Fire pump in the building and spray pump (hereinafter referred to as fire pump equipment) is an important fire-fighting facilities in the equipment, fire pump fire pipe network to undertake the task of water supply, just as important as the human heart. The purpose of setting fire pump equipment in buildings is to reduce the life and property damage caused by the fire. If the building fire pump equipment in a link failure, resulting in fire in the building fire pump equipment does not work. This will cause unnecessary losses to the life and property of the country and people. Therefore, the fire pump equipment in the overhaul process, the diagnosis of fire pump equipment failure is a key link, the following Asian Fluid Network Xiaobian give several common failures and elimination measures for everyone to target the fire pump equipment fault diagnosis . Fire pump equipment safety should not be overlooked Fault diagnosis and elimination measures First, the fire pump equipment No liquid supply, inadequate supply of liquid or lack of pressure Fire pump equipment is not water or no proper exhaust Elimination measures: Check the pump housing and inlet pipe are all Filled with liquid. 2. Fire pump equipment speed is too low Elimination measures: Check the motor wiring is correct, the voltage is normal or the turbine steam pressure is normal. 3. Fire pump equipment system head too high Elimination measures: Check the system head (especially the friction loss). 4. Fire pump equipment suction too high Elimination measures: Check the existing net head (inlet pipe is too small or too long will cause a great friction loss). 5. Impeller or pipeline plugging Elimination measures: Check for obstructions. 6 fire pump equipment rotation direction is not correct measures: Check the direction of rotation. 7. Fire pump equipment to produce air or inlet pipeline leakage mitigation measures: Check the inlet pipeline for air cavitation and / or leakage. 8. Fire pump equipment packing box stuffing or seal wear, the air leaked into the pump casing Elimination measures: Check the packing or seal and replace as needed, check the lubrication is normal. 9. Fire pump equipment pumping hot or volatile liquid suction head inadequate Elimination measures: Increase suction head, consult the manufacturer. 10. Fire pump equipment at the end of the valve is too small Elimination measures: the correct size of the valve installed at the end. 11. Fire pump equipment at the end of the valve or inlet pipe immersion depth is not enough measures to eliminate: Fire pump equipment manufacturers consult the correct depth of immersion. Eliminate eddies with baffles. 12. Fire pump equipment impeller clearance is too large Elimination measures: Check the gap is correct. 13. Fire Pump Equipment Impeller Damage Elimination Measures: Check the impeller, as required replacement. 14. Fire pump equipment impeller diameter is too small Elimination measures: Ask the manufacturer for the correct impeller diameter. 15. Fire pump equipment pressure gauge position is not correct Elimination measures: check the location is correct, check the outlet nozzle or pipe. Second, the fire pump equipment will stop running for a while 1. Fire pump suction device too high Elimination measures: Check the existing net head (inlet pipe is too small or too long will cause great friction loss). 2. Fire pump equipment impeller or pipeline removed by blocking measures: Check for obstructions. 3. Fire pump equipment to produce air or inlet pipeline leakage mitigation measures: check whether there is air inlet and outlet cavitation and / or air leakage. 4. Fill the packing or seal in the stuffing box of the fire pump equipment and allow air to leak into the pump housing. Removal Action: Inspect the packing or seal and replace as required. Check the lubrication is normal. 5. Fire pump equipment pumping hot or volatile liquid inhalation head shortage Elimination measures: Increase the suction head, consult the manufacturers. 6. Fire pump equipment at the end of the valve or inlet pipe immersion depth is not enough to eliminate measures: Fire pump equipment manufacturers consult the correct depth of immersion, with the baffle to eliminate eddy currents. 7. Fire pump equipment pump housing gasket damage to eliminate measures: Check the gasket and the situation required to be replaced. Third, fire pump equipment power consumption is too large 1. Fire pump equipment is not the direction of rotation to eliminate measures: Check the direction of rotation. 2. Fire Pump Equipment Impeller Damage Elimination Measures: Check the impeller, as required to be replaced. 3. Fire pump equipment rotating parts bite elimination measures: Check the internal wear parts of the gap is normal. 4. Fire pump equipment shaft bending elimination measures: straightening shaft or according to the requirements of the replacement. 5. Fire pump equipment is too high Remedy: Check motor winding voltage or steam pressure delivered to the turbine. 6. Fire pump equipment head below the rated value. Pump too much liquid Elimination measures: Fire pump equipment manufacturers consulting. Install throttle valve, cut impeller. 7. Fire pump equipment liquid heavier than the expected value Elimination measures: Check the proportion and viscosity. 8. Fire pump equipment packing box is not properly filled (insufficient packing, not properly inserted or run together, the packing is too tight) Elimination measures: Check the packing, packing stuffing. 9. Fire pump equipment bearing lubrication is not correct or bearing wear and tear to eliminate Measures: Check and replace as required. 10. Fire pump equipment wear ring between the running gap is not correct Elimination measures: Check the gap is correct. Replace pump housing and / or impeller wear rings as required. 11. Fire pump equipment Pump casing stress is too large Elimination measures: eliminate stress and fire pump equipment manufacturers consult the representative. After eliminating the stress, check the alignment. (Editor: Ye Qianwen) An expanded reading: 2016 China World Expo 2016 Beijing Oil Show pump valve pipe fittings exhibition information 2016 exhibition information
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