KR200173841Y1 - Device for measuring quantity of flow - Google Patents

Abstract

The present invention relates to a flow rate measuring device capable of accurately measuring the flow rate of water, oil, liquefied gas or a fluid of the same kind.

Such a flow measuring device includes a case in which an inlet and an outlet are formed; A housing mounted inside the case to introduce the fluid introduced into the inlet and to discharge the introduced fluid; An impeller rotatably installed in the housing, and one end of which transmits a rotational force to a flow rate calculation means; Means for impinging the impeller's blades with the fluid introduced into the inlet to rotate the impeller without power; It provides a flow rate measuring device comprising a means for discharging the fluid to the outlet side by the impeller rotating by the means.

One side of the housing is formed with a plurality of protrusions for guiding the fluid introduced through the inlet toward the inlet hole, characterized in that the inlet hole and the outlet hole is configured to form a predetermined inclination angle.

Description

Flow measuring device {Device for measuring quantity of flow}

The present invention relates to a flow rate measuring device, and more particularly to a flow rate measuring device that is capable of accurately measuring the flow rate of water, oil, liquefied gas or the like fluid.

In general, a number of flowmeters used in industrial or general households are known, and the flow rate is measured by directly using the energy generated by the fluid movement, and the flow rate is calculated by measuring the speed at which the fluid moves from the outside. Lee representative It is widely used as an enemy.

Flowmeters for measuring the flow rate using the energy of the fluid include volume, area, differential pressure, turbine flowmeter, and the like. Ultrasonic and mass flowmeters are used to calculate the flow rate by measuring the velocity of the fluid.

Among them, turbine type flowmeters, in which a turbine or impeller is installed in a fluid passage, and the flow rate of the turbine or impeller is measured, are used in various fields.

The turbine flow meter rotates a rotating body such as a turbine or an impeller as the fluid flows through the inlet, and then discharges the fluid through the outlet.

At this time, the flow rate passed during the rotation of the rotating body is calculated in advance, and the number of rotations of the rotating body is counted to display the flow rate, which refers to the amount of fluid flowing in a unit time, in a display unit in liters or gallons as a measuring unit. .

However, such a conventional flow rate measuring device displays a flow rate of the fluid by installing a rotating body rotating in accordance with the flow of the fluid in the flow direction of the fluid, and detecting the number of revolutions of the rotating body, the rotating body installed in the flow of the fluid Even though the flow velocity is stable, it is difficult to measure the exact rotational speed of the fluid due to the vortex, turbulence, or inlet or outlet that resists the flow of the fluid as the fluid flows, and thus it is difficult to measure the accurate flow rate.

In addition, the rotating body is supported by the support rotates, at the tip of the support Since the resistance of the fluid generated when the fluid is introduced and discharged is transmitted to the rotating body, the rotational speed of the rotating body is reduced, so that the flow rate cannot be accurately measured.

Therefore, the present invention is devised to solve the conventional problems as described above, and an object of the present invention is to provide a flow rate measuring device capable of accurately measuring the flow rate of water, oil, liquefied gas or the same type of fluid It is.

In order to achieve the object of the present invention as described above, and the inlet and outlet is formed; A housing mounted inside the case to introduce the fluid introduced into the inlet and to discharge the introduced fluid; An impeller rotatably installed in the housing, and one end of which transmits a rotational force to a flow rate calculation means; Means for impinging the impeller's blades with the fluid introduced into the inlet to rotate the impeller without power; It provides a flow rate measuring device comprising a means for discharging the fluid to the outlet side by the impeller rotating by the means.

One side of the housing is formed with a plurality of protrusions for guiding the fluid introduced through the inlet toward the inlet hole, characterized in that the inlet hole and the outlet hole is configured to form a predetermined inclination angle.

The wing formed in the impeller can receive less resistance of the fluid, characterized in that the end portion is formed in the inclined surface to smoothly discharge the fluid introduced into the housing.

1 is an exploded perspective view of a flow rate measuring device according to the present invention.

Figure 2 is an exploded perspective view of a flow measuring device according to the present invention viewed from another direction.

Figure 3a is an enlarged perspective view of the impeller housing of the flow measuring device according to the present invention.

3B is a plan sectional view showing the inflow hole of FIG. 3A.

3C is a cross sectional view of the discharge hole of FIG. 3A;

Figure 4 is an impeller front view of the flow measuring device according to the present invention.

5 is a cross-sectional view of the combined flow measuring device according to the present invention.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention described in more detail Order.

1 to 2 is an exploded perspective view of the flow rate measuring apparatus according to the present invention, Figures 3 and 4 is a view showing the impeller housing and the impeller provided in the flow rate measuring apparatus of the present invention, Figure 5 is a flow measurement of the present invention A cross-sectional view of the state in which the apparatus is coupled, and 2 denotes a case in which the flow measuring device is incorporated.

The case 2 has an inner space 4 and has a cylindrical shape with one side open, and an inlet 6 through which fluid is introduced is provided on the opposite side of the opening, and the case 2 has an inner space. A discharge port 8 communicating with (4) is formed so that the fluid can escape from the case 2 after the flow rate is measured.

The fluid (water, oil, liquefied gas, etc.) flowing into the inlet 6 is preferably removed in a state in which the foreign matter contained in the fluid is removed in a pre-treatment process and the bubbles are made to have a predetermined size, and such a flow rate is more accurate. Provide the conditions for the measurement.

An inner surface of the case 2 is provided with a locking step 10 formed in the circumferential direction, and the case 2 is in contact with the locking step 10 while maintaining a predetermined distance from the inlet 6. The impeller housing 12 is located in the inner space 4.

As shown in FIGS. 2 and 3, the housing 12 includes a main body 16 having an inner space 14 and a flange 18 formed at an outer periphery of the main body 16. The housing 18 is positioned while the flange 18 is in surface contact with the locking step 10 of the case 2.

A plurality of inlet holes 20 formed at regular intervals on both sides of the outer peripheral portion of the main body 16 of the housing 12 with the flange 18 therebetween, and a predetermined distance from the inlet hole 20. The discharge holes 22 are formed to deviate from each other while being maintained, and a plurality of discharge holes 22 are formed on the surface corresponding to the inlet 6 so that the fluid introduced into the inlet 6 can be dispersed and introduced into the plurality of inlet holes 20. Projections 24 are provided.

As shown in FIGS. 3A and 3B, the inflow hole 20 has an internal space 14 so that fluid can be smoothly introduced into the internal space 14 (see FIGS. 1 and 2) of the main body 16. The inclined surface 26 is formed to be inclined toward), and the cross-sectional area thereof is gradually narrowed while going to the internal space 14.

As shown in FIGS. 3A and 3C, the discharge hole 22 is an inclined surface 26 formed in the inlet hole 20 as the fluid flowing into the internal space 14 (see FIGS. 1 and 2) is discharged. It is provided with an inclined surface 28 formed in the same direction as the width of the main body 16, the width of the inlet hole 20 located in the inner space 14 is formed wider than the cross-sectional area of the inlet fluid can be easily discharged. .

In addition, the protrusions 24 formed on one side of the main body 16 guide the fluid introduced through the inlet 6 so as to be dispersed and introduced in the direction of the inlet hole 20. And extend in the radial direction, respectively.

The protrusions 24 have an arc-shaped structure having the same direction as that of the inclined surface 26 so that fluid can smoothly flow into the inclined surface 26 of the inflow hole 20. It is formed so that its height gradually decreases as it goes to the outer side.

Therefore, the fluid is introduced into the inlet hole 20 while hitting the protrusions 24 and causing a circumference phenomenon. 14) the fluid can be easily introduced.

A support 30 is fixedly installed at a central portion of one side of the inner surface of the housing 12 having such a structure, and an impeller 32 supported between the fixed bodies (not shown) inside the support 30 is provided.

The impeller 32 has a rotating shaft 36 having a gear 34 formed at one end thereof, and a plurality of blades 38 formed at regular intervals in the circumferential direction of the other outer circumferential surface of the rotating shaft 36.

The wing 38 is discharged through the discharge hole 22 while the fluid flows through the inlet hole 20 of the housing 12 by the force of the fluid flowing through the inlet hole, the inlet hole 20 And the discharge hole 22 are formed to be offset from each other and have inclined surfaces 26 and 28 formed in the same direction, so that the fluid is easily introduced and discharged.

The flow rate of the flow rate is calculated so that the volume of the impeller housing 12 is calculated and the flow rate passing when the impeller 32 is rotated by one rotation is cumulatively calculated to represent the number of revolutions of the impeller.

In addition, the outer surface of the wing 38 of the impeller 32 has an inclined surface 40 as shown in FIG. 4 so that the fluid introduced into the inner space of the housing 12 is more easily discharged. It is made to be.

The inclined surface 40 is formed in the direction in which the impeller 32 rotates to receive less resistance of the fluid when the impeller 32 rotates, and the contact area with the fluid introduced into the housing 12 is increased. The fluid is discharged more smoothly through the discharge hole 22.

In order to minimize the friction force when the impeller 32 rotates, a ball 42 is inserted into the end of the support 30 fixed to the housing 12, and the ball 42 is in point contact with the ball 42 and the rotating shaft A curved groove 48 is formed in the spindle 46 inserted into and fixed to the groove 44 of the 36.

The ball 42 may be made of a ceramic having good durability, and the spindle 46 may be a phosphorescent fire having a high wear resistance and a small resistance coefficient.

Ball 42 and the spindle 46 made of such a material minimizes the coefficient of resistance when the impeller 32 rotates.

The support rod 50 is mounted on one side of the rotating shaft 36 of the impeller 32, and the support rod 50 is rotatably installed on a fixed body (not shown).

On one side of the housing 12 into which the impeller 32 is inserted, the support plate 54 is fixedly installed, and the rotary shaft 36 of the impeller 32 protrudes through the hole 56 formed in the support plate 54. do.

The gear 34 formed on the protruding rotation shaft 36 is configured to be connected to the flow rate calculation means 52 to represent the flow rate.

The flow rate calculation unit 52 is a microprocessor for calculating the gear ratio for converting the rotational speed of the impeller 32 into a flow rate by rotating the operation gears as the impeller 32 rotates with the operation gears not shown. Not shown).

For example, assuming that the impeller 32 rotates once when 0.1 liter of fluid flows in, the 1-liter is displayed by the flow rate calculation unit 52 when the impeller 32 makes 10 revolutions. You can check the flow rate.

At this time, the numerical gear is connected to the operation gear to display the number immediately, or the rotation speed of the gears is sensed to indicate the flow rate measured by the electrically connected conversion means.

The measured amount may be expressed in gallons or other flow measurement units in the same manner as described above.

In the present embodiment, the flow rate is displayed by the rotation of the operation gear meshed with the impeller, but is not limited thereto. A detection sensor is attached to the periphery of the impeller or the impeller, and the detection sensor calculates the rotation of the impeller and flow rate. It is also possible to display through the calculation means 52.

The flow measuring device as described above is installed in the longitudinal direction by placing the case 2 in the assembled state as shown in Figure 5, the fluid formed by bubbles of a constant size to remove impurities through a filtration device, etc. When the inlet (6) is introduced into the fluid hits the central portion of one side of the housing 12 by the hydraulic pressure.

Then, the fluid has a protrusion 24 due to the protrusions 24 formed in an arc shape. The fluid is rotated counterclockwise as viewed from the formed direction, and the fluid is dispersed and introduced into the internal space 14 of the housing 12 through a plurality of inlet holes 20 having inclined surfaces in the same direction as the rotating fluid. The impeller 32 rotates with the force of and the fluid in the inner space 14 is discharged through the plurality of discharge holes 22.

At this time, the inlet holes 20 and the outlet holes 22 are formed to be inclined so that the fluid flows naturally, and the mouth of the inlet hole 20 and the outlet hole 22 so that the fluid can be easily entered. The outlet side cross-sections are formed differently to minimize the resistance of the fluid when the impeller 32 rotates.

As described above, the flow rate measuring device according to the present invention has an inlet hole and an outlet hole formed in a direction in which the impeller rotates, thereby minimizing the resistance of the fluid when the impeller rotates, and can minimize the frictional force when the impeller rotates. So that accurate flow rate can be measured.

Claims (16)

A case having an inlet and an outlet formed therein; A housing mounted inside the case to introduce the fluid introduced into the inlet and to discharge the introduced fluid; An impeller rotatably installed in the housing, and one end of which transmits a rotational force to a flow rate calculation means; Means for impinging the impeller's blades with the fluid introduced into the inlet to rotate the impeller without power; And means for discharging fluid to the outlet side by means of an impeller rotating by the means. The flow rate measuring apparatus according to claim 1, wherein one side of the housing is provided with a dispersing means for distributing and supplying the fluid introduced through the inlet to the inlet. The flow rate measuring device according to claim 2, wherein the dispersion means is a projection. The flow rate measuring apparatus according to claim 3, wherein the protrusion is formed radially. The method of claim 3 or 4, wherein the protrusion is gradually increasing in height toward the outer surface Flow rate measuring device characterized in that lowered. The method of claim 1, wherein the housing is provided with a plurality of inlet and outlet holes formed in the circumferential direction at regular intervals, and between the inlet and outlet holes in surface contact with the engaging jaw in the case position of the housing Flow rate measuring device, characterized in that provided with a flange forming a boundary between the inlet and outlet holes. The flow rate measuring apparatus according to claim 6, wherein the inlet hole and the outlet hole have a predetermined inclination angle. The flow rate measuring apparatus according to claim 7, wherein the inlet hole is gradually narrowed in cross section while going to the inner space of the housing, and the outlet hole is provided so that the cross section is gradually widened in the inner space of the housing. The flow rate measuring apparatus according to claim 1, wherein the flow rate calculating means is configured to calculate the rotation of the calculation gear engaged with the rotation axis of the impeller. The method according to claim 1, wherein the flow rate calculation means is attached to the impeller or around the sensor, the sensor is made to measure the flow rate by detecting the number of revolutions of the impeller Flow rate measuring apparatus characterized in that. The flow rate measuring apparatus according to claim 1, wherein the impeller includes a rotating shaft and a plurality of blades formed in a circumferential direction of one side end of the rotating shaft, and these blades have one end surface formed of an inclined surface. The flow measuring apparatus according to claim 11, wherein a spindle having a curved groove is inserted into the rotating shaft, and the spindle is in point contact with a ball of a support fixed to the housing to minimize rotational frictional force. The flow rate measuring apparatus according to claim 12, wherein the spindle is made of an irradiated fire having strong wear resistance. The flow rate measuring apparatus according to claim 12, wherein the ball formed on the support is made of a ceramic material having high abrasion resistance. The impeller of claim 1 wherein the means for impinging the fluid against the vane of the impeller is such that the fluid introduced from the inlet of the case is formed at regular intervals in the circumferential direction of the housing body and through the inlet formed inclined towards the vane of the impeller. Flow measuring device, characterized in that configured to hit the wing. The flow rate measuring apparatus according to claim 1, wherein the means for discharging the fluid is configured such that the fluid introduced through the inlet hole of the housing is discharged through the outlet hole formed in the housing while rotating the impeller.