Mining explosion-proof electric gate valve
KZ941H-64C
The explosion-proof electric gate valve for mining is specially designed for flammable and explosive environments such as coal mines, and has the characteristics of explosion prevention, safety and reliability, and remote control. The core technologies and application points are as follows:
1、 Core features and technical parameters
Explosion proof performance
Explosion proof type: Explosion proof type, marked as "Exd Ⅰ Mb", suitable for coal mine gas environment.
Protection level: IP68, capable of withstanding explosive gases (such as IIA, IIB level T1 to T4 groups).
Explosion proof shell: Made of high-strength and corrosion-resistant materials, it isolates electrical sparks from contact with explosive gases.
驱动与控制Drive and Control
Driving mode:
Electro hydraulic control: The electric motor drives the oil cylinder to achieve linear motion, avoiding the problem of overload and valve stem deformation of traditional electric gate valves. It has high integration and simple control.
Intelligent electric: supports switch type or adjustable type, with 485 communication interface, can be connected with PLC system to achieve remote centralized control.
Control box:
Split type: It needs to be equipped with a mining explosion-proof control box (such as KXB series) for valve opening and closing, adjustment, and remote control.
Integrated: Integrated explosion-proof electric device (such as ZJK/ZBK type), non-invasive design, reduces cable layout, and is easy to install.
Key design advantages
Sealing and Structure:
Double gate with universal top structure, automatically adjusts the sealing surface fit to ensure zero leakage; The sealing surface of the valve seat is made of cobalt chromium tungsten hard alloy, which is wear-resistant and corrosion-resistant.
The valve stem is treated with nitrogen infiltration for abrasion and corrosion resistance.
Security protection:
Mechanical+proximity switch dual limit to prevent water hammer and wedging phenomenon.
Torque control mechanism and overload protection to prevent motor damage.
Main parameters
Power supply voltage: AC380V/660V/1140V (suitable for coal mine power grid).
Material options: cast iron, ductile iron, stainless steel, chromium molybdenum steel, etc.
Nominal pressure: PN16~PN320 (covering low to high pressure scenarios).
2、 Typical application scenarios
Underground coal mine: drainage system, gas pipeline, ventilation system.
Flammable environment: Factory gas pipelines, chemical medium transportation (requiring dIIBT4 explosion-proof rating).
3、 Selection and installation precautions
Certificate requirements: A Coal Safety Certificate (MA certification) must be provided before it can be used in coal mines.
Debugging requirements: For initial installation, manually open the valve to the half open position to prevent damage to the equipment due to motor phase sequence errors.
Valve adaptation: In addition to gate valves, butterfly valves, ball valves, etc. can be extended and controlled through gearboxes.
适配阀门：除闸阀外，通过变速箱可扩展控制蝶阀、球阀等。
