Personal Protective Construction Safety Helmet Manufacturer, High Quality Adult Mining Industrial Worker Price Safety Hard Hat

1. Helmet Structure:

The helmet is composed of a cap, a cap liner and a chin strap.

(1) Cap: This is the main part of the helmet, generally adopting an elliptical or semi-spherical thin shell structure. This structure will produce a certain pressure deformation under the impact pressure. Due to the rigidity of the material, the absorption and dispersion of the material are affected, and the smooth surface and the circular curve tend to cause the impact object to slip away, thereby reducing the impact time. Depending on the needs and strength of the helmet shell, the housing can be made in a variety of styles such as top, top, side and no edge.

The cap of the helmet includes a visor, a brim, a top rib, a venting hole, a socket, a lining with a hole, and a chin strap.

a. visor: the part of the front of the cap that protrudes;

b. brim: the portion of the cap that protrudes around the outside of the cap;

c. top rib: the part used to enhance the strength of the top of the cap;

d. venting holes: air holes opened in the cap;

e. socket: an insertion structure for connecting the cap to the cap liner and the accessory;

f. Connection hole: connecting the opening of the cap liner and the cap

(2) Cap lining: The cap lining is a general term for the parts directly contacting the top of the wearer's head in the cap, and is composed of a cap hoop belt, a top belt, a belt, a belt, a sweatband, a cushioning reel and the like. The material of the cap lining can be made of cotton webbing, synthetic fiber tape and plastic lining. The cap is an endless belt, which is tightly wrapped around the person's head when worn. The forehead part of the belt is lined with sweat-absorbing material and has a certain sweat absorption effect. . The cap hoop can be divided into two types: a fixed strap and an adjustable strap. The cap has two types of back collar and no back loop. The top strap is a strap that is in contact with the top of the head. The top strap and the cap can be connected by rivets, or the socket of the strap can be connected to the socket of the cap, and the top is provided with a cross shape and a six-bar shape. There are 4 to 6 sockets.

Cap lining: A general term for the internal parts of the cap. Including cap top straps, belts, straps, sweatbands, pads and tethers.

a. Hoop: a band that acts as a fixing around the circumference of the head;

b. strap: a strap that is in direct contact with the top of the head;

c. Guard belt: a layer on the top of the belt that does not touch the top of the head, which acts as a buffer;

d. Tether (belt): a rope (belt) that connects the carrier and the belt, the cap liner and the cap;

e. Sweatband: a band of sweat-absorbent material wrapped around the hood;

f. pad: a cushion that acts as a cushion between the cap and the cap;

g. Rear hoop: an adjustable hoop is added to the back of the hoop;

h. Cap liner: A fitting that connects the cap liner to the cap.

(3) Lower jaw belt: The strap on the lower jaw of the foot is used to fix the helmet. The lower jaw belt is composed of a belt and a locking card. There is no cap liner for the back cuff, and a "y" shaped chin strap is used.

2. Classification of Helmets:

2.1. The helmet products are divided into two categories according to the general operation type (Y type) helmet and special operation type (T type) helmet. Among them, the T category is divided into five categories:

Class T1 is suitable for workplaces with fire sources;

T2 is suitable for underground mines, tunnels, underground works, harvesting and other work sites;

T3 is suitable for flammable and explosive workplaces;

T4 (insulation) is suitable for live working places;

T5 (low temperature) is suitable for low temperature applications.

2.2 According to the production materials:

Can be divided into FRP helmets, polycarbonate plastic helmets, ABS plastic helmets, ultra-high molecular polyethylene plastic helmets, modified polypropylene plastic helmets, plastic helmets, cold helmets, bamboo helmets and so on.

FRP helmet: mainly used in metallurgical high temperature working places, oilfield drilling forest harvesting, power supply lines, high-rise building construction and construction in cold areas.

Polycarbonate plastic helmet: mainly used for oilfield drilling, forest harvesting, power supply lines, construction and other operations.

ABS plastic helmet: mainly used in indoor and normal temperature working places with high impact strength such as mining and machinery industry.

Ultra-high molecular polyethylene plastic helmet: It has a wide range of applications, such as metallurgical chemical, mining, construction, machinery, electricity, transportation, forestry and geology.

Modified polypropylene plastic helmet: mainly used in metallurgy, construction, forestry, electric power, mining, uphole, transportation and other operations.

Tape miners helmets: mainly used in coal mines, underground mines, tunnels, culverts and other places. When worn, there is no chin strap.

Plastic miner safety helmet: The performance of the product is basically the same as that of the colloidal miner's cap except that the high temperature resistance is higher than the colloidal miner's cap.

Cold-proof helmet: Suitable for winter field and open-air operations in cold regions of China, such as mining, geological drilling, forest harvesting, construction and port loading and unloading operations.

Paper rubber helmet: suitable for outdoor work, to prevent solar radiation, sand and rain.

Bamboo-made helmets: mainly used in metallurgy, construction, forestry, mining, docks, transportation and other operations.

Each type of helmet has certain technical performance indicators and scope of application. Therefore, it is necessary to select the appropriate product according to the industry and working environment used. Consumers can select the appropriate product according to the industry and working environment used. For example, the construction industry generally uses Y-type helmets; in the power industry, T4 (insulation) helmets should be used for contact with power grids and electrical equipment; T3 helmets should be selected for operation in flammable and explosive environments.

2.3. By Color:

The choice of helmet color is relatively random. Generally, it is suitable for light color or eye-catching color, such as white or light yellow. It can also be selected according to the requirements of relevant regulations. It should be selected according to the principle of safety psychology. Choose according to the workplace and environment.

The color of the helmet is generally divided into: white hard hat, red hard hat, blue hard hat, yellow hard hat

The person with white safety helmet is usually the supervisor or Party A. The supervisor is also the site manager that we think is generally the middle-level personnel of the project. It is mainly responsible for the planning and implementation of the site and the quality of the project.

Red helmets are usually carried by technicians, managers or Party A. People with red helmets are relatively complex, but generally can be divided into two categories: technicians and middle and low-level managers.

A technician with a blue helmet is generally a technician. Red helmets and blue helmets are different depending on the company. In general, most of them are worn by technicians.

The most common is the average worker with a yellow helmet. Basically, the average worker on the construction site in China has worn a yellow helmet.

3. Hard hat performance requirements:

(1) General requirements

(1) The cap is straightened according to the applicable range.

(2) The forehead area of the cap should have a sweat absorption or an increase in the sweat band, the width of which is greater than or equal to the width of the cap.

(3) The lacing shall be a soft woven fabric, a belt having a width of not less than 10 mm or a rope having a diameter of not less than 5 mm.

(4) Do not use toxic and harmful materials. Materials that come into contact with human body parts should not cause allergic stimuli to the skin.

(5) The aging resistance of the material shall not be lower than the date indicated on the product label. The helmets in normal use shall not cause performance below the standard due to material reasons during the period of use, and all materials used shall have the same life expectancy.

(6) The helmet attachment shall not impair the stability of the helmet when it is properly worn.

(7) Weight (mass): The ordinary helmet does not exceed 430g; the cold helmet does not exceed 600g.

(two) basic performance

(1) Impact absorption performance: According to the specified method, after high temperature, low temperature, water immersion and irradiation pretreatment, the impact test shall be carried out, and the force transmitted to the head mold shall not exceed 4900N; the shell shall not have fragments falling off.

(2) Puncture resistance: Puncture test is carried out according to the prescribed method after high temperature, low temperature, water immersion and irradiation pretreatment. The steel cone does not contact the surface of the head mold; the shell does not have debris falling off.

(3) Strength of the mandibular band: According to the prescribed method, the force value when the mandibular band is broken should be 150-250N.

(3) Special performance

(1) Electrical insulation performance: Tested according to the specified method, the leakage current does not exceed 1.2 mA.

(2) Flame retardant performance: Test according to the specified method, the continuous burning time shall not exceed 5s, and the cap shall not be burnt through.

(3) Lateral rigidity: Tested according to the specified method, the maximum deformation does not exceed 40mm, the residual deformation does not exceed 15mm, and the cap shell must not fall off.

(4) Antistatic property: Tested according to the specified method, the surface resistance value is not more than 100 million ohms.

(5) Low temperature resistance: After pre-treatment at low temperature (-20 °C), the impact test shall be carried out. The force transmitted to the head mold shall not exceed 4900 N; the shell shall not have debris falling off; and then another sample may be pretreated (-20 ° C). After the treatment, the puncture test shall be carried out. The steel cone shall not touch the surface of the head mold, and the shell shall not have debris falling off.

4. Hard hat selection rules:

4.1. Qualified products should be selected

The helmet must be produced according to the national standard GB2811. The factory products should pass the quality inspection department to meet the standard requirements before the product certificate can be issued. When purchasing the helmet, it should be seen whether the production license and the validity period are held.

4.2. Choose the right variety

(1) According to the performance selection of the helmet: each safety cap has certain technical performance indicators and its applicable range.

(2) The choice of style, large hat and big cap are suitable for open-air operation. This helmet has the function of preventing sun and rain. The small hat is used for indoor, tunnel, culvert, well, forest, scaffolding. The scope of the superior activities is small, and it is prone to a narrow place where the brim collision occurs.

(3) Regarding the color of the helmet, the principles of safety psychology should be followed. The more common yellow and black bars in the world are the signs that cause vigilance. Red is a sign indicating restriction and prohibition; blue is used to show the effect. Therefore, it is advisable to use white, light yellow or light green for the helmets used in common types of work. For mining helmets, coal mines are accustomed to black color, which may be invisible because coal dust is black stained helmets, while other colors are easily detectable. However, the miner's cap is black, which obviously does not meet the safety ergonomics principle. Because the under-lighting of the mine is poor, the black miner's cap is easy to cause a safety accident due to blurred vision when the contrast between light and dark is not obvious. Therefore, it should be bright colors for easy discovery. Causes vigilance. In addition to black, the color of the miner's cap has other colors, and the reflective material or the luminescent material is adhered to the helmet so that it can attract people's attention under the dark light. Some departments use different colors of helmets to distinguish the position, such as safety management personnel wearing a green cross-marked white safety helmet, maintenance personnel wearing orange-red helmets. In the forest harvesting site, red or orange-red helmets are eye-catching and can be easily found. The radioactive working environment usually uses a purple, coffee bag, a helmet, a flammable and explosive working place, and a red helmet.