What is the principle of aircraft life jacket

life jackets are generally divided into two types: inflatable life jackets and foam -type life jackets.

1. Foam -type life jacket refers to the fabric made of nylon or dendrome rubber. It is filled with buoyancy materials such as foam boards in the middle. It has enough buoyancy to wear on the body so that the head of the water drop can expose the water.Generally, what we use belongs to the sea life jacket.It uses EVA foaming material inside, which has been compressed by 3D three -dimensional forming. Its thickness is about 4 cm (domestic products are 5-6 thin hair materials, which is about 5-7 cm thick).The life jackets produced according to the standard specifications have its buoyancy standards: Generally, it is 7.5 kg/24 hours, and children are 5 kg/24 hours, so as to ensure that the surface of the chest is paid above the chest.

2. The inflatable life jacket is divided into two types: automatic inflatable life jacket and manual inflatable life jacket. This kind of life jacket is made of high -intensity Waterproof material. The inflatable life jacket is mainly sealing inflatable vest airbags, micro -pressure gas cylinders and fast -moving air cylinders and fast.The composition of the inflatable valve is often used in the possibility of falling into the water.

Under normal circumstances (not inflatable), the entire inflatable life jacket is Hanging on the back of the shoulder like a strap. Because the volume is small, it does not hinder people's homework.At all times, or automatically expand and inflatable (automatic inflatable life jacket) according to the action of water, or by pulling a cable (manual inflatable life jacket) on the man-charged air valve, it can be inflated into 8-15 kg of buoyancy within 5 seconds.Safe clothes; life jackets hold up the human body upward, so that the head and shoulders are exposed to the surface, so as to obtain safety protection in time.

This kind of life jacket is made of water -resistant and breathable materials on the surface. In addition to paying attention to its buoyancy when choosing, it should also be noted that sharp objects can be avoided or worn through the waterproof layer.Inflatable life jackets should check if they are leaking before use.

What are the use of aviation life jackets

Many friends may think that the plane is safe. If there is an accident, there is no parachute effect. In fact, once an accident occurs, it is completely unrealistic for passengers to escape from parachute.

1. Civil aircraft is not the same as fighters. The engine is next to the cabin door. After parachuting, it is easy to get rolled into the engine, so it is more dangerous to say.

2. The skydiving looks very simple, but in fact, even professional paratroopers have to be trained for 3 months before parachuting. Passengers who have not trained have a greater risk of parachute.

3. Therefore, compared with parachutes, life jackets are more practical. In addition, even if the plane encounters an accident, it can be controlled. The pilot can still control the emergency landing of the plane. The forced landing may land in the lake., River and the sea, at this time, life jackets can play a role.

4. Aviation life jackets also have a certain warmth function. After the cold, the weather can also provide passengers with a temporary cold protection effect.

5. The color of the life jacket is bright, and the rescue personnel can be reminded from a long distance during rescue.

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1. What is swimming life -saving equipment

swimming life -saving equipment, scientific name, swimming float, also known as floating ball, is a life -saving float, a striking orange airbag, a long strap, one tied to the swimmer's waist, and one orange airbag.Looking from a distance, like a chubby little bug followed the swimmer.

This kind of life -saving float is a life -saving equipment designated by the International swimming Federation and the China swimming Association. The design of the double airbags will not affect the swimmer swimming, and it is safer than the lifeburn.In terms of use, it is also more convenient. The length of the band is well controlled and is not easily entangled.And the swimming float color is eye -catching, and it can be used as a life -saving symbol in water.Carrying swimming life equipment in open waters can prevent many swimming accidents from happening.

2. What are the advantages of swimming floating?

1. It can play a warning.The color is bright and can prevent accidents with the traversal.

2. When swimming needs to supplement food or water, you can grasp the swimming float and press it into the water with the help of buoyancy to rest. After the discomfort is eliminated, the physical strength recovers, you can continue to swim.

3. It can play a role in self -rescue.In the event of an accident when swimming, or cramps in the legs, you can save yourself and rest, waiting for others to help further.

4. Can play a role in rescue.Once you really meet a swimmer, you need to help, unlock your swimming float in time, and use it for swimming friends to save each other.

5. You can support it when you are inadequate.Tour swimming floating in the river, lake, and reservoir, tired, you can climb in swimming floating and rest, and then take a rest and rest, so that the swimmers can quickly improve the travel journey.

Third, the shortcomings of swimming floats

1. It may leak air.

2. It is not easy to catch it too much. When the flood is large, it is easy to entangle floating bamboo, branches, anchor cables (ropes), etc., and it is not easy to liberate.

3. When saving people, they cannot dive in time. After swimming in deep water, after the drowning person sinks, the general rescuers generally give up because they cannot dive to the end.

4. What are the types of swimming floating?

1. Rugby -style swimming float

This is the most common float. This kind of swimming float is suitable for swimming pools, rivers, and lakes.Generally speaking, it is suitable for waters with small storms.

2. Flying sauce swimming float

swimming floating inner storage warehouses are suitable for swimming enthusiasts in the shore with small waters with small storms and Outdoor swimming.

3. Pillow -shaped swimming float

This swimming float is large, because there are ropes on the side, which are easy to grab in the water, and are often used in open waters of large storms.

4. Cillar swimming float

Because of its large buoyancy, it can be used in clothing and other characteristics. It is often used for long -distance drift swimming and winter swimming.

Swimmer said

The warning and psychological suggestion of swimming floats are greater than the actual effect.I bought one, tens of yuan, can put some small things, which is very convenient.The trumpet can provide enough buoyancy of adults, but this person who can swim and has a floating foundation.

Do not swim, do not float, or have no sense of balance, and the effect will be poor.

Check the closed conditions before. After launching, be careful not to damage the sharp objects. Pay attention not to entangle your body and cause panic.

swimming is not absolutely safe. It is best to keep the three -point strength in the wild.

What is the material of the life jacket

Life -saving fabric

1. Special nylon material

This kind of fabric is relatively low in price, wide use, but not durable

2. Neoprene choprene rubber (diving material)

This kind of fabric is more expensive, feel soft and comfortable, friction, as long as high -end life jackets can use this fabric.

Life -saving clothing

1. Polyethylene foam plastic

The price of this linoleum is relatively low, with sufficient buoyancy and wide use surface, but the buoyant of the buoyance will change with the time of soaking in the water at about 5%.

2. EPE pearl cotton

The price of this linoleum is obviously more expensive than the foam plastic, and its advantages are obvious.The buoyancy is strong, the life jacket is easy to fold, and it is easy to dry. More importantly, the buoyancy is soaked in the water for a long time.

Life clothing material requirements

1. Plastic should be a soft -closed foam plastic. During the validity period, it is not affected by the erosion of seawater, oil or mold and affects its normal use.It can be stored within the temperature range of -30C to 65C (243 ~ 338K) without damage. It can maintain its performance within the water temperature range of -1c to 30C (272 ~ 303K).

2. Rich kapok oil and must not contain other impurities. The physical properties and moisture content should meet the requirements of norms.After being surrounded by hydrocarbon flames for 2 seconds, the source of the fire should not be burned.Between the kapok and the raw clothing cloth of the kapok life jacket, there must be a waterproof inner cover made of rubber or other waterproof materials.

What is the role of life jacket

1. Help people float on the water

Putting on a life jacket allows people who can't swim to keep their heads exposed to water, thereby reducing the probability of drowning.For those who can swim, the buoyancy of life jackets can save them more physical strength.

2. Cold protection and warmth

Most of the life jackets are made of foam plastic. In the cold water, it can effectively keep warm and reduce the loss of human heat.

3. increase the rescue rate

life jackets are generally bright in color and have anti -light strips, which are convenient to be discovered.At the same time, many life jackets and survival whistle can help people send a distress signal without physical saving.

4. increase the survival rate

Safe clothes can help people float on the surface, which greatly reduces the probability of drowning.At the same time, many life jackets are also equipped with first -aid Bags, which can help people survive better in the harsh living environment.

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The correct way to wear the bloated life jacket

1. Put your head into the life jacket.

2. Tie the straps on the left and right sides.

3. Pull the tension on the left and right sides, the inflatable valve is opened, and the life jacket is inflated within a few seconds.

The inflation function of the qi -blee -type life jacket

1. Manual inflatable: Pull the pull rope on the inflatable device before or after falling or after falling or after falling or after the water, so that the tie rod is not less than 90 degrees, the thorns are pierced to pierce the gas cylinder film, the high -pressure CO2 gas is poured into the airbag, and the buoyant is generated after the gas swells.

2. Automatic inflation: After the water is dropped into the water, the life jacket is immersed in the water to soften the water sensitive element in the automatic device, loses blocking the needle, and the spring stretch pushes the piercing needle to pierce the gas cylinder sealing film CO2 gas to fill the airbag and generate buoyancy.

3. Blowing the mouth is a one -way valve type, and the one -way valve is automatically closed after blowing.

What are the types of qi -style life jackets?

Blay -type life jackets are divided into three types according to the appearance style:

1. Vest -style qi qi and life jackets are commonly known as horses -type qi qi life jackets.

2. scarf -style qi and life jackets are tied to the neck like a scarf.

3. Belt Bloating life jacket, also known as qi -type Belt life ring, water seat Belt.

There are two specifications of all styles of qi and life jackets, one manual type and one automatic type.Suitable for fire, maritime police, water police, armed police, border defense, maritime affairs, fishery administration and other units to engage in water rescue activities.

The performance indicators of qi -blee -type life jackets

1. Automatically inflatable within 5 seconds of water, generate more than 15 kg of buoyancy.The 24 -hour buoyancy loss is less than 5%, and the performance of the main accessories and materials meets national standards.

2. The airbags are made of imported polyether TPU materials, which have excellent aging resistance and hydrolysis characteristics.

3. The dry side of the water is greater than 120mm, and the backward angle is 20-50 degrees.

4. The product is standard for search whistle and reflective stickers.

What are the fabrics of qi -qi -type life -saving clothing

Bid-type life jackets use TPU fabrics, TPUs (Thermoplastic Polyurethanes), and thermal plastic polymethlate, which is a linear embedded cluster composed of low polymer polymirol soft segments and diisocyanate-expansion hard segments.The TPU can be made of saliva, film blowing, pressure delay, or coating, which has the excellent characteristics of good elasticity, strong toughness, abrasion resistance, good cold resistance, and environmental protection and non -toxic.TPU fabric has the following characteristics:

1. Hardness planning wide

After changing the ratio of the components of the TPU composite fabric, the Tent cloth can get products of different hardness, and follow the hardness of the hardness. Its product still adheres to excellent elasticity and abrasion resistance.

2. High mechanical strength

The carrying capacity, impact resistance and shock absorption function of TPU composite fabric products are excellent.

3. Extremely cold -resistant

The glass state changing temperature of the TPU composite fabric is relatively low, and the canvas factory still adheres to excellent elasticity, softness and other physical functions at minus 35 degrees.

4. Good processing function

TPU composite fabrics can be processed with common thermoplastic materials, such as injection molding, extrusion, pressure extension, and so on.At the same time, the TPU composite fabric/cloth processing with certain polymer materials can obtain a polymer alloy with complementary functions.

5, oil resistance, water resistance, mold resistance.

6. Good recycled utilization.

There are two methods of TPU composite fabric. One is called and then sticked: first make it into a TPU film, then fit the glue with the fabric, and the other is called online composite: apply the glue on the fabric may not be glued.The fabric is made into a TPU composite fabric or clipped mesh.

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[How to save self -rescue at sea] How to save self -rescue and rescue methods on the sea of self -rescue at sea

How to save self -rescue at sea Self -rescue and rescue methods at sea

1 Generally speaking, it is not encouraged to jump first, because in the water, the body temperature of the human body is lost quickly, and it may be taken away by the water.Under the circumstances of environmental permission, you can skip the boat, pay attention to avoid the shallow beach reef.To quickly leave the shipwreck, if the Ship is covered, you must jump to the head of the bow.

2 Once the water falls, be sure to leave the hull quickly to prevent the vessels from being inhaled again.At the same time, you should raise your head to tilt your body.After maintaining this attitude for a few seconds, you can slowly float on the water with the powerful buoyancy of the life jacket.

3 Do not make unnecessary swimming after falling into the sea, to save physical strength and wait for rescue.

4 Creation of swimming will be rescued!When the Ship is sinking, the sucking power will be generated. Paralying, the place where the fluid is high at a high speed, and the sinking Ship is slightly stronger. Pressing people around the Ship, can't get out, and make people drown.

5 Self -rescue methods that do not swim: When sinking down, keep calm, close your lips, bite your teeth and hold your breath. Do not struggle in the water.Slowly float on the water.After floating on the water, do not lift your hand out of the water, and place it under the water to keep your head above the water surface so that you can breathe air.

6 The most important thing is to maintain physical strength. When someone comes to rescue, use the whistle and reflective equipment on the life jacket to attract the attention of the rescue staff.

Method for forced to drift on the sea

1 , Warm with your companions

When encountering the drifting condition, if the companions are around, they will match each other to warm the back to maintain the body temperature.

2 , Use the mirror reflection principle to create signals

Use metal items floating at sea as a reflector.The slightly shaking mirror allows the reflected light flash to intermittent, attracting the attention of search and rescue personnel.

3 , Avoid sunburn

Surviving on the sea, sunburn is a question worthy of face -to -face.We must avoid direct contact with the sun with the body, and try to find a paste from the first aid tools to isolate the damage caused by the sun to the Skin to prevent the occurrence of sunburn.In addition, the reflected strong light brought from the sun to the water surface is also a sunscreen element that cannot be ignored. Therefore, the head and eyes must be careful of the damage caused by such strong light.

4 , Avoid dehydration

Galmic (sea) may increase the occurrence of dehydration.To survive on the sea, in order to avoid dehydration, we should try to reduce the number of times to go to the toilet and keep ourselves in the body. If you feel uncomfortable, try not to make ourselves more comfortable by vomiting.

5 , Avoid the trouble of blindness and head damage

If you are infected with flames, cigarettes or other pollutants on the water, we must first wash the pollutants with salt water and then rinse it with fresh water.Eye cover18 to twenty four Hours, even longer.In order to avoid strong light from the sky and water harm your eyes, if you are prepared, wear Sunglasses to protect your eyes.

6 , Pain caused by salt water

Soaking in the body for a long time may cause the Skin wound, and the original blisters or scars on the body may be thick or torn again. At this time, in addition to avoid touching the wound, we must use fresh water to rinse it.EssenceIf possible, keep the wound dry and use the desiccant.

7 , Keep physical energy (1)

The loss of body fluid and exhaustion of physical strength will cause more damage.If you start to feel a halo, start vomiting, try to change the place, and stay away from vomit and smell.

8 , Keep physical energy (2)

Do not deliberately rely on exercise to maintain body temperature. Instead of deliberately circulating, the body temperature is easier to lose, and the exhaustion will make it easier for us to accelerate the temperature loss of the body in cold water.Maintaining buoyancy and using various kinds of materials is the best way to save self -help.

If the waves on the sea, if you do not wear water and lung Diving equipment, you may not be able to breathe at sea and the method, then according to the following practice:

Step 1: Take a deep breath.Step 2: Put your face in the water, close your mouth, stretch your arms forward, and relax.Step 3: Keep this posture rest.Step 4: Looking out of the water, stepping on the water, and venting the head into the water.Such a cycle.

9 ,keep Calm

Keep your head calm, do not shout without any help, and do unknown and physical action.