads. The base 13 and housing 10 protect the internal components and provide overall structural support. A sealing ring 8 is provided at the connection between the housing 10 and the base 13. The sealing ring 8 is made of rubber, with a thickness of 1-2 mm and a compression rate of 20%-40%. The sealing ring 8 effectively prevents external dust, moisture, etc., from entering the probe, ensuring the normal operation of the internal electronic components.

[0031] Please see Figure 3 As shown, in this embodiment, the base 13 has a circular boss 16 at its center. (See also...) Figure 4 As shown, the top of the circular boss 16 is fixedly mounted with the isolation column 5 and the mass block 3 by bolts 4. Bolts 4 are used to secure the various components, ensuring the stability of the entire probe structure. The isolation column 5 is made of nylon and has a height of 5-8mm to prevent electrical short circuits between the PCB signal board 1 and the base 13. A rubber buffer pad 14 is provided at the connection between the mass block 3 and the base 13. The mass block 3 is made of H68 brass and weighs 70-90g. The vertical position of the mass block 3 can be adjusted using bolts 4. By adjusting the weight and position of the mass block 3, the inertial system of the probe is changed, allowing its resonant frequency to match the dominant frequency of the pipeline leakage vibration, thereby improving signal sensitivity. H68 brass has a high density (8.5g / cm³). 3 It has strong corrosion resistance and can be used for a long time in humid environments. Mass block 3 is available in various sizes (such as 10g, 15g, 20g) for quick replacement according to testing needs.

[0032] Please see Figure 3 As shown, the isolation post 5 is fitted with a piezoelectric ceramic 12 and a conductive silver sheet 2, with the conductive silver sheet 2 and the piezoelectric ceramic 12 stacked at intervals on top of the circular boss 16. (See also...) Figure 4As shown, the isolation column 5, piezoelectric ceramic 12, and conductive silver sheet 2 are all located within the mass block 3. The piezoelectric ceramic 12 is preferably a PZT5 (lead zirconate titanate piezoelectric ceramic 12) sheet. The piezoelectric ceramic 12 converts the mechanical vibrations generated by pipe leakage into electrical signals. PZT5 has an excellent piezoelectric constant (d33≥500pC / N), can capture minute vibrations, and has high sensitivity. Its frequency range covers 50Hz-5kHz, adapting to different leakage scenarios, and its operating temperature range is -20℃-80℃, suitable for complex outdoor environments. Compared to other piezoelectric materials (such as quartz and PVDF), PZT5 has a higher electromechanical coupling coefficient and signal-to-noise ratio, making it particularly suitable for low-frequency vibration detection, and its cost is controllable. The mass block 3 applies vertical pressure to the piezoelectric ceramic 12 to ensure a tight fit between the probe and the pipe surface, avoiding signal attenuation due to poor contact. The conductive silver sheet 2 uses silver foil material with a purity ≥99.9%, a thickness of 0.1-0.3mm, and a surface coating with anti-oxidation treatment to ensure long-term conductive stability. A five-pin aviation connector 6 is mounted at the center of the top of the outer casing 10. One end of the five-pin aviation connector 6 is connected to a PCB signal board 1. The PCB signal board 1 and the conductive silver sheet 2 are electrically connected via a cable harness. The five-pin aviation connector 6 is used to realize the electrical connection between the probe and external equipment, transmitting the collected signals to subsequent processing equipment. The vibration signal generated by the pipeline leak is converted into an electrical signal by the piezoelectric ceramic 12. The electrical signal is transmitted to the PCB signal board 1 for processing and amplification via the conductive silver sheet 2. The processed signal is then transmitted to external equipment for analysis and display via the five-pin aviation connector 6.

[0033] Further, please refer to Figure 4 As shown, an anti-loosening positioning pin 7 and a spring 9 are also provided at the joint between the outer shell 10 and the base 13. The spring 9 is located at the bottom of the anti-loosening positioning pin 7 and is embedded in the base 13. The anti-loosening positioning pin 7 further strengthens the connection between the outer shell 10 and the base 13, preventing them from loosening and separating during use. The base 13 and the outer shell 10 are wrapped with an integrally formed rubber protective sleeve 15 to protect the base 13 and the outer shell 10.

[0034] In practical use, the electronic leak detector probe is first connected to the external testing equipment via the five-pin aviation connector 6. Then, the probe is placed on the surface of the pipe to be tested. The vibration signal generated by the pipe leak is converted into an electrical signal by the piezoelectric ceramic 12. This electrical signal is transmitted to the PCB signal board 1 for processing and amplification via the conductive silver sheet 2. The processed signal is then transmitted to the external device for analysis and display via the five-pin aviation connector 6.

[0035] In addition, if the probe needs to be repaired or parts replaced during use, simply unscrew bolt 4 to easily disassemble components such as the outer shell 10 and the base 13 for operation.

[0036] The preferred embodiments of this utility model have been described in detail above and should not be considered as limiting the scope of this utility model. All equivalent changes and improvements made within the scope of the claims of this utility model should still fall within the patent coverage of this utility model.

Claims

1. An electronic listening device probe structure, comprising a base (13), a shell (10) is detachably fixedly installed on the base (13), and a plurality of supporting columns (11) are uniformly arranged on the bottom of the base (13), characterized in that: The base (13) has a circular boss (16) in the center, the top of which is fixedly installed with an isolation column (5) and a mass block (3) through a bolt (4), the isolation column (5) is sleeved with a piezoelectric ceramic (12) and a conductive silver sheet (2), the conductive silver sheet (2) is stacked with the piezoelectric ceramic (12) on the top of the circular boss (16), the isolation column (5), the piezoelectric ceramic (12) and the conductive silver sheet (2) are located in the mass block (3), a five-core aviation plug (6) is installed at the top center of the shell (10), one end of the five-core aviation plug (6) is connected with a PCB signal plate (1), and the PCB signal plate (1) is electrically connected with the conductive silver sheet (2).

2. An electronic leak detector probe structure according to claim 1, characterized in that: The shell (10) is fixedly connected with the base (13) through threads, and a sealing ring (8) is arranged at the connecting position of the shell (10) and the base (13).

3. An electronic leak detector probe structure according to claim 2, characterized in that: A loosening prevention positioning pin (7) and a spring (9) are further arranged at the abutting position of the shell (10) and the base (13), the spring (9) is arranged at the bottom of the loosening prevention positioning pin (7) and is embedded in the base (13).

4. The probe structure of claim 1, wherein: A rubber buffer pad (14) is arranged at the connecting position of the mass block (3) and the base (13).

5. The probe structure of claim 1, wherein: A rubber protective sleeve (15) is further arranged, which integrally wraps the outer periphery of the base (13) and the shell (10).

6. An electronic leak detector probe structure according to claim 2, characterized in that: The sealing ring (8) is made of rubber, has a thickness of 1-2mm and a compression rate of 20%-40%.

7. The probe structure of claim 1, wherein: The isolation column (5) is made of nylon and has a height of 5-8mm.

8. The probe structure of claim 1, wherein: The piezoelectric ceramic (12) is a PZT5 piezoelectric ceramic sheet.

9. The probe structure of claim 1, wherein: The conductive silver sheet (2) is made of silver foil and has a thickness of 0.1-0.3mm.

10. The probe structure of claim 1, wherein: The mass block (3) is made of brass and has a weight of 70-90g.

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