DFB-20-127 (36) Mine Flameproof Solenoid Valve
DFB-20-127(36) Mine Flameproof Solenoid Valve Scope of Application: DFB-20-127(36) Mine Flameproof Solenoid Valve is a flameproof type, marked as: ExbI; suitable for dust in coal mines and Explosive gas occasion; the product can be used with the main body of the belt conveyor protection device, or it can be used alone. It is mainly used for dust reduction, cooling, fire extinguishing and drainage.
DFB-20-127 (36) Mine explosion-proof solenoid valve performance characteristics: use AC power supply, small size, light weight, wide pressure range; power consumption 20VA when using, no need to sprinkle water when no power; when testing When the temperature is higher than the set value, the solenoid valve is automatically opened by the host to realize the sprinkling function.
Technical parameters of DFB-20-127(36) mine explosion-proof solenoid valve
Explosion-proof
Working voltage AC127/36V 50Hz
Applicable pressure: 02~6.0MPa
Opening method: normally closed
Weight: 3Kg
I. Overview of DFB-20-127 (36) Mine Flameproof Solenoid Valve
1.DFB-20-127(36) Mine explosion-proof solenoid valve is a new product developed for the harsh environment of coal mine. It is suitable for allowing methane and coal dust in the surrounding air to not exceed the "Coal Mine Regulations". It is used in mines with specified contents, and is fully open and fully closed for use as water, emulsion, oil, and liquid pipelines with low viscosity, non-flammable, and no suspended matter.
DFB This product strictly complies with GB3836.1-2000 "General requirements for explosion-proof electrical equipment for explosive gas environment", GB3836.2-2000 "Explosion-proof electrical equipment for explosive gas environment" "d"", GB3836.3-2000 Design and manufacture of the "Enhanced Safety Type "e" for Explosive Gas Environments and MT/T715-1997 "General Technical Conditions for Mine Explosion-Proof Solenoid Valves".
Structural Features and Working Principles of DFB-20-127(36) Mine Flameproof Solenoid Valve
1. The DFB-20/4-127 mine explosion-proof solenoid valve is a direct control two-position two-normal closed structure, and the upper part of the valve body is a special electromagnet. As a power source for directly opening and closing the valve. The lower part of the valve body is a valve seat, which is composed of a water inlet, a water outlet, a water guiding valve port and a movable iron core. After being energized, under the action of electromagnetic effect, the movable iron core generates a large enough attraction to overcome the spring and medium pressure, so that the movable iron core is separated from the water guiding valve port, the valve port is opened, and the medium is circulated. Conversely, in the event of a power failure, under the action of the spring and the medium pressure, the movable iron core closes the water conduit and the medium cannot circulate.
2. The DFB-20/4-36 mine explosion-proof solenoid valve can normally open the valve within the nominal pressure range and the flow rate is close to zero or the pressure difference between the inlet and outlet is zero, so the working reliability is high.
3. The inlet of the solenoid valve has a mesh filter, which can effectively block impurities in the medium with a diameter greater than 0.5mm from flowing through the valve body, thereby avoiding harmful effects caused by harmful impurities.
4. According to the user's needs, the solenoid valve can be automatically turned on and off periodically after the AC36V or AC127V power supply is turned on, without the power box and sensor of the control device being omitted. The time of opening and closing can be determined by the user when ordering.
Fourth, DFB-20-127 (36) main technical parameters of mine explosion-proof solenoid valve
1, model: DFB-20/4-127; DFB-20/4-36
2, explosion-proof type: explosion-proof type
3, explosion-proof mark: ExdI
4, rated control power supply voltage: AC (50Hz) 36V, 127V
5, power consumption: ≤ 15W
6, pressure adaptation range: 0-6.0 MPa
7, solenoid valve nominal diameter: 20mm;
8. Dimensions (mm): 110×70×170;
9, weight: 3.3Kg
V. Use environment and working conditions of DFB-20-127 (36) mine explosion-proof solenoid valve
(a) Altitude: 2000m;
(b) ambient temperature 5 ° C ~ 40 ° C;
(c) Ambient humidity: <95% (at 25 ° C);
(d) Medium temperature: ≤ 65 ° C;
(e) It is allowed to be used in mines with methane explosive gas mixtures, methane, coal dust (hydrogen sulfide, carbon dioxide) in the surrounding air, etc., which do not exceed the content specified in the Coal Mine Regulations;
(f) allowed to be used in environments where there is no corrosive metal and damage to the insulating medium;
(g) allow use in places where there is no strong bumps and vibrations;
(h) Allow use where there is no dripping or liquid intrusion.
6. Installation and use of DFB-20-127 (36) mine explosion-proof solenoid valve
1. Strictly according to the voltage level and nominal pressure value of the product, the installation and use location should be free of severe vibration and collision.
2. Check if the fasteners are loose. If loose, tighten them.
3. Check the insulation resistance between the terminal and the outer casing, which shall not be less than 1.5 megohms.
4. Place the product in the place and check whether the opening and closing action is sensitive and reliable. The method is to repeatedly turn on and off the power supply to hear the "beep, bang" sound generated by the moving iron core up and down as normal.
5. When the solenoid valve is connected to the medium pipeline, the direction indicated by the arrow of the valve body should be consistent with the flow direction of the pipeline medium, and the valve body should be kept perpendicular to the ground as much as possible. The valve seat joint should be sealed against leaks.
6. The power supply lead wire is made of rubber cable of Φ10～Φ14. The wiring should be firm and reliable. The compression nut of the bell mouth must be tightened so that there is no gap between the seal ring, the cable line and the inner wall of the inlet port to ensure the explosion-proof performance.
7. The solenoid valve should be reliably grounded.
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Leon Lee
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