The local coal mine fan should perform the following tasks: 1. Use double circuit power supply and have automatic switching function; 2. Implement lock-in protection for wind power and gas power; 3. Install a wind pressure sensor to; the wind cylinder locking device; 4. The air supply volume of the local fan must meet the minimum air volume requirements required for the excavation working face or tunnel at one end; 5. The installation position of the local fan should be set to air; inlet side more than 10 meters from the return air outlet; 6. A work record plate for equipment servicing, inspection and maintenance should be placed on the local fan; 7. The local fan must be placed on a special rack or bracket, and it is not allowed to place it directlyOn the ground ; 8. The local fan fan must be waterproof, and there are dedicated personnel to inspect and manage each shift. 9. Use special cables, special switches and special transformers. .
Local fans of underground coal mines should at least reach the above points to ensure that personnel working in excavation or single-head tunnels can carry out production work safely and to ensure that toxic and harmful gases in the tunnels will not cause problems. harm the human body, to prevent major accidents from occurring.
What are the regulations for the installation and use of local fans and air ducts in coal mines
Energy-saving generator within reach extended for electric vehicle Niu Mo Wang.
Utility model patent: “A rotor structure of generator". It is a revolutionary invention that changes the internal structure of the generator, adopts the working principle and structural characteristics of the planetary gear, changes the structure of the generator rotor, and also changes the working principle and generator power output. the machine produces electricity
A traditional generator has a stator core, coils and a rotor. When the generator operates, the rotor turns, cutting the coils. in the stator core and current is generated in the coils A strong electromagnetic resistance is generated between the coils of the generator stator core and the rotor. A kind of “electromagnetic damping” phenomenon is formed. that is to say a physical phenomenon of the electromagnetic field produced and consumed by a generator when it produces electricity It will remain respectful of a “Law of conservation of energy” for them.generators. The generator therefore consumes a lot of energy.
This utility model patent: “A Generator Rotor Structure”. It is the “law of conservation of energy” when the generator produces electricity to solve the above problem. The rotor speed is high and the magnetic field resistance is large when the rotor and coil are cut off. It adopts the working principle of planetary gears and uses the mechanical principle "Energy Conversion Law" through mechanical operation. to reduce the rotor speed. Reduce the friction resistance of the electromagnetic field between the rotor and the spool when cutting. Changed the way the cut between rotor and spool works. Simultaneously increasing the number of rotors reduces the rotor speed. Changed how rotors are cut. The electromagnetic friction resistance between the rotor and the coil is reduced. AThe planetary gear and multiple rotor design is adopted. It uses a power generation method of spinning, rolling and cutting coils in the coil. The electromagnetic friction resistance between the coil and the rotor is reduced and the low rotation speed of the rotor is achieved. The frictional resistance of the magnetic field is reduced.
The rotary bearing cutting power generation method is more energy efficient than the traditional power generation method. Can save energy consumption by more than 40%.
This utility model patent: Can be used as a range-extending hybrid generator for electric vehicles. It can also be used for wind, hydro, thermal and nuclear power generation. This is a new type of technologically environmentally friendly, efficient and energy-saving generator. Can achieve. Savesave energy, reduce emissions, increase production and efficiency.
Utility model patent: a generator rotor structure.
Current technology is openly pursued by society: upstream and downstream processing and manufacturing enterprises, as well as R&D teams cooperate in development and production.
Patented: #山西牛魔王Mechanical and Electrical Technology Co., Ltd. #
(1) Local fans must be managed by designated personnel to ensure normal operation.
(2) Local pressure fans and starting devices shall be installed in the air inlet tunnel, and the distance from the return air outlet of the excavation tunnel is not must be not less than 10 m from the supplied air volume; by the total air pressure must be greater than that of the local fan. The volume of air drawn in and the minimum wind speed in the tunnel between the location ofinstallation of the local ventilation fan and the return air outlet must comply with the relevant provisions of article 101 of this regulation. .
(3) Excavation work in high-gas mines, coal (rock) and gas (carbon dioxide) explosion mines, coal roads, rock roads semi-coal and rock tracks with gas gushing in areas with high gas content in low gas mines The normally operating local fan must be equipped with an emergency local fan of the same capacity and capable of automatic switching. Normally operating local fans must be powered by three special devices (dedicated switches, dedicated cables and dedicated transformers). Dedicated transformers can power up to 4 sets of local fans on different excavation work surfaces; be taken from the power source which is powered en the same time. Another power supply, when the normally operating local fan fails, the emergency local fan can automatically start to maintain normal ventilation of the excavation work surface.
(4) Local fans which operate normally in other excavation work faces and ventilation locations do not need to be equipped with emergency local fans, but local fans which operate normally must use three dedicated power supplies or local ventilation; which operates normally The machine is equipped with a local emergency fan of the same capacity and can be automatically switched. The power supply to the normally operating local fan and the standby local fan shall come from mutually independent power sources from different busbar sections which are powered at the same time to garNote that when the normally operating local fan fails, the emergency local fan operates normally. .
(5) Anti-static and flame-retardant hair dryers should be used. The distance between the mouth of the air duct and the working surface of the excavation, the installation of local fans and air ducts for mixed ventilation, as well as the specifications and standards for installation of joints of cross drying for automatic switching between normally operating local fans and emergency local fans shall be determined during operation. This is clearly stated in the regulations.
(6) After the normal operating and standby local fans lose power and stop working, when power is restored, the normal operating local fans and the standby local fans are not allowed to start on their own. et local ventilation must be activated manually.
(7) Locations where local fans are used to supply air must implement a wind energy lockout to ensure that all non-inherently safe electrical equipment in the area of operation Wind stop can be turned off when normally operating local fans stop. works or the wind is stopped from the power supply. If the normally operating local fan fails, turn it off. When switching to the standby local fan, the local fan must stop working within the ventilation range, and troubleshooting can only resume after the fault is eliminated and local ventilation functioning normally; If two local fans are used to supply air at the same time, both local fans must achieve wind power blocking at the same time.
(8) An energy lock testThe methane turbine must be carried out at least once every 10 days, and an automatic switching test between a normally operating local fan and a standby local fan must be carried out every day. should not be affected during testing and test records should be archived for future reference.
(9) It is strictly prohibited to use more than 3 (including 3) local fans to supply air to an excavation face at the same time. It is not permitted to use a local fan to supply air to two working faces simultaneously.