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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a conventional wave
transmitter, FIG. 2 is a view showing corrosion damage of the wave transmitter, and FIG. 3 is a
cross-sectional view of a corrosion-resistant wave transmitter of the present invention. FIG. 4 is
an enlarged sectional view of an essential part of the embodiment, and FIG. 5 is an explanatory
view showing a corrosion bit of a conventional product. 2 ... fixed plate, 5 ... diaphragm, 9 ... seal
ring groove, 13a to 13c ... elastic body, 14 ... titanium layer, 15 ... anticorrosive.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transmitter for
exciting and transmitting ultrasonic waves by electromagnetic vibration. As shown in FIG. 1, the
conventional seed wave transmitter is mounted on the main body 1 with the vibration plate 5 to
which one vibration (1), /. The elastic material is arranged on the fixed plate 2 attached via the
bolt 3 and the seal ring 8 so as to be supported via the rubber support 4. The above-mentioned
wave transmitter is made of metallurgically nonmagnetic metal material as known, and the
material includes aluminum alloy, austenitic stainless steel, titanium alloy and the like. Among
these materials, aluminum alloys are widely used because they have the advantage of being
lightweight, but the aluminum alloys suffer from corrosion problems when used in a seawater
environment because they have poor corrosion resistance. The reason is that as shown in FIG. 2,
the gap 10 between the joint surfaces of the main body 1 and the fixed plate 2, the peeling
portion 11 of the joint surface between the rubber support 4 and the mounting plate 2 made of
aluminum alloy and the diaphragm 5; Sea water penetrates in 12i and causes crevice corrosion in
the aluminum alloy of the material. The present invention aims at providing the above-mentioned
K or a person who does not generate crevice corrosion (2) a corrosion-resistant wave transmitter,
and a fixed plate on which a diaphragm equipped with a vibrator is fixed to a main body (1) In
the wave transmitter supported to support via the elastic body, the surface of the diaphragm and
the outer peripheral surface of the fixed plate are covered with the elastic body, and the coated
elastic body and the support elastic body are integrally formed. It is characterized by the fact that
One embodiment of the present invention will be described below with reference to the drawings.
Of the reference numerals shown in FIGS. 3 and 4, the same reference numerals as those shown
in FIG. 1 denote the same parts. In FIGS. 3 and 4, reference numeral 13 denotes a covering layer
13b covering the surface of the diaphragm 50, a covering layer 13C supporting an outer
peripheral surface of the fixed plate 2, and an interval between the diaphragm 5 and the fixed
plate 2. A support formed integrally with the support portion 13a and made of an elastic material
such as rubber. The covering layer 13C is partially filled in the seal ring groove 9 as shown in
FIG. 4, and the seal ring 8 is compressed to prevent the intrusion of seawater. 7, (3) 14 is a
titanium layer or resin layer covering the outer surface of the main body 1 in contact with the
fixing plate 2, ie the outer surface exposed to seawater etc., 15 is an anticorrosive filled in the
seal ring groove 9 And 40 to 44% of fine zinc powder, 35 to 39% of polystyrene polymer, 5 to
19% of siloxane resin, and 1 to 30% of fine silicon dioxide powder.
The other structure is the same as that of the conventional row shown in FIG. In the present
embodiment, since the elastic covering layer 13C and the titanium layer or the resin layer 14 are
interposed between the main body 1 and the fixing plate 2 as described above, seawater adheres
from the outside due to the close contact of both 13C and 14. Can be prevented. Since the elastic
covering layer 13b provided on the surface of the diaphragm 50 and the elastic covering layer
13C provided on the outer peripheral surface of the fixed plate 2 and the elastic supporting part
13M are integrally formed, the both 5.2 and the elastic supporting part 13a Between each of the
two can prevent the intrusion of seawater from the outside. In the event that seawater intrudes
into the seal ring groove 9, the zinc in the composition of the anticorrosive 15 preferentially
dissolves in the aluminum (4) ram alloy, so the aluminum alloy of the fixed plate 2 is protected. .
Furthermore, since the eluted zinc becomes basic zinc hydroxide to make the entering irrigation
water basic, the passivation film formed on the surface of the aluminum alloy becomes stable.
Therefore, according to this embodiment, it is possible to completely prevent the occurrence of
the corroded portions 10-12 as in the prior art shown in FIG. After immersing the product of the
present invention and the conventional product in artificial seawater for K100O time, they were
decomposed and examined for corrosion state. When the conventional product was subjected to
the above-mentioned section, many damages due to crevice corrosion were found. The
distribution of corrosion pits generated when the fixed plates were joined was as shown in FIG.
However, no corrosion damage was observed in the present invention. As described above,
according to the present invention, the occurrence of crevice corrosion can be prevented, the
reliability of the product can be improved, and the life can be extended.
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