Link pontoon-bridge park

 

(57) Abstract:

The invention relates to a bridge-building technique and can be used when aiming for the floating bridges on water obstacles with a very rapid current, and with the passage of the waves break. The invention consists in that link pontoon - bridge Park, including four folding pontoon, equipped with a hydrodynamic device in the form of a soft cloth, which is installed under the bottom and rim of extreme pontoon from the lower side of the link, and a soft cloth made of length equal to the length of the link and of a width greater than the length of the extreme perimeter of the pontoon, while the cloth is attached to one edge of the horse side to the extreme bottom of the pontoon. 3 Il.

The invention relates to a bridge-building technique and can be used for equipment crossings, in particular when aiming for the floating bridges on water obstacles with a very rapid current, and with the passage of the waves break, resulting in the destruction of the constructions of dams and flood waves and floods.

Equipment and maintenance of river crossings at high velocity, using existing crossing means is difficult, and in many cases iskluchenie often do not give the desired effect.

You know the link pontoon-bridge Park, which includes four folding pontoon two medium and two extreme [1]

The closest in technical essence and the achieved result to the invention is link pontoon-bridge Park, including two medium, two extreme pontoon and hydrodynamic device [2] At the pontoons link is made with lines.

The disadvantage of this link is that it is unstable operates at high speed currents in excess of 3 m/s, when there is a significant trim level, as applied at the level of the hydrodynamic device is partially aligns the flow of water flowing round the bottom level, and to some extent protects light deck at the pontoon from the overflow of water, but does not eliminate the cause, calling the pitch link. Therefore, the pitch of the link caused by reducing the pressure under his bottom due to the high velocity, leads to the loss of stability of the link, which eliminates the possibility of using floating bridges, leads to delay troops when fording. In addition, when the change in velocity required to adjust the tilt angle of the hydrodynamic shields that are difficult to perform in terms of what oresti current time.

Object of the invention is the improvement of the link pontoon-bridge Park, providing on-the-water obstacles at high flow rate.

This object is achieved by increasing the hydrodynamic resistance level due to equipment hydrodynamic device in the form of a soft cloth that is installed from the lower side of the link on the bottom link under the extreme perimeter of the pontoon.

When the link in the flow of water observed increase in the velocity and displacement of fluid flow on the extreme perimeter of the pontoon, which leads to uneven pressure distribution on the bottom and the extreme perimeter of the pontoon and the offset of the point of application ravetastic forces, resulting in krenawi time and formed the pitch link. Mounted on the link soft cloth acting as a flow conditioner, contributes to the shift of the separation point of the flow, located in front of the extreme perimeter of the pontoon, at the end of a soft cloth and smoothing the velocity of stream flow over the link. As a consequence, the stability of podmostovoe flow in the border layer on the entire length of the bottom and a soft cloth, which eliminates ke selects the flow of kinetic energy, which goes to work on his swing, because this is not observed the increase of the flow velocity at the extreme bottom of the pontoon, which further increases the flow stabilization. As a result of these factors, the rate in the border layer on the bottom and the extreme perimeter of the pontoon is aligned, as a consequence, a uniform distribution of pressure under the bottom of the link. This increases the vertical component of the hydrodynamic forces, reduces the holding time, which leads to the reduction of trim level, which increases the stability of the link in the thread, improves performance and allows the use of managers in a wide range of change of velocity.

In Fig. 1 shows a General view of the link fortified with a soft cloth; Fig. 2 link pontoon-bridge Park from the bottom of Fig.3 fastening elements with a soft cloth in the extreme pontoon.

Link pontoon-bridge Park includes two medium 1 and two at 2 pontoon with lines 3, bottom 4 and the roadway 5. Under the bottom 4 and the rim 3 at 2 pontoon from the lower side of the link is established hydrodynamic device in the form of soft cloth 6, which is made of length equal to the longitudinal rotary plates 7 and lock 8. To facilitate installation of the cloth 6 on the link plate 7 are cut into several pieces.

Works link as follows.

Before tip-off of a bridge (not shown) on the water hazard with a high rate of flow or in the period of breaking waves on a link is established hydrodynamic unit with a soft cloth. After reset link with a transport vehicle (not shown) it goes into operating position. In the operation of the bridge on the water hazard with a high velocity flow over a link in the thread, getting from the bottom extreme of the pontoon on a soft cloth, continues its movement without separation of particles on the extreme perimeter of the pontoon, as a consequence, the speed of the pontoon on the extreme perimeter of the pontoon is not increased, thereby increasing pressure on the extreme perimeter of the pontoon and lower granadero moment, leading to the trim level. Therefore, the trim level is significantly reduced, which ensures its stable operation in the stream. In addition, some of the kinetic energy of the flow is lost to the fluctuation of the cloth, which also reduces the rate of flow and eliminates the pressure drop on the bottom and the extreme contours of the pontoon.

Link Ponton the e device characterized in that the hydrodynamic device made in the form of soft cloth, placed under the bottom and rim of extreme pontoon from the lower side of the link, with a soft cloth made of length equal to the length of the link, and a width, the greater the length of the extreme perimeter of the pontoon, with the cloth attached at one end to the extreme bottom of the pontoon by means of plates and castles.

 

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