Details of the explosion proof control box, what is the explosion proof box

The explosion-proof version is IP65 rated. It is suitable for flammable and explosive occasions (coal mines. Chemical industry. Petroleum. power and other industries), Ann.

High full coefficient, strong operation function, stable performance, etc.

There are two kinds of explosion-proof products: DI and DIIBT4, DI is suitable for non-mining faces in coal mines; DIIBT4 is used in factories and is suitable for the most advanced gas mixtures in the environment of IIA, IIB class T1 T4 group. The performance of this product conforms to the provisions of JB T8528-1997 "Technical Conditions for Ordinary Valve Electric Devices". The performance of the explosion-proof type meets the provisions of the General Requirements for Explosion-proof Electrical Equipment for Sexual Environments and the Technical Conditions of Flameproof Control Box of JB T8529-1997.

And by the National Explosion-proof Electrical Products Testing Center verification, obtained the explosion-proof certificate and mining certificate. The integral electrical part is mainly composed of multi-function module MK1, remote control module MK2 button box indicator, opening meter, contactor, etc. The multi-functional module MK1 is composed of three parts: phase identifier XS, contactor interlock protector HB and DC power supply DC.

The remote module MK2 consists of four solid-state relays and three DIP switches. The overall regulating electrical part consists of a regulating module TMK, a contactor, etc. The control line is 220V, 50Hz (special order 60Hz); Remote control for etc.

Dongshan Electric provides control box, which mainly includes a lighting distribution box for controlling the lighting system and a power box for controlling the power system. Most of these products are combined, up to 12 circuits can be controlled, and most of their shells are made of cast aluminum alloy materials, some of them are welded steel plates, and a small part of them are insulating material shells. Its interior is mainly composed of circuit breakers, contactors, and thermal relays.

Transfer switches, signal lights, buttons and other components are composed, and the manufacturer can also choose to equip them according to the needs of users. Explosion-proof up to CT6.

There are many subdivision names of explosion-proof boxes, generally explosion-proof distribution boxes, explosion-proof control boxes, explosion-proof distribution cabinets, etc., which can be called explosion-proof boxes.

Legal analysis: explosion-proof distribution box is a type of distribution box with explosion-proof performance. There are mainly explosion-proof lighting distribution boxes, explosion-proof power distribution boxes, explosion-proof and anti-corrosion distribution boxes, etc.

BXM(D) explosion-proof distribution box is suitable for power wiring in flammable and explosive places such as petrochemical plants, petroleum platforms, chemicals, pharmaceuticals, coal, smelting, shipbuilding, military industry, textiles, etc. Zone 1 and Zone 2 ** gas environment. 20, 21 and 22 combustible dust environments.

Legal basis: Fire Protection Law of the People's Republic of China

Article 1: This Law is formulated so as to prevent fires and reduce fire hazards, strengthen emergency rescue efforts, protect the safety of persons and property, and preserve public safety.

Article 2 The fire protection work implements the principle of prevention first, prevention and elimination combined, and implements the fire safety responsibility system in accordance with the principle of unified leadership, supervision by the department according to law, full responsibility of the unit, and active participation of citizens, and establishes and improves the socialized fire protection network.

Article 5 All units and individuals have the obligation to maintain fire safety, protect fire protection facilities, prevent fires, and report fire alarms. All units and adults have the obligation to participate in organized firefighting work.

Article 7 The State encourages and supports scientific research and technological innovation in fire protection, and promotes the use of advanced fire protection and emergency rescue technology and equipment; Encourage and support social forces to carry out fire protection public welfare activities. Units and individuals who have made outstanding contributions to fire protection work shall be commended and rewarded in accordance with the relevant provisions of the State.

Article 10 For construction projects that need to carry out fire protection design in accordance with the national fire protection technical standards for engineering construction, the fire protection design review and acceptance system for construction projects shall be implemented.

Article 14 The specific measures for fire protection design review, fire protection acceptance, filing and random inspection of construction projects shall be prescribed by the competent departments of housing and urban-rural construction.

As the name suggests, it is an electrical product used in dangerous places to prevent itself from becoming a ignition source to ignite flammable and explosive products, mainly explosion-proof lighting distribution box, explosion-proof power distribution box, explosion-proof and anti-corrosion distribution box, etc.

Explosion-proof distribution box.

Pharmaceutical, knitting factories, food processing factories, etc. There will be flammable and explosive gas mixtures or smoke and dust overflow in the company's manufacturing work, and when the flammable and explosive gas touches the ordinary lighting distribution box, it is easy to cause the occurrence of ****, endangering the life safety of manufacturing and employees, so it is necessary to install explosion-proof electrical equipment in this place.

How to correctly operate and maintain the explosion-proof distribution box to ensure the safety factor?

1. In terms of the occurrence of first-class control, the stability of the explosion-proof distribution box machinery and equipment is very important: in actual operation, in order to avoid the occurrence of first-class and prevent damage to the production equipment, protective maintenance should be carried out. When carrying out overhauls, components produced from materials that meet the standards need to be installed in the proper way.

The maintenance procedure process itself must not lead to fire accidents and occurrences**.

2. The adverse effects of this change on all equipment should be evaluated: subtle changes on the surface are likely to lead to unimaginable and impermissible deflagration risks. In a French chemical company, a temporary bypass with a diameter of 500 mm was installed in order to better replace the leaking reactor.

Folded pipeline, because of the safety accident of this pipeline, led to the occurrence of the first disaster.

3. The wiring of the explosion-proof distribution box is neat, and there is no twisting condition. The transmission line is closely connected, does not hurt the copper wire, continues to strand, the cross-sectional area of the wire pressed on both sides of the screw under the sealing ring is the same, the transmission line connection on the same terminal is not more than 2, the anti-loose washer and other parts are complete, and the transmission line is closely connected. In the lighting box, the neutral line (N) and the protection zone line (PE line) are set respectively.

The busbar, the neutral line and the protective ground wire are discharged through the bus. Vertical angle of explosion-proof distribution box: shell height below 50cm, allowable error; The height of the shell is more than 50cm, and the allowable error is 3mm.

4. The button posture in the explosion-proof distribution box is flexible and reliable, and it contains a leakage protector.

The control loop: the current amount of leakage protection switch does not exceed 30mA, and the action time shall not exceed. The alloy structure of the explosion-proof distribution box must be reliable for the grounding device (PE) or zero connection (PEN); Openable doors equipped with electrical appliances are connected to the terminals of the structure using bare braided copper wires and are marked.

Have a sense of safety precautions at work and follow the operating procedures.

5. The explosion-proof distribution box needs to be waterproof, rainproof and anti-fouling: explosion-proof distribution box and switch box.

The electrical appliances inside must be reliable and intact, and it is forbidden to apply damaged, but not the explosion-proof distribution box of electrical appliances. It should be set according to the classification of the total explosion-proof distribution box - sub-explosion-proof distribution box - switch box, and the secondary leakage protection should be implemented. The inlet and outlet lines of the explosion-proof distribution box and switch box shall not bear the action of external force, and it is forbidden to contact with the sharp fracture surface of the metal and strong corrosive substances.

There is a safe distance between the explosion-proof electrical equipment in the internal structure. The service life of the rubber outside the cable will change under different application conditions, so if you see an abnormality, you can replace it if you want to change it, and you should overhaul it.

What are the regulations on the management of explosion-proof boxes? Hello back to Zheng, for you to inquire 1It is stipulated that in some construction sites, the leakage protection switch needs to be set in the lighting distribution box, and the head of the composite line of the leakage protection switchgear needs to be placed.

2.There need to be more than 2 people around the distribution box, and no items can be stored around the distribution box, so as not to hinder the distribution operation and maintenance of the electrical box. 3.

The distribution box should be installed in a relatively dry and well-ventilated place. It should not be installed in some flammable and explosive gases, liquids, and some places that are easy to evaporate. It should not be installed in some places that are susceptible to impact, or susceptible to strong finches**, and cannot be placed in places where it is baked.

4.The distribution box and leakage switch box required by the on-site situation and the distribution site need to be set up with a leakage protection switch of more than 2p, and the rated action current and rated action time of the leakage protection switch need to be reasonably matched, and the protection functions at all levels need to be provided. 5.

The main contents of the explosion-proof cabinet manual:

1. The explosion-proof cabinet includes the cabinet body and accessories.

Cabinet models are 4 gallons, 12 gallons, 22 gallons, 30 gallons, 45 gallons, 60 gallons, 90 gallons, and 110 gallons. The accessories are: 1 ziplock bag, 1 wire, 1 manual, 1 2 shelves, 2 keys, 1 pair of operating gloves, and 1 certificate.

2. Items generally stored in explosion-proof cabinets.

Explosion-proof cabinets generally store flammable and explosive liquids. Such as Tianna water, white electric oil, oleacein, etc., because these dangerous chemicals are generally easy to volatilize, when the concentration of these gases in the explosion-proof cabinet is too large, it is easy to cause fire, ** and other safety accidents.

3. Store different items according to the color of the explosion-proof cabinet.

Yellow explosion-proof cabinet: used to store flammable liquids;

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

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

4. About the grounding of explosion-proof cabinets.

Liquids cannot be dispensed into containers unless the nozzle and container are electrically connected to each other. This chapter is considered to have been complied with when the metal base plate under the container is electrically connected to the filling body at the time of filling or when the filling body is connected to the container by a connection line in the filling operation procedure.

5. The use of electrostatic clamps for explosion-proof cabinets.

Remove the screws at the bottom of the cabinet Install the electrostatic clamp to the cabinet with the removed screws Clamp the chuck of the electrostatic clamp on the grounding pile.

6. Precautions for the placement of explosion-proof cabinets.

Cabinets must be placed indoors. The cabinet must be placed horizontally for the cabinet to open and close properly. Vent covers are used to isolate the inside and outside of the cabinet and can be removed according to local regulations. When lifting the goods and moving the container, do not place your hands under the cabinet.

7. Precautions for using explosion-proof cabinets to avoid disasters.

One of the main causes of disasters is improper storage and handling of flammable liquids and chemicals, in your workplace, it is important to confirm and classify chemicals, for the different characteristics of each chemical, check the Chemical Safety Data Sheet (MSDS) to determine its characteristics and storage points, in order to avoid harmful gases, prevent fire and **, it is particularly important to store incompatible chemicals separately, some local codes require the installation of ventilation equipment at the storage equipment, The explosion-proof and fire-proof safety cabinet I provided is equipped with fireproof ventilation holes. The product meets the requirements for the design, construction and capacity of safety cabinets for combustible or flammable chemicals as mentioned in Chapter 2000 of the NFPA.

Explosion-proof control cabinet is often used in some flammable and explosive dangerous places, because the explosion-proof control cabinet has a good protective effect, so the use of explosion-proof control cabinet reduces the occurrence of dangerous conditions such as **, combustion, etc., and also ensures the safety of staff. Then, how to install, debug and maintain the explosion-proof control cabinet, we need to pay attention to the following points:

1. The installation and commissioning personnel should first read the random drawings and technical data in detail, carry out the handover test procedures for the electric heating control cabinet according to the national standards and specifications, and operate and debug it in strict accordance with the requirements.

2. When installing, the floor-mounted type should have a firm installation foundation, the hanging type should be firm and vertical, and the shell should be reliably wired, and the grounding resistance should be 10.

3. The load area of the power cord and load wiring of the control cabinet shall not be less than the data specified in the manual of the electric heater equipment.

4. At the connection between the power cord and the load and the terminal block in the cabinet, the crimping wire nose should be made at the conductor end, and it is strictly forbidden to take multi-strand wire direct connection.

5. The incoming wire under the suspended control cabinet should be tied at the retainer with a material belt. The conductor fits tightly with the inside of the retainer.

6. Check whether the crimping points of the bolts of each circuit are loose and overheated regularly.

7. The distance between the electric control cabinet and the storage place of combustible substances should meet the requirements of relevant specifications.

8. After the wiring is confirmed, the power supply is turned on, the power indicator light is on, the control circuit switch is rotated, and the temperature reading appears on the temperature display, and the green light of the over-temperature controller is on at this time, indicating that the instrument part is working normally.

9. The technical personnel shall adjust the temperature setting value according to the process requirements with reference to the random technical data, and other personnel shall not adjust it at will.

10. The temperature regulator has high sensitivity and poor anti-interference, so remember to choose a cable with a shielding layer and do a good job of shielding and grounding when installing the signal line, so as to avoid interference and disorder. Be careful not to lay parallel to the power cable for long distances.

11. Warn users: operation and maintenance personnel must strictly follow the operation instructions in the random electrical schematic diagram to protect the normal operation of the equipment.

12. Check whether the installation of electrical control system, instrument and instrument meets the requirements: whether the display and control procedures of each alarm device and control system are correct and meet the requirements of process heating. Check whether the two-ground interlock control of the electric heater is correct.

Check whether the connection at the end of the electric heating furnace is firm to prevent loosening and ignition.