CN2795817Y

CN2795817Y - Rotary wing switch water meter

Info

Publication number: CN2795817Y
Application number: CN 200420060565
Authority: CN
Inventors: 何芝财
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-08-03
Filing date: 2004-08-03
Publication date: 2006-07-12
Anticipated expiration: 2014-08-03

Abstract

The utility model relates to a rotating-vane-type switch water meter which belongs to the field of the manufacture of water meters. The utility model is mainly composed of a meter housing, an impeller and a counter driven by the impeller. In the meter housing, a vertical fluid flow passage adjacent to a water inlet is provided with a reversal cut-off valve; a nut is connected with the meter housing in a screwing way, and a connecting rod is positioned in an inner cavity of the nut and is connected with the connecting rod in a screwing way; a valve core is movably arranged in an opening at the lower part of the connecting rod, the lower part of the valve core is provided with a sealing ring and the valve core is plugged on the vertical fluid flow passage. The utility model has the advantages that the fluid flow passage in the meter housing can be cut off, and the fluid flow passage can be automatically cut off if the utility model is installed in a reversal direction; moreover, the metering accuracy is high, the sensitivity is high and the service life is long.

Description

Rotary wind type switch water meter

One, technical field

The utility model relates to discharge metering instrument, is that rotor water gauge is made the field specifically.

Two, background technology

Existing rotor water gauge is mainly by watchcase, impeller, gear train (screw drive mechanism and gear drive etc.), compositions such as mechanical counter.Impeller is among a cantilevered axle is arranged on watchcase cavity fluid passage, and water flows into from the watchcase water inlet, promotes the impeller rotation, the worm gearing on impeller shaft, and final actuation counter is rotated counting.It has following shortcoming: 1, water meter itself is provided with self-locking mechanism.As long as water valve one leaves, the water meter counting of then starting working.2, if water meter is oppositely installed (be about to the water meter water delivering orifice and be connected on the water inlet pipe, the water meter water inlet is connected on the rising pipe), still there is water to flow out, and influences the metering of water simultaneously from water meter.3, the water meter measurement low precision, sensitivity is lower and serviceable life is shorter.Because impeller shaft is the cantilever setting, under the waterpower long term, easily misplaces, is shifted, cause the worm gearing resistance to strengthen, the initiating flow of mechanical counter is increased, reduced the sensitivity of counter, and finally cause this part parts excessive wear, shortened serviceable life.

Three, utility model content

The purpose of this utility model is at prior art problems and weak point and a kind of rotary wind type switch water meter is provided, and it has can turn-off the watchcase fluid passage, and the kinetic energy of automatic truncated table shell-side fluid passage when oppositely installing.This novel purpose is achieved in that a kind of rotary wind type switch water meter, comprise watchcase, impeller, counter by impeller-driven is characterized in that, the vertical fluid passage of contiguous water inlet is provided with a reverse shut-off valve in the described watchcase: nut connects with the watchcase spiral, connecting rod is positioned at nut intracavity, also spiral connects with it, spool places the perforate of connecting rod bottom versatilely, and its underpart is provided with O-ring seal, and the spool shutoff is on the shoulder of this vertical fluid passage.

Be equipped with a skim strainer on the vertical fluid passage at described watchcase rear portion, offer the inlet opening on the bottom of the following convex of skim strainer, be equipped with a reverse holly strip on the base flange among the skim strainer inner chamber; Also have its bottom surface and have the impeller box of a plurality of oblique inlet openings, the skim strainer inner chamber is stretched in the impeller box bottom, and described impeller is arranged among the impeller box; Also has the flux modification sheet that is arranged on the impeller box below, bottom impeller box, fits: have on it and a plurality of one to one inlet openings, the oblique inlet opening of impeller box.

By above design as seen, reverse shut-off valve on the fluid passage in the watchcase substantially is a check (non-return) valve, when water water inlet from watchcase flows into (when forward is installed), the acting force that hydraulic pressure produces is applied on O-ring seal and spool bottom surface, hydraulic action is made every effort to overcome clothes spool gravity, and make have O-ring seal spool upwards, leave the original position (promptly be not subjected to hydraulic action power, only under action of gravity and the situation of shutoff on the shoulder of vertical fluid passage), this moment valve opening, water flows through through valve, the impulsion impeller, drive counter, show flow reading.If when oppositely installing, soon the watchcase water delivering orifice is connected on the water inlet pipe and (will shows anti-dress), water oppositely flows into from the watchcase water delivering orifice, hydraulic action power is applied on the end face of the spool of being with O-ring seal, and spool is continued to overlay on the shoulder of vertical (for the axis with watchcase water inlet and water delivering orifice is horizontal direction) fluid passage, and valve still is in the shutoff situation, the watchcase fluid passage is turned off, do not have current through watchcase, it is motionless that impeller keeps, and counter is not worked.

Under forward installation situation on request, need only the turn connecting rod downward if will turn-off the watchcase fluid passage, make on the shoulder of connecting rod with spool roof pressure vertical fluid passage in watchcase to get final product.

During normal the use, water flows into from the watchcase water inlet, behind reverse shut-off valve, filter inlet opening on the skim strainer bottom again, slagging-off, the reverse holly strip of jack-up is again through flow control mechanism (the two between the size of the degree of misalignment of corresponding aperture decision flow area of flow than positive and impeller box composition, thereby the size of decision flow), the impeller of flowing through at last.Because skim strainer, impeller box etc. all are arranged on the vertical fluid passage, thereby impeller shaft is vertical setting.

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

When 1, normally using, can turn-off the watchcase fluid passage, stop using water meter, reach self-locking action;

2, if oppositely install, this novel then automatic truncated table shell-side fluid passage can not use water meter;

3, under certain hydraulic pressure, by flow control mechanism control inflow, use when showing;

4, this novel measuring accuracy is higher, and sensitivity is higher.Compare with the cantilever structure of existing water meter turbine axle, this novel impeller axle is vertically arranged (when water meter is installed, impeller shaft is vertical layout), it is littler that impeller shaft rotates suffered frictional resistance, the initiating flow of wheel rotation has reduced by 2/3 to 3/4, under, the identical prerequisite of flow measure-alike in the impeller profile, this novel impeller velocity of rotation will (measures range that is to say counter wants big hurry up, it is high that measuring accuracy is wanted), in other words, under, the flow same case identical at wheel speed, this novel impeller size is relatively littler.In the reality, it is nearly 1/2 that this novel impeller size is dwindled, and its measuring accuracy still is higher than existing water meter.

Four, description of drawings:

Fig. 1 is this novel general assembly drawing;

Fig. 2 is the assembling synoptic diagram of shown in Figure 1 novel parts;

Fig. 3 Fig. 4 is respectively the front view and the vertical view of impeller box shown in Figure 1;

Fig. 5 is the sectional view along the B-B line shown in Figure 4;

Fig. 6 is the sectional view along the A-A line shown in Figure 3;

Fig. 7 Fig. 8 is respectively the front view and the vertical view of skim strainer shown in Figure 1;

Fig. 9 is the sectional view along the C-C line shown in Figure 7;

Figure 10 is the front view of flow shown in Figure 1 than positive;

Figure 11 is that D shown in Figure 10 is to view.

Five, embodiment

Fig. 1 Fig. 2 illustrates, watchcase 18 lefts have water inlet, right-hand have a water delivering orifice, in the interior whole fluid passage of watchcase, two vertical fluid passage (see figure 2)s are arranged, the vertical fluid passage on the left side (is advanced with respect to watchcase, the axis of water delivering orifice is in water in the position, be provided with reverse shut-off valve down together): nut 3 connects with the watchcase spiral, connecting rod 4 is positioned at nut 3 inner chambers, and connect with spiral, spool 5 activities place connecting rod 4 bottom perforates, O-ring seal 6 is arranged on the spool bottom, the spool shutoff of band O-ring seal is on the shoulder of this vertical fluid passage, leakproof nut 1 is positioned at nut 3 tops, and connect with its endoporus spiral, packing ring 2 is arranged on nut 3 tops, between nut 3 and leakproof nut.Be equipped with skim strainer 17 on the vertical fluid passage on the right, referring to Fig. 7 Fig. 8 Fig. 9, offer inlet opening 17a on the bottom of the following convex of skim strainer, its aperture is 1-3mm, is equipped with a reverse holly strip 16 on the base flange in the skim strainer inner chamber; Referring to Fig. 3-6, that impeller box 14 bottom surfaces have a plurality of (preferably 3) is oblique (being 30 degree with the bottom surface angle preferably) inlet opening 14a, 14b, 14c.Impeller 13 (impeller 13 reduces about half than existing water meter turbine physical dimension) is arranged among the impeller box, the skim strainer inner chamber is stretched in the impeller box bottom, its intermediate flange rides over the skim strainer upper edge, flow is arranged on the impeller box below than positive 15, fit with the impeller box bottom, referring to Figure 10 Figure 11, flow is than having on the positive and a plurality of one to one inlet openings, the oblique inlet opening of impeller box, as 3 inlet opening 15a, 15b, 15c.In addition, counter 11 is installed in the counter box 12, and counter top is provided with glass plate 10, packing ring 9, table and covers 7 and gland 8 etc.

Claims

1, a kind of rotary wind type switch water meter, comprise watchcase, impeller, counter by impeller-driven is characterized in that, the vertical fluid passage of contiguous water inlet is provided with a reverse shut-off valve in the described watchcase (18): nut (3) connects with watchcase (18) spiral, connecting rod (4) is positioned at nut (3) inner chamber, also spiral connects with it, spool (5) places connecting rod (4) bottom perforate versatilely, and its underpart is provided with O-ring seal (6), and spool (5) shutoff is on the shoulder of this vertical fluid passage.

2, switch water meter according to claim 1 is characterized in that, described reverse shut-off valve also comprises: be arranged on nut (3) top packing ring (2) and with the leakproof nut (1) of the interior aperture thread connection of nut (3).

3, switch water meter according to claim 1 and 2, it is characterized in that, be equipped with a skim strainer (17) on the vertical fluid passage at described watchcase (18) rear portion, offer inlet opening (17a) on the bottom of the following convex of skim strainer, be equipped with a reverse holly strip (16) on the base flange among the skim strainer inner chamber; Also have its bottom surface and have the impeller box (14) of a plurality of oblique inlet openings, the skim strainer inner chamber is stretched in the impeller box bottom, and described impeller (13) is arranged among the impeller box (14); Also has the flux modification sheet (15) that is arranged on the impeller box below, bottom impeller box, fits: have on it and a plurality of one to one inlet openings, the oblique inlet opening of impeller box.

4, switch water meter according to claim 3 is characterized in that, the oblique inlet opening of described impeller box (14) is 3; Inlet opening on the described flux modification sheet (15) corresponds to 3.

5, switch water meter according to claim 4 is characterized in that, the oblique inlet opening of described impeller box (14) and the angle of bottom surface are 30 degree.