JP2007150425A - Sonar dome made of fiber reinforced plastics - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sonar dome made of fiber reinforced plastics that dispenses with facilities, such as a costal plant having a large site, can be transported easily, and can facilitate molding workability. <P>SOLUTION: A sonar dome body 4 is divided into at least two with the fiber reinforced plastics, where a resin material is impregnated into reinforced fiber 5, as a material. The divided bodies 4a, 4b of the sonar dome body 4 are assembled in one piece via a joint means 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sonar dome made of fiber reinforced plastic, and more particularly to a sonar dome made of fiber reinforced plastic with improved molding workability of a sonar dome body.

  Conventionally, the sonar dome that protects the transducers (acoustic sensors, etc.) installed on observation ships has been known to be installed at the bottom of the ship or at the bow to improve acoustic performance. In order to reduce the influence of noise and vibration from own ship and underwater noise generated from other equipment, a structure that is attached to the bow side has become the mainstream (see, for example, Patent Document 1).

  As a conventional sonar dome mounting structure, for example, as shown in FIGS. 3 and 4, the transducer 3 is accommodated in the cavity 2 at the lower part of the bow of the hull 1, and the transducer 3 and the cavity 2 are accommodated. The sonar dome body 4 is airtightly attached so as to cover.

  The sonar dome body 4 can be attached to the hull 1 by attaching a fiber reinforced plastic (FRP) composite dome to the hull by tightening it with a fastening member such as a bolt, or a rubber sonar dome. When attaching a main body, the method of attaching by a bead is known.

By the way, the sonar dome main body 4 is a large structure, and when the sonar dome main body 4 is manufactured by integral molding as a fiber reinforced plastic (FRP) structure, the factory site is wide as in other countries and restricted to transportation, etc. There is no support for production in places where there is no. However, when there are certain restrictions on the site and transportation as in Japan, if the large sonar dome body 4 as described above is formed integrally, it can be manufactured, but road traffic regulations dictate that the road It becomes difficult to transport, and in order to manufacture the sonar dome body 4 by integral molding, there is a problem that a facility such as a coastal factory with a large site is required, and if there is no facility such as a critical factory Has a problem that it is difficult to manufacture the sonar dome body 4 by integral molding.
JP-A-8-327726

  This invention was devised by paying attention to such conventional problems, by dividing the sonar dome made of fiber reinforced plastic into a plurality of parts, and combining the divided molded parts to form an integrated structure, An object of the present invention is to provide a fiber-reinforced plastic sonar dome that does not require facilities such as a coastal factory with a large site, can be easily transported, and can facilitate molding workability.

  In order to achieve the above object, the present invention comprises a sonar dome body divided into at least two or more parts using a fiber reinforced plastic sheet in which a reinforcing fiber is impregnated with a resin material. The gist of the present invention is that the structure is integrated with the joining means.

  Here, the sonar dome main body is divided into two parts, and the joining means is joined by a fastening joint structure or a resin joint method.

  By comprising in this way, facilities, such as a critical factory with a large site, are not required, transportation is also easy, and molding workability | operativity can be made easy.

According to the present invention, as described above, the sonar dome main body is divided into at least two parts using a fiber reinforced plastic sheet in which a reinforcing fiber is impregnated with a resin material, and the sonar dome main body is joined. Since the structure is integrated through the means, the following excellent effects can be obtained.
(a) It is possible to enable road transportation, which was impossible to be integrally formed as in the prior art.
(b) Since there is no need for facilities such as a coastal factory with a large site required for integral molding, the equipment cost can be reduced and the cost of the sonar dome body can be reduced.
(c) When the entire sonar dome main body is integrally molded as in the prior art, there is a problem that the molding risk is increased, but in this invention, the sonar dome main body is made of a fiber reinforced plastic sheet as a material, at least. By dividing into two or more parts and molding, even if the molding fails, it is only necessary to mold the part that failed, so the molding risk is reduced, and maintenance part replacement work etc. can be done easily. I can do it.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. Note that the same components as those in the conventional example are denoted by the same reference numerals and description thereof is omitted.

  FIG. 1 is a partially enlarged sectional view of a sonar dome showing a first embodiment of the present invention. The sonar dome body 4 is made of at least two fiber reinforced plastic sheets obtained by impregnating reinforcing fibers 5 with a resin material. The sonar dome main body 4 is divided into four or more parts, and the divided bodies 4 a and 4 b of the sonar dome body 4 are assembled together through the joining means 6.

  In this embodiment, the sonar dome main body 4 is divided into two parts 4a and 4b. However, the sonar dome body 4 may be divided into two or more parts. As shown in FIG. 1, the joining means 6 is formed with flanges 7a and 7b inside the joined portions of the split bodies 4a and 4b of the sonar dome body 4, and the flanges 7a and 7b are fastened and fixed by bolts 8. Further, as in the second embodiment of FIG. 2, after joining the bonded portions of the divided bodies 4a and 4b of the sonar dome main body 4 and bonding them, the fiber reinforced plastic sheets 9a and 9b are attached to the front and back surfaces thereof with an adhesive. It is also possible to reinforce by adhering or by adhering by a hand-up method which is one of resin joint molding methods.

  As for the sound transmission loss, which is a function as the sonar dome body 4, the resin joint molding method such as the hand-up method is more acoustic loss than the method of joining the flanges 7a and 7b and the bolt 8 shown in FIG. It turned out to be excellent. Further, the joining means 6 is not limited to the above-described embodiment, and can be performed by other methods.

  The present invention comprises a sonar dome main body 4 divided into at least two parts using a fiber reinforced plastic sheet in which a reinforcing fiber 5 is impregnated with a resin material as described above. Since 4a and 4b are integrally formed through the joining means 6, facilities such as a coastal factory with a large site are not required, transportation is facilitated, and molding workability can be facilitated.

It is a partial expanded sectional view of the sonar dome which shows 1st Embodiment of this invention. It is a partially expanded sectional view of the sonar dome which shows 2nd Embodiment of this invention. It is explanatory drawing of the observation ship which attached the conventional sonar dome. It is a perspective view of the conventional sonar dome main body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hull 2 Cavity part 3 Transmitter / receiver 4 Sonar dome main body 4a, 4b Sonar dome main body 5 Reinforcing fiber 6 Joining means 7a, 7b Flange 8 Bolt 9a, 9b Fiber reinforced plastic sheet

Claims (3)

In a sonar dome made of fiber reinforced plastic, in which a transmitter / receiver is accommodated in a hollow portion on the bow side of the hull, and a sonar dome body is hermetically attached so as to cover the transmitter / receiver and the hollow portion,
The sonar dome main body is composed of a fiber reinforced plastic sheet in which a reinforcing fiber is impregnated with a resin material, and is divided into at least two parts, and the sonar dome main body is integrated into a single structure through a joining means. A sonar dome made of fiber reinforced plastic. The fiber-reinforced plastic sonar dome according to claim 1, wherein the sonar dome main body is divided into two parts. The fiber-reinforced plastic sonar dome according to claim 1, wherein the joining means is joined by a fastening joint structure or a resin joint method.

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