JPS5839381Y2 - turbine meter - Google Patents

Description

[Detailed description of the invention] The present invention relates to a turbine meter, in which a meter body inserted into a flow path of a fluid to be measured is supported rotatably around an axis, and the inside of the meter body is rotated depending on the rotational position of the meter body. To provide a turbine meter configured so that the flow direction of a flowing measured fluid can be changed in two ways, forward and reverse, and thereby allowing dust etc. clogged in the meter body to be extremely easily removed by the measured object itself. The purpose is to

In general, a turbine meter has a configuration in which the meter body is inserted into a large-diameter pipe that serves as a flow path for the fluid to be measured, and the flow rate of the fluid to be measured in the large-diameter pipe is measured from the flow velocity of the fluid flowing inside the meter body. Are known.

However, when the fluid to be measured is exhaust gas from a boiler, the cavity dust contained in the exhaust gas tends to clog, for example, between the inner wall of the meter body and the impeller, or the bearing part of the impeller. It has disadvantages such as the need to take it out from inside the large-diameter pipe and wash and remove the dust and the like.

The present invention eliminates the above-mentioned drawbacks, and an embodiment thereof will be described below with reference to the drawings.

FIG. 1.2 shows a longitudinal sectional front view and a longitudinal sectional side view, respectively, of an embodiment of the turbine meter according to the present invention.

In FIGS. 1 and 2, 1 is a large-diameter pipe that serves as a flow path for exhaust gas from a boiler or the like.

The turbine meter 2 is constructed by rotatably supporting an impeller 4 within a straight tube-shaped meter body 3. The rotation of the impeller 4 is electrically controlled by an electromagnetic pickup 5 provided near the outer wall of the meter body 3. Detected.

The rotation shaft 4a of the impeller 4 is supported by bearings (not shown) provided in the cone members 6 and 7, and in particular, the cone member (cone member 7 in FIG. 2) installed on the downstream side and the impeller 4, dust etc. tend to accumulate between them.

Reference numerals 8 and 9 indicate curved pipes, each of which has one end connected to the openings at both ends of the meter body 3.

The other ends of the bent pipes 8 and 9 are opened in opposite directions, and a filter 10 is attached to each opening.

One end of a handle shaft 11, 12 is fixed to each of the bent pipes 8, 9 by welding or the like.

The other ends of the nozzle shafts 11 and 12 are rotatably inserted through the wall of the large-diameter pipe 1, and the nozzle shafts 13 are inserted into the tips of the nozzle shafts 11 and 12, respectively.
is installed.

14 is an O-ring for air- and liquid-tightly sealing the insertion portion of the handle shafts 11 and 12.

Here, the handle shafts 11 and 12 are both substantially aligned with the axis of the meter body 3, and are substantially orthogonal to the flow direction of the fluid to be measured in the large diameter pipe 1.
It is almost impossible to measure the flow velocity with the bent pipes 8 and 9 removed.

Also, even if the handle shafts 11 and 12 are rotated, the meter body 3 is simply rotated around the shafts.
The electromagnetic pickup 5 does not interfere with the rotation of the meter body 3.

When measuring the flow rate of the fluid to be measured, the opening of one of the curved pipes 8 is opposed to the upstream side of the fluid to be measured, as shown by the solid line in FIG.

As a result, a part of the fluid to be measured flowing inside the large-diameter pipe 1 flows into the curved pipe 8 via the filter 10 of the curved pipe 8, passes through the meter body 3, and exits the meter 2 from the opening of the curved pipe 9. leaks to.

When the fluid to be measured passes through the meter body 3, the impeller 4 rotates according to the flow velocity of the fluid to be measured, and at this time, the rotation of the impeller 4 is detected by the electromagnetic pickup 5, and the rotation speed of the impeller 4 is A corresponding pulse signal can be obtained.

Here, after measuring the flow rate with the curved pipe 8 on the upstream side for a certain period of time, we will now measure the flow rate with the curved pipe 9 on the upstream side.

In that case, first, the bundle 13 is rotated 180 degrees in one direction.

Then, the bent pipes 8 and 9 each change their direction by 180 degrees, and are in the state shown by the dotted chain lines in FIG. 2.

That is, the opening of the curved pipe 9 opens toward the upstream side of the fluid to be measured, and the opening of the curved pipe 8 opens toward the side away from the fluid to be measured. As a result, the inside of the meter 2 The measured fluid passing through the curved pipe 9,
The fluid flows in the order of the meter body 3 and the bent pipe 8, and the flow of fluid within the meter body 3 is completely reversed from the previous case.

Therefore, the direction of rotation of the impeller 4 is also completely reversed, but this does not cause any problem in flow rate measurement since the electromagnetic pickup 5 outputs a pulse signal according to the rotation speed of the impeller 4 as before. .

By changing the direction of the flow inside the meter body 3, for example, the dust that was stuck between the impeller 4 and the inner wall of the meter body 3, or between the cone member 6, especially 7, and the impeller 4, and In this case, the dust and the like that have clogged the filter 10 can be easily and effectively removed by the flow in a different direction.

Therefore, by operating the bundle 13 at regular intervals and rotating the bundle shafts 11 and 12 by 180 degrees, dust attached to various parts of the meter body 3 can be removed from the large diameter pipe 1. Even without removing it, it can be removed extremely easily by the flow of the fluid to be measured itself.

In the above embodiments, exhaust gas from a boiler or the like is used as an example of the fluid to be measured, but other gases or even liquids may be used.

As described above, the turbine meter according to the present invention has a meter body installed in a flow path of the fluid to be measured, which is rotatable within the flow path, and by rotating the meter body, the flow of the fluid passing through the meter body can be rotated. The structure allows the flow direction of the measuring fluid to be changed in two ways, forward and reverse, so after using it in a forward flow state for a certain period of time, you can rotate the meter body and measure the flow rate in a reverse flow state. Dust, etc. stuck in various parts of the meter body can be removed extremely easily by the flow of the measured fluid itself, and the meter body is installed in a direction approximately perpendicular to the flow and can be rotated around its axis. , for example, an electromagnetic pickup or the like can be disposed near the outer wall of the meter body, and the rotation of the impeller can thereby be electrically measured.

[Brief explanation of the drawing]

1 and 2 are a vertical front view and a vertical side view, respectively, of an embodiment of a turbine meter according to the present invention. 1... Large diameter pipe, 2... Turbine meter, 3... Meter body, 4... Impeller, 8, 9... Bent pipe, 11.12...No-endoru axis.

Claims (1)

[Scope of utility model registration request] A straight tube-shaped meter body that rotatably supports an impeller, curved tubes that are connected to openings at both ends of the meter body and open in opposite directions, and a meter body that is connected to the flow of the fluid to be measured in a straight path. A turbine meter comprising a shaft that is supported substantially perpendicularly to the shaft and that allows the meter body to be rotated around the axis by being rotated from the outside.