JPH03210424A - Device for measuring flow rate - Google Patents

Abstract

PURPOSE:To simplify a structure by specifically attaching the upper end vicinity of a detecting body to a scaled transparent body integrally provided with a main body which can be freely mounted on and removed from a pipe. CONSTITUTION:An engaging member 8 is screwed into a threaded hole of a main body 7 of a flow rate measuring device 6 which is freely removably provided on a pipe 4, the lower end of a rod-like body 10 which deflects according to a fluid flow rate in the main body 7 is fixed to the member 8, and the vicinity of the upper end of the rod-like body 10 is housed in a scaled transparent body 12 integrally provided with the main body 7. Thus conventional impellers are unnecessary.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a flow meter that measures the flow rate of a fluid such as wet water flowing in a pipe.

[Conventional technology]

Conventionally, this type of flow meter measures the flow rate flowing through a pipe via an impeller. Figure 4 shows a conventional flow rate meter shown in Japanese Patent Application Laid-open No. 100327/1983. In the main part diagram, the flow rate of the fluid 1 is taken as the rotation of the impeller 2, and the rotation speed of the impeller 2 is detected from the change in inductance due to the passage of the magnetic body 3 provided on the impeller 2.
The corresponding flow rate is then measured.

In addition, as a conventional technology using one impeller, there is also the
A large number of techniques have been proposed, such as those described in Japanese Utility Model Application Publication No. 3-62722, Japanese Utility Model Application Publication No. 63-174022, and Japanese Utility Model Application Publication No. 63-63721.

[Problem to be solved by the invention]

As mentioned above, all conventional technologies that use impellers to measure the flow rate of fluid require a bearing mechanism to rotatably hold the impeller, resulting in a complex structure and increased manufacturing costs. It was easy to get high. Furthermore, depending on the distribution of the fluid force (flow force) applied to the impeller, the impeller does not necessarily rotate in accordance with the flow rate, and therefore there is a concern that sufficient flow rate measurement accuracy may not be obtained.

The present invention has been made in view of the actual situation in the prior art described above, and an object thereof is to provide a flow rate measuring device that can measure the flow rate of fluid flowing in a pipe without providing an impeller.

[Means to solve the problem]

In order to achieve this object, the present invention provides a flow meter that is attached to a pipe through which fluid is introduced and measures the flow rate of the fluid in the pipe. , a detection body whose lower end is fixed to the main body and whose upper end is movable and which bends and deforms according to the flow rate of fluid flowing through the main body; The structure includes a transparent body provided with a scale and a scale formed thereon.

[Effect]

The present invention is constructed as described above, and when there is no fluid flow within the main body, the detection body is fully extended, and the transparent body allows confirmation that the upper end of the detection body is at the uppermost position. When a fluid flow occurs inside the main body in this state, the detection object bends according to the flow rate, and since the lower end of the detection object is fixed, the position of the upper end is lowered, which can be confirmed using the transparent object. can. Considering this,
In advance, set the scale corresponding to the position of the upper end of the detection object when there is no flow of fluid in the main body as the reference position, and find the relationship between the flow rate of the fluid flowing inside the main body and the position of the upper end of the detection object. , a scale corresponding to the relationship is formed on the transparent body. Therefore, by looking at the scale that coincides with the upper end of the detection body, the flow rate can be measured without requiring any impeller.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a side sectional view showing an embodiment of the flow meter of the present invention, and FIG. 2 is a perspective view.

In FIGS. 1 and 2, 4 is a pipe through which the fluid to be measured is guided, and 6 is a flow meter. This flow meter 6 is
A main body 7 that can be detachably attached to, for example, screwed into, the piping 4, a lower end fixed to an engaging member 8 that is screwed into a screw hole formed in the main body 7, and an upper end movable, and an arrow flowing inside the main body 7. a detection body that causes deflection deformation according to the flow rate of the fluid, indicated by 9;
For example, if a flexible rod-shaped body 10 made of synthetic resin,
The rod-shaped body 10 is housed near the upper end thereof, is provided integrally with the main body 7, and includes a transparent body 12 having a scale 11 formed on its surface. The transparent body 121 is screwed into the screw hole formed in the main body 7 (1). In addition, near the upper end of the rod-shaped body 10, a support rod 13 that supports the force received from the rod-shaped body 10 force 1 fluid force 1 is distributed, and this support rod 13 is connected to the transparent body 12.
1).

In forming the scale 11 of the flow meter 6, the position of the upper end of the rod-shaped body 10 when there is no fluid in the main body 7 is set as a reference position, that is, a reference scale. Furthermore, when the flow rate of the fluid flowing inside the main body 7 is increased little by little, the rod-shaped body 10 is bent as shown by the two-dot chain line in FIG. The positional force of 1 decreases, but the rod-like body 10 at the corresponding flow rate decreases by 1.
A scale is formed at a position on the surface of the transparent body 12 corresponding to the upper end position of the transparent body 12 to clearly indicate the corresponding flow rate.

In this embodiment, both ends of the main body 7 of the flowmeter 1166 are screwed together between the pipe 4 and another pipe (not shown). When the fluid does not flow into the main body 7 in this state, no fluid force is applied to the rod-shaped body 10, and therefore the rod-shaped body 10 is in a state of being extended in the vertical direction, and its upper end is aligned with the reference scale of the transparent body 12. Match. When the fluid flows into the main body 7, the rod-shaped body 10 is bent as shown by the two-dot chain line in FIG. 1 according to the flow rate, and its upper end is lowered. Therefore, it is sufficient to read the scale that corresponds to the upper end of the rod-shaped body 10 when it is lowered, and that scale represents the flow rate of the fluid flowing inside the main body 7.

In this way, in this embodiment, the flow rate of the fluid can be measured without requiring any impeller, and therefore, the structure is simple without providing a bearing mechanism, etc., and the manufacturing cost is low. In addition, there is no concern that it may not operate satisfactorily depending on the distribution of fluid force, as is the case with impellers.

That is, in this embodiment, the rod-shaped body 10 is deflected and deformed in accordance with the fluid force, and therefore excellent measurement accuracy can be obtained.

Moreover, FIG. 3 shows a flowmeter 81 of the present invention! It is a side sectional view showing other examples of a container.

In FIG. 3, a filamentous body 14 is provided as a detection body,
The weight 15 provided at the lower end of this filament 14 is the engaging member 8.
A stopper 17 provided at the upper end of the filamentous body 14 is placed on a moving plate 18 having an insertion hole for the filamentous body 14, and below the movable plate 18,
Spring 1 that urges this moving plate 18 to be positioned upward
9 is provided.

Even in other embodiments configured in this way, the filament 14 is adjusted according to the flow rate of the fluid flowing inside the main body 7, that is, the fluid force.
is bent as shown by the two-dot chain line in FIG. Therefore, reading the scale on the transparent body 12 corresponding to the position of the moving plate 18 will give the corresponding flow rate. Note that when there is no fluid flow inside the main body 7, the force of the spring 19 moves the movable plate 1.
9 returns to the uppermost position, and the filament 1 is inserted through the stopper 17.
4 is pulled up and returns to the vertically extended state as shown in the figure.

The other embodiments constructed in this manner also do not require any impeller and have the same effects as the embodiments shown in FIGS. 1 and 2 described above.

In the above embodiment, the rod-like body 10 or the filament-like body 14 is provided as the detecting body, but the present invention is not limited to this, and a thin plate band-like body or the like may be provided.

〔Effect of the invention〕

Since the flow meter of the present invention is configured as described above,
The flow rate can be measured without any impeller, therefore, a bearing mechanism like the conventional one is not required, the structure is simpler than the conventional one, and the manufacturing cost can be reduced. Furthermore, excellent measurement accuracy can be obtained because there is little force transmission loss between the fluid and the detection object.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing one embodiment of the flow meter of the present invention, FIG. 2 is a perspective view of the embodiment shown in FIG. 1, and FIG. 3 is a side sectional view showing another embodiment of the present invention. 4 are principal part diagrams showing an example of a conventional flow rate measuring device. 4... Piping, 6... Flow meter, 7.
...Main body, 8...Engagement member, 10...
... Rod-shaped body (detection object), 11 ... Scale, 12
...Transparent body, 13... Support rod, 14.
... Thread-like body (detection object), 15 ... Weight, 16 ... Recess, 17 ... S1-flange, 18 ...
...Moving plate, 19... Spring. Figure 2

Claims (1)

[Claims] (1) A flow meter that is attached to a pipe through which fluid is guided and measures the flow rate of fluid in the pipe, has a main body that is detachable from the pipe, a main body that extends in the vertical direction, a lower end fixed to the main body, and an upper end. a detecting body which is movably provided and which bends and deforms in accordance with the flow rate of fluid flowing within the main body;
A flow rate measuring device comprising: a transparent body having a scale formed thereon;