CN103290884A

CN103290884A - Method for synchronously adjusting flow of multiple tail end branch pipes of water supplying system

Info

Publication number: CN103290884A
Application number: CN2013102604641A
Authority: CN
Inventors: 余学军; 张智勇; 刘通
Original assignee: CHANGSHA MOUNTAIN WATER ENERGY-SAVING RESEARCH INSTITUTE Co Ltd
Current assignee: CHANGSHA MOUNTAIN WATER ENERGY-SAVING RESEARCH INSTITUTE Co Ltd
Priority date: 2013-06-27
Filing date: 2013-06-27
Publication date: 2013-09-11
Anticipated expiration: 2033-06-27
Also published as: CN103290884B

Abstract

The invention discloses a method for synchronously adjusting flow of multiple tail end branch pipes of a water supplying system. The method includes the steps of enabling a difference value A of a flow fluctuation maximum value and a flow fluctuation minimum value when the water supplying system operates before adjustment to serve as a basis, under the condition that opening degrees of valves on the other tail end branch pipes are kept unchanged, adjusting the opening degree of a valve on one tail end branch pipe to enable flow of the tail end branch pipe to be designed flow or remolded flow, then adjusting the opening degree of a valve on a main pipe of the water supplying system to enable a flow increase-decrease difference value of the main pipe and a flow increase-decrease difference value of the tail end branch pipe to be synchronous, when the absolute value of a difference value between the flow difference value of the main pipe and the flow difference value of the tail end branch pipe is smaller than or equal to a half of the difference value A, completing adjustment on the flow of the tail end branch pipe, and completing adjustment on flow of the other tail end branch pipes one by one in the same manner. The method for synchronously adjusting flow of the multiple tail end branch pipes of the water supplying system has the advantages of being easy and convenient to operate and accurate in tail end flow distribution.

Description

The method of the how terminal arm adjusted in concert of a kind of water system flow

Technical field

The invention belongs to the water system flow rate adjusting method, be specifically related to the method for the how terminal arm adjusted in concert of a kind of water system flow.

Background technology

No matter be that recirculating cooling water system or tap water supply system major part contain a plurality of terminal arms, the terminal arm valve of adjusting all can be run into to reach the purpose of regulating each end branch's arm flow by these systems.Traditional method is exactly to regulate end branch's arm valve size aperture in turn, when the flow of this arm meter readings and design equates and adjusts simultaneously and be responsible for that valve keeps and arm flow equivalent when increasing and decreasing, with regard to the fixed valve aperture, regulate the another one arm, by that analogy each end branch's arm is all regulated once, and then regulated again until qualified in order again.The problem that this method exists is, when adjusting one when terminal, because whole system is to constitute (flow and pressure dependence) by some 2 power curves, so be certain to cause that flow and pressure that other are terminal change, finally can only reach much the same result, the flow that can't accurately distribute each end branch's arm, and adjustment process is very loaded down with trivial details, be through repeatedly debugging repeatedly.

Summary of the invention

The objective of the invention is the defective at the prior art existence, propose a kind of assignment of traffic easy and simple to handle, terminal method of the how terminal arm adjusted in concert of water system flow accurately.

The technical scheme that realizes the object of the invention employing is as follows:

The method of the how terminal arm adjusted in concert of water system provided by the invention flow, be that the difference A of flowed fluctuation maximum value and minimum value when moving before adjusting with described water system is as foundation, under the constant situation of the aperture that keeps the valve on other terminal arm, regulate the aperture of the valve on one of them terminal arm, and by the cmf record on this end arm should end arm flow changing value, make the flow of this end arm adjust to design discharge or when transforming flow, adjust the aperture of the valve on the water system person in charge again, be responsible for the changing value of flow by the cmf record on being responsible for, make the increase and decrease difference of the person in charge's flow increase and decrease difference and this end arm flow synchronous; When the absolute value of the difference of the difference of the difference of being responsible for flow and this end arm flow be less than or equal to described difference A 1/2 the time, finish the adjusting of this end arm flow; By that analogy, finish the adjusting of other terminal arm flow one by one.

Flow meter on the described person in charge is located at before the valve on this person in charge, and the flow meter on the described terminal arm is located at before the valve on this end arm.

Beneficial effect of the present invention:

1, the inventive method is simple and easy to do, and having solved prior art well, can't to make each terminal arm flow reach accurate distribution, operating process very loaded down with trivial details and will be through the problem of debugging repeatedly repeatedly.

2, the inventive method regulates after the terminal arm, and being responsible for valve under most of situation is not standard-sized sheet, can provide basis and condition for the energy saving of system transformation like this.

Further specify technical scheme of the present invention below in conjunction with accompanying drawing.

Description of drawings

Accompanying drawing is the cooling circulating water system schematic diagram.

The specific embodiment

It now is the method that example illustrates the how terminal arm adjusted in concert of water system flow with the cooling circulating water system.

As shown in drawings, cooling circulating water system comprises the cooling end 10 that follows pond 12, ring water cooling tower 1, pump group 11 and each pump motor group 2 thereof, is made up of the

terminal arm

7,8,9 of 1#-3#; Wherein be responsible for flow meter 3 on 13 and be located at before the valve of being responsible on 13 4, the flow meter 5 on the terminal arm 9 of 3# is located at before the valve 6 on this arm, and the flow meter on the

terminal arm

7,8 of 1#-2# is located at respectively before the valve on its terminal arm.

The difference of flowed fluctuation maximum value and minimum value was A when cooling circulating water system moved before adjusting.Under the constant situation of the aperture of the valve on other terminal arm, adjust terminal arm 9 flows of 3# earlier, regulate the aperture of the valve 6 on the terminal arm 9 of 3#, at this moment the flow meter 5 on should the end arm will change (when other installs when constant, terminal arm valve 6 apertures reduce, then a terminal flowmeter for pipe 5 reduces, terminal arm valve 6 apertures increase, then a terminal flowmeter for pipe 5 increases), changing value by flow meter 5 these end arm flows of record, when the flow of this end arm is adjusted to design discharge or is transformed flow, adjust the aperture of being responsible for the valve 4 on 13 again, utilize to be responsible for flow meter 3 records on 13 and to be responsible for the changing value of flows, make the increase and decrease difference (namely with increase or reduce together) synchronously of being responsible for 13 flow increase and decrease difference and this end arm flow.

If the changes in flow rate value of the terminal arm 9 of 3# is A ₁, the person in charge 13 changes in flow rate value is A ₂,

When | A ₁-A ₂| during≤A/2,

The absolute value of difference of namely being responsible for the difference of the difference of flow and arm flow is less than or equal to 1/2 o'clock of difference A, and flow system flow is regulated in a basic balance and safety, has so just adjusted the flow of 3# end arm.

By that analogy, can adjust the terminal arm 8 of 2#, 1#, 7 flow one by one and be responsible for 13 flow, their flow be increased on an equal basis fall, finish the adjusting of these terminal arm flows, can reach the whole system hydraulic equilibrium like this.

Claims

1. the method for the how terminal arm adjusted in concert of a water system flow, it is characterized in that the difference A of flowed fluctuation maximum value and minimum value when moving before adjusting with described water system is as foundation, under the constant situation of the aperture that keeps the valve on other terminal arm, regulate the aperture of the valve on one of them terminal arm, and by the cmf record on this end arm should end arm flow changing value, make the flow of this end arm adjust to design discharge or when transforming flow, adjust the aperture of the valve on the water system person in charge again, be responsible for the changing value of flow by the cmf record on being responsible for, make the increase and decrease difference of the person in charge's flow increase and decrease difference and this end arm flow synchronous; When the absolute value of the difference of the difference of the difference of being responsible for flow and this end arm flow be less than or equal to described difference A 1/2 the time, finish the adjusting of this end arm flow; By that analogy, finish the adjusting of other terminal arm flow one by one.

2. the method for the how terminal adjusted in concert flow of water system according to claim 1 is characterized in that flow meter on the described person in charge is located at before the valve on this person in charge, and the flow meter on the described terminal arm is located at before the valve on this end arm.