JP2500202B2 - Water flow measuring device with foreign matter adhesion prevention device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water flow measuring device equipped with a foreign matter adhesion preventing device used for measuring the water flow in a sewer pipe or the like.
Regarding the table

[0002]

2. Description of the Related Art Conventionally, in order to measure the flow rate in a sewer pipe or the like, a method has been used in which a sensor equipped with an electromagnetic flow meter is installed in the sewer pipe to measure the water flow.

[0003]

When a flow rate of a sewer pipe or the like is measured by an electromagnetic flow meter for a long period of time, if there is a tissue paper or the like in running water, the tissue paper or the like will be caught by the sensor. May accumulate with the passage of time and the flow velocity may not be detected.

In order to prevent the tissue paper and the like from adhering to the flow meter, a method of installing a mesh fence on the upstream side of the sensor can be considered, but with the passage of time, the mesh is closed and accurate flow rate measurement is not possible. It will be impossible.

If the running water contains oil, a layer of an oil film is formed on the flow velocity detecting portion of the flow rate measuring sensor, which makes it difficult to detect the flow velocity.

The present invention has been made in view of the above-mentioned matters, so that tissue paper or the like will not adhere to the sensor for a long period of time, accurate measurement can be performed, and an oil film layer will not be formed in the flow velocity detecting portion of the sensor. To do this is a technical issue.

[0007]

[Means for Solving the Problems] The first invention of the present invention is to
With an outer diameter that matches the inner diameter of 60 , it is formed into a substantially circular shape and expands
A sensor holder that can be fixed by pressing it against the inner surface of the pipe 60.
The sensor 1 is installed on the sensor holder 1
Can be installed by projecting it toward the upstream side of the conduit 60.
The sensor 34 provided with the sir attachment 14 is attached to the sensor attachment 14.The sensor 34 has the tip portion 43 of the bottom surface 42 of the sensor 34 substantially as the frontmost portion of the sensor 34. An inclined surface 44 extending rearward from the tip portion 43 is formed to be connected to the upper surface 45 of the sensor 34, and the tip portion 43 of the sensor 34 is made to substantially contact the inner bottom surface of the pipe 60. The sensor mount 14 is formed so that
The water flow measuring device was equipped with a substance adhesion preventing device .

A second aspect of the present invention is to apply a coating layer of a water-repellent substance to the surface of the sensor 34 of the first aspect to attach foreign matter.
The water flow measuring device was equipped with a prevention device .

The third and fourth aspects of the present invention are based on the first and second aspects of the present invention. The base of the first frame 22 and the second frame are provided on both sides of the sensor holder 1. 24 bases are attached, and the first frame 22 and the second frame 24 are the sensors held by the sensor fixture 14.
The first tip end portion 23 of the first frame 22 and the second tip end portion 25 of the second frame 24 are connected to each other by extending forward on the upstream side of 34, and further, the first frame 22 and the second frame 24 are connected to each other. , Attach the tip 58 of the third frame 57,
The rear end of the 57 extends to the downstream side and is equipped with a suspended matter removal device that is inclined toward the center of the pipe to prevent foreign matter from adhering.
The water flow measuring device was equipped with a stand .

In a fifth aspect of the present invention, a hose 29 connected to a washer pump of the third aspect of the present invention is attached, and a nozzle 31 of a cleaning liquid ejection pipe 30 connected to the hose 29 is attached to the sensor holder 1. Sensor
The flow velocity detecting unit 36 of the sensor 34 is washed with the liquid ejected from the nozzle 31.
Water flow measurement with a foreign matter adhesion prevention device
The device .

[0011]

1 and 2 are views for explaining the embodiments of the first to fourth inventions of the present invention, and the sensor holder 1 shown in FIGS. 1 and 3, and this sensor holder. 1
The floating matter removing apparatus attached to the above-mentioned apparatus has the same configuration as the floating matter removing apparatus of Japanese Patent Application No. 1-92772 previously filed by the present applicant.

In this embodiment, the sensor holder 1 is formed by bending a rigid steel strip made of stainless steel so as to have a substantially circular outer diameter that matches the inner diameter of the pipe 60. At the upper ends 4, 4,
The left-hand screw bolt 8 and the right-hand screw bolt 8 are attached so as to face each other, and the turnbuckle 10 is screwed onto the bolts 8 and 8, and the turnbuckle 10 is rotated in one direction to make the sensor holder 1
Expand the space between the ends 4 and 4 of the sensor holder 1
The outer surface of and attach the sensor holder 1 in Kanmizo 60 by pressure contact with the inner surface of the Kanmizo 60.

A sensor mount 14 is provided at the bottom of the sensor holder 1. The sensor mount 14 is formed by tightening a lower bracket and an upper holder with bolts.
Hold the mounting tube 35 of the sensor 34 and insert the sensor 34 into the conduit.
It is formed so that it can be projected and held toward the upstream side of 60.

Then, on both sides of the portion of the sensor holder 1 where the sensor mounting member 14 is provided, a first frame mounting member 15 formed in a cylindrical shape and a second frame mounting member 15 formed in a similar cylindrical shape. A frame fixture 17 is attached, and a base portion of a first frame 22 formed of a stainless steel pipe is fitted and attached to the first frame fixture 15, and a second frame fixture 17 is attached. A base portion of a second frame 24 having the same structure as the first frame 22 is fitted and attached.

The first frame 22 and the second frame 24 are connected to the sensor 34 held by the sensor mount 14.
Of the V-shaped connecting member extending to the front of the upstream side of the first frame 22 and the second distal end 25 of the second frame 24.
Both ends of 26 are fitted and fixed to secure the first tip 24 and the second tip.
25 are connected.

Further, the first frame 22 and the second frame 24
A first bar 53 and a second bar 54 are bridged between them, and both ends are fixed to the first frame 22 and the second frame 24,
The tip end portions 58a and 58a of the third frames 57a and 57a are attached to the central portion of the first bar 53 and the central portion of the second bar 54, whereby the third frame 57 is moved to the first frame 22. And attached to the second frame 24. The free ends of the rear ends of the third frames 57a, 57a extend downstream and are provided so as to be inclined toward the center of the tube so that tissue paper or the like can flow away from the sensor 34. There is.

Further, the cable or the like fixture 18 is a sensor 34.
It is a stopper for the cable 39 connected to
Is connected to a data logger (not shown).

FIG. 2 is an enlarged view of the sensor 34 as compared with the other drawings. The sensor 34 is formed by an electromagnetic sensor near the tip of the main body made of a non-magnetic material.
36 is provided, a water level detection unit 37 formed by a water pressure sensor is provided near the base, and this flow velocity detection unit 36 and water level detection unit 37 are connected to a data logger with a cable 39 via a preamplifier 38, and a sensor At the base of 34, there is provided a mounting cylinder part 35 with a slit, and this sensor 34 measures the flow velocity and the water level at the same time by the flow velocity detecting part 36 and the water level detecting part 37, and outputs them to the data logger as an analog signal. Is what
The case is made of synthetic resin.

The sensor 34 substantially forms the tip end portion 43 of the bottom surface 42 of the sensor 34 as the frontmost portion of the sensor 34, and the sensor 34 is an inclined surface 44 extending rearward from the tip end portion 43. It is formed so as to be connected to the upper surface 45 of the sensor 34, and the surface of the sensor 34 is coated with ethylene tetrafluoride, which is a water-repellent coating.

Further, the tip portion 43 of the sensor 34
Is installed substantially in contact with the inner bottom surface of the pipe 60, and the water flow in the pipe is measured.

The fact that the tip end portion 43 is substantially the frontmost portion and that the tip end portion 43 is substantially abutted on the inner bottom surface of the pipe 60 is the tip end portion 43.
However, when it is not formed sharply like a knife edge, and even when the tip portion 43 is not necessarily in close contact with the inner bottom surface of the pipe 60, in order to prevent the adhesion of tissue paper or the like, It is expressed that the tip end portion 43 of the bottom surface 42 includes one that is installed very close to the inner bottom surface of the pipe 60.

FIG. 3 shows a diagram for explaining the fifth inventions of one embodiment, the same parts as follows indicated above in Figure 1 part, omitted with the same reference numerals did.

In the embodiment shown in this drawing, a washer pump (not shown) is provided at the rear end of the second frame mounting member 17 formed in the same shape as the first frame mounting member 15 formed in the cylindrical shape. The connected hoses 29 are respectively connected and attached, and the first frame attachment 15 and the second frame attachment are attached.
The third frame 57b is attached to the connecting portion of the first tip portion 23 of the first frame 22 and the second tip portion 25 of the second frame 24, which are attached to the first frame 22 and are formed of stainless steel pipe.
Is attached to the tip 58b of the third frame 57b
The free end of the rear end portion extends to the downstream side and is inclined toward the center of the pipe to reach the vicinity of the sensor fixture 14.

Then, the first frame 22 and the second frame 24
The stainless steel pipe of the first bar 53, which is hung on the pipe, communicates with the inside of the pipes of the first frame 22 and the second frame 24. The tip 32, 32 of 30 is attached, and the free end of the rear end of the cleaning liquid ejection pipe 30, 30 is the sensor 34.
Extends to both sides.

Nozzles 31 are provided near the rear ends of the cleaning liquid ejection pipes 30 and 30, respectively, and the hose 29 is provided.
The cleaning liquid supplied from the first frame attachment 15 and the second frame attachment 17 passes through the first frame 22 and the second frame 24, the first bar 53 and the cleaning liquid ejection pipes 30 and 30, and the nozzle 31. , 31 is ejected to both sides of the sensor 34 to wash the side of the flow velocity detecting portion 36 of the sensor 34.

The washer pump is a passenger car washer pump that is used as it is. A DC9V battery of a direct current power source is used, and the injection time is set by a timer device in the control box. It can be arbitrarily changed, and is set so that the injection can be performed immediately before the measurement time which does not overlap with the measurement time of the sensor 34.

The control box, washer pump, and battery are suspended at the steps in the manhole as in the data logger.

The sensor holder 1 is divided into an upper part and a lower part, and is pivotally attached to the hinge parts 2 and 2 by shafts 3 and 3, and the bolts 8 and 8 are pivot shafts 9 and 9.
It is rotatably attached to the ends 4, 4 of the sensor holder 1.

Further, in the above embodiment, the cleaning liquid jetting pipe 30
Although the cleaning liquid ejection pipe 30 can be formed separately from the first frame 22 and the second frame 24 and attached to the sensor holder 1, the cleaning liquid ejection pipe 30 is provided on the first bar 53. Can be formed so as to be used also as the third frame.

FIG. 4 shows another embodiment of the sensor 34. In this embodiment, a cap-shaped dummy sensor 41 made of synthetic resin is provided on the front part of the main body 40 of the sensor 34.
Is fitted.

The main body 40 of this sensor 34 is
The dummy sensor 41 is installed so as to be spaced from the inner bottom surface of the pipe 60, and the tip end portion 43 of the bottom surface 42 of the dummy sensor 41 is installed so as to contact the inner bottom surface of the pipe 60.

FIG. 5 shows another embodiment of the sensor 34. In this embodiment, the bottom surface of the main body 40 of the sensor 34 and the bottom surface 42 of the dummy sensor 41 are formed so as to be flush with each other. And when formed in this way, the water level detection part needs to be formed so as to be able to communicate with the outside of the main body 40.

As described above, when the long-shaped dummy sensor 41 is connected to the front portion of the sensor body 40, when oil adheres to the tip of the dummy sensor 41, the oil grows and the flow velocity detecting portion 36 is formed. It takes a long time to form a covering film.

Further, the bottom surface 42 of the sensor 34 may be formed in the same arcuate surface as the inner surface of the pipe 60, but this is not a necessary requirement.

FIG. 6 shows the results of an experimental example of the present invention. This experimental example is based on the sensor holder 1 shown in FIG.
From the first frame 22, the second frame 24, etc., is used, and the tip portion 43 of the bottom surface 42 provided on the sensor 34 is used.
Is brought into contact with the inner bottom surface of the pipe 60 to measure the water depth and the flow velocity of the water. The pipe 60 is a sewer pipe, and the flowing water contains paper pieces and dirt.

As is apparent from FIG. 6, the device of the present invention is
According to the measurement of the water flow performed by using the water flow rate, the flow speed is slightly proportional to the water depth, although it slightly changes with the passage of time, and it is shown that the measurement of the flow speed is not affected by the paper pieces and dirt.

FIG. 7 shows the experimental results of the comparative example. This comparative example uses the same sensor holder 1 as in the experimental example, and the sensor has an arc-shaped tip portion of the sensor, and between the bottom surface of the tip portion and the inner bottom surface of the pipe,
The measurement was carried out with a sensor installed with a gap of approximately 4 mm.

In this comparative example, as is apparent from the figure, the water depth was measured accurately, but the measured value of the flow velocity was extremely low about 1 hour after the start of the experiment, and the measurement of the flow velocity was accurate. Shows that it is not done.

[0039]

According to the present invention, the tip portion of the bottom surface 42 of the sensor 34 is
43 is substantially the frontmost part of the sensor 34, and the sensor 34 has an inclined surface extending rearward from the tip part 43.
44, is formed by connecting the upper surface 45 of the sensor 34, further, the distal end portion 43 of the sensor 34, is obtained by installing substantially brought into contact with the inner bottom surface of Kanmizo 60.

Therefore, a piece of paper or the like flowing in front of the sensor 34 does not adhere to the head of the sensor 34 or enter between the bottom surface 42 of the sensor 34 and the inner bottom surface of the pipe 60 to be caught by the measurement. It does not hinder the

Since the sensor 34 is provided with the water-repellent coating layer, the sensor 34 can be prevented from being covered with the oil film.

Further, the first frame 22 and the second frame 24
To the front of the upstream side of the sensor 34, and
The tip end portion 23 and the second tip end portion 25 are connected, and the tip end portion 48 of the third frame 47 whose rear end portion extends while inclining toward the center of the pipe is attached to the first frame 22 and the second frame 24. Therefore, the tissue paper or the like that has flowed upstream of the sensor 34 will not be fed to the first frame 22, the second frame 24 and the third frame.
It can be prevented from being caught by the sensor 34 because it is excluded by the frame 47, and accurate measurement can be performed.

Further, the oil attached to the sensor 34 is stored in the nozzle.
It is washed by the liquid ejected from 31 and prevents the oil film layer from being formed on the outer surface of the sensor, and can accurately measure the flow velocity.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

2 is an enlarged perspective view of the sensors of Figure 1.

FIG. 3 is a perspective view of another embodiment.

FIG. 4 is a side view of another embodiment of a sensor.

FIG. 5 is a side view of another embodiment of the sensor.

FIG. 6 is a diagram showing experimental results of an example of the present invention.

FIG. 7 is a diagram showing an experimental result of a comparative example of the present invention.

[Explanation of symbols]

 1 Sensor Holder 14 Sensor Fixture 22 1st Frame 23 1st Tip 24 2nd Frame 25 2nd Tip 29 Hose 31 Nozzle 34 Sensor 42 Bottom 43 Tip 44 Slope 45 Top 60 Pipe

Claims (4)

(57) [Claims] 1. An outer diameter matching the inner diameter of the pipe 60 , which is approximately circular.
Once formed, it can be expanded and fixed by pressing it against the inner surface of the pipe 60.
The sensor holder 1 is provided, and the sensor holder 14 is provided on the sensor holder 1 so that the sensor 34 can be mounted so as to project toward the upstream side of the conduit 60.
The sensor 34 attached to the attachment 14 forms the tip end portion 43 of the bottom surface 42 of the sensor 34 substantially as the forefront portion of the sensor 34, and the sensor 34 has an inclined surface 44 extending rearward from the tip end portion 43.
Then, it is formed by connecting to the upper surface 45 of the sensor 34,
The sensor mounting so that the tip portion 43 of the sensor 34 can be placed substantially in contact with the inner bottom surface of the pipe 60.
Water flow measuring device equipped with a foreign matter adhesion prevention device with a tool 14
Place . The surface of 2. A sensor 34, Bei a foreign matter prevention device according to claim 1, wherein the coated layer of the water repellent material
Water flow measuring device . 3. A base portion of a first frame 22 and a base portion of a second frame 24 are attached to both sides of the sensor holder 1, and the first frame 22 and the second frame 24 are held by the sensor fixture 14. The first tip portion 23 of the first frame 22 and the second tip portion 25 of the second frame 24 are connected to each other by extending to the front of the upstream side of the sensor 34, and further, the first frame 22 and the second frame 24 are connected to each other. Attaches the tip portion 58 of the third frame 57, and the rear end portion of the third frame 57 extends to the downstream side, and is equipped with a suspended matter elimination device that is inclined toward the center of the pipe. A water flow measuring device comprising the foreign matter adhesion prevention device according to claim 1. 4. A hose 29 connected to a washer pump is attached to the sensor holder 1, and a nozzle 31 of a cleaning liquid ejecting pipe 30 connected to this hose 29 is directed to a flow velocity detecting portion 36 of a sensor 34 attached to the sensor holder 1. The sensor is opened by the liquid ejected from this nozzle 31.
The water flow measuring device comprising the foreign matter adhesion prevention device according to claim 3, which is formed so as to wash the flow velocity detecting portion 36 of 34.