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Marine Airbag

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Ship launching or upgrading relying on air-bags is an innovative technology having promising prospect in shipbuilding. It overcomes the shortcomings of the fixed launching track, which limits the productive capability of the small and medium sized shipyards. Now it has become a Flexible Launching Technology, having the merits of time and labor saving, flexibility, reliability and safety in operation and comprehensive economic benefits etc.

The air bag consists of an air bag’s body and ends of iron pieces.The wall of air bag consists of  rubber layer and curtain cloth layer after the process of forming and vulcanization. At both ends of the air bag,there are two air bag mouths  through which air can be pumped into or released from the air bag. The air bag mouths are made of metal materials and are closely combined with the body of the air bag into one.

Specifications

Air bag models / specifications

model
Specification(D×L)
application
QP3ordinaryreinforced 3-layer air bag
Diameter of an ir bag’s body(D) 0.8m,1.0m,1.2m,1.5m,1.8m,etc.Length of an air bag’s body(L)ranging from 5m to 18m.according to the requirements of customers
For Small and medium-sized ship up to or down to launching way and moving objects
QP4ordinary reinforced 4-layer air bag
For the larger ship up to or down to launching way and moving objects
QP5 ordinary reinforced 5-layer air bag
For large and medium-sized ship up to or down to launching way and moving objects
QG6reinforced 6-layer air bag with a high bearing capacity
For large ships up to or down to launching way and supporting the key parts during operation

Parameters and performance of the air bag

model
 
Diameter
m
 
Initial pressure
kPa
 
Rated working pressure,Pe
kPa
 
A deformation rate of 70%, internal pressure equivalent to the rated pressure value of Pe, the airbag bearing capacity of the length of each meter. kN/m
Minimum burst pressure
kPa
 
QP3
 
0.8
25
130
114
390
1.0
18
100
110
300
1.2
15
85
112
260
1.5
13
70
115
210
QP4
1.8
35
170
149
510
1.0
25
130
143
390
1.2
20
110
145
330
1.5
16
90
148
270
1.8
14
80
158
240
QP5
0.8
48
210
184
630
1.0
35
170
186
510
1.2
28
140
185
420
1.5
20
110
181
330
1.8
16
90
178
270
QG6
1.0
45
200
219
600
1.2
32
165
217
490
1.5
25
130
215
390
1.8
20
110
218
330

 

Drawings

  • Click to enlarge the drawing
    Figure 1
    1– mouth of an air bag;
    2–head of an air bag;
    3– body of an air bag (D-diameter, L-length of an air bag’s body, LoA-total length of an air bag)
    Figure 1
    1– mouth of an air bag;
    2–head of an air bag;
    3– body of an air bag (D-diameter, L-length of an air bag’s body, LoA-total length of an air bag)
  • Click to enlarge the drawing
    Figure 2a
    1 - sealed plug of an air bag’s mouth;
    2 - the end of the iron pieces (anti-explosion)
    Figure 2a
    1 - sealed plug of an air bag’s mouth;
    2 - the end of the iron pieces (anti-explosion)
  • Click to enlarge the drawing
    Figure 2b 1 - the end of iron pieces (anti-explosion);
    2 – three-way connecting pipe;
    3 - built-in (sea water resistant) pressure gauge;
    4 - valve;
    5 - hose connector
    Figure 2b 1 - the end of iron pieces (anti-explosion);
    2 – three-way connecting pipe;
    3 - built-in (sea water resistant) pressure gauge;
    4 - valve;
    5 - hose connector







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