Vessel Lauching Air Bags
Vessel Lauching Air Bags
Vessel Lauching Air Bags
Email: sales@boomarine.com
Web.: www.boomarine.com
INTRODUCTION
Airbag for ship launching and landing is an extremely promising mature technology, it overcomes restrictions of traditional methods, which limited by
the building and repairing capability of small ship factories, and developed in to an extremely flexible technology, which have the advantage of
labor-saving, time-saving, economical saving, flexible and a prominent economic benefit. Our airbag widely used in ship launching or landing, heavy
lifting and conveying, sunken ship salvage and stranded ship saving.
Application
Features -ship launching and landing
- labor-saving, time-saving, economical saving, -heavy lifting and conveying
- flexible and a prominent economic benefit. - sunken ship salvage and stranded ship saving
STRUCTURE
1. Air-bag skeleton material is nylon-6 dipped tire cord fabric. Density of nylon-6 dipped tire cord fabric ≥90 piece /10cm breaking strength of nylon.
Tire cord≥313KN/piece
2. Air inlet is a metal casting
3. Processing method: integrative twine technology
1. End ironworks
2. Cylindrical bag body
3. Cone shaped bag body
Medium pressure 4-5 6-7 ≤5% Suitable for the small ships
Air-bag (P4, P5)
High pressure 6,7,8 8-9 ≤4% Suitable for the large ships
Air-bag (P6, P7,P8)
PERFORMANCE PARAMETERS
type Dia. (m) Initial Internal Rated Working Bearing capacity per meter in length when Minimum Burst
Pressure Kpa Pressure Kpa 70% deformation and the inner pressure Pressure Kpa
reaches the rated working pressure Kn/M
1. If the air bag will not be used for quite a long time, it shall washed
and dried, filled with French chalk inside and coated with French
chalk outside as well as put in dry, shady and ventilated place in
the room.
2. Place storing the air bag shall be far away from the heat source.
3. The air bag can’t be stretched flat when not used. It’s not allowed
to pile up and stack heavy
4. The air bag should be far away from oil, acid, alkali, and other
organic solvent
The product is up to the quality requirements of GB/T3795-1996 “air bags for the up-to-slipway and launching of the ship”.
Should quality problem happen within a year, it is guaranteed to change or refund on the condition that the transportation, storage, and working
conditions are up to the regulations.
REPAIRING GUIDANCE
If the air bag is damaged, it can be repaired as long as the rubber does
not age seriously (without crack and stickiness on the surface) and
the cord fabric is not loose and rotten. Repair can be made by
hot vulcanization and auto-vulcanization. The tool and repair
material utilized in the former are quote easy. the hot vulcanization
is recommended to user and the introduction is as follows:
1. Wash the air bag to make sure it is clean both inside and outside,
then dry the surface.
Notes: the immersion time while washing can’t be more than 10 minutes.
2. Mark the repair symbol visibly. Mark out the repair area and the mark area
is allowed to expand 15mm. Don’t omit the concealed damage.
3. Manufacturing backing
The material of backing is the same as the airbag and the
arrangement angle of the cord fabric is consistent with the air bag.
The first layer of the backing is a vertical line. Length x 2
The second layer of the backing is oblique line whose angle is opposite to and crossed with the second layer. It is 20mm larger than the periphery of
the second layer. The fourth, fifth, and sixth layer may be deduced by analog. The fillet transition with the radius of 40-50mm is required for the backing
periphery of every layer.If the fault is a nail hole within 100mm or scar of 50-700mm, cross backing shall be prepared. Nylon cross backing is made by
gluing two layers of coated nylon with the cross of 90 degree. Its size is 200x200mm and others are the same as the backing.
6. Viscose
Firstly, brush a layer of base glue with the thickness of 1±0.2mm on the periphery of the fault. Cool down till not gluing hand. Paste and press and
the glue should not be too tight in case glue failure happens after the new glue contact. The paste the backing. The center of the backing shall be
pointed at fault center. The angle of the backing shall be in consistent with the thylakoid line layer. For crack larger than 1m, a layer of coated cord
fabric shall be pasted I n the fault to cover the 25m fault, and then paste the fill pad. In the end, cross paste the sealing glue with the thickness of
0.8-1mm to the junction between the backing edge and thylakoid.
7. Vulcanization
For normal shipbuilding, the following simple method can be adopted. Set up a frame (as shown in the figure) and provide plate, sand bag, jack and
heated plate. Jack bag to be repaired shall be pointed ate the center in accordance with the position shown in the figure. First vulcanize the hold
and then the scar. If the large fault to be vulcanized exceeds the effective length of the vulcanization, the center shall be vulcanized first and then
re-vulcanization. The vulcanization shall be finished within 40-50 minutes when the temperature rises to 135±5℃ and the pressure is 0.8-0.12Mpa.
8. Check whether the repair is bound tightly. Faults such as void, delaminating or sponge and so on are not allowed. Charge test will be conducted if
the repair is qualified.
1. Jack
2. Plancon
3. Heated steel plate
4. Pad cloth
5. Air bag
6. Sand bag
7. Iron plate
8. Frame