█ application scope of upper and lower type stainless steel explosion-proof positive pressure cabinet
1. It is suitable for hazardous areas of zone 1 and zone 2 in explosive gas environment;
2. Suitable for IIA, IIB, IIC explosive gas environment;
3. It is suitable for combustible dust area 20, 21 and 22;
4. Suitable for temperature group T1-T6;
5. This product is suitable for petrochemical, offshore drilling platform, metallurgy, medicine, light industry, textile, wine making, paint, coating, food, biological engineering, aerospace engineering and military facilities;
Upper and lower stainless steel explosion-proof positive pressure cabinet
█ features of upper and lower type stainless steel explosion proof positive pressure cabinet
1. The shell of the product is welded with high-quality steel plate or stainless steel, and the surface is sprayed with electrostatic powder after high-speed polishing, with beautiful appearance;
2. This product is an improved explosion-proof product of "Zhongtong electrical appliance". According to the user's requirements, it can install various common detection instruments, analysis instruments, display instruments, transformers, soft starters, frequency converters, PLC, various buttons, switches, micro-computer touch screen and ordinary electrical components, which are completely unlimited for users to install electrical components;
3. Diversified design, including cabinet type (upper and lower form, left and right form), wall hanging type, piano table type, plane type, etc;
4. The power distribution cabinet is composed of cabinet body, control system, air distribution system, alarm system and power distribution system; the explosion-proof components of some control systems and the power distribution system components of users are installed in the positive pressure chamber (split type or online type can be customized according to customer requirements);
5. The air intake mode of the left and right cabinets is ventilation type, i.e. continuous gas supply. The working heat of the components installed in the positive pressure chamber can be taken away with the gas path, which has good heat dissipation effect.
6. This product is designed, manufactured and inspected according to gb3836.1-2000, gb3836.5-2004 and relevant standards.
Under the control of the automatic control system, the positive pressure cabinet is filled with protective gas, and the pressure in the positive pressure chamber is higher than that outside the positive pressure chamber, forming a small safe environment with micro positive pressure, thus preventing the combustible dangerous gas from entering the positive pressure chamber and ensuring the safe operation of the internal ordinary instruments and electrical components.
7. The automatic control system mainly completes high-end functions such as air exchange, air supplement, ultra-high pressure automatic alarm and exhaust, air pressure alarm, low-voltage interlocking power-off and other high-end functions.(the positive pressure cabinet has the function of low-voltage interlocking, when the pressure is lower than the specified value (50pA), the power distribution of users in the positive pressure chamber will be automatically cut off);
8. External protective door can be installed according to customer requirements, which can display the display or action of internal control part;
9. All fasteners are made of 304 stainless steel with strong corrosion resistance;
10. Wiring mode, steel pipe or cable, explosion-proof hose can be used;
11. It can be customized according to user's requirements;
█ technical parameters of upper and lower type stainless steel explosion proof positive pressure cabinet
Main switch current: 10a-800a; branch switch current: 1a-630a;
Protection grade: IP54 / IP55 / IP65;
Thread specification: DN 15-dn 100 / G1 / 2-g4 inch
Lead in wire specification: diameter: 6mm-80mm; outlet wire specification: diameter: 6mm-80mm;
Lead in and lead out direction: up in, up out, down in and down out (unlimited according to customer requirements)
Function introduction of upper and lower type stainless steel explosion-proof positive pressure cabinet:
The positive pressure explosion-proof distribution cabinet is a kind of positive pressure explosion-proof cabinet specially designed for zone 1.2. Compared with PX series, PZ series omits the safety device for checking the air change time, and only marks the time of air exchange, which is carried out by the user according to the requirements before the main chamber is powered on; in addition, when the internal air pressure is lower than 100Pa, the automatic control system will alarm automatically, and when the air supply is successful, it will automatically return to normal, and if it fails, it will return to normalWhen it drops to 60Pa, the system will cut off power automatically and give an intermittent alarm.
When the air pressure is higher than 800pa, the automatic control system will not be damaged when the air pressure is higher than 800pa.
When the air pressure is lower than 100Pa, the automatic control system will alarm automatically and adjust the internal pressure. When the air supply is successful, it will return to normal automatically. If it fails, the internal air pressure will drop to 60Pa. If necessary, the system can be automatically cut off.
2. The product is equipped with air exchange chain. Before the product is put into operation, only after the air exchange in the main disk cavity and reaching the specified air change time and volume, can the secondary panel be powered on by ensuring that the flammable and explosive gas is blown out of the main panel, and the air pressure in the main chamber is detected to ensure that the electrical components have been effectively isolated by clean media when the product is put into operation.
3. Only when the air pressure in the main panel meets the specified air pressure requirements, the automatic power supply switching system in the auxiliary panel will supply power to the main chamber.
4. The working pressure in the main panel is 100Pa ≤ P ≤ 800pa.
5. The automatic control system of the auxiliary panel is continuous monitoring and displays the pressure parameters of the main panel
Features of positive pressure down stainless steel cabinet
1. It can be divided into ventilation type and compensation type according to air intake mode.The ventilation type is continuous air supply, and the working heat of the components installed in the positive pressure chamber can be taken away with the gas path, which has a good heat dissipation function, which is suitable for solving the heat dissipation problem of high-power explosion-proof frequency converter; the compensation type is intermittent gas supply, and the positive pressure chamber should have good sealing performance to ensure low air consumption.
2. The user must provide gas source, the requirements are: purified air or nitrogen, the gas source pressure is 0.2 ~ 0.8MPa; generally, the instrument air on the user's site can meet the requirements.
3. Zhongtong explosion-proof positive pressure explosion-proof distribution cabinet is mainly composed of cabinet body, automatic control system, air supply system, alarm system and power distribution system; the cabinet body is composed of positive pressure chamber and auxiliary chamber, the positive pressure chamber is equipped with distribution system components of users, and the auxiliary chamber is equipped with automatic control system.
4. The cabinet type products adopt GGD or German process cabinet frame, the main and auxiliary panels are of left and right structure, cable trench seat installation, lower incoming line, front door operation, rear door maintenance.
5. Box type products adopt high-quality steel plate welding structure, the main and auxiliary plates are up and down structure, hanging installation, lower incoming line, front door operation and maintenance.
6. High quality steel plate folding and welding is adopted for the piano table products. The main and auxiliary discs are of front and rear structure, with seat type installation, lower incoming line, piano table operation and rear door maintenance.
7. Steel plate material is generally gb710-88 cold rolled steel plate, and gb3280-84 stainless steel material can be selected according to user requirements.