CN105216983A - Dive in water, liquid level solidification equipment in buoyancy aid cabin - Google Patents

Abstract

The invention relates to the technical field of free liquid surface solidification in underwater diving and floating body cabins, in particular to a liquid surface curing device in underwater diving and floating body cabins. It includes a hydraulic cylinder, a rigid cover plate, and a guide column. The rigid cover plate is rectangular, with sleeves at the four corners. The upper end of the rigid cover plate is provided with a “day”-shaped rigid frame. Connected with the middle part of the rigid frame, there are four guide columns, which correspond to the sleeves on the rigid cover plate and are socketed in the sleeves. The present invention greatly improves the initial stability and large-inclination stability of ships and the like under the action of no free water surface, and greatly improves the stability and safety of sinking and floating tanks, etc. The present invention has simple structure, strong practicability and wide application market prospects.

Description

Liquid surface curing device in underwater diving and floating body cabin

technical field

The invention relates to the technical field of free liquid surface solidification in underwater diving and floating body cabins, in particular to a liquid surface curing device in underwater diving and floating body cabins.

Background technique

The large sloshing problem of fluid with a free liquid surface is a very important mechanical problem in ocean transportation, aviation engineering, petrochemical industry and nuclear reactor structure engineering, and the safety problems caused by the large sloshing of the liquid surface are not uncommon.

Stability is one of the main performance indicators to ensure the safe navigation and operation of various offshore floating bodies. At present, all countries in the world have formulated corresponding specifications as the main basis for judging stability during ship design or navigation. The free surface has an important influence on the stability of diving and floating bodies. In recent years, ship capsizing accidents caused by various natural and man-made reasons are common. Among these accidents, many of them are related to the lack of stability of the ship caused by the free liquid surface. For example, in the "11.24" catastrophe that shocked the whole country in 1999, the "Dashun" ship sank in the wind and waves, and 282 of the 304 passengers died. It has a lot to do with it, not only that, when the free surface fluid sloshes, the impact will have a destructive effect on the tank boundary of the ship.

Contents of the invention

The technical problem to be solved by the present invention is how to overcome the deficiencies of the prior art and provide a device for solidifying the liquid surface in the submersible and floating tanks.

The technical solution adopted by the present invention for achieving the above object is: submersible in water, liquid surface solidification device in the floating body cabin, including hydraulic cylinder, rigid cover plate, guide column, said rigid cover plate is rectangular, four corners are provided with sleeves, said The upper end of the rigid cover is provided with a "day"-shaped rigid frame, the hydraulic cylinder is connected with the middle part of the rigid frame through a column hinge, and there are four guide columns, which are connected with the Corresponding to the sleeve, it is sleeved in the sleeve.

Further: the stroke length of the hydraulic cylinder is 3000-4000mm.

Further: the thickness of the rigid cover plate is 3-5 mm.

Further: the inner diameter of the sleeve is 140-150 mm.

The present invention has the advantages of greatly improving the initial stability and large dip angle stability of ships and the like under the action of no free water surface, and greatly improving the stability and safety of caissons and the like. The present invention is simple in structure, strong in practicability, and has the advantages of Broad market prospects.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the present invention.

detailed description

The liquid level curing device in the underwater diving and floating body cabin includes a hydraulic cylinder 1, a rigid cover plate 2, and a guide column 3. The rigid cover plate 2 is rectangular, and sleeves 21 are arranged at the four corners. The upper end of the rigid cover plate 2 is provided with There is a "day"-shaped rigid frame 22, the hydraulic cylinder 1 is connected to the middle part of the rigid frame 22 through a column hinge, and there are four guide columns 3, which are connected with the sleeve on the rigid cover plate Correspondingly, the cylinder 21 is sleeved in the sleeve 21 .

The stroke length of the hydraulic cylinder 1 is 3500mm, the thickness of the rigid cover plate 2 is 3mm, and the inner diameter of the sleeve 21 is 150mm.

The present invention carries out design and addition in the process of design and manufacture of submarines, ships, caissons and the like. Submarines and ships are equipped with the present invention in main ballast water tanks, trim adjustment water tanks, fresh water tanks, and fuel oil tanks. For caissons, the sleeves of the present invention are pre-embedded before the caisson is made and poured. , after adding ballast water, finish installing the present invention, carry out floating transport then. In the present invention, the liquid level is controlled correspondingly through the hydraulic system of the hydraulic cylinder 1 .

The following is calculated with the caisson example:

The buoyant stability of the caisson is deduced according to the classical formula of statics. "Code for Design and Construction of Gravity Wharf" (JTS167-2-2009) stipulates that the buoyant stability of caissons is expressed by the fixed inclination height m. which is

m=ρ-a

In the formula:

ρ—radius of constant inclination;

a—the distance from the center of gravity of the caisson to the center of buoyancy.

The above formula is the inclination height of the small-angle swing of the caisson in the initial horizontal floating state, which means the initial stability of the caisson floating. The initial stability assumed by the small inclination angle is only a sufficient condition for the stability of the caisson, but not a necessary condition. A caisson is different from a ship in that it is not necessary to ensure its initial stability in a horizontal state. In general, even if a caisson loses its initial stability in a horizontal state, it can still maintain its buoyant stability in an inclined state.

The practice of floating caissons has proved that due to the variability of sea wind and waves, the existence of cable dragging moment, the inaccuracy of ballast or the leakage of compartments, caissons are often floated in a slightly inclined or highly inclined state. In addition, with the appearance of large caissons of various shapes, the buoyancy stability of caissons is difficult to be satisfied. The safety of the caisson is ensured by the method of capping and horizontal transportation, and the floating state of this kind of inclined floating transportation generally needs to be obtained through model tests.

The floating stability of the caisson can be improved simply and effectively by solidifying the free liquid surface. The specific data of the caisson are calculated as follows:

The caisson is 21.4m long, 11.4m wide and 19m high. There is one longitudinal partition wall and four transverse partition walls inside the caisson. The wall thickness of the caisson is 0.35m, the thickness of the partition wall is 0.2m, and the thickness of the bottom plate is 1m. In the case of pressurized cabin water 2m:

Center of gravity height:

${\mathrm{<span\; class="notranslate">\; the\; y</span>}}_{\mathrm{<span\; class="notranslate">\; c</span>}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 157368.79</span>}}{\mathrm{<span\; class="notranslate">\; 23669.86</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 6.65</span>}\mathrm{<span\; class="notranslate">\; m</span>}$

Total Drainage Volume:

$\mathrm{<span\; class="notranslate">\; V</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 23669.86</span>}}{\mathrm{<span\; class="notranslate">\; 10.25</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 2309.25</span>}{\mathrm{<span\; class="notranslate">\; m</span>}}^{\mathrm{<span\; class="notranslate">\; 3</span>}}$

Front and rear toe drainage volume:

v ₁ =26.78m ³

Caisson draft:

Height of center of buoyancy of caisson:

${\mathrm{<span\; class="notranslate">\; the\; y</span>}}_{\mathrm{<span\; class="notranslate">\; w</span>}}<span\; class="notranslate">\; =</span>\frac{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; V</span>}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; v</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; )</span>\frac{\mathrm{<span\; class="notranslate">\; T</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; v</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}{\mathrm{<span\; class="notranslate">\; V</span>}}<span\; class="notranslate">\; =</span>\frac{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2309.25</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 26.78</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&times;</span>\frac{\mathrm{<span\; class="notranslate">\; 11.79</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 26.78</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; 0.33</span>}}{\mathrm{<span\; class="notranslate">\; 2309.25</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 5.83</span>}\mathrm{<span\; class="notranslate">\; m</span>}$

Distance from center of gravity to center of buoyancy:

a=yc-yw= _6.65-5.83 = _0.82m

Fixed inclination radius:

$\mathrm{<span\; class="notranslate">\; \&rho;</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; I</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}\mathrm{<span\; class="notranslate">\; i</span>}}{\mathrm{<span\; class="notranslate">\; V</span>}}<span\; class="notranslate">\; =</span>\frac{\frac{\mathrm{<span\; class="notranslate">\; 20.6</span>}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; 11.4</span>}}^{\mathrm{<span\; class="notranslate">\; 3</span>}}}{\mathrm{<span\; class="notranslate">\; 12</span>}}<span\; class="notranslate">\; -</span>\frac{\mathrm{<span\; class="notranslate">\; 8</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; 4.625</span>}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; 4.05</span>}}^{\mathrm{<span\; class="notranslate">\; 3</span>}}}{\mathrm{<span\; class="notranslate">\; 12</span>}}}{\mathrm{<span\; class="notranslate">\; 1985.56</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1.18</span>}\mathrm{<span\; class="notranslate">\; m</span>}$

Fixed tilt height:

m=ρ-a=1.18-0.82=0.36m<0.4m

The fixed tilt height does not meet the requirements.

When the solidified free surface technology is used, the effect of the free surface disappears. The relevant calculations are as follows:

Fixed inclination radius:

$\mathrm{<span\; class="notranslate">\; \&rho;</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}\mathrm{<span\; class="notranslate">\; i</span>}}{\mathrm{<span\; class="notranslate">\; V</span>}}<span\; class="notranslate">\; =</span>\frac{\frac{\mathrm{<span\; class="notranslate">\; 20.6</span>}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; 11.4</span>}}^{\mathrm{<span\; class="notranslate">\; 3</span>}}}{\mathrm{<span\; class="notranslate">\; 12</span>}}}{\mathrm{<span\; class="notranslate">\; 1985.56</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1.28</span>}\mathrm{<span\; class="notranslate">\; m</span>}$

Fixed tilt height:

m=ρ-a=1.28-0.82=0.46m>0.4m

The fixed tilt height meets the requirements.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and its purpose is to enable those of ordinary skill in the art to understand the content of the present invention and implement it accordingly, and cannot limit the protection scope of the present invention. All equivalent changes or modifications made according to the essence of the present invention shall fall within the protection scope of the present invention.

Claims (4)

1. The liquid level solidifying device in the underwater diving and floating body cabin is characterized in that: it includes a hydraulic cylinder, a rigid cover plate, and a guide column. The rigid cover plate is rectangular in shape, and sleeves are provided at the four corners. There is a "day"-shaped rigid frame, the hydraulic cylinder is connected to the middle part of the rigid frame through a column hinge, and there are four guide posts corresponding to the sleeves on the rigid cover plate. into the sleeve. 2 . The device for solidifying the liquid surface in underwater submersible and floating body cabins according to claim 1 , wherein the stroke length of the hydraulic cylinder is 3000-4000 mm. 3 . The device for solidifying the liquid surface in underwater submersible and floating body cabins according to claim 1 , wherein the rigid cover plate has a thickness of 3-5 mm. 4 . 4. The device for solidifying the liquid surface in underwater submersible and floating body tanks according to claim 1, characterized in that: the inner diameter of the sleeve is 140-150 mm.