RU39709U1 - HYDROACOUSTIC ANTENNA CLINKET - Google Patents

Abstract

Clinket for a sonar antenna belongs to the field of marine instrumentation and is designed to install an echo sounder antenna or an absolute lag on a ship afloat without using a diver. The clinket contains a hollow hull, in the lower part of which is flush with the bottom of the vessel a soundproof waterproof membrane is installed. It can be reinforced with metal elements, for example, steel bars.

Description

The utility model relates to the field of marine instrumentation and is intended to install or replace an echo sounder antenna or an absolute lag for a ship afloat without the use of a diver.

Known clinkets for placing in them the receiving tubes of the hydrodynamic relative lags (Khrebtov A.A. et al. Ship speed meters. - L .: Sudostroenie, 1978, Fig. 2.17; Vinogradov K.A. et al. Absolute and relative logs. Reference . - L.: Shipbuilding, 1990, p.140, Fig. 8.6).

These clinkets consist of a hollow hull, with the possibility of its mounting above the hole in the bottom of the vessel and a shut-off valve and sealing means (gland) located in the hull installed above the shut-off valve.

The receiving tube is installed in the hole in the upper part of the wedge-ket housing with the shut-off valve closed, after which the latter is opened, the receiving tube is lowered into the working position and the gland is sealed. To remove the receiving tube, the above steps are performed in reverse order.

The disadvantages of these clinkets are insufficient operational reliability and high cost.

In these designs, the locking device and the clinket as a whole are constantly exposed to sea water. In this regard, they are made of expensive non-ferrous metals. However, the experience of seawater, even when using non-ferrous metals, can lead to failure of the locking device, jamming of its drive from salt deposition.

Closest to the outboard devices of marine navigation devices is the closest to the claimed utility model (RF patent No. 2122213). The hollow body of this clinket is made detachable in height, and the sealing means is located in the lower clinket assembly fixed above the hole in the bottom of the ship's hull, and the locking device is located in the upper removable clinket assembly, which is used only during installation or replacement of the hydroacoustic antenna. When the upper clinket assembly is removed, the prevention of the outboard water entering the ship’s compartment is provided by sealing means located in the lower clinket assembly.

The disadvantage of the prototype is the complexity of the design, including mechanical moving parts of the locking device, insufficient operational reliability due to the presence of sealing glands that lose their tightness during operation, the complexity of the process of replacing the outboard device, which includes installing the removable part of the clinket before actually removing the outboard device.

Known clinkets are used to place outboard assemblies with relatively small cross-sectional areas. To ensure the installation of an echo sounder antenna or an absolute lag and similar larger nodes, known clinket designs would require a significant increase in weight and size characteristics.

The essence of the claimed utility model consists in the fact that a soundproof waterproof membrane made, for example, of polyurethane, is installed in the lower part of the hollow clinket body, which can be sealed above the hole in the bottom of the vessel. It can be reinforced with metal elements, for example, mutually intersecting steel bars.

In a clinket intended to be mounted on a flat-bottomed vessel, said membrane has a disk-like shape with parallel upper and lower surfaces.

In a clinket designed to be installed on a ship having a keeled position, i.e. raising the bottom of the ship from the keel to the sides, the outer surface of the membrane repeats the contours of the bottom of the ship.

The problem to which the claimed utility model and technical result is directed is to simplify the design of the clinket and increase its reliability in terms of preventing seepage from seeping through the clinket.

The drawing shows in section a hermetically sealed over a hole in the bottom of a flat-bottomed vessel clinket with a sonar antenna located in it.

The clinket consists of a hollow hull 1, hermetically fixed by means of a weld 2 to the bottom 3 of the vessel. In the lower part of the hull 1 is installed flush with the bottom of the vessel 3 waterproof membrane transparent for acoustic vibrations 4. It can be made of polyurethane by pouring, followed by polymerization. The membrane can be reinforced with metal elements, for example, steel bars (not shown in the drawing).

In the case 1 of the clinket there is a hydroacoustic antenna 5 with cable 6. The upper part of the antenna 5 is isolated from the case 1 of the clinket by means of a rubber lining 7 and a union nut 8.

Since the internal volume of the vessel’s compartment is isolated from seawater by the clinket body 1 and the waterproof membrane 4 located in its lower part, the installation (replacement) of the hydroacoustic antenna 5 with cable 6 can be carried out afloat. To do this, unscrew the union nut.

8, remove the antenna 5 with the cable 6 and the rubber gasket 7. The antenna 5 is installed in the reverse order. To ensure acoustic contact of the radiating surface of the antenna with a translucent membrane 4 between them create a liquid and grease film.

The performance of the inventive clinket is confirmed by testing its prototype.

Claims (3)

1. Clinket for sonar antennas containing a hollow body, characterized in that in its lower part is installed a soundproof waterproof membrane. 2. The clinket according to claim 1, characterized in that the said membrane is reinforced with metal elements, for example steel bars. 3. The clinket according to claim 1, characterized in that the said membrane is mounted flush with the bottom of the vessel.