JPH0723877U - On-off valve built-in air venting device - Google Patents

Abstract

(57) [Summary] [Purpose] The on-off valve that opens and closes the opening of the pipe line when the air valve is attached and detached and the air valve are integrally and compactly connected to improve the efficiency of maintenance and repair of the air valve. We also provide an on-off valve built-in air vent device that reduces equipment costs and facilitates handling and storage management. [Structure] An adapter 2 fixed to an opening 11 of a tubular body 10 and penetrating an air vent hole 7 through a seat surface 6, and an air vent hole 7
Valve box 15 integrally formed on the lower side with an on-off valve 3 supported by an adapter 2 for closing the valve and a hollow cylindrical portion 9 inserted into the air vent hole 7 and abuttingly engaged with the on-off plate 8 of the on-off valve 3.
And the air valve 4 having the float valve 21, the exhaust portion 25, the auxiliary exhaust portion 28, and the like, and the spring 5 for pressing the opening / closing plate 8 against the lower surface of the hollow cylindrical portion 9, and the opening / closing plate 8 is normally used for the valve box 15. By pressing in the opening direction to communicate the tube body 10 with the float chamber 17 of the valve box 15 through the communication hole 14 and the like, and by removing the air valve 4, the opening / closing plate 8 closes the air vent hole 7 of the seat surface 6. To do.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an air vent device installed in pipelines such as water supply pipes, liquid transport pipes, various plant pipes, and water pipes. In particular, when an air valve is removed, an on-off valve that closes the pipeline as it is is integrated. The present invention relates to an on-off valve built-in type air bleeding device that is provided in a dedicated manner.

[0002]

[Prior art]

 As shown in Fig. 4, the pipe body 10 of the pipeline is provided with an opening 11 for venting air in the middle of the pipeline, and water in the pipeline and air mixed in the liquid are drained to protect the water and the liquid. And, we are trying to facilitate the distribution. An air valve 33 is installed in this opening 11 so that air is released only when air bleeding is required.

Conventionally, there are various types of air valves, for example, “air venting device for pipeline” in Japanese Utility Model Laid-Open No. 61-137179 and “air venting for buried pipe” in Japanese Utility Model Laid-Open No. 62-190193. There is a known technique such as "apparatus" and the like, and the same applicant discloses in Japanese Utility Model Application Laid-Open No. 57-5 1877 (Japanese Utility Model Publication No. 63-21818) and as an improvement thereof, in Japanese Utility Model Application Laid-Open No. 59-77675 (Japanese Utility Model Publication No. 63-16944). Japanese Patent Publication).

FIG. 5 shows a schematic structure of the “air valve” disclosed in Japanese Utility Model Publication No. 63-16944. This structure will be briefly described. A valve box 15a that is detachably connected to the pipe body 10 (FIG. 4) side of the pipeline, and a float valve 21 that floats in the valve box 15a by being guided by a guide frame 23. And an exhaust part 25 having an exhaust port 24 eccentrically provided on the guide rod 23 side of the upper lid 22 connected to the valve box 15a, and an auxiliary exhaust port 26a held by the upper lid 22 and opened and closed by a floating valve body 27a. And an auxiliary exhaust unit 28a having The air in the pipe body 10 is exhausted by the exhaust port 24 and the auxiliary exhaust port 26a, and the air is vented from the exhaust port 24 even if the auxiliary exhaust port 26a is closed.

[0005]

[Problems to be solved by the device]

 The various air valves described above each have excellent air venting functions, but have the following problems. That is, as shown in FIG. 6, when the water or liquid supply source 34 and the supply destination 35 are located higher than the burying position of the pipe 10a, the air valve 33a and the opening / closing valve 36 are placed at the higher position as shown in the figure. If not provided, the air valve 33a cannot be removed for maintenance or the like. That is, since it is necessary to install the air valve 33a at a high position of the buried pipe body 10a, the construction is difficult, the equipment cost is high, and the air valve 33a and the like are obstacles.

The present invention solves the above problems and does not need to open and close the pipeline manually each time during maintenance or repair, and the on-off valve can be installed in another position of the pipeline. There is no need to install it, work efficiency can be improved, equipment cost can be reduced, and it can be installed in the optimal part of the pipeline without being affected by external space because it is compact and can be installed in the open / close valve that can sufficiently remove air. It is an object to provide a built-in type air vent device.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is a device for removably attaching to an opening in the middle of a pipeline to remove air from the pipeline, which is provided on the side of the opening. An opening / closing valve that is fixedly attached to the conduit side to slidably support the opening / closing plate of the hole, and a hollow cylindrical portion that is inserted into the air vent hole to press the opening / closing plate in the opening direction. An air valve detachably attached to the air valve, an urging means for urging the opening / closing plate to press it toward the hollow cylindrical portion, and an inside of the conduit and an inside of the air valve when the air valve is attached. The air valve is provided with a communication passage that communicates with each other, and the air valve integrally forms a hollow cylindrical portion and a float chamber communicating therewith, a float valve floating in the valve box, and lifting and lowering of the float valve. An on-off valve with an exhaust port that opens and closes with it It constitutes a built-type venting device. In addition, more specifically, the on-off valve is characterized in that it is housed and disposed in at least the opening.

[0008]

[Action]

 The open / close plate of the open / close valve is pushed in the opening direction by the hollow cylindrical portion of the air valve. Therefore, the air, water, and liquid in the pipeline are always introduced into the air valve through the communication passage that communicates with the opening side, and air is removed. On the other hand, when maintenance or repair of the air valve is required, the air valve is removed from the opening side, but the air vent hole on the opening side opened by removing the air valve is always biased by the biasing means. It is automatically closed by the open / close plate. Therefore, the air, water and liquid in the pipeline are not released outside the pipeline. Further, when mounting the air valve, it suffices to insert the hollow cylindrical portion of the valve box into the opening side and push down the opening / closing plate to fix the valve box to the opening side. Also, since the on-off valve is housed in the opening, it does not protrude outside the pipeline, does not get in the way, and is protected.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an axial sectional view showing the entire structure of the present embodiment, FIG. 2 is a partial axial sectional view showing a state in which an air valve is removed, and FIG. 3 is a partial plan view showing another embodiment of the air valve filter. Is.

As shown in FIG. 1, the on-off valve built-in type air vent device 1 is roughly classified into a seat surface 6 screwed to the opening 11 side of the tubular body 10 and an air vent hole 7 formed through the seat surface 6 (FIG. 2). 2) and an opening / closing valve 3 which has an opening / closing plate 8 for opening / closing the air vent hole 7, is fixed to the adapter 2 side, is housed in the opening 11, and is arranged so as to face the pipe 10. , An air valve 4 having a hollow cylindrical portion 9 inserted into the air vent hole 7 on the lower end side, and a spring 5 which is one of biasing means for pressing the opening / closing plate 8 toward the hollow cylindrical portion 9 and the like. Composed of.

The tubular body 10 is provided with a protruding boss portion 12, and the boss portion 12 is formed with an opening 11 communicating with the inside of the tubular body 10. An adapter 2 that forms a threaded portion inside and outside is screwed and fixed to the threaded portion on the opening side of the boss portion 12. The adapter 2 is formed with a flat seat surface 6 along the axial direction (horizontal direction) of the pipe body 10, and an air vent hole 7 is formed at the center thereof.

The on-off valve 3 is a box-shaped on-off valve main body 13 that is screwed and fixed below a seat surface 6 of the adapter 2 via a packing 13 b, and the on-off valve main body 13 extends vertically. An opening / closing plate 8 that is slidably supported and abuts and engages with the seat surface 6 to close the air vent hole 7. A communication hole 14 is formed through the opening / closing valve body 13 to connect the opening 11 side and the inside of the opening / closing valve body 13.

In the present embodiment, the air valve 4 has substantially the same structure as the air valve disclosed in the above-mentioned Japanese Utility Model Publication No. 63-16944, except for the structure of the valve box 15 and its surroundings. However, it is not limited to this. The valve box 15 has an outer threaded portion 16 that is detachably screwed into a threaded portion on the inner side of the adapter 2, and the hollow cylindrical portion 9 is integrally formed below and a float chamber 17 is formed inside. Consists of. A communication hole 9a is formed through the lower end of the hollow cylindrical portion 9. The float chamber 17 and the inside of the hollow cylindrical portion 9 are defined by a partition plate 19 having a through hole 18. A filter 20 is fixedly arranged below the partition plate 19 around the through hole 18. In the float chamber 17, a conical float valve 21 whose diameter is reduced downward is housed. The upper lid 22 is screwed onto the valve box 15 above. An exhaust part 25 having a guide rod 23 and an exhaust port 24 is provided at an eccentric position on the side of the upper lid 22, and an auxiliary exhaust part 28 having an auxiliary exhaust port 26 and a floating valve body 27 is provided substantially at the center side. There is. The uppermost part is covered with a cover 30 having a gap 29.

The spring 5 is interposed between the bottom plate 13 a of the open / close valve body 13 of the open / close valve 3 and the open / close plate 8 and urges the open / close plate 8 to press against the lower surface of the hollow cylindrical portion 9 of the valve box 15. .

Next, the operation of this embodiment will be described. When maintenance or repair of the air valve 4 is required, the outer threaded portion 16 of the valve box 15 is loosened and the entire air valve 4 is removed from the adapter 2 as shown in FIG. Before removal, the opening / closing plate 8 is located at a position away from the seat surface 6 by being pressed by the lower surface of the hollow cylindrical portion 9 of the valve box 15 as shown in FIG. When the air valve 4 is removed, the pressing by the hollow cylindrical portion 9 disappears, so as shown in FIG. 2, the opening / closing plate 8 advances to the seat surface 6 side by receiving the pressing force of the spring 5 and closes the air vent hole 7. Therefore, even if the communication hole 14 is provided, the air, water, and liquid in the pipe body 10 cannot leak to the outside. That is, the pipe body 10 is automatically closed by the opening / closing valve 3. To install the air valve 4 that has been subjected to maintenance or repair on the tube body 10 side, insert the hollow cylindrical portion 9 of the valve box 15 into the air vent hole 7, and open and close the open / close plate against the spring force of the spring 5 at the lower surface thereof. 8 is pushed down and the outer threaded portion 16 is screwed onto the inner threaded portion of the adapter 2 to be fixed. The state is shown in FIG. Air, water, or liquid in the pipe 10 passes through the communication hole 14 from the opening 11, enters the communication hole 9a of the hollow cylindrical portion 9 into the inside, and is filtered by the filter 20 to flow from the through hole 18 of the partition plate 19 to the float chamber. Enter in 17.

Next, the venting of the air that has entered the float chamber 17 will be briefly described. When the amount of water or liquid (hereinafter, referred to as water) entering the float chamber 17 is small, the float valve 21 is hardly lifted and air is discharged to the outside through the exhaust port 24 and the auxiliary exhaust port 26. When more water than air flows into the float chamber 17, the float valve 21 gradually rises, and the inclination of the float valve 21 cantilevered by the guide rod 23 blocks the exhaust port 24 and the auxiliary exhaust port. Air is released only from 26. When the air is almost completely discharged, the auxiliary exhaust port 26 is also closed by the floating valve body 27, and the exhaust action ends. Next, when the air is continuously introduced into the float chamber 17, the air is not released to the outside, so the float valve 21 starts to descend and the air is released from the exhaust port 24. Further, when the air in the float chamber 17 has a negative pressure, the floating valve body 27 is opened and exhausted from the auxiliary exhaust port 26. As described above, efficient exhaust is performed.

In the above description, the detailed structure of each component is not limited to that shown in the drawings. As for the structure of the filter 20 and the like provided on the partition plate 19, for example, the structure shown in FIG. 3 can be cited as another embodiment. That is, a plurality of (four in the figure) filter holes 31 are formed through the partition plate 19, and the filters 32 are fixed to the respective filter holes 31. With the above-mentioned structure, almost the same filtration as that of the above-mentioned embodiment is performed. In addition, the air venting device of the present invention has a cold resistance because a part of the air venting device is housed in the pipe body, thus providing safety protection and reducing the installation height.

[0018]

[Effect of device]

 According to the present invention, the following remarkable effects are obtained. 1) Since the air valve and the on-off valve are integrally formed, it is not necessary to provide the on-off valve at a high position as in the prior art. Thereby, the equipment cost can be reduced. 2) Even if the air valve is removed for maintenance or repair, the opening of the pipeline is closed by the on-off valve, so maintenance work can be performed easily and efficiently. 3) The opening / closing of the on-off valve is automatically performed in synchronization with the attachment / detachment of the air valve. This eliminates the need for complicated manual operation to open and close the valve. 4) The air valve and the on-off valve are assembled in an integrated structure, so they are easy to handle and are compact in size. Is also easy. 5) The on-off valve is a built-in type and is stored in the opening of the pipeline so that it does not get in the way.

[Brief description of drawings]

FIG. 1 is an axial sectional view showing the overall structure of an embodiment of the present invention.

FIG. 2 is a partial axial sectional view for explaining the attachment / detachment of the air valve and the opening / closing operation of the opening / closing valve of the present embodiment.

FIG. 3 is a plan view showing another embodiment of the filter provided on the partition plate.

FIG. 4 is an axial cross-sectional view showing an outline of a conventional arrangement state of air valves.

FIG. 5 is an axial sectional view showing an example of a conventional air valve.

FIG. 6 is an explanatory diagram illustrating a problem in a conventional air valve.

[Explanation of symbols]

 1 Air Venting Device with Built-in Opening / Closing Valve 2 Adapter 3 Opening / Closing Valve 4 Air Valve 5 Spring 6 Seat Surface 7 Air Venting Hole 8 Opening / Closing Plate 9 Hollow Cylindrical Part 9a Communication Hole 10 Tubing 11 Opening 12 Boss 13 Opening / Closing Main Body 13a Bottom 13b Packing 14 Communication Hole 15 Valve Box 16 Outer Screw Part 17 Float Chamber 18 Through Hole 19 Partition Plate 20 Filter 21 Float Valve 22 Upper Lid 23 Guide Rod 24 Exhaust Port 25 Exhaust Portion 26 Auxiliary Exhaust Port 27 Floating Valve Body 28 Auxiliary Exhaust Portion 29 Gap 30 cover 31 filter hole 32 filter

Claims (2)

[Scope of utility model registration request] 1. A device for removably attaching to an opening in the middle of a pipeline to remove air from the pipeline,
An open / close valve that is fixedly attached to the conduit side to slidably support the open / close plate of the air vent hole provided on the opening side, and a hollow cylinder inserted into the air vent hole to press the open / close plate in the opening direction. An air valve that has a portion and is detachably attached to the opening side, an urging unit that urges the opening / closing plate to press the hollow cylindrical portion side, and the conduit when the air valve is attached. A valve box integrally forming a hollow chamber and a float chamber communicating with the hollow cylinder portion; and a float valve floating in the valve box. An air vent device with a built-in on-off valve, comprising an exhaust port that opens and closes as the float valve moves up and down. 2. The on-off valve built-in type air bleeder according to claim 1, wherein the on-off valve is housed and disposed at least in the opening.