1. Choose the right variety
Choose different electrically insulated shoes (boots) depending on where you are wearing. In general, electric insulation shoes and electric insulation cloth shoes with a withstand voltage of 15 kV or less are suitable for working environments with power frequency voltages below 1 kV; boots with electrical insulation rubber boots and polymer materials with a withstand voltage of 15 kV or higher are suitable for power frequency voltage Operating environment above 1 kV. In addition, when wearing electric insulating shoes and electric insulating cloth shoes, the working environment should keep the upper dry.
2, choose a reliable product
Electric insulation shoes are special labor protection articles, and implement industrial product production licenses and safety mark certification systems. When purchasing, first confirm whether the manufacturer of the product has a national production license for industrial products (not required for imported goods) and a safety certification mark. On this basis, check whether the product has the manufacturer's name and address, the industrial product production license number, the safety mark certification number, the production date, the standard number executed by the product, whether it is accompanied by the product certificate and the instruction manual. Pay special attention to check if there is a product name on the shoe.
The user should carefully understand the product standard and the detailed instructions provided by the manufacturer before purchasing the electric insulation protective shoes. It should be fully confirmed according to the operating conditions and protection requirements, and then correctly selected, otherwise it will cause serious consequences.
Look at the logo
Qualified electrical insulation shoes shall have the following markings:
1. There should be a standard number (GB12011), electric insulation shoes (or English abbreviation "EH"), lightning marks and withstand voltage values on the upper or sole;
2. On the upper and the sole, there should be a manufacturer's name, shoe number, product or brand name, production date and electrical insulation performance.
3. The packaging of each pair of electric insulation shoes should include: such as 6kV cow leather surface insulation shoes, 5kV insulation cloth surface rubber shoes and other labels, standard number (GB12011) trademark and instructions for use.
Look at quality
To purchase electric insulation shoes, we must master the quality standards: one refers to the processing quality of shoes, and the other refers to the safety protection quality of shoes. In order to ensure good quality, the state has announced a number of standards for safety protective shoes, and established a quality inspection center, promulgated and implemented production licenses and safety signs, and implemented a supervision and inspection system. The user should use the verified product to ensure the safety protection quality.
Due to the improvement of people's living and working standards, although the cloth insulation shoes are relatively cheap, they are rarely used. Most of them are now electrically insulated shoes.
The quality requirements of electrically insulated shoes include the following:
1.Sole
The sole should have a non-slip function.
There should be no metal hooks and other parts on the sole and heel.
The materials used for the outsole are leather, rubber, polyurethane, vinyl, synthetic rubber, and the like. Some rubber and plastic foam materials are light and soft, and have good elasticity, but the strength is not enough. Therefore, it is necessary to use electric insulating shoes with composite bottom, that is, the outer layer is made of a material with good strength, and the inner layer is made of a soft bottom with good elasticity. This can cushion the impact vibration of the person while walking and the ground, and prevent or mitigate the impact of vibration on the human body.
Outer thickness:
1) direct injection, vulcanization and adhesive outsole thickness should not be less than 4mm, the pattern height should not be less than 2.smm;
2) When the height of the anti-slip pattern cannot be measured, the thickness of the outsole at any place outside the waist socket should not be less than 6 mm.
2. Heel
In order to facilitate walking, the heel should be low-heeled shoes. The optimal height of the heel is 2~3cm, and the shape of the heel should be wide to maintain stability during walking.
3. Help
Material: Due to the diverse working environment and long-term wear, the surface material should be made of materials with better permeability to adjust the microclimate inside the shoe; the structure of the surface material should be tight and have a certain thickness; Feel better, and have better elasticity and softness; at the same time, it requires a certain degree of resilience and resilience, that is, after a long walk and repeated flexion does not cause large deformation; and requires wear and foot type It can be well matched, and it will not cause any tenderness in any part of the foot after wearing.
Thickness: The upper of different materials has different thickness standards. The thickness of any place of the upper should be the same, leather ≥1.2mm, rubber ≥1.5mm, polymeric material ≥1.omm, fabric ≥0.8mm.
4. Inner header
Electrically insulated shoes with impact resistance and pressure resistance generally have an inner toe cap. If the inner head is made of metal material, it shall be surface insulated. The inner head should be fixed between the front and the lining at the front end of the shoe and cannot be moved and removed.
5. Help the bottom connection
The connection between the gang and the bottom is firmer by the molding process, and the bonding stitch is second. If the suture is to be connected with the bottom, the upper and lower penetration stitches should not be used, but the side seams can be used.
6. Shoe size
The shape of the shoe should be adapted to the shape of the foot. The size of the shoe type should be the same as the size of the foot. It should be slightly larger and more fat. After the foot is put into the shoe, there is a gap of 1cm in the toe. This is because The size of the left and right feet of the person is inconsistent. At the same time, the foot will change after walking and in the afternoon and at night, and the maximum volume can be increased by 3% to 5%. When you choose, you can do the following:
Without the laces, move the toes to the front of the shoes, and the index finger can be easily inserted into the back of the heel;
Attach the laces to the thinner part of the toe (recess) and check if there is any space in the front;
After confirming that the above two items are met, try to walk and observe whether the shoes are suitable and fastened, and confirm whether the widest part of the foot and the shoes are consistent.
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