CN1512146A

CN1512146A - Attached micro flow meter for water meter

Info

Publication number: CN1512146A
Application number: CNA021599386A
Authority: CN
Inventors: 孙世利
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-12-30
Filing date: 2002-12-30
Publication date: 2004-07-14

Abstract

The micro flow meter is attached to available water flow meter to solve the micro flow metering problem and may be also used in eliminating the error caused by minimal flow rate. It has small volume, low cost and easy installation, and may be combined with various water meter to reach the aim of saving water resource.

Description

The additional micrometeor metering of water meter device

Technical field:

The additional micrometeor metering of the water meter that the present invention relates to device is an instrument of measuring discharge volume in the water supply pipe, and additional being installed on the water meter is used for remedying the non-metering device of water meter micrometeor, the additional micrometeor metering of main a kind of water meter device.

Technical background:

At present the damage by water of China's water supply department is more serious, accounts for greatly about the 12%-18% of water supply total amount, and its one of the main reasons is to cause because of water meter measurement precision and the defective of self.China's small diameter watermeter, it is main that what use is rotor flow velocity water meter, and it is bigger that the shortcoming of this water meter is that water pressure is lost large and small water flow measurement error, and (see Fig. 4 a, 0-Qmin) the initiating flow is higher, and to produce error in dipping also big because of the variation of water pressure.In recent years along with the improvement of dwelling house condition, a large amount of water appliances extensively enters family, because of the weeping that the poor sealing of many water appliances produces more common, also some water user utilizes the method stolen water that drips, also more common, these two kinds of phenomenons all can not be measured because of the deficiency of water meter self, because of error in dipping and the long-time non-metering accumulative total of micrometeor, make water supply department produce serious damage by water, bring very big economic loss to water supply department like this, make the water resource of country cause great waste.

Content of the present invention:

The objective of the invention is to adopt the polyphone form, on water meter, install the additional miniflow flow measurement device of water meter additional, steal not measurement problem to solve water clock and to drip, can also replenish the metering water meter minimum flow to error in dipping problem between the initiating flow, improved the measuring accuracy of water meter, effectively solved micrometeor and do not measured the damage by water of bringing to water supply department, made the damage by water consumption reduce 2%-5%, improve the water supply department economic benefit, saved water resource.

Embodiment:

When the micrometeor current when the (see figure 2) of direction shown in the arrow flows pipeline, main valve (13) is subjected to the elastic force of main valve retracing spring (12) to be closed condition, at this moment fine bourn flows through from flow-limiting valve base (19) by filter screen (20), the pressure jack-up of current is as glueballs valve (18), entering the micro-flowmeter water inlet from current limliting valve body (17) connects in the base (15), enter micro-flowmeter (8) metering by micro-flowmeter water inlet pipe (9), get back to the water supply pipe from rising pipe (7) the micrometeor rising pipe connecting screw (6) of micro-flowmeter then.At this moment current are small, and water meter can't rotate metering, thereby thoroughly solved the non-metering problem of micrometeor.In case current increase, water pressure is greater than the pressure of main valve retracing spring (12), and main valve (13) is opened, and current enter water meter measurement.When current increase, diameter (see figure 2) because of ￠ 1＜￠ 2, certainly lead to pressure differential, water pressure among water pressure＜￠ 1 among the ￠ 2, at this moment current flow through in current limliting valve body (10) at a high speed, picture glueballs valve (18) the inertia of big hydraulic pressure and current do with under move upward, get lodged in the water inlet of miniflow meter water inlet pipe connecting pipe (15) seat, because of stopping of current, micro-flowmeter (8) stops operating, will not measure, reach the metering of big flood flowing water table by above working method, micrometeor is measured by micro-flowmeter (8).Below we by contrast from the watermeter flowing rate error curve diagram of Fig. 4, can clearly see the curvilinear motion of having installed additional behind the water meter micrometeor metering device clearly, be how to replenish to measure.

Curve (A) among Fig. 4 (a) is the error curve diagram of rotor flow velocity water meter, we see, minimum flow is the beginning of metering, but the error between the 0-Qmin belongs to the zone that does not enter measuring index, once will produce first-order error with the every unlatching of taps, the number of times of opening is many more, cumulative errors are big more, if drip with the fine bourn that is lower than the initiating flow, water meter does not measure, this deficiency of water meter self just, cause drip steal, basic reason that water clock will not measure.

Among Fig. 4 (b) when the curve (B) of the micro-flowmeter that installs additional and curve (A) are made contrast, we can be clearly seen that, (B) curve has significantly replenished the error in dipping between the 0-Qmin in (A) curve, improved measuring accuracy, solved water clock and dripped to steal and do not measured, and the minimum flow additional metering of error before.

Curve among Fig. 4 (c) is that water meter and micro-flowmeter adopt the combination of complementary type and form new curve.Obviously preferably resolve deficiency between the 0-Qmin from curve Fig. 4 (c) than Fig. 4 (a).All adopt this technical scheme as national water system, only thoroughly eliminate water clock, drip and steal one, the annual water measurement of saving in the whole nation will reach several hundred million cubic meters.

Description of drawings:

Fig. 1 shape assumption diagram

1, water meter attaching nut 2, main valve pressure adjustment pipe

3, set nut 4, sealing gasket

5, trunk line pressure valve body 6, micro-flowmeter rising pipe connecting screw

7, miniflow measures water pipe 8, micro-flowmeter

9, miniflow metering water inlet pipe 10, micro-flowmeter flow-limiting valve assembly

11, trunk line water inlet

Fig. 2 micrometeor metering device cut-away view

12, main valve retracing spring 13, main valve 14, valve seat

Fig. 3 flow-limiting valve assembly cut-away view

15, the micro-flowmeter water inlet connects base 16, lock nut

17, flow-limiting valve valve body 18, as the glueballs valve

19, flow-limiting valve base 20, filter screen

Fig. 4 (a) rotor water meter error curve diagram;

(b) water meter graph of errors and micro-flowmeter graph of errors comparison diagram;

(c) error curve diagram that forms after water meter and the micro-flowmeter complementation.

Claims

1, the additional micrometeor metering of a kind of water meter device, it is characterized in that being used with water meter, under the pressure effect of main valve spring (12), make that main valve (13) is opened, closure when certain hydraulic pressure current, act on the flow-limiting valve (10) of micro-flowmeter (8), flow-limiting valve (10) can be opened and closed automatically under certain hydraulic pressure current, thus water meter measurement when reaching big current, and micro-flowmeter does not measure.Water meter does not measure during fine bourn, the micro-flowmeter metering.Make the error between minimum flow and the initiating flow obtain replenishing metering.Order ground is to reach water meter and the complementary metering method metering of micro-flowmeter employing.

2,, it is characterized in that utilizing the effect of hydraulic pressure current to make flow-limiting valve (10) open closure voluntarily as the flow-limiting valve (10) in the additional micrometeor device of the described water meter of claim (1).Picture glueballs valve (18) is in flow-limiting valve (10), and because of the effect of current moves up, the flow velocity of current and pressure are less than the proportion water conduction of picture glueballs.Flow rate of water flow and pressure move upward as glueballs greater than the proportion of picture glueballs, just in time block the water inlet that water inlet pipe is adjusted screw, and flow-limiting valve (10) is closed, and avoids micro-flowmeter to cause premature wear or damage because of overrunning, and avoid repeating metering again.

3, as the described micro-flowmeter of claim (1), it is characterized in that a kind of miniature water meter, be divided into 3 millimeters, 5 millimeters, 7 millimeters, 3 millimeters micro-flowmeters of the water meter adapted of nominal diameter 15-20 millimeter wherein, 5 millimeters micro-flowmeters of 25-32 millimeter water meter adapted, 7 millimeters micro-flowmeters of 40-50 millimeter water meter adapted.

4, the additional micrometeor metering of the water meter described in claim (1) device is characterized in that the using method of this device can be used in combination or be made of one the watermeter use with the water meter of the various bores of any kind.

5,, it is characterized in that installing with the water meter polyphone as the additional micrometeor metering of the described water meter of claim (1) device.

6, the flow-limiting valve (10) described in claim (2) is characterized in that filter screen (20) has been installed in the damage of materials such as suspension additional in order to prevent micro-flowmeter (8) by the particle in the water.

7, the flow-limiting valve (10) described in claim (2) is characterized in that utilizing the unlatching that realizes flow-limiting valve as the deadweight of glueballs.

8, the pressure adjustment pipe (2) described in claim (1) is a scalable main valve opening pressure, again can the direct and water meter butt joint by water meter attaching nut (1).

9, micrometeor metering device described in claim (1) is characterized in that changing the opening pressure of main valve (13) by adjusting the pressure that main valve pressure adjustment pipe (2) changes main valve retracing spring (12); Adjust the stroke of micro-flowmeter water inlet base (15) change as glueballs valve (18); Change is as the proportion of glueballs valve (18); Work in coordination,, flow-limiting valve is closed to reach under the flow of regulation.

10, as the described micro-flowmeter of claim (1) (8), it is characterized in that utilizing the micro-flowmeter water inlet pipe and water outlet pipe, cross-over connection is installed in main valve (13) two ends, just can play the metering to micrometeor.The micro-flowmeter measure portion still adopts the metering system of rotor flow velocity water meter.But do not establish flow adjuster.Counter portion adopts mechanical counter or adopts the electronic counter of liquid crystal display.