Small and medium-sized water supply pump station and using method of pump station

Abstract

The invention discloses a small and medium-sized water supply pump station. The pump station is characterized in that the small and medium-sized water supply pump station comprises at least one or three main pumps, a first flow regulating pump, a second flow regulating pump, a third flow pump and one or two standby pumps, wherein the water pumps are connected in a parallel manner, water outlets ofwater pumps communicate with a water supply pillow pipe through a pipeline, a pressure sensor and a flowmeter are arranged on a water outlet pipe of the water supply pump station, and each water pumpparameter configuration of the water supply pump station is disclosed. The invention further discloses a use method of the small and medium-sized water supply pump station. The use method comprises ause method of the water supply pump station in a stand-machine operation mode, a use method of the water supply pump station in a double-machine parallel operation mode, and a use method of the watersupply pump station in a three-machine parallel operation mode. According to the small and medium-sized water supply pump station and the use method of the pump station, the water pumps can be ensured to operate in an efficient area, so that the efficiency of the pump station is greatly improved, and the electric energy is saved.

Description

technical field [0001] The invention relates to a water supply control system, in particular to a flow zone intelligent water supply system and a method for using the system. Background technique [0002] With the development of cities and social progress, and the country's requirements for the integration of urban and rural water supply, the number of small and medium-sized pumping stations and pressurized pumping stations with a daily water supply of less than 100,000 tons at the urban level is increasing. Due to small and medium-sized cities and a large number of county-level The capacity of water supply regulation and storage in cities is large and medium-sized cities are poor, and the coefficient of variation in water supply plants is relatively large. In addition, because the design process of pumping stations in small and medium-sized cities is based on the selection of water pumps to meet the maximum lift and maximum water supply at an hour, each pump’s The selection...

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Problems solved by technology

[0015] 2. Ignore the characteristics of urban water supply and the water supply volume is constantly changing throughout the time, and the design of the pump room only meets the maximum demand, and does not consider the corresponding plan for flow changes;

[0016] 3. Ignored the frequency conversion and constant pressure operation of the water pump, the change of the flow adjustment range, pressure adjustment range and power after the frequency conversion speed regulation of the water pump, and no corresponding plan was adopted;

[0017] 4. Ignoring the artificially set high and low peak water supply pump timing switching in order to solve the water pump running in the low flow and low frequency area, which has great blindness;

[0018] 5. Ignoring the problem of high energy consumption of water pumps running at power frequency and low efficiency of water pumps running at frequency conversion simply by power frequency + frequency conversion constant pressure control when two machines are connected in parallel or three machines are connected in parallel;

[0019] 6. Ignoring that when the water supply drops:

[0020] 6.1 Due to the large variation coefficient of water supply flow in the small and medium pump stations in the whole period;

[0022] 6.3 The design outlet pressure of the water pump is relatively large and different from the rated pressure of the water pump. After adjustment, the upper and lower limit flow of the water pump has no limit standard, and a series of problems make it difficult to ensure the timely switching of the water pump in the high-efficiency range by the frequency conversion constant pressure water supply control method

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