1. It is necessary to carefully check the roof of the transportation line, the situation of the coal gang, and find hidden dangers in time. The shed beam used must be drilled with a column or mast to clean up the floating coal and debris in the roadway. 2, the working surface of the work surface should be put the coal to help the column, back good, such as the top plate is not good to maintain small materials, the bracket must be good. 3, slip on the clean, so that it is unimpeded. 4, check the use of equipment in good condition, especially the sound and light signals should be sensitive, complete and reliable. Operators must be certified to work and concentrate. 5. Set up the person in charge of sending and receiving electricity. Second, the transportation of components The transportation of components is strictly carried out in accordance with the "Safety Technical Measures for the Transportation of Work Faces and Return Airways". Third, lifting The lifting objects are strictly implemented in accordance with the "Safety Technical Measures for Object Lifting". Fourth, dismantling, overhaul and installation 1. It is strictly forbidden to carry out electricity operation for equipment such as repairing or replacing the motor, and carefully implement the system of power-off and power-off. 2. Dismantle and install in order. It is strictly forbidden to extend any part of the body into the butt joint of the part. 3. When replacing, all personnel must obey the command, and the person in charge is responsible for safety. 4. If there are any parts that cannot be removed, it is strictly forbidden to use the gun. Fifth, deal with work slippery, broken chain accidents. 1. Before handling the slippery way and breaking the chain, the switch control handle must be hit to zero position, so that the starter is in a power outage state, and the power-off card of “someone works, no power transmission†is hung to ensure that others cannot be mistakenly sent. Electricity. 2. Carefully check whether the roof and coal wall of the sling are safe and reliable. It is necessary to select the roof to be stable, and there is no place to help the dangerous place to hang the slipper. If the top plate is broken, it is strictly forbidden to carry out the downswing. 3. When the shovel is lifted to the required height, it must be supported by a special person with a road or a column cap to ensure that it is firm and reliable. The road used must not exceed two floors. The cap "well" type support pad shall not exceed 3 layers at most, and the spacing of the support pads shall not exceed 3 meters. After the support, it shall be slowly slid. This work is carried out under the supervision of a dedicated person, from lifting, supporting, to sliding. It is strictly forbidden to extend any part of the body under the slip when laying the material. 4. After the slipper confirms that the support pad is in good condition, the large chain at the drop can be pulled out with the tool, the scraper is removed, the horseshoe screw is put on, and the big chain is put on the road. When dragging the chain or removing the scraper, it is strictly forbidden to extend any part of the body into the bottom of the chute. 5. Before opening the shovel, clean up the debris on the top and bottom of the chute, and do not mix the chain. Personnel should be sent to a safe place before they can send electricity. Use the signal to contact the jog, then open the big chain to the upper slot and scrape the scraper. Sixth, after the completion of the test Before the test, a thorough inspection is required. Check the oil level on the gear unit and clean it. After confirming the error, you can send the power to test the vehicle. After no problem, remove the wood from the support slip, and then carry out the load test, and the rear can be closed. 7. The following provisions shall be imposed for the power transmission: 1. The person in charge of power transmission will power off and lock the switch, and will be sent to the special person for care (stopping the operator). 2. The person in charge of the power transmission can only start work after arriving at the work place. 3. The operator who stops the power transmission only obeys the power-off work instruction of the person in charge of the power transmission. 4. The person in charge of power transmission and delivery must send a power-off work order to the power-sending operator in writing, and it is strictly forbidden to call and stop sending power. 5. Other strict implementation of the Mine Regulations on Underground Power Transmission and Management.
The fluorinated mica crystals have very good
high temperature resistance, corrosion resistance and light transmission
properties, and can work for a long time at a high temperature of 1100°C.
No reaction occurs
with strong acids and alkalis; complete light transmittance (pure and
transparent). The natural mica plates traditionally used in the observation
window of high-pressure boiler water level gauge are all brown, and the light
transmittance is not good, and the temperature resistance is in the range of
200-700°C, especially the corrosion resistance is poor. The boiler steam drum
water in thermal power plants contains alkali. After reacting with natural mica
and alkali, it is washed with hot air and hot water, and it is prone to
fluffing, scaling, and being broken. In the short term (about 1-2 months), the
water level is not clearly understood. After being broken, it can easily cause
leakage. The fluorite mica does not react with the acid-base solution, and does
not react with water in the hydration reaction, so that it does not form a
layer, does not scale, and does not break. In the long-term (2 to 3 years)
scouring of high-temperature and high-pressure water (including acid and
alkali), the original clarity and transparency can still be maintained. In
China, it has been widely applied to the observation window of steam boiler
water level gauge in high-pressure boilers of thermal power plants. It has also
been selected by Japanese BBK company and NDK (Colin) company for the
observation window of high pressure boiler drum level gauge.
High Temperature Mica Gasket,High Temperature Gaskets,High Temperature Gasket Material,High Temperature Insulation Materials Changchun City Taiyuan FluorphlogopiteCo. Ltd. , https://www.micaslice.com
First, preparation before maintenance