RU2512101C1 - Method of development of hot water counter and device for its implementation - Google Patents

Abstract

FIELD: measuring equipment.

SUBSTANCE: method of development of a hot water counter is based on using the device for switching on and off of the calculating mechanism for flowing hot water count. The calculating mechanism is switched on and off by connection and disconnection of interaction of a master and slave semi-couplings by a device containing details from nitinol - memory metal, which is used to switch on magnetic interaction of the master and slave magnetic semi-couplings as hot water flows along the counter , and to switch off magnetic interaction of the master and slave semi-couplings as cold water flows along the counter.

EFFECT: increased reliability of counter operation.

3 cl, 4 dwg

Description

This technical solution relates to a metering system for hot coolant (for example, water) both for industrial enterprises, where there is a need for accurate accounting of the flow of hot water to the consumer, and for individual consumers of apartment buildings.

By order of the Government of the Russian Federation dated 05.06.2011 No. 354, the temperature of hot water should not be lower than 60 ° C and not higher than 75 ° C in accordance with paragraph 2.4. SanPin 2.1.4. 2496 - 09. Currently, there are certified meters for calculating the consumption of cold and hot water, such as VSKM, STVU GD, STVG, VMG and others.

Any water meter of this type consists of 3 main parts: the casing, the impeller (turbine) and the counting mechanism. The principle of operation is based on the fact that water passing through the housing rotates the blades of the impeller (turbine) located in it with a speed proportional to the flow rate. The rotation of the impeller is consistent with the rotation of the leading magnetic coupling half, which synchronously transmits the rotation through the sealed non-magnetic wall of the casing to the driven part of the magnetic coupling mounted in the counting mechanism. The counting mechanism, which has a scaling mechanical gearbox, provides the conversion of the number of impeller revolutions into the measured flowing volume of water (in cubic meters and in fractions of a cubic meter). An analog of a counter of this type with a turbine is known from AS No. 947887. This type of hot water meter does not allow us to distinguish which part of the water passed through them according to the hot standard, and which part of the water passed cold, for example below 50 ° C.

A known water meter with a temperature sensor is a 4-tariff electronic LV-4T, which consists of an electronic LP calculator, a digital temperature sensor DT05 and two flow converters - PRG for installation on a hot water supply pipeline and PRX for installation on a cold water supply pipeline. The electronic calculator calculates the volume of consumed water and writes the calculated value to the appropriate tariff cell based on the actual temperature of the hot water. Volume values are recorded on an accrual basis. At the same time, from the tariff cell “Vg.v. <40 ° C” the values are not taken into account, from the tariff cell “Vg.v. <40 ° C” 40-44 ° C ”values are taken into account with a coefficient of 0.7, from the tariff cell“ Vg.v. 45-49 ° C ”values are taken into account with a coefficient of 0.9, from the tariff cell“ Vg.v.> 50 ° C ”values are taken into account with a coefficient of 1.0. The price of a basic set of a hot water meter with a temperature sensor and a calculator is 8000-9000 rubles. This method of accounting and a device for metering hot water are expensive, structurally complex and difficult to operate for consumers and regulatory authorities.

The proposed method of forming a hot water meter and a device for its implementation eliminates the disadvantages of the existing method of metering hot water consumption and allows the use of existing certified hot water meters such as VSKM, STVU GD, STVG, VMG and other similar ones with a slight structural refinement.

The objectives of this technical solution are:

- reducing the number and mass of components of hot water meters with a new method of their formation;

- exclusion of power elements from new hot water meters;

- Exclusion of electronic components from new hot water meters;

- reducing the complexity of manufacturing hot water meters and the total cost of new hot water meters, as well as operating costs for their maintenance.

This is achieved by the fact that hot water meters such as VSKM, STVU GD, STVG and VMG install a device that turns off the interaction of the master and driven magnetic coupling halves when passing through the water meter below 50 ° C and includes the interaction of the master and driven magnetic coupling halves when passing through the water meter 50 ° C and above.

The interaction of the leading and driven magnetic coupling halves is carried out due to the interaction of their magnetic elements through a non-magnetic thin partition most often from a brass alloy, from which the meter body is made. There are two ways to turn off the interaction of the master and driven magnetic coupling halves:

- increase the distance between the magnetic elements of the leading and driven magnetic coupling halves,

- brake (disconnect) the driven magnetic coupling half.

In mechanical engineering, the properties of an alloy of nitinol are known. A wire or plate deformed from its initial position in a cold state, when heated, returns an unlimited number of times to its original position, and when cooled, it returns to the same deformed position. Nitinol alloy is an alloy of titanium and nickel. Depending on the percentage of titanium and nickel from 45% to 55%, the temperature range for the restoration of the initial form of the alloy also changes.

The first way to turn off the interaction of the leading and driven magnetic coupling halves.

The leading magnetic coupling is made in the form of two nitinol rods, one ends of which are attached to the impeller, and magnetic elements are attached to the other ends of the rods, interacting with the magnetic elements of the driven magnetic coupling. Before assembling the counter, the nitinol rods of the leading coupling half are deformed, providing magnetic independence from the driven coupling half. When passing through the water meter below 50 ° C, the leading magnetic coupling with deformed nitinol beams assembled in the meter does not interact with the driven magnetic coupling, because The magnetic elements of the leading and driven half-couplings are remote from each other and their magnetic fields do not interact. When passing through a water meter of 50 ° C or higher, deformed nitinol rays with magnetic elements at the ends of the leading magnetic coupling return to their original (undeformed) position - nitinol rods return to their original position, magnetic elements of the leading coupling half enter the zone of interaction with the driven magnetic coupling half and the driven The magnetic coupling halves the counting mechanism. The meter takes into account the amount of flowing water above 50 ° C.

The second way to turn off the interaction of the leading and driven magnetic coupling halves.

The driven magnetic coupling is stopped by a deformed nitinol plate, which, when heated to 50 ° C and above, returns to its original position and releases the driven magnetic coupling, which rotates the counting mechanism. The nitinol plate, turning the driven magnetic coupling half on and off, is mounted on a non-magnetic partition made of brass alloy, which has high thermal conductivity. When passing through a water meter of 50 ° C or higher, a non-magnetic sealed baffle made of brass alloy together with a nitinol plate is heated. The nitinol plate, heating to 50 ° C, returns to its original position and releases the driven coupling half, which drives a counting mechanism that takes into account the volume of flowing water of 50 ° C and above.

The figure 1 shows a hot water meter when water passes through it below 50 ° C (the leading coupling half is disconnected).

The figure 2 shows the counter of hot water when water passes through it 50 ° C and above (the leading coupling half is included).

Figure 3 shows a hot water meter with a brake when water passes through it below 50 ° C (the driven coupling half is disabled).

Figure 4 shows a hot water meter with a brake when water passes through it at 50 ° C or higher (the driven coupling half is turned on).

The hot water meter consists of a housing 1, an impeller 2, a sealed partition made of brass alloy 3, magnetic elements 4 for the leading coupling half, magnetic elements 5 for the driven coupling half, the shaft of the counting mechanism 6, the counting mechanism 7, nitinol rods 8 (Fig. 1, 2 - for the device of the first method for the interaction of magnetic coupling halves) and nitinol plate 9 (Fig.3, 4 - for the device of the second method for the interaction of magnetic coupling halves).

The hot water meter according to the first method of turning on and off the interaction of the leading and driven magnetic coupling halves operates as follows. When water passes below 50 ° C through the housing 1 (see Fig. 1), the impeller 2 rotates with the magnetic elements 4, but they do not interact with the magnetic elements 5, because deformation of nitinol rods 8 disrupted their interaction. With the passage of water of 50 ° C and above (see Fig. 2), the nitinol rods 8 return to their original (undeformed) position and the interaction of the magnetic elements 4, 5 of the magnetic coupling halves is turned on and the driven coupling half of the shaft 6 drives the counting mechanism 7.

The hot water meter according to the second method of turning on and off the interaction of the leading and driven magnetic coupling halves operates as follows. When water passes below 50 ° C through the housing 1 (see FIG. 3), the impeller 2 rotates with the magnetic elements 4, but they, interacting with the magnetic elements 5 of the driven coupling half, do not rotate it, because a deformed nitinol plate 9 keeps its rotation, and the counting mechanism 7 does not work. With the passage of water of 50 ° C and above (see Fig. 4), the nitinol plate 9 returns to its (undeformed) initial position, releases the driven coupling half (the interaction of the magnetic elements 4, 5 of the magnetic coupling halves is activated) and the driven coupling half with the shaft 6 drives the counting mechanism 7, which takes into account water flow rates of 50 ° C and above.

This method of forming a hot water meter allows you to:

- reduce the weight and cost of components of the hot water metering system;

- exclude power elements from the design of the hot water meter;

- exclude electronic components from the design of the hot water meter;

- increase the reliability of the meter in accounting for the amount of hot water consumed by reducing the number of system elements and by eliminating the elements of the metering system that affect the reliability of the meter.

Claims (3)

1. The method of forming a hot water meter, which consists in the fact that the meter body is sealed with inlet and outlet openings, inside it with an impeller or turbine synchronously rotating with a water stream with a leading magnetic coupling with magnetic elements, transmitting the rotating magnetic coupling with magnetic elements magnetic moment through a non-magnetic partition to a driven magnetic coupling half, which transfers rotation to a counting mechanism that takes into account the volume of flowing hot water, which differs that turning on and off the magnetic interaction of the leading and driven magnetic coupling halves is performed using a device containing parts made of nitinol - a memory metal, which include the magnetic interaction of the driving and driven magnetic coupling halves when hot water flows through the meter and turning off the magnetic interaction of the leading and driven magnetic coupling halves when flowing on a cold water meter. 2. A metering device for the amount of flowing hot water, containing a sealed enclosure with inlet and outlet openings, inside it with an impeller, a leading magnetic coupling with magnetic elements transmitting magnetic torque through a non-magnetic baffle to a driven magnetic coupling, which transmits a synchronous water stream with it, to the driven magnetic coupling half, which transmits rotation on the counting mechanism, taking into account the volume of flowing hot water, characterized in that the on / off magnetic interaction of the leading and driven magnetic half the uvt is made by a device on a leading magnetic coupling half containing nitinol rods, one ends attached to the impeller, and other ends attached to magnetic elements interacting with the magnetic elements of the driven magnetic half coupling when hot water flows, and when cold water flows, the nitinol rods return to cooling initial deformed position, excluding the interaction of magnetic elements of the leading and driven half-couplings and turning off the counting mechanism. 3. A metering device for the amount of flowing hot water, comprising a sealed enclosure with inlet and outlet openings, inside it with an impeller, a leading magnetic coupling half with magnetic elements transmitting magnetic torque through a non-magnetic baffle to a driven magnetic coupling half, which transmits a synchronous water stream with it. rotation on the counting mechanism, taking into account the volume of flowing hot water, characterized in that the on / off magnetic interaction of the leading and driven magnetic half UFT is performed by a device in the form of a deformed nitinol plate mounted on an airtight partition from the outside and which, with its deformed part, stops the driven magnetic coupling and the counting mechanism due to the flow of cold water, and when hot water flows, the nitinol plate assumes an undeformed (initial) position , frees for rotation the driven magnetic coupling half and the shaft of the counting mechanism synchronously rotating with it, taking into account the flowing hot I do.

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