Explosion-proof camera is a special camera developed to realize the application of industrial television in flammable and explosive on-site environments. Explosion-proof cameras are currently widely used in many industrial enterprises or research departments in petroleum, chemical industry, coal and scientific research, military and other countries.

During the various processes of experimentation, production, processing, transportation and storage, various flammable and explosive gases, liquids and various dusts and fibers may often leak and spill out. After such substances are mixed with air, It will become a mixture prone to explosion hazards, and the places around it will also become explosion hazards of varying degrees. Due to factors such as site conditions, the concentration of explosive mixtures may continue to increase. When the concentration of explosives reaches the critical point of explosion, serious accidents such as explosions and fires will occur once the detonation source - sparks, arcs and high temperatures occur, causing casualties and property losses. In order to realize the application of industrial television monitoring in flammable and explosive on-site environments, explosion-proof cameras came into being.

Initially, explosion-proof cameras were used underground in coal mines for intrinsic safety. Over the past decade or so, with the process of national industrialization, the demand for explosion-proof requirements has expanded to various fields - petroleum, chemical industry, navigation, aerospace, metallurgy, scientific research and military industry have even greater demands. The requirements are different and more targeted, especially in The rapid development of my country's petrochemical industry has accelerated the development of explosion-proof industrial monitoring products.

Early explosion-proof cameras were mainly intrinsically safe and positive pressure types. The characteristic of the intrinsically safe explosion-proof camera is that the circuit of the camera is intrinsically safe. The electrical line output or input is designed to be controlled below the energy that is insufficient to cause hydrogen to ignite and explode, so that it will not generate electricity during normal operation. Sparks, arcs and high temperatures to avoid detonating explosive materials. However, this type of explosion-proof camera has a complex structure and high cost, which are its biggest shortcomings. In addition, it is not conducive to future upgrades. The positive pressure type is a common structure in early American explosion-proof camera products. It is very inconvenient to maintain during use. If not carefully maintained, the risk of detonation is quite high. Now it has basically been completely eliminated by the explosion-proof camera industry. Other explosion-proof types, such as oil-filled type, sand-filled type, etc., cannot be used on explosion-proof cameras at all.

At present, the international mainstream method of explosion-proof cameras is explosion-proof type. It is characterized in that a conventional ordinary camera is placed in a special casing, which has the function of isolating the sparks and arcs generated by the electrical components in the casing from the explosive mixture outside the casing, and can withstand the explosive mixture entering the casing and being blown away by the casing. The explosion pressure generated by sparks and arc detonations of electrical equipment will not cause the shell to be damaged; at the same time, it can prevent the explosive products in the shell from propagating to the explosive mixture outside the shell, and will not cause the explosive mixture outside the shell to burn and explode. This kind of camera with an explosion-proof shell is an "explosion-proof explosion-proof camera". Our company, Shenzhen Tianxuntong Technology, mainly uses this kind of "explosion-proof explosion-proof camera".

Explosion-proof explosion-proof camera is equal to "explosion-proof camera protective cover" + ordinary camera and lens. In this case, as long as the size is appropriate, the engineering contractor can freely choose the built-in camera and lens, while the cost is also reduced. It is also much more convenient for future maintenance. You can open the cover and take out the camera and lens when the power is turned off. The main difference in the explosion-proof capabilities of "explosion-proof and explosion-proof cameras" depends on the shell material and the sealing of the shell. Stainless steel casing is far superior to carbon steel and aluminum casings and has better corrosion resistance. Especially the survivability in fire situations is much better. For explosion-resistant environments, our usual approach is to thicken the shell.

The development of China's explosion-proof cameras is at the world industry level in terms of technical level. Our country has always been at the forefront of the world in the field of explosion-proof and explosion-proof research. The country has formulated a series of explosion-proof standards, many of which are higher than those in European and American countries. Our country has very strict management of explosion-proof equipment. Explosion-proof products must be put on the market with an "explosion-proof certificate" issued by the State Administration of Explosion-proof after passing inspection, and a "production license" must be held for the production of explosion-proof products, etc.