192 results about "Water cost" patented technology

The invention discloses a method and system for intelligently controlling temperature of concretes of a dam under construction. The system comprises a control device which communicates with a heat exchanging device and a heat exchanging auxiliary device, wherein the heat exchanging device is arranged at inner part or surface of the concrete dam, and is used for exchanging heat with the concrete dam and transmitting collected temperature information of the concrete dam to the control device; the heat exchanging auxiliary device inputs a heat exchanging medium to the heat exchanging device and outputs the medium from the heat exchanging device after the heat exchange; the control device is used for controlling the heat exchanging auxiliary device; and the control device can input a temperature control strategy of each casting bin. By the system and method disclosed by the invention, the temperature of the concrete dam can be detected in real time automatically, individualized temperature control strategies are provided to different casting bins, intelligent learning is performed according to actual conditions on site, and concrete thermal parameters which are the most accurate and realistic are selected for each casting bin, so that the precise control on water flow capacity and / or temperature can be realized, the precision for controlling the concrete dam temperature is high, the data is reliable, labour and water costs can be greatly reduced, and the anti-cracking effect of the dam is good.

An optimal thermal seawater desalination process is disclosed, which combines two or more substantially different water pretreatment processes in a unique manner and in a special configuration, hereto unknown to prior desalination arts, to produce a high yield of high quality fresh water, including potable water. In this process a two stage NF membrane pretreatment unit (NF2) with an energy recovery turbo charger (TC) device in between the stages or equipped with an energy recovery pressure exchanger (PX) is synergistically combined with at least one thermal desalination unit to form a dual hybrid of NF2-Thermal (FIG. 4 ), or alternatively the two stage NF2 unit is synergistically combined with a two stage SWRO unit (SWRO2) with an energy recovery TC in between the stages or combined with one stage SWRO (SWRO1) equipped with an energy recovery TC or PX system and the reject from the SWRO2 or SWRO1 unit is made make-up to a thermal unit to form a tri-hybrid of NF2-SWRO2 reject-Thermal (FIG. 5 ). In both the cases of di- or trihybrids the thermal unit is equivalent to a multistage flash distillation (MSFD) or multieffect distillation (MED) or vapor compression distillation (VCD) or thermal reheat (RH) evaporator. Typically a process of this invention using the two stage NF2 initial pretreatment step will perform a semi-desalination step by reducing feed TDS by about 35 to 50%, but most important, especially to the thermal seawater desalination process, it removes the water recovery limiting, scale forming hardness ions of Ca++ and Mg++ by better than 80% and their covalent anions of sulfate to better than 95% and bicarbonate to about 65%. The removal of scale forming hardness ions, especially SO4=, and bicarbonates allowed for the operation of thermal unit in the above hybrids at top brine temperature (TBT) much greater than its present TBT limit by the singular conventional process of 120° C. for MSFD and operation of MED or VCD or RH unit at TBT much higher than their present TBT limit of 65-70° C., with many advantages gained by this process over prior art sweater desalination processes. The process of this invention exceeds all prior thermal seawater desalination arts in efficiency, including water yield, product water recovery ratio and unit water cost as well as in energy consumption per unit product which is equivalent or less than other efficient prior art seawater thermal desalination processes. By this process, an NF product recovery ratio of 75 and 80% or better is achieved from the high salinity Gulf sea (TDS≈45,000 ppm) and about an equal product recovery ratio is also obtained from the SWRO or thermal unit when it is operated on NF product for a total water recovery ratio in excess of 52% for seawater

The large-scale green power, pure chilled, heated water and / or conditioned directed air are produced using wind, heat and vapor of the free humid air in the structured multi-unit space-saving vortex tower providing direct three-phase voltage induction with alternating magnetic whirl formed by pole radial self-orienting magnetic concentrators swirled via all-weather multi-step tornado-like flow supplementary energized, enhanced and controlled by a spatial system of fast directing and accelerating low-temperature steam jets injected through fleshing of recycled, separated and stored condensate slightly heated with any renewable, waste, secondary, or prime source of low-temperature heat, partly via combining with solar pond and heaters or / and geothermal media, or / and waste, secondary or initial heat of large thermal, atomic power plant or intensively energy consuming industry, reducing specific investment, energy and pure water costs, quality requirements, specific pollution and waste heat atmospheric injection, with possibilities of partial local weather corrections through conditioned directed waste tower air; a new sector with various directions can be widened, based on applying of the same principles of energizing, enhancement, control and usage of any kind of fast gaseous confined vortex flow via any kind of supplementary low-temperature steam

A convenient, easy-to-use, water-saving, and labor-saving FROG smart irrigation controller is provided, which determines the appropriate water budget for the specific geographic region based on the preloaded ETo Local Characteristic Curve and preloaded mandated and voluntary watering restrictions for the specific geographic location, with consideration given to the reduction in watering days, the increase in soil watering depth, and the day of year. Once set, the FROG provides incremental adjustments over the course of the year; the homeowner no longer needs to re-set the watering program seasonally to comply with local mandated and voluntary watering restrictions. Compliance is automatic and obligatory, meeting the water saving goals of the local water authority.

The invention provides a high efficiency sewage treatment method which comprises pre-processing, biological chemical treatment, deposition processing, deposition trash concentration disposal, and thick sludge dehydration treatment. By employing the biological method with anoxybiotic, anaerobic as the main steps and aerobic as the auxiliary step, the NH3-N, T-N and T-P in the sewage can be removed effectively, and the binding precipitant has very strong physical adsorption property.

A method of controlling the operation of a heat exchanger with evaporative and non-evaporative sections. The method includes the following steps: providing desired values of temperature or pressure; comparing present values of temperature or pressure to the desired values of temperature and pressure; and manipulating an air flowrate to the heat exchanger and load to the evaporative heat exchanger to optimize total energy and water costs while maintaining an outlet fluid at the desired temperature or pressure.

The invention discloses a humidification device for an air conditioner, the air conditioner and a humidification method of the air conditioner. The humidification device comprises a water storage tank, a water collecting disc, a humidifier and a water pump. A water storage tank water supplementing port and a water storage tank water supply port are formed in the water storage tank. A water collecting disc drainage port is arranged on the water collecting disc and communicated with the water storage tank water supplementing port. The humidifier is provided with a water inlet and a steam spray outlet used for spraying steam out and the water inlet is communicated with the water storage tank water supply port. The water pump is connected between the water storage tank water supply port and the water inlet to drive water in the water storage tank to flow into the humidifier. By the adoption of the humidification device for the air conditioner, the water collecting disc is connected to the water storage tank and is then indirectly connected to the humidifier, so that condensed water collected by the water collecting disc from the surface of an evaporator is converted into a water supply source for the humidifier, water resources are effectively used, the frequency of manual water supplementation is reduced, and water cost is saved.

Cost-effective processes and tools used therein are described that decontaminate sludge using remedial water in a closed and environmentally friendly system. Typical contaminants such as toxic metals, microorganisms, and toxic compounds are detoxified or destroyed by one or more remedial water treatments to sludge that is confined to the closed system. The closed system may comprise a covered rail road car, ISO container, or other large space into which the remedial water, and optionally, remedial gas, is applied by injection or other means. In a preferred embodiment, water is electrochemically activated at the site of use and injected through an array of pipes within the container. A large variety of other waters and combinations of water, and even air treatments are particularly useful in combination with the closed system for treating sludge. Sludges such as dredged material, human or animal waste, and soils or sediments, are particularly amenable to conversion by the materials and methods of the invention into a more beneficial end use product.

The invention discloses a water purifier and a flow billing system and method for the water purifier. The flow billing method for the water purifier comprises: a flow meter is arranged behind an RO (Reverse Osmosis) membrane, meters water flow flows through the pure water side of the RO membrane, subjects the flow to being generated into digital signals, and transmits the digital signals to a processor of the water purifier; the processor calculates and stores corresponding fees according to single-time flow information, and simultaneously sends calculated results to a remote server through a wireless communication module; or the processor utilizes the wireless communication module to directly send flow data metered by the flow meter to the server, and the server calculates the corresponding fees according to the flow data; and the server inputs account data of corresponding users according to fee information which is sent by every water purifier or calculated by the server. The flow accounting method for the water purifier can achieve the effect of calculating water fee according to the flow; and solves the problems of large reconstruction investment, large engineering difficulty, high use costs, less users with long-term use intention and many uncertain factors of water quality in a direct drinking water centralized water supply scheme.

The invention relates to a device system for online monitoring pressure and flow of supplied water in real time, which comprises a monitoring control center by wireless signal transmission and monitoring control stations dispersed and arranged for each water customer; and the monitoring control station comprises a remote signal transmission water meter (2), an intelligent data collector (3), a water guide electromagnetic valve (11), a remote control water power valve (12), a microwave data transmission radio station (6) or a GPRS / CDMA (21), a pressure sensor (4), a single input digital displaying instrument (5), a power supply I, a programmable controller (8), a sound and light alarming device (10), a common sluice valve (17), a bypass valve (18) and the like. The monitoring control center comprises a power supply II, the microwave data transmission radio station (6) or an Internet (22), an industrial controller operating software (9), the programmable controller (8), the sound and light alarming device (10) and the like. The device system can realize the functions of monitoring the pressure and flow of the supplied water of the water customer on line in real time, pre-charging water fee of the customers, automatically descending the water fee along the accumulated water consumption amount of the customer, reminding the customer of paying the water fee in advance, automatically cutting off the water supply by remote control when defaulting, automatically supplying water by remote control after payment and the like.

The invention relates to a water meter (100) which includes a flow detector (120) of a magnetism sensor (123) for detecting rpm of a water wheel (12) in proportion to flow, and an magnetism sensor (160) for detecting magnetism field acting from outside, wherein, a pre-estimate flow is displayed as a metered flow through detection to outside magnetism field of the magnetism sensor, and is used as a precautionary measure for outside magnetism field that avoid abuse water to save water fee.

The invention relates to an alkali depilation liming method of currying and processing goatskin without generating dust and vulcanization. The method is characterized in that sodium sulfide, sodium bisulfide and lime are not used; lime precipitate and residua do not appear to ensure the drained waste water to be more easily processed; the pollution to the environment in the currying process is greatly reduced. The dust skin washing which is a highest water cost working procedure is eliminated, and the saved water is about 20 percent to 40 percent of the total draining quantity of waster water. The damage to finished leather quality is reduced because of mechanical effect; the loose surface rate caused by mechanical effect is greatly reduced; the production period is also shortened; various materials are saved and the production combined cost is reduced.

The invention disclose a node water demand checking method based on water demand prior information and belongs to a water supply pipe network node water demand checking method. The method comprises the following steps of firstly, through information of a user remote-transmitting water meter, a water bill, user distribution and the like, estimating a prior water demand and a covariance matrix; through pipe network pressure and a flow sensor, acquiring the pipe network pressure, flow monitoring data and the covariance matrix; establishing a checking target function, linearizing the target function, acquiring a node water demand iteration step length, and updating the node water demand; and after each iteration is completed, calculating the gradient vector of the target function to the waterdemand, and when the die of the gradient vector is less than 1, terminating the iteration. In the method, through introducing water supply pipe network node water demand prior information, a node algorithm search space is further reduced, the inversion precision of the node water demand is increased, and a scientific basis is provided for water supply pipe network hydraulic modeling.

The invention discloses a remote water resource metering control system and method. The system comprises a cloud platform; a plurality of water supply devices, wherein each water supply device is in communication connection with the cloud platform; and a plurality of users, wherein each user is corresponding to one or more water supply devices and is in communication connection with the cloud platform. The cloud platform receives water consumption information of the water supply devices, and calculates water consumption expense of each user according to water price set for each user corresponding to the water supply devices. The metering of water cost is realized by utilizing internet of things, so that one-user-to-multiple-device metering can be realized, not only foundational water consumption metering control is realized, but also an on-site wireless intelligent center is established, use value of the device is improved, and integration, wireless and intelligentization degrees of the device are improved.

The invention discloses a novel intelligent water meter which comprises a water meter body, wherein a water inlet pipeline is fixedly connected with one side of the water meter body; an electric valve is mounted on the water inlet pipeline; a water quality detector, a controller and a flow sensor are mounted inside the water meter body; the controller is further internally provided with a CPU (Central Processing Unit); the CPU is welded with a water quality detection control unit and a water flow time node control unit; a signal emitter is connected with a water plant receiver and a user mobile phone through wireless signals. According to the novel intelligent water meter, by adopting the server, the water quality detector, the controller and the water flow sensor, the water quality and the water flow time are monitored by using the water quality detector and the water flow sensor, a water resource can be saved when the electric valve is turned off, real-time communication of the user mobile phone with the water plant can be achieved through the server, water use situations and water cost can be learned in real time after the user logs into the water use APP (Application) by scanning a two-dimensional code using mobile phone, and thus a high intelligence degree can be achieved.

The invention relates to a preparation method of a multifunctional slick water fracturing fluid drag reducer. The preparation method comprises the following steps: applying inverse emulsion polymerization reaction for compounding two non-ionic emulsifiers into a compound emulsifier, dissolving the compound emulsifier in an oily medium in the mass fraction of 0.3%, stirring for 1-2 hours under the protection of nitrogen, then adding 0.3% by mass fraction of a hydrophobic monomer, then adding 0.3-0.5% by mass fraction of a chelating agent and monomer solution of acrylamide and 2-acrylamide-2-methylpropanesulfonic acid, starting to heat, and after temperature is increased to 52-57 DEG C, adding an oil soluble initiator and a water soluble initiator in batches, and carrying out heat preservation for 8-10 hours after the initiator is completely added, so that stable water-in-oil type polymer emulsion is obtained finally. According to the invention, an inverse emulsion polymerization method is utilized, and by introducing special functional group substances and emulsifiers, a slick water drag reducer with anti-drag and discharge assisting functions is developed, slick water cost is reduced, more importantly, fluid preparation time is shortened, a fluid preparation procedure is simplified, and construction efficiency is greatly improved.

The far distance water resource information acquiring and monitoring system based on public communication network includes two parts: monitoring terminal devices and monitoring center information processing system. The monitoring terminal devices are installed in the water taking ports of the enterprises and the monitoring center information processing system are connected via public communication network, modem access system and information processing server. The present invention has the features of being electromagnetic interference resistant, waterproof and dustproof, and may be used in receiving and displaying various kinds of information from the monitoring terminals for effective control of water resource.

The invention relates to a management method and system of time-limited payment and quantity-limited water consumption, in particular to a water supply management method and system which consist of four parts which are a novel water meter, a water consumption information card, a read-write card device and computer management software, in the water supply management industry. The method is a brand new and original water supply management method, eliminating the difficulty of the collection of water fare in the case of water payment after water consumption as well as a plurality of contradictions occurring in the prior payment of water fare; the novel water meter is provided with measurement, a clock and an IC card holder, and can read the water supply deadline and the authorized water supply amount from a water consumption information card, copy the water amount to the water consumption information card and control whether to supply water; the water consumption information card is a carrier for transferring the water supply deadline and the authorized water supply amount and copying the water amount to the water consumption information card; a computer management system can realize the user information management, store the read water amount to a database by the read-write card device and write the new water supply deadline and the authorized water consumption amount to the water consumption information card.

The invention aims to provide a method for treating collophanite positive and reverse flotation beneficiation wastewater. In the method, a dual-base method is adopted to make various ions being not beneficial to a beneficiation flotation process in the wastewater precipitate to be removed. The method comprises the following concrete steps of: (1) firstly, adding refined lime to the collophanite positive and reverse flotation beneficiation wastewater for reacting to obtain a reaction system containing sediments, and marking as the reaction system 1; (2) adding soda ash to the reaction system 1 for reacting to obtain a reaction system 2 containing the sediments; and (3) making the reaction system 2 precipitate and removing the sediments to obtaine the treated collophanite positive and reverse flotation beneficiation wastewater. The wastewater treated by the process completely meets the beneficiation water index requirement, and the recovery rate of the water is not less than 99 percent. The process reduces the beneficiation water cost and meanwhile also avoids environmental pollution caused by the reason that the wastewater is directly discharged.

The invention relates to a method for managing urban water supply pipes. The method comprises the following steps: establishing a water supply pipe network geographic information system to monitor water flow data in a water supply pipe network; placing a sound sensor at each monitoring point of the water supply pipe network to collect noise values of the water supply pipe at each monitoring point in the normal state of the water supply network; calculating the leakage performance index in each pipe network region and the water resource abundance index in each pipe network region in the water supply pipe network, and determining the pipe network regions required to be treated; calculating the active leakage control operation cost and the lost water cost of each leakage point in the network regions required to be treated, and determining the leakage points required to be treated in the network regions required to be treated. The method has the advantages that the water flow data of the pipe network can be monitored, leakage conditions of the water supply pipe network are determined, and leakage treatment strategies are provided, therefore, occurrences of post-event remediation are reduced, and the water loss and the operation cost of the pipe network are lowered.

The invention relates to a wastewater treatment device and a method during the process of plating pretreatment. The wastewater treatment method of the plating pretreatment process comprises the followings steps: overflowing the turbid wastewater in a descaling bath and a rinsing tank during the metal activation into a buffer pool, concentrating the wastewater after three times of filtering, using the high-purity filtrate obtained from the concentration process as a replenishing solution, and recovering and recycling high-purity treating liquid obtained after the metal salt, metal ion and other impurities have been removed from the concentrated solution, so as to save both water and water expense. Then, the high-purity acid with the metal ions removed is recycled to save plating cost; and harmful wastewater is not drained for fear of polluting river water. Moreover, the thorough water quality management is carried out to improve the quality of electric plating.

The invention relates to a goatskin currying processing method of alkali depilation liming without dust and vulcanization. The method is characterized in that sodium sulfide, sodium bisulfide and lime are not used; lime precipitate and residua do not appear to ensure the drained waste water to be more easily processed. The pollution to the environment in the currying process is greatly reduced. The washing dust skin which is a highest water cost working procedure is eliminated, and the saved water is about 20 percent to 40 percent of the total draining quantity of waster water. The damage to finished leather quality caused by mechanical effect is reduced; the loose surface rate caused by mechanical effect is greatly reduced; the production period is also shortened; various materials are saved and the production combined cost is reduced.

The invention discloses a smart community instrument data rapid processing system and method based on edge computing, and the system comprises a plurality of edge computing servers, and each edge computing server is disposed in a corresponding residential area, and is responsible for periodically collecting the user code, water consumption, power consumption and gas consumption of each household in the residential area; each edge calculation server calculates the water fee, the electricity fee and the gas fee of the current resident according to the water consumption, the electricity consumption and the gas consumption of each resident; each edge computing server combines the calculated water fee, electricity fee and gas fee with the corresponding user code and uploads the combined data toa community cloud server, and the community cloud server stores the obtained data into a cloud database; and the community cloud server calculates an expense list corresponding to the user code according to the water fee, the electricity fee, the gas fee and the corresponding user code, and uploads the expense list to the cloud platform, and the cloud platform issues the expense list to the userclient according to a query instruction of the user client.

A method of controlling the operation of a heat exchanger with evaporative and non-evaporative sections. The method includes the following steps: providing desired values of temperature or pressure; comparing present values of temperature or pressure to the desired values of temperature and pressure; and manipulating an air flowrate to the heat exchanger and load to the evaporative heat exchanger to optimize total energy and water costs while maintaining an outlet fluid at the desired temperature or pressure.

The invention discloses a pressure storing water supply system. The water storage tank is a pressurized water storage tank(7) and the tank body is a pressure-proof sealed structure. The water supply device is further provided with an air compressor(4) and a pressure tank(5) whose tank body is also a pressure-proof sealed structure. The air compressor(4) supplies compressed air to the pressure tank(5). The pressure tank(5)is communicated with the pipeline of the pressurized water storage tank(7). Adopting above technical proposal, the pressure storing water supply system reduces the cost on water supply equipment and operation cost and saves water cost. The pressure storing water supply system is lower in fabrication cost and is convenient to install. Meanwhile, a solar cell generates electricity which is supplied to the water supply system to store pressure; therefore, using green energy, the pressure storing water supply system causes no pollution to the environment. The pressure storing water supply system suits the development of modernized new countryside and accords with national industry policy and the policy on benefit to the people.

The invention discloses a garden rainwater collection system. The system comprises a primary filter tank, a sedimentation tank, a laminated compounded filter tank; the primary filter tank is internally provided with a first separator plate and an inclined filter grid for separating the primary filter tank into a filtrate collecting zone and a primary sedimentation zone; the filtrate collecting region is internally provided with a base plate and a filter basket, and a sewage zone whose bottom is connected to a sewage pipe is formed at the lower area of the base plate; the sedimentation tank isconnected to the primary sedimentation zone through a first water pump and a pipeline, the sedimentation tank is internally provided with a fixed plate for separating the sedimentation tank into a sedimentation zone and a sludge zone, and the sedimentation zone is internally provided with an inclined tube sedimentation component; the filter tank is connected to the sedimentation zone by a second water pump and a pipeline, the filter tank is internally provided with a second separator plate for separating the filter tank into a filtering zone and a water collecting zone, a water outlet is arranged between the second separator plate and the bottom of the filter tank, and support plates and a composite filter layer are arranged in the filtering zone. The system has the advantages of low operation cost, stable and smooth water outlet, long usage time, good rainwater purifying effects, and reduced water cost of the garden.

The invention discloses an internet-of-things intelligent water meter. The water meter is provided with a water source inlet and a water source outlet; an electronic check valve and a water flow measuring device are installed at the water source inlet, wherein the water flow measuring device is used for measuring the water flow at the water source inlet. The water meter further includes an automatic measurement and calculation system and a water amount monitoring system, wherein the automatic measurement and calculation system can calculate the water charge according to the real-time flow rate, and the water amount monitoring system can monitor the water flow rate at each water outlet end in a house, the automatic measurement and calculation system, the water amount monitoring system anda 3G- or 4G-network based mobile APP form wireless interconnection. Meanwhile, the water meter further includes a background management terminal, the background management terminal, the water flow measuring device and the automatic measurement and calculation system on the water meter form wireless interconnection, and the background management terminal and the mobile APP form wireless interconnection. The water meter further discloses a management system of the Internet-of-things intelligent water meter. The internet-of-things intelligent water meter and the management system of the Internet-of-things intelligent water meter can improve residents' consciousness of saving water, and can also improve the convenience of managing personnel in the water cut-off and water use aspects, and therefore the management cost is reduced.

The invention relates to a device for recycling and reusing waste water of a household water purifier. The device overcomes the problem of direct discharge and waste of waste water produced in purification and treatment of tap water by using a water purifier in the home of a user and can effectively recycle, store and reuse waste water of the household water purifier. The device comprises a water purifier waste water storage tank, a water inlet pipeline, an overflow pipeline, a water supply pipeline, a water drawing pipeline, a vent pipe, a water drawing pipeline control valve, a washbowl water drawing branch pipeline, a washbowl water drawing control valve, a vegetable basin water drawing branch pipeline, a vegetable basin water drawing control valve, a toilet water drawing branch pipeline, a toilet water drawing control valve, a domestic water drawing branch pipeline, a domestic water drawing control valve, a building water supply system main pipe, a water supply pipeline control valve and a water supply control valve. Popularization and application of the device mean conservation of water and saving of water charge for a household; for society, with popularization and application of the device, an immense water resource saving effect can be obtained, and great practical significance and social and economic benefits can be achieved.

The invention relates to the technical field of park rainwater processing and discloses a park rainwater collecting and processing system. The park rainwater collecting and processing system comprises a rainwater accumulation tank and a water tower. The periphery of the open end of the rainwater accumulation tank is connected with a plurality of channels. The top of the rainwater accumulation tank is provided with a rainwater filtering cover. The bottom of the rainwater accumulation tank is provided with a rainwater filter. A buffer cleaning pool is further arranged under the rainwater accumulation tank. A drain pipe on the rainwater filter is communicated with the buffer cleaning pool. The buffer cleaning pool is communicated with the water tower through a main water pipe. The main water pipe is provided with a water pump. The middle of the rainwater filtering cover protrudes upwards to form a boss. The periphery of the rainwater filtering cover is provided with an annular filter tank. The open end of the annular filter tank is provided with an annular grid plate. As a result, the park rainwater collecting and processing system has the advantages of being capable of conducting layering filtering, processing and collection on rainwater in a park, saving fresh water resources and lowering the water cost of the park.

The invention relates to automatic shutdown of quantitative water supply, namely a smart quantitative water meter which can prevent from being disassembled by non-management-and-maintenance staff anda far-transmission type smart quantitative water meter. The invention adopts the way of alternative power supply for water supply and water meter circuits: supplying water when the power is cut off and supplying power when the water is cut off; turning off a valve when a circle of water supply is finished and turning on the valve for providing short-term power for circuits when collecting water charges; and the way is that: a valve, which can automatically turn off in a reverse driection without control nor power, is installed in a water meter without changing original installation length andposition, namely when the power is turned off, set water amount can be supplied and power for automatically turning off the valve is released, thus realizing that household electrical appliances can work after the power is turned off; various parts of the water meter are fixed to be a whole and a lock without a key hole is used in the water meter for wholly locking a meter shell and the various parts; control circuits are arranged in the water meter and the case of the water meter; a microelectronic circuit function block is arranged in the control circuit, which can receive command signals transmitted by various information mediums such as IC card, communication line, broadband network and the like and a mini-size motor in the water meter is controlled for conditionally turning on the valve or disassembling the water meter.