JPS6157193U

JPS6157193U -

Info

Publication number: JPS6157193U
Application number: JP14273684U
Authority: JP
Priority date: 1984-09-20
Filing date: 1984-09-20
Publication date: 1986-04-17

Description

[Brief explanation of drawings]

第１図は本考案のポンプ吐出圧制御装置の一実
施例のブロツク図、第２図は従来装置のブロツク
図である。図中、１は配水池、２，３，５_１，５_２，…５
_ｎは制御弁、４_１，４_２，…４_ｎは送水ポンプ、
６は吐出圧検出器、７は流量検出部、８は流量発
信器、９はポンプ吐出圧・推定末端圧制御装置、
９ａは推定末端圧演算器、９ｂはポンプ吐出圧制
御器、１０は電動機速度制御装置、１１_１，１１
_２，…１１_ｎはポンプ駆動用電動機、１２は配水
管、１３は配水区域、１４は吸込圧力計、１５は
ポンプ台数制御器、１６はポンプ起動停止回路、
Ｓ_１，Ｓ_２，…Ｓ_ｎはスイツチである。 FIG. 1 is a block diagram of an embodiment of the pump discharge pressure control device of the present invention, and FIG. 2 is a block diagram of a conventional device. In the figure, 1 is a water distribution reservoir, 2, 3, _{5 1} , 5 ₂ ,...5
_n is a control valve, 4 ₁ , 4 ₂ ,...4 _n is a water pump,
6 is a discharge pressure detector, 7 is a flow rate detection section, 8 is a flow rate transmitter, 9 is a pump discharge pressure/estimated terminal pressure control device,
9a is an estimated terminal pressure calculator, 9b is a pump discharge pressure controller, 10 is a motor speed controller, 11 ₁ , 11
₂ ,...11 _n is a pump drive electric motor, 12 is a water pipe, 13 is a water distribution area, 14 is a suction pressure gauge, 15 is a pump number controller, 16 is a pump start/stop circuit,
S ₁ , S ₂ , . . . S _n are switches.

Claims

[Scope of Claim for Utility Model Registration] A system for controlling water supply from a water distribution reservoir to a water distribution area through a water distribution pipe so as to maintain a constant water pressure at the end thereof, comprising a plurality of water supply pumps, and the water supply pump. Suction pressure detection means disposed on the suction side; Discharge pressure detection means and flow rate detection means disposed on the discharge side of the water pump; The output of the suction pressure detection means, the output of the flow rate detection means, and the water pipe. Pump discharge pressure/estimation comprising an estimated terminal pressure calculation means for calculating a set value of the discharge pressure of the water supply pump from the pipe resistance of the pump, and a pump discharge pressure control means for calculating a deviation signal from the set value and the output of the discharge pressure detecting means. a terminal pressure control device; a speed control means for controlling the speed of the plurality of electric motors connected to the water pump based on the deviation signal of the control device; and a speed control means for controlling the speed of the plurality of electric motors connected to the water pump based on the output from the flow rate detection means. A pump discharge pressure control device comprising: pump number control means for generating a control signal for determining the optimum number of water pumps to be operated; and switch means for controlling drive of the electric motor based on the control signal from the pump number control means.