The safety helmet is a protective device to prevent the head from being injured by the impact object. The utility model is composed of a cap shell, a cap lining, a lower cheek band and a rear hoop. The cap shell is hemispherical, solid, smooth and elastic. The impact and puncture kinetic energy of the hit object is mainly borne by the cap shell. There is a certain space between the cap shell and the cap lining to cushion and disperse the instantaneous impact force, so as to avoid or reduce the direct injury to the head. Impact absorption performance, puncture resistance, lateral rigidity, electrical insulation and flame retardancy are the basic technical performance requirements for safety helmets.
safety hat Specifications
Vertical spacing: measured according to specified conditions, its value shall be within twenty-five － 50MM between.
Horizontal spacing: measured according to specified conditions, its value shall be within five － 20MM between.
Wearing height: measured according to the specified conditions, the value shall be within eighty － 90MM between.
Cap hoop size: divided into the following three numbers
Small: fifty-one － 56CM
medium , please: fifty-seven － 60CM
Large: sixty-one － 64CM
Weight: a complete safety helmet, the weight should be reduced as much as possible, and should not exceed 400G 。
Rim size: small 10MM , larger 35MM 。 The brim is tilted to 20° － 60° Is appropriate.
Vents: Vents can be set on both sides of the safety helmet.
Tongue: small 10MM , larger 55MM 。
Color: The color of safety helmet is generally light or eye-catching, such as white , light color, etc.
safety hat Usage specification
1、 On the power construction site, the safety helmets worn by workers are mainly to protect their heads from injury. It can protect people's head from injury or reduce the degree of head injury under the following circumstances.
(1) When flying or falling objects hit the head;
(2) When operating personnel from 2m And above;
(3) When the head is likely to get electric shock;
(4) When walking or working in a low position, the head may collide with sharp and hard objects.
2、 The safety helmet shall be worn in accordance with standards and used in accordance with regulations. If it is not worn and used correctly, it will not play an adequate role in protection. In general, the following matters should be noted:
(1) Before wearing the helmet, adjust the adjusting belt behind the helmet to a suitable position according to your head shape, and then fasten the elastic belt inside the helmet. The tightness of the cushion pad is adjusted by the belt. The vertical distance between the top of the head and the top of the hat body is generally twenty-five ～ 50mm At least not less than 32mm It's good. In this way, it can ensure that the cap body has enough space to cushion when it is impacted, and it is also conducive to ventilation between the head and the cap body at ordinary times.
(2) Do not wear the helmet sideways, and do not wear the brim on the back of your head. Otherwise, the protective effect of safety helmet on impact will be reduced.
(3) The bottom tie of the helmet must be buttoned under the jaw and fastened firmly, with moderate tightness. This will not be blown away by the strong wind or other The safety helmet falls off due to the collision of obstacles or the head swinging back and forth.
(4) In addition to the cap lining installed inside the helmet body, some of the top of the helmet body also has small holes for ventilation. However, do not open holes for ventilation. Because this will reduce the strength of the cap body.
(5) The safety helmet will be damaged gradually during use. Therefore, regular inspection shall be carried out to check whether there are cracks, dents, cracks, wear and other conditions. If abnormal phenomena are found, they shall be replaced immediately and shall not be used again. Any hard hat that has been hit hard and cracked, whether damaged or not, shall be scrapped.
(6) It is strictly prohibited to use a helmet with only the mandible belt connected to the helmet shell, that is, a helmet without a buffer layer in the helmet.
(7) The construction personnel shall not take off the safety helmet, put it aside or use it as a cushion during site operation.
(8) Since most safety helmets are made of high-density low pressure polymer ethylene It is made of plastic and has the properties of hardening and metamorphosis. Therefore, it is not easy to expose to the sun for a long time.
(9) First check whether there is a new safety helmet issued by the Ministry of Labor door The production permit certificate and product certificate shall be checked for damage, uneven thickness, buffer layer, adjustment belt and elastic belt. Immediately replace the unqualified ones.
(10) Safety helmets shall also be worn during indoor operation on site, especially during indoor live working, because safety helmets can not only prevent collision, but also play an insulating role.
(11) The safety helmet shall be kept clean when used at ordinary times, and shall not touch the fire source, and shall not be painted arbitrarily paint It is not allowed to sit as a stool to prevent loss. If it is lost or damaged, it must be reissued or replaced immediately. No one is allowed to enter the construction site without safety helmet.
Application fields of various helmets
one ． . Glass Steel safety helmet : Mainly used in metallurgical high-temperature workplaces oil field Drilling forest logging, power supply lines, high-rise building construction and Cold region Construction.
2． polycarbonate Plastic safety helmet It is mainly used for oil field drilling, forest cutting, power supply lines, construction and other operations.
3． ABS Plastic safety helmet: It is mainly used in indoor normal temperature workplaces with high impact strength such as mining and machinery industry.
4． Very high polymer Polyethylene plastic Safety helmet: It can be used in a wide range of jobs such as metallurgy, chemical industry, mining, construction, machinery, electricity, transportation, forestry and geology.
5． Modified polypropylene plastic safety helmet: mainly used in metallurgy, construction, forest, power, mining, mine, transportation and other operations.
6． Tape miner's safety helmet: mainly used for operations in coal mines, underground, tunnels, culverts and other places. When wearing, there is no chin strap.
7． Plastic miner's safety helmet: the product performance is basically the same as that of the plastic miner's helmet, except that the high temperature resistance is greater than that of the plastic miner's helmet.
eight Cold proof safety helmet: suitable for field and open-air operators in winter in cold regions of China, such as mine mining, geological drilling, forestry logging, building construction, port loading and unloading.
9． . Paper safety helmet: suitable for outdoor operation to prevent solar radiation, wind and sand, and rain.
10． Bamboo woven safety helmet: mainly used for metallurgy , construction, forestry, mining, wharf, transportation and other operations. eleven Other woven safety helmets: applicable to workplaces in hot areas in the south without open fire.
