CN2145368Y - Reading channel water-meter - Google Patents

Abstract

The utility model provides a channel water meter in which the error of measuring accuracy is less than 5%, and the total amount of flow of a channel is read directly from a dual display. The utility model can be used in an open channel, a pressure pipe, and an underground buried pipe. The utility model comprises a water passing device (1), a counter (4), a regulator (6), and reading displayers (13), (19). A reading can be displayed in two digital display methods respectively through an electronic screen and a rotary wheel counter which has the function of multiple water draining accumulation. The channel water meter can automatically work with direct current as working power supply.

Description

Reading channel water-meter

The utility model relates to a kind of water meter that irrigation canal is crossed water inventory of measuring, particularly a kind of sampling conversion method with theoretical foundation, trueness error＜5%, again can direct reading water meter.Be suitable for 0.5M ³The water inventory of crossing of open channels such as following of/S flow, bucket, farming is measured, and can be used for pressure pipeline and sub-irrigation hidden pipe again.

Past, China adopted unit interval inflow-rate of water turbine and overcurrent time to calculate water inventory more, but in actual use, because the control sluice open degree changes, upstream or the variation of downstream water consumption cause the instability of flow situation all can't measure one by one.Can only adopt the flow rate calculation value of flow whole or a certain irrigation phase of replacement sometime roughly, resultant error is bigger.This computing method because of the needs process converts, just can obtain Total Water, are difficult for being accepted also unfavorable using water wisely, waste water resource by mass peasants.

By retrieval before 86 years in early March, 92, the domestic utility model application bulletin of announcing by State Patent Office once, it is 20 multinomial that the project that relates to the canal water gauging facility amounts to.Wherein with the utility model thinking approaching have 4, and with " pipeline low-resistance water flow measuring instrument " ［ numbering: G01F1/34 on September 28th, 91 by No. 38 (volume two) total No. 311 announcements of the 7th volume, application publication number CN2085057U, No. 90224868.5 ］ patent is more roughly the same.Hydraulics proportional sampling mode commonly used is also adopted in this design equally, then with water meter conversion, meter reading.But it has following weak point: the first, by the arc step pressure reduction is set, the stopple coupon intake-outlet does not meet the requirement of Bai Nuoli equation in theory with the water pipe potential energy is inconsistent excessively, can't reach high precision, and measuring error is bigger.The second, this design fails to be provided with the sampling regulator, can not obtain specific sampling ratio constant, can't realize direct-reading, and must multiply by the proportionality constant of calibration by the difference of reading of counter, just the water amount that can obtain being similar to.Three, have only a cover counter, when any fault appears in counter itself, all can stop numeration.

Task of the present utility model is to provide a kind of trueness error the less channel water meter that can directly show water inventory again with numeral, for irrigated area scientific management water resource, and using water wisely and calculation side's meter water rate.

Task of the present utility model is finished as follows, one resistance circle of a certain ad-hoc location setting in crossing hydrophone, and an aperture is opened in the corresponding hydrophone central horizontal position of crossing on the water blocking ring.When current passed through hydrophone, because of existing, water blocking ring cause flow velocity to increase, and aperture place hydraulic pressure reduces, forms pressure reduction.Connect with aperture at mistake hydrophone arranged outside one cover proportional sampling counter pipeline.The sampling import was arranged on the leading edge locus of hydrophone central horizontal elevation.At this moment it is identical with the residing potential energy of the import or export of sampling counter to cross hydrophone.Meet flow energy equation (Bai Nuoli equation) requirement.So sampling ratio is stable, error is less.When current passed through hydrophone, the sampling current will pass through the counter pipeline with potential energies such as crossing hydrophone.Then but counter pipeline proportional sampling is also counted.Then, regulate the ratio value of sampling with regulator, general ratio value 1:1000, like this water amount of counter be exactly hydrophone cross water inventory 1/1000.The direct water amount of read-out counter, just knowing the water amount of hydrophone does not need any conversion yet.

Crossing hydrophone is garden shape or the rectangle short tube that cast iron is cast.

Counter is made up of rotor, transmission gear and magnetic switch.Magnetic switch and display link, with powered battery of 2 joints.When counter passed through 1/1000 cubic metre of water, magnetic switch moved once, and display is counted once, and promptly channel is crossed one cubic metre in water.

Display is made up of electronic calculator and 6 runner digital counters.Wherein electronic console can show continuously once from opening a sluice gate the water inventory of crossing of barrier gate.Its by the every action of magnetic switch once, electronic calculator " ∑+" keyed jointing is logical once, the display numeral that adds up stops counting after the cutout of channel closing control lock.Meanwhile, the every action of magnetic switch is once dialled swing with the coaxial electromagnetism of 6 runner digital counters and is done once, and individual position runner advances a units.Itself and electronic console carry are synchronous.Because electronic calculator has self-closing function, so display only shows that certain once irrigates the water inventory of crossing of process, only for managerial personnel's field notes usefulness.6 runner digital counters then have repeatedly interrupted tally function, therefore can write down the annual water inventory of crossing.Owing to have two kinds of Presentation Functions, when a kind of breaking down wherein, counting still can regular event, and this kind method of counting is directly perceived, clear and definite, so be the direct-reading demonstration.

It is a straight pipe that the utility model is crossed hydrophone, is difficult for being stopped up by floating thing.Sample tap is opened in a side of crossing hydrophone, and opening direction is consistent with current direction, also is difficult for blocked.

Count display of the present utility model can be installed on the concrete pillar of crossing the hydrophone certain distance or in the management house, so that protection.The circuitry lines casing protection.

Below with reference to accompanying drawing utility model is described in further detail.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is a counter synoptic diagram of the present utility model.

Fig. 3 is the utility model reading display operation circuit figure.

With reference to Fig. 1, one cover garden shape or rectangle cast iron short tube are crossed hydrophone (1), one water blocking ring of interior setting (2), and aperture (3) is opened at the center line horizontal level of crossing hydrophone (1), and the outlet (5) of connection proportional sampling counter (4), middle serial connection regulator (6).When the channel water flowing, water flooding is crossed hydrophone (1).Increase because water blocking ring (2) is located flow velocity, locate to cause low pressure, form pressure reduction, counter (4) is also intake from sample tap (7) simultaneously in proportion at aperture (3).Sampling water stream flows into through water inlet drain grating (20).Know that by Fig. 2 current enter counter (4) through sampling induction pipe (7), rotor is rotated, pass to gear train (9) through axle and slow down through rotor (8).Be transferred to the rotating disk (10) that magnet steel is housed again.When magnet steel forwarded near the magnetic switch (11), magnetic switch was closed circuit, and circuit (12) is connected.Each action counting of display (13.19) once.In order to reach the equal proportion sampling, making scale-up factor is 1/1000, and scalable regulator (6) core position realizes.As shown in Figure 3.When the rotating disk that magnet steel is housed (10) rotated a week, magnet steel was near magnetic switch (11), and circuit is connected.At this moment " ∑+" key (14) of electronic calculator (13) is connected, and display screen shows " 1 ", and electromagnet (15) work in the parallel line will attract to dial pendulum (16) action once simultaneously, makes a counter position runner change a number by transmission shaft.Along with rotating disk (10) number of revolutions increases, electronic calculator (13) and digital runner counter (19) be the coordination counting one by one.General electronic counter display screen (13) is contained in card, so that operation note.Runner counter (19) then can be contained in card or be contained in the shelter, the statistics that adds up and the annual water inventory of crossing for future reference.

Claims (5)

1, a kind of direct-reading channel water meter, form by crossing hydrophone, counter, regulator and reading display, it is characterized in that: cross the aquaporin inwall and the counter of crossing hydrophone and outside sampling counting of water blocking ring and regulator are set with adapter mutually and connect, the interior magnetic switch of counter is connected with outside even numbers word reading display by lead.

2, direct-reading channel water meter according to claim 1, it is characterized in that: cross garden shape and rectangle water-carrying section shape that hydrophone adopts bi-directional symmetrical, cross aquaporin inwall middle part annular water blocking ring together is set, open an apopore that is connected with stopple coupon on the water blocking ring, apopore is positioned on the water-carrying section central horizontal line.

3, direct-reading channel water meter according to claim 1 is characterized in that: counter is moulded the core parts by aluminium shell and rotary wind type and is formed, and magnetic switch is set in casing makes counting element.

4, direct-reading channel water meter according to claim 1 is characterized in that: the sampling regulator is contained in after the counter and is connected with sampling apopore on crossing the hydrophone water blocking ring, and regulator adopts orifice plate and valve mechanism respectively according to range of adjustment.

5, direct-reading channel water meter according to claim 1 is characterized in that: mould the plate face arrangement form and the control circuit that counts synchronously that shell reading display adopts electronic liquid crystal digital screen and runner digital double to show.

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