CN2763779Y - high-sensitivity rotary-wing type open/close water meter - Google Patents

Abstract

The utility model relates to a high-sensitivity rotary-wing type opening/closing water meter which comprises a meter housing, a water filtering screen, an impeller arranged in the impeller case housing, and a counter arranged in a counter case, wherein the impeller is a compound impeller, a plurality of big blades are evenly distributed on an impeller shaft in a radial shape, a plurality of small blades are arranged between every two adjacent big blades and are evenly distributed on circular rings which are fixedly connected with the big blades; the impeller case is also provided with a water inlet hole at the part above a water inlet hole of the impeller case. The utility model is also provided with a valve block seat arranged between the water filtering screen and the impeller case; water inlet holes are evenly distributed on the periphery of the top part of the valve block seat; the periphery of a water inlet hole at the bottom part is provided with a circle of boss; the utility model is also provided with an automatic valve block which is movably arranged on the bottom part of the valve block seat and a moving position limiting mechanism for the automatic valve block. The utility model which has the characteristic of high metering sensitivity solves the problem that water drops, but the counting is not carried out and the problem exists for a lone time in the existing water meter.

Description

High sensitivity rotary wind type switch water meter

One, technical field

The utility model relates to flow-meter, and particularly the mechanical type water meter is made the field.

Two, background technology

Existing rotor water gauge is mainly by watchcase, water strainer, impeller (placing impeller box), mechanical pointer counter compositions such as (placing the counter box).Water enters from the watchcase water inlet during use, (spread all over eyelet on it through water strainer, be used for filter cleaner) after, inlet opening from impeller box (position in this hole is over against blade) enters the box, promote wheel rotation, impeller shaft drives the counting gear system (many to gear drive) of counter by worm gearing or by magnetic driving mechanism, finally drives indicator of water gauge and rotates, and indicates the discharge reading.Existing rotor water gauge long-term existence, a unsolved problem are: the water meter sensitivity is relatively poor.Under tiny flow situation, water is through water strainer, the perforate on impeller box again, enter in the impeller box, until touching blade surface, impeller is produced impetus power, its whole fluid passage is all big (under the normal condition first, according to the full load flow design), the tiny water yield is touching before the blade, and flow velocity reduces a lot, and promptly kinetic energy rejection is bigger, the corresponding reduction of impetus power that impeller is suffered is to such an extent as to flowing through of the tiny water yield can not impeller be rotated and the generation counting.As, find in the use that with the mode water outlet of dripping, and do not produce the flow counting, 8 hours the amount of dripping reaches 40 kilograms nearly.This is to have a headache very much concerning water supplier, thirsts for the thing that solves again.Secondly, existing water meter does not have auto-lock function, and water supplier can't implement indivedual defaulting subscribers are limited the measure of water supply.

Three, utility model content

Task of the present utility model provides a kind of high sensitivity rotary wind type switch water meter, is intended to improve water meter sensitivity.The technical scheme that realizes this novel purpose is: a kind of high sensitivity rotary wind type switch water meter, comprise watchcase, water strainer, place the impeller of impeller box, place the counter of counter box, it is characterized in that, described impeller is compound impeller: a plurality of big blades are distributed on the impeller shaft radially, a plurality of vanelets radially, between the adjacent two big blades, be distributed on and annulus that big blade connects firmly on; Be positioned at top, impeller box inlet opening on the described impeller box and also have an inlet opening, this inlet opening is less than the impeller box inlet opening; Also have the valve block that is arranged between water strainer and the impeller box, be evenly equipped with the inlet opening on the valve block top perimeter, a circle boss is arranged on the inlet opening periphery of bottom; Also have the autovalve piece and the autovalve piece that place versatilely on the boss of valve block bottom and move position-limit mechanism.

Above-mentioned autovalve piece position-limit mechanism is: connect firmly on valve block bottom surface, be distributed on four limiting plates around the boss of bottom surface; Be fixedly connected with "+" font reinforcement in the boss of described valve block.

Above-mentioned vanelets height is half of big blade; Vanelets end face and lateral surface respectively with the flushing of big blade.

Also have switch valve: valve body is screwed on the watchcase, and valve rod is connected with the valve body spiral, and the perforate at O-ring seal on valve rod one end and watchcase intake antrum rear portion is suitable, the valve rod other end be shaped as triangular prism.

The water inlet of above-mentioned watchcase and the dead in line of water delivering orifice and this axis in the vertical direction.

The axis of above-mentioned valve rod in the horizontal direction

According to above technical scheme, under the normal water yield, water from the watchcase water inlet behind water strainer (filtration), the kinetic energy of water makes progress the autovalve piece, and (proportion of autovalve piece is slightly larger than water to jack-up, be not subjected under the external force situation, and the autovalve piece is fastened on the valve block from the valve block, with the bottom inlet opening shutoff of valve block), water enters from inlet opening, valve block bottom, and (the existing setting) enters impeller box, impulsion wheel rotation again through the impeller box inlet opening, the final counting that produces; Under tiny water yield situation, because its kinetic energy is less, can not be with autovalve piece jack-up, water can only (its flow area be littler than inlet opening, automatic valve seat bottom from the inlet opening on the valve block top perimeter, thereby the flow velocity of water is bigger) enter into outside the impeller box, at this moment, because the autovalve piece is in the closed position, in valve block and the impeller box, the bottom that is positioned at its normal inlet opening all is full of has stagnant water in (the no longer water of Liu Donging), water can only enter in the impeller box from an inlet opening on impeller box top, although inflow is little, flow area diminishes, flow velocity is corresponding bigger, and kinetic energy is corresponding bigger; Secondly, the density of blade increases, and the kinetic energy rejection of water is less.If 7 big blades, 14 vanelets, 21 blades altogether, the density of blade on circumference increases, because increase is vanelets, weight increases few, in a single day water enter from the single inlet opening on impeller box top, and the blade of impulsion contact immediately is delivered to impeller with kinetic energy in the least disadvantage mode; If only be existing 7 big blades, water enters impeller box can not touch blade at once, because the change suddenly of its flow area is big, it is more that the kinetic energy of water will lose, and the kinetic energy that is passed to blade is just less, to such an extent as to be difficult to promote the wheel rotation counting.

Compare with existing rotor water gauge, this is novel to have following characteristics and advantage:

1, water meter is highly sensitive.This novel long-standing problem that has water droplet to go out and do not count of existing water meter that solved.

In the existing water meter, the cross section of fluid passage that enters the water of impeller box through filter screen is an invariable value all the time, under the situation of the tiny water yield (water yield is unusually little), the flow velocity of water reduces, (kinetic energy is directly proportional with quality the kinetic energy of water, with square being directly proportional of speed) correspondingly reduce significantly, to such an extent as to can't impeller rotate counting, cause (note) phenomenon of leaking; And in this new water meter, for the normal water yield and the tiny water yield, the sectional area of the fluid passage of water is respectively two that change, different to some extent values.The fluid passage of the normal water yield: impeller box inlet opening, inlet opening, valve block bottom (i.e. the intake tunnel of existing water meter); The fluid passage of tiny flow: the inlet opening at valve block top (circulation area is much smaller than inlet opening, valve block bottom), the inlet opening (circulation area is less than the impeller box inlet opening) on the impeller box.Compare from both actual internal areas, the latter is more littler.Thereby under tiny water yield situation, the flow velocity of water will be hurry up during this was novel; Secondly, has only big blade on the impeller of existing water meter, and there is not vanelets, water arrives the contact of big blade apart from wanting far away after entering impeller box, time from a big blade to another big blade will be grown, thereby it is big that the kinetic energy loss of water is wanted, the effective kinetic energy that acts on the impeller wants littler, thereby causes water meter sensitivity low.And in originally novel, under tiny water yield situation, after water enters impeller box from single inlet opening, the distance that arrives blade is wanted nearly (density of blade is big), time from a blade to next blade will lack, thereby kinetic energy loss is relatively littler, the effective kinetic energy that acts on the impeller is big relatively, thereby water meter is more highly sensitive.

2, this new water meter is provided with switch valve, is convenient to water supplier each user is managed separately.If in the time of need restricting water supply to a certain user, can use specific purpose tool, insert among the valve body, be enclosed within on the triangular prism of valve rod outer end, the turn valve rod is closed the fluid passage of water meter.

3, this novel vertical design (the entery and delivery port axial line vertically is provided with) makes things convenient for dismounting, the maintenance of water meter; Switch valve horizontally disposed (axis of valve rod in the horizontal direction) makes compact overall structure.

4, the water meter inner chamber is convenient cleans slagging-off.If filter screen external sediment solid bits only need valve body is taken off from watchcase, bits can be discharged.And needn't be as existing water meter, whole water meter unloaded from pipeline clean.

Four, description of drawings:

Fig. 1 is the sectional view of this novel embodiment;

Fig. 2 is a shown in Figure 1 novel assembly relation synoptic diagram;

Fig. 3 Fig. 4 is respectively the stereographic map of the different points of view direction of impeller shown in Figure 1;

Fig. 5 is the stereographic map of valve block shown in Figure 1 and autovalve piece;

Fig. 6 is the stereographic map after valve block shown in Figure 5 and autovalve piece dissect half respectively.

Five, embodiment

Fig. 1 Fig. 2 illustrates, and the water inlet of watchcase 12 and the dead in line of water delivering orifice and this axis are at vertical direction.Substantially can be divided into three chambers in the watchcase: intake antrum, middle part chamber, water chamber.The perforate at watchcase intake antrum rear portion is provided with switch valve: valve body 15 is screwed on the watchcase, valve rod 14 is connected (axis of valve rod in the horizontal direction) with the valve body spiral, O-ring seal 13 on valve rod one end is suitable with the perforate at watchcase intake antrum rear portion, the valve rod other end be shaped as triangular prism, so that use specific purpose tool to be enclosed within above the triangular prism, the turn valve rod, open-close on-off valve, the break-make of controlled water flow.In the chamber of watchcase middle part: its top is provided with counter box 6, and counter 5 places in the counter box, and the counter top is provided with glass 4, and the table that is equipped with on glass covers 1, and the two is lined with packing ring 3 (Fig. 2), and copper cover 2 is screwed on the watchcase, and it is fixing to show lid; Spreading all on the water strainer 11 has the inlet opening, and the water strainer top is provided with impeller box 8, and valve block 10 is arranged between water strainer and the impeller box, and water strainer, valve block and impeller box all are fixed on the shoulder of watchcase middle part chamber.Referring to Fig. 3 Fig. 4, compound impeller 7 places impeller box, its structure is: a plurality of big blade 7a (as 7) are distributed on the impeller shaft radially, a plurality of vanelets 7b (as 14) radially, between the adjacent two big blades, be distributed on and annulus 7c that big blade connects firmly on, end face of vanelets (among Fig. 1 and Fig. 3 top) and lateral surface are (among Fig. 3, with the impeller shaft is benchmark, is lateral surface away from the side of impeller shaft) flush with the end face and the lateral surface of big blade respectively.The height of vanelets is half of big blade; Also have an inlet opening 8b (being positioned at the highest water inlet position on the impeller box) above having 6 inlet opening 8a (the existing setting) on the impeller box and being positioned at inlet opening 8a, aperture (diameter) is 1.5mm.Impeller shaft is connected with counter through gear train (as worm gearing or magnetic driving mechanism), drives rolling counters forward.Referring to Fig. 5 Fig. 6, be evenly equipped with inlet opening 10a on valve block 10 top perimeter, a circle boss 10b is arranged on the inlet opening periphery of its bottom, be fixedly connected with "+" font reinforcement in the boss, to increase intensity.Uniformly around the boss in the valve block be fixedly connected with four limiting plate 10c, with the upper and lower position-limiting action of doing autovalve piece 9 that moved, autovalve piece 9 place versatilely on this boss (the autovalve piece move position-limit mechanism also can adopt other multiple mode as, fixing 4-6 root post on the valve block, play position-limiting action equally), this boss is preferably cone boss, and its top width is 0.5mm, and the proportion that the proportion of autovalve piece is slightly larger than water is for well.

During use,, switch valve is opened with the valve rod of instrument rotary switc valve; Under the normal water yield, water is behind water strainer, and with the autovalve piece jack-up that makes progress, water flow to the impeller box outside from the inlet opening of valve block 10 bottoms, and the inlet opening from the impeller box enters impeller box again, and the impulsion blade makes the wheel rotation counting; Under tiny flow situation, water is behind water strainer, can not be with autovalve piece jack-up, can only arrive the impeller box outside from the inlet opening (flow area is littler than its inlet opening, bottom) of valve block top perimeter, through the single inlet opening on impeller box top (among Fig. 1, the highest water inlet position of its position on impeller box), enter impeller box again, the impulsion blade makes the wheel rotation counting.

Claims (7)

1, a kind of high sensitivity rotary wind type switch water meter, comprise watchcase, water strainer, place the impeller of impeller box, place the counter of counter box, it is characterized in that, described impeller is compound impeller (7): a plurality of big blades (7a) are distributed on the impeller shaft radially, a plurality of vanelets (7b) radially, between the adjacent two big blades, be distributed on and annulus (7c) that big blade connects firmly on; Be positioned at top, impeller box inlet opening (8a) on the described impeller box (8) and also have an inlet opening (8b), the aperture of inlet opening (8a) is greater than the aperture of inlet opening (8b); Also have the valve block (10) that is arranged between water strainer (11) and the impeller box (8), be evenly equipped with inlet opening (10a) on the valve block top perimeter, a circle boss (10b) is arranged on the inlet opening periphery of bottom; Also have the autovalve piece (9) and the autovalve piece that place versatilely on the boss of valve block (10) bottom and move position-limit mechanism.

2, switch water meter according to claim 1 is characterized in that, described autovalve piece position-limit mechanism is: connect firmly on valve block (10) bottom surface, be distributed on bottom surface boss (10b) four limiting plates (10c) all around; Be fixedly connected with "+" font reinforcement in the boss of described valve block (10).

3, switch water meter according to claim 1 is characterized in that, described vanelets (7b) highly is half of big blade (7a); Vanelets end face and lateral surface respectively with the flushing of big blade; Described valve block (10) bottom boss is a cone boss, and its top width is 0.5mm.

4, switch water meter according to claim 3 is characterized in that, described big blade (7a) is 7, and vanelets (7b) is 14; The aperture of the inlet opening on the described impeller box (8b) is 1.5mm.

5, according to the described switch water meter of the arbitrary claim of claim 1-4, it is characterized in that, also have switch valve: valve body (15) is screwed on the watchcase (12), valve rod (14) is connected with the valve body spiral, O-ring seal (13) on valve rod one end and the perforate at watchcase intake antrum rear portion are suitable, the valve rod other end be shaped as triangular prism.

6, switch water meter according to claim 5 is characterized in that, the water inlet of described watchcase (12) and the dead in line of water delivering orifice and this axis in the vertical direction.

7, switch water meter according to claim 6 is characterized in that, the axis of described valve rod (14) in the horizontal direction.