JP5683929B2 - Vacuum valve structure - Google Patents

Description

  The present invention relates to a vacuum valve structure used in a vacuum sewer system.

  It has already been performed to use a vacuum sewer system instead of a natural flow sewer system. This vacuum sewer system uses a vacuum pressure to suck and collect a certain amount of sewage collected in a sewage tank.

  FIG. 4 shows a vacuum valve unit 2 which is a main part of the vacuum sewer system 1.

  In the vacuum sewer system 1, sewage discharged from a building or the like is temporarily stored in the vacuum valve unit 2 under natural flow through the sewage inflow pipe 3. When the sewage in the vacuum valve unit 2 reaches a certain amount, the sewage is transferred to a water collection tank of a downstream vacuum station (not shown) by a vacuum pressure through a vacuum sewage pipe 4 connected to the vacuum valve unit 2. The

  At this time, ground air can be introduced into the vacuum valve unit 2 from the outside through the vent pipe 5, and the sewage and the air from the vent pipe 5 are sequentially sucked by the vacuum pressure described above. (Refer to the gas-liquid separation suction method, Patent Document 1).

  Then, the sucked sewage is conveyed to the above-described water collection tank as a gas-liquid mixed flow using the pressure difference between the vacuum pressure in front of the sewage and the suction air pressure behind the sewage.

  The vacuum valve unit 2 described above includes a sewage tank 6 that temporarily stores the sewage from the sewage inflow pipe 3 described above. The sewage in the sewage tub 6 is sucked into the vacuum sewage pipe 4 through the sewage suction pipe 7. A vacuum valve 8 that can be opened and closed using vacuum pressure is provided between the sewage suction pipe 7 and the vacuum sewage pipe 4. Between the vacuum valve 8 and the vacuum sewage pipe 4, a vacuum valve 8, etc. During maintenance, a gate valve 9 for partitioning the vacuum valve 8 and the vacuum sewage pipe 4 is provided.

  The vacuum valve unit 2 also includes a liquid level detection tube 11 capable of detecting the liquid level of the sewage inside the sewage tub 6.

  FIG. 5 shows the details of the vacuum valve 8 described above.

  The vacuum valve 8 includes a connecting pipe part 12 through which dirty water can flow, a valve part 13 provided inside the connecting pipe part 12 to open and close the connecting pipe part 12, and an open / close drive of the valve part 13 And a valve drive unit 14.

  Here, the connecting pipe portion 12 has a short tubular shape in which the diameter of the inner and outer diameters is substantially constant and extends substantially in the horizontal direction. The connecting pipe portion 12 is connected between the sewage suction pipe 7 and the gate valve 9 so as to guide the sewage sucked from the sewage suction pipe 7 to the vacuum sewage pipe 4 through the gate valve 9. It has become.

  The valve portion 13 includes a valve seat 15 formed on the inner surface of the connecting pipe portion 12, and a valve body 16 disposed so as to be in contact with and away from the valve seat 15. Further, a short tubular valve body passage portion 17 that becomes a space in which the valve body 16 moves when the valve body 16 contacts and separates from the valve seat 15 is branched near the upstream side of the valve seat 15 of the connecting pipe portion 12. Is formed. The connecting pipe portion 12 is closed when the valve body 16 is seated on the valve seat 15, and the connecting pipe portion 12 is opened when the valve body 16 leaves the valve seat 15 and retreats into the valve body passage portion 17. It has become.

  The valve drive unit 14 includes a cylinder-shaped main body casing 18 and a piston 19 with a diaphragm provided in the main body casing 18 so as to be movable in the axial direction. The main casing 18 is installed at the upper end of the valve body passage portion 17 in the drawing. The above-described valve body 16 is connected to a piston 19 with a diaphragm through a valve rod 21 so as to be integrally movable. The valve stem 21 is disposed coaxially in the valve body passage portion 17 described above.

  A biasing means 22 such as a coil spring is interposed in the working chamber on the head side of the main body casing 18, and the piston 19 with a diaphragm seats the valve body 16 on the valve seat 15 by the biasing means 22. Always energized in the direction. A valve control unit 23 for applying a vacuum pressure to the head-side working chamber is attached to the upper end of the main casing 18 in the figure. The valve controller 23 is supplied with a vacuum pressure applied to the vacuum sewage pipe 4 via a vacuum hose 24.

  With such a configuration, the piston 19 with the diaphragm moves to the valve body passage portion 17 side mainly by the urging force of the urging means 22, so that the valve body 16 is seated on the valve seat 15 and the valve portion 13 is moved. It is normally closed. When a vacuum pressure is applied to the head-side working chamber by the valve control unit 23, the diaphragm-equipped piston 19 moves to the head side against the urging force of the urging means 22, whereby the valve body 16 is moved. Is separated from the valve seat 15, the valve portion 13 is opened, and the sewage is sucked by vacuum.

  In such a vacuum valve 8, in general, the valve drive unit 14 is provided on the upper side of the connection pipe unit 12 and is inclined obliquely toward the upstream side (the sewage suction pipe 7 side). In response to this, the above-described valve portion 13 is also provided in an inclined state in the same manner as the valve driving portion 14 with respect to the connecting pipe portion 12. The inclination angle of the valve drive unit 14 and the valve unit 13 is normally about 45 °.

  As described above, when vacuuming the sewage, it is necessary to suck in air. And sewage is conveyed as a gas-liquid mixed flow using the pressure difference of the front vacuum pressure and the back suction air pressure. In addition to the above-described gas-liquid separation and suction method that separates and sucks air after suction of sewage as described above, this air suction method includes a gas-liquid simultaneous suction method that sucks air simultaneously with sewage (Patent Document) 2), both of them coexist, and both suction systems have their merits and demerits.

  In the case of the gas-liquid separation and suction method as described above, the vent pipe 5 is connected to the sewage tank 6, but in the case of the gas-liquid simultaneous suction method, it is shown in FIG. As described above, the vent pipe (the air suction pipe 1 of Patent Document 2) is provided so as to branch from the tip of the sewage suction pipe (the sewage suction pipe 2 of Patent Document 2) and rise upward.

Japanese Patent Publication No. 7-109568 (gas-liquid separation suction system) Japanese Patent No. 2588076 (gas-liquid simultaneous suction method)

  About 20 years have passed since the above-described vacuum sewer system has been used in Japan, and in recent years, demand for renewal of vacuum valves has begun to occur. However, as described above, the air suction system of the vacuum sewer system has two systems, the gas-liquid separation suction system and the gas-liquid simultaneous suction system, and the structures are different. Since it is necessary to replace the sewage suction pipe at the time of renewal or the like, it is uneconomical to change to a different air suction system.

  For example, when the gas-liquid separation and suction type vacuum valve is replaced to realize the gas-liquid simultaneous suction method, it is necessary to replace the sewage suction pipe with an air suction pipe at the same time.

In order to solve the above-mentioned problems, the present invention has a valve seat inside, a connecting pipe portion connected in the middle of a vacuum sewage pipe, and a valve body supported so as to be able to come into contact with and separate from the valve seat. In a vacuum valve structure provided with a valve drive unit that
In the connection pipe part, an air suction system switching part that can switch the air suction system to the vacuum sewage pipe to either the gas-liquid simultaneous suction system or the gas-liquid separation and suction system is provided ,
The air suction method switching unit has at least an air intake port provided at a portion upstream of the valve seat of the connection pipe unit, and an on-off valve or a flow rate control valve connected to the air intake port. With
The air intake port is provided on a side surface of the connecting pipe portion, and the flow rate control valve includes a handle portion that can be manually operated .

According to the present invention, the following effects can be obtained by the above-described configuration. That is, by providing an air suction method switching unit in the connecting pipe portion, it is possible to cope with the air suction method by switching to either the gas-liquid simultaneous suction method or the gas-liquid separation suction method.
More specifically, by opening an on-off valve or a flow rate adjusting valve provided in the vacuum valve, air can be taken in from a portion upstream of the valve seat of the connecting pipe portion through the air intake port. . Thereby, it can be set as a gas-liquid simultaneous suction system.
On the other hand, by closing the on-off valve or flow control valve provided on the vacuum valve, air should not be taken in from the upstream side of the valve seat of the connecting pipe through the air intake port. Can do. Thereby, it can be set as a gas-liquid separation suction system.
And since the air intake port is provided on the side surface of the connecting pipe part, it is possible to attach an on-off valve or a flow rate adjusting valve to the connecting pipe part while avoiding interference with the valve driving part. Further, since the flow rate control valve includes the handle portion, the on-off valve or the flow rate control valve can be manually operated.

It is sectional drawing of the vacuum valve provided with the air intake opening concerning the Example of this invention. It is sectional drawing of the vacuum valve which shows the state which attached the on-off valve or the flow control valve so that it might become sideways with respect to the air intake of FIG. It is sectional drawing of the vacuum valve which shows the state which attached the on-off valve or the flow control valve so that it might become vertical with respect to the air intake of FIG. It is a figure which shows the principal part of the vacuum-type sewer system used for description of the prior art example (gas-liquid separation suction system). It is sectional drawing of the vacuum valve of FIG.

  In order to solve the above-described problems, the present invention has a configuration that can cope with the air suction method by simply switching to either the gas-liquid simultaneous suction method or the gas-liquid separation suction method. is there.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below in detail with reference to the drawings.

  <Configuration> The configuration will be described below.

  1 to 3 show this embodiment and its modifications.

  Since the structure of the vacuum sewer system and the vacuum valve is basically the same as that shown in FIGS. 4 and 5, description thereof is omitted here. However, if necessary, the above description can be used as the description in this column.

  And the thing of this Example is provided with the following characteristics with respect to the above-mentioned basic composition.

  (1) Air suction method switching unit 31 that can switch the suction method of air into the vacuum sewage pipe 4 to either the gas-liquid simultaneous suction method or the gas-liquid separation and suction method with respect to the connection pipe portion 12 of the vacuum valve 8. To be provided.

  (2) The air intake system switching unit 31 described above is provided with an air intake port 32 (see FIG. 1) provided at least on the upstream side (sewage suction pipe 7 side) of the valve seat 15 of the connecting pipe part 12. And an open / close valve or a flow control valve 33 (see FIG. 2 or 3) connected to the air intake port 32.

  Here, as shown in FIG. 1, the air intake port 32 is provided on the side surface of the connecting pipe portion 12 so that the on-off valve or the flow rate adjusting valve 33 can be attached while avoiding interference with the valve driving portion 14. Is preferred.

  As shown in FIG. 2 or FIG. 3, the on-off valve or flow control valve 33 takes air by opening or closing the air intake port 32 or adjusting the opening degree in the vicinity of the air intake port 32. Can be included. This on-off valve or flow control valve 33 is provided with a handle portion 34 that can be manually operated.

  Then, as shown in FIG. 2, the on-off valve or the flow rate adjustment valve 33 can be attached sideways with respect to the air intake port 32. Alternatively, as shown in FIG. 3, the on-off valve or the flow rate adjusting valve 33 can be attached to the air intake port 32 in a vertical direction via a direction changing connecting pipe member 35. In this case, the direction changing connecting pipe member 35 is a short bent pipe member having a horizontal portion and a vertical portion.

  Here, in the case of the gas-liquid simultaneous suction method, the opening / closing valve or the flow rate adjustment valve 33 may be adjusted to an appropriate gas-liquid ratio to open the other end, An intake vent pipe 5 of FIG. 4 may be connected.

When the gas-liquid separation and suction method is used, the on-off valve or the flow rate adjustment valve 33 may be closed.
In addition, you may make it the structure which connects the air intake port 32 and the on-off valve or the flow control valve 33 so that isolation | separation coupling is possible with a union nut etc. In this way, when a foreign object is caught in the valve seat, it is possible to remove the foreign object by inserting a hand from the air intake port 32, which is advantageous in terms of maintenance.

  <Effect> According to this embodiment, the following effects can be obtained.

(Operation effect 1)
By providing the air suction method switching unit 31 in the connection pipe portion 12 of the vacuum valve 8, it is possible to cope with the problem by simply switching the air suction method to either the gas-liquid simultaneous suction method or the gas-liquid separation suction method. . Therefore, the air suction method can be freely selected without changing the structure of the sewage suction pipe 7 only by using the vacuum valve 8 having the air suction method switching unit 31. Therefore, when the vacuum valve 8 is updated, it is possible to cope with the air suction method by switching to either the gas-liquid simultaneous suction method or the gas-liquid separation suction method.

(Operation effect 2)
More specifically, by opening the on-off valve or flow rate adjusting valve 33 provided in the vacuum valve 8, air is supplied from the upstream side of the valve seat 15 of the connecting pipe portion 12 through the air intake port 32. Can be captured. Thereby, it can be set as a gas-liquid simultaneous suction system.

  On the contrary, by closing the on-off valve or the flow rate adjusting valve 33 provided in the vacuum valve 8, air is taken in from the portion upstream of the valve seat 15 of the connecting pipe portion 12 through the air intake port 32. Can not be. Thereby, it can be set as a gas-liquid separation suction system.

  Although the embodiments of the present invention have been described in detail with reference to the drawings, the embodiments are only examples of the present invention, and the present invention is not limited to the configurations of the embodiments. Needless to say, design changes and the like within a range not departing from the gist of the invention are included in the present invention. Further, for example, when each embodiment includes a plurality of configurations, it is a matter of course that possible combinations of these configurations are included even if not specifically described. Further, when a plurality of embodiments and modifications are shown, it is needless to say that possible combinations of configurations extending over these are included even if not specifically described. Further, the configuration depicted in the drawings is of course included even if not particularly described. Further, when there is a term of “etc.”, it is used in the sense that the equivalent is included. In addition, when there are terms such as “almost”, “about”, “degree”, etc., they are used in the sense that they include those in the range and accuracy recognized by common sense.

4 Vacuum sewer pipe 12 Connection pipe part 14 Valve drive part 15 Valve seat 16 Valve body 31 Air suction system switching part 32 Air intake port 33 On-off valve or flow control valve

Claims (2)

A connecting pipe part having a valve seat inside and connected in the middle of the vacuum sewage pipe;
In a vacuum valve structure comprising a valve drive unit that supports a valve body so as to be able to come into contact with and separate from the valve seat,
In the connection pipe part, an air suction system switching part that can switch the air suction system to the vacuum sewage pipe to either the gas-liquid simultaneous suction system or the gas-liquid separation and suction system is provided ,
The air suction method switching unit has at least an air intake port provided at a portion upstream of the valve seat of the connection pipe unit, and an on-off valve or a flow rate control valve connected to the air intake port. With
The vacuum valve structure , wherein the air intake port is provided on a side surface of the connecting pipe portion, and the flow rate control valve includes a handle portion that can be manually operated . 2. The vacuum valve structure according to claim 1, wherein the air intake port and the flow rate control valve are connected so as to be separable .