Today Tianjin Tianjin Ott Pump Co., Ltd. Guangdong submersible pump sales center technical director to introduce how to determine the regulator pump flow, I hope we can be helpful!
Abstract: Regulator pump is a fire pump for automatic sprinkler system and fire hydrant water supply system pressure stability, the system pressure is always in the required pressure state, once the nozzle or fire hydrant water, that can flow out to meet the fire water Need water and water pressure. Booster pump and booster pump, although both are a booster facilities, booster pump operation in the nozzle and hydrant never outflow, the booster pump work in the nozzle and the hydrant has been out of water, and fire water pressure is not enough, need When increasing water pressure.
Key words: Regulating pump, flow rate
Regulator pump is a kind of fire pump for automatic sprinkler system and fire hydrant water supply system pressure stability, the system pressure is always in the required pressure state, once the nozzle or fire hydrant water, that can flow out to meet the fire water required Water and water pressure. Booster pump and booster pump, although both are a booster facilities, booster pump operation in the nozzle and hydrant never outflow, the booster pump work in the nozzle and the hydrant has been out of water, and fire water pressure is not enough, need When increasing water pressure.
The current norms of our country, "Fire Code for Design of High-rise Civil Building" (GBJ50045-95) (hereinafter referred to as "high regulation") on the pressurized facilities (including the regulator pump) has the following provisions: "7.4.8.1 booster pump water, The fire hydrant water supply system should not exceed 5L / s, automatic sprinkler system should not exceed 1L / s. "This provision is a precondition, one of the conditions is no fire water supply system water tank; the second condition is the indoor fire A small amount of water supply system leaks mainly in the pump seal. The provisions of the provisions do not mean that in any case, any condition, at any time regulator pumps are determined by this flow.
"High regulation" refers to the booster pump, booster pump refers to the booster, but also refers to the regulator with a constant pressure pump, the standard provisions are not distinguished, and in fact booster pump and pump in action and Functionally different, the flow rate is not the same.
Booster pump for the nozzle and fire hydrant has been out of the flow of fire water pressure is not enough, need to increase the pressure to meet the fire water pressure requirements. At that time, the booster pump flow should ensure that a nozzle or a fire hydrant outflow, that is not less than 1L / s or 5L / s. However, once the booster pump is started, the fire main pump is also followed by the start, the role of booster pump does not seem very urgent and necessary.
Regulators pumps, unlike booster pumps, are used to keep sprinkler and hydrant systems under the required pressure conditions and to meet the water and pressure requirements of fire fighting water once it is discharged. Its role is very obvious, so the standard refers to booster pump, essentially refers to the regulator pump, especially the automatic sprinkler system, pump regulator pump flow rate depends on many factors, the more important Factors are:
(1) Category of system Consider the water quantity of a sprinkler when the turbo pump is used in a sprinkler system; and for a fire hydrant system, consider the amount of water in a fire hydrant.
(2) Whether there is no air pressure water tank supporting the setting of non-pressure water tank, the pressure regulator pump flow is not more than a nozzle or a fire hydrant water quantity calculation. A gas tank equipped with water, the system of water supplement and pressure assurance is carried out by the pressure tank, the pump flow only to meet the pressure on the flow of water tank requirements, that is, the pressure pump flow should consider the pressure of water Adjustable volume of the tank factors. At this point, the regulator pump flow should be calculated according to the total volume of air and water tank and the volume of water inside the tank. Pump water should be when the tank is the average pressure, not less than the maximum hourly pipe network traffic 1.2 times.
"High regulation" provisions do not have the provisions of the pressure tank must be configured, but no pressure tank, pump start frequently, easy to damage; pressure tank, pump start frequently can be alleviated, the system regulator Situation guarantees can be better reflected. However, the need to increase the cost of pressure tank, the general situation supporting the setting of pressure tank volume is not too large, the volume is less than 50L is appropriate. Shanghai has prepared a standard set of pressure pumps supporting atmospheric pressure water tank set by the Shanghai Haiying Machinery Factory.
(3) System-wide quasi-high-pressure water supply system with constant pressure pump (or stable high-pressure water supply system), the scope of indoors, but also indoor and outdoor. Indoor quasi high pressure water supply system, the pipe is made of steel pipe, the connection is made of thread, flange or welded connection. The leakage of the pipe network system mainly occurs in the sealed part of the water pump, and its quantity is relatively limited. The indoor and outdoor quasi-high-pressure water supply system, as the outdoor pipe using cast iron pipe, the socket socket connection, the interface seal with rubber ring, pipe network larger, interface leakage in the entire amount of leakage accounted for a considerable proportion. Immediately after the construction of the pipeline, the soil will be replied, and sometimes the interface part will be reinforced by the suspected soil. Even if there is leakage, it is very difficult to take remedial measures. All these indicate that indoor and outdoor use of quasi-high-pressure water supply system, the pump flow should leave enough room.
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