JP3219131U - Gauge pressure detector and flume type flow meter, cough type flow meter and water level meter equipped with the same - Google Patents

Abstract

A gauge pressure detector that can be installed easily and at low cost, and a flume type flow meter, a cough type flow meter, and a water level meter provided with the same are provided. A gauge pressure detector (1) includes a gauge pressure sensor (3) provided in a main body (2) and a first pressure provided on one end side of the main body (2) in order to introduce a measurement object to one surface side of the gauge pressure sensor (3). A port 4, a second port 5 provided on the other end side of the main body 2 for introducing the atmosphere to the other surface side of the gauge pressure sensor 3, and a gauge pressure sensor 3 built in the main body 2 and detected by the gauge pressure sensor 3. And a recording unit 6 for recording the results. [Selection] Figure 1

Description

  The present invention relates to, for example, a gauge pressure detector for detecting and recording a gauge pressure, and a flume type flow meter, a cough type flow meter, and a water level meter provided with the same.

  Conventionally, as a pressure-type water level meter used to measure the flow rate of sewage, a sensor with a built-in sensor for measuring the sewage gauge pressure is connected to a tube and a communication cable to open the sensor to the atmosphere. It is known to connect a cable to the body of a water level meter that is placed on the ground.

  In such a measuring apparatus, for example, the gauge pressure can be confirmed on the ground by displaying the gauge pressure on the main body.

  However, in the pressure type water level meter, after installing the detector in the sewage, it takes time to install a relatively long tube and communication cable connected to the detector, and the number of members increases and the manufacturing cost increases. There is also a problem.

  The present invention has been made in consideration of the above-mentioned matters. The purpose of the present invention is to provide a gauge pressure detector that can be installed easily and at low cost, and a flume flow meter, a cough flow meter, and a water level equipped with the same. To provide a total.

  In order to achieve the above object, a gauge pressure detector according to the present invention includes a gauge pressure sensor provided in a main body, and one end of the main body to introduce a measurement object on one side of the gauge pressure sensor. A first port provided; a second port provided on the other end side of the main body for introducing air to the other side of the gauge pressure sensor; and a gauge built in the main body and provided by the gauge pressure sensor. And a recording unit for recording the pressure detection result (claim 1).

  In order to achieve the above object, a flume type flow meter according to the present invention includes a flume installed in a water channel, the first port located in the flume, and the second port located outside the flume. The gauge pressure detector according to claim 1 attached to the flume (claim 2).

  In order to achieve the above object, a cough type flow meter according to the present invention includes a cough installed in a water channel, and the first port is located in the water channel upstream of the cough of the water channel. The gauge pressure detector according to claim 1, which is installed so that the second port is located outside (claim 3).

  In order to achieve the above object, a water level meter according to the present invention includes a T-shaped joint portion having a vertical portion extending upward from the middle of a horizontally extending horizontal portion, and a water intake pipe inserted horizontally into the ground. And the gauge pressure detector according to claim 1, wherein the intake pipe and the gauge pressure detector communicate with each other through the horizontal portion, and the first port is located in the horizontal portion, The second port is configured to be located outside the horizontal portion (claim 4).

  A water level gauge according to the present invention comprises the gauge pressure detector according to claim 1 and a vent tube connected to the other end of the gauge pressure detector. It is comprised so that it may communicate with 2 ports (Claim 5).

  In the present invention, a gauge pressure detector that can be installed simply and at low cost, and a flume type flow meter, a cough type flow meter, and a water level meter provided with the same are obtained.

  That is, in the gauge pressure detector of the invention according to each claim of the present application and the flume type flow meter, the cough type flow meter, and the water level meter provided with the gauge pressure detector, when detecting and recording the gauge pressure to be measured, Since there is no need to connect a tube or communication cable for opening to the atmosphere, the entire installation can be performed easily and at low cost.

(A) And (B) is the front view and explanatory drawing which show schematically the structure of the gauge pressure detector which concerns on one embodiment of this invention. (A) is a photograph of an example of the flume type flow meter according to an embodiment of the present invention, and (B) is a photograph of the flume of the flume type flow meter. 4 is a photograph showing an installation example of the flume type flow meter. It is a perspective view showing roughly the composition of the cough type flow meter concerning one embodiment of the present invention. (A) And (B) is explanatory drawing which shows roughly the structure of the water level meter which concerns on one Embodiment of this invention used for the measurement of the groundwater level of the ground around a vertical hole, and a slope ground. (A) And (B) is explanatory drawing and the principal part enlarged view which show roughly the structure of the water level meter which concerns on one embodiment of this invention used for the water level measurement of a river.

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

  A gauge pressure detector 1 shown in FIGS. 1A and 1B includes a gauge pressure sensor (in this example, a pressure / temperature sensor) 3 provided in a main body (body cover) 2, and one side of the gauge pressure sensor 3. A first port 4 provided on one end side of the main body 2 for introducing a measurement object into the second and a second port provided on the other end side of the main body 2 for introducing the atmosphere to the other surface side of the gauge pressure sensor 3. A port 5 and a recording unit 6 that is built in the main body 2 and records the detection result of the gauge pressure by the gauge pressure sensor 3 are provided. The recording unit 6 includes a measurement circuit 6a and a memory 6b. Further, a battery (for example, a lithium battery) 7 is built in the main body 2, a connector 8 for taking out data stored in the memory 6 b is provided at the other end of the main body 2, and a connector that is detachable from the connector 8. A cap 9 and a tail cap 10 attached to the connector cap 9 are provided.

  In such a gauge pressure detector 1, if the measurement object (water) is introduced into the main body 2 from the first port 4 and the atmosphere is introduced into the main body 2 from the second port 5, the gauge pressure sensor 3 detects the gauge pressure of the measurement object. It is not necessary to install a device other than the gauge pressure detector 3 in order to detect and record the gauge pressure to be measured, and it is necessary to connect a tube or communication cable for opening to the atmosphere to the gauge pressure detector 1. Therefore, the entire installation can be performed easily and at low cost. As is apparent from the above, the gauge pressure detector 1 of this example can detect the gauge pressure of the measurement object introduced into the main body 2 from the first port 4 and records the detected value. It is configured as a data logger (recorder).

  The gauge pressure detector 1 of this example can be applied to various uses, and a flume type flow meter as an example thereof will be described below.

  A flume type flow meter (an example of a measuring device) 11 shown in FIGS. 2A and 3 includes a flume 12 installed in a water channel and a flume 12 for measuring a gauge pressure of a measurement object flowing in the flume 12. And a gauge pressure detector 1 to be mounted.

  This flume type flow meter 11 is provided with a restriction in a part of the flow path, and generates a critical flow while the flow transitions from a normal flow to a jet flow. It is a device to measure.

  The flume 12 is a type of venturi leaf, and is an egg-shaped flume that can be easily installed in the downstream direction from the inverted part of the public fence or the attachment pipe port (see FIG. 3A). Presents.

  The gauge pressure detector 1 has a mounting portion 13 provided on the flume 12 such that the first port 4 is located inside the flume 12 and the second port 5 serving as a vent (vent) is located outside the flume 2. Removably attached to. FIG. 2B shows the flume 12 in a state where the gauge pressure detector 1 is not attached to the attachment portion 13.

  In the flume type flow meter 11 configured as described above, the gauge pressure of the measurement object is measured in the gauge pressure detector 1 in which the measurement object (water) flowing through the flume 12 is introduced into the first port 4 and the atmosphere is introduced into the second port 5. Since the detected flow rate can be calculated on the basis of this gauge pressure, and there is no need to connect a tube or communication cable for opening to the atmosphere to the gauge pressure detector 1, the entire installation can be performed easily. In addition, maintenance or the like of the gauge pressure detector 1 alone can be easily performed.

  It should be noted that the present invention is not limited to the above-described embodiment, and can be variously modified and implemented without departing from the gist of the present invention. For example, the following modifications can be given.

  In the above embodiment, an example in which the flume 12 is an egg-shaped flume has been shown. However, the present invention is not limited to this, and the flume 12 may be a perma bolus flume, a partial flume, or the like. What is necessary is just to provide the mounting part 13 in a position.

  Further, the gauge pressure detector 1 of the present invention is applicable not only to the flume type flow meter 11 but also to the cough type flow meter 14 as shown in FIG. That is, the cough type flow meter 14 shown in FIG. 3 includes a cough 16 installed in the water channel 15 and a mounting portion 13 provided on the inner wall of the water channel 15. Although not shown in FIG. 4, the gauge pressure detector 1 is detachably attached to the attachment portion 13, and the gauge pressure detector 1 is located upstream of the cough 16 of the water passage 15. The first port 4 is positioned in the mounting portion 13 and is mounted on the mounting portion 13 so that the second port 5 is positioned outside the water channel 15 (a region where water flowing through the water channel 15 is not touched). In this cough type flow meter 14, the gauge pressure of the measurement object is detected in the gauge pressure detector 1 into which the measurement object (water) flowing through the water channel 15 from the first port 4 is introduced and the atmosphere is introduced from the second port 5. Based on this gauge pressure, the flow rate of the measurement target flowing through the water channel 15 can be calculated. The shape of the weir 16 is not limited to the square weir in the illustrated example, but may be a triangular weir.

  Furthermore, the gauge pressure detector 1 of the present invention can also be applied to a water level gauge 17 used as shown in FIG. That is, the water level gauge 17 shown in FIG. 5 (A) is used in a vertical hole H extending from the ground toward the ground, such as a manhole, and is a tube extending upward from the middle of the horizontally extending tubular horizontal portion 18. A T-shaped tubular joint portion (cheese) 20 having a vertical portion 19, a water intake pipe 21 horizontally inserted into the ground, and a gauge pressure detector 1, and a water intake pipe 21 and a gauge pressure detector The first port 4 is located inside the horizontal portion 18 and the second port 5 is located outside the horizontal portion 18. In this water level gauge 17, the ground water in the vertical ground G 1 around the vertical hole H is introduced into the main body 2 from the first port 4 through the intake pipe 21 and the horizontal portion 18, and the atmosphere is introduced from the second port 5. The gauge pressure detector 1 detects the groundwater gauge pressure in the vertical ground G1 around the vertical hole H, and the groundwater level in the vertical ground G1 can be calculated based on this gauge pressure.

  Further, according to the water level gauge 17, not only the groundwater level of the vertical ground G1 around the vertical hole H but also the groundwater level of the slope ground G2 constituting the slope, for example, as shown in FIG. Is also possible.

  5A and 5B, the water level visualizing pipe 22 is inserted into the upper opening of the vertical part 19 of the joint part 20, but the water level visualizing pipe 22 may be omitted. In this case, the vertical portion 19 may also be omitted, and the joint portion 20 may be configured by a tubular member including only the horizontal portion 18. Further, the joint portion 20 may be formed integrally with the intake pipe 21 regardless of the configuration (the portion corresponding to the joint portion 20 is provided in the intake pipe 21 and the gauge pressure detector is directly provided in the intake pipe 21. 1 may be connected).

  In addition, as shown in FIGS. 6A and 6B, the present invention can also be applied to a water level gauge 23 for measuring the water level of a river (small river) or a water channel. That is, the water level gauge 23 includes a gauge pressure detector 1 and a vent tube 24 having one end connected to the other end side of the gauge pressure detector 1, and the inside of the vent tube 24 communicates with the second port 5. It is configured as follows. In the example of FIG. 6B, an expansion portion 25 is provided at one end of the vent tube 24, and water is passed between the tip of the expansion portion 25 and the outer surface of the main body 2 of the gauge pressure detector 1. And the expanded portion 25 is configured not to block the second port 5. As shown in FIG. 6 (A), when this water level gauge 23 is used, the other end of the vent tube 24 is held by an appropriate holding member 26 so as not to be buried in the water flowing through the river or the irrigation channel. Good. In this water level gauge 23, the measurement target (water) flowing through the river or the irrigation canal is introduced into the main body 2 from the first port 4, and the atmospheric pressure is introduced from the second port 5. Can be detected, and the water level of the river or the canal can be calculated based on the gauge pressure. That is, in this water level gauge 23, it is necessary to maintain water tightness by appropriate means from the second port 5 to the vent tube 24 so that the atmosphere is introduced into the second port 5.

  Here, the vent tube 24 is not limited to a tube having flexibility, and may be formed of a pipe having no flexibility.

  Needless to say, the modifications described in this specification may be combined as appropriate.

DESCRIPTION OF SYMBOLS 1 Gauge pressure detector 2 Main body 3 Gauge pressure sensor 4 1st port 5 2nd port 6 Recording part 7 Battery 8 Connector 9 Connector cap 10 Tail cap 11 Flume type flow meter 12 Flume 13 Mounting part 14 Cough type flow meter 15 Waterway 16 Cough 17 Water level gauge 18 Horizontal part 19 Vertical part 20 Joint part 21 Water intake pipe 22 Water level visualizing pipe 23 Water level gauge 24 Vent tube 25 Expanding part 26 Holding member G1 Vertical ground G2 Slope ground H Vertical hole

Claims (5)

A gauge pressure sensor provided in the body,
A first port provided on one end side of the main body to introduce a measurement object on one side of the gauge pressure sensor;
A second port provided on the other end of the main body for introducing air to the other side of the gauge pressure sensor;
A gauge pressure detector comprising a recording unit built in the main body and recording a detection result of the gauge pressure by the gauge pressure sensor.   A gauge pressure detector according to claim 1, wherein the gauge is mounted on the flume so that the first port is located inside the flume and the second port is located outside the flume. Flume flow meter equipped.   The cough installed in a waterway, and the upstream of the cough of the waterway, the first port is located in the waterway, and the second port is located outside the waterway. Cage type flow meter equipped with a gauge pressure detector. A T-shaped joint portion having a vertical portion extending upward from the middle of the horizontal portion extending horizontally;
An intake pipe that is inserted horizontally into the ground,
A gauge pressure detector according to claim 1;
The water intake pipe and the gauge pressure detector communicate with each other via the horizontal portion, and the water level meter is configured such that the first port is located in the horizontal portion and the second port is located outside the horizontal portion. . The gauge pressure detector according to claim 1, and a vent tube connected to the other end side of the gauge pressure detector,
A water level meter configured to communicate with the second port in the vent tube.