What is an explosion-proof intercom? Matters needing attention in purchasing explosion-proof walkie-talkie

With the step-by-step development of science and technology, there are some tools that are beneficial to the development of all walks of life. Bian Xiao gave a simple example here. For example, in the mid-9th century, the telephone invented by famous foreign scientists has become an epoch-making thing all over the world, which gives people who are doing business and wandering abroad a way to contact their families and express their condolences to each other.

Today, Bian Xiao introduces you to an explosion-proof intercom tool that appears in our life. Then I must be very strange. A walkie-talkie is a walkie-talkie. What is the word explosion-proof? How does it work? Also, what's the difference between this explosion-proof walkie-talkie and ordinary walkie-talkie Under what circumstances are explosion-proof walkie-talkies generally used? In what industry do you usually use explosion-proof walkie-talkies? Don't worry, Bian Xiao will explain to everyone here.

We know that walkie-talkies are used in many jobs, such as some policemen, traffic policemen, hotels and so on. The walkie-talkie can communicate with the other party better and faster, so that the other party can know the information in time. Let's talk about some differences between explosion-proof walkie-talkies and ordinary walkie-talkies Although there is no obvious difference in appearance between explosion-proof walkie-talkies and ordinary walkie-talkies, the biggest difference lies in their physical principles and some raw materials used in production. As for why it is explosion-proof, Bian Xiao will give you a simple explanation. Explosion-proof walkie-talkie does not mean that this kind of walkie-talkie is explosion-proof, but that it can be used to work in a dangerous gas environment.

We know that walkie-talkies need electromagnetic waves to transmit signals output by people. But the signal output by people is strictly alternating between electric field and magnetic field. In this alternating process, it is easy to produce electric sparks harmful to human body. As for the explosion-proof walkie-talkie, it is because some special physical changes have taken place when the circuit is working. When the signal starts to transmit, all the areas that are easy to generate sparks harmful to human body are directly shielded.

Principle of explosion-proof interphone

There is no difference in principle, just making a fuss about power supply. The explosion-proof interphone adopts intrinsically safe power supply. Intrinsically safe power supply is+? -? Electrode connection will not produce electric spark. The reason is that the maximum current is controlled.

Characteristics of explosion-proof walkie-talkie

Explosion-proof walkie-talkie is different from civil walkie-talkie. Besides high performance in special environment, it also needs other advanced functions. It can achieve clearer and louder voice quality and keep communication smooth even in noisy environment.

Because ordinary mobile phones and other communication tools may produce arc or electrostatic discharge when launching, and even cause fire under certain conditions. The fourth section of Chapter 4 of China Petroleum Gas Station Management Code clearly stipulates that ordinary communication tools are strictly prohibited in refueling sites and oil tank areas.

In this high-risk environment, professional explosion-proof communication tools must be used for communication. This product is suitable for harsh environment with dangerous combustible gas or dust, such as petrochemical industry, coal mine, chemical industry, thermal power, food processing and other industries.

Explosion-proof interphone grade

The popularity of explosion-proof walkie-talkies in special operations has promoted the continuous development of explosion-proof walkie-talkies and their adaptation to different harsh environments. From the level of explosion-proof walkie-talkie, it can be divided into levels, segments and groups. The general level is represented by Roman numerals, which represents explosiveness, and the level I represents the mixture of gasoline (and other petroleum products) and volatile gases such as air; Class II represents a mixture of dust and air; The third category represents the mixture of suspended particles in the air. The first to third levels represent different explosion degrees, which decrease in turn.

The classification of sections is 1 and 2: 1. Section refers to the place where explosive gas exists during normal operation, and section 2 refers to the place where explosive gas will exist during abnormal operation or equipment failure. The grade distribution of group A is acetylene gas, group B is hydrogen gas, and group C is ethylene and ether. Group D: propane, acetone, ammonia, benzene, butyl acetate, gasoline, cyclopropane, natural gas, etc. All of them are waste gas after petroleum distillation, but they represent dust in E-G group, mostly metal dust in E group, carbon dust in F group and particle dust in G group. And its explosion-proof degree is also decreasing.

Explosion-proof walkie-talkies can only be used in dangerous environments, and there must be models and measures to deal with every potential safety hazard. Because of the use of explosion-proof walkie-talkies and various aspects of wear and tear, it is generally necessary to return to the factory for re-testing after two years of use to determine the explosion-proof grade. Only in this way can we ensure long-term and stable work.

The explosion-proof walkie-talkie can maintain high performance during use. Considering the needs of some petrochemical fields, some radios with stricter explosion-proof performance are customized for production. During use, the battery can't be replaced at will, and the walkie-talkie can't be disassembled, so as not to affect the circuit during replacement, causing electric sparks and danger.

Difference between explosion-proof walkie-talkie and ordinary walkie-talkie

Explosion-proof walkie-talkie is no different from ordinary walkie-talkie, but it is quite different from ordinary models in material and physical characteristics.

1: category (explosive)

Category I: Volatile gasoline (and other petroleum products)/air mixture.

Category II: Dust/air mixture

Category III: Suspended matter/air mixture

2. Division

1 section: the place where explosive gas environment exists during normal operation;

Part II: Places where explosive gas exists during abnormal operation or equipment failure.

3. Group

Group a: acetylene gas

Group b: hydrogen

Group C: ethylene, ether, etc.

Group D: propane (liquefied petroleum gas), acetone, ammonia, benzene, butanol, gasoline, cyclopropane, natural gas, etc.

Group e: metal dust

Group f: carbon dust

Group g: grain dust

Instructions for use of explosion-proof walkie-talkie

1、? Do not replace batteries and other accessories in a dangerous environment. Contact sparks generated during disassembly may lead to explosion or fire. Even the products certified by explosion-proof testing institutions should not expose the accessory connectors when used in dangerous atmosphere. When the accessory connector is not needed, it should be tightly covered with a dust cover.

2、? After two years of use, the explosion-proof walkie-talkie should be returned to the factory for re-inspection in time to determine the explosion-proof grade, so as to avoid accidents caused by long-term use and lowering the explosion-proof grade.

3. The products certified by explosion-proof testing institutions shall not be disassembled by themselves in any way. Modifying walkie-talkie will change the original design structure of walkie-talkie hardware. Only the original manufacturer of the product can modify it at the production site certified by the explosion-proof testing institution. Unauthorized modification will invalidate the explosion-proof certification of this product.

4. When the whole machine is charging, the power switch should be turned off, and the call transmission operation cannot be carried out at the same time when charging, so as to avoid accidentally burning out components or batteries.

5. Don't short-circuit the "+"and "-"poles of the battery.

6. When using, do not hold the antenna with your hands or bend it.

? There are many types of explosion-proof walkie-talkies on the market now. When you buy an explosion-proof walkie-talkie, you must explain in advance that it is an explosion-proof walkie-talkie! Bian Xiao has collected several common models of explosion-proof walkie-talkies, which can be used as readers' reference, such as GP328/338 explosion-proof walkie-talkie of Motorola brand, VX-800 explosion-proof walkie-talkie of Vitex brand and so on. Of course, the price of explosion-proof walkie-talkies is very different from that of ordinary walkie-talkies. Of course, what kind of walkie-talkie to buy depends on what kind of industry you are engaged in. There is also a small reminder: before using the explosion-proof walkie-talkie, be sure to read its instructions carefully. If you still don't understand, you can buy it and ask in detail before you operate it yourself.

Ok, today Bian Xiao will give you a brief explanation of what an explosion-proof walkie-talkie is. After reading the above explanation, do you know anything about explosion-proof walkie-talkies? ? Tubatu Online provides you with "every decoration quotation, 1-4 local decoration companies, 3 sets of decoration design schemes" and the decoration pit avoidance strategy for free! Click this link:/Zhu Ye /zxbj-cszy.php? to8to _ from = SEO _ zhidao _ m _ jiare & amp； Wb, you can get it for free ~