JPH0128426Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a flowmeter with a strainer, more specifically, to an improvement of a flowmeter with a strainer that has a strainer in the inlet flow path in the flowmeter, and particularly to An expanded area flow path section is provided, a strainer is stretched over the expanded area flow path section, and
In addition to improving the filtration efficiency of the strainer, the strainer can be used for a longer period of time to facilitate maintenance and management.

1 to 7 are configuration diagrams for explaining an embodiment of the present invention. In FIGS. 1 and 2, 10 is an inlet channel 11 and an outlet channel 12 for the fluid to be measured. Reference numeral 20 indicates an instrument main body incorporating a measuring mechanism consisting of rotors 21 and 22, 30 indicates an instrument cover, 40 indicates a measurement display section, and as is well known, an inlet flow path is shown. 11 into the meter body 20, the fluid to be measured flows into the meter body 20 from the meter body 20.
0 through the outlet channel 12, but at that time, while passing through the instrument body 20, the rotor 2
1 and 22 are rotated according to the flow rate. Therefore,
The flow rate can be measured by counting the rotations of the rotor 21 or 22, and generally,
A permanent magnet 23 (see FIG. 4) is integrated into the rotor 21 or 22, and the permanent magnet 23
rotation (=rotation of the rotor) is transmitted to the weighing display section 40 via the magnetic coupling, and the weighing display section 4
Although the integration is displayed at 0, the rotation of the permanent magnet 23 is also detected as an electrical pulse signal using a reed switch or the like, and the integration is displayed at a remote location. . In the above-mentioned flowmeter, if dust such as grain sand or iron chips is mixed into the fluid to be measured, this may damage the metering mechanism inside the meter body and prevent long-term use. There is a problem if the measurement error becomes large while the measurement is being carried out. In order to avoid such problems, a strainer has conventionally been disposed in the inlet channel 11, but especially in micro flowmeters, etc., the fluid channel area is small, so
The effective usable area of the strainer is also small, and as a result, the strainer deteriorates quickly, gets clogged, etc., and its maintenance is difficult.

The present invention was made to solve the problems of the conventional technology as described above, and in particular, it aims to eliminate early deterioration, clogging, etc. of the strainer in flowmeters equipped with a strainer, and to facilitate maintenance management. It is ivy.

In FIG. 1, 50 is a strainer, and 60 is an intermediate plate member. In the present invention, an enlarged area flow path portion A is configured in the inlet flow path 11 by the back cover body portion 10 and the intermediate plate member 60. , a strainer 50 is stretched over the enlarged area flow path section A. Therefore, according to the present invention, the effective usable area of the strainer is increased, its deterioration, clogging, etc. are alleviated, its effective usage period is extended, and maintenance management is facilitated.
Note that FIG. 3 is a sectional view showing another example of the lid body section, in which, instead of the lid body section 10 shown in FIG. It is also possible to use a lid part 10' having an inlet channel 12'. In addition, Fig. 2 shows - of Fig. 1.
4 is a cross-sectional view taken along the - line in Fig. 2, Fig. 5 is a view taken from the - line direction in Fig. 4, and Fig. 6 is a sectional view taken in the - line direction in Fig. 1. Figure 7 is a view seen from the - direction of Figure 1, in which 70 is an initial air bleed bolt, 80 is a drain bolt, 90 is a support screw hole, and other parts are shown. 1 and 2 have the same reference numerals as in FIGS. 1 and 2.

As is clear from the above explanation, according to the present invention, the effective usable area of the strainer can be increased without increasing the size of the measuring instrument body, and therefore deterioration, clogging, etc. of the strainer can be alleviated. The effective usage period can be extended, and maintenance management of the flowmeter can be facilitated.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a flowmeter with a strainer according to the present invention, FIG. 2 is a view seen from the − direction of FIG. 1, and FIG. 3 is a back cover body portion 10 shown in FIG. 1.
4 is a sectional view taken along the - line in FIG. 2, FIG. 5 is a view taken from the - line direction in FIG. 4, and FIG. FIG. 7 is a view seen from the - line direction of FIG. 1. 10, 10'...Back cover body part, 20...Meter body part, 30...Lid body part, 40...Measurement display part, 50
... Strainer, 60 ... Intermediate plate member, 90 ...
Initial air bleed bolt, 80... Drain bleed bolt, 90... Screw hole for support.

Claims (1)

[Scope of utility model registration request] A back cover body, an intermediate plate member that is fitted into the back cover body so as to be flush with each other and has a common inlet channel and an outlet channel, and the intermediate plate member and the instrument cover body. A meter body housing a pair of gears that are fluid-tightly sandwiched between the two and rotate according to the flow rate of fluid flowing in from the inlet channel; A counting part for indicating the flow rate is integrally formed, and the inlet flow path in the back cover body part and the intermediate plate member is an enlarged area flow path part,
A flowmeter with a strainer, characterized in that a flat strainer is removably attached to the enlarged area flow path.