What are the common problems with explosion-proof cameras?

Lead: What are the common problems with explosion-proof cameras? After understanding the working principle of explosion-proof camera, engineers can propose to the manufacturer of explosion-proof camera that they can choose the built-in camera and lens, and then match the appropriate explosion-proof camera cover, which reduces the cost. For future maintenance, it is also much more convenient. After the power is cut off, the camera and lens can be opened and taken out. The following is the relevant content I have compiled, welcome to check!

What are the common problems with explosion-proof cameras? Where do I need an explosion-proof camera? Do gas stations need to install explosion-proof cameras?

A: The state has adopted the standards for the use of electrical equipment, such as explosion-proof cameras-monitoring electrical equipment. National standards include GB3836. 1-20 10, GB3836.2-20 10, GB 12476. 1-2000, GB12477. According to the frequency and duration of explosion environment, dangerous places are divided into gas places and dust places. The gas field is divided into three zones: Zone 0, 1 and Zone 2. The dust field is divided into three areas: area 20, area 2 1 and area 22. Flammable gas, steam and mist gas places.

The above places mainly refer to: petroleum, chemical industry, docks, oil depots, ships, drilling platforms, gas stations, mines, ports, aerospace, military industry, medicine, steel, fireworks production, machinery, grain processing and storage and other places. Gas stations are flammable and explosive places, so the electrical equipment used must also be explosion-proof. If monitoring is needed, an explosion-proof camera must be used. If you use an ordinary surveillance camera, it is easy to cause an explosion.

Question: What is the explosion-proof camera like?

Answer: the explosion-proof camera should have the following three points: 1, which can be explosion-proof. 2, there is a camera monitoring function. 3. Have relevant certificates issued by national authorities. Can the above three points be called? Explosion-proof camera? .

What's the difference between explosion-proof cameras and riot cameras? Riot? Its main function is to prevent violence, injury or blow. These products have a hard shell, but there is no explosion-proof electrical performance and certification. These are two completely different products. Remember not to use riot control products in areas with high flammability risk, which may even cause serious damage to people and property due to explosion.

Required certificates:

1. The explosion-proof certificate is issued by the explosion-proof test center of the State Electrotechnical Commission.

2. The production license (explosion-proof electrical appliances) is issued by AQSIQ;

3, the national mine product safety licensing office issued the "mine product safety signs";

4. The product inspection report is issued by AQSIQ. Domestic classification (Class III): Class I, explosion-proof camera special for coal mine, namely MA certification; Class II, explosion-proof camera that can be used in any place with dangerous gas except underground coal mine, and the explosion-proof mark is EX; Class III, previously marked as DIP to prevent dust explosion.

Question: How to choose explosion-proof camera lens and what are its parameters? Compared with 4mm, 6mm, 8mm and 12mm lenses, how far can you see and what is the angle?

A: First of all, when purchasing explosion-proof camera lenses, you should choose them according to actual needs. The lens principle is that the smaller the number of millimeters of the lens, the larger the monitoring angle and the closer the distance. On the contrary, the greater the number of millimeters of the lens, the smaller the monitoring angle and the farther the monitoring distance.

Such as: 4mm lens, monitoring angle 70? , distance range: 0m~6m.

6mm lens, monitoring angle 50? Distance range: 5m~ 10m.

8mm lens, monitoring angle 38.5? Distance range: 10m~20m.

12mm lens with monitoring angle of 26.2? Distance range: 20m~35m.

Question: What's the difference between explosion-proof cameras and ordinary cameras?

Answer: To distinguish explosion-proof cameras from ordinary cameras, we should distinguish them from their functions and applicable places. They can also be distinguished by their definitions. There is no essential difference in photoelectric structure between explosion-proof camera and ordinary industrial camera. Its most important feature is to use one or more explosion-proof forms to deal with industrial cameras, so that they can be monitored in flammable and explosive field environment.

At present, the mainstream explosion-proof camera mode in the world is flameproof. This type is also called: explosion-proof camera. Its working principle is to isolate the spark or arc generated by electricity in the shell by using the explosion-proof shell. So even if the outside is full of flammable and explosive gases, it will not cause an explosion. Such a camera can play a monitoring role in flammable and explosive environments, thus ensuring the safety of people.