The fire fighting jockey pump is a kind of fire-fighting pump. It is used to stabilize the pressure of the automatic sprinkler system and the fire hydrant water supply system, so that the system water pressure is always in the required pressure state. Once the nozzle or fire hydrant is out of water, it can flow out to meet the requirements of fire-fighting water. The amount of water and water pressure.
The long-term use of the fire fighting jockey pump can not always fail, or because of improper operation, and does not rank the quality of the equipment. In short, it is the last word to analyze and solve. Today, the manufacturer will bring everyone to understand one of the faults: the fire-stabilized pump has frequent start and stop:
In an on-board voltage regulator system with a regulated pump, the general regulator pump is controlled by a pressure detecting device set up on the system piping and automatically starts and stops. The working process of the steady-state pump in the system is when the pressure in the system pipeline is lower than the lower limit of the steady-state pressure of the steady-state pump, the steady-state pump starts to replenish the system pipeline; when the pressure in the system pipeline is higher than the voltage regulation When the pump regulates the upper limit of the pressure, the steady-state pump stops running. The steady-state pump circulates between the upper and lower pressure values ??of the regulated voltage. In many projects, the stabilizing pump often occurs after the system piping pressure is lower than the lower pressure limit value, stops every few seconds, and then restarts until the pressure in the system piping reaches the regulated pressure. Limits, only * stop this workflow. There will also be frequent start and stop of the steady pressure pump.
Analysis of the causes of frequent start and stop of fire fighting jockey pump
After investigation and analysis in some typical projects, the reasons for the frequent start and stop of the constant pressure pump are obtained:
The main reason for the frequent start and stop of the fire-fighting pump is that after the start-up of the constant-pressure pump, the system is only a slight leakage and pressure relief. The system pipeline is still a closed pipeline with pressure water and a restrained boundary. The measurement of the pressure detection device The pressure energy at the point can not be transmitted immediately, causing the local pressure to rise rapidly, reaching the upper limit pressure of the constant pressure pump, and the pressure detecting device controls the water pump to stop running. When the steady-state pump stops running, the local pressure energy at the measurement point has been transmitted. The pressure of the entire system is slightly increased, but the pressure of the pipe network is still lower than the lower limit of the steady-state pressure of the steady-state pump.
The fire fighting jockey pump is immediately started up under the control of the pressure detecting device. Then, due to the rapid increase of partial pressure, the pressure energy can not be transmitted immediately and stop running. This repeatedly causes the constant pressure pump to start and stop frequently.