WO2019098408A1 - Water meter to which flow path guidance and three-axis hall sensor are applied - Google Patents

Abstract

The present invention relates to a water meter to which flow path guidance and a three-axis hall sensor are applied. Particularly, the present invention relates to a water meter comprising a housing (10), a reading member (20) and a casing (30), wherein an entrance-mounted member (100) is mounted into an opening (32) of an entrance part (31) of the casing (30) for the purpose of flow path guidance, and an eccentric quarter (31a) is formed at an end portion of the entrance part (31) that leads to the inside of the casing (30), such that the flow rate of water flowing into the casing (30) is always constant, and the measurement of a hole is designed such that the rotation speed of an impeller mounted in the housing (10) is constant even if the flow velocity of the water flowing in changes, such that the accuracy of flow rate measurement can be enhanced. Further, the present invention relates to a water meter which detects, through a three-axis hall sensor, the movement of the impeller that changes according to the level of flow velocity or flow rate to be metered, and performs metering by making a correction corresponding to the level of change in the movement of the impeller, thereby enabling more precise water metering, and providing enhanced accuracy of flow rate measurement.

Description

Water meter with flow guide and 3-axis Hall sensor

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a water meter to which a flow path guide and a three-axis hall sensor are applied.

The present invention is characterized in that the flow of the impeller which is varied according to the flow rate or flow velocity of the object to be metered is detected through the triaxial Hall sensor and the impeller is calibrated by the flow change to measure the flow rate, And a meter capable of improving the accuracy of flow measurement.

It is a meter that measures the fluid flow.

However, since the meter has a principle of measuring the flow rate by friction between the wing car and the fluid, when the flow rate of the fluid is less than a certain threshold value, the wing car may not rotate and the flow rate may not be quantified.

For the reasons mentioned above, the amount of water that is discarded without being inspected reaches about 10% of the normal inspection quantity in Korea. Water that is discarded as such is not a waste of water resources, but also leads to massive loss of tax revenue.

Accordingly, the present applicant proposes a new structure of the casing and the housing in order to reduce the error range with respect to the total amount of water used in the water meter for the same amount of water irrespective of the flow rate and flow rate of the water.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a three-axis hall sensor for detecting a flow of an impeller which varies depending on a flow rate or a velocity of an object to be metered through a triaxial Hall sensor, The present invention relates to a water meter having an effect that accuracy of flow measurement can be improved.

In order to accomplish the above object, the present invention provides a water meter including a flow path guide and a three-axis hole sensor, the water meter comprising: a casing of a water meter; A housing (10) inserted into the casing (30) together with an impeller; A meter reading means (20) inserted into the housing (10) and measuring tap water introduced into the casing (30); An impeller 60 rotatably coupled to the inside of the housing 10; And a permanent magnet (M) coupled to an upper end of the impeller (60), wherein:

The water meter detects the flow of the impeller (60) due to the deterioration of the flow rate, and when the impeller (60) is sensed to flow, the water meter measures and corrects the number of rotations of the impeller (60).

According to the water meter and the tap water meter to which the three-axis hall sensor according to the present invention is applied, the flow of the impeller, which is changed according to the flow rate or the velocity of the flow to be metered, is sensed through the triaxial Hall sensor, By correcting and weighing, more accurate metering can be achieved.

1 is a photograph (prior art) showing a casing, a meter reading member, and a housing for a meter reading member;

2 is a photograph (conventional technology) of a typical entrance portion of the casing taken;

Fig. 3 is a side sectional view of the water surface area variable member of the present invention

Fig. 4 is a view showing a state in which the water surface area variable member is mounted as shown in Fig. 3,

5 is a perspective view of the inlet mounting member 100. Fig.

6 is a perspective view of an inlet mounting member and a flow area varying member,

FIG. 7 is a perspective view of the members of FIG. 6,

8 is a view for explaining fastening means for engaging an inlet mounting member and a flow area varying member;

Fig. 9 is a cross-sectional view of Fig.

Fig. 10 is a view showing the lower part of the inlet mounting member as being cut for convenience; Fig. 10

Fig. 11 is a state diagram before mounting the inlet mounting member as shown in Fig. 3

12 is a perspective view of a water surface area variable member

13 is a perspective view of the housing,

14 is a sectional view of the lower housing viewed from the lower direction

15 is a cross-sectional view of a water meter for performing a flow meter correction according to another embodiment

16 is a perspective view of an impeller used in a water meter according to another embodiment;

17 is a cross-sectional view of an impeller used in a water meter according to another embodiment.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a water meter to which a flow path guide and a three-axis hall sensor are applied.

More specifically, the present invention will be described with reference to the accompanying drawings.

The casing (30) is a metallic outer wall of a general water meter, which is an inlet mounting member (100) formed in the shape of a pipe to be mounted in the hole (32) at the inlet (31) side of the casing (30); A flowable area variable member (200) mounted on the inside of the inlet mounting member (100) and having a cross section gradually increasing from one end to the other end; Wherein the shape of the bottom surface portion 250 of the water surface area changeable member 200 is formed as a part of a circle cut out in a fan shape so that the drawn water is deflected leftward or rightward with respect to the drawing direction.

The shape of the bottom surface portion 250 of the flowable area variable member is formed in a shape of a part of a circle cut out in a fan shape, The protrusion-type fastening means 260 and 261 are respectively formed on the body of the water surface area changeable member 200 and corresponding to the receiving member 100 in the form of a groove for receiving the fastening means 260 and 261, (110, 142) are formed.

A plurality of holes are formed in the side portion 120 of the inlet mounting member, and a plurality of holes are formed in the lower portion 140 of the inlet mounting member so as to filter foreign substances in tap water.

Fig. 1 is a photograph showing a casing, a meter reading member and a housing for a meter reading member, Fig. 2 is a photograph of a typical entrance portion of the casing, Fig. 3 is a side sectional view with the water surface area variable member of the present invention mounted, FIG. 5 is a perspective view of the inlet mounting member 100, and FIG. 6 is a perspective view of the inlet mounting member and the flow area varying member in a state in which they are viewed from the same direction as FIG. Fig. 7 is a perspective view showing the members of Fig. 6, Fig. 8 is a view for explaining fastening means for joining the inlet mounting member and the flow area varying member, Fig. 9 is a view from a different angle, FIG. 11 is a view showing a state before the inlet mounting member is mounted as shown in FIG. 3, and FIG. 12 is a view showing a state before the inlet mounting member is mounted, Strabismus A.

Figures 1 and 2 illustrate a conventional water metering device.

Referring to FIG. 1, there is shown a conventional water meter. The water meter is provided with a casing 30 including the water content meter 20 therein. The meter probe 20 The housing 10 is received in the casing and various gear structures (mechanical type) are mounted on the far right side to check the flow rate of the tap water. When a magnet is attached to the impeller, a magnetic force is applied A meter reading member 20 equipped with a structure (electronic type) for electronically measuring a flow rate is shown.

The impeller is connected to the gear structure of the meter reading member 20 to measure the flow rate of the tap water or the impeller (not shown) The magnetic force is applied to the meter 20 to measure the flow rate of the tap water.

After the tap water has passed through the hole 32, it passes through the second hole 15 of the housing. Such a second hole is slightly eccentric to one side as in the directions of F1 and F2, As shown in Fig.

2, the shape of the hole at the inlet is not formed so that tap water can rotate in one direction, but the shape of the hole at the inlet is not formed so that the tap water can rotate in one direction, And the left and right are symmetrically formed like a circular or elliptical shape.

Due to this configuration, the tap water passing through the inlet portion can not pass naturally through the second hole 15 of the housing when colliding with the housing 10 of Fig. 1, and this has the problem of hindering precise measurement of water usage I could not.

That is, in order to induce the tap water to rotate naturally, there is a large error in measuring the amount of water used as the shape of the hole 32 in the inlet portion as shown in FIG. 2. In the present invention, in the hole 32 of the inlet portion, In the direction of F1 and F2 of the housing 10, so as to be able to rotate the inner rotor blades.

In order to achieve this object, the water surface area variable member 200 is mounted so that water passing through the inside of the inlet portion 31 is naturally drawn into the second hole 15 of the housing.

Since the variable area member 200 (FIG. 6) may be difficult to attach to the inlet portion 31, the variable area member 200 is fastened to the inlet fitting member 100 shown in FIG. 6, And then inserted into the inside of the inlet portion 31, as shown in FIG.

FIG. 3 shows a state in which the flow area varying member 200 and the inlet mounting member 100 are mounted on the inlet 31 in the above-described manner.

FIG. 5 is a view showing the water surface area variable member 200 and the inlet mounting member 100 in different directions in a combined state. 12 shows a perspective view of the water surface area changeable member 200. The thickness of the water surface area variable member 200 is relatively thin as t, and its thickness gradually increases (the shape can be grasped in FIG. 6).

The portion of the thickness t corresponds to the hole portion shown in Fig. 7, that is, the corresponding portion mounted on one inlet portion of the inlet mounting member 100, and the opposite portion thereof is located near the lower portion 140 of the inlet mounting member 100 , Thus inducing the tap to pass through only the area of the sector.

When the tap water is deflected to one side as shown in FIG. 5, the water passes naturally through the second hole 15 of the housing 10 shown in FIG. 1, so that even when a small amount of tap water flows, The rotational force or the magnetic force is effectively transmitted to the gear structure or the electronic metering structure of the engine. That is, the rotation of the impeller 60 is facilitated.

When tap water passes through the hole 32 of the inlet portion 31 of Fig. 2 according to the prior art, when the large amount of tap water flows into the casing 30, the tap water strongly hits the outer side portion of the housing 10 , The pump power is lost due to a large pressure loss, and the flow measurement accuracy of the meter reading member 20 is also adversely affected as described above. Therefore, the water surface area variable member 200 and the water surface area variable member 200, As a result, the direction of the tap water is guided to one side (in the case of FIG. 4, the tap is guided to the right side), thereby improving the accuracy of the flow meter inspection.

4 is a schematic view of the inlet portion seen from the front of the inlet portion. As tap water enters the relatively large area of the hole 32, due to the shape characteristic of the water surface area changeable member 200, The direction of the water is induced to pass through the quarter eccentric 50 of 1/4 of the size of the water.

The variable flow area member 200 will be described in more detail.

Referring to FIG. 6, the thickness of one side is relatively thin and gradually increases toward the other side. In addition, the inner surface 220 is a portion directly contacting the main stream of the incoming water, which is processed to a curved surface to minimize the pressure loss of the water.

And is formed to be similar to the surface of the cylinder of the outer side surface 210 opposite to the inner side surface 220 to correspond to the size and shape of the inner surface of the inlet mounting member 100.

Preferably, the shape of the bottom surface portion 250 of the flow area varying member is formed as a part of a circle cut out in a fan shape.

As shown in FIG. 8, protrusion-type fastening means 260 and 261 are formed on the body of the water surface area variable member 200, respectively, as shown in FIG. 8 And accommodating portions 110 and 142 are formed in the body of the inlet mounting member 100 in the form of a groove for accommodating the fastening means 260 and 261 corresponding thereto. The coupling means and the groove of the receiving portion can be coupled to each other to couple the connecting portion with the variable area member and the inlet fitting member. However, there are various joining methods at the ordinary skill in the art. FIG. 9 is a view taken in a direction different from FIG. 8. FIG.

10 is a view showing a lower portion 140 of the inlet mounting member for convenience of illustration and showing a receiving portion for receiving the fastening means.

S in Fig. 11 shows a space in which the inlet mounting member and the flow area varying member are mounted.

On the other hand, although the side of the inlet mounting member is shown as being formed with a hole, there may be no hole in this portion, and a fine hole is formed in the side portion 120 so that the inlet mounting member can act as a filter, Needless to say, fine holes (not shown) may also be formed in the lower portion 140 of the member. In order to act as such a filter, it is necessary to periodically replace the inlet mounting member periodically.

In the present invention, a flow area variable member for guiding the amount of water flow to be eccentric in one direction is provided at the inlet of the water meter, thereby inducing the flow channel of the meter to be effectively turned in one direction to improve the measurement accuracy of the flow rate, It is advantageous to contribute to prevention of frost wave in the winter meter by using a material having a low coefficient of thermal conductivity and a variable area member.

On the other hand, with respect to the flow rate of the incoming water, the inlet fitting member 100 and the flowable area varying member 200 are mounted on the inlet 31 of the casing 30 and at the same time, A predetermined error range is generated because the number of revolutions of the impeller varies due to the flow rate depending on the amount and intensity of water used.

In order to overcome this problem, the present invention proposes a modified housing 10 as follows.

Prior to the description, the impeller slightly cuts off the lower portion of the blade portion of the impeller,

&Quot; as shown in FIG.

FIG. 13 is a view showing a housing of a water meter to which a flow path guide and a three-axis hall sensor according to the present invention are applied, FIG. 14 is a view showing a housing of a water meter, .

First, the housing 10 mainly includes an upper housing 11 and a lower housing 13.

At this time, the upper housing 11 receives the above-described meter reading member 20, and the upper side is configured to cover the cover.

The upper housing 11 includes a first upper housing 11a and a second upper housing 11b having a smaller diameter than the first upper housing 11a and extending in the lower direction. A step is formed along the inner diameter of the inner surface of the housing 11a so that the O-ring can be seated.

The lower housing 13 can be coupled to the lower side of the second upper housing 11b of the upper housing 11. [

The lower housing 13 includes a first lower housing 13a directly connected to a lower side of the second upper housing 11b and a second lower housing 13b having a smaller diameter than the first lower housing 13a, And a housing 15a.

In the first lower housing 13a, a plurality of first holes 13aa are arranged at regular intervals, and the first holes 13aa are formed to have an angle so as to have predetermined directionality.

In addition, the first lower housing 13a may be further extended to extend vertically from a lower side to a predetermined height and vertically extend from a vertically extended side to an inner side by a predetermined angle .

That is, the diameter of the first lower housing 13a decreases toward the upper direction. At this time, the first hole 13aa may be formed in an inclined region of the first lower housing 13a.

In other words, the first hole 13aa is not formed in the vertically extending first lower housing 13a, but is spaced apart from the second hole 15 formed in the second lower housing 15a, which will be described later, Thereby allowing water to flow into the lower housing 13 at a uniform speed when the water flows in and is discharged. Specifically, the following experimental examples will be referred to.

The second lower housing 15a is formed with a second hole 15 as described above and the second hole 15 is also formed to have a predetermined angle and is formed along the outer circumference of the second lower housing 15a A plurality is arranged at regular intervals.

The second hole 15 may have the same height as that of the second lower housing 15a, but may have a height smaller than the height of the second lower housing 15a.

At this time, the first holes 13aa and the second holes 15 are all formed to open in any direction other than the direction in which water is introduced.

In other words, in the case of the first hole 13aa, the uppermost surface direction of the first lower housing 13a is formed to be open, and the second hole 15 is formed such that the lowermost direction of the second lower housing 15a is opened do.

However, in the case of the first hole 13aa, the open area may be partially blocked by being coupled with the upper housing 11. In the case of the second hole 15, when the housing contacts the inner surface of the casing 30, Some areas may be clogged,

This contributes to the uniform movement of water because it creates a space into which water with a delayed inflow can be introduced unlike the structure of a conventional housing without an open area from the beginning.

Further, the first hole 13aa and the second hole 15 have mutually opposite directions, thereby facilitating the inflow and outflow of water.

Particularly, the second holes 15 are angled so as to have the same direction as the direction of rotation of the impeller installed in the lower housing 13, and the first holes 13aa are formed in the lower housing 13, And can be formed in the opposite direction to the second hole 15 described above.

Meanwhile, the second hole 15 is formed by a total of 12 holes due to the above-mentioned ratio and structure. In this case, only six holes can be used by blocking six holes with epoxy. This is advantageous to reduce the rotational error range of the impeller as compared to the twelfth embodiment, as described in the experimental example below.

On the other hand, the rubber packing is formed in the form of an O-ring and can be fitted on the outer surface of each of the upper housing 10 and the lower housing 13 one by one.

Specifically, the first upper housing 11 and the second upper housing 12 are separated from each other, and the first lower housing 13a and the second lower housing 15a are separated from each other, When the housing according to the present invention is fixed to the metal pipe for the water meter, the inflowing tap water can not flow into the second hole 15 and is stagnant and flows upward into the outside of the housing ≪ / RTI >

If the tap water does not flow into the second hole 15 but flows into the upper side of the housing, an error occurs in the impeller rotational speed, such as an amount to be metered relative to tap water used. However, It is possible to prevent such a problem.

In addition, a flow bolt may be fastened to the second hole 15 formed in the lower housing 13. This flow bolt functions to open and close the second hole 15. The degree of engagement depends on the expertise of the operator installing the water meter on the site based on the flow rate and flow rate of the actual installation site.

The flow bolt may be fastened to the opposite lower side of the second lower housing 15a of the second hole 15, wherein the flow bolt may be composed of a headless bolt (such as a stud bolt) have.

In the conventional art, when the head of the bolt is fastened to the bottom surface of the housing, it can not be fastened further. Since the fastening degree is released, the head of the bolt is separated from the housing Therefore, when the housing is installed in the casing, an empty space is generated, and the water metering becomes fatal.

In addition, since the head of the bolt protrudes from the bottom surface of the housing, a space between the casing and the housing is unavoidably formed even if the head of the bolt is tightly fixed to the housing.

According to the present invention, since the space between the housing and the casing is not generated, it is possible to overcome the problem caused by the inflow of the tap water described above, and to overcome the above-mentioned problem, There is an advantage that the degree of blocking the hole 15 can be freely adjusted from the fully closed state to the fully opened state.

On the other hand, when the water meter such as the present invention or the conventional one is viewed, a starter is constituted. Such a starting needle generally functions to detect leakage of water even when there is no influx of tap water,

It is also a standard for those who are in the water meter manufacturing industry to judge whether the water meter is acceptable or not before the product launch.

However, as described in the present specification, it is also possible to judge whether the impeller is rotated according to the influx of tap water into the tap water and judge whether the impeller is passed or failed. However, since it is very troublesome to judge whether the water meter is passed or failed, A sensor is used to determine whether the water meter is passed or failed based on the rotation of the starter needle.

A conventional starter is formed in the shape of a star. Although all of the conventional starting needles are not of the above-mentioned type, a common plane area occupies a large portion.

Accordingly, even when the light is received by using the optical sensor and the reflected light is received, there is a problem in that it is difficult to detect the rotation of the starting needle by using the optical sensor. This is because it is difficult to detect the rotation because the area of the surface is considerable.

On the other hand, the starting needle according to the present invention minimizes the surface area and forms a starting needle in the form of *. Thereby, it has a remarkable effect that it is possible to increase the accuracy of detecting the rotation of the starting needle through the optical sensor.

The Applicant has conducted the following experiment to derive the optimum structure of the housing.

Experimental Example  1. Optimal housing  Experiment to derive structure

(Experimental Method)

The experiment is carried out by using a water meter having a housing structure for a water meter according to the present invention having the above-described structure, and an experiment method for measuring the number of revolutions of an impeller configured in a conventional water meter.

At this time, the experiment is performed for each sample (experimental group) by the flow rate according to Q1, Q2, and Q3, and the experiment is performed plural times for each flow rate.

In this case, Q1, Q2 and Q3 are in accordance with the International Organization for Legal Metrology (OIML)

In the future, the water meter according to the present invention should be able to meet the International Organization of Legal Metrology (OIML) standard as the water meter is defined to conform to the international statutory measuring instrument standard.

Refer to [Table 1] for the above specification.

Flow range	Explanation
Q1	Minimum flowrate that should operate within maximum permissible error (MPE)
Q2	The range of flow between the permanent flow and the minimum flow rate. This range is again divided into the high flow rate zone and the low flow rate zone, and the maximum tolerance is defined for each flow.
Q3	Maximum flow at which the meter can measure within the maximum allowable error under the specified operating conditions
Q4	For the shortest time, the meter should be able to measure the maximum flow rate that can be measured within the maximum allowable error, even if it operates at the specified operating conditions.

※ OIML flow range

Based on Table 1, the maximum tolerance in the high flow range (Q2 ≤ Q ≤ Q4) is ± 2% for temperatures between 0.1 and 30 ℃, ± 3% for temperatures above 30 ℃, The maximum allowable error in the flow rate range (Q1 ≤ Q ≤ Q2) is specified to be ± 5% irrespective of the temperature. In the present invention, the same flow rate was measured at the same flow rate, regardless of the high flow rate range and the low flow rate range The error range is reduced as much as possible.

Experimental Example 1 shows the structure according to the present invention described above in which the second hole 15 formed in the housing 10 is closed like the conventional product (2 samples) and opened (1 sample) Experiments were carried out by evaluating the number of revolutions of the impeller and evaluating the error range for each of Q1, Q2 and Q3.

In this case, Q1: 5L, Q2: 5L , Q3: the use of water and 100L of, Q1 is using the pressure of 0.016m ³ / h and, Q2 is and using the pressure of 0.0256m ³ / h, Q3 is 1.6m ³ / h. < / RTI >

The shape of the experiment can be seen in [Table 2].

A and Example Measuring Impeller Rotation Amount of Product	Accumulation of impeller rotation using optical sensor

(Experimental progress)

The progress of the experiment is shown in the following [Table 3].

For reference, the calculation of the error range is based on the above-mentioned pressure of 5L or 100L, the number of revolutions of the impeller should be Q1: 720, Q2: 740, Q3: Was calculated with respect to the reference rotation speed.

	1 sample			Sample No. 2
Primary	Q1	Q2	Q3	Q1	Q2	Q3
	663	693	14320	652	668	13682
	771	795	13992	789	810	13758
			14506			16512
			15200			15425
			14575			16124
			16325			16712
			15235			13958
error range	8%	8%	8%	10%	10%	10%

According to the results of Table 3, it was decided to use the form in which the second hole 15 was opened, but since the tolerance range of 8% is still so large that it can not be approved as a product, The design of the structure of the hole 15 was approached as a design change, as shown in [Table 4].

	Sample 1-1			1-2 samples			1-3 samples			1-4 samples			Samples 1-5
Secondary	Q1	Q2	Q3	Q1	Q2	Q3	Q1	Q2	Q3	Q1	Q2	Q3	Q1	Q2	Q3
	711	702	14562	725	741	14523	660	694	14292	706	770	15958	708	699	13999
	757	765	13998	743	702	14658	725	701	15423	718	707	14521	765	732	14556
	770	796	16415	771	784	15234	765	722	15238	701	725	14652	715	799	16012
			16319			16211			16014			15426			14253
			15486			16328			16109			15398			16411
error range	8%	8%	8%	8%	8%	8%	6%	6%	6%	5%	5%	5%	8%	8%	8%

※ Sample 1-1: The ratio of a ': a in the second hole is 2: 1

※ Sample 1-2: The ratio of a ': a in the second hole is 3: 1

※ Sample 1-3: The ratio of a ': a in the second hole is 4: 1

※ Sample 1-4: The ratio of a ': a in the second hole is 5: 1

※ Sample 1-5: The ratio of a ': a in the second hole is 6: 1

As a result of the experiment, when the ratio of a ': a in the second hole 15 is 5: 1, the error range is the smallest at 5%. Rather, the ratio of the hole size The error range was found to increase sharply.

This means that if the size of the second hole 15 is too large or smaller than a certain value, the amount of water introduced is not constant and the error range increases.

In this case, when the ratio of a ': a is 5: 1, the smallest angle b ° of the internal angle of the second hole 15 is 40 °, and the internal angle of the protruding configuration between the second holes 15 The smallest angle (a °) was 60 °.

That is, when the angles of a ° and b ° deviate from the angles of 60 ° and 40 °, the ratio of a ': a is not 5: 1, which affects the error range.

However, the error range of 5% is still too high to be approved by the product, so it is necessary to reduce the error range.

Therefore, the present applicant conducted the experiment again on the sample 1-4-1 in which the fastening bolts were fastened in the conventional manner and on the sample 1-4-2 in which the fastening bolts were fastened in accordance with the present invention [ Table 5]).

	Sample 1-4-1			Sample 1-4-2
Fourth	Q1	Q2	Q3	Q1	Q2	Q3
	693	769	15352	3	30	14794
	747	754	15798	0	27	15246
	704	725	14594	15	29	15648
error range	4%	4%	4%	-	-	3%

Referring to Table 5, although the error range is reduced as compared with the case where the fastening bolts are not used as the fastening bolts for adjusting the flow amount are fastened, the error range is reduced compared to the fastening bolts fastened according to the present invention Respectively.

This is because, as described above, it is judged that the conventional fastening bolt fastening method can not prevent water from leaking.

However, in the case of the second sample, the number of rotations was evaluated to be excessively low in Q1 and Q2.

However, since it was confirmed that the error range was reduced to 3% in Q3, if the cause of the decrease in the number of revolutions in Q1 and Q2 is found, it is considered that the error range can be reduced.

According to the judgment of the present applicant, it is judged that the impeller can not be rotated if a small amount of water having a flow rate of 5 L is introduced due to the fastening bolt, which will be specifically referred to the following experiments.

The experiment according to [Table 6] was further performed five times again on the samples 1-4-2 in [Table 4].

	1 time			Episode 2			3rd time			4 times			5 times
5th	Q1	Q2	Q3	Q1	Q2	Q3	Q1	Q2	Q3	Q1	Q2	Q3	Q1	Q2		Q3
	0	0	0	671	715	15015	115	468	15539	711	725	15223	716	758	15603

※ Using 1-4-2 samples

As can be seen from Table 6, since the rotation values according to Q1 and Q2 can not be properly measured in the 1st and 3rd rotation, the present applicant is concerned about the sensitivity problem of the optical sensor for measuring the rotation number of the impeller, And the ambient illumination of the lamp was turned off, as shown in [Table 7].

	1 time			Episode 2			3rd time
6th	Q1	Q2	Q3	Q1	Q2	Q3	Q1	Q2	Q3
	75	112	15205	0	0	15062	14	41	15720
	708	741	15250	0	0	15035	11	26	15703

※ Using 1-4-2 samples

As described above, although the evaluation was performed again in consideration of the sensitivity of the sensor, the results were still lower in the rotation values of Q1 and Q2.

Accordingly, the present applicant has found that the lower end portion of the blade portion of the impeller is slightly cut off,

', As shown in Table 8. As a result, it was confirmed that Q1 and Q2 again showed normal values as shown in [Table 8].

Sample	1-4-2-1 Sample use
Turn	1 time			Episode 2			3rd time
Seventh	Q1	Q2	Q3	Q1	Q2	Q3	Q1	Q2	Q3
	699	715	15623	754	718	15490	698	762	15396
	715	776	15582	745	749	15460	731	719	15722
	765	742	15655	731	714	15496	726	717	14747
error range	3%	3%	3%	3%	3%	3%	3%	3%	3%

※ Samples 1-4-2-1: Samples 1-4-2 of the blade structure of the impeller

As described above, by partially changing the shape of the impeller, the error range was reduced to 3% for each sample as shown in Table 8, while the results of the problems Q1 and Q2 were normal.

Thus, the applicant of the present invention adjusts the number of the second holes 15 to further reduce the error range.

This experiment was performed five times in total for a sample having 12 holes of the second hole 15 having the structure of the housing 10 according to the present invention, and the error range was calculated by repeating the experiment three times for each number of times .

Sample	1-4-2-1-1 Sample use
Turn	1 time			Episode 2			3rd time			4 times			5 times
8th car	Q1	Q2	Q3	Q1	Q2	Q3	Q1	Q2	Q3	Q1	Q2	Q3	Q1	Q2	Q3
	701	719	14745	739	720	14735	699	762	14859	709	758	15622	738	742	15425
	735	745	15655	715	725	14795	704	724	14923	715	736	15577	732	719	15441
	712	760	15425	708	721	14856	719	758	15656	737	727	14958	729	758	15655
error range	3%	3%	3%	3%	3%	3%	3%	3%	3%	3%	3%	3%	3%	3%	3%

* Samples 1-4-2-1-1: Samples 1-4-2-1 in which the number of the second holes is 12

As shown in Table 9, when the second hole 15 is composed of 12 balls, the error range is 3%.

Sample	Sample use 1-4-2-1-2
Turn	1 time			Episode 2			3rd time			4 times			5 times
9th	Q1	Q2	Q3	Q1	Q2	Q3	Q1	Q2	Q3	Q1	Q2	Q3	Q1	Q2	Q3
	705	729	14896	729	730	14935	699	752	14959	709	751	15422	728	742	15425
	733	745	15455	715	725	14929	707	734	14923	715	736	15477	732	729	15441
	712	752	15425	708	731	14956	719	754	15456	727	727	14958	719	749	14898
error range	2%	2%	2%	2%	2%	2%	2%	2%	2%	2%	2%	2%	2%	2%	2%

* Samples 1-4-2-1-2: Samples formed with 8 holes in the number of the second holes in the samples 1-4-2-1

As shown in [Table 10], when the second hole 15 was closed with four holes in the eight holes in the twelve holes, the error range was reduced to 2%, and in the second hole 15 ) Was closed with six epoxies, the error range was reduced to 1%.

Thus, finally, the optimized structure of the housing 10 opens the lower direction of the second hole 15, and the number of the second holes 15 is 6, wherein the ratio of the second holes 15 is a The angle of 60 ° and the angle of b ° of 40 °, resulting in a ratio of a ': a of 5: 1.

In addition, the above-described structure of the blade of the impeller is also associated with the structure of the second hole 15.

Sample	Sample use 1-4-2-1-3
Turn	1 time			Episode 2			3rd time			4 times			5 times
Ten cars	Q1	Q2	Q3	Q1	Q2	Q3	Q1	Q2	Q3	Q1	Q2	Q3	Q1	Q2	Q3
	711	741	15274	715	728	15048	721	736	15245	725	745	15141	717	741	15097
	726	746	15152	722	740	15351	724	745	15348	716	734	15245	725	739	15247
	719	739	15189	719	745	15245	722	741	15267	724	742	15311	721	740	15327
error range	One%	One%	One%	One%	One%	One%	One%	One%	One%	One%	One%	One%	One%	One%	One%

* Samples 1-4-2-1-3: Samples 1-4-2-1 in which the number of the second holes is six

On the other hand, the applicant of the present invention has been made up of the above-mentioned conditions according to the present invention, in which six of the 12 holes of the second hole 15 are closed to form six holes (1-4-2-1-3 sample) To investigate the difference in the number of holes (samples 1-4-2-1-3 ') in which six holes were formed at regular intervals while keeping the above ratios from the beginning, the experiment as shown in Table 12 was performed. Respectively.

	Sample 1-4-2-1-2			1-4-2-1-2 'sample number			Sample 1-4-2-1-3			1-4-2-1-3 'sample number
11th car	Q1	Q2	Q3	Q1	Q2	Q3	Q1	Q2	Q3	Q1	Q2	Q3
	715	745	14896	705	734	14957	720	736	15232	721	742	15241
	707	730	14929	729	751	15441	718	745	15351	721	738	15137
	732	731	15477	719	742	15425	723	741	15347	717	739	15291
error range	2%	2%	2%	2%	2%	2%	One%	One%	One%	One%	One%	One%

※ 1-4-2-1-2 'sample: The number of the second hole from the beginning is formed into 8 spheres

※ 1-4-2-1-3 'sample: The number of the second holes from the beginning to six

As can be seen from Table 12, the second hole 15 formed on the lower side of the housing 10 is composed of 8 or 6 holes having a predetermined distance by blocking a certain number of holes in 12 holes, It is confirmed that the error range, which is composed of 8 or 6 intervals, does not affect the error range.

Meanwhile, the following structure is further proposed for a water meter to which the flow path induction and three-axis hall sensor according to the present invention having the above-described structure is applied.

Since the error range is still present even if the error range is reduced to 1% as described above, the flow rate measured by the meter reading unit 20 based on the number of revolutions of the impeller according to the error range exists The actual flow rate.

This is illustrated in Figures 15-17 of the accompanying drawings.

15 to 17 illustrate a water meter to which a three-axis hall sensor is applied. The water meter includes a casing 30 having an inlet 31 and an outlet 38 to which water pipes are connected, A housing 10 provided in the casing 30; an impeller 60 rotatably coupled to the inside of the housing 10; a permanent magnet M coupled to an upper end of the impeller 60; And a meter reading means 20 provided on the upper surface of the housing 10 and having a sensing sensor 20a for detecting the rotation of the permanent magnet M on a lower side thereof.

And a sealing member 70 coupled to the casing 30 to seal the upper opening of the casing 30 according to design conditions.

The sealing member 70 is screwed to the upper circumferential portion of the casing 30 and the center of the sealing member 70 is fixed to the center through the inspecting means 20. An inner wall for covering the inspecting means 20 is formed, The sealing member (70) is constituted by a cover covering the inspection means (20).

The sealing member 70 is pressed so as to be in close contact with the upper surface of the housing 10 and seals the gap between the casing 30 and the meter reading means 20, To the outside.

In this case, the sealing member 70 may be screwed to the casing 30 to cover the meter reading means 20 as shown in the figure, but it may be formed in a simple plate shape as the casing 30 or the first housing 11 And may be configured to be coupled to and cover the inner diameter of the upper housing 11a.

At this time, the sensing means 20 includes a sensing sensor 20a for sensing the rotation of the permanent magnet M and a sensor for sensing the rotation speed of the impeller 60 by receiving a signal from the sensing sensor 20a, (See the dotted line in Fig. 15) connected to the control means and the detection sensor 20a is connected to the insertion groove 21c of the auxiliary inspection means 21 And is inserted into the casing 30 for insertion.

Specifically, the detection sensor 20a is configured to perform the function of a three-axis Hall sensor. Accordingly, the x-axis and y-axis (90 ° phase difference, n / s pole magnetic field sensing of the impeller 60) and the z-axis (upward and downward flow) of the permanent magnet M can be sensed.

The detection sensor 20a senses a change in the flow of the permanent magnet M and specifically detects the height of the permanent magnet M so that the permanent magnet M can move upward and downward As shown in FIG.

It is also possible to use the control means 52 included in the meter reading means 20 or allow the meter reading means 20 to communicate with the external device, Time)

By correcting the rotation value of the impeller 60 based on the sensing value of the sensing sensor 20a sensing the rotation of the permanent magnet M and the flow change of the permanent magnet M through the control means, Even if the number of revolutions is reduced due to an increase in friction in the impeller 60 due to this calculation, the correct number of revolutions can be corrected so that the correct amount of flow can be accumulated.

In this case, the flow change of the permanent magnet M means that when the impeller 60 is raised due to the friction of the impeller 60 depending on the flow rate or the velocity, the permanent magnet M is also heard, Change. Therefore, a change in the flow of the permanent magnet M can be sensed by sensing the distance from the sensing sensor 20a to the permanent magnet M spaced apart.

The correction is based on the number of revolutions of the actual permanent magnet M sensed by the sensor 20a and the flow change sensed by the sensor 20a,

The actual impeller 60 is compared with the rotation value set to rotate with respect to a specific flow rate. When the actual rotation number differs from the set rotation value, the measured impeller 60 is metered and displayed by the set rotation value. To this end, a sensor for determining the flow rate or the flow velocity may be further included.

For example, even when the impeller 60 is set so as to rotate 100 times with respect to 100 L of water, it is impossible to accurately rotate 100 revolutions due to various problems such as actual water flow rate, flow velocity, There may be a ± difference in the number of revolutions by the error range.

Accordingly, in the present invention, a rotation value of 100 revolutions must be obtained through the above-described correction. However, in the case where the revolving revolutions are different within a specific error range such as 95 or 105 revolutions, And outputs it through the display means.

At this time, though not described in detail, the set rotation value may be stored in advance through the control means, and the control means may further include a comparison module or a correction module so as to enable the function for comparison and correction of information.

The lower housing 13 is formed in a cylindrical shape with an open upper surface and a plurality of first holes 13aa and a second hole 15 formed on the circumferential surface of the lower housing 13, And an auxiliary inspection means 21 having a coupling groove 21a concaved upward on the lower side thereof.

The lower housing 13 is provided with a support shaft 15c protruding upward and the first hole 13aa and the second hole 15 are formed in the lower housing 13 in the circumferential direction .

An insertion groove 22c for inserting the detection sensor 20a is formed at the center of the upper surface of the auxiliary reading means 21 in a downward direction.

According to the present invention, the impeller 60 includes a support cylinder 61 extending upward and downward and having an open upper surface, a plurality of blades 62 extending in the radial direction at the periphery of the support cylinder 61, And a rotating shaft 63 extending upward from the inner bottom surface of the supporting cylinder 61. [

At this time, a coupling hole 61a into which the support shaft 15c is inserted is formed at the lower end of the support cylinder 61. [

The outer diameter of the rotary shaft 63 is smaller than the inner diameter of the support cylinder 61 so that a gap G is formed between the outer circumferential surface of the rotary shaft 63 and the inner circumferential surface of the support cylinder 61.

Further, an extension bar 63a extending upward is provided at an upper end of the rotary shaft 63. [ The permanent magnet M is cylindrical and extends in the vertical direction and has a through hole 64 formed at the center thereof and is fitted to the outer side of the upper end of the rotary shaft 63, that is, the outer side of the extension bar 63a .

The length of the extension bar 63a in the up and down direction is longer than the length of the permanent magnet M in the vertical direction. When the permanent magnet M is coupled to the extension bar 63a, Is protruded upward from the permanent magnet M. The extension bar 63a is inserted into and supported by the support tube body 21b formed in the concave upward direction from the upper surface of the coupling groove 21a.

The water meter to which the three-axis hall sensor thus configured is applied is characterized in that the impeller (60) includes a support cylinder (61) whose upper surface is open and which extends in the vertical direction, A plurality of blades 62 and a rotating shaft 63 extending upward from an inner bottom surface of the support cylinder 61. The permanent magnet M extends vertically and has a through hole 64 at the center, And is engaged with the upper end of the upper end of the rotating shaft (63).

The blade 62 may also be formed by cutting a small portion of the lower portion of the blade 62 so that the lower end of the blade 62 of the impeller 60 is &

≪ / RTI >

Therefore, when the impeller 60 is rotated at a high speed, the permanent magnet M can be prevented from slipping, and the diameter of the rotation shaft 63 can be reduced, The flow of tap water passing through the inside of the rotating shaft 63 minimizes the flow of the rotating shaft 63 and the permanent magnet M so that an error is prevented from occurring when the rotation of the permanent magnet M is measured by the detection sensor 20a There is an advantage to be able to do.

The outer diameter of the rotating shaft 63 is smaller than the inner diameter of the supporting cylinder 61 so that a gap G is formed between the outer circumferential surface of the rotating shaft 63 and the inner circumferential surface of the supporting cylinder 61, The vibration generated in the blade 62 is transmitted to the permanent magnet M through the rotary shaft 63. The vibration of the permanent magnet M is transmitted to the permanent magnet M through the rotary shaft 63, And it is possible to more effectively prevent an error from occurring when the rotation of the permanent magnet M is measured by the detection sensor 20a.

The gap G formed between the outer circumferential surface of the rotary shaft 63 and the inner circumferential surface of the support cylinder 61 is opened in the present embodiment. However, as shown in FIG. 17, the rotary shaft 63 It is also possible to seal the inlet portion of the gap G by using the elastic ring body 65 fitted to the outside of the gap G.

The elastic ring body 65 is made of an elastic rubber material and is fitted to the outer side of the rotation shaft 63 so that the outer circumferential surface thereof is in close contact with the inner circumferential surface of the support cylinder 61, Thereby sealing the portion.

When the inlet of the gap G is sealed using the elastic ring body 65 as described above, tap water passing through the inside of the housing 10 flows into the gap G, It is possible to prevent the entire impeller 60 from being vibrated when the impeller 60 is rotated.

The elastic ring body 65 is made of an elastic rubber material and functions as a damper for absorbing vibration when the elastic ring body 65 is appropriately compressed and expanded when vibration is generated in the blade 62 It is possible to more effectively prevent the vibration of the blade 62 from being transmitted to the rotary shaft 63 through the elastic ring body 65.

It is apparent that the present invention is not limited to the configuration of the drawings, as described above with reference to the drawings, only the main points of the present invention are described, and various designs can be made within the technical scope thereof.

Claims (8)

1. A casing (30) of the water meter;

   A housing (10) inserted into the casing (30) together with an impeller;

   A meter reading means (20) inserted into the housing (10) and measuring tap water introduced into the casing (30);

   An impeller 60 rotatably coupled to the inside of the housing 10; And

   And a permanent magnet (M) coupled to an upper end of the impeller (60), the meter comprising:

   The water meter comprises:

   It is sensed that the impeller 60 is flowing due to the deterioration of the flow rate,

   The meter of claim 1, wherein when the impeller (60) is detected to flow, the flow rate of the impeller (60) is corrected and metered.
2. The method according to claim 1,

   Further comprising a sealing member (70) coupled to the casing (30) and configured to seal the opening of the casing (30) and to cover the meter reading means (20) Water meter with Hall sensor applied.
3. The method according to claim 1,

   The housing (10)

   An upper housing 11 composed of a first upper housing 11a and a second upper housing 11b having a smaller diameter than the first upper housing 11 and extending in a downward direction; And

   A first lower housing 13a coupled to a lower side of the upper housing 11 and having an impeller therein and directly connected to a lower side of the second upper housing 11b, And a lower housing (13) composed of a second lower housing (15a) having a small diameter and extending in a downward direction,

   The lower housing (13)

   A second hole 15 for introducing water into the second lower housing 15a for rotating the impeller provided therein, and a plurality of second holes 15 arranged at regular intervals, , And is further opened in the lower direction of the lower housing (13) in addition to the direction of flow.
4. The method according to claim 1,

   The casing (30)

   An inlet mounting member (100) formed in a pipe shape to be mounted on an inlet (31) of the casing (30); And

   And a flow area variable member (200) mounted on the inside of the inlet mounting member and having a shape gradually widening from one end to the other end,

   The shape of the bottom surface portion 250 of the water surface area deformable member is formed in correspondence with the size and shape of the inner surface of the inlet mounting member 100 of the outboard side surface 210 of the water surface area variable member 200, Formed in some form of a circle,

   The protrusion-type fastening means 260 and 261 are respectively formed on the body of the water surface area changeable member 200 and corresponding to the receiving member 100 in the form of a groove for receiving the fastening means 260 and 261, (110, 142) are formed on the upper surface of the water meter.
5. The method of claim 2,

   The lower housing (13)

   A first hole 13aa is formed in the first lower housing 13a at a predetermined interval and the first hole 13aa is in contact with the second upper housing 11b. Lt; / RTI >

   The first hole 13aa and the second hole 15 are inclined so as to have a predetermined direction and the first hole 13aa and the second hole 15 are inclined in mutually opposite directions,

   (a) The inclined width (a ') of the second hole (15)

   Has a size of 1/5 of the radius (a) of the second lower housing 15a,

   (b) The smallest angle among the internal angles constituting the second holes 15 is 40 DEG, and the smallest angle among the internal angles forming the protruding wall faces that distinguish between the second holes 15 is 60 DEG,

   Wherein the second hole (15) is formed in six spheres, and the first hole (13aa) is formed in nine spheres.
6. The method according to claim 1,

   The reading means (20)

   A sensing sensor 20a for sensing the rotation of the permanent magnet M,

   Control means for receiving a signal from the detection sensor 20a and measuring the number of revolutions of the impeller 60,

   And a display means connected to the control means, wherein the flow path guide and the triaxial hole sensor are applied.
7. The method of claim 6,

   The sensing sensor 20a is a three-axis hall sensor, and detects the magnetic field of the 90 ° phase difference, the n-pole and the s-pole of the permanent magnet M, and senses the upward or downward flow change,

   Characterized in that a change in the flow of the permanent magnet (M) flowing together with the impeller (60) is detected when the impeller (60) flows as the friction of the impeller (60) Water meter with sensor applied.
8. The method of claim 6,

   The correction may be performed,

   Based on the number of rotations of the actual permanent magnet M sensed by the sensing sensor 51 and the flow change sensed by the sensing sensor 51, the actual impeller 60 is set to a rotation value And when the actual rotation number and the set rotation value are different from each other as a result of the comparison, the metering is metered and displayed by the set rotation value.

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