JPH0537246Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a cup-type anemometer that can be used continuously in an atmosphere with a high dust concentration, such as for measuring the dust collection air volume of a dust collector.

(Prior Art) Conventionally, as an example of the cup-type anemometer as described above, one shown in Japanese Utility Model Application Laid-open No. 62-76667 is known.

This wind cup-type anemometer is held on a vertical shaft and rotates on a horizontal plane as the shaft rotates.The wind cup has a ventilation hole in the center. The dust that has entered can be discharged by the wind from the front of the cup by flowing it along the inner surface towards the center and out through the ventilation holes, or by the wind from the back of the cup. This was done to prevent dust from accumulating on the inside of the cup.

(Problem to be solved by the invention) However, in the cup-type anemometer described above, there is a limit to the amount of dust that can be discharged to the outside of the cup due to wind received from the front or back, and the dust that is not discharged is at the bottom of the cup. There was a problem in that the accuracy deteriorated due to accumulation and it could not be used for long-term continuous measurements.

That is, in general, when dust 3 enters the cup 2 held by the vertical shaft 1 as shown in FIG. 6a and 6b, forming a dust deposit 5. This dust deposit 5 gradually increases in size upward. If no ventilation holes are formed in the center 6 of the cup 2 as shown in FIGS. 7a and 7b, the dust deposits 5 will rise until they reach the center 6. On the other hand, in the center 6 of the wind cup 2, No. 8a,
When the ventilation hole 7 is drilled as shown in Figure b, the dust near the ventilation hole 7 is discharged to the outside from the ventilation hole 7, so the dust deposits 5 are removed from the ventilation hole 7.
It has a concave shape in the vicinity and is smaller than in the case of FIGS. 7a and 7b. However, even with a cup-type anemometer in which a ventilation hole 7 is bored in the center 6 of the cup 2 as shown in FIGS. 8a and 8b, dust deposits 5 gradually form. Since the accuracy would be reduced due to the weight of the weight, it was not possible to carry out continuous measurements over a long period of time.

Note that it is possible to use the Anemo Master to measure airflow in an atmosphere with a high concentration of dust, but in this case, dust will adhere to the sensor section, reducing detection accuracy and making long-term continuous measurement impossible. The reality was that there was no such thing.

This invention was made in view of the above circumstances,
The purpose of the present invention is to provide a cup-type anemometer that can be used continuously for a long time with high accuracy even in an atmosphere with a high dust concentration.

(Means to solve the problem) Regarding the means to achieve the above purpose,
The present invention will be explained with reference to FIGS. a and b and FIGS. 2a and 2b. The present invention includes a tip portion 31 of a wind cup 30 that is held on a horizontally disposed rotating shaft 20 and rotates around the rotating shaft 20. , the slit 3 as a void part
It is characterized by forming 3.

(Function) With the above configuration, the present invention allows the dust that has entered the wind cup 30 to reach the inner wall by wind pressure, and at the same time moves it to the tip 31 by centrifugal force and gravity to form the slit 33. Since the dust is not deposited on the inside of the wind cup, the detection accuracy does not deteriorate due to the weight of the dust, and wind speed can be continuously measured with high accuracy over a long period of time.

(Example) Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

1a, b and 2a, b show a cup-type anemometer according to a first embodiment of the present invention.

In Figures 1a and 1b, 10 is a duct;
A support portion 11 is provided outside the duct 10. A rotary shaft 20 is rotatably supported on the support portion 11 . This rotating shaft 20 leaves its shaft support outside the duct 10, and is disposed horizontally inside the duct 10 by passing through a hole formed in the duct 10.

Three bars 21 extending in the radial direction of the rotating shaft 20 are attached to the tip of the rotating shaft 20 at equal intervals in the rotational direction of the rotating shaft 20. A hemispherical wind cup 30 is supported on each bar 21 with its orientation aligned.

The wind cup 30 is adapted to rotate in the direction of the arrow A in response to the wind, and near the peripheral edge 32 of the wind cup 30 located at its tip 31, there are a plurality of holes as shown in FIGS. 2a and 2b. The arc-shaped slit 33 is located at the peripheral edge 3.
They are formed in a line along 2. In this case, the size of the slit 33 is set to be about several percent of the entire inner surface of the wind cup 30 to reduce the amount of air leakage, and is set so as not to affect the wind speed measurement.

In the wind cup type anemometer configured as described above, when the wind cup 30 receives wind from the front, the dust 40 inside the wind cup 30 is moved by the wind to the wind cup 3, as shown in Fig. 2b.
0, then moves along the inner wall due to centrifugal force and gravity to reach the slit 33, and is discharged from the slit 33 to the outside of the cup 30 as shown by arrow B. Further, when the wind cup 30 receives wind from the back side, the wind enters the inner side through the slit 33, and the dust 40 near the tip 31 of the wind cup 30 is blown away. The wind cup 30 that receives the wind rotates in the direction of arrow A around the shaft 20, and the above-mentioned dust removing action is repeatedly performed to prevent dust from accumulating on the inner surface. As a result, the detection accuracy is not reduced due to the weight of dust, and this cup-type anemometer can perform continuous measurement over a long period of time.

Note that in this embodiment, the support portion 11 is disposed outside the duct 10, so that dust will not enter the shaft support of the rotating shaft 20, thereby preventing rotation failure.

Next, a second embodiment of the present invention will be described with reference to FIG.

The wind cup type anemometer shown in FIG. 3 holds a wind cup 50 on a rotating shaft 20 via a bar 21.
A plurality of arc-shaped slits 53 are formed in two rows along the peripheral edge 52 of the distal end 51 and are alternately formed in each row.

In the cup type anemometer shown in Figures 2a and 2b, it takes some time for the dust on the inner surface of the cup 30 between adjacent slits 33 to be discharged; dust can be quickly discharged.

Note that in the cup type anemometers of the first and second embodiments, the cup 30, 50 has arc-shaped slits 33, 53.
Although the case where the holes 60 are formed is taken as an example, instead of the arc-shaped slits 33 and 53, circular holes 60 may be formed in a staggered manner as in the third embodiment shown in FIG.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. 5a and 5b.

The cup-type anemometer shown in FIGS. 5a and 5b has a cup 70 held on the rotating shaft 20 via a bar 21, and the tip 71 of the cup 70 is partially cut off at an angle from the vertical line. A gap 72 is formed in the cut portion.

In this cup-type anemometer, the cup 70 rotates in the direction of arrow A when it receives wind, while the dust 80 inside the cup 70 hits the inner wall and is moved against the inner wall by centrifugal force and gravity. The liquid then moves and finally reaches the cavity 72, from which it is discharged to the outside. As a result,
Similar to the cup-type anemometer shown in FIGS. 2a and 2b, this cup-type anemometer can carry out continuous measurement over a long period of time without depositing dust on the inner surface.

Although not explained in the above-mentioned embodiments, by coating the inner wall of each cup with a material having low frictional resistance, adhesion of dust can be more effectively suppressed.

(Effects of the invention) As explained above, in the present invention, the dust inside the wind cup is discharged from the gap formed at the tip of the wind cup by the wind, and does not accumulate on the inner surface of the wind cup. This has the effect that the wind speed can be continuously measured with high accuracy over a long period of time without causing a decrease in detection accuracy due to the weight.

[Brief explanation of the drawing]

Fig. 1a is a side view showing the cup-type anemometer according to the first embodiment of the present invention, Fig. 1b is a front view showing the cup-type anemometer, and Fig. 2a is the cup of the cup-type anemometer. FIG. 2B is a front view showing the cup of the same wind, FIG. 3 is a front view of the cup of the cup-type anemometer according to the second embodiment of the present invention, and FIG. FIG. 5a is a front view showing the cup of the cup-type anemometer according to the third embodiment; FIG. 5a is a sectional view showing the cup of the cup-type anemometer according to the fourth embodiment of the present invention;
Figure 5b is a front view showing the same wind cup, Figure 6a is a sectional view showing an example of a conventional wind cup type anemometer, Figure 6b is a front view showing the wind cup of the same anemometer, Figures 7a and 7b. 8A and 8B are schematic diagrams showing the state of dust accumulation in a wind cup with no ventilation holes, respectively, and FIGS. 8a and 8b are schematic diagrams showing the dust accumulation state in a wind cup with ventilation holes, respectively. 20... Rotating shaft, 21... Bar, 30, 50,
70... Wind cup, 31, 51, 71... Tip, 3
3, 53...slit, 60...hole, 72...void.

Claims (1)

[Scope of utility model registration request] A cup-type anemometer that is held by a horizontally disposed shaft and rotates around the shaft, and has a gap connected to the inside and outside of the cup formed at the tip of the cup.