44 results about "Water age" patented technology

The invention relates to a water supply pipe network DMA automatic partitioning method based on graph partitioning. The method comprises the following steps of obtaining a water supply pipe network hydraulic model and the total daily water supply amount; setting partition parameters; partitioning the water supply pipe network hydraulic model by using a multistage recursive dichotomy algorithm according to the set partitioning parameters to obtain a partitioning result and a partitioning boundary pipe section; and taking the engineering cost of zoning transformation as a target function, takingthe fluctuation range of the pipe network pressure and the node water age as constraint adjustment, and utilizing a genetic algorithm to carry out valve opening and closing selection of the zoning boundary pipe section and installation and arrangement of the flow meter, so as to obtain a valve opening and closing selection of the zoning boundary pipe section and installation and arrangement scheme of the flow meter. According to the method, the pipe network is partitioned through the graph partitioning algorithm, due to the characteristics of the graph partitioning algorithm, the calculated amount can be greatly reduced, the calculation efficiency is high, and the partitioning result can be obtained in a short time. The engineering cost is used as a target function, and popularization inactual engineering application is facilitated.

The invention discloses a water age measurement method for a semi-closed water area. The method comprises the following steps that: firstly, establishing the hydrodynamic force mathematical model of awater area to be measured; through the hydrodynamic force mathematical model, calculating the water depth and flow velocity information of each water quality point of the water area to be measured; constructing a convective diffusion mathematical model, and setting the boundary condition of the convective diffusion mathematical model; according to the hydrodynamic force mathematical model, calculating to obtain the water level and flow velocity information of each position of the area to be measured and the boundary condition of the convective diffusion mathematical model; calculating the concentration values of a conservative substance p and a non-conservative substance r of each moment of each water quality point of the area to be measured through the convective diffusion mathematical model; according to the concentration values of a conservative substance p and a non-conservative substance r of each moment of each water quality point of the area to be measured, calculating the instantaneous water age of each corresponding moment of each water quality point of the area to be measured; and finally, according to the instantaneous water age of each corresponding moment of each water quality point of the area to be measured, calculating a time average water age in each time period of each water quality point of the water area to be measured. By use of the method, the water age of the semi-closed water area can be efficiently, conveniently and accurately calculated.

The invention discloses a waterproof structure for building expansion joints, which comprises: an elastic pad fixedly mounted on the expansion joint; a first waterproof component having a first drainage groove and a U-shaped first connecting portion; a second waterproof component, It has a second drainage groove and a U-shaped second connecting part. The structure of the second waterproof member is symmetrical to that of the first waterproof member. The first waterproof member and the second waterproof member pass through the first connecting part and the second waterproof member. The connecting parts are buckled together and fixedly installed on the elastic pad; after the first connecting part and the second connecting part are buckled together, there is a reserved gap between them. The invention can effectively solve the leakage problem caused by factors such as waterproof aging, shrinkage, cracking, and inconsistent foundation settlement coefficients, and solve the technical problem of anti-leakage of expansion joints in building spaces such as toilets, thereby effectively avoiding water leakage and damage in the later stage. A series of problems such as inconvenient maintenance can effectively reduce the cost of maintenance and repair in the later period and ensure the waterproof quality of construction.

The invention relates to a water age detection method based on a parallel primary model. The method comprises the steps of acquiring the water temperature and residual chlorine of outlet water of water supply and outlet equipment, and recording the acquisition time; carrying out a three-factor orthogonal experiment according to the collected water temperature, time and residual chlorine and the initial chlorine concentration, determining the attenuation rate of residual chlorine in the water outlet equipment, and the attenuation rate of residual chlorine comprising the rapid consumption rate of residual chlorine and the slow consumption rate of residual chlorine; establishing an Arrhenius relation model of the residual chlorine attenuation rate and the water temperature; establishing the parallel primary model according to the Arrhenius relation model to simulate the change conditions of residual chlorine and water age in the water body; and processing the parallel primary model by utilizing linear regression estimation, and approximately estimating the water age of the water outlet equipment under the condition that the current residual chlorine, the initial residual chlorine and the water temperature are known. According to the invention, intelligent and precise detection of the water age of drinking water in an urban water supply system can be realized.

The invention discloses a site selection method based on artificial water quality monitoring points of an urban water supply pipe network, which includes: simulating the hydraulic operation of the pipe network, combining with the road network to realize grid partitioning of the entire area of ​​the water supply pipe network; Residential water use; determine the number of artificial water quality monitoring points in the pipe network in each grid; determine the distribution status of network users in each corresponding block; calculate the water age at different locations in the urban water supply area and the internal network users in each grid Water age; determine the water quality monitoring points of the special pipe network; conduct big data statistics, analysis, induction, sorting, and integration on the basis of water meter information for the user's water consumption, and initially find out the artificial water quality monitoring points of the planned pipe network that meet the basic conditions; Through the hydraulic simulation of the pipe network, analyze one by one to determine the final artificial water quality monitoring points of the pipe network. Scientifically and rationally determining the layout of water quality monitoring monitoring points in the urban pipe network ensures the representativeness of water quality monitoring, and has good guiding significance for effectively grasping water quality changes in the water supply pipe network and optimizing the operation and management of the pipe network.

The invention relates to a water age control system for secondary water supply equipment. The water age control system comprises a flowmeter, a liquidometer, an adjusting valve, a pressure meter, a water tank and a controller, wherein the controller is separately connected to the flowmeter, the liquidometer, the adjusting valve and the pressure meter; an intelligent analyzing engine is arranged inthe controller, collects water consumption data of a plurality of months and predicts a water consumption mode curve based on the water consumption data of the plurality of months; and the controllerjudges and classifies the water consumption nature by the water consumption mode curve, calculates a water storage curve of the water tank according to the water consumption mode curve, then acquiresa water inflow curve of the water tank according to the water storage curve and the water consumption mode curve, and controls the adjusting valve in real time according to a target water inflow. Itis ensured that tap water in the water tank is adjusted dynamically.

The invention discloses a water age measurement method for a semi-closed water area. The method comprises the following steps that: firstly, establishing the hydrodynamic force mathematical model of awater area to be measured; through the hydrodynamic force mathematical model, calculating the water depth and flow velocity information of each water quality point of the water area to be measured; constructing a convective diffusion mathematical model, and setting the boundary condition of the convective diffusion mathematical model; according to the hydrodynamic force mathematical model, calculating to obtain the water level and flow velocity information of each position of the area to be measured and the boundary condition of the convective diffusion mathematical model; calculating the concentration values of a conservative substance p and a non-conservative substance r of each moment of each water quality point of the area to be measured through the convective diffusion mathematical model; according to the concentration values of a conservative substance p and a non-conservative substance r of each moment of each water quality point of the area to be measured, calculating the instantaneous water age of each corresponding moment of each water quality point of the area to be measured; and finally, according to the instantaneous water age of each corresponding moment of each water quality point of the area to be measured, calculating a time average water age in each time period of each water quality point of the water area to be measured. By use of the method, the water age of the semi-closed water area can be efficiently, conveniently and accurately calculated.

The invention discloses a polyvinyl chloride (PVC) material for a high-speed data cable. The polyvinyl chloride material is characterized by comprising the following components in parts by weight: 100 parts of PVC resin, 32 parts of trioctyl trimellitate, 5 parts of a calcium zinc stabilizer, 8 parts of antimony sesquioxide, 0.4 part of a lubricant, 0.2 part of an antioxidant and 10 parts of a water-resistant modifier, wherein the water-resistant modifier is formed by coating 2 parts of nano barium sulfate, 5.7 parts of calcined kaolin and 2 parts of nano silicon dioxide with 0.3 part of a silane coupling agent; and the lubricant is selected from one or more of stearic acid, barium stearate, calcium stearate, paraffin and polyethylene wax. According to the PVC material, the data cable can be used in a water-soaked environment for a long term; the mechanical stability is good, the electrical performance is stable, and the water ageing resistance performance and the water tree forming resistance performance are achieved in a wet environment, so that the stability of the data cable is further improved and the service cycle of the data cable is further prolonged.

The invention discloses a drinking water disinfection byproduct prediction method and system. The method comprises the following steps: acquiring water age prediction data of drinking water to be predicted and water quality data of the drinking water to be predicted; and inputting the water age prediction data and the water quality data into an adaptive genetic BP neural network model for predicting the drinking water disinfection by-product to obtain a drinking water disinfection by-product prediction value. By adopting the drinking water disinfection byproduct prediction method and system, the disinfection byproducts in the water supply pipe network can be efficiently and economically predicted.