What is an explosion-proof elevator and what are the differences between it and an ordinary elevator?

Explosion-proof elevator, as the name suggests, is a kind of elevator with explosion-proof performance. So what is the difference between explosion-proof elevator and ordinary elevator? Generally speaking, the difference between explosion-proof elevator and ordinary elevator is that they use different materials and inspection content, requirements and methods. Explosion-proof elevator manufacturers require more stringent, explosion-proof elevator installation process will be more complex, while the explosion-proof elevator installation qualification requirements will be more stringent.

Flammable and explosive working environment in the installation of explosion-proof elevator, can provide good safety assurance. Explosion-proof elevator types are: traction, forced, hydraulic, of which traction is the most common.

1, the explosion-proof elevator has several levels

Explosion-proof elevator can be divided into three hazardous classifications, respectively, 0, 1 and 2 areas, which represent explosive gases always or for a long time; flammable gases in the normal course of work is likely to occur or exist; in general, there is no still gas, and even if it occasionally occurs, the existence of a very short period of time. Explosion-proof elevator standard should not be less than d (ib) Ⅱ BT4 type grade.

2,explosion-proof elevator and ordinary elevator difference

1) different uses

Explosion-proof elevator is a special explosion-proof function of the elevator, then it is specifically for use in special working environments, such as petroleum, chemical, metallurgical and other industries must use explosion-proof elevator to protect the safety of personnel. Although the ordinary elevator safety, performance and other requirements, but the ordinary elevator installation process and inspection content standards are not as strict as the explosion-proof elevator.

2) different design standards

Explosion-proof elevator standards to focus on its explosion-proof performance and related explosion-proof elevator installation process standards, which is to ensure that a large number of friction is still maintaining a certain degree of reliable explosion-proof performance for the use of combustible gases, vapors and other explosive mixtures of hazardous environments. Ordinary elevator design standards are not so high.

3) the price is different

Explosion-proof elevator price is higher than the price of ordinary elevators, explosion-proof elevator manufacturers installation, design process qualification will be more stringent.

3, the design of explosion-proof elevator to follow the principle

1.1 Reasonability flammable and explosive environment there are many, each with different attributes, so its performance in the explosion-proof elevator requirements are different, in order to be able to maximize the requirements of industrial production to meet the explosion-proof elevator must ensure that the design of the reasonableness of the scientific nature. Simply put, that is, in the actual design of the explosion-proof elevator in the process, the requirements of organic integration with the use of the environment, and also to meet the requirements of material conservation.

1.2 Reliability, stability of the explosion-proof elevator in the flammable and explosive working environment in the actual application, can provide safety for the building, the staff, so, to ensure that the reliability of the explosion-proof elevator itself and the important premise of stability. Relevant units are required to develop a reasonable, comprehensive and effective safety assessment system, system, and requires strict accordance with industry standards for the management of the design work. At the same time, it is required to strengthen the enhancement of the risk of accidents in the early warning mechanism, the explosion-proof elevator in the actual operation of the potential safety hazards, problems and other issues for comprehensive consideration, try to minimize the adverse effects of risk factors. There are many flammable and explosive environments, each with different attributes, so its performance in the explosion-proof elevator requirements are not the same, in order to be able to maximize the requirements of industrial production to meet the buildings, staff to provide security, must ensure that the explosion-proof elevator in the design of the rationality, scientific, reliability and stability.

4, the explosion-proof elevator inspection focus

Electrical equipment belongs to the explosion-proof elevator key functional equipment, such as explosion-proof motors, batteries and circuit breakers and so on. Therefore, the production date of the components, manufacturers, operating parameters and operating strength to do the test, the rationality of the line toward the scientific, whether the wire connectors to meet the explosion-proof standards and other tests. Explosion-proof elevator electrical equipment is generally made of metal shell, which is due to the shell has a good seismic and rigidity, but because of the metal has a strong conductivity, if the occurrence of short circuits, insulation aging will easily lead to open fire, and even lead to an explosion, so be sure to use reasonable and effective way of grounding to do a good job of protection.

5, explosion-proof elevator should pay attention to the use of information

Explosion-proof elevator should be set at the entrance to the obvious position of the “Ex” characters; in the explosion-proof elevator car should be set in a conspicuous position of permanent signs, signs should include: explosion-proof elevator applicable to explosive atmospheres, explosion-proof categories and temperature groups.

Explosion-proof electrical components in the shell should be set in a conspicuous position explosion-proof marking.

Explosion-proof elevator additional technical documents include.

Explosion-proof elevator factory certificate.

Explosion-proof electrical components and detailed list of all explosion-proof electrical components in the list of anti-drying certificate of conformity.

Electrical wiring diagrams, electrical schematic diagrams.

Cable introduction device location map (except for intrinsically safe electrical components).

Installation and maintenance instructions.

6, explosion-proof elevator technical requirements

Explosion-proof elevator manufacturing process is more complex than the conventional elevator, so its inspection, inspection work is also more difficult, the relevant workers should not only master the electrical knowledge, but also to understand the structure of the explosion-proof elevator itself, the operation of the principle of mastering the ability to deal with urgent matters, control the details of the work, to avoid potential safety hazards.

7, explosion-proof elevator installation precautions

Explosion-proof elevator places of use are characterized by high temperature and high pressure, or more toxic media around, explosion-proof elevator electrical parts will be corroded around the normal work can not lead to a serious threat to the operation of explosion-proof elevator safety. Currently in the explosion-proof elevator electrical installation work there are certain technical problems, we must use appropriate measures to solve the installation of the shortcomings of the work, to avoid the lack of protection of the electrical part of the explosion-proof elevator triggered by the operation of the accident. Explosion-proof elevator types are: traction, forced, hydraulic, of which the most common traction. The following will be introduced as an example of traction explosion-proof elevator.

Trailing explosion-proof elevator explosion-proof electrical components are: the main control cabinet, door control box, door motor, fan or air conditioning, safety grids or intrinsically safe power supply, lighting switches or lighting fixtures, junction boxes, junction boxes or junction boxes, power circuits and lighting circuits, circuit breakers, alarms or telephones and so on.