How much do you know about helmets?


Release time:

2021-01-12

A safety helmet is a shallow dome hat made of steel or similar materials used to protect the head and protect the head from impacts. It is composed of cap shell, cap lining, lower cheek belt and back hoop. The cap shell is hemispherical, firm, smooth and elastic. The impact and puncture kinetic energy of the striking object are mainly borne by the cap shell. There is a certain space between the cap shell and the cap liner, which can buffer 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 requirements for the basic technical performance of the helmet.

Main structure of 1. safety helmet
A safety helmet is a shallow dome hat made of steel or similar materials used to protect the head and protect the head from impacts. It is composed of cap shell, cap lining, lower cheek belt and back hoop. The cap shell is hemispherical, firm, smooth and elastic. The impact and puncture kinetic energy of the striking object are mainly borne by the cap shell. There is a certain space between the cap shell and the cap liner, which can buffer 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 requirements for the basic technical performance of the helmet.

 

 

Cap shell: to withstand the blow, so that the falling object is separated from the human body.
Hat hoop: to keep the helmet in a definite position on the head.
Top belt: disperse the impact force and keep the cap shell floating to disperse the impact force.
Rear hoop: the locking device of the headband.
Jaw strap: assist in maintaining the state and position of the safety helmet.
Sweat belt: absorb sweat.
Cushion: When an impact occurs, reduce the impact force.






2. safety helmet color identification
1. Power system color classification: red, yellow, blue, white

 

Leader/Visitor

 

Maintenance personnel

 

Construction/inspection personnel

 

x

Management personnel

 

3. safety helmet main role

Wearing a safety helmet is mainly to protect the head from injury. It can protect a person's head from injury or reduce the degree of head injury in the following situations:

1. When falling objects hit the head.

2. When the operator falls from a height.

3. When the head is likely to electric shock.

4. When walking or working in a low space, the head may collide with sharp and hard objects.

 

Proper Use of 4. Safety Helmet

1. Before wearing the safety helmet, adjust the adjustment belt after the cap to a suitable position according to the head type, and then fasten the elastic band in the cap. The tightness of the cushion is adjusted by the strap, and the vertical distance between the top of the head and the top of the cap body is generally between 25~50mm, not less than 32mm.

2. Do not wear the safety helmet askew, and it is strictly forbidden to wear the brim behind the brain.

3. The mandibular band of the safety helmet must be buckled under the jaw and fastened firmly, with moderate tightness.

4. The top of the safety cap body is strictly prohibited from opening small holes for ventilation except for the cap lining installed inside the cap body.

5. Regular inspection, found that there are cracks, concave, cracks and wear, etc., found abnormal phenomena should be replaced immediately, prohibit continued use. Safety helmets that have been hit hard or cracked shall be scrapped regardless of damage.

6. It is strictly prohibited to use only the safety cap connected with the mandibular belt and the cap shell, and it is strictly prohibited to use the cap without a buffer layer.

7. Construction personnel shall not take off the safety helmet, put it aside, or use it as a cushion during on-site operation.

8. Most of the safety helmet is made of high density low pressure polyethylene plastic, it is strictly prohibited to expose to the sun for a long time.

9. For the new helmet, check whether there is a product certificate to see if it is damaged, uneven in thickness, and whether the buffer layer, adjustment belt and elastic belt are complete and effective. Do not meet the requirements of the immediate replacement.

10. On-site indoor operations should also wear safety helmets, especially indoor live work, but also to wear good safety helmets, safety helmets can not only prevent collision, but also play a role in insulation.

11. When using safety helmets at ordinary times, they should be kept clean and tidy, do not touch fire sources, and do not apply paint arbitrarily. No helmet is allowed to enter the construction site.

 

ensure proper care and treatment

 

5. common risk factors
According to the "Electric Power Safety Work Regulations" and the actual needs of electric power production, personnel engaged in electric power production must wear safety helmets when entering the high-voltage area (room) of the substation, the capital construction site, the repair workshop and other high-altitude operations, which is an important measure to ensure the personal safety of production. However, many safety helmets used on site have potential safety hazards, and there are also many potential safety hazards in the use process, which must be faced squarely.
1. The safety helmet itself has quality problems
In practice, high-quality brand-name products that meet the national standard and pass the ISO quality system certification and compulsory product certification should be selected.
2. Safety helmet as helmet, when stool
Safety helmets prevent falling objects from high altitude from hurting people, while helmets are used to prevent impact and falling. The two have different protection points and different functions, so they cannot be replaced. When entering the production site, you must wear a safety helmet. It is illegal to take off the safety helmet at will. When the stool is used, it will cause damage to the safety helmet or reduce the service life.
3. Super-cycle use
Plastic cap, paper cap is not more than two and a half years, glass fiber reinforced plastic (vinylon steel) rubber cap is not more than three and a half years.
4. Improper storage
The combined temperature of the safety helmet is -10 to 50 ℃, and it should be placed in a dry place with ventilation, and avoid contact with fire (heat) source and corrosive substances, so as not to affect its normal use.
5. Lack of necessary checks before use
Routine inspection of the following items shall be carried out before use: the cap shell shall be free of damage, crack and significant deformation; the cap lining shall be free of damage; the cap hoop shall be intact and firmly connected with the cap shell; the cap belt shall be free of erosion and scars; the lock buckle shall be complete and effective; it shall be scrapped immediately after severe impact, and no reuse shall be made.