CN106394822A - Ship retractable type bilge keel device using guide rails - Google Patents

Abstract

The invention provides a ship retractable bilge keel device using guide rails. A bilge keel main board is welded on the hull, a traveling guide rail is arranged on the bilge keel main board, a retractable sub-board and a retractable sub-board are installed in the traveling guide rail. The middle position is hinged with one end of the double-head hydraulic push rod, and a driving guide rail is arranged along the bilge of the hull, and a hydraulic rod is arranged in the drive guide rail, and the rod end of the hydraulic rod is hinged with the other end of the double-head hydraulic push rod. The width of the bilge keel of the invention can be expanded, the structure is simple, and the volume is small, and it is especially suitable for large and medium-sized ships with limited space in the bilge.

Description

A ship retractable bilge keel device using guide rails

technical field

The invention relates to a ship retractable bilge keel device using guide rails, belonging to the field of ships and ocean engineering.

Background technique

In the past hundred years, people have been devoting themselves to the research of measures and devices to slow down the rolling motion of ships. Hundreds of different types of anti-rolling devices have been developed in various countries in the world, but only bilge keels, fin stabilizers and Stabilizer water tank. Among them, the bilge keel is more popular because of its simple structure, low cost, good performance and easy maintenance.

The bilge keel is a fixed anti-rolling device that generates a stabilizing moment according to the action of hydrodynamic force. It is installed on the bilge on both sides of the hull and does not participate in the overall longitudinal bending of the hull. The outer plating of the bilge of the hull is vertical, and there are two types: continuous and discontinuous. The installation of the bilge keel on the ship is mainly to increase the vortex damping to slow down the roll, thereby reducing the roll angle of the ship. The anti-rolling effect of the bilge keel is closely related to the width of the bilge keel. The wider the bilge keel, the larger the area, and the better the anti-rolling effect. The traditional bilge keel has a maximum width limit of within the maximum limits of the amidship section. The purpose of this patent is to invent a bilge keel with a better anti-rolling effect. The width of the bilge keel exceeds the maximum boundary of the midship section. The bilge keel is retracted in shallow waters, when docking at the wharf, and when supplying and operating. The bilge keel is deployed when there are no ships or structures on the sea around, which can improve the anti-rolling effect and is not easy to be damaged.

After searching, it was found that the patent application No. 201510974534.9 of the invention patent "an expandable openable bilge keel" adopts the clam-type bilge keel, and the clamshell bilge keel is near the bilge, and the effective area of the bilge keel is increased by opening and closing the clamshell bilge keel , increase the roll damping to reduce the roll of the ship, but this method has little effect on the roll moment, and the anti-roll efficiency is not high, and this method uses a gear shaft system, and the transmission system has a complex structure and is not easy to maintain. The invention patent with the patent application number of 201510974535.3 "A Control Method for the Clam-type Bilge Keel" also uses the clam-type bilge keel. The gear shaft system adopted cannot provide sufficient strength support for the two clamshell bilge keels at the shaft, and the traditional system is also prone to failure and difficult to maintain. The present invention is obviously different from the existing related inventions in technology and principle, the design is more reasonable, the anti-rolling is more efficient and easy to use and maintain.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings of existing anti-rolling devices such as limited installation space, complex structure, high cost, and low efficiency, and at the same time provide a ship retractable bilge using guide rails based on the principles of simple structure and high efficiency The keel device is a device that can reduce the roll angle of the ship under the action of waves.

The purpose of the present invention is achieved in this way: the hull is welded with the bilge keel main board, the bilge keel main board is provided with a traveling guide rail, a retractable sub-board is installed in the travel guide rail, and the middle position of the retractable sub-board is connected to the double-head hydraulic pusher. One end of the rod is hinged, a driving guide rail is arranged along the bilge of the hull, a hydraulic rod is arranged in the driving guide rail, and the rod end of the hydraulic rod is hinged with the other end of the double-headed hydraulic push rod.

The present invention also includes such structural features:

1. Both the traveling guide rail and the driving guide rail are corrosion-resistant structures.

Compared with the prior art, the beneficial effect of the present invention is that the width of the bilge keel of the present invention can be expanded, the structure is simple, and the volume is small, and it is especially suitable for large and medium-sized ships with limited space in the bilge. The retractable bilge keel device enables the ship to flexibly respond to different sailing conditions and requirements. When the navigating sea conditions are bad or there is a high demand for stability, the bilge keel sub-plate can be fully or partially released according to the demand, so as to reduce rolling and enhance stability; when facing small wind and waves or docking at the port, then Retract the bilge keel sub-plate to prevent damage to the hull from bottoming out and collisions. In the process of retracting the retractable sub-board, the pressure rod driving device forms a Y-shaped structure with the main board of the bilge keel, the retractable sub-board and the hull. This structure can play a very good role in strengthening the device. The retractable auxiliary plate is fully retracted, and most of the double-headed hydraulic push rods are retracted to the inside of the bilge molding line, and the device does not damage the original hull molding line and will not generate additional resistance.

Description of drawings

Fig. 1 is the basic structure schematic diagram of the retractable bilge keel of a kind of ship of the present invention;

Fig. 2 is a schematic diagram of the basic structure of a retractable bilge keel of a ship of the present invention;

Fig. 3 is a schematic diagram of the basic structure of a retractable bilge keel of a ship of the present invention;

Fig. 4 is a structural schematic diagram of a retractable bilge keel of a ship according to the present invention;

Fig. 5 is a structural schematic view of the retractable bilge keel of a ship of the present invention in the working process

Fig. 6 is a fully unfolded structure schematic diagram of a retractable bilge keel sub-plate of a ship according to the present invention;

Figures 7a, 7b, and 7c are three views of a ship retractable bilge keel hydraulic rod structure according to the present invention;

Figures 8a, 8b, and 8c are three views of a double-headed hydraulic push rod structure of a ship's retractable bilge keel according to the present invention;

Fig. 9 is a schematic diagram of partial dissection of the retractable bilge keel guide rail of a ship of the present invention;

In the figure: 1. Main board of bilge keel, 2. Retractable sub-board, 3. Traveling guide rail, 4. Double-headed hydraulic push rod, 5. Pressure rod driving device, 6. Hull, 7. Hydraulic rod, 8. Driving guide rail .

detailed description

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

Referring to Fig. 1 to Fig. 9, the present invention is a ship retractable bilge keel device using guide rails, which is mainly used for various ships and suitable for suppressing roll under various complicated working conditions. A retractable bilge keel of a ship provided by the present invention has a basic structural diagram as shown in Figure 1. The device is composed of a retractable bilge keel and a pressure rod driving device; wherein, the retractable bilge keel The keel is mainly composed of bilge keel main board 1, retractable sub-board 2, traveling guide rail 3, and hydraulic retractable mechanism; the pressure rod driving device 5 is mainly composed of hydraulic push rod 7 and driving guide rail 8.

The bilge keel main board 1 is welded to the hull 6, and the bilge keel main board 1 and the retractable sub-board 2 are connected through nested traveling guide rails 3, that is, the retractable sub-board and the bilge keel main board are connected in the form of linear sliding guide rails. The retractable form between the main board of the bilge keel and the retractable sub-board is mainly completed by sliding using the guide rail structure, and the retractable sub-board 2 is hinged with the hydraulic retractable mechanism 4 . The hydraulic retractable mechanism uses a double-head hydraulic push rod 4, so that the retractable sub-plate can obtain more strokes on the slide rail. The retractable sub-board 2 can be partially or completely slid out of the main board along the guide rails by the double-headed hydraulic push rod 4 to achieve different anti-rolling effects. The pressure rod driving device is mainly composed of a hydraulic rod and a driving guide rail, and is welded on the hull 6, placed along the bilge molding line, that is, the pressure rod driving device is placed in the hull bilge molding line, welded with the hull, and the pressure rod driving device The rod end of the hydraulic rod slides in the driving guide rail, and the driving guide rail supports the rod end of the hydraulic rod at the same time, and the rod end of the hydraulic rod is hinged with the hydraulic retractable mechanism. Specifically: the rod end of the hydraulic rod 7 is a hinged structure, which is hinged with the double-head hydraulic push rod 4. The rod end of the hydraulic rod 7 moves up and down along the driving guide rail 8, and the driving guide rail 8 supports the hydraulic rod rod end simultaneously.

Both the traveling guide rail 3 and the driving guide rail 8 adopt a corrosion-resistant structure. The hinged structure of the rod end of the double-headed hydraulic push rod 4 is shown in Figures 8a-8c, and the hinged structure of the rod end of the hydraulic rod 7 is shown in Figures 7a-7c. The partial anatomical structure of the traveling guide rail 3 is shown in Fig. 9 .

The double-head hydraulic push rod 4, the bilge keel main board 1, and the retractable sub-board 2 can all form a Y-shaped structure during the retractable period, and can produce a stable triangular structure with the hull 6 to provide certain strength support for the entire device.

When the navigating sea conditions are bad or there is a high demand for stability, the bilge keel sub-plate can be fully or partially released according to the demand, so as to reduce the roll, enhance the stability, and transfer from the stowed state (Fig. 4) to the unfolded state ( Fig. 6); When facing the situation of small wind and waves or docking at the port, the sub-plate of the bilge keel is retracted to prevent bottoming out, collision, etc., and the unfolded state (Fig. 6) is changed to the stowed state (Fig. 4). Taking the retractable auxiliary board as an example, the working process of the retractable bilge keel device of the present invention is as follows:

1. Initially, the auxiliary board is in the retracted state, as shown in Figure 4. The hydraulic rod 7 starts to work and retracts its push rod, and the end of the push rod descends along the driving guide rail 8. At the same time, the double-head hydraulic push rod 4 works to shorten the length of the double-head hydraulic push rod 4. At this time, the sub-plate is kept on the traveling guide rail Do not move.

2. The rod end of the hydraulic rod 7 is retracted to its bottom, and at this time, the rod end of the double-headed hydraulic push rod 4 is retracted to the inside, and its length reaches the shortest. The double-headed hydraulic push rod 4 is approximately parallel to the retractable sub-plate 2 and the travel guide rail 3, and the state at this time is shown in Figure 5. Then the double-headed hydraulic push rod 4 works, releases the double rod, and simultaneously promotes the retractable sub-board 2 to stretch out the bilge keel main board 1 along the traveling guide rail 3 .

3. The double-headed hydraulic push rod 4 continues to work. According to the control signal, the retractable sub-board 2 is completely or partially pushed out of the main board within the safety allowable range to achieve the anti-rolling effect. Afterwards, the hydraulic rod 7 can lift its rod end as required. So that the hydraulic rod 7, the hull 6, the double-head hydraulic push rod 4, the main board 1, and the retractable sub-board 2 can travel to a stable structure with sufficient strength, as shown in Fig. 1 and Fig. 6 .

When the present invention is in anti-rolling operation, according to the expected anti-rolling effect, the pressure bar driving device and the hydraulic retractable mechanism work together to partially or completely push out the bilge keel sub-plate to realize the optimization of the anti-rolling effect of the ship. The retractable bilge keel device in the present invention can change the length of the bilge keel and the area of the bilge keel to obtain different anti-rolling effects. The structure of the device is simple, the anti-rolling efficiency is high, and the bilge keel can be retracted freely. In particular, the size of the bilge keel is not limited, and its width can exceed the maximum frame line of the hull cross section, and the anti-rolling effect is better. When the sea conditions are good or when docking near the port, the retractable bilge keel sub-plate can be retracted to reduce the navigation resistance of the ship and avoid damage to the hull; the device has a simple construction process and is suitable for the bilge of various ships.

Claims (2)

1. a kind of use guide rail ship extendible bilge keelson device it is characterised in that：Bilge keelson mainboard, bilge are welded with hull Traveling guide rail is provided with Os Draconis mainboard, extendible subplate is installed in traveling guide rail, the centre position of extendible subplate with double One end of head hydraulic push rod is hinged, and the hull turn of the bilge is provided with driving guide rail, drives in guide rail and is provided with hydraulic stem, hydraulic stem Boom end hinged with the other end of double end hydraulic push rod.

2. a kind of use guide rail according to claim 1 ship extendible bilge keelson device it is characterised in that：Traveling is led Rail and driving guide rail are all corrosion resistance structures.