Floating Inflatable Rubber Used Marine Airbag for ship launching or upgrading
Marine Airbag description
Ship launching rubber marine airbags technique was found to be versatile and flexible in marine engineering fields. Rubber Airbags can lift up heavy like jacks and move it forward,act as pneumatic rollers. Airbags can roll over pits and knuckles, so they have less demands of the ground or ramp. Different from rigid trolleys, launching airbags can be compressed at different ratio, thus they can absorb the impact energy emerges in some structure launching projects.
Marine Airbag Application
Marine airbags are widely used for ship launching, heavy transportation and marine salvage nowadays. Marine airbags are often called ship launching airbags that indicate the most popular application of these heavy duty airbags is for ship launching. It is estimated that more than 80 percent new built ships who’s DWT below 60,000 are launched by marine airbags.
The structure of Marine Airbag
The structure Nanhai No. 1 Marine airbag for ship is shown in Fig. 4. It consists of a bag body and end-iron component. The bag body is made from vulcanization of base rubber and reinforced fiber material. The end-iron component is made of metal materials and connected to the bag body firmly.
Major Strengths of Marine Airbag:
1.High safety level: equipped with a reliable safety valve, our airbags can stand the maximum pressure up to 4 times that of the operating pressure.
2.Good air tightness: pressure decreases less than 10% for a period of 24 hours.
3.Long lifespan: it is guaranteed that our airbags can sustain their designed operating pressure for 3 years.
4.A complete set of solutions is available.
Marine Airbag Specifications:
|
Diameter |
Layer |
Work pressure |
Diameter |
Layer |
Work pressure |
|
D=0.8M |
3 |
0.13 Mpa |
D=1.5M |
3 |
0.07 Mpa |
|
4 |
0.17 Mpa |
4 |
0.09 Mpa |
||
|
5 |
0.21 Mpa |
5 |
0.11 Mpa |
||
|
6 |
0.25 Mpa |
6 |
0.13 Mpa |
||
|
7 |
0.30 Mpa |
7 |
0.15 Mpa |
||
|
8 |
0.33 Mpa |
8 |
0.18 Mpa |
||
|
D=1.0M |
3 |
0.10 Mpa |
D=1.8M |
3 |
0.06 Mpa |
|
4 |
0.13 Mpa |
4 |
0.08 Mpa |
||
|
5 |
0.17 Mpa |
5 |
0.09 Mpa |
||
|
6 |
0.20 Mpa |
6 |
0.11 Mpa |
||
|
7 |
0.25 Mpa |
7 |
0.13 Mpa |
||
|
8 |
0.28 Mpa |
8 |
0.15 Mpa |
||
|
D=1.2M |
3 |
0.09 Mpa |
D=2.0M |
3 |
0.05 Mpa |
|
4 |
0.11 Mpa |
4 |
0.07 Mpa |
||
|
5 |
0.14 Mpa |
5 |
0.08 Mpa |
||
|
6 |
0.17 Mpa |
6 |
0.10 Mpa |
||
|
7 |
0.20 Mpa |
7 |
0.12 Mpa |
||
|
8 |
0.23 Mpa |
8 |
0.14 Mpa |
The Selection of ship launching and landing rubber airbag
Diameter: General speaking, the diameter of airbags for ship used is Dia1.5m. If the piers’ height is a little higher, we could choose the larger diameter airbags, such like Dia1.8m or Dia2.0m; and for the Dia1.0m or Dia1.2m airbags are suitable for some smaller sized ships.
Length of Effective (Le): The Le of airbags is the length of airbag’s cylinder part, and does not include the length of head vertebral body.
(1) Ship width≤20m: In theoretical, Le of airbags= Ship width (B); and if the length of airbags could not feet the ship width, airbags could be put under ships for two rows.
(2) Ship width>20m: Generally speaking, airbags will be put under ship as two rows, as butt arrangement or cross arrangement.
Operating Pressure of Airbags: Less than DWT 1,000 could choose S1 Category Airbags; Larger than DWT 1,000 could choose S2 Category Airbags; S3 Category Airbags are used for the special higher working pressure requirement situation.
NO.s of Airbags (N): The numbers of airbags required is decided by the length of ships/vessels, and N is equal to the NO.s of putting under ship body (N1) plus the spare ones (N2), which is formula: N1+N2=N (N1 stands for the pieces under ships, N2 stands for the pieces of spares). The main factors to decide numbers of airbags required is ship DWT and category of airbags. (NOTE: N1=DWT / (Bearing Capacity of Unit for airbags×Le), spare airbags are decided by the fact situation.
Our Marine Airbag
Founded in 2003, Nanhai Airbag is a full-service provider of airbags and pneumatic fenders, covering R&D, manufacture and distribution. Our airbag products are used for ship launching, buoyancy, and heavy lifting and moving with remarkable advantages over traditional steel-based methods.
