KR100400405B1 - A turbine flow meter - Google Patents

Abstract

The present invention relates to a turbine flowmeter which prevents damage to the flowmeter due to cavitation by minimizing fluctuations in the flow rate due to the structure of the flow path when the fluid flows, and improves the flow measurement accuracy without a separate nozzle means. The present invention for achieving the object of the present invention is connected to the pipe is formed at both ends, the inner diameter of the flow meter body having both ends of the opening formed the same as the inner diameter of the pipe; A rotating body disposed on an inner circumferential surface of the flowmeter body with a plurality of blades inclined at a predetermined angle with respect to the inflow direction of the fluid; A front and rear fixed body disposed inside the flow meter main body corresponding to the front and rear of the rotating body to rotatably support the rotating body via a rotating shaft; Supporters fixed to an inner surface of the flowmeter main body by being provided in plural at regular intervals on the outer circumferential surface of the front and rear fixed bodies; A plurality of magnetic inductors formed at an end of each blade of the rotating body and made of a material capable of magnetization; A pickup sensor installed at the flow meter body corresponding to the blade and outputting a signal generated by sensing the magnetic inductor to the calculating means; A turbine flowmeter comprising: a calculation means for calculating a signal detected by sensing a fluid flowing inside the flowmeter main body by the pickup sensor, and a display means for visually displaying the flow rate calculated by the calculation means, wherein the rotation axis is the front axis. It is pre-formed in the fixed body and is rotatably inserted into both sides of the rotating body, the magnetic induction is characterized in that the installation is buried so as to be exposed to the outside of the end of each blade of the rotating body.

Description

Turbine Flowmeters {A TURBINE FLOW METER}

The present invention relates to a turbine flowmeter, and more particularly, to minimize the flow rate fluctuation due to the flow pipe structure when the fluid flows to prevent damage to the flowmeter due to the cavitation phenomenon, and improve the flow measurement accuracy without a separate nozzle means Related to a turbine flowmeter.

In general, a turbine flow meter is used to accurately measure the amount of fluid used in each home or other place, which is installed at a certain position in a pipe to display a numerical value according to the flow rate of the fluid passing through the water pipe. Turbine flowmeters are known in various ways according to their structure and are widely used in practice.

Among such various turbine flowmeters, there is a water meter of the Republic of Korea Patent Registration No. 89-3898 as a technique belonging to the prior art of the present invention.

The configuration of the conventional turbine flowmeter, as shown in Figure 1, in the configuration of a water meter for accumulating the passage amount of water flowing in the water pipe (not shown), both sides as an inner diameter larger than the inner diameter of the water pipe. A detection unit 13 provided on one side of the outer circumferential surface with a built-in pivot 12 which is horizontally supported by a plurality of ribs 11 at the exit-side central position with the stage open, and a detection element 131 and a signal generating circuit; Cylindrical body 10 having connecting means 14 and 15 with water pipes at both ends thereof, and at least one nozzle 202 and pivot support member, which are squarely penetrated between the front and rear surfaces. Water supply nozzle means 20 which is provided with a seal coupled to the inner inlet side of the main body, the horizontally installed one-way rotation material by the water supplied between the nozzle means of the pivot inside the main body An actuating tool (A) configured by an impeller means (30) for operating a signal generating circuit as a signal generating element (304) installed on one side of the blade (301) every time; A case form that is easy to be mounted in any place, the train control circuit for setting the amount of passage using the signal transmitted through the lead wire 50 from the signal generation circuit of the operating port therein and the counter circuit for receiving the counting unit and It is characterized in that it is separated by a remote display (B) consisting of a memory circuit and a digital display indicating section.

However, the prior art configured as described above has the following problems.

First, the cylindrical body 10 has an inner diameter larger than the inner diameter of the water pipe, the connecting portion having an inner diameter almost the same as the inner diameter of the water pipe to the screw portion (101) (101a) formed on the outer peripheral surface of both side end portions of the body (10) (14) (15) is provided, and since the nozzle means 20 is screwed into the cylindrical body 10, the cylindrical body (compared to the flow rate flowing inside the connecting means 14) 10 flows into the inside of the nozzle means 20 until it exits the nozzle 202 of the nozzle means 20, the flow rate is sharply reduced, the cavitation phenomenon occurs, and eventually the vibration and turbid noise in the interior of the circular cylinder body (10) There was a problem caused.

Second, since the signal generating element 304 is provided only in one blade 301 constituting the impeller means 30, the detection element 131 is a signal generating element (1) each time the impeller means 30 Since the signal generated from 304 cannot be detected only once, there is also a problem that the accuracy of measuring the amount of passage of water is low.

Third, since the tap water discharged from the nozzle 202 of the nozzle means 20 is rotatable by impacting the respective blades, the rotation method of the impeller means 30 is actually received by the nozzle means 30. There was also a problem that the manufacturing cost is increased according to the provision.

The present invention has been made to solve the above problems, to minimize the flow rate fluctuation caused by the structure of the flow path when the fluid flows to prevent damage to the flow meter due to the cavitation phenomenon, flow measurement accuracy without a separate nozzle means It is an object to provide a turbine flow meter with improved.

1 is a cross-sectional view showing the internal configuration of a turbine flow meter according to the prior art.

2 is a cross-sectional view showing an internal configuration of a turbine flow meter according to the present invention.

3 is a cross-sectional view of the leader line A-A of FIG.

<Description of the symbols for the main parts of the drawings>

400: flow meter body

401: connection

410: rotating body

411: Blade

421, 431: front and rear fixed body

422, 432: supporters

450: magnetic induction

460: pickup sensor

The present invention for achieving the above object, the connection portion is formed at both ends to be connected to the pipe, both ends of the flow meter body having an opening shape the inner diameter is the same as the inner diameter of the pipe; A rotating body disposed on an inner circumferential surface of the flowmeter body with a plurality of blades inclined at a predetermined angle with respect to the inflow direction of the fluid; A front and rear fixed body disposed inside the flow meter main body corresponding to the front and rear of the rotating body to rotatably support the rotating body via a rotating shaft; Supporters fixed to an inner surface of the flowmeter main body by being provided in plural at regular intervals on the outer circumferential surface of the front and rear fixed bodies; A plurality of magnetic inductors formed at an end of each blade of the rotating body and made of a material capable of magnetization; A pickup sensor installed at the flow meter body corresponding to the blade and outputting a signal generated by sensing the magnetic inductor to the calculating means; A turbine flowmeter comprising: a calculation means for calculating a signal detected by sensing a fluid flowing in the flowmeter main body by the pickup sensor and a display means for visually displaying the flow rate calculated by the calculation means, wherein the rotation axis is the It is pre-formed in the front and rear fixed body is rotatably inserted into both sides of the rotating body, the magnetic induction is characterized in that it is installed buried so as to be exposed to the outside of the end of each blade of the rotating body.

Hereinafter, a preferred embodiment of a turbine flowmeter according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a cross-sectional view showing the internal configuration of the turbine flowmeter according to the present invention, Figure 3 is a cross-sectional view of the leader line A-A of FIG.

As shown, the present invention is a turbine flow meter comprising a calculation means for measuring the flow rate of the fluid flowing in the pipe to calculate the detected signal and a display means 470 for visually displaying the flow rate calculated by the calculation means Apply.

Turbine flowmeter according to the present invention is largely the flowmeter main body 400, the rotor 410, the front and rear fixed body 421 (431), the supporter 422 (432), the magnetic inductor 450 and , Pickup sensor (460).

The flowmeter body 400 is formed in a cylindrical shape with both ends penetrated, and the inner diameter thereof is formed to be the same as the inner diameter of the pipe.

At both ends of the flowmeter body 400, flange type connection portions 401 are formed so as to be coupled to respective ends of the pipe.

Here, reference numeral 401a is a fastening hole formed in the connecting portion 401, through which fastening means such as bolts are fastened.

Here, of course, as the connection portion 401 is provided at both ends of the flowmeter body 400, the connection portion of the pipe should also be provided.

The rotating body 410 is disposed inside the flowmeter main body 400, and is preferably located at the inner center of the flowmeter main body 400.

The outer circumferential surface of the rotating body 410 is provided with a plurality of blades 411 to be inclined at a predetermined angle with respect to the inflow direction of the fluid.

The front and rear fixed bodies 421 and 431 are disposed inside the flowmeter main body 400 corresponding to the front and rear of the rotating body 410 and the rotating body 410 via the rotating shaft 440. ) To rotatably support.

Here, the rotating shaft 440 may be pre-formed in the front and rear fixed body (421, 431), or may be pre-formed to protrude in the center of both ends of the rotating body (410).

That is, if the rotating shaft 440 is pre-formed in the front and rear fixed body (421, 431), the insertion hole into which the rotating shaft 440 is rotatably inserted should be formed in the center of both ends of the rotating body 410, of course. to be.

On the other hand, if the rotating shaft 440 is pre-formed to protrude in the center of both ends of the rotating body 410, the insertion hole through which the rotating shaft 440 is rotatably inserted into the front and rear fixing bodies 421 and 431 should be formed. Of course.

The supporters 422 and 432 are provided on the outer circumferential surfaces of the front and rear fixing bodies 421 and 431 at regular intervals radially, and the other ends thereof are fixed to the inner surface of the flowmeter main body 400.

The reason why the supporters 422 and 432 are installed at regular intervals is to allow the fluid to pass therethrough.

The magnetic induction conductor 450 is installed at an end portion and a horizontal portion of each blade 411 of the rotating body 410.

Here, one of the installation method of the magnetic induction conductor 450 is to be buried so that a part is exposed to the inside of the blade 411 by using a separate insertion device.

The magnetic inductor 450 may be any material as long as it is capable of magnetization except for permanent magnets.

Here, by making the material of the magnetic induction conductor 450 capable of magnetization, it is possible to widen the width to select the magnetic induction conductor 450 corresponding to the pickup sensor 460 to be described later.

The pick-up sensor 460 is installed in the portion corresponding to the blade 411, that is, the flow meter body 400 corresponding to the horizontal portion, and outputs a signal detected by sensing the magnetic inductor 450 to the calculation means. It plays a role.

Referring to the operation of the turbine flowmeter according to the present invention configured as described above are as follows.

First, when a fluid flows from one side pipe and flows into the flowmeter main body 400, the flow does not cause a pressure drop or a pressure rise as in the prior art, and thus no cavitation phenomenon occurs.

The reason why the cavitation phenomenon does not occur as described above is that the inner diameter of the pipe and the inner diameter of the flowmeter main body 400 are the same, so that the change in pressure does not occur when the fluid flows, and eventually flows only at a constant pressure. .

When the fluid flows into the flowmeter body 400 as described above, the fluid is resisted by each blade 411, and then flows out of the flowmeter body 400 through each blade 411 to flow to another pipe. Will be.

Here, when the fluid is resisted by the blade 411, the rotor 410 is eventually rotated.

That is, the faster the flow rate of the fluid, the higher the rotational speed of the rotating body 410, and the slower the flow rate of the fluid, the lower the rotating speed of the rotating body 410.

As described above, as the rotating body 410 rotates at a predetermined speed, the pickup sensor 460 detects the magnetic induction conductor 450 installed in each blade 411.

That is, the number of times of detection of the magnetic inductor 450 is output as the electrical signal to the calculation means.

Here, the present invention can detect the number of passes of the magnetic induction conductor 450 installed in each blade 411 as compared to the disadvantage that the signal generated from the signal generating element can not be detected only once every one revolution of the prior art. The flow rate of the fluid can be measured more precisely.

The calculating means calculates the rotational speed of the rotating body 410 and the flow rate of the fluid in the memorized equation based on the number of times the magnetic induction conductor 450 is output from the pickup sensor 460. Therefore, the flow rate of the fluid is calculated, and the royalties are calculated according to the flow rate of the fluid.

In this way, the numerical value for the flow rate of the various fluids calculated by the calculating means and the numerical value for the royalties are displayed on the display means 470.

As described above, according to the present invention, it is possible to minimize the flow rate fluctuation due to the structure of the flow path when the fluid flows to prevent damage to the flowmeter due to the cavitation phenomenon, and to improve the flow measurement accuracy without a separate nozzle means do.

Claims (1)

A connecting portion 401 is formed at both ends to be connected to the pipe, and the flowmeter main body 400 having an opening shape at both ends formed to have an inner diameter equal to that of the pipe; A rotating body 410 disposed on an inner circumference of the flowmeter body 400 having a plurality of blades 411 at an angle with respect to the inflow direction of the fluid; The front and rear fixed body 421 which is disposed inside the flow meter body 400 corresponding to the front and rear of the rotating body 410 to rotatably support the rotating body 410 via the rotating shaft 440. 431; A plurality of supporters 422 and 432 provided on the outer circumferential surfaces of the front and rear fixed bodies 421 and 431 at regular intervals at a radial interval and fixed to an inner surface of the flowmeter main body 400; A plurality of magnetic inductors 450 installed at ends of the blades 411 of the rotating body 410 and made of a material capable of magnetization; A pickup sensor 460 installed at the flow meter body 400 corresponding to the blade 411 and outputting a signal obtained by sensing the magnetic inductor 450 to the calculation means; In the turbine flow meter consisting of a calculation means for calculating the signal detected by sensing the fluid flowing in the flow meter body in the pickup sensor 460 and a display means 470 for visually displaying the flow rate calculated by the calculation means , The rotating shaft 440 is pre-formed in the front and rear fixed body (421, 431) is rotatably inserted into both sides of the rotating body 410, The magnetic inductor (450) is a turbine flow meter, characterized in that the buried installation so as to be exposed to the outside of the end of each blade (411) of the rotating body (410) .