JP7239312B2 - Air release device - Google Patents

Description

The present invention relates to an air bleeding device.

For example, Patent Literature 1 discloses a drainage device (air bleeding device) provided for a vent pipe outlet. By providing such a drainage device detachably at the outlet of the vent pipe (branch pipe), it is possible to discharge air remaining in the piping system before the actual operation of the piping system during the water pressure test.

JP 2010-031751 A

However, in the above-described drainage device, the liquid that has flowed in with the air when the air is removed is discharged as it is. Therefore, there is a problem that liquid loss occurs during air bleeding.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object of the present invention is to suppress liquid loss during air bleeding.

As a first means for solving the above problems, the present invention provides an air bleeding device connected to a branch pipe branched from a main pipe, comprising a liquid level confirmation part that allows the liquid level height to be visually confirmed. , a detachable connection portion connecting the liquid level confirmation portion and the branch pipe, a branch portion provided in the connection portion and branching, and a liquid drain valve provided in the branch portion. to adopt.

As a second means, in the first means, the connection portion includes a connection coupler attached to the branch pipe, and a liquid A configuration is adopted in which a pull-out tube is provided.

As a third means, in the first or second means, an ejection preventing portion is provided at an end portion of the liquid level checking portion and prevents the liquid from ejecting from the liquid level checking portion. Adopt configuration.

As a fourth means, in the above-mentioned third means, a configuration is adopted in which the ejection preventing portion has a labyrinth structure.

As a fifth means, in any one of the first to fourth means, the liquid level confirmation section is a level gauge.

As a sixth means, in any one of the first to fifth means, the liquid level confirming section has a scale that enables measurement of the liquid level height.

According to the present invention, it is possible to perform the air bleeding operation while visually recognizing the liquid surface of the liquid, so that it is possible to prevent the liquid from spouting. Further, it is possible to drain the liquid remaining in the apparatus through the branch, and it is easy to return the drained liquid to the main pipe. Therefore, it is possible to suppress liquid loss during air bleeding.

1 is a schematic diagram of an air removal device according to an embodiment of the present invention; FIG. FIG. 5 is a schematic diagram showing a modification of the air removal device according to the embodiment of the present invention;

An embodiment of an air bleeding device according to the present invention will be described below with reference to the drawings.

The air bleeding device 1 according to this embodiment is provided at the open end of the branch pipe P1 of the main pipe P, as shown in FIG. The main pipe P is a pipe through which a liquid such as water flows, and has a branch pipe P1 for air bleeding or sampling. The branch pipe P1 is provided with a valve P2, which allows opening/closing of the flow path. The valve P2 can adjust the flow rate of the liquid flowing through the branch pipe P1 by adjusting the degree of opening.

The air venting device 1 includes a connection coupler 2, a liquid draining pipe 3, a liquid draining valve 4, a level gauge 5 (liquid level checking portion), and a labyrinth portion 6 (spout preventing portion). The connection coupler 2 and the drain pipe 3 correspond to the connection part in the present invention.

The connection coupler 2 is a cylindrical member attached to the branch pipe P1 and has a socket shape. The connection coupler 2 is fixed to the branch pipe P1 by inserting a plug formed at the open end of the branch pipe P1. That is, the connection coupler 2 can be easily attached to and removed from the branch pipe P1.

The drain pipe 3 includes a main pipe portion 3a connected to the connection coupler 2, and a branch portion 3b branched radially from the main pipe portion 3a. The branch portion 3b has an open end and is provided with a liquid drain valve 4. As shown in FIG.

The liquid drain valve 4 is a valve device that is provided at the branch portion 3b and can be manually opened and closed by an operator. The liquid draining pipe 3 and the liquid draining valve 4 allow the operator to flow into the air venting device 1 and remove the remaining liquid. By adjusting the degree of opening of the liquid drain valve 4, it is possible to adjust the flow rate of the liquid at the branch portion 3b. It is also possible to sample the liquid in the main pipe P by opening the liquid drain valve 4 .

The level gauge 5 is a pipe connected to the end of the main pipe portion 3a. This level gauge 5 has a scale 5a formed on its tube surface, for example. With such a level gauge 5, the liquid level inside the pipe can be visually recognized from the outside, and the liquid level height can be measured by reading the scale 5a.

The labyrinth part 6 is a hollow member connected to the end of the level gauge 5 . The labyrinth portion 6 has a plurality of barriers 6a formed in the extending direction inside the tube. The barriers 6a are alternately arranged in the labyrinth part 6 from opposite directions, so that when liquid flows in from the lower part of the labyrinth part 6 (that is, the level gauge 5), the barriers 6a are prevented from flowing out of the labyrinth part 6. prevents it from flowing out.

The air bleeding device 1 according to this embodiment is attached to the branch pipe P1 of the main pipe P for the purpose of air bleeding when the main pipe P is started or the like. When the operator opens the valve P2, the liquid flows into the level gauge 5 via the connection coupler 2. As shown in FIG. The operator visually confirms the liquid level in the level gauge 5 and adjusts the opening of the valve P2 so as to maintain a predetermined liquid level.

By the above operation, gas such as air remaining inside the main pipe P is pushed out when the liquid flows into the level gauge 5, passes through the labyrinth portion 6, and is released to the outside. Moreover, since the liquid in the level gauge 5 is obstructed by the labyrinth portion 6, it is not released to the outside. At the end of air bleeding, the air bleeding device 1 is separated from the main pipe P by closing the valve P2. By opening the liquid removal valve 4 after the valve P2 is closed, the liquid remaining in the air removal device 1 can be removed.

Furthermore, it is possible to sample the liquid in the main pipe P through the liquid drain pipe 3 . In this case, when the liquid flows into the liquid draining pipe 3 from the main pipe P, the operator opens the liquid draining valve 4 to obtain the liquid through the branch portion 3b. At this time, the sampling amount can be measured by using the scale 5a of the level gauge 5. FIG. Further, by marking the volume from the branch portion 3b to the scale 5a on the scale 5a of the level gauge 5, it is possible to accurately measure the liquid volume at the time of sampling.

According to the air bleeding device 1 according to the present embodiment, when bleeding the air from the main pipe P, the opening degree of the valve P2 can be adjusted while visually checking the liquid surface height in the level gauge 5. Therefore, it is possible to perform air bleeding while preventing the liquid from spouting from the branch pipe P1. Therefore, it is possible to reduce liquid loss during air bleeding.

Further, according to the air bleeding device 1 of the present embodiment, the provision of the labyrinth portion 6 prevents the liquid from leaking out even when the liquid level exceeds the level gauge 5 . Therefore, this also makes it possible to reduce the loss of liquid during air bleeding.

Further, according to the air bleeding device 1 according to the present embodiment, the connecting coupler 2 is used to connect to the branch pipe P1, so that the air bleeding device 1 can be easily attached to and detached from the branch pipe P1. .

In addition, in this embodiment, the level gauge 5 has a scale 5a, which makes it possible to measure the liquid level height and, using this, to measure the sampling flow rate at the time of sampling. .

Although the preferred embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the above embodiments. The various shapes, combinations, and the like of the constituent members shown in the above-described embodiment are merely examples, and can be variously changed based on design requirements and the like without departing from the gist of the present invention.

For example, as shown in FIG. 2, a configuration in which the connection coupler 2 is provided with the branch portion 2a without the liquid drain pipe 3 may be employed. In this case, the branch portion 2a of the connection coupler 2 is provided with a liquid drain valve 4. As shown in FIG. By adopting such a configuration, it is possible to remove the liquid at the lower side of the air removing device 1 in the direction of gravity after the air removal is finished. Therefore, more residual liquid can be drained off, further reducing losses.

Further, in the above-described embodiment, the air bleeding device 1 allows the liquid level height to be visually recognized by the level gauge 5, but the present invention is not limited to this. Instead of the level gauge 5, the air venting device 1 may have a transparent pipe made of a glass pipe or the like so that the height of the liquid level can be visually recognized. In this case, the configuration becomes simpler.

In addition, in the above-described embodiment, the labyrinth portion 6 prevents the ejection of the liquid, but the present invention is not limited to this. For example, a lid having a small hole (air hole) may be attached to the upper end of the level gauge 5 to prevent the liquid from blowing out. Moreover, when the pressure of the liquid in the main pipe P is low, the liquid does not spout, so the labyrinth portion 6 or the like may not be provided. In this case, the configuration becomes simpler.

Further, in the above-described embodiment, the connection coupler 2 is used to fix to the branch pipe P1, but the present invention is not limited to this. For example, the connecting portion may be screwed to the branch pipe P1 by a screw structure or the like. Also, the connecting portion may be fixed to the branch pipe P1 by a swivel structure. In addition, in the case of the swivel structure, the air bleeding device 1 is rotatable while being fixed to the branch pipe P1.

1 Air venting device 2 Connection coupler 2a Branching part 3 Liquid draining pipe 3a Main pipe part 3b Branching part 4 Liquid draining valve 5 Level gauge 6 Labyrinth part 6a Barrier P Main pipe P1 Branch pipe P2 Valve

Claims (6)

An air venting device connected to a branch pipe branched from a main pipe and provided with a valve capable of adjusting the flow rate of a flowing liquid,
A tubular liquid level confirmation part that makes the liquid level height visible,
a detachable connecting portion connecting one end portion of the liquid level confirmation portion and the branch pipe; and a branching portion provided in the connecting portion and branching;
and a liquid removal valve provided at the branch. The connection portion includes a connection coupler attached to the branch pipe;
2. The air venting device according to claim 1, further comprising: a liquid drain pipe connected to one end of the connection coupler and the liquid level confirmation portion and having the branch portion. 2. The apparatus according to claim 1, further comprising an ejection preventing portion provided at the other end of the liquid level confirmation portion and preventing the liquid flowing in from the other end of the liquid level confirmation portion from flowing out to the outside. 2. The air venting device according to 2 above. 4. The air bleeding device according to claim 3, wherein the blowout prevention portion has a labyrinth structure. The air bleeding device according to any one of claims 1 to 4, wherein the liquid level confirmation part is a level gauge. The air bleeding device according to any one of claims 1 to 5, wherein the liquid level confirming portion has a scale that enables measurement of the liquid level height.

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