What Is a Fire Pump?
Fire pumps, as the name suggests, are used in firefighting. Fire pumps are imported from foreign countries. They are classified into different types according to different classification methods. They are fully sealed, leak-free and corrosion-resistant. They are widely used in environmental protection, water treatment, fire protection, etc. The department is used to pump all kinds of liquids, and is the ideal pump and fire protection system for creating non-leakage and pollution-free civilization workshops and civilization factories. The pump types are all similar, but the head and flow are different. The selection basis of fire pumps should be considered in accordance with five aspects, such as process flow, water supply and drainage requirements. The performance and technical conditions of the fire pump meet the requirements of the "Fire Pump Performance and Test Methods" standard.
Fire Pump
- Chinese name
- Fire Pump
- Foreign name
- fire pump
- Features
- Fully sealed, no leakage, corrosion resistance
- Application department
- Environmental protection, water treatment, fire fighting, fire truck
- Fire pumps, as the name suggests, are used in firefighting. Fire pumps are imported from foreign countries. They are classified into different types according to different classification methods. They are fully sealed, leak-free and corrosion-resistant. They are widely used in environmental protection, water treatment, fire protection, etc. The department is used to pump all kinds of liquids, and is the ideal pump and fire protection system for creating non-leakage and pollution-free civilization workshops and civilization factories. The pump types are all similar, but the head and flow are different. The selection basis of fire pumps should be considered in accordance with five aspects, such as process flow, water supply and drainage requirements. The performance and technical conditions of the fire pump meet the requirements of the "Fire Pump Performance and Test Methods" standard.
- The following terms and definitions apply to this standard.
- Fire Pump
- installed at
- 1 time of drawing water
- The time from the start of the water diversion device to the start of the pressure gauge of the fire pump.
- 2 suction height
- The height difference between the pump reference level and the suction level.
- 3 high and normal pressure combinable status
- The pump can provide both high and low pressure operating conditions.
- 4 Middle and normal pressure combinable status
- 1.1 Can be divided according to whether there is a power source
- a Unpowered fire pump (referred to as pump);
- b
- The model of unpowered fire pump consists of the pump feature code, main parameters, use feature code, and auxiliary feature code.
- Generally, during the firefighting pump maintenance, the diagnosis of the firefighting pump's failure is a key link. Several common faults and elimination measures are given below for targeted diagnosis of the firefighting pump's failure.
- 1. No liquid supply, insufficient liquid supply or insufficient pressure
- 1) The pump is not filled with water or not properly vented
- Remedy: Check that the pump casing and inlet lines are completely filled with liquid.
- 2) Speed is too low
- Remedy: Check whether the motor wiring is correct, the voltage is normal, or the steam pressure of the turbine is normal.
- 3) System head is too high
- Remedy: Check the system's water head (especially friction loss).
- 4) Suction is too high
- Remedy: Check existing net head
- 5) The impeller or pipeline is blocked
- Remedy: Check for obstructions.
- 6) The direction of rotation is incorrect
- Remedy: Check the direction of rotation.
- 7) Leakage of air or inlet pipeline
- Remedy: Inspect the inlet lines for air pockets and / or air leaks.
- 8) The packing or seal in the stuffing box is worn, causing air to leak into the pump casing
- Remedy: Check the packing or seal and replace as necessary, and check whether the lubrication is normal.
- 9) Pumping hot or
- The selection of the fire pump should be based on the process of fire pump application engineering, water supply and drainage requirements,
- The fire pump room provides water for fire fighting
- Self-test method for fire protection
- The start-up relationship between the fire control room and the hydrant action button is related to the starting form of the hydrant pump. There are two ways to start the fire hydrant pump. The first way is to start the fire hydrant action button under the bus control mode. The required start signal can be sent to the fire control through the linkage interface module located next to the hydrant Room console, and then output the digital contacts that enable the hydrant. The second starting method is to directly output the switching contact of the fire hydrant action button to the fire hydrant pump starting box. Both of these starting methods can be used in actual design. The former method saves wiring, but needs to perform address coding programming on the hydrant linkage module under the bus system to achieve the purpose of monitoring a large number of hydrants. The latter method is simple and reliable, but the fire hydrant action signal needs to be returned to the fire control room. Designers can choose according to the actual project size in specific designs. For large-scale projects and complex building forms, the former startup method can be adopted, and for the small scale, the latter startup method can be adopted.
- The self-starting of the spray pump is through the pipe network of each protection area
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||||
|
| ||||
|
|
|
|
|
|
|
| ||||
|
| ||||
|
|
|
|
|
|
|
| ||||
|
| ||||
|
|
|
|
|
|
|
| ||||
|
| ||||
|
|
|
|
|
|
|
| ||||
|
| ||||
|
|
|
|
|
|
|
| ||||
|
| ||||
|
|
|
|
|
|
|
| ||||
|
| ||||
|
|
|
|
|
|
|
| ||||
|
| ||||
|
|
|
|
|
|
|
| ||||
|
| ||||
|
|
|
|
|
|
|
| ||||
|
| ||||
|
|
|
|
|
|
|
| ||||
|
| ||||
|
|
|
|
|
|
|
| ||||
|
| ||||
|
|
|
|
|
|
|
| ||||
|
| ||||
|
|
|
|
|
|
|
| ||||
|
| ||||
|
|
|
|
|
|
|
| ||||
|
| ||||
|
|
|
|
|
|
|
| ||||
|
| ||||
|
|
|
|
|
|
|
| ||||
|
| ||||
|
|
|
|
|
|
|
| ||||
|
| ||||
|
|
|
|
|
|
|
| ||||
|
| ||||
|
|
|
|
|
|
|
| ||||
|
| ||||
|
|
|
|
|
|
|
| ||||
|
| ||||
|
|
|
|
|
|
|
| ||||
|
|
- Inspection before starting fire pump
- 1. Check the process valve switching status, and whether the corresponding return valve switching status can meet the request.
- (1) During the daily test of the pump, the return valve should be fully open and the valve of the valve group should be in the closed position. Trial 1 # foam pump, 2 # pump foam outlet need to close the Vp111, Vp112, Vp212 three foam tank inlet valves, open the Px021 return valve to start the pump; try 2 # pump water outlet, 3 #, 4 # The fire pump of the fire truck needs to open the Px011 return valve to start the pump. After the test pump is finished, all valves will be restored to the regular state.
- (2) When an emergency occurs or water is required for a fire drill, open the valve at the position where the fire water (foam) is required, and the return valve is closed.
- (3) The pump inlet valve must have a normally open and the outlet valve in the closed position.
- 2. Check that the clutch handle of the vacuum suction installation is in the "closed" position.
- 3. Open the air valve and close the air release valve after resetting the float assembly.
- Fire pump start and stop operation steps
- 1. After starting the pump, check the running current of the motor and the normal operation of the pump. If there is any abnormality, stop the pump immediately.
- 2. Check the pressure gauge at the outlet of the pump. When the pointer of the pressure gauge reaches the rated working pressure and stabilizes, gradually open the outlet valve to try to make the pump work at the rated state.
- 3. After the pump is normally filled with water, move the clutch handle for vacuum installation to the "minute" position.
- 4. Check the pressure of the valve group. The pressure of the fresh water valve group is about 0.8Mpa, and the foam valve group is about 1.0Mpa. If the pressure cannot be maintained, the pump outlet and return valve can be properly adjusted to control the pressure.
- 5. The temperature of the pump and motor bearings should be checked frequently. The maximum temperature cannot exceed 75 degrees. Check that the working current of the motor is within the normal range.
- 6. After stopping the pump, return all the valves to the normal state as requested by the valve opening and closing status indicator.
- 7. Move the vacuum-inserted clutch handle to the "closed" position, open the air valve, and reset the floating ball assembly to be ready for use.
- 8. If the pressure reaches 0.8Mpa and then returns to about 0.4Mpa immediately after the pump is started, water cannot be discharged normally. At this time, the pump should be stopped immediately, and the air valve should be opened to reset the float assembly and restart.
- 9. Under normal conditions, 1 # and 2 # voltage-stabilizing pumps ensure that one is in working state and one is in standby state.
- Fire Pump Maintenance and Care
- 1. Check and ensure that the power supply and circuits of the fire protection system are unobstructed and the electrical equipment is intact.
- 2. The pump is pumped once per shift, and the coupling should be evenly weighted, without abnormal sounds and well documented.
- 3. On the 5th, 10th, 15th, 20th, 25th, and 30th of each month, check the smooth oil level in the vacuum suction installation. The refueling position is at or slightly below the centerline of the oil window; Check the water feeding time of the pump and make a record. The 1 # and 2 # pumps run for 15 minutes, and the 3 # and 4 # pumps run for 5 minutes.
- 4. After the pump is started, check the operation of the float assembly. There should be no water in the exhaust hose. If there is water, the float seal must be changed.
- 5. After the pump is started, check if the vacuum-sealed installation size is tight and the exhaust is normal.
- 6. Check the packing seal level after the pump is started. The leakage should not exceed 10-30 drops / min.
- 7. Regularly check the smooth oil in all parts of the pump to ensure that the smooth system works normally.
- 8. Regularly check whether the joints are fastened and loose.
- A. Inspection and maintenance of fire alarm system Daily self-check function check of fire alarm controller:
- a) Press the self-test key to let the alarm controller perform a self-test.
- b) Then press the mute button to cancel the sound of the controller.
- B. Monthly inspection and maintenance of hydrant pump
- a) Complete the daily inspection and maintenance;
- b) Controller main working voltage test;
- c) The inclination of smoke detectors and temperature detectors in public places is not more than 45 °, whether the contact with the base is good, and the appearance is clean and intact;
- d) Randomly select no less than 5% of the smoke detectors and check whether the alarm is correct after spraying;
- e) Manual alarm button, check whether the installation is firm, whether it is damaged or lost;
- f) Select two manual alarm buttons to simulate alarm and test whether the alarm function is normal;
- g) Check the appearance of each branch box in the internal road on the floor, and check whether the external wiring is well fixed;
- h) Cleaning and dust removal of fire alarm control cabinet and linkage control cabinet. The line is loose and should be tightened. Check the self-test, silencer, reset function, switch between main power supply and backup power supply, alarm check.
- C. Annual inspection and maintenance
- According to the "fire equipment annual maintenance record form".
- D. Maintenance of hydrant pump
- Pump body:
- a) Check, replenish, and replace the lubricating oil. If the oil discolors, all iron filings should be replaced;
- b) Leak check: the packing is good, there is no seepage, overflow, trachoma in the pump body, and there is no overflow from the pump shaft to the ground;
- c) Flexible rotation, no jamming, pump shaft and motor shaft are on the same centerline, machine base is fastened, screws are rust-free (with anti-rust measures), and gaskets are provided.
- d) The appearance is neat, the paint is intact, the sign is clear, and the nameplate is clear.
- E. Valves, pipes and accessories:
- a) The valve can be opened and closed flexibly, without jamming, closed tightly, and there is no leakage inside and outside;
- b) The valve body and handle are intact, the valve stem is well lubricated, and the appearance is neat;
- c) One-way valve has flexible action and no water leakage;
- d) The pointer of the pressure gauge is flexible, the indication is accurate, the dial is clear, the position is easy to observe, and it is sturdy and good.
- F. Fire Hydrant Pump Motor:
- a) The appearance is neat, the nameplate is clear, all parts are fastened firmly, and the coupling has a protective cover;
- b) The connection ends of the wire lugs are tight and firm, no signs of discoloration, no exposed parts, and good grounding.
- During the maintenance of marine fire pumps, fault diagnosis of fire pumps is a key link. Here are some common faults and their elimination measures:
- Stop after a while
- 1) The suction stroke is too high. Elimination measures: Check the existing net pressure head (the inlet pipeline is too small or too long to cause great friction loss). 2) Impeller or pipeline blockage elimination measures: check for obstacles. 3) Measures to eliminate air leakage or inlet pipeline: Check the inlet pipeline for air pockets and / or air leakage. 4) The packing or seal in the stuffing box is worn, so that air leaks into the pump casing. Elimination measures: check the packing or seal and replace as necessary. Check if the lubrication is normal. 5) Insufficient suction head when pumping hot or volatile liquids: Increase the suction head and consult the manufacturer. 6) Insufficient immersion depth of the bottom valve or inlet pipe: Consult the manufacturer for the correct immersion depth, and use a baffle to eliminate eddy currents. 7) Water pump casing seal gasket damage elimination measures: check the condition of the gasket and replace it as required.
- Marine pump power consumption is too large
- 1) The direction of rotation is not corrective Action: Check the direction of rotation. 2) Impeller damage elimination measures: Check the impeller and replace it as required. 3) Elimination measures for biting of rotating parts: Check whether the internal clearance of worn parts is normal. 4) Shaft bending elimination measures: Straighten the shaft or replace it as required. 5) Too high speed Elimination measures: Check the winding voltage of the motor or the steam pressure delivered to the turbine. 6) The head is below the rated value. Pumping too much liquid Elimination measures: Consult the manufacturer. Install a throttle valve and cut the impeller. 7) Liquid heavier than expected. Elimination measures: check specific gravity and viscosity. 8) Stuffing box is not properly packed (insufficient packing, not plugged in or running-in properly, packing is too tight) Elimination measures: check the packing and refill the stuffing box. 9) Improper bearing lubrication or bearing wear elimination measures: Check and replace as required. 10) Improper running clearance between wear rings Elimination measures: Check whether the clearance is correct. Replace the wear ring of the pump casing and / or impeller as required. 11) The stress of the pipeline on the pump casing is too great.
- Insufficient fluid or pressure
- 1) The pump is not filled with water or there is no proper exhaust elimination measures: Check whether the pump casing and the inlet pipeline are completely filled with liquid. 2) Too low speed Elimination measures: check whether the motor wiring is correct, the voltage is normal or the steam pressure of the turbine is normal. 3) System water head is too high Elimination measures: Check the system water head (especially friction loss). 4) The suction stroke is too high. Elimination measures: Check the existing net head (the inlet pipeline is too small or too long, which will cause great friction loss). 5) Impeller or pipeline blockage elimination measures: check for obstacles. 6) The rotation direction is not corrective measures: Check the rotation direction. 7) Measures to eliminate air leakage or inlet pipeline: Check the inlet pipeline for air pockets and / or air leakage.