KR20120111199A - A device for measuring flow of a meter - Google Patents

Abstract

PURPOSE: A device for measuring flow of a meter is provided to make the rotation of impellers easy because a fluid is guided to an outer side of a plurality of the impellers by a flow guide. CONSTITUTION: A device for measuring flow of a meter comprises a body part, a cover part(105), a first impeller part(130), a second impeller part(140), and a controller. The body part comprises an intake unit(110) and an discharging unit. The cover unit covers the body unit. The first impeller unit is arranged in an inner side of the body unit and comprises a first blade(131). The second impeller unit is arranged in the other inner side of the body unit and rotates toward a direction opposite to a rotation direction of the first impeller unit. The second impeller unit comprises a second blade(141) and a third blade(143). The controller senses the rotation number of at least one of the first and second impeller units.

Description

A device for measuring flow of a meter

Embodiment of the present invention relates to a flow rate measuring device of the meter, and more particularly to a flow rate measuring device of the meter that can be made accurate flow measurement.

In general, water meters are instruments for measuring the amount of fluid supplied from a water supply to a place of use, such as a home or a business. The amount of fluid used at the place of use is converted into a water rate and charged to the place of use.

The water meter is provided with an impeller rotatably provided by the energy of the fluid flowing into the water meter.

When the flowing fluid pushes the impeller, the impeller rotates in a predetermined direction, and the rotation speed (or rotation speed) of the impeller may be calculated to calculate the volume of the fluid.

According to the conventional water meter, when the speed of the fluid flowing into the water meter is low, the energy of the fluid is not easily transmitted to the impeller, and accordingly the rotation speed of the impeller is not accurately calculated corresponding to the flow amount of the fluid there was.

In addition, when a foreign matter is present in the water meter, a phenomenon in which the rotation of the impeller is limited by the foreign matter occurs, thereby causing a problem that the volume of the fluid cannot be accurately calculated.

Embodiment of the present invention, in order to solve the above problems, an object of the present invention is to provide an apparatus for measuring the flow rate of the meter can be accurate flow measurement.

The flow rate measuring apparatus of the meter according to the embodiment of the present invention, the body portion provided with the inlet and outlet; A cover part covering the body part; A first impeller provided on an inner side of the body and having a first blade; A second impeller portion provided on the other inner side of the body portion to rotate in a direction opposite to the rotational direction of the first impeller portion, and having at least a second blade and a third blade; A control device for sensing the rotational speed of at least one of the first impeller portion or the second impeller portion is included, wherein at least a portion of one of the plurality of first blades is arranged to be placed between the plurality of second blades It is characterized by.

According to the embodiment according to the above configuration, since a plurality of impeller is provided in the water meter, even if any one of the impeller rotation of the plurality of impeller is limited, there is an effect that the flow rate measurement can be made accurately.

In addition, since a plurality of impellers are arranged to cross each other, even if one impeller may be rotated for a predetermined reason, the other impeller interferes with the one impeller to guide the rotation of the one impeller, There is an advantage that the rotation speed of the plurality of impellers can be measured equally.

In addition, since a flow guide is provided in the water meter and the fluid is guided out of the plurality of impellers by the flow guide, the impeller may be easily rotated.

As a result, a plurality of impellers are provided in the water meter, and as the plurality of impellers are rotated at the same rotation speed, flow rate measurement can be facilitated, thereby improving the reliability of the product.

1 is an external perspective view of a water meter according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along line II ′ of FIG. 1.
3 is a cross-sectional view taken along line II-II 'of FIG. 1.
4 is a perspective view showing a plurality of impellers according to an embodiment of the present invention.
5 is a view showing a flow guide according to a first embodiment of the present invention.
6 is a view showing a flow guide according to a second embodiment of the present invention.
7 and 8 are views showing the operation of a plurality of impeller according to an embodiment of the present invention.
9 is a block diagram showing the configuration of a water meter according to an embodiment of the present invention.
10 is a circuit diagram showing the signal transmission and reception of the water meter according to an embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. It is to be understood, however, that the spirit of the invention is not limited to the embodiments shown and that those skilled in the art, upon reading and understanding the spirit of the invention, may easily suggest other embodiments within the scope of the same concept.

1 is an external perspective view of a water meter according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line II ′ of FIG. 1, and FIG. 3 is a cross-sectional view taken along the line II-II ′ of FIG. 1. 4 is a perspective view showing a plurality of impellers according to an embodiment of the present invention.

1 to 3, the water meter 10 according to the embodiment of the present invention includes a body portion 100 and an upper side of the body portion 100 in which an accommodation space is formed, and the water meter 10 is provided. Control device 200 is provided with a plurality of parts for the control of).

The body portion 100 includes a body portion 101 that forms a fluid flow space and a cover portion 105 that shields the opened upper surface of the body portion 101. The cover portion 105 may be detachably coupled to the body portion 101.

The body portion 101 includes an inlet 110 through which the fluid flows in and an outlet 120 through which the fluid flows out. The inlet 110 and the outlet 120 are provided on opposite sides with respect to the body 101.

The fluid (for example, water) introduced through the inlet 110 passes through the body 101 and is discharged to the outside through the outlet 120.

The control device 200 has a housing cover extending upwardly from the cover portion 105 and shielding an open upper surface of the housing 210 and a housing 210 defining an installation space for installing a plurality of components. 220 is included. The housing cover 220 may be detachably coupled to the housing 210.

The body portion 101 includes a plurality of impeller parts 130 and 140 rotatably provided. In the plurality of impeller parts 130 and 140, the first impeller part 130 disposed on one side of the body part 101 and the second impeller part 140 disposed on the other side of the body part 101 are provided. Included.

The first impeller unit 130 includes a plurality of first blades 131 rotated by the flow energy of the fluid, a first shaft 135 and a first center providing a rotation center of the first blade 131. The first reinforcing member 133 coupled to the upper side of the first blade 131 is included.

The first reinforcing member 133 reinforces the strength of the first blade 131, and transmits rotational force to each blade to facilitate rotation of the first blade 131. The first blade 131, the first shaft 135, and the first reinforcing member 133 may be integrally formed.

The configuration of the second impeller portion 140 is similar to the configuration of the first impeller portion 140. The second impeller 140 includes a plurality of second blades 141, a second shaft 145, and a second reinforcing member 143.

The first blade 131 and the second blade 141 are disposed to cross each other. That is, one blade of the plurality of second blades 141 may be positioned between one blade and the other blade of the plurality of first blades 131.

In this arrangement, as shown in FIG. 2, at least each portion of the first blade 131 and the second blade 141 forms an intersection area A. As shown in FIG. Here, the intersection area A is to be understood as a portion that the virtual rotation source (rotation path) of the first blade 131 and the virtual rotation source (rotation path) of the second blade 141 share with each other. Can be.

Inside the body portion 101, a flow guide 190 for guiding the flow direction of the fluid is further included.

The flow guide 190 may be located inside the inlet 110 and may be located in front of the first and second impeller parts 130 and 140. Here, the "front" may mean a direction in which fluid flows into the first and second impeller parts 130 and 140.

In other words, the flow guide 190 may be disposed between the inlet 110 and the first and second impellers 130 and 140 to guide the flow direction of the fluid.

In detail, the fluid introduced into the body portion 101 may be branched into each of the outer spaces of the first and second impeller parts 130 and 140 by the flow guide 190. Here, the "outer space" may be understood as a space formed between the inner surface of the body portion 101 and the first axis 135 or the second axis 145.

As shown in FIG. 3, the fluid introduced through the inlet 101 is branched left and right by the flow guide 190 to form F1 flow (first flow) and F2 flow (second flow). do.

That is, by the arrangement of the flow guide 190, the fluid introduced from the inlet 110 may be prevented from flowing into the space between the first impeller portion 130 and the second impeller portion 140. have. Here, the space between the first impeller portion 130 and the second impeller portion 140 may be referred to as "inner space" of the first and second impeller portions 130 and 140.

As a result, the F1 flow rotates the first impeller portion 130 in one direction (clockwise direction in FIG. 3), and the F2 flow rotates the second impeller portion 140 in another direction (counterclockwise direction in FIG. 3). ) Can be rotated.

If the fluid moves to the inner spaces of the first and second impeller parts 130 and 140, the rotational direction of the first and second impeller parts 130 and 140 may be rotated in a direction opposite to the direction shown in FIG. 3. The receiving of the first and second impellers 130 and 140 may be limited in rotation.

In this embodiment, in order to prevent such a phenomenon, the flow guide 190 is placed in front of the first and second impeller parts 130 and 140 to branch the flow direction of the fluid.

The F1 flow and the F2 flow are laminated after rotating the first and second impeller parts 130 and 140, respectively, and are discharged to the outside of the body part 101 through the outlet part 120.

Hereinafter, the configuration of the flow guide 190 will be described with reference to the drawings.

5 is a view showing a flow guide according to a first embodiment of the present invention, Figure 6 is a view showing a flow guide according to a second embodiment of the present invention.

Referring to FIG. 5, the flow guide 190 according to the first embodiment of the present invention has a substantially triangular pillar shape.

The flow guide 190 may be disposed so as to be close to the first and second impeller parts 130 and 140 so as not to interfere with the first and second impeller parts 130 and 140. The flow guide 190 is disposed close to the first and second impeller parts 130 and 140, thereby preventing fluid from flowing into the space between the flow guide 190 and the first and second impeller parts 130 and 140. Can be.

That is, the fluid may be prevented from flowing into the inner space of the first and second impeller parts 130 and 140.

In detail, the flow guide 190 includes a guide body 191 having a substantially quadrangular plate shape, and a first tip portion 194 extending in a longitudinal direction in a state of facing the first and second impeller parts 130 and 140. And a plurality of rotational corresponding surfaces 192 and 193 connecting both side portions of the guide body 191 and the first tip portion 194.

First rotation extending from the guide body 191 toward the first tip 194 to correspond to the rotation path 170 of the first impeller 130 on the plurality of rotation corresponding surfaces 192 and 193. Second rotating corresponding surface 193 extending from the guide body 191 toward the first tip 194 to correspond to the corresponding surface 192 and the rotation path 180 of the second impeller portion 140. This includes.

The first rotational corresponding surface 192 extends inclined or rounded from the one end of the guide body 191 to the first tip 194. In addition, the second rotational corresponding surface 193 extends inclined or rounded from the other end of the guide body 191 to the first tip portion 194.

By the inclined or rounded shapes of the first and second rotation corresponding surfaces 192 and 193, the first and second impeller parts 130 and 140 and the flow guide 190 may be prevented from interfering with each other.

Referring to FIG. 6, the flow guide 190 according to the second embodiment of the present invention has a substantially quadrangular pillar shape.

The flow guide 190 includes the first tip 194 and the first and second rotation corresponding surfaces 192 and 193 described in the first embodiment.

In addition, the flow guide 190 is disposed in a direction opposite to the first tip portion 194 and the second tip portion 197 and the inlet portion 110 where the fluid introduced through the inlet portion 110 meet. A plurality of guide surfaces (195, 196) for guiding the flow of the fluid introduced from) is further included.

The second tip portion 197 branches the introduced fluid in two directions. The second tip portion 197 may be disposed at a position that equally divides the inner flow path of the inflow portion 110. That is, when the second tip portion 197 extends to the inflow portion 110, the internal space (flow path) of the inflow portion 110 may be equally divided.

By such a configuration, the fluid flowing in the inlet 110 may be branched in the same amount to form the F1 flow and the F2 flow.

The plurality of guide surfaces 195 and 196 include a first guide surface 195 for guiding the F1 flow and a second guide surface 196 for guiding the F2 flow.

The first guide surface 195 extends obliquely or roundly from the second tip portion 197 toward the outer space of the first impeller portion 130. The second guide surface 196 extends obliquely or roundly from the second tip portion 197 toward the outer space of the second impeller portion 140.

By the inclined or rounded shapes of the first and second guide surfaces 195 and 196, it may be effectively guided that the fluid flows to the outer space of the first and second impeller parts 130 and 140.

7 and 8 are views showing the operation of a plurality of impeller according to an embodiment of the present invention.

7 and 8, the first impeller portion 130 according to the embodiment of the present invention is rotated clockwise by the F1 flow, and the second impeller portion 140 is half by the F2 flow. Can be rotated clockwise.

The distance l1 from the first shaft 135 of the first impeller portion 130 to the second shaft 145 of the second impeller portion 140 is the length of one blade of the first impeller portion 130. ) Is formed to be smaller than the sum of the length of the one blade (L3) of the second impeller portion 140.

That is, one blade of the first impeller portion 130 may be disposed to be placed between the plurality of blades of the second impeller portion 140. Therefore, assuming that the first impeller 130 is rotated while the second impeller 140 is fixed, the first impeller 130 may interfere with the second impeller 140. Can be.

The rotation path 170 of the first impeller portion 130 and the rotation path 180 of the second impeller portion 140 have an area 175 (“A” portion of FIG. 2) shared with each other. The shared area 175 may be understood as an area where the first impeller portion 130 and the second impeller portion 140 interfere with each other.

On the other hand, when the fluid is branched by the flow guide section 190, the F1 flow and the F2 flow form approximately the same amount (or velocity). Therefore, in a general situation, the first and second impeller parts 130 and 140 may be rotated without interfering with each other.

However, when the amounts of the F1 flow and the F2 flow are different from each other, or foreign matter is caught in the first impeller portion 130 or the second impeller portion 140, rotation is restricted, the first and second impeller portions 130 and 140. The rotational speed of may be formed differently. In this case, the first and second impeller parts 130 and 140 may interfere with each other in a rotating process.

As shown in FIG. 7, when the speed of the second impeller portion 140 is lower than that of the first impeller portion 130, the first blade 132 constituting the first impeller portion 130 may be In contact with the second blade 142 constituting the second impeller 140.

In detail, the first surface 132a of the first blade 132 interferes with the third surface 142a of the second blade 142. That is, the first surface 132a pushes out the third surface 142a. Therefore, the second impeller 140 may be rotated together with the first impeller 130 by the pressing force of the first blade 132.

Here, at least a portion of the first blade 132 is disposed between the second blade 142 and the third blade 143 of the second impeller 140.

On the contrary, when the speed of the first impeller 130 is lower than the speed of the second impeller 140, the first blade 132 is in contact with the third blade 143.

In detail, the second surface 132b of the first blade 132 interferes with the fourth surface 143a of the third blade 143. That is, the fourth surface 143a pushes out the first surface 132a. Therefore, the first impeller 130 may be rotated together with the second impeller 140 by the pressing force of the third blade 143.

Here, the second surface 132b may be understood as the opposite surface of the first surface 132a.

That is, according to the speed magnitude (speed large or small) of the first impeller portion 130 or the second impeller portion 140, different surfaces of the first blade 132 to the second blade or the third blade Selectively interfering.

In summary, even if rotation of at least one of the plurality of impeller portions 130 and 140 is limited according to a predetermined reason, the rotation of the plurality of impeller portions 130 and 140 is caused by the action that the plurality of impeller portions 130 and 140 interfere with each other. The speed can be made equal.

Here, the predetermined reason may include a case where two flow amounts branched by the flow guide 190 are different, or a foreign material is caught in the first impeller portion 130 or the second impeller portion 140. Can be.

As a result, regardless of the amount of fluid flowing into the body portion 100, the plurality of impellers (130, 140) can be rotated at the same rotation speed with each other there is an effect that the accurate measurement of the flow rate can be made. Of course, the data on the rotational speed and the flow rate may be obtained by a predetermined table (calculation formula).

The flow rate passing through the water meter 10 may be measured by detecting a rotational speed of at least one impeller of the plurality of impellers 130 and 140.

On the other hand, the plurality of impeller structures according to the present embodiment are distinguished from the plurality of gear structures. The plurality of gear structures have a structure in which the plurality of gears are always engaged and interlocked, and thus, when foreign matters are caught in the meshed portions of the gears, the plurality of gears may not easily rotate.

The present embodiment has the effect of overcoming the problem of the limitation of rotation due to foreign matter jamming since the plurality of impellers selectively interfere when the emergency condition occurs, that is, when corresponding to the "predetermined reason" described above.

Hereinafter, the configuration and operation of the control device 200 will be described.

9 is a block diagram showing the configuration of a water meter according to an embodiment of the present invention, Figure 10 is a circuit diagram showing the signal transmission and reception of the water meter according to an embodiment of the present invention.

9 and 10, the control device 200 of the water meter 10 according to the embodiment of the present invention, the first sensor 240 and the second sensor 250 and the second sensor 250. The control unit 220 for receiving the on / off signal of the included.

As shown in FIG. 10, the first sensor 240 generates a transmission signal. When the blocking unit 138 is placed between the first sensor 240 and the second sensor 250, the second sensor 250 is turned off so that a predetermined signal (eg, a high signal) is controlled by the controller 220. ) Is entered.

Here, the blocking unit 138 is configured to be coupled to the first impeller unit 130. In addition, the blocking unit 138 may be selectively disposed between the first sensor 240 and the second sensor 250 while the first impeller unit 130 is rotated so that the first and second sensors ( Limit signal transmission and reception of 240,250.

On the other hand, if the blocking unit 138 is not disposed between the first sensor 240 and the second sensor 250, the second sensor 250 is turned on so that a predetermined signal (for example, a low signal) is turned on. It is input to the control unit 220.

The controller 220 counts the rotation speed of the first impeller unit 130 by the rotation speed counting method according to whether the high signal or the low signal is input from the second sensor 250.

In FIG. 9, the blocking part 138 is provided to the first impeller part 130, and the rotation speed of the first impeller part 130 is counted, but the first impeller part 130 and the first impeller part 130 are counted. It may be possible to count the number of revolutions of the second impeller 140 by placing a block in the second impeller 140 that is rotated at the same speed.

Another embodiment of the method for detecting the rotational speed of the impeller is proposed.

The control device for detecting the rotational speed of the impeller may include a permanent magnet and a reed switch.

The meter using the reed switch is configured such that the permanent magnet is attached to the rotatable impeller and the reed switch is disposed outside the impeller.

In the process of rotating the impeller and the permanent magnet, the permanent magnet acts on the reed switch to selectively turn (ON) / off (OFF) the reed switch. As the reed switch is turned on and off, an electrical pulse is generated, and the number of pulses is counted, so that the rotation speed of the impeller can be measured.

Another embodiment is proposed.

The control device for detecting the number of revolutions of the impeller may include an induction coil and a metal member.

The meter using the induction coil is configured such that a metal member is attached to the rotatable impeller and the induction coil is disposed outside the impeller.

In the process of rotating the impeller and the metal member, the metal member acts on the induction coil, the induction coil can be measured the number of revolutions of the impeller by the induction phenomenon.

10: water meter 100: body
110: inlet 120: outlet
130: first impeller portion 135: first axis
140: second impeller portion 145: second axis
200: control device 210: switch
220: control unit 230: memory
240: first sensor 250: second sensor

Claims (10)

A body part having an inlet and an outlet;
A cover part covering the body part;
A first impeller provided on an inner side of the body and having a first blade;
A second impeller portion provided on the other inner side of the body portion to rotate in a direction opposite to the rotational direction of the first impeller portion, and having at least a second blade and a third blade;
A control device for detecting the number of revolutions of at least one of the first impeller portion or the second impeller portion is included,
At least a portion of one of the plurality of first blades is disposed to be placed between the plurality of second blades. The method of claim 1,
And a rotation path of the first blade and a rotation path of the second blade or the third blade intersect each other. The method of claim 1,
The first blade includes a first surface forming one surface and a second surface defined as a surface opposite to the first surface,
According to the magnitude of the rotational speed of the first impeller portion and the second impeller portion, the first surface and the second surface is a meter for measuring the flow rate of the meter and the second blade, respectively selectively interfering. The method of claim 1,
The body portion,
Flow meter for measuring the flow rate of the meter further comprises a flow guide for guiding the flow of fluid introduced through the inlet. The method of claim 4, wherein
The flow guide,
The flow meter of the meter, characterized in that disposed between the inlet, the first impeller and the second impeller. The method of claim 4, wherein
The flow guide,
The flow rate measuring device of the meter, characterized in that for branching the fluid flowing through the inlet into the outer space of the first impeller portion and the outer space of the second impeller portion. The method according to claim 6,
In the flow guide,
A tip portion where the fluid introduced through the inlet portion meets;
A first guide surface extending obliquely from the tip portion to the outside of the first impeller portion; And
And a second guide surface extending obliquely from the tip portion to the outside of the second impeller portion. The method of claim 1,
The first impeller portion and the second impeller portion is a flow rate measuring device of the meter, characterized in that rotated at the same rotational speed. The method of claim 8,
The first impeller portion and the second impeller portion,
The flow rate measuring device of the meter is rotated by the first flow and the second flow formed by branching the flow introduced through the inlet. The method of claim 8,
If a cause occurs that the rotation speed of the first impeller portion and the second impeller portion is formed differently,
The first impeller portion and the second impeller portion interfering with each other, the flow rate measuring device of the meter.

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