Do you know the main points about explosion-proof cameras?- Zhejiang Brailly Technology Co., Ltd

1. National standards for explosion-proof cameras

After nearly 30 years of development in the explosion-proof industry, the standards are constantly being formulated and strict. At present, the national standard GB3836-2000 is still widely used. However, in view of the frequent occurrence of safety accidents in the past two years, the state has The first, second, third, fourth, eighteenth and nineteenth parts have been revised, and the new national standard: GB3836-2010 was officially implemented on August 1, 2010. This standard has formulated a stricter plan on the basis of the original standard. The changes of the new standard are mainly reflected in the following aspects:

1. The regular inspection is concrete: the original standard does not clearly stipulate the inspection cycle and under what circumstances, but the new standard makes clear requirements for this;

2. Emphasis on the protection level of dust and water: the original standard does not require the protection level of explosion-proof products, while the new standard makes detailed requirements for the protection level of explosion-proof products. At present, manufacturers use more difficult IP67 standards. There are also IP65, and some manufacturers' products even reach the protection level of IP68;

3. Strictly review the qualifications of manufacturers: the original national standard is ambiguous for manufacturers' production licenses ("National Industrial Product Production License ", "Explosion-proof Qualification Certificate", "Coal Mining Product Safety Certificate"), and now manufacturers are required to A production license must be obtained, and manufacturers without a production license or incomplete licenses are absolutely not allowed to produce.

3. Increased criminal responsibility: Unlicensed operation was classified as illegal operation in the original standard, but now it is classified as illegal operation, and the supervision and examination has been strengthened legally.

Second, the past and present of explosion-proof cameras

Explosion-proof cameras are explosion-proof monitoring products, which are cross products of the explosion-proof industry and the monitoring industry. Because conventional camera products cannot be used in high-risk flammable and explosive sites, products with explosion-proof functions and relevant certificates issued by national institutions can be called It's an explosion-proof camera.

Anti-riot cameras are also known as high-security cameras, impact-resistant cameras, anti-strike cameras, and anti-vandal cameras. As the name suggests, an anti-riot camera is a camera that can still ensure the normal operation of the components under the external violence. The characteristic is that its shell has a strong impact resistance.

3. How to realize explosion-proof camera?

So how do explosion-proof cameras achieve explosion-proof? The previous explosion-proof cameras were mainly intrinsically safe and positive pressure types, and intrinsically safe explosion-proof cameras were intrinsically safe through circuits. The positive pressure camera is the common structure of the American mine explosion-proof camera products in the early stage. It is quite inconvenient to maintain during use. If it is not carefully maintained, the risk of detonation is quite large.

At present, the international mainstream is the explosion-proof type, which is characterized by placing a conventional ordinary camera in a special casing, which has the effect of isolating the sparks and arcs generated by the electrical components in the casing from the explosive mixture outside the casing. And can accept the blasting pressure that occurs when the explosive mixture entering the shell is detonated by the sparks and arcs of the electrical equipment in the shell, and the shell is not damaged; at the same time, it can prevent the blasting products in the shell from spreading to the explosive mixture outside the shell. Will not cause the explosive mixture outside the shell to burn and explode. This explosion-proof camera works with an explosion-proof casing, which will be much more convenient for future maintenance.