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Waterproof structure of piezoelectric ultrasonic transducer

A waterproof structure, piezoelectric ultrasonic technology, applied in the direction of the measuring device shell, etc., can solve the problems of affecting the measurement accuracy, affecting the service life of the transducer, and difficult to achieve waterproofing, so as to achieve the effect of improving the sealing performance

Inactive Publication Date: 2012-06-06
NINGBO UNIV
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Problems solved by technology

[0002] The piezoelectric ultrasonic transducer (also called the probe) consists of a stainless steel shell, an acoustic wedge at the front end of the shell, and a piezoelectric chip fixed on the back of the sound wedge inside the shell, and the lead wire of the piezoelectric chip and the cable penetrating into the shell. The connection is the most commonly used transducer device in ultrasonic testing to realize the mutual conversion of electric energy and sound energy, and is an important part of the ultrasonic testing device. The waterproof structure of the existing piezoelectric ultrasonic transducers mostly adopts a cylindrical shell Epoxy resin encapsulation, but in the case of high liquid pressure, it is difficult to achieve a completely waterproof effect, which not only affects the service life of the transducer, but also seriously affects the measurement accuracy, and once it leaks, it will not work normally

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  • Waterproof structure of piezoelectric ultrasonic transducer
  • Waterproof structure of piezoelectric ultrasonic transducer
  • Waterproof structure of piezoelectric ultrasonic transducer

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Embodiment Construction

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] Such as figure 1 , figure 2 As shown, a waterproof structure of a piezoelectric ultrasonic transducer includes a cylindrical shell 1, a shell cap 2 is provided at one end of the shell 1, and a sound wedge 4 is provided at the other end, and the gap between the sound wedge 4 and the shell cap 2 is A piezoelectric chip is provided, a first sealing device 5 is provided between the inner end surface 3 of the casing and the end surface of the sound wedge, and a second sealing device 8 is arranged between the inner surface of the casing and the outer peripheral wall of the sound wedge.

[0020] Wherein, the inner end surface 3 of the housing is provided with a first annular groove, and the first sealing device 5 is a first O-shaped sealing ring inserted in the first annular groove; the sound wedge annular groove 6 is provided on the outer p...

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Abstract

The invention discloses a waterproof structure of a piezoelectric ultrasonic transducer, which comprises a cylindrical shell. One end of the shell is provided with a shell cap, and the other end of the shell is provided with an acoustic wedge; a piezoelectric wafer is arranged between the acoustic wedge and the shell cap. The waterproof structure is characterized in that: a first sealing device is arranged between the inner end face of the shell and the end face of the acoustic wedge; and a second sealing device is arranged between the inner surface of the shell and the peripheral wall of theacoustic wedge. The waterproof structure of the piezoelectric ultrasonic transducer has the advantages of realizing multiple seal in different directions, improving sealing performance, and achievingcompletely waterproof effect even under high water pressure.

Description

technical field [0001] The invention relates to a waterproof structure, in particular to a waterproof structure of a piezoelectric ultrasonic transducer. Background technique [0002] The piezoelectric ultrasonic transducer (also called the probe) consists of a stainless steel shell, an acoustic wedge at the front end of the shell, and a piezoelectric chip fixed on the back of the sound wedge inside the shell, and the lead wire of the piezoelectric chip and the cable penetrating into the shell. The connection is the most commonly used transducer device in ultrasonic testing to realize the mutual conversion of electric energy and sound energy, and is an important part of the ultrasonic testing device. The waterproof structure of the existing piezoelectric ultrasonic transducers mostly adopts a cylindrical shell Epoxy resin encapsulation, but in the case of high liquid pressure, it is difficult to achieve a completely waterproof effect, which not only affects the service life ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D11/26
Inventor 朱莹杜呈透姚灵王让定李志民陈昌根段允王亚华
Owner NINGBO UNIV
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