Labor insurance shoes are a kind of shoes that have a safety protection effect on the feet. There are many types of it, such as toe protection, puncture resistance, insulation, acid and alkali resistance, etc. The selection of safety shoes should be based on the nature and degree of the hazard of the working environment. Labor insurance shoes should have a product certificate and product manual. Before use, you should read the instructions according to the conditions of use, and the method of use must be correct. Special protective labor protection shoes should be checked and kept clean after use, and stored in a pollution-free and dry place.
Classification and common functions of labor insurance shoes
According to common functions, safety shoes are generally divided into three types: anti-smashing safety shoes, anti-smashing anti-puncture safety shoes, and electrical insulation safety shoes (withstand voltage> 6 kV).
Anti-smashing safety shoes and steel-toed safety shoes are the same type, that is, safety safety shoes that protect the toes. The main function is to prevent falling objects from hurting the feet.
The puncture-proof labor insurance shoes are used to protect the soles of the feet and prevent being punctured by various sharp and hard objects.
Other according to the occasion of use and the special purpose of the safety shoes, there are also points:
Oil-proof labor protection shoes are used in places where the ground is oily or splashed;
Waterproof labor protection shoes are used in workplaces where ground surface water or splashing water;
Cold-proof labor protection shoes are used to protect the feet of low-temperature workers from frostbite.
The main function of steel-making labor protection shoes is to prevent burns and punctures, and should be able to withstand a certain static pressure and temperature, and be non-flammable. This type of safety shoes is suitable for smelting, furnace front, cast iron, etc.
In addition to the above, there are also some special labor insurance shoe covers, such as canvas, asbestos, and aluminum film labor insurance shoe covers. The choice of labor insurance shoes mainly depends on whether the manufacturer has obtained the “National Industrial Product Production License”, “LA Safety Mark Certification”, whether there is a relevant standard test report, whether the test method is correct, and whether the result is true.
Performance analysis of safety shoes
Baotou impact resistance
The impact test is carried out with a steel impact hammer of the specified weight. When the toe cap is impacted, the gap height under the toe cap should be less than the specified value, and there should be no penetrating cracks in the toe cap in the direction of the test axis. It is worth noting that the requirements of the weight, specifications, impact height and the structure of the testing machine in the national standards are different, and they should be distinguished during the actual test.
Puncture resistance performance
The testing machine is equipped with a pressure plate, and the pressure plate is equipped with test nails. The test nail is a head with a truncated tip. The hardness of the nail head should be greater than 60HRC. Place the shoe sole sample on the chassis of the testing machine so that the test nail can pierce through the outsole. The test nail pierces the sole at a speed of 10 mm/min ± 3 mm/min until it penetrates. Record the required The greater force. Choose 4 points on each sole for testing (at least one point is on the heel), the distance between each point is not less than 30mm, and the distance from the edge of the insole is greater than 10 mm. The bottom with non-slip blocks should be pierced between the blocks. Two of the four points should be tested within a distance of 10-15 mm from the edge line where the bottom corrugated plant is located. If humidity will affect the results, the shoe sole should be immersed in deionized water at 20℃±2℃ for 16±1h before testing.
Electrical performance of conductive shoes and anti-static shoes
After the shoe sample is adjusted in the dry and wet atmosphere, fill the clean steel ball into the human shoe and place it on the metal probe device. Use the specified resistance test instrument to measure the first two probes and the third probe. Between the resistance. In general, conductive shoes require resistance not greater than 100K ohms; anti-static shoes require resistance between 100K ohms and 100M ohms.
The selection of safety shoes should be based on the nature and degree of the hazard of the working environment. Labor insurance shoes should have a product certificate and product manual. Before use, you should read the instructions according to the conditions of use, and the method of use must be correct. Special protective labor protection shoes should be checked and kept clean after use, and stored in a pollution-free and dry place.
