fire fighting jockey pump is used in the fire-fighting water supply system to stabilize the water pressure at the most unfavorable point. It is connected to the pressure relay through three pressure control points (P2, P3, P4) to control its work. It is an electrical control product used in fire protection. The electrical appliances used in fire control are different from the ones we usually use in power distribution. In the process of using these products, they will be subject to different regulations and different national standards.
The flow rate and design pressure of fire fighting jockey pumps are very important technologies. Generally speaking, the determination of flow rates and design pressures can be comprehensively judged by the following items:
Determining the flow rate of fire stabilization pump
Technical specifications of fire water supply and fire hydrant system, Article 5.3.2 of GB50974-2014, the design flow of the pressure-stabilizing pump should meet the following requirements: The design flow of the pressure-stabilizing pump should not be less than the normal leakage of the fire-fighting water supply system pipe network and the automatic start-up flow of the system . (Mandatory provision)
The normal leakage of the pipe network should be determined based on the material of the pipeline, the type of interface, etc. When there is no data on the leakage of the pipe network, the design flow of the pressure-stabilizing pump should be based on 1% ~ 3% of the design flow of fire water supply, and it should not be less than 1L / S.
The minimum opening flow rate of the standard alarm valve of the product is 1L / S. The design flow rate of the pressure regulator pump of the self-injection system should not be less than 1L / S, and the design flow rate of the pressure regulator pump of the hydrant system should not be less than 1L / S. The design flow of the pressure-stabilizing pump is 1L / S, and the effective volume of the pressure tank is 150L, ??which meets the specifications.
Determining the design pressure of fire stabilization pump
1. The design pressure of the pressure-stabilizing pump should meet the requirements of automatic startup of the system and the filling of the pipe network;
2. The design pressure of the pressure-stabilizing pump should keep the pressure at the system automatic pump starting pressure setting point higher than the system setting automatic pump starting pressure in the quasi-working state, and the added value should be 0.07-0.1Mpa;
3. The design pressure of the pressure-stabilizing pump should keep the hydrostatic pressure of the water fire extinguishing facility at the most disadvantageous point of the system at quasi-working state greater than 0.15 MPa.