KR900006702Y1 - Water meter - Google Patents

Abstract

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Description

Flow meter

1 is a longitudinal sectional view of an integration counter accommodating part of a conventional flow meter.

FIG. 2 is a cross sectional view showing an integration counter receiving portion of the flow rate in FIG.

Figure 3 is a longitudinal sectional view of the flow meter according to an embodiment of the present invention tightened to the water pipe.

4 is a cross-sectional view of the counter of the flow meter of FIG.

5 is an exploded perspective view of a portion of the flow meter of FIG.

6 is a plan view of the countercase assembly of the flow meter of FIG.

7 is a sectional view taken along line 7-7 of FIG.

8 is a bottom view of the countercase assembly of FIG.

9 is a front view of the flow unit plate of the flow meter of FIG.

FIG. 10 is a cross-sectional view taken along line 10X10 of FIG.

FIG. 11 is a cross-sectional view taken along line 11-11 of FIG.

12 and 13 are graphs showing the measurement ranges of the flowmeter of the present invention and the conventional flowmeter in large and small diameter water pipes, respectively.

＊ Explanation of symbols on main parts of drawing

1: Ikcha housing 2: Ikcha

3: tooth gear 4: reduction mechanism

5: Instruction case 7: Counter assembly

9: Instruction 10: Counter Case

12: counter assembly 14: O-ring

15: glass plate 16: pressing ring

17: fastening ring 20: groove

21: protrusion 22: receiving portion

25: flow unit plate 26: leg portion

27: water wheel 28: drive gear

29, 34: support shaft 30: worm gear

31: support portion 33: guide rail

35: display window 40: worm

50: flow meter 51: counter housing

The present invention relates generally to a flow meter, and more particularly to a cartridge type liquid flow meter for measuring the flow rate of the fluid flowing through the inside of a sealed tube such as a water pipe.

Background Art Conventionally, there have been various types of flowmeters for measuring the flow rate of fluid flowing in a closed distribution pipe. As a typical typical flow meter, a vane suitable for rotating by a fluid circulating in the vane housing is accommodated in a vane housing connected in series to a sealed distribution pipe such as a water pipe, and the dynamic pressure of the fluid flowing in the vane housing is adjusted. It was a form of specifying the flow amount from the rotation speed of the blade wheel rotated using.

This type of flowmeter is an integrated counter connected to the final deceleration stage by rotating the rotor car in several stages.For example, the flow rate is displayed in a predetermined unit of m ² , and the deceleration rotation speed is proportional to the flow velocity of the fluid. Small flow rates less than a certain unit from are displayed in analog.

This type of flowmeter also includes a dry flowmeter in which the flow indicator disposed above the deceleration mechanism is separated from the fluid, and a so-called wet flowmeter in which the totalizer is contained in the fluid and the fluid is refluxed.

In the dry flow meter, moisture contained in the residual air in the flow rate indicating part becomes water vapor due to a temperature difference between inside and outside, and is easily condensed and flows on the front glass window. Foreign matters such as this easily penetrate, and it is easy to disturb the reading of the scale indicating the flow rate.

The wet flowmeter, in which the fluid flows back to the flowmeter, has the residues such as sand grains and rust contained in the fluid attached to the inner surface of the integration counter or the reading front windshield, in particular, the portion having a low flow rate, and the bubbles contained in the fluid are at the top of the flowmeter. The inner surface of the glass window becomes cloudy and difficult to read because water vapor in the bubble condenses due to a temperature difference between inside and outside.

In order to alleviate this drawback of the prior art, a liquid-type flow meter in which a transparent liquid is enclosed between an integration counter case accommodating an integration counter case displaying a flow rate of a predetermined unit and a counter plate thereon has been developed.

As shown in FIGS. 1 and 2, the liquid-sealed flowmeter accommodates the integration counter (a) in the integration counter case (c) with an open top, and stores the integration counter case (c) with a transparent counter plate (b). ), The counter plate (b) and the integrated counter case (c) are integrally formed by welding or the like.

The transparent liquid is enclosed in a space enclosed by a counter plate (b) and an integrated counter case (c).

Since the counter plate b is transparent, the flowmeter can easily read the instructions indicating a small flow rate of less than a predetermined unit directly connected to the reduction mechanism.

In addition, the transparent liquid is enclosed between the counter plate (b) and the cumulative counter case (c), so that the indication value of the cumulative counter becomes clear, so that it is easy to read. do.

However, the liquid-bar flow meter according to the prior art has a shaft (d) penetrating the cumulative counter accommodating portion of the cumulative counter case, and a drive gear for driving a water wheel is mounted on an outer portion of the through shaft (d).

The through shaft (d) has a liquid sealing structure in which the liquid sealing structure is sealed between the integration counter case (c) by an O-ring (e). However, when the liquid sealing structure is firm, the resistance between the O-ring and the through shaft is reduced. When the accuracy of the flowmeter decreases, and the flowmeter is regenerated to some extent and the precision of the flowmeter is increased, it is difficult to read the indicator by mixing the transparent liquid with the fluid in the tube and mixing of bubbles due to the pressure fluctuation of the fluid in the sealed tube. Become.

In fact, even in the case of a rigid liquid sealing structure, the transparent liquid enclosed in the portion where the pressure difference occurs in the integrated counter in the integrated counter case (c) leaks and cannot be made a complete liquid-tight structure. It is necessary to prevent the leakage of the transparent liquid by attaching the bag (f) to balance the pressure inside and outside the integration counter case (c).

This liquid-bar flow meter cannot specify the exact flow rate when the through shaft d held by the O-ring has a low fluid flow rate due to the rotational resistance of the O-ring and the rotational torque given to the van, and the O-ring and rubber bag ( The initial purpose cannot be expected due to the deterioration of the material due to the change of time f) and the wear of the bearing portion caused by these effects.

And the integration counter case (c) needs to be assembled to mount the through shaft (d). When the integration counter (a) is fitted in the integration counter case (c), the through gear (d) is attached to the integration counter case (c) after the drive gear is installed, and then the shaft on which the water wheel is mounted is inserted into the recess of the counter case. It is necessary to drop it in contact with the driving gear and integrate it with the counter plate by welding or the like.

Because of this, the assembly of the integration counter requires skill, and it takes a lot of time and increases the manufacturing cost.

The present invention aims to improve the above-described conventional liquid flow meter.

The object of the present invention is to provide a liquid flow meter having a counter case of a transparent body in which the totalizer counter is completely separated from the flow fluid.

In addition, an object of the present invention is to provide a liquid-type flow meter capable of measuring the fluid flow rate very accurately even when the fluid flow rate in a closed pipe such as a water pipe is small.

It is also an object of the present invention to provide a liquid-type flow meter that can be assembled very quickly and in a short time without requiring skill even when fitting an integration counter into a counter case.

It is also an object of the present invention to provide a liquid-type flow meter which can read the measurement values clearly over a long time and can be attached very simply.

According to a main feature of the present invention, a vane housing installed in series in a hermetically sealed tube, a vane adapted to be rotated by a fluid contained in the vane housing and circulating in the housing, coupled to the vane, and the rotational speed of the vane A deceleration mechanism that decelerates in multiple deceleration stages, directing means for displaying a small flow rate less than a predetermined unit connected directly to the deceleration mechanism, and an integrating counter assembly for counting the accumulated flow rate of the flow fluid in the vane housing overlying the indicating means. It is provided with a counter case of the transparent body is accommodated, the flow meter is provided in which the integration counter assembly and the reduction mechanism is coupled by a magnetic coupling means.

According to another feature of the present invention, the integrated counter assembly includes a support shaft on which a water wheel (multiple) is mounted and a support shaft on which a drive gear (large) of driving the water wheel is mounted on a flow rate unit plate. It consists of.

According to another feature of the present invention, the magnetic coupling means for coupling the integration counter assembly and the reduction mechanism is formed of a plastic gear wheel.

The above and other objects of the present invention will become apparent from the following description with reference to the accompanying drawings in conjunction with the features of the present invention.

An embodiment of the flow meter according to the present invention is shown in FIGS. 3 to 11.

As shown in FIG. 3, the flow meter 50 includes a vane housing 1 in a meter case installed in series in the middle of a water pipe and a counter housing 51 disposed on the vane housing. 1) A vane 2 suitable for rotating at a dynamic pressure of tap water through which the vane housing is circulated is housed, and an instruction case 5 in which the speed reduction mechanism 4 is fitted into the counter housing 51 is housed.

The rotating shaft 2a of the vane 2 is struck inside the counter housing 51 via the rotating shaft insertion bearing 51a of the counter housing 51.

When tap water flows in from the inlet 1a in the vane housing 1, the inflowed water rotates the vane 2 around the rotating shaft 2a and then flows out to the outlet 1b for use in a predetermined purpose. do.

The rotation of the vane 2 is transmitted to the reduction mechanism 4 having a plurality of deceleration steps via the gear 3 provided at the tip of the rotation shaft 2a.

The reduction mechanism 4 is formed of a reduction gear assembly that fits into the instruction case 5 formed in a cylindrical shape.

An appropriate opening portion 5a is formed on the side of the instruction case 5 so that tap water can enter and exit through the opening portion 5a. In addition, the lower surface of the instruction case 5 is provided with a hole 5b through which the rotary shaft 2a of the blade wheel 2 is inserted, and this hole 5b has an insertion hole of the rotary shaft 2a below the counter housing 51. It fits snugly at 51b.

As shown in FIG. 5, an upper portion of the instruction case accommodates the jaw portion 23 fitted to the rear axle, that is, the lower surface of the counter case assembly 7 to be described later, and a receiving portion for receiving the counter assembly 12 of the counter case assembly. An opening portion into which the 22 is fitted is formed, and an indicator plate 6 displaying a small flow rate of less than a predetermined unit of tap water is provided on the abnormal surface.

Shown and the embodiment, the grid (8) to display a flow rate less than 1m ³ as the predetermined unit in this example the instruction plate (6) 0.01m 0.01m ³ and ³ units are provided, each scale (8 The small flow rate is indicated by each of the instructions 9 coupled to the deceleration stage of the speed corresponding to the flow rate unit.

Each of these instructions 9 is fixed to the top of the instruction case 5 and the tip of the rotating shaft passing through the indicator plate 6 from the reduction mechanism 4 in the instruction case 5 at a speed that is inferior to the flow rate of tap water. Rotate

And the counter base assembly 7 is attached on the instruction case 5 by a suitable fixing means such as a screw, and the counter case assembly 7 has a counter as clearly shown in FIGS. A case 10, a counter assembly 12, an O-ring 14, a glass plate 15, a metal push ring 16 having a Z-shaped cross section, and a fastening ring 17 having a screw formed in the inner circumference thereof.

The counter case 10 is a transparent resin formed of a rigid integral structure capable of withstanding the water pressure of the water pipe, and the back side of the counter case 10 as shown in FIG. And a jaw portion 19 for positioning, which fits into the space 18 for freely rotating 9 and the jaw portion 23 of the instruction case 5.

In addition, the counter case 10 is provided with a groove 20 in which the O-ring 14 is disposed on the front surface, that is, the upper surface thereof, and a fastening ring 17 on the outer circumferential surface of the cylindrical protrusion 21 around the groove 20. A screw for screwing the screw is formed.

As shown in FIG. 5, the accommodating part 22 accommodating this counter assembly 12 is open to the front of this counter case 10, and each of the openings 32 of this accommodating part 22 is open. A guide rail 33 is formed along the edge.

The counter assembly 12 is accommodated via the guide rail 33 of the opening 32. In addition, as shown in FIG. 4, on the outer side surface of the accommodating portion 22, there is a support portion 31 which supports the worm gear 30 of the magnetic coupling means for driving the integration counter to rotate freely. The worm gear 30 is formed of a worm gear 30 made of a plastic magnet engaged with the worm 40 interlocked in the final deceleration step of the reduction mechanism 4.

Accordingly, the receiving part 22 receives the driven side member of the magnetic coupling means of the counter assembly 12 corresponding to the receiving part 31 side, and mounts the O-ring 14 in the groove 20. When the glass plate 15 and the pressing ring 16 are sequentially installed on the front of the case 10 and the fastening ring is screwed to the screw portion of the outer circumferential surface of the protrusion 21, the inside of the counter case assembly 7 is completely sealed. It can be made into a structure.

The counter case assembly 7 is filled with an antifreeze liquid, preferably a transparent liquid that is harmless to the human body, from an injection hole 24 of a suitable form as shown in FIG. For this reason, foreign matter such as rust such as air or water pipes cannot be mixed in the counter case assembly 7 so that no blur occurs on the glass plate 15, and a small flow rate is displayed when it is installed and fixed on the instruction case 5. The position of the instructions 9 can also be read.

Next, the integration counter assembly 12 will be described.

As shown in FIG. 5, the counter assembly 12 includes a plurality of water wheels 27 mounted on the flow unit plate 25 and the leg portions 26 extending rearward from both sides of the flow unit plate. It is formed of one cartridge having a plurality of driving gears 28 for driving the water wheels 27, and the flow rate unit plate 25 is shown in FIGS. 9 to 11, and the water wheel 27 and the driving gear ( 28 is shown in FIG.

9 to 11, a plurality of display windows 35 are displayed on the front surface of the flow unit plate 25 for displaying the indicator water of each water wheel 27, and the flow unit plate ( The leg portion 26 extends in a slender shape from the front side both sides of the back to 25).

The leg portion 26 is guided along the guide frame 33 in the accommodating portion 22. When the leg portion 26 is accommodated in the opening portion 32 of the accommodating portion 22, the leg portion 26 is fitted into the opening portion 32. Moreover, the support shaft 29 which mounted the water wheel 27 freely and the support shaft 34 which mounts the drive gear 28 freely are hypothesized by the both leg part 26. As shown in FIG.

As shown in Figs. 4 and 5, the support shaft 34 includes a drive gear that is integrally formed with teeth that engage with the water wheel 27a at the extreme end of the support shaft 29, that is, made of plastic magnets. The pinion tooth 28a is freely mounted, and the pinion tooth 28a forms the driven side member of the magnetic coupling means.

When the pinion gear 28a is rotated in communication with the rotation of the worm gear 30, the water wheel 27a at the extreme end is first communicated with each other and the water wheel 27a is rotated once. The water wheel 27b is rotated through the pinion gear 28b, and the water wheel 27c of the upper seat is higher than this every time the water wheel 27b of the lower seat sequentially rotates once. Pinion gear 28c; It is rotated through.

Each of these water wheels 27 integrates the rotation speed of the vane 2 through the reduction mechanism 4 provided in the instruction case 5. In the flow meter of this embodiment, five water wheels are provided, but the number of water wheels can be any number such as three, four, or six, if necessary.

In addition, this water wheel is a two-colored hole formed by forming a hole of 0 to 9 in the periphery of the wheel of black resin, and inserting the water of 0 to 9 which protruded into the outer periphery of the wheel of white resin. Because of the molding water difference, it can be read clearly.

The counter assembly 12 has a support shaft 34 of the drive gear 28 installed on the leg 26 of the flow unit plate 25 so that the support shaft 34 does not penetrate the counter case 10. Therefore, as in the conventional liquid flow meter, there is no need to install a liquid sealing mechanism such as an O-ring in the penetrating portion, and it is necessary to fix the driving gear 28, that is, the pinion tooth 28a at the extreme end to the support shaft 34. Since the driving torque of the total counter is very small, even when the flow rate is small, accurate measurement is possible.

When the flowmeter is attached to the counter housing 51 on the upper part of the housing housing 1, as shown in FIGS. 3 to 5, first, the worm gear 30 and the worm 40 of the reduction mechanism 4 are first mounted. Engage Then, the counter case assembly 7 is installed in the instruction case 5 by means of fastening means such as screws, and the gear 3 and the speed reduction mechanism 4 of the vane 2 are mounted from the upper opening of the counter housing 51. Insert into place.

Then, the upper case 37 having the lid 36 hinged is attached to the outer circumference of the upper opening of the mirror case by a suitable means such as screwing to complete the assembly.

Therefore, since the counter body 12 can be assembled in one cartridge as a subassembly before mounting in the receiving portion 22 in the counter case 10, the flowmeter 50 can be simply assembled. However, the counter assembly 12 is easy to replace and does not require skill as in the case of conventional drop assembly.

The operation of the flow meter configured as described above is as follows.

When the vane 2 is rotated by the dynamic pressure of tap water flowing in the vane housing 1, this rotation is transmitted from the gear 3 to the deceleration mechanism 4, and the intermediate deceleration step of the deceleration mechanism 4 is performed. The small amount of circulation is indicated by (9) and (9).

The rotation transmitted from the axial force worm 40 of the final deceleration mechanism 4 to the worm gear 30 of the magnetic coupling means is arranged at the boundary of the side of the receiving portion 22 of the counter case 10. It is transmitted to the pinion tooth 28a, which is the driven side member of the magnetic coupling means, and accumulated in the integration counter assembly 12.

Since the flowmeter has an axis penetrating the counter case, it can be rotated at a very small torque compared to the conventional one. As a result of the experiments of the present inventors, as shown in FIG. Compared with the conventional flowmeter indicated by the code B, a small flow rate of 0.07 m ³ / hour, which has not been measured conventionally, can also be measured.

In the small diameter tube having a diameter of 20 mm, as shown in FIG. 13, it was possible to measure up to a small flow rate of 0.01 m ³ / hour. In addition, since the rubber bag and the O-ring shown in FIG. 2 are not required as in the prior art, the measurement value can be clearly read over a long time and can be installed very simply.

Claims (3)

The rotor 2 through which the fluid flowing in the rotor housing 1 rotates, the deceleration mechanism 4 which decelerates the rotation of the rotor vehicle, and the deceleration mechanism 4 are provided to the magnetic couplings 28a and 30. An integrated counter assembly 12 which is driven and has a plurality of water wheels 27, and the integrated counter assembly 12 is completely enclosed and accommodated, and the integrated counter assembly 12 is a fluid flowing in the housing housing 1. In a flow meter having a counter case 10 separated from the flow meter, the integration counter assembly 12 includes a flow unit plate 25 completely enclosed in the counter case 10 and a leg of the flow unit plate. A plurality of water wheels 27 mounted to the unit 26 via the support shaft 29 and a plurality of drive gears 28 for driving the water wheels 27 are formed in one cartridge shape. There is a flow meter. 2. The magnetic coupling (28a) 30 according to claim 1, wherein the magnetic coupling (28a) 30 is disposed close to one of the worm gear (30) and the leg portion (26) driven by the final deceleration means of the reduction mechanism (4). And a pinion tooth (28a), wherein each tooth (30) (28a) is integrally formed of a plastic magnet. The counter case (10) of claim 2, wherein the counter case (10) accommodates the integration counter assembly, and is formed in the open portion (32) which is sealed by the glass plate (15), and is formed in the opening portion of the counter counter assembly (12). A flowmeter having a guide rail (33) for guiding (26).