What is the explosion proof principle of explosion proof cabinets?

First of all, in order to understand the explosion-proof principle of explosion-proof cabinets, it is necessary to understand from the definition of **. **Refers to the process of energy being converted into energy from concentration and expansion in a short time and in a small space, with strong mechanical effects. It is a very rapid physical or chemical energy release process.

In this process, the matter in space releases energy at a very fast rate and converts it into mechanical energy, light, heat, and other forms of energy. Therefore, once out of control, the accident will have a huge devastating impact.

The most important feature is the sudden change in pressure between the system and the surrounding medium, which is the direct cause of the destruction. When the combustible gas reaches a certain concentration in the air, it will occur in case of open flame**. In daily industrial production, there are generally three situations:

When the combustible gas reaches a certain concentration, the fire and gas are satisfiedTherefore, the explosion-proof cabinet is mainly considered from the following aspects:1. Reduction of combustible concentrations:

Make the concentration of **substance below the **limit**, such as ventilation to prevent gas**, dust removal to prevent flour**. 2.Isolate the source of fire:

Prevent sparks, e.g. with arc extinguishing switches and explosion-proof motors. 3.Blocking the air:

Inert shielding gas is added.

Explosion-proof cabinets store all hazardous chemicals according to different colors. Explosion-proof cabinets come in four colors: yellow, red, blue, and white.

The chemicals stored in each color are different. Yellow indicates flammable liquids, red indicates flammable liquids, blue indicates weakly corrosive liquids, and white indicates strongly corrosive liquids. In this way, hazardous liquids can be effectively identified, deterred and isolated by using explosion-proof cabinets in different colors.

Prevent various chemicals from mixing together and eliminate fire hazards.

The explosion-proof distribution cabinet is an extraordinarily explosion-proof type, and its primary experience is to block the flammable substances from the ignition source to achieve the explosion-proof intention.

The explosion-proof distribution cabinet is welded by castings or steel plates, with high strength, more expensive than ordinary explosion-proof boxes, and is suitable for dangerous combustible gas places and places.

Its explosion-proof principle is mainly to adopt explosion-proof measures to isolate the ignition source of the medium, so as to achieve the purpose of explosion-proof electrical appliances;

There are generally the following three conditions for the occurrence of ** in daily industrial production: 1. Combustible gas reaches a certain concentration 2, meets fire 3, and satisfies the air.

Therefore, the prevention of gas in daily industrial production is mainly considered from the following aspects: 1. Reduce the concentration of combustibles: make the concentration of combustibles less than the limit, such as using ventilation to prevent gas and dust to prevent flour; 2. Isolate the fire source

Prevent sparks, such as using arc extinguishing switches, explosion-proof motors, anti-static clothing, installing flame arresting covers, controlling ignition sources, etc.; 3. Blocking air: such as adding inert shielding gas.

If the generation of ** must start from the three necessary conditions, and limit one of the necessary conditions, it will limit the generation of **. Explosion-proof cabinets start by isolating the source of fire and blocking the air. First of all, the explosion-proof cabinet is classified and placed by different colors, and the explosion-proof cabinet has four colors yellow, red, blue, and white, and the chemicals stored in each color are different.

Yellow for flammable liquids, red for flammable liquids, blue for weakly corrosive liquids, and white for strongly corrosive liquids. In this way, hazardous liquids can be effectively identified, sorted and isolated by using explosion-proof cabinets of different colors. Prevent items that are prone to various chemical reactions from mixing together, and eliminate the hidden dangers of the items themselves.

In addition, in terms of material and safe use, the explosion-proof cabinet adopts a double-layer structure, high-quality cold-rolled steel plate, phosphating treatment, epoxy resin painting, and high-temperature curing. The bottom is designed with an anti-leakage threshold to retain the leakage liquid. There is a 50mm high leak-proof tank at the bottom of the cabinet so that the liquid that accidentally flows out does not spill.

The laminate is made of galvanized laminate, surface phosphating treatment, epoxy resin painting, high temperature curing, and unique safety corner design. The height of the laminate can be adjusted every 60mm distance according to the 2mm thickness component, which is very flexible and convenient. The use of silicate has the functions of heat insulation, sound insulation and explosion-proof, and is used as an explosion-proof component of explosion-proof cabinets.

According to the latest measures for the management of hazardous chemicals that are easy to make explosives (national standards), the GA cabinet lock equipped with 3-point linkage type, equipped with two keys, the connection between the cabinet door and the cabinet body adopts a long row of hinge hinges, which can be opened and closed at 180 degrees, and the operation is quite convenient and safe. In this way, it can effectively isolate the external air and fire source, and achieve the effect of blocking and explosion-proof.

The principle of explosion-proof cabinet explosion-proof is to achieve fire and explosion prevention in industrial production and life from the above two points. Of course, in order to truly and completely cut off the hidden dangers of fire and safety, we also need to have a standardized operation concept and a vigilant safety awareness at all times, and eliminate potential safety hazards from the source of our thoughts.

Explosion-proof cabinets can place different items according to the color:

The red cabinet is generally used to store flammable liquids: such as hydrogen, carbon monoxide, methane, propane, ethylene, etc.

The yellow cabinet is generally used to store flammable liquids: such as alcohol, glue, gasoline, kerosene, **, ethanol.

Benzene, sulfur, nitrocellulose, Tianna water.

Wipe machine water, etc. The blue cabinet is generally used to store weakly corrosive liquids: such as sulfuric acid and sodium hydroxide.

Bleach, net washing water, formaldehyde, etc.

Explosion-proof cabinet is an important member of laboratory furniture, explosion-proof cabinet is mainly used in hospitals, enterprises, industries, laboratories, schools and other places, is an important safety protection equipment to protect experimental reagents and experimental personnel. There are three main colors of explosion-proof cabinets: red, yellow and blue, and different colors represent different use classifications. Generally, yellow explosion-proof cabinets are used to store flammable liquids.

Red explosion-proof cabinet: used to store flammable liquids; Blue explosion-proof cabinet: used to store weakly corrosive liquids;

When the situation is to keep important items, that is, to prevent the violent opening of the cabinet.

Explosion-proof cabinets safely store hazardous chemicals to reduce the risk of fire while protecting staff and equipment;

Explosion-proof cabinet is a kind of safety equipment used to store flammable and explosive materials, and in order to ensure the safety of personnel and the environment, explosion-proof cabinets need to be controlled. The following are some control measures for explosion-proof cabinets:

Periodic Inspection: Regular inspection and maintenance of explosion-proof cabinets to ensure their proper working and use. The inspection content includes the environment, ventilation, equipment status and so on inside the explosion-proof cabinet.

Strict access management: A strict management system should be set up for the import and export of explosion-proof cabinets, including entry and exit records, authorization management, personnel restrictions, etc.

Labeling: The exterior of the explosion-proof cabinet should be marked with obvious signs, indicating the name and characteristics of the stored items, and should meet the standards stipulated by the state.

Good ventilation facilities: The explosion-proof cabinet should be equipped with good ventilation facilities to ensure the circulation of air flow in the cabinet and avoid the danger caused by gas accumulation.

Regular cleaning: Regularly clean the explosion-proof cabinet to remove dust and debris, etc., and keep the cabinet clean and tidy.

Waste disposal: Waste or invalid items should be disposed of in accordance with national regulations, and should not be thrown away or mixed with other items.

There are two working principles of explosion-proof positive pressure cabinets.

The working principle of explosion-proof positive pressure cabinet is a special explosion-proof form, which is mainly to isolate flammable substances from the ignition source and operate the explosion-proof effect. The specific operation method is to combine the control system in the positive pressure cabinet with the gas system to pass the protective gas from the safe area into the positive pressure chamber. After thoroughly cleaning and replacing the flammable gas in the positive pressure chamber, a certain working pressure is maintained in the positive pressure chamber, and the flammable gas in the external dangerous environment is intercepted, and the conductive smoke and dust enter to achieve the explosion-proof effect.

According to the working pressure maintenance method in the positive pressure chamber, it can be divided into two types of methods: positive pressure with diluted airflow and positive pressure with leakage compensation;

Explosion-proof positive pressure cabinet.

The former is by continuously flowing into the positive pressure chamber by shielding gas, and maintaining a certain flow rate, so that the working pressure of the positive pressure chamber is maintained within the working pressure range, and the gas in the positive pressure chamber can be continuously cleaned and replaced. Considering that the shielding gas continuously flows into the positive pressure chamber, it can also take away the heat generated by the operation of the internal structural elements in order to achieve the explosion-proof standard, so it is more suitable to be used in the installation of some electrical parts with relatively large heat generation as slag or equipment. The disadvantage and disadvantage is that the required air flow is relatively large, and the customer's on-site air source needs to supply sufficient flow and working pressure.

The latter is monitored by the control system in real time to monitor the working pressure of the positive pressure chamber, and the protective gas flow is controlled with the help of a solenoid valve. When the working pressure of the positive pressure chamber is too low, open the inlet valve to replenish the air; If the working pressure is too high, open the exhaust valve to exhaust the air. Considering that the shielding gas does not flow continuously, the positive pressure casing with leakage compensation is suitable for low-voltage electrical components with small heat generation of the device, such as various electrical control systems.

According to the national standard, the explosion-proof positive pressure cabinet also needs to be equipped with interlocking and alarm functions. When the ventilation of the inner cavity is not completed or is not in the normal range, it cannot be powered to ensure safety. When the working pressure in the operating cavity exceeds the preset alarm limit range, the control system needs to be adjusted as soon as possible, and an audible and visual alarm is issued.

If the adjustment countermeasures are ineffective, the system should be disconnected as soon as possible and stop operation.

Explosion-proof positive pressure cabinet is a special equipment used to protect electrical equipment, instrumentation and other precision equipment

1.Positive pressure air supply: The explosion-proof positive pressure cabinet is introduced into the cabinet by introducing compressed air or nitrogen and other gases to form a high positive pressure state, so that the air in the cabinet will not be mixed into the outside air, so as to avoid the best substances from the outside from entering the cabinet.

2.Pressure stability control: The explosion-proof positive pressure cabinet is equipped with a pressure stability control system, which can control and adjust the positive pressure state in the cabinet to ensure that the positive pressure state in the cabinet is always in a stable state to achieve the best protection effect.

3.Pressure relief protection: The explosion-proof positive pressure cabinet is also equipped with a pressure relief protection device, when the internal pressure is too high, the pressure relief device can be automatically opened to discharge the excess gas, so as to avoid the danger of the cabinet caused by excessive internal pressure.

4.Explosion-proof materials: The shell and internal components of the explosion-proof positive pressure cabinet are made of special explosion-proof materials, which can effectively prevent the damage of dangerous substances such as debris and sparks generated by the cabinet body to the surrounding environment and personnel.

To sum up, the working principle of the explosion-proof positive pressure cabinet is mainly to ensure that the equipment in the cabinet can be effectively protected when the external environment occurs, so as to ensure the safety of equipment and personnel.

First, the use of shell limited to the liter system**: gap flameproof.

2. Limit the ignition source energy: control the electrical parameters.

3. Use additional measures to improve the safety of equipment: increase the electrical grip gap, strengthen the electrical connection, etc.

4. Isolate the ignition source with a shell or medium:

Limit the breathing shell.

Anti-mold skin dust shell.

Hermetically sealed housing. Isolate with protective solution.

Isolate with granular fillers.

Isolate with a pant.

Isolated with air or inert gas.

That's what the following year's Ganquan type seal signal considered.

Explosion-proof cabinet refers to a special safety cabinet used to store flammable, explosive, harmful, corrosive and other dangerous goods. Typically, an explosion-proof cabinet refers to a piece of equipment, not a separate cabinet. Explosion-proof cabinets are usually composed of cabinets, doors, locks, ventilation brigade devices, explosion-proof lights, etc., and their main role is to prevent the leakage of dangerous goods, accidents such as accidents, and ensure the safety of the workplace.

There are many types and specifications of explosion-proof cabinets, and different explosion-proof cabinets can be selected according to different dangerous types and storage requirements. When using explosion-proof cabinets, it is necessary to pay attention to their use and maintenance to ensure that they play a long-term and effective role in dismantling cherry blossoms.