JP4188710B2 - Pressure flow meter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The pressure flow meter according to the present invention relates to a pressure flow meter that simply displays a positive pressure or a negative pressure and a flow rate of a fluid.
[0002]
[Prior art]
Conventionally, a mechanical pressure gauge using a Bourdon tube, bellows, diaphragm, etc., a silicon diaphragm, a ceramic diaphragm, an electronic pressure gauge using a semiconductor strain gauge, etc., a differential pressure flow meter, a Pitot tube type Many flow meters such as a flow meter, an area flow meter, an electromagnetic flow meter, an ultrasonic flow meter, an impeller flow meter, and the like are provided.
[0003]
[Problems to be solved by the invention]
Mechanical pressure gauges are large in shape and vulnerable to shocks. Electronic pressure gauges can be downsized and output easily for control, but they are expensive in terms of price. There are also problems such as an increase in shape and cost. Therefore, it is an object to provide an inexpensive pressure flow meter that is compact, shock-resistant, has both a pressure gauge and a flow meter, can be connected with one touch, and does not limit the installation orientation in the vertical, vertical, and horizontal directions.
[0004]
[Means for Solving the Problems]
An outer cylindrical case tube having a fluid inlet and outlet at both ends, an inner cylindrical case tube positioned inside the outer cylindrical case tube, a pressure receiving plate fixed to the pressure receiving spring, a float fixed to the flow spring, the outer Ri Na from the tubular casing pipe or the outer cylindrical casing pipe and a discharge port formed in the inner cylinder casing tube, the pressure receiving plate fixed to the pressure receiving spring is disposed within the inner cylindrical case tube is secured to the flow spring The float is disposed between the outer cylinder case pipe and the inner cylinder case pipe, and a discharge port through which fluid is conducted is formed between the outside of the outer cylinder case pipe and the inside of the inner cylinder case pipe. It is a pressure flow meter that is compact, shock-resistant, has both a pressure meter and a flow meter, can be connected with one touch, and can provide an inexpensive pressure flow meter that does not limit the installation orientation in the vertical, vertical and horizontal directions.
[0005]
The pressure flow meter according to the present invention is fixed to an outer cylinder case tube 4 having a fluid inlet 2 and an outlet 1 at both ends, an inner cylinder case tube 3 positioned inside the outer cylinder case tube 4, and a pressure receiving spring 7. pressure receiving plate 6 is, float 16 is secured to the flow spring 17, Ri name from the discharge ports 5 formed in the outer cylindrical casing tube 4 or the outer cylindrical casing tube and the inner barrel housing tube, secured to the pressure receiving spring 7 The pressure receiving plate 6 is disposed inside the inner cylindrical case tube 3, the float 16 fixed to the flow spring 17 is disposed between the outer cylindrical case tube 4 and the inner cylindrical case tube 3, and the outer cylindrical case tube A discharge port 5 through which fluid is conducted is formed between the outside of 4 and the inside of the inner cylindrical case tube 3 .
[0006]
In the pressure flow meter according to the present invention, the pressure receiving plate 6 fixed to the pressure receiving spring 7 is disposed inside the inner cylindrical case tube 3, and the float 16 fixed to the flow spring 17 includes the outer cylindrical case tube 4 and the inner cylindrical case. A discharge port 5 is formed between the pipes 3 and between the outside of the outer cylinder case pipe 4 and the inside of the inner cylinder case pipe 3.
[0008]
The pressure flow meter according to the present invention includes a one-touch pipe connection mechanism at the fluid inlet and / or outlet of the outer case tube.
[0009]
The pressure flow meter according to the present invention will be described in more detail, but is not limited to the following description. The pressure flow meter is for a positive pressure or negative pressure fluid and can be used for a liquid or a gas, and particularly preferably for a gas. Further, in the figure showing one embodiment, it is modeled for explanation.
[0010]
The outer cylinder case tube 4 of the pressure flow meter is not particularly limited in shape, material, size, etc., but is preferably hollow and the inner surface is cylindrical in order to achieve a uniform flow of fluid, The outer size is preferably 50 mm or less, particularly preferably 30 mm or less, and a material capable of visually observing the pressure receiving plate 6 indicating the pressure display state and the float 16 indicating the flow rate display state is preferable, for example, made of glass, acrylic resin, etc. It is particularly preferable to use an acrylic resin that is strong in impact resistance. Further, the pressure value display mark 10 and the flow rate display mark 20 for displaying the pressure value and the flow rate value are preferably printed, painted, engraved, engraved, or the like on the inner surface or the outer surface of the outer case tube.
[0011]
The inner cylinder case tube 3 of the pressure flow meter is not particularly limited in shape, material, size, etc., but is arranged almost in the center of the outer cylinder case tube 4, and includes a fluid flow 11, a pressure receiving plate. In consideration of the movement of 6 and the movement of the float 16, a material that is hollow and has a circular column shape on both the inner surface and the outer surface and that allows the pressure receiving plate 6 or the float 16 to be visually observed from the outside is preferable, for example, made of glass, acrylic resin, etc. It is particularly preferably made of acrylic resin having good impact resistance.
[0012]
The pressure receiving plate 6 that displays the pressure value is fixed to the end of the pressure receiving spring 7. As in the embodiment shown in FIG. 1, the pressure receiving plate is disposed inside the inner cylindrical case tube, and the other end of the pressure receiving spring is fixed to the closed end surface of the inner cylindrical case tube. The inner surface and the outer peripheral portion of the pressure receiving plate maintain airtightness, and can slide and move smoothly due to a change in the fluid pressure 9. 2, the pressure receiving plate is disposed in the gap 12 between the outer cylindrical case tube and the inner cylindrical case tube, and the other end of the pressure receiving spring is closed with the gap 12 closed. The inner surface of the outer cylindrical case tube, the outer surface of the inner cylindrical case tube, and the pressure receiving plate are kept airtight and can be smoothly slid and moved by a change in the fluid pressure 9.
[0013]
The pressure receiving spring 7 is for the pressure receiving plate to move in proportion to the pressure value in balance with the pressure received by the pressure receiving plate. The pressure receiving spring 7 is a stretchable one having uniform stress and is not particularly limited. Spiral, rubber, resin, magnet, etc. may be used, and a spiral spring made of metal wire is particularly preferable in terms of stress uniformity and durability.
[0014]
The float 16 that displays the flow rate value is fixed to the end of the float spring 17. As in the embodiment shown in FIG. 1, the float is disposed between the outer cylinder case tube and the inner cylinder case tube, and the other end of the float spring is opened by the outer cylinder case tube and the inner cylinder case tube. It is fixed to the end face, and moves smoothly due to the change of the fluid flow 11 with almost no contact with the inner surface of the outer cylinder case tube and the outer surface of the inner cylinder case tube. In addition, as in the embodiment shown in FIG. 2, the float is disposed inside the inner cylindrical case tube, and the other end of the float spring is fixed to the open end surface of the inner cylindrical case tube. It moves smoothly by the change of the fluid flow 11 without contacting the inner surface of the cylindrical case tube.
[0015]
The float spring 17 is not particularly limited in material, shape, etc., but is preferably stretchable and expandable in proportion to the change in the flow rate of the fluid received by the float 16. In particular, a spiral spring made of a metal wire is preferable.
[0016]
The discharge port 5 formed in the pressure flow meter is a conduction path for balancing the pressure of the fluid confined on the pressure receiving plate 6 and the closed side with the pressure outside the external pressure flow meter. For example, the discharge port 5 includes a pressure receiving plate 6, a closed end surface of the inner cylindrical case tube, and a fluid confined in the inner cylindrical case tube 3 as shown in FIG. It conducts and penetrates the inner cylinder case tube and the outer cylinder case tube. Alternatively, the discharge port 5 is configured so that the fluid confined in the closed end face of the pressure receiving plate 6, the inner cylindrical case tube, the outer cylindrical case tube and the gap 12 as in the embodiment shown in FIG. It conducts to the outside. The confined fluid is always the same as the pressure of the external fluid, and the pressure received by the pressure receiving plate is displayed as a pressure value in balance with the pressure receiving spring.
[0017]
The pressure flow meter according to the present invention is provided with a one-touch pipe connection mechanism 8 at the fluid outlet 1 and the inlet 2 of the outer case tube so that the pipe can be connected with one touch. Insertion pipe connection is possible. Although it is possible to connect a supply pipe or a delivery pipe to either the inlet 2 or the outlet 1, it is preferable that a positive pressure fluid is connected to the inlet 2 and the delivery pipe is connected to the outlet 1. The negative pressure fluid is connected to a negative pressure (vacuum) supply pipe at the inlet (outlet) 2 and a negative pressure delivery pipe is connected to the outlet (inlet) 1.
[0018]
The pressure flow meter according to the present invention having such a structural arrangement is small, shock-resistant, has both a pressure gauge and a flow meter, can be connected with one touch, and does not limit the installation orientation in the vertical, vertical and horizontal directions, and is provided at low cost. The pressure value and the flow rate value of the fluid pressure 9 and the fluid flow 12 of the fluid of the positive pressure or the negative pressure can be displayed by the pressure receiving plate 6, the pressure display mark 10, the float 16 and the flow rate display mark 20.
[0019]
【Example】
An embodiment of a pressure flow meter according to the present invention will be described with reference to the drawings. The pressure flow meter according to the present invention is not limited to the examples.
[0020]
(Example 1) A hollow cylindrical outer cylinder case tube 4 having an outer diameter of 25 mm and an inner diameter of 23 mm made of acrylic resin, a 3 mm round hole is formed in the side surface of the outer cylinder case tube 4, and the outer surface of the outer cylinder case tube 4 is formed. The pressure value display mark 10 and the flow rate display mark 20 are engraved and formed by applying color paint. The hollow cylindrical inner cylinder case tube 3 having an outer diameter of 11 mm and an inner diameter of 10 mm made of acrylic resin, and the side surface of the inner cylinder case tube 3 A 3mm round hole is drilled in the hole (position that matches the round hole of the outer cylinder case tube), and a lid that closes the opening of the inner cylinder case tube 3 that is offset from the center is sealed. A pressure-receiving plate 6 that is bonded and sealed with an agent, is a disk shape made of aluminum and has an outer diameter of 10 mm, and that slides and moves smoothly without leaking fluid inside the inner case tube. .Spiral pressure sensor with 3mm metal wire The ring 7 is fixed by caulking, and the other end of the pressure receiving spring 7 is fixed to the inner side of the lid body in which the end of the inner cylinder case tube is bonded and sealed, and is a donut shape made of aluminum and having an outer diameter of 21 mm and an inner diameter of 13 mm. Float 16 that moves smoothly between the outer cylinder case tube and the inner cylinder case tube, and a spiral float spring 17 made of a metal wire with an outer diameter of 0.2 mm is caulked and fixed to the float 16 and is made of acrylic resin A discharge port 5 which is a perforated pipe having an outer diameter of 3 mm and an inner diameter of 1 mm, a one-touch piping connection mechanism 8 (detailed explanation is omitted, a normal product), and other parts (details are omitted) were prepared.
[0021]
The prepared parts are arranged and assembled as shown in FIG. 1, the other end of the float spring 17 is fixed between the outer case tube and the inner case tube, and the discharge port 5 is connected to the outer case case tube. A pressure flow meter having a length of about 60 mm was manufactured by inserting and fixing one-pipe connection at the outlet and the inlet.
[0022]
The pressure flow meter manufactured in this way is a compact, shock-proof device that shows the pressure value and flow rate value according to the position of the pressure receiving plate and float by balancing the pressure and flow rate of the fluid and the pressure receiving spring and float spring, respectively. Strong, one-touch connection is possible, and because of the balance by the spring, it is an inexpensive one that does not limit the vertical, horizontal and vertical orientations.
[0023]
(Embodiment 2) As shown in FIG. 2, the arrangement positions of the pressure receiving plate 6 and the float 16 are opposite to the inside and outside as compared with the embodiment 1, and the guide 13 is arranged at the center of the float 16 and the discharge port 5 Is formed only in the outer cylinder case tube 4, and the fluid pressure 11 is formed between the inner cylinder case tube and the fluid pressure 9 between the outer cylinder case tube and the inner cylinder case tube, and the others are substantially the same as in the first embodiment. A pressure flow meter was manufactured.
[0024]
The pressure flow meter manufactured in this way is a compact, shock-proof device that shows the pressure value and flow rate value according to the position of the pressure receiving plate and float by balancing the pressure and flow rate of the fluid and the pressure receiving spring and float spring, respectively. Strong, one-touch connection is possible, and it is inexpensive and does not limit the vertical, horizontal, and vertical orientations.
[0025]
【The invention's effect】
The pressure flow meter according to the present invention is a mechanism that displays the pressure (positive pressure, negative pressure) and flow value of a fluid at the same time, and displays the spring stress, the pressure value, and the flow value in a balanced manner. Because of its balance, it is small, shock-resistant, one-touch connection is possible, and it is inexpensive without limiting the vertical / horizontal orientation.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of a pressure flow meter according to the present invention. (B) The figure is a figure which shows the KK 'cross section of (a) figure, (b) The figure is a figure which shows the GG' cross section of (a) figure.
FIG. 2 is a diagram showing an embodiment of a pressure flow meter according to the present invention. (B) The figure is a figure which shows the JJ 'cross section of (a) figure, (b) The figure is a figure which shows the HH' cross section of (a) figure.
[Explanation of symbols]
1 Outlet (Inlet)
2 Inlet (outlet)
3 Inner cylinder case tube 4 Outer cylinder case tube 5 Discharge port 6 Pressure receiving plate 7 Pressure receiving spring 8 One-touch piping connection mechanism 9 Fluid pressure 10 Pressure value display mark 11 Fluid flow 12 Clearance 13 Guide 16 Float 17 Float spring 20 Flow rate display mark

Claims (2)

An outer cylindrical case tube having a fluid inlet and outlet at both ends, an inner cylindrical case tube positioned inside the outer cylindrical case tube, a pressure receiving plate fixed to the pressure receiving spring, a float fixed to the flow spring, the outer Ri Na from the tubular casing pipe or the outer cylindrical casing pipe and a discharge port formed in the inner cylinder casing tube, the pressure receiving plate fixed to the pressure receiving spring is disposed within the inner cylindrical case tube is secured to the flow spring The float is disposed between the outer cylinder case pipe and the inner cylinder case pipe, and a discharge port through which fluid is conducted is formed between the outside of the outer cylinder case pipe and the inside of the inner cylinder case pipe . Pressure flow meter. The pressure flow meter according to claim 1 , further comprising a one-touch pipe connection mechanism at a fluid inlet and / or outlet of the outer case tube.

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