JP3232482B2 - Kalman vortex sensor-Manifold holder for capsule- - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manifold holder for a Karman vortex sensor capsule, and more particularly to a manifold holder for a Karman vortex sensor capsule having improved workability of various Karman vortex sensors.

[0002]

2. Description of the Related Art As is well known, a Karman vortex sensor is
It is used to measure fluids from a small flow rate to a large flow rate. The inner diameter of the vortex detector (consisting of a pole and a vibration detector) is formed in proportion to the flow rate to be measured. Is formed.

In particular, in the case of a small diameter, the pipe resistance increases and the waveform changes when the flow rate is very small, so that a stable vibration frequency cannot be detected, so that the measurement range of the flow rate is limited and the overall flow rate is reduced. Had a problem that was not obtained.

[0004] On the other hand, these various Karman vortex sensors have conventionally been used as being integrally incorporated in a manifold holder.

[0005]

SUMMARY OF THE INVENTION
Many of the above Karman vortex sensors are integrated into the manifold holder according to the purpose of use, and are integrated.However, if the operating conditions are changed or the flow rate is significantly changed and exceeds the measurement range, In this case, the measurement accuracy is reduced, so that the Karman vortex sensor must be replaced.

However, since the conventional manifold holder has a structure in which various Karman vortex sensors are integrally incorporated, even if a specific Karman vortex sensor is replaced, the entire manifold holder must be replaced. In the case where n dedicated Karman vortex sensors are attached to each flow path of the manifold holder, the entire manifold holder is n
Therefore, there has been a demand for an improvement in the detachability of the Karman vortex sensor.

Accordingly, an object of the present invention is to provide a manifold holder for a Karman vortex-type sensor capsule in which various Karman vortex-type sensor capsules can be accurately positioned in a housing space of the manifold holder and can be easily detached. It is in.

[0008]

In order to achieve the above object, the present invention has the following technical means. That is, this will be described using reference numerals in the accompanying drawings corresponding to the embodiments of the present invention.
The holder 2 is formed with an outlet 5 and an inlet 4 each of which is provided, and a storage space 7 is formed in a part of a flow path communicating the outlet 5 and the inlet 4, and a liquid is provided in the storage space 7. And an elongated Karman vortex sensor capsule 10 which is closely housed. The manifolds 1 are formed by assembling the holders 2 in series in a state where the holders 2 are arranged side by side. Are a plurality of Karman vortex sensor capsules 10 having different internal structures.
The housing space 7 is provided with a mounting port 9 through which the Karman vortex sensor capsule 10 can be inserted into the outlet 5 or the inlet 4. Each of the Karman vortex-type sensor capsules 10 is inserted into the accommodation space 7 and has a cross-sectional shape that can be positioned at a predetermined position when the Karman vortex sensor capsule 10 is inserted. Vortex sensor capsule 1
Reference numeral 0 denotes a manifold holder for the Karman vortex sensor capsule, which is detachably held by the pipe connection member 3 mounted on the outlet 5 or the inlet 4. According to the above, if the use conditions of the Karman vortex sensor capsule 10 are changed, or if the flow rate is significantly changed and exceeds the initially set measurement range,
By removing the pipe connection member 3, the corresponding Karman vortex sensor capsule 10 is taken out from the predetermined flow path of the manifold holder 1. Next, when the Karman vortex sensor capsule 10 suitable for use conditions is accommodated in the accommodation space 7 from the mounting port 9, the Karman vortex sensor capsule 10 has the outer shape of the Karman vortex sensor capsule 10 in the accommodation space 7. It is positioned by the fitting portion inside and is held by the pipe connection member 3. Therefore, when the use conditions of the various Karman vortex sensor capsules 10 are changed, or when the flow rate is significantly changed and exceeds the initially set measurement range, the corresponding Karman vortex sensor capsule 1 is not used.
0 can be easily attached to and detached from the manifold holder 1, and the various Karman vortex-type sensor capsules 10 can be accurately positioned and housed even when housed in the housing space 7.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described in detail with reference to the accompanying drawings and FIGS. FIG. 1 shows an embodiment of the present invention. 1A is a plan view of a manifold holder containing various Karman vortex sensor capsules, FIG. 1B is a side view of a manifold holder containing various Karman vortex sensor capsules, and FIG. 2 is a Karman vortex sensor FIG. 3 is an external perspective view of a capsule, and FIG.
FIG. 1A is a cross-sectional view taken along the line AA of FIG. 1A showing a state in which a Karman vortex sensor capsule as a first embodiment of the present invention is housed in a manifold holder.

First, the manifold holder of the present invention will be described. This manifold holder is shown as 1. This manifold holder 1 is composed of a combination of a plurality of holders 2 described later,
As shown in FIG. 3, the holder 2 has a housing space 7 formed in a part of a flow path that communicates the outlet 5 and the inlet 4 formed on one or the other.

The one inlet 4 is provided with a Karman vortex sensor capsule 10 described later as a first embodiment of the present invention.
Is formed, through which a pipe connection member 3 with a flange is mounted.

By connecting and fixing the holders 2 configured as described above with four connecting bolts 8 in a state of being arranged side by side in parallel, the manifold holders 1 assembled in a series are formed, and the outlets of the holders 2 are formed. 5 is sealed with blind plug 6,
These blind plugs 6 are formed with communication passages 5a communicating laterally, and these communication passages 5a communicate with outlets 5b formed at both ends of the manifold holder 1.

More specifically, the Karman vortex sensor capsule 10 is formed, for example, in a cylindrical shape having an outer diameter of D1 and O-ring grooves 12a and 12b formed on the outer periphery of both ends, and a straight tube having an inner diameter d inside. Are formed.

A pole 14 for generating Karman vortices is disposed on the upstream side of the flow path 13 so as to cross the flow path 13, and a beat plate 15 for detecting the frequency of Karman vortices is provided on the downstream side of the pole 14. Are arranged.

The Karman vortex sensor capsule 10
Is formed as an inner diameter D2 into which the outer diameter D1 of the Karman vortex sensor capsule 10 can fit without play, and the outflow side end of the accommodation space 7 has a Karman vortex sensor capsule. The end 16 of the blind plug 6 is provided with an abutting portion 17 for abutting the end 16 of the 10 and positioning in the longitudinal direction.

The inflow-side end of the Karman vortex sensor capsule 10 housed in the housing space 7 is pressed and held by the end of the flanged pipe connection member 3, and the outer periphery of the Karman vortex sensor capsule 10 is set bolt 18. Is pressed and held from the outside so that it cannot rotate. Although the cross-sectional shape of the Karman vortex sensor capsule 10 and the cross-sectional shape of the housing space 7 for housing the Karman vortex sensor capsule 10 have been described as being formed in a circular cross section, the present invention is not limited to this.

In the flow rate measurement by the Karman vortex sensor capsule 10 configured as described above, a Karman vortex is generated by a pole 14 in a fluid flowing in a flow path 13 at a predetermined flow rate, and the frequency is measured by a beat plate 15. The flow rate is measured by a well-known means that converts the flow rate into a flow rate by detecting and performing an arithmetic processing by a computer.

Next, a Karman vortex sensor capsule described later as a second embodiment of the present invention will be described. FIG. 4 is a cross-sectional view showing a state in which a Karman vortex sensor capsule as a second embodiment of the present invention is housed in a manifold holder. FIG. 5 shows a Karman vortex sensor capsule having a different flow path diameter as a second embodiment. It is sectional drawing which shows the state accommodated in the manifold holder. Note that the same components as those described in the above embodiment are denoted by the same reference numerals, and detailed description is omitted.

The Karman vortex sensor capsule according to the present embodiment is indicated by reference numerals 20 and 22. These Karman vortex type sensor capsules 20 and 22 are different from the above-described embodiment in that they are configured in a Venturi type in which both ends of an internal flow path are tapered.

That is, a flow path having a small inner diameter d2 is formed inside the Karman vortex sensor capsule 20 shown in FIG. 4, and an expanded flow path having an inner diameter d1 tapered at both ends thereof. 19a and 19b are formed.

A flow path having an inside diameter d3 slightly larger than the flow path of the Karman vortex sensor capsule 20 is formed inside the Karman vortex sensor capsule 22 shown in FIG. Are formed with enlarged diameter channels 19a and 19b having an inner diameter d1 which is enlarged in a tapered shape.

In the Karman vortex sensor capsule 10 of the present embodiment, the venturi method in which the flow paths 23 and 24 of the measuring section are formed to have a small diameter and both ends thereof are tapered is adopted. As a result, the inflow port on the front side of the pole 14 is tapered from a large diameter to a small diameter, so that the flow velocity is increased and a Karman vortex is easily generated, and at the same time, a required flow rate can be secured.

The inner diameters d2, d2 of the small-diameter flow paths 23, 24 after the fluid has passed through the pole 14 and the beat plate 15
Since d3 is tapered in the flow path with the large diameter d1, the entire flow rate is increased, and a stable flow rate can be secured.

As described above, the various Karman vortex sensor capsules 10, 20, and 22 described in each of the above-described embodiments.
Has a structure in which the internal flow path is different from that of the straight pipe type or the Venturi type, however, the cross-sectional diameter D1 and the length L are all the same in a cylindrical shape, and the accommodation space is 7 is also formed as an inner diameter D2 into which the outer diameter D1 of the Karman vortex sensor capsule 10 can fit without play, and is positioned in the longitudinal direction by abutting against the abutting portion 17 formed by the end of the blind plug 6. If necessary, the capsule can be easily replaced with a desired Karman vortex sensor capsule, and the range of flow measurement can be easily changed.

[0025]

The present invention has the following effects.

According to the first aspect of the present invention, as described in detail above, the outer shape and the length of the cross section of various Karman vortex sensor capsules are formed in a constant shape that can be accommodated in the accommodation space, so that the internal shape is improved. A Karman vortex sensor capsule having a different structure can be easily attached to and detached from the manifold holder, and various Karman vortex sensor capsules can be accurately positioned and housed even when housed in the housing space.

[Brief description of the drawings]

1A is a plan view of a manifold holder accommodating various Karman vortex sensor capsules, and FIG. 1B is a side view of a manifold holder accommodating various Karman vortex sensor capsules.

FIG. 2 is an external perspective view of a Karman vortex sensor capsule.

FIG. 3 is a cross-sectional view taken along the line AA of FIG. 1A showing a state in which the Karman vortex sensor capsule as the first embodiment of the present invention is housed in a manifold holder.

FIG. 4 is a cross-sectional view showing a state in which a Karman vortex sensor capsule according to a second embodiment of the present invention is accommodated in a manifold holder.

FIG. 5 is a sectional view showing a state in which Karman vortex sensor capsules having different flow path diameters are accommodated in a manifold holder as a second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Manifold holder 2 Holder 3 Pipe connection member 4 Inflow port 5 Outflow port 5b Outflow port 5a Communication path 6 Blind plug 7 Housing space 8 Connecting bolt 9 Mounting port 10 Karman vortex sensor capsule 12a, 12b ring groove 13 Flow path 14 Pole 15 Beat plate 16 End part 17 Contact part 18 Set bolt 19a, 19b Large diameter flow path 20 Karman vortex type sensor capsule 22 Karman vortex type sensor capsule 23, 24 Small diameter flow path

Claims (1)

(57) [Claims] An outlet 5 and an inlet 4 to which the pipe connection member 3 is attached are formed on one or the other, respectively, and a housing space 7 is formed in a part of a flow path communicating the outlet 5 and the inlet 4. The formed holder 2 and an elongated Karman vortex sensor capsule 10 which is liquid-tightly accommodated in the accommodation space 7.
The above-mentioned Karman vortex-type sensor capsules 10 having a different internal structure are composed of a plurality of the holders 2 arranged side by side in a row and arranged in series to form a manifold holder 1. The housing space 7 is provided with a mounting port 9 through which the Karman vortex sensor capsule 10 can be inserted into the outlet 5 or the inlet 4. Have
A fitting portion having a cross-sectional shape that can be positioned at a predetermined position when the above-mentioned Karman vortex sensor capsules 10 are inserted into the accommodation space 7 is formed, and each Karman vortex sensor inserted from the mounting port 9 is formed. A manifold for a Karman vortex sensor capsule, wherein the capsule 10 is detachably held by the pipe connection member 3 mounted on the outlet 5 or the inlet 4.