JPS5816126B2 - Uzuri yuriyoukei - Google Patents

Description

[Detailed description of the invention] The present invention relates to a vortex flowmeter with an excellent vortex detection function.

The object of the present invention is to provide a vortex generator having a desired cross-sectional configuration with a bent structure in which a vortex plate body supported by an axis parallel to the axis extends over the side surface of the vortex generator. The object of the present invention is to provide a vortex flow meter with an improved vortex detection mechanism.

Another object of the present invention is that the movable plate having the bending structure has not only a continuous arc-shaped bending structure but also a bending structure.
An object of the present invention is to provide a vortex flow meter that can be used for any shape including a discontinuous bending structure such as a bend.

Furthermore, another object of the present invention is that the movable plate body can be attached to the surface of the vortex generator by protruding from it, or it can be attached to the inside of the vortex generator by boring it in a recessed state to achieve the vortex generation function. Another object of the present invention is to provide a vortex flowmeter that does not impair the vortex detection function.

Furthermore, another object of the present invention is that the openings on both sides of the gap for detecting the vortex can be formed by arranging the movable plate member having a bending structure to face both sides of the vortex generator. To provide a vortex flow meter which can be opened on both sides and can effectively detect vortices.

Embodiments of the present invention will be described below with reference to the drawings.

In each figure, a represents a vortex generator having a desired cross-sectional shape, and is fixed upright within the tube 1 to constitute the vortex flowmeter A.

b is a movable plate with a bent structure that is movably supported by a desired bearing means C parallel to the axis of the vortex generator a, and its both side ends 1b, 1b extend over both sides of the vortex generator a to generate a vortex. Openings d, , d2 on both sides formed between the vortex generator a and the vortex generator a open from the sides of the vortex generator a to the rear.

e is a shielding plate arranged along the bearing C as necessary to prevent the movable plate from accidentally jumping out; G is a shielding plate formed between the movable plate a and the vortex generator a; This is a necessary void.

First, in the embodiment shown in FIG. 1, the movable plate has a Toyo shape with an arcuate cross section, and a desired gap G is formed on the upstream or downstream side of the flow of the vortex generator a, which also has an arcuate cross section. The vortex generator a is supported by a bearing mechanism C parallel to the axis of the vortex generator a.

In this case, it goes without saying that the arc-shaped movable plate may or may not be accommodated in the recess of the vortex generator a as shown in the figure.

In this embodiment, as the vortex is generated, the opening d1 of the gap G is relatively close to the vortex. Since d2 is open on both sides of the vortex generator a, changes in pressure due to the vortex are sensitive to the opening d1.
Or, it is transmitted to the fluid in the gap G from d2, and the fluid tends to flow toward the vortex generation side.

On the other hand, since the outer ends 1b, 1b of the movable plate body straddle both sides of the vortex generator a, the movable plate body itself is attracted by the vortex generation in the direction in which the vortex is generated, and its axis C is used as a fulcrum. He was forced to make a rotation.

Therefore, vortices are generated alternately on both sides of the vortex generation side a on the downstream side of the flow, so each time a vortex is generated, the movable plate moves left and right around axis C. The flow velocity or flow rate of the fluid can be measured by alternately movably displacing and detecting the displacement.

Next, in the embodiment shown in FIG. 2 and FIG.
b and 1b are provided and attached to the vortex generator a with a gap G maintained therebetween.

In addition, even in this case, a concave portion 4 that follows the shape of the movable plate of the mold may be bored in the vortex generator a, and the movable plate may be made to work within the concave portion 4. For example, the concave portion 4 may be formed in front or behind the vortex generator a.

In addition, in this way, when the movable plate body has a structure in which both ends 1b, 1b hold the vortex generating body a over a wide area, including both sides of the vortex generating body a, within the straddling range of the both ends 1b, 1b. both ends 1b,
It may be configured such that a bypass hole 2 communicating with 1b is bored to effectively and quickly move the fluid within the gap G, and furthermore, concave portions 4 are arranged side by side to activate the above-mentioned movable plate body. Good G).

(Refer to Fig. 5 above) In this embodiment, since the openings d1 and d2 on both sides face both sides of the vortex generating body a, the left and right sides of the movable plate body due to vortex generation are The dynamic displacement is performed more effectively and reliably than in the previous embodiment, and its operation is the same as that described above, so a description thereof will be omitted.

As mentioned above, many embodiments of the present invention have been described, but in particular, the cross-sectional shape of the movable plate body is not limited to that shown in the drawings.
Including various deformed bending configurations, the point is that the bending deformation allows the openings on both sides of the movable plate to open in areas reaching both sides of the vortex generating body, and the vortex is generated by collaborating with the configuration of both side plates of the movable plate. The purpose of this invention is to make the movable displacement of the movable plate body extremely sharp.

Also, depending on the means of the bearing C, the movable plate may be made of a non-flexible material, or may be made of a thin flexible material. This is satisfied by being able to perform all kinds of physical displacement movements such as left and right rotation, bending, and flexible deformation around the center.

Of course, in this case, rotation, twisting, and even flexible deformation of the shaft of the bearing C itself are included.

Further, in the description of the operation of this embodiment, only one direction of fluid flow has been described, but it goes without saying that the same operation can be achieved even when the fluid flows in the opposite direction.

Next, the detection mechanism f according to the present invention will be explained.

; The detection mechanism f shown in each figure is a part of the movable plate (including its bearing C, but if possible, the outer end where the movable amplitude is largest is sometimes preferable).

), and a fixed detection element f2 is arranged at a position separated from the movable detection element f1, for example, inside the vortex generator a and facing the movable detection element f1. The detection mechanism f consisting of the pair of elements f, f, f2 is not limited to any particular configuration.

For example, when the movable detection element f1 is attached to the vortex generator a as a permanent magnet, the fixed detection element f2 can be incorporated as an electromagnetic pickup to provide electromagnetic detection means.

In addition, since the movable plate body reciprocates in the left and right directions around the bearing means C, the rain detection elements f, , f2 can be provided with an electrostatic structure.
Not only can it be detected as a change in capacitance based on the change in contact and separation of the movable plate body, but also the movable detection element f,
By installing a light receiving mechanism as a fixed detection element f2 at a desired location on the outer periphery of the vortex generator a or inside the pipe to which the vortex generator a is attached, the reflected light from the light source can be detected by optical means. The fixed detection element f2 can be freely installed anywhere desired inside or on the outer periphery of the vortex generator a depending on the detection means.

In the present invention, even if the -L side of the movable plate body 3 is bent as shown in the figure to form the bent part 3, a gap G is provided to allow the vortex generating body a to enter and exit within the housing part 4. There is no problem even if the above-mentioned movable detection element f1 is fixed to a part of this bending part 3.

In the present invention, the movable plate that detects the generation of a vortex and moves as shown in the diagonal has a continuous or discontinuous bending structure, and is attached so as to straddle both sides of the vortex generator. Both sides of the movable plate and the opening of the gap are exposed to positions extremely close to where the vortex is generated. Therefore, the displacement of the movable plate can be detected extremely sensitively, and a high-frequency dust vortex meter can be provided, as well as a detection mechanism. Since it can be easily attached, it can be assembled easily and mass productivity can be improved.

[Brief explanation of drawings]

1 to 3 are perspective views and sectional views of essential parts showing numerous embodiments of the vortex flowmeter according to the present invention, FIG. 4 is an explanatory diagram of the overall configuration, and FIG. FIG. a... Vortex generating body that constitutes the vortex flowmeter A, b...
. . . A movable plate body with a bent structure, d, , , d2, whose both side ends 1b, 1b are formed astride both sides of the vortex generator a.
...Both ends 1b, 1b of the movable plate body and the vortex generator a
Openings on both sides formed between G... air gap.

Claims (1)

[Claims] 1. A movable plate with a desired bending structure extending from the center to both sides of the vortex generator is attached to the front or rear surface of the vortex generator standing upright in the conduit, with a gap between the movable plate and the axis of the vortex generator. The movable plate is mounted by a desired parallel bearing means so as to be able to reciprocate left and right in response to vortex detection, and a set of detection mechanisms is provided between the movable plate and a desired location separated from or apart from the movable plate. The vortex flowmeter is configured such that the vortex flowmeter is installed so as to be able to detect the left and right movable movement of the movable plate body by vortex detection.