JP3346757B2 - Turbine flow meter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a turbine flow meter,
In particular, the present invention relates to a turbine flow meter capable of detecting a flow direction of a fluid as well as a flow direction of the fluid.

[0002]

2. Description of the Related Art A turbine flow meter is a flow meter utilizing the fact that the rotation speed of an impeller installed in a fluid flow path is proportional to the flow velocity of the fluid flowing therethrough. The flow rate of the fluid in proportion thereto is measured by detecting a change in the magnetic field intensity generated when each blade made of a magnetic material crosses the magnetic field by using a pickup coil.
That is, a signal that periodically changes with a peak at the time when the blade comes closest to the pickup coil is obtained from the pickup coil, and the number of peaks per unit time is counted by the detection device from the detection signal, so that the rotation of the impeller is The number and the flow rate of the fluid can be obtained.

[0003]

For example, in a configuration in which the introduction of a fluid into a storage tank and the derivation of a fluid from the storage tank are performed by a common pipe, a turbine flow meter provided in the common pipe is not only a flow rate but also a flow rate. It is necessary to be able to detect the direction of fluid flow. Generally, a turbine flow meter is designed to only detect the flow velocity and flow rate of a fluid from the rotation speed of an impeller, but cannot detect the direction of the fluid flow.A special structure is required to detect the flow direction It is. The present invention has been made in view of the above point, and an object of the present invention is to provide a turbine flowmeter which has a simple structure and can detect the flow direction of a fluid and the direction of the flow.

[0004]

According to the present invention, an impeller of a turbine flow meter is mounted on a support shaft.
To move back and forth along the
By configuring a pickup coil that can detect each blade
In addition, an impeller detection device is configured at both ends of the advance / retreat range of the impeller.
And the flow rate of the fluid is measured by the pickup coil.
And the position of the impeller detected by the impeller detection device.
Proposes a turbine flow meter that detects the direction of flow by using
You.

[0008] In the above configuration, the impeller detecting device includes:
Touch sensor or proximity sensor can be applied
You.

According to the present invention, a pickup coil is provided.
The flow rate of the fluid can be measured by the signal from the
Inspection of the impeller on the side where the impeller has moved according to the direction of body flow
The direction of the fluid flow is detected by the signal from the discharge device
be able to.

[0010]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 and FIG.
1 is a cross-sectional view illustrating an embodiment of a flow meter. Symbol 1 is flow
The housing 1 of the meter
Providing flanges 2a and 2b for connecting to a fluid conduit
ing. Reference numerals 3a and 3b denote front and rear supports 4a and 4b.
The front and rear stators supported by each
A support shaft 5 is provided between the rotors 3a and 3b.
Is supported by the slider 13 fitted on the support shaft 5.
Can rotate around axis 5 and move back and forth along support axis 5
It is configured to be possible. At least the impeller 8 of the impeller 7
It is made of magnetic material such as metal, and each blade 8
To detect the change in magnetic field strength that occurs when turning
The cup coil 9 is provided on the housing 1. pick
The up coil 9 is connected to a detection device 11 via a preamplifier 10.
Connected to The pickup coil 9 is configured to be able to detect each of the blades 8 in the range of movement of the impeller 7.
Further, impeller detection devices 14a and 14b are provided at both ends of the advance / retreat range of the impeller 7, and these are detection devices 1
Connected to 1. The impeller detection devices 14a, 14b
Can be configured by, for example, a contact sensor or a proximity sensor.

In the above configuration, when the fluid flows rightward as shown by the solid arrow in FIG.
Is pushed by the flow and moves to the right, and the impeller detecting device 14b
It rotates according to the flow rate in a state of contact with the. Conversely, when the fluid is flowing leftward as shown by the solid arrow in FIG. 2, the impeller 7 is pushed by the flow and moves to the left, and the flow rate is in a state where the impeller 7 is in contact with the impeller detection device 14a. Rotate according to.
Therefore, the detection device 11 can measure the flow rate of the fluid based on the signal from the pickup coil 9 and detect the direction of the flow based on the signals from the impeller detection devices 14a and 14b. In the above configuration, the contact portion between the impeller detection devices 14a, 14b and the impeller 7 is configured as a smooth surface so that the impeller detection devices 14a, 14b do not hinder the rotation of the impeller 7, Bearings etc. shall be interposed.

[0012]

As described above, the present invention has a simple structure,
A turbine flowmeter capable of detecting the flow direction of a fluid as well as the flow direction can be provided.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a turbine flow meter to which the present invention is applied .
It is sectional drawing which shows a state.

FIG. 2 shows an embodiment of a turbine flow meter to which the present invention is applied .
The state is a sectional view showing an operating state that is different from that of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Flange 3a, 3b Stator 4a, 4b Support 5 Support shaft 7 Impeller 8 Blade 9 Pickup coil 10 Preamplifier 11 Detector 13 Slider 14a, 14b Impeller detector

Claims (2)

(57) [Claims] An impeller of a turbine flow meter is arranged along a support shaft.
The blades can be moved forward and backward.
Constitute a pickup coil that can detect
Impeller detection devices are configured at both ends of the reciprocation range of the
When the flow rate of fluid is measured by the pickup coil,
The position of the impeller detected by the impeller detection device
Turbine flowmeter for detecting the direction of flow 2. An impeller detecting device includes a contact sensor or a near
2. The method according to claim 1, wherein the sensor comprises a contact sensor.
The described turbine flow meter