JP2603336Y2 - Fluidic flow meter - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid flow meter.

[0002]

2. Description of the Related Art In a housing of a fluidic flow meter, a casing having a flow path through which a gas to be measured passes, a fluidic element interposed in a flow path in the casing, and a fluidic element in the fluidic element. A pressure detector that detects an alternating pressure change of the gas generated in the display, and a display unit that displays a gas flow rate based on an output from the pressure detector,
A shut-off valve that shuts off the flow path when an abnormality such as an excessive flow rate or an earthquake occurs, and a hot-wire anemometer provided on the upstream side of the gas flow direction in the shut-off valve within the flow path; And a control circuit for signal processing each output from the hot wire anemometer, which are electrically connected by circuit wiring on a single circuit wiring board and a number of connection lines.

[0003]

In such prior art, the pressure detector, the display means, the shut-off valve, the hot-wire anemometer and the control circuit are connected to each other by a single internal circuit wiring board. The number of wirings that can be connected by a single circuit wiring board is limited, and the remaining connection terminals that cannot be connected by this circuit wiring board must be individually connected by flexible connection lines. In addition, there is a problem that connection work is complicated.

Accordingly, it is an object of the present invention to provide a fluidic flow meter which can electrically connect each connection terminal in a housing of the fluidic flow meter with a simple configuration.

[0005]

According to the present invention, a housing 2 is provided.
The display means 19 facing the front is provided in the upper part of the inside 6, and the gas inlet 3 and the gas outlet 23 are provided in the lower part of the housing 26.
The display means 1 is arranged laterally adjacent to the
Below 9 are arranged a shut-off valve 7 connected to the inlet 3 and a fluidic element 14 connected to the shut-off valve 7 driven by the electromagnetic solenoid 24 and guiding the gas to the outlet 23. An anemometer 25 is disposed between the flow sensor 25 and the shut-off valve 7.
The first pin 35 of the display means 19 and the second pin 36 of the pressure detector 18 are provided on the rear side of the housing 26.
, A third pin 37 of the electromagnetic solenoid 24,
The first pin 35 and the third pin 37 are connected by being inserted into pin holes 39 and 40 of the first circuit wiring board 31 on one vertical plane, and the second pin 36th and 4th
The pin 38 is located at a position different from the first circuit wiring board 31 in the thickness direction and is provided with a pin hole 4 of the second circuit wiring board 33 on another vertical plane provided at an interval vertically.
The wires at the upper and lower ends of the flexible cable 34, which are inserted through the cables 5 and 46 and extend vertically, are connected to the lower part of the first circuit wiring board 31 and the upper part of the second circuit wiring board 33. ,
It is a fluidic flow meter characterized by being connected respectively.

[0006]

According to the present invention, in the housing of the fluidic flow meter, the first and second circuit wiring boards 31 and 33 are arranged at different positions in the thickness direction and at an interval vertically.
Are respectively disposed, and a lower portion of the first circuit wiring board 31;
The upper part of the second circuit wiring board 33 is connected to the upper and lower ends of the element wires 34, respectively. The first pin 35 of the display means 19 and the third pin 37 of the electromagnetic solenoid 24 are inserted through and connected to the pin holes 39 and 40 of the first circuit wiring board 31. Pin holes 45 and 46 of second circuit wiring board 33
Is connected to the second pin 36 of the pressure detector 18 and the fourth pin 38 of the flowmeter 25. These first to first
The fourth pins 35 to 38 constitute connection terminals. Therefore, according to the present invention, it is not necessary to connect each connection terminal individually with a flexible connection wire as in the related art, so that the connection operation is simplified, and the degree of freedom in arrangement of each member in the housing is reduced. Be improved.

[0007]

FIG. 1 is a sectional view of a fluidic flow meter 1 according to an embodiment of the present invention as viewed from the front, and FIG. 2 is a sectional view of the fluidic flow meter 1 as viewed from the back. 3 is a sectional view of the fluidic flow meter 1 as viewed from the left side in FIG. The gas supplied from the inlet 3 into the flow path 5 in the casing 4 passes through two rectifiers 11 and 13 provided in the rectification space 10 through the valve hole 9 opened by the shut-off valve 7, and the fluidic element 14 are introduced into the nozzle hole 15 and two virtual lines 1
The flow path is alternately changed as indicated by reference numerals 6 and 17, and the alternating pressure change is detected by a pressure detector 18 realized by a piezoelectric film sensor or the like, and based on the detector, a display area of a display means 19 is displayed. At 20 the gas flow is digitally displayed.

After the gas flow rate is detected in this way,
Detection space 21 in which the fluidic element 14 is fitted.
The gas inside is led to gas consuming equipment via outlet 23.

The casing 4 has an electromagnetic solenoid 24 for closing the shut-off valve 7 when an abnormality occurs.
A hot-wire anemometer 2 is provided behind the inlet flow path 6.
5 are provided. The casing 4 provided with the electromagnetic solenoid 24 and the hot-wire anemometer 25 and the display means 19 are housed in a housing 26.

The housing 26 includes a housing body 2
7 and a back cover 28 fixed to the main body 27 with screws or the like, and a shielding plate 29 made of a flexible and resilient material such as rubber is provided between the main body 27 and the back cover 28.
Is interposed. In such a small space 30 between the shielding plate 29 and the casing 4 and the display means 19,
First and second circuit wiring boards 31 and 33 are provided at an interval in the vertical direction (up and down direction in FIG. 3).
1 and 33 are electrically connected by a flexible cable 34.

A first pin 35 as a plurality of connection terminals is provided on the back surface of the display means 19 (see FIG. 2).
The pressure detector 18 is provided with a plurality of second pins 36, and the electromagnetic solenoid 24 is provided with a plurality of third pins 37.
And a plurality of fourth pins 38 are provided on the hot-wire flowmeter 25.

FIG. 4 is a front view of the first and second circuit wiring boards 31, 33 connected by a cable 34.
FIG. 5 is a cross-sectional view taken along line VV of FIG. FIG. 5 is enlarged in the thickness direction (the left-right direction in FIG. 5) for ease of illustration. A plurality of pin holes 39 and 40 are formed on one surface of the first circuit wiring board 31, and the first and second pins 35 and 36 are inserted into these pin holes 39 and 40. The first pin 35 is connected to circuit wirings 41 and 43, and the second pin 36 is connected to circuit wiring 44.

The second circuit wiring board 33 has a pin hole 4
5, 46 are formed. The third pin 37 connected to the pin hole 45 is connected to the circuit wiring 47, and the third pin 37 is connected to the pin hole 46.
Is connected to a circuit wiring 48. These circuit wirings 47 and 48 are connected to the cable 34.
Are individually connected to the circuit wirings 41 and 43 of the first circuit wiring board 31 via the respective element wires.

Since the first circuit wiring board 31 and the second circuit wiring board 33 are connected by the flexible cable 34 in this manner, the first and second circuit wiring boards 31, 33 are connected to each other. The casing 4, the display means 19, the electromagnetic solenoid 24, and the casing 4 housed in the housing 26 can be arranged on different vertical planes in the space 30, that is, in the horizontal direction in FIG. The degree of freedom in arranging the components such as the hot wire flow meter 25 is ensured, and the wiring structure can be simplified.

In the above-described embodiment, the first and second circuit wiring boards 31 and 33 are arranged on two vertical planes which are located at different positions in the thickness direction and are vertically spaced from each other. The connection is made by a flexible cable 34. The wires at the upper and lower ends of the cable 34 are connected to the lower part of the first circuit wiring board 31 and the upper part of the second circuit wiring board 33, respectively.

[0016]

According to the present invention, the lower part of the first circuit wiring board 31 on each plane, which is provided in the housing at different positions in the thickness direction and spaced apart from each other vertically, and the second circuit wiring board The upper and lower ends of the flexible cable 34 are connected to the upper and lower ends of the flexible cable 34 at the upper and lower ends, respectively. The first pin 35 and the third pin 37 of the electromagnetic solenoid 24 are inserted through and connected to the pin holes 39 and 40, and the second circuit wiring board 33 has the second pin 36 of the pressure detector 18 and the current meter 25. And the fourth pin 38 is inserted through the pin holes 45 and 46 to be connected, so that the degree of freedom in arrangement of the display means 19, the pressure detector 18, the electromagnetic solenoid 24 and the flow velocity meter 25 in the housing 26 is ensured. , Simple wiring structure It can be of. Therefore, the operation of connecting the first to fourth pins 35 to 38, which are connection terminals at the time of manufacturing, can be simplified, and productivity is improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a fluid flow meter 1 according to an embodiment of the present invention as viewed from the front side.

FIG. 2 is a cross-sectional view of the fluidic flow meter 1 viewed from the back side.

FIG. 3 is a sectional view of the fluidic flow meter 1 viewed from the left side of FIG.

4 is a front view of first and second circuit wiring boards 31 and 33 connected by a cable 34. FIG.

FIG. 5 is a cross-sectional view taken along the line VV of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fluidic flow meter 4 Casing 5 Channel 14 Fluidic element 18 Pressure detector 19 Display means 24 Electromagnetic solenoid 25 Hot wire anemometer 26 Housing 30 Space 31 First circuit wiring board 33 Second circuit wiring board 34 Cable 35 1st pin 36 2nd pin 37 3rd pin 38 4th pin 41,43,44,47,48 Circuit wiring

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuichi Tomoda 4-7-31 Nishiiwata, Higashiosaka-shi, Osaka Inside Kansai Research Laboratory, Kinmon Manufacturing Co., Ltd. No. 7-31, Kanmon Manufacturing Co., Ltd. Kansai Research Laboratory (56) References JP-A-4-181122 (JP, A) JP-A-2-220377 (JP, A) JP-A-62-37998 (JP, A) Shokai 61-186189 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01F 3/22 G01F 1/20

Claims (1)

(57) [Scope of request for utility model registration] A display means (19) facing the front is provided in an upper part of the housing (26), and a gas inlet (3) and an outlet (23) are arranged laterally adjacent to each other in a lower part of the housing (26). Below the display means 19, a shut-off valve 7 connected to the inlet 3 and a fluidic element 14 connected to the shut-off valve 7 driven by the electromagnetic solenoid 24 and guiding the gas to the outlet 23 are arranged. A flow meter 25 is disposed between the valve 3 and the shut-off valve 7, a pressure detector 18 is disposed on the fluidic element 14, and a first pin 35 of the display means 19 is provided on the rear side of the housing 26. The second pin 36 of the detector 18, the third pin 37 of the electromagnetic solenoid 24, and the fourth pin 38 of the current meter 25
The first pin 35 and the third pin 37 are connected to a first
The second pin 36 and the fourth pin 38 are inserted into and connected to the pin holes 39 and 40 of the circuit wiring board 31.
1 is inserted through and connected to pin holes 45 and 46 of a second circuit wiring board 33 on another vertical plane which is located at a position different from the thickness direction and is provided at an interval in the vertical direction, and extends vertically. The wires at the upper and lower ends of the flexible cable 34 are connected to the lower part of the first circuit wiring board 31 and the upper part of the second circuit wiring board 33, respectively. Total.