Do you know the classification of life jackets?

Life jacket (a life jacket), also known as life vest, is a life-saving garment designed like a vest, made of nylon fabric or neoprene (NEOPRENE), buoyancy material or inflatable material, reflective material, etc. The general service life is 5-7 years, and it is one of the life-saving equipment on ships and aircrafts. Generally vest style, made of foam plastic or cork, etc. It has enough buoyancy to be worn on the body, so that the head of the person who falls can get out of the water.

The life jacket can be subdivided as follows:

Boat

1. Marine Lifejacket, (Marine Child Lifejacket), suitable for the life-saving use of all kinds of people on the ocean coast and inland rivers . Life jacket buoyancy material: polyethylene foam. The new marine life jacket is a new life jacket designed and manufactured according to the requirements of IMO MSC207 (81) and MSC200 (80). The specification was implemented on July 1, 2010.

2. Marine work life jacket (Marine work Lifejacket), suitable for all kinds of people working along the coast and inland rivers. The life jacket buoyancy is greater than 75N. After the life jacket is immersed in water for 24 hours, the life jacket buoyancy loss should be less than 5%.

3. Leisure life jackets: Some are also called water sports life jackets (Water Sports Lifejacket). The fabric is mostly made of neoprene composite materials, with a variety of colors and fashions. It is mainly suitable for life-saving protection such as playing in water, learning to swim, rafting, fishing, etc.

Sea use

Generally used are marine life jackets. The inside is made of EVA foam material, after compression 3D three-dimensional molding, its thickness is about 4 cm (domestic production is 5-6 thin hair materials, about 5-7 cm thick). Lifejackets manufactured according to standard specifications all have their buoyancy standards: generally 7.5 kg / 24 hours for adults and 5 kg / 24 hours for children, so as to ensure that the chest is above the bu surface.

How to use: Put the life jacket whistle bag outwards on your body; pull the zipper, tighten the front collar straps with both hands, and tie the neck straps; the award straps are cross-bound tightly on the front body; after wearing, check each place for binding prison. Use color: bright colors in life jackets or colors with fluorescent components will stimulate the optic nerve. It may be related to the wavelength of this color, which is easily accepted by human eyes and not easily confused by other colors. This will be more conspicuous. In this way, in the event of an accident wearing a life jacket, it is easy to be discovered and rescue can be carried out as soon as possible.

Aviation

Inflatable life jacket is to pull the pull cord on the inflating device to make the pull rod turn to not less than 90 degrees, the puncture needle pierces the diaphragm in the high-pressure gas storage cylinder (disposable, replaceable), high-pressure carbon dioxide gas rushes into the air bag, and the gas expands Afterwards, buoyancy is generated to achieve the purpose of life saving.

Inflatable life jackets are mainly composed of sealed inflatable vest airbags, miniature high-pressure gas cylinders and rapid inflation valves, etc., and are often used in work that may fall into the water. Under normal circumstances (uninflated), the entire inflatable life jacket is worn like a belt and hung on the shoulders of the person. Due to its small size, it does not hinder people's freedom of operation; once it falls into the water, it needs to be buoyant when encountered in the water. In an emergency, you can automatically inflate and inflate according to the action of water (fully inflated life jacket), or pull the cable on the inflation valve by hand (manually inflated life jacket), and the inflation will be completed within 5 seconds, resulting in 8 to 15 kg of buoyancy, upward Hold up the human body to expose the head and shoulders of the person who accidentally fell into the water, and obtain safety protection in time.

Neck-mounted

Before inflation, it is like wearing a vest. When the water falls or is in danger in the water, pull the manual valve and quickly inflate in 5 seconds. The human body is floated to the surface to achieve lifesaving. There is a mouthpiece on the life jacket, you can also blow. When in distress, pull open the manual valve, fill the life jacket with high-pressure gas from the cylinder. The front chest and back of the vest inflate rapidly to form an airbag, which can generate 10 kg of buoyancy in the water to float the human body on the water.

Waist-mounted

During leisure, a webbing strap is fixed around the waist. After inadvertently falling into the water, it inflates to form a horseshoe-shaped life buoy, which surrounds the waist of the person who has fallen into the water, so that the person who has fallen into the water can float on the water. Ready-to-wear garments comply with the requirements of the SOLAS Convention and IMOxin specifications, and are certified by CCS and are allowed to be used in the fields of ships, ships, anti-smuggling at sea, water construction, water sports, salvage, flood control and flood prevention, sea fishing and leisure.

Waist pack

The inflatable front airbag is installed in a small bag, connected with the waist belt and tied around the waist. It does not hinder the normal operation of operators on the water or on the ship. After inflation, the airbag automatically pops out of the bag. Due to the buckle connection, the airbag drives the human body to float on the surface of the water. At this time, the airbag can be placed over the head and placed around the neck and the chest. The buoyancy effect is similar to that of the inflatable lifejacket. .

Warm life jacket

In 2013, 49-year-old He Guoju jumped into the cold water of the Jialing River, putting on the waterproof and life-saving life jacket he obtained from the National Institute of Technology. Surprisingly, he could stand in the water and drink mineral water leisurely. After spending half an hour in the biting water, my palm was still hot after landing.

The two special certificates of design and utility model issued by the State Intellectual Property Office, the special name of the waterproof and warm life jacket, was issued in March 2013. There are 13 components in the life jacket. The top, pants, boots and gloves are all connected together. The inflatable air bag is removable and can be inflated with the mouth at any time, which is practical and convenient.