JP4115004B2 - Flowmeter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flow meter that measures a flow rate based on the number of rotations per unit time of a built-in rotating body.
[0002]
[Prior art]
Conventionally, in such a flow meter, an outflow inlet is provided in a casing having a circular cross section, and a rotating body provided with blades is provided rotatably in the casing.
[0003]
[Problems to be solved by the invention]
However, in the above flow meter, since the gap between the tip of the blade and the inner peripheral surface of the casing is very small, inclusions in the fluid are caught in the gap, resulting in rotation failure in the rotating body, etc. There was a problem that had to be solved.
[0004]
[Means for Solving the Problems]
In view of the problem that the performance deteriorates with time due to inclusions in the fluid based on the above-described conventional technology, the present invention provides a casing in which upper and lower outlets are provided, a plurality of vortex plates provided in the casing, A rotating body provided rotatably below the vortex plate, the rotating body is provided with a detected portion, a transmitting portion of an identification element of the detected portion is provided on the casing, and the detected portion is provided outside the transmitting portion. In the flow meter provided with the sensor for detecting the identification element , the casing is constituted by the casing main body provided with the inflow port and the lower lid part provided with the outflow port, and the vortex plate is accommodated in the casing main body. The upper receiving seat is formed on the inner peripheral surface of the lower lid portion, and the lower receiving seat of the rotating body protrudes from the center of the upper surface of the lower lid portion, and the inner receiving portion of the vortex plate is fixedly provided at the upper center of the cylindrical body. A conical concave surface on the bottom and a pointed shape at the top of the rotating body A slat is provided radially at the bottom of the head, the bottom of the bottom provided at the bottom of the slat is a conical concave surface, the top of the head is within the conical concave surface of the upper seat, and the lower seat of the lower lid is Discriminating element from the detected part that has passed through the transmission part by locating in the conical concave surface of the rotator , vortexing the fluid flowing into the casing from the inlet / outlet in the casing and rotating the rotator Is detected by a sensor, and the flow rate is measured by the number of rotations of the rotating body to solve the above-mentioned problem.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, in the flow meter 1 provided in the middle part of the flow path P, a casing 4 having inflow ports 2 and 3 formed in the upper and lower parts, and a vortex plate 5 formed in the casing 4, 5a ... and the vortex plate 5, 5a ... rotator 6 provided rotatably below.
[0006]
As shown in FIGS. 1 to 7, the casing 4 includes a casing body 7 having a downward opening shape and a lower lid portion 8 that closes the lower opening portion of the casing body 7.
In the casing body 7, as shown in FIGS. 1 to 6, the inflow port 2 is projected at the center of the upper portion, and a recessed portion 9 is formed on the side portion, and the inner portion of the recessed portion 9 is formed as a rotating body. 6 and an inclined surface 10 so as not to obstruct the rotation of the rotating body 6, and a transmitting portion 11 of an identification element of a detected portion 27 described later is formed on the inclined surface 10, and the transmitting portion 11 is a casing. 4 or the central portion of the inclined surface 10 is made transparent, or the central portion of the inclined surface 10 is made a thinned concave portion so that the lines of magnetic force can be transmitted.
As shown in FIGS. 1, 2, 3, and 7, the lower lid portion 8 is provided with an outflow port 3 protruding from the lower eccentric position of the lid body 12, and formed in a conical shape at the center of the upper surface. A lower receiving seat 13 of the body 6 is projected, and an annular protrusion 14 is formed along the outer peripheral side of the lid body 12.
2, 3, and 7, locking projections 15, 15 a... Are projected from the outer peripheral portion of the lid main body 12 in the lower lid portion 8, and the vertical grooves are formed below the inner peripheral surface of the casing main body 7. 16 and a locking groove 18, 18a, which is formed by a transverse groove 17 formed in a direction perpendicular to the upper end of the vertical groove 16, is formed, and the locking projections 15, 15a, and the vertical grooves 16 in the locking grooves 18, 18a are formed. When the lower lid portion 8 is inserted from below and reaches the upper end of the vertical groove 16, the lower cover 8 is rotated to move the locking projections 15, 15a... The lower lid portion 8 is fixed to the casing body 7.
[0007]
Further, in the vortex plates 5, 5a, as shown in FIGS. 2, 3, and 8, the vortex plates 5 and 5a are formed on the inner peripheral surface of the cylindrical body 19 accommodated in the casing 4, and the outer peripheral portion is formed in the cylindrical body 19. The inner peripheral portion is fixed to the upper receiving seat 20 of the rotating body 6 provided at the upper center of the cylindrical body 19, and the height difference on the outer peripheral side is made larger than the inner peripheral side so that the rotating body 6 is accommodated below the inner peripheral portion. A space is formed.
Further, the upper side of the vortex plate 5, 5a is a horizontal side and the lower side is an inclined side, and the other upper side is positioned above one adjacent lower side.
In addition, the space between a pair of adjacent vortex plates 5, 5a is widened, and a notch 22 corresponding to the interval portion 21 is formed in the cylindrical body 19, and both sides of the notch 22 are formed on both sides of the recessed portion 9. It is in contact with the inner surface of the surface.
Further, the lower surface of the upper receiving seat 20 supports the upper end portion of the rotating body 6 as a conical concave surface 23.
[0008]
In the rotating body 6, as shown in FIGS. 2, 3, and 9, a head portion 24 having a pointed upper portion, and blades 25, 25 a. It is comprised by the bottom part 26 provided in the lower part of this blade 25, 25a ....
On the side surface of the head 24, a detected portion 27 that is detected by a sensor 29 described later is provided, and the detected portion 27 is formed by exposing a magnetic body embedded in the head 24 to the outside, Alternatively, a unique color that can be detected by the sensor 29 provided on the side surface of the head 24, such as applying a different color to a part of the side surface of the head 24, is used.
In the blade plates 25, 25a, the bottom surface of the bottom portion 26 formed so that the outer surface is inclined downward and outward so that the width of the blade plates 25, 25a is gradually widened downward. The conical concave surface 28 is used.
Then, the upper portion of the head 24 is positioned in the conical concave surface 23 of the upper receiving seat 20, and the lower receiving seat 13 of the lower lid portion 8 is positioned in the conical concave surface 28 of the rotating body 6, so that the rotating body 6 can rotate freely. I have to.
[0009]
In FIGS. 1 and 2, reference numeral 29 denotes a sensor for detecting an identification element of the detected part 27 that has passed through the transmission part 11, and 30 is connected to the sensor 29. The circuit 30 converts the detection signal of the sensor 29 into an electrical signal and sends it to the MPU 77.
[0010]
Next, the operation of the flow meter according to the present invention will be described.
When fluid flows into the casing 4 from the inlet / outlet 2, the vortex plates 5, 5 a... Are swirled in the casing 4 to rotate the rotating body 6.
Then, the identification element of the detected part 27 that has passed through the transmission part 11 is detected by the sensor 29, and the flow rate is measured by the number of rotations thereof.
[0011]
【The invention's effect】
In short, in the present invention, the casing 4 provided with the outflow inlets 2 and 3 at the upper and lower portions, the plurality of vortex plates 5, 5 a provided in the casing 4, and the vortex plates 5, 5 a. The rotating body 6 is provided with a detected portion 27, and the casing 4 is provided with a transmitting portion 11 of an identification element of the detected portion 27, and is detected outside the transmitting portion 11. Since the sensor 29 for detecting the identification element of the portion 27 is provided, the rotator 6 is rotated by the eddy current generated between the rotator 6 and the casing 4, so that the space between them becomes wider, and even if the contents are deposited in the example The flow meter 1 can be operated more reliably without being sandwiched between the rotating body 6 and the casing 4, and a normal flow rate can be measured.
[0012]
Further, since the casing 4 is constituted by the casing body 7 provided with the inflow port 2 and the lower lid portion 8 provided with the outflow port 3, the casing 4 is inserted into the casing 4 of the cylindrical body 19 provided with vortex plates 5, 5a. The vortex plates 5, 5 a... Are formed on the inner peripheral surface of the cylindrical body 19 accommodated in the casing body 7, thereby preventing the casing body 7 from being complicated in shape and manufacturing cost. In addition, a lower receiving seat 13 of the rotating body 6 projects from the center of the upper surface of the lower lid 8 and is provided at the center of the upper portion of the cylinder 19 to fix the inner periphery of the vortex plates 5, 5a. The lower surface of the upper receiving seat 20 is a conical concave surface 23, and vanes 25, 25a are provided radially at the lower part of the pointed head 24 which is the upper part of the rotating body 6, and the lower parts of the vanes 25, 25a,. The bottom surface of the bottom portion 26 provided on the bottom is a conical concave surface 28, and the upper portion of the head 24 is in the conical concave surface 23 of the upper receiving seat 20, and the lower receiving seat 1 of the lower lid portion 8 Since 3 is positioned in the conical concave surface 28 of the rotating body 6, the rotating body 6 can be reliably rotated and accommodated in the casing 4.
Therefore, by assembling the above-described components, the flow meter 1 having a complicated internal shape can be easily manufactured at a low cost.
[Brief description of the drawings]
FIG. 1 is a front view of a flow meter according to the present invention.
2 is a cross-sectional view taken along the line EE of FIG. 1;
3 is a cross-sectional view taken along the line FF in FIG. 2. FIG.
FIG. 4 is a perspective view of a casing body.
5 is a cross-sectional view taken along the line GG in FIG. 4;
6 is a cross-sectional view taken along the line HH of FIG.
FIG. 7 is a perspective view of a lower lid part.
FIG. 8 is a perspective view of a vortex plate provided in a cylindrical body.
FIG. 9 is a perspective view of a rotating body.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Flowmeter 2 Inlet 3 Outlet 4 Casing 5, 5a ... Swirl plate 6 Rotating body 7 Casing body 8 Lower cover part
11 Transmission part
13 Lower seat
19 Tube
20 Upper seat
23 Conical concave surface
24 heads
25, 25a… slats
26 Bottom
27 Detected part
28 Conical concave surface
29 sensors

Claims (1)

A casing having an upper and lower outlets, a plurality of vortex plates provided in the casing, and a rotating body provided rotatably below the vortex plate, and a detected part is provided on the rotating body. In addition, in the flowmeter in which the casing is provided with a transmission part for the identification element of the detected part, and a sensor for detecting the identification element of the detected part is provided outside the transmission part ,
The casing is composed of a casing body provided with an inlet and a lower lid part provided with an outlet, and a vortex plate is formed on the inner peripheral surface of the cylinder housed in the casing body, and the upper surface of the lower lid part The lower receiving seat of the rotating body protrudes in the center, and the lower surface of the upper receiving seat that is provided in the upper center of the cylinder and fixes the inner periphery of the vortex plate is a conical concave surface, and the tip that is the upper portion of the rotating body A blade is provided radially at the bottom of the head, and the bottom of the bottom provided at the bottom of the blade is a conical concave surface. A flowmeter characterized in that the seat is located in the conical concave surface of the rotating body .

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