Jul 30 2014

The characteristics of prepayment water meter, installation notes, classification, use and disposal of common problems

The traditional “water first, pay after” into “first payment, after the water”, to effectively solve the charge problem. The detailed design process uses the EM78 series single-chip design of specific hardware circuit diagram and software is given..

prepayment water meter

(1) does not need manual meter reading, and is conducive to modern management. With the “one table” one household, the meter number of power supply enterprise management has increased dramatically, the installation of prepayment electric energy meter is used for

Strengthen the modernized management of electric enterprises, improve the service level of a best choice. The use of prepayment electric energy meter also avoid manual meter reading to the inconvenience charges to bring customers, and historical data can prepayment water meter, easy for customers to query.

(2) fully reflects the commodity attribute of water. Prepaid water meter according to the principle of commodity exchange, the first water after the water, completely changed the traditional water charging mode, fully embodies the commodity property of hydraulic. Customers can according to their actual needs to plan to buy water, water, no late fees and because of arrears, adding unnecessary expenses.

(3) to solve the problem of fees. 1, the use of radio frequency card, without any exposed electrode, moisture-proof performance, easy to use.

2, through the double key encryption card, a card a secret.

3, with a card table, or a card table function.

4, with the remaining water is insufficient, prompting the user to buy water.

5, with the battery voltage is too low, to prompt the user to replace the battery.

5, with the battery voltage is too low, to prompt the user to replace the battery.

6, has the data read back, when the user card to the management center for water, can use the card corresponds to the cumulative water consumption in the water meter, battery status, interference frequency read back to the management center.

7, small starting flow, high precision.

8, display function: surplus for the purchase of water, water, with a total content and other parameters can be effectively displayed on the LCD screen, the user can through the user card check table in the surplus water and total water use information.

Installation:

Installation:

1, choose water should be used according to the pipeline flow less than or close to common flow meter is appropriate, not only to determine the water pipe diameter.

2, the installation location to avoid light pollution, drying, freezing, the frozen period, in addition to water pipes wrapped insulation, when not in use the water inlet end of the valve is closed, the outlet valve and open the water tap, can prevent water frost damage.

The meter must be installed level, so that the literal upward.

Installation of piping must be inside the tube gravel, silt, hemp and other debris washed clean after the installation of water meters, so as to avoid the water meter malfunction.

Installation of piping must be inside the tube gravel, silt, hemp and other debris washed clean after the installation of water meters, so as to avoid the water meter malfunction.

In order to measure accurately, the tap should be higher than the water.

The water meter installed on the boiler into such as pipes, should be installed check valve, prevent the return of hot water scalding water.

The water should not be directly connected with the pipeline, water meter and the pipeline should active interfaces (such as pipe joints, connecting screws, over the sealing gasket etc.). The installation of brass body IC card water meter, should not be excessive force caused by pipe and pipe fitting, so as not to damage the water meter.

The meter must be installed in the floor drain and smooth drainage.

The meter must be installed in the floor drain and smooth drainage.

Seven, transportation and storage

1, the water transportation should not be subject to severe shock. Save water meter should be in the original packaging, preservation of the local environmental temperature 0 ℃ -60 ℃, relative humidity below 95%, non corrosive gas in the air.

The water in the warehouse storage, stacking height of not more than 10 box, water meter stack single package put height of not more than 10, not only the water meter packaging open storage.

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Jul 24 2014

Processing method of Rotary Volumetric Piston Water Meter installation techniques, characteristics, operation process, working principle and common problems

Volumetric meter is also called the piston type water meter, is a constant flow type water meter. The national standard in the volumetric meter is defined as “installed in the closed pipe, by some to be a water meter chamber volume successive full known and discharge fluid and with fluid driven mechanism.

Rotary Volumetric Piston Water Meter

Volumetric meter with rotary piston type and disc type two series, when the water flow through the meter, the drive piston flow (circleRotating disc) (swing), and a piston cylinder (disk chamber) volume is constant, so, by counting the measured piston rotation mechanism

Turn (disc swing) times, can get through the Rotary Volumetric Piston Water Meter of water.

Product volume type water meter is the main rotary piston type water meter, see figure C.5 and figure C.6 appendix C. At present is mainly used for the measurement of pipeline pure water, water purification water to produce drinking water meter water Limited by Share Ltd Ningbo and Ningbo Donghai instrument channel limited company as the representative, in the water meter diameter is 8, 15 and 20ram. Volumetric meter repair debugging complex, high requirement on quality, used in China has not yet been widely. Under the action of water pressure, water from the lower water inlet into the measurement chamber, center 3 driven rotary piston 7 surround the measurement chamber shaft to rotate, and the water from the piston blank and piston and the measuring chamber wall surface formed by the air flows to the upper outlet, at the same time the piston rotates, connected by a rotating shaft 4 and shifting fork 5 and counting mechanism, so as long as the note of piston rotation times, can flow through the water volume. Under the action of water pressure, water from the lower water inlet into the measurement chamber, center 3 driven rotary piston 7 surround the measurement chamber shaft to rotate, and the water from the piston blank and piston and the measuring chamber wall surface formed by the air flows to the upper outlet, at the same time the piston rotates, connected by a rotating shaft 4 and shifting fork 5 and counting mechanism, so as long as the note of piston rotation times, can flow through the water volume.

Volumetric meter with rotary piston type and Yuan Pan type two series, its principle is, when the water flow through the meter. The drive piston flow (Yuan Pan) rotation (swing), and the piston cylinder (Yuan Pan chambers) volume is constant, so, by counting mechanism measured piston rotation (Yuan Pan wobble) number it can obtain the flow through the water, water meter.

Requirements of installation and operation:

Requirements of installation and operation:

A, flow direction must be with the table on the arrow direction; B, the installation position to avoid pollution and flooding

This table for the Rotary Volumetric Piston Type Plastic Water Meter, the piston principle, through the rotation of the piston to measure the amount of water through the pipe.

Housing for the pressure casting of brass or stainless steel precision casting, internal main parts use of carbon composite materials, the counter is fully enclosed structure, flow into a eight bit digital recording.

Measurement grade this table for the C class, high sensitivity, small starting flow, clear reading, easy to install, without any range limit.

Measurement of the surface is most suitable for direct drinking water.

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Jul 07 2014

introductionCombination Cold Water Meter classification, main control parameters and the implementation of standards

Water meter according to the medium temperature can be divided into cold water and hot water meter, water temperature 30 ℃ is the dividing line between the cold water meter: medium lower temperature is 0 ℃, the upper limit temperature is 30 ℃ water meter.

Combination Cold Water Meter

The main control parameters of cold water meter was chosen for water flow, flow, flow, overload, minimum flow boundary flow, nominal pressure, the maximum allowable working pressure, pressure loss.

Cold water meter main classification:

According to the different ways into the installation: horizontal, vertical water meter cold water meter.

According to the wing wheel structure is divided into: Woltman water meter, rotor type water meter.

In accordance with the immersion method counting machine is divided into: dry wet water meter, Combination Cold Water Meter.

Selected points:

1), water meter selection must first consider the water meter working environment: such as water temperature, working pressure, time, measurement range and the water quality of water were selected, then press through the design of flow meter, water meter pressure loss to produce close to and do not exceed the specified value to determine the water meter diameter. In general, nominal diameter less than DN50, should use the rotor type water meter; nominal diameter is more than DN50, should use the spiral wing type water meter; flow meter should be used when the variation range of compound water meter.

2), nominal diameter less than DN50 of the water meter, should according to the water supply system design flow using.

3), should be preferred dry water meter. In the non heating area specified by the state, and extreme minimum temperature below -4 ℃, indoor public part of the household water meters or adjacent to the northwest side wall should be used dry water meter, water meter. Such as the use of wet water meter should do heat preservation.

Edit the construction, installation points

1) General requirements

(1) the water should be easily accessible for reading (for example, do not use a mirror or a ladder), assembly, maintenance, disassembly and necessary “in situ” removing mechanism. In addition, on the quality of more than 25kg of the water meter shall be unhampered access to the installation site, so that the water meter can be attached to its working position or removed and the surrounding in the working position to provide appropriate space to install the lifting device and should consider the following points:

Need proper lighting installation location;

The floor should be no obstacles, and even hard and not slip.

(2) in all cases, especially in the table wells installed water meters off the ground, application of high enough to install water meters and fitting method to avoid contamination. When necessary, the table well should provide a clarifier or gutter drainage.

2) installation requirements

(1) the water meter should prevent to cause damage risk by the installation place around impact or vibration.

(2) the water cannot be caused by excessive stress of pipe and fittings. When necessary, the Woltman Type Bulk Water Meter should be installed in the base or carrier. In addition, the upstream and downstream should be properly fastened on one side, to ensure open or discharge water table, not by the stem the impact of water facilities for the moving parts

(3) the water meter should prevent the risk of damage caused by the limit temperature of water and the surrounding air.

(4) the water meter should prevent flood and rain.

(5) the water direction should be in conformity with the type.

(6) the water meter should prevent damage danger caused by external environmental corrosion.

(7) should always comply with the use of water as the ground of effective national laws and local regulations. The water meter as an electrical ground parts, in order to minimize the risk of operating personnel, the water meter and the connection bypass pipe should be permanent.

(8) in order to prevent the hydraulic conditions unfavorable (cavitation, surge and water hammer) caused water damage, preventive measures should be taken to.

(9) when necessary, measures should be taken to avoid sudden changes, close to the water meter flow section.

(10) spiral wing type water meter (also known as v Manchester meter) special installation requirements: the water meter disturbance on the upstream flow is sensitive, which cause large error and early wear. Flow under two types of perturbation velocity distribution and vortex distortion. The typical velocity distortion is caused by partially blocking the tube disorders, such as some closed valve, but this effect can be easily reduced to a minimum. The vortex is mainly caused by two or more elbow on different planes, this effect can be used to ensure the water upstream straight pipe have long controlled; if this is not possible, then install a straightening device.

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Jul 04 2014

Characteristics of the solution, the Turbine Woltman Type Water Meter performance parameters, common problems and development

Level Woltman water meter, also called vortex type water meter, water meter refers to the helix axis and the water pipe Zhou Xiancheng parallel (or overlap), the impeller adopts spiral wing shape. This is not to say that the level of the water meter can be installed. Of course, such as the water meter to vertical installation, should the water jewel plain end bearing selection inlet side spiral shaft bearing hole, in order to reduce friction, prolong the service life of the water meter. Imports of some types of spiral wing type water meter adopts dynamic balance technology, can work in horizontal, inclined and vertical state, but the class of measurement work in non horizontal state when the water to reduce the level of.

Turbine Woltman Type Water Meter

In the case, cover, table glass and a sealing washer together to form a sealed body, make the case within the tested water without leakage to the outside. According to the standard requirements, the Turbine Woltman Type Water Meter should be able to withstand the pressure of 1.6MPa, sustained pressure test pressure of 2.OMPa, 15min and 1min continued. Therefore, in the case, cover and table glass shall meet the requirements. The watchcase hole shall be lined with resistant liner rot material made of or coated with antirust coating with good.

Rectifier functions: one is to come from water upstream in turbulent flow in the rectifier through the grid, as far as possible the “out” into the state of laminar flow; two is provided with a shaft hole in the center rectifiers, to support the spiral shaft, axle hole and the shaft hole on the bracket should be coaxial, in order to ensure the spiral wing flexible rotation.

The role of stents: on the one hand supporting the helix axis, so that the spiral wing can rotate flexibly under flow action; on the other hand through a worm and worm wheel bracket and screw wing shaft is engaged, the spiral wing speed to the upper part of the bracket is connected with a counting mechanism.

Water meter Woltman water meter using spiral plate shaped impeller, also called spiral wing or wing wheel, enough mechanical strength engineering plastic generally use (such as ABS) injection molding. Spiral tube body is a hollow, to reduce weight and increase buoyancy. Spiral wing end is provided with a cover adhesive binder and, in case the measured water immersion after the increase of weight. Spiral wing has better dynamic balance performance, or when the high-speed operation, easy to make the spiral shaft and sleeve wear.

Common error adjusting device two.

(1) paddle error adjusting device

In part this adjustment device is a piece of flat and symmetrical paddle shaped adjusting plate, rectifying plate is positioned in the rectifier part. When the rotating paddle shaped adjusting plate, it can increase or decrease this part of water flow to the spiral rotation impact, thus plays the role of error. Paddle shaped error adjusting device has the advantages of Woltman Type Bulk Cold(Hot) Water Meter, less components and easy processing and convenient assembly and disassembly, so widely used.

(2) the rudder type error adjusting device

The regulating device role is part of a flat plate, plate is provided with a shaft hole, the adjusting plate is arranged on the rectifying plate rectifier for shaft parts. The regulation error, a shaft on the other side the rudder shape adjustment plate, so that the adjusting plate around the axis of rotation, to increase or decrease the water flow to the spiral rotation impact, thus plays the role of error. The adjusting device is complex.

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Jul 01 2014

AMR Remote Reading Brass Cold Water Meter works、table outlining the characteristics and advantages

Summary

In recent years, with the domestic water supply industry “a form of” carrying out, tap water charge system is an important reform, at the same time meter number increase, meter reading workload increases day by day, centralized meter reading to advance work efficiency and service level meter reading technology, has become the consensus of the water supply industry.

AMR Remote Reading Brass Cold Water Meter

The necessity of AMR Remote Reading Brass Cold Water Meter using the industry company

1, centralized meter reading system can realize monitoring, the fault can be found in a timely manner. For a city if all adopt the automatic meter reading mode after inspection is a can not be ignored.

2, centralized meter reading system can use is now very mature long-distance communication system, such as GPRS, broadband network, ADSL, mobile phone text messages and other methods to achieve the city’s network, and has been widely used in the bank for collection charges of governance, the meter reading and charging link to realize completely automation.

3, a water supply part can provide better and more perfect service, also can get more accurate water demand, especially for trade or industrial water meter.

4, centralized meter reading system can simplify the supply part of the management level, reduce or even eliminate the divided charges management business sites that require more than one person, the full realization of network governance.

5, because the centralized meter reading is an independent product, life can do and consistent base table, so the water supply part can be justifiably extraction of repair funds, so as to realize the sustainable operation table.

Begin from ninety time end, most city water supply company can not increase the number of meter reading staff, progress meter reading efficiency, different degrees on the meter and the meter reading system made active attempts, the most for pulse sender Electronic Remote Reading Water Meter, the system structure of pulse signal type water meter + collector. By running the tests for more than ten years, measuring the system correctness, poor reliability, low maintenance workload and other issues are completely unmasked, directly affect the popularization and application of remote meter.

In recent years, a new photoelectric direct reading remote meter reading technology — reading technology, has been quietly rising and a large number of applications, is increasingly becoming the city water supply company of choice.

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