I. Construction preparation work
1. Prepare special measures for non-explosion-proof electrical equipment before construction. Non-explosion-proof electrical equipment can be used after approval, and its performance must be checked before use.
2. Prepare the tools used in the construction process in advance: the mechanic prepares the wrench, the dental forceps, the saw blade, the sandpaper, the raw material belt, etc. The electrician prepares the screwdriver, the wrench, the test pencil, the electric inspection rod, the insulating boots, the insulating gloves. Gas portable instrument, cordon 10 meters, etc.
3. Arrange personnel to go down the well to clean up the construction site in advance, and clean all flammable debris to ensure that there are no safety hazards.
4. The central pump room electrical maintenance engineer will advance the main drainage pump, motor, high voltage switch cabinet, line, operation console, distribution box, pipeline, gate valve, hydraulic station, hydraulic oil pipe, pressure gauge and vacuum gauge in the central pump room. Check all the time to make sure the main drainage is intact.
5. The main drain pump driver on the day before and on the day of the test is reasonably drained according to the water volume of the water tank. It is necessary to ensure that the water storage capacity of the inner and outer water tanks meets the drainage requirements during the performance test of the main drain pump and the joint test run.
6. Arrange the full-time mechanics Changhong and Gaoxin mines to go down the well in advance, and use the saw blade and sandpaper to polish the test points of the ultrasonic flowmeter at the corresponding position specified by the main drain pipe of the head of the mountain head of the Matoumen, and cooperate with the testing center staff. The DCT7088 ultrasonic flowmeter is installed on the polished test position of the main drain pipe of the middle, and is adjusted on-site by the test center staff to ensure accurate and effective measurement results.
7. Before the construction, the gas concentration of the construction site shall be checked by the gas detector in the ventilation area, and the construction may be less than 0.5%.
Second, the construction steps
Main drainage pump performance testing and joint commissioning work is mainly done by the Anhui coal deposits in the safety product testing center personnel, to be with the team arrange four pieces. The specific construction steps are as follows:
(1) Construction test procedures for each pump performance (taking 1# main drain pump as an example)
1. The person in charge of construction observes the current status of the central substation 1#, 11# high-voltage switch (control 1# main substation pump high-voltage switch at the central substation I section main switch), and the central substation The electrician on duty can confirm that the 1# main drain pump can be turned on.
2. The four major team electrical and mechanical maintenance workers cooperate with the testing center staff to remove the M20 bolts installed on the test holes welded on the 1# main drain pump check valve, and insert the BCY-2 pump efficiency tester probe into the test hole. And tighten with a wrench.
3. The four major team mechanical and electrical maintenance workers cooperate with the testing center staff to dismantle the pressure gauge and vacuum gauge installed on the inlet and outlet pipes of the 1# main drainage pump, and use the raw material belt to bring the special pressure gauge and vacuum gauge brought by the testing center. After the bottom thread is wrapped, reinstall it in the appropriate position.
4. The test center staff will firmly measure the speed of the main drain pump to the main drain pump spindle with the speed measuring tape.
5. While doing the above work, the four-team central pump room full-time electrician strictly turns on the power transmission operation step to open the 4# high-voltage switchgear (No. 16489#) of the 1# main drain pump controlled by the central substation, and open the cabinet. The door, the test center staff will clamp the HSDZC motor economic operation tester test clip to the three-phase voltage and current wiring of the 1# pump high-voltage switchgear protector, ensuring that the clamp is firmly and reliably, and then the HSDZC motor economic operation tester is exhausted. It may be placed far away from the high-voltage switchgear. After confirmation, the 4# high-voltage switchgear (No. 16489#) will be turned to the closing position by the central pump room full-time electrician, and around the 4# high-voltage switchgear (length 5 meters, away The horizontal distance of the high-voltage switchgear is not less than 1m.) The warning line is set up, and the security personnel will guard against it. It is strictly forbidden for other personnel to enter the warning line during the test.
6. After all the work is properly deployed, there are no hidden dangers. The four major full-time main drain pump drivers open the 1# main drain pump according to the main drain pump operating procedure (push the 1# hydraulic gate valve to the fully open position and ensure the 2# hydraulic gate valve) In the fully closed state), drain from the main drain of the South Road.
7. After the 1# main drain pump is running normally, the pump performance test is officially carried out. The four major team members cooperate with the test center staff to do the pump vibration (AR63a type vibration meter) and the speed (UT372 type tachometer). Measurement of spindle temperature (UT302C infrared thermometer) and workshop noise measurement, recording vacuum gauge, pressure gauge reading, current, voltage, pump shaft power, motor input and output power, and pump efficiency tester on motor economic operation tester Data such as flow rate and pressure, and various types of data records are not less than 4 times.
8. At the end of the test, the main drain pump stops the operation of the main drain pump in strict accordance with the operation rules of the main drain pump. The four major teams of electrical and mechanical maintenance workers cooperate with the test center staff to use the 1# main drain pump and the control 1# main drain pump. The high-voltage switch is restored to its original state (including the vacuum gauge, pressure gauge, pump efficiency tester, motor economic operation tester, warning line, re-installation vacuum gauge, pressure gauge, etc.) brought by the inspection center.
9. Test the 2#---5# main drain pump in the same way and method. The gate valves are opened 3#, 5#, 7#, 9# respectively until the end of the test.
(2) Construction steps of pump joint commissioning operation
The joint test run of the pump will simultaneously open the 1#-4# pump operation method to carry out the joint test run of the main drain pump. At that time, the 1# pump opens the 1# hydraulic gate valve to drain from the main drain of the south road, and the 2# pump opens the 4# hydraulic gate valve. 3# pump open 6# hydraulic gate valve drains from the main drain of the middle road, 4# pump opens 7# hydraulic gate valve to drain from the main drain of the north road. The specific construction steps are as follows:
1. The power supply team and the team level management personnel adjust the power supply of the 2# and 4# main drain pumps according to the load status of the central first substation and the central second substation, and then realize the 1# main drain pump power supply from the central The first substation I section, 3# main drain pump power supply from the central first substation II, 2#, 4# main drain pump power supply from the central second substation III or IV, to be strict Perform the power-off operation according to the power-off operation steps and requirements. The specific power-off steps are as follows:
1. In turn, the central first substation 23#---26# high voltage switch and 27# communication switch are hit to the opening position;
2, check and confirm the central first substation 10 #, 21 # two sets of switches (now 10 # is in the open, 21 # is in the closing position), if necessary, the opening operation to make the two switches open status;
3. According to the load condition of the two sections of the central second substation, 38# (III section) or 42# (section IV), the tie switch of the section with a small load is hit to the closing position.
4. Hit the central second substation 40# contact switch to the closing position;
5. Hit the 27# contact switch of the central first substation to the closing position;
6. Turn the high voltage switch of the central first substation 26#---23# to the closing position.
2. The four major team mechanical and electrical maintenance workers cooperate with the testing center staff to dismantle the pressure gauges and vacuum gauges installed on the inlet and outlet pipes of the 1#---4# main drainage pump, and use the raw material belt to bring the special purpose brought by the testing center. After the pressure gauge and the bottom of the vacuum gauge are wrapped, reinstall them in the corresponding positions.
3. The main drain pump driver turns on the 1#--4# main drain pump in accordance with the requirements of the main drain pump operation procedure. The four major team electromechanical repair workers cooperate with the test center staff to record the vacuum table when the four main drain pumps are running. Pressure gauge readings and data on the ultrasonic flowmeter installed on the main drain of the middle.
4. Install the ultrasonic flowmeter to the polished installation position on the main road of the South Road and North Road of Ma Taumen, and record the relevant data of the main drain pump again to ensure that the recorded data is not less than 4 times.
5. After the test data collection is complete, the main drain pump driver stops the operation of the four main drain pumps in strict accordance with the main drain pump operation rules. The four major team electromechanical repair workers cooperate with the test center staff to restore the four main drain pumps to their original state. The testing instruments and instruments carried by the testing center are all stored in the corresponding toolbox.
6. The power supply team and the team level management personnel are responsible for restoring the power supply of the 2# and 4# main drain pumps to their original state. Restoring the original power supply is strictly carried out according to the power-off operation steps and requirements. The specific steps are as follows:
1. In turn, the central first substation 23#---26# high voltage switch and 27# communication switch are hit to the opening position;
2. Move the central second substation 40# contact switch to the opening position;
3. The 38# or 42# communication switch that was originally in the closed state of the central second substation is hit to the opening position;
4. Check in advance to confirm that the central first substation 10# contact switch is in the opening position and then the central first substation 21# contact switch is hit to the closing position;
5. Hit the 27# contact switch of the central first substation to the closing position;
6. Turn the high voltage switch of the central first substation 26#---23# to the closing position.
7. The four major team of electrical and mechanical maintenance workers and on-site construction responsible person is responsible for cleaning up the site to ensure that the residual drainage and safety hazards can be completed before the main drainage pump performance test and joint commissioning work can be completed.
Third, construction considerations
1. Arrange the deputy head of the district and the four major team level on-site during the construction period.
2. The power supply team arranged for a team-level manager to coordinate the work on the spot.
3. The central pump room electrical maintenance engineer inspects the main drainage facilities in advance to ensure that the main drainage pump driver controls the water volume inside and outside the water tank as required to meet the main drainage pump performance test and the drainage demand during the joint test operation.
4. Before the construction, implement this measure to each participating construction personnel, and clarify the construction tasks and safety precautions of each construction personnel.
5. Report to the dispatching station before and after construction, and agree to open the pump.
6. The mechanical and electrical maintenance workers and the main drainage pump drivers must be certified to work, operate high-voltage electrical equipment, and must wear appropriate insulating equipment during operation. One-person operation and one-person monitoring should strictly follow the corresponding power-off operation steps. Provisions.
7. After opening the high-voltage switch cabinet door, you must set an alert around it and arrange a special person to guard it.
8. All construction steps must be confirmed by “finger dictation” and the next step can be performed after confirmation.
9. All non-explosion-proof electrical equipment must be transported to the well immediately after use and must not be left in the well.
10. Others that are not in place are strictly in accordance with the “Safety Regulations for Coal Mines” and relevant regulations.
