JPH07279222A - Drainage device in air-communication pipe of vacuum valve - Google Patents

Abstract

PURPOSE:To prevent the incursion of water into a vacuum valve and to stabilize operation of the vacuum valve even if water abnormally enters an inlet pipe communicating with the vacuum valve. CONSTITUTION:In a drainage device in an air-communication pipe of a vacuum valve 2 provided to a soil chamber 1 of a vacuum sewage and operated by air supplied from an air communication pipe 43, a water pool is provided in the middle course of an air inlet course extend to the vacuum valve 2 from the air communication pipe 43. A drain inlet provided to the bottom of the water pool is opened in the soil chamber 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage device for an atmosphere communicating pipe of a vacuum valve which constitutes a vacuum sewer.

[0002]

2. Description of the Related Art As shown in FIG. 18, a vacuum sewer system allows sewage from households to flow into a sewage tank 1 with a vacuum valve.
When the quantity reaches a certain amount, the vacuum valve 2 is opened, and the dirty water is sucked into the vacuum sewer pipe 5 whose pressure is reduced by the vacuum pump 4 installed in the vacuum station 3. Then, this sewage is conveyed to the water collection tank 6 and is pressure-fed by the pressure feed pump 7 to the free-flowing type sewer.

At this time, the vacuum valve 2 opens and closes the connecting portion between the sewage suction pipe 1A communicating with the sewage tank 1 and the vacuum sewage pipe 5, so that the sewage tank 1 has a constant sewage level. When it becomes, it operates to open the above contact.
And, the vacuum valve 2 is (a) the sewage level of the sewage masu 1,
(b) The vacuum pressure of the vacuum sewer pipe 5 and (c) the atmospheric pressure are introduced to enable operation.

For this reason, in the vacuum sewer system, an atmosphere communication pipe (breather pipe) 8 for introducing the atmosphere for operating the vacuum valve 2 is set up on the ground. In addition, in the vacuum sewer,
A ventilation pipe 9 is also provided in the upper space of the sewage mist 1 so that the atmosphere for pressurizing the sewage can be introduced.

However, the atmosphere communicating pipe 8 is guided to the operating portion of the vacuum valve 2, and it is necessary to completely prevent the intrusion of water that causes the defective operation. In the prior art, as described in Japanese Patent Laid-Open No. 3-183833, the atmosphere communication pipe 8
Through the ventilation pipe 9 to rise to the ground, and by providing a cap 9A (FIG. 19) and a ceiling portion 9B (FIG. 20) at the ground end opening of the ventilation pipe 9, the water to the atmosphere communication pipe 8 is supplied. It is intended to prevent the intrusion of

[0006]

In the prior art, it is possible to prevent normal infiltration of water into the atmosphere communication pipe 8, but
It is difficult or impossible to prevent the ingress of water.

Since the ground air intake of the air communication pipe 8 is installed on the roadside or on the premises of a house, in case of mischief of a child, water splash due to traffic of a car, etc. .

The hot air filled in the ventilation pipe 9 due to high-temperature sewage from home condenses on the inner surfaces of the shade 9A and the ceiling 9B, and this condensed water drips from the shade 9A and the ceiling 9B and travels on the wall surface. That penetrates into the atmosphere communication pipe 8.

When the outside air temperature is higher than the soil temperature, such as in the evening to midnight, infiltration of water that condenses on the inner surface of the atmosphere communication pipe 8 in the process of the warm air passing through the atmosphere communication pipe 8 which is cooled by the soil temperature. .

When the amount of water vapor in the atmosphere is large, such as in the summer,
Infiltration of water from the water vapor in the atmosphere that condenses on the inner surface of the atmosphere communication pipe 8.

When abnormal water infiltration occurs due to the above-mentioned items 1 to 4, the atmosphere communication pipe 8 is closed up to the connection portion with the vacuum valve, so that the atmosphere is introduced into the operating portion of the vacuum valve. At the same time, the water always flows in, causing malfunction of the vacuum valve.

The present invention prevents the water from flowing into the vacuum valve and stabilizes the operation of the vacuum valve even if abnormal water enters the atmosphere introducing pipe communicating with the vacuum valve. To aim.

[0013]

[Means for Solving the Problems] The present invention according to claim 1 is installed in a sewage masu with a vacuum valve of a vacuum sewer, and is operated by being provided with an atmosphere introduced by an atmosphere communication pipe to the sewage masu. In the atmospheric communication pipe drainage device of the vacuum valve that can open and close the communication part between the communicating sewage suction pipe and the vacuum sewer pipe communicating with the vacuum source, in the atmospheric introduction pipe extending from the atmospheric communication pipe to the vacuum valve. A water reservoir is provided on the way, and the drain port provided at the bottom of this water reservoir is opened to the sewage tank.At the top of this water reservoir is provided an atmosphere communication port that communicates with the vacuum valve side. A float valve that floats up due to the rise of the water level in the water reservoir and closes the atmosphere communication port is provided at the upper atmosphere communication port.

The present invention according to claim 2 is installed in a sewage tank with a vacuum valve for a vacuum sewer, and an sewage suction pipe communicating with the sewage tank is operated by being given an atmosphere introduced by an air communication tube. In the atmospheric communication pipe drainage device of the vacuum valve that can open and close the communication part with the vacuum sewer pipe that communicates with the vacuum source, a water reservoir part is provided in the middle of the atmosphere introduction path extending from the atmospheric communication pipe to the vacuum valve. A drain port provided at the bottom of the water reservoir is communicated with a waste water suction pipe, and an atmosphere communication port communicating with the vacuum valve side is provided at an upper portion of the water reservoir.

According to a third aspect of the present invention, in addition to the second aspect of the present invention, a water reflection plate is provided above the water reservoir and below the atmosphere communication port. is there.

The present invention according to claim 4 provides the invention according to claims 1 to 3.
In any one of the present inventions, the atmosphere communication pipe is heat-insulated and the atmosphere intake is directed vertically downward.

[0017]

According to the present invention as set forth in claim 1, the following effects are obtained. In order to prevent water from entering the vacuum valve even if there is abnormal water intrusion into the atmosphere communication pipe, separate the infiltrated water in the middle of the air communication pipe and send only the atmosphere to the vacuum valve. You can do it. This means that infiltration water is trapped in the water reservoir, and this water is allowed to escape from the drainage port at the bottom of the water reservoir to sewage, and the atmosphere is communicated with the vacuum valve from the air communication port above the water reservoir. It is achieved by

Normal infiltrated water does not reach the atmosphere communication port above the water reservoir. However, when a large amount of infiltrated water is generated and this infiltrated water reaches the atmosphere communication port above the water reservoir, the float valve that floats in the water reservoir closes the atmosphere communication port, Prevent it from flowing into the vacuum valve.
If the vacuum valve abnormally operates and remains open while the air communication port is closed by the float valve, the vacuum force of the vacuum sewer pipe collects water through the space of the dirty water. Because it continues to reach the drainage port of the section and sucks and discharges the infiltrated water in the water reservoir at the same time, the air communication port is opened again after the infiltration water is completely discharged, the atmosphere communication pipe is restored, and the vacuum valve operates. Returns to normal.

When the vacuum supply from the vacuum station is stopped due to a power failure or the like, and the sewage is no longer suctioned due to the vacuum force of the vacuum sewer pipe, the sewage is filled with sewage and the sewage is filled with water. It is also conceivable that the water will flow backward from the lower drainage port of the reservoir and enter the water reservoir. The operation of the vacuum valve is not inconvenient even in this case. That is, in this case, as in the case described above, the float valve in the water reservoir rises as the water level of the filled sewage rises to close the atmosphere communication port and prevent this sewage from flowing into the vacuum valve. When the vacuum supply returns to normal due to the restoration of the power source, etc., the wastewater in the wastewater mist is carried out through the vacuum valve, and the water level in the water sump part drops as well as the level of the wastewater masu returns to normal.

According to the second aspect of the present invention, there are the following effects. In order to prevent water from entering the vacuum valve even if there is abnormal water intrusion into the atmosphere communication pipe, separate the infiltrated water in the middle of the air communication pipe and send only the atmosphere to the vacuum valve. You can do it. This means that infiltration water is captured in the water reservoir, and this water is released from the drainage port at the bottom of the water reservoir to the sewage intake pipe of the sewage mist, while the atmosphere is transferred from the air communication port at the top of the water reservoir to the vacuum valve. It is achieved by making it common.

The waste water suction pipe connected to the drain port at the bottom of the water reservoir is at atmospheric pressure except when the vacuum valve is opened,
When the vacuum valve is opened, it is sucked by the vacuum force of the vacuum sewer pipe to a negative pressure. Therefore, the infiltrated water in the water reservoir is sucked by this negative pressure and discharged together with the waste water from the waste water suction pipe.

At this time, generally, the water previously accumulated in the water reservoir is not drawn when the vacuum valve is opened. That is, since the infiltration water such as dew condensation in the atmosphere communication pipe usually moves with the flow of the atmosphere in the atmosphere communication pipe when the vacuum valve is opened, the water droplets of the infiltration water are almost simultaneously accumulated in the water reservoir. It will be sucked into the dirty water suction pipe. In any case, the infiltration of water into the vacuum valve from the air communication pipe is not seen.

In this case, since the sewage suction pipe is communicated with the water reservoir provided in the middle of the atmosphere communication pipe, the vacuum pressure of the vacuum sewer pipe is always connected to the atmosphere communication pipe when the vacuum valve is opened. Will work. Therefore, it is necessary to prevent this vacuum pressure from adversely affecting the introduction of atmospheric pressure into the vacuum valve by the atmosphere communication pipe. However, in general, the inner diameter of the atmosphere communicating pipe is large enough to secure the amount of air introduced to operate the vacuum valve, and the above-described adverse effect does not occur. Then, by making the inner diameter of the drainage pipe for communicating the dirty water suction pipe to the water reservoir part as small as possible, or by making it possible to reduce and adjust the vacuum pressure acting on the atmosphere communication pipe by the throttle valve provided in this drainage pipe, The above adverse effects can be suppressed to a negligible level.

The present invention according to claim 3 has the following effects. Since a water reflector is provided above the water reservoir below the atmosphere communication port, the water entering from the atmosphere communication pipe to the water reservoir can be reliably captured in the water reservoir, and the atmosphere communication port can enter the vacuum valve side. Water can be surely prevented from entering.

According to the present invention described in claim 4, there is the following action. By heat-insulating the atmosphere communication pipe, the temperature difference between the inside and outside of the atmosphere communication pipe can be reduced, and abnormal infiltration of water due to the occurrence of dew condensation on the inner surface of the pipe can be prevented. Further, by orienting the air inlet of the atmosphere communication pipe vertically downward, the safety factor that can prevent abnormal water intrusion into the atmosphere communication pipe is increased, and abnormal water infiltration can be reduced as much as possible.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic diagram showing a wastewater tank to which the first embodiment of the present invention is applied, FIG. 2 is a schematic diagram showing a vacuum valve, FIG. 3 is a sectional view showing a control part of the vacuum valve, and FIG. 4 is another cross-sectional view showing the control part of the vacuum valve, FIG. 5 is a schematic view showing a main part of the first embodiment, FIG. 6 is a schematic view showing a water reservoir part of the first embodiment, and FIG.
Is a schematic diagram showing a modified example of the water reservoir, FIG. 8 is a schematic diagram showing another modified example of the water reservoir, and FIG. 9 is a schematic diagram showing a wastewater basin to which the second embodiment of the present invention is applied. FIG. 10 is a schematic view showing a main part of the second embodiment, FIG. 11 is a schematic view showing a throttle valve provided in a drain pipe connected to the water reservoir, and FIG. 12 is a schematic view showing a water reservoir of the second embodiment. FIG. 13 is a schematic view showing a modified example of the water reservoir, FIG. 14 is a schematic view showing another modified example of the water reservoir, and FIG. 15 is a schematic view showing an atmosphere communication pipe covered with heat insulation.
FIG. 16 is a schematic diagram showing an example in which the atmosphere inlet of the atmosphere communicating pipe is U-shaped, FIG. 17 is a schematic diagram showing an example in which a cap is provided at the atmosphere inlet of the atmosphere communicating pipe, and FIG. 18 is a vacuum sewer system. Pattern diagram,
FIG. 19 is a schematic diagram showing a water infiltration state of the atmosphere communication pipe, FIG.
[Fig. 6] is a schematic view showing another water infiltration state of the atmosphere communication pipe.

(First Embodiment) (FIGS. 1 to 8) The vacuum sewer system is constructed as shown in FIG. 18 described above, and a vacuum valve 2 is installed in a dirty water column 1. And the vacuum valve 2 is
It is possible to open and close the communication part (communication path 28) between the sewage suction pipe 1A that communicates with the sewage masu 1 and the vacuum sewer pipe 5 that communicates with the vacuum source by operating by being supplied with the atmosphere introduced by the atmosphere communication pipe 8. To do.

That is, the sewage discharged from each home or the like flows into the sewage masu 1 from the sewage inflow pipe 10 of the natural flow type.
Then, when a predetermined amount of dirty water is accumulated in the dirty water tank 1, the vacuum valve 2
The sewage in the sewage tank 1 is sucked through the sewage suction pipe 1A. Then, this sewage is sucked into the vacuum sewer pipe 5 through the vacuum valve 2, collected in the water collection tank 6 of the vacuum pump station, and then sent to the sewage treatment plant or the like by the pressure pump 7.

The vacuum valve 2 is a first valve as shown in FIGS.
And the second housings 21 and 22 with the band clamp 23
The main valve 24, the valve working chamber 25, the closing force imparting spring 26, and the control unit 27 are integrated.

The main valve 24 opens and closes a connecting passage 28 which constitutes a connecting portion between the sewage suction pipe 1A and the vacuum sewer pipe 5.

The valve working chamber 25 slidably accommodates a cup-shaped plunger 30 connected to the main valve 24 via a valve rod 29.

The closing force applying spring 26 is built in the chamber above the plunger 30 of the valve operating chamber 25 and exerts a spring force on the plunger 30 to apply a closing force to the main valve 24.

The control unit 27 applies a vacuum pressure to the valve working chamber 25 and an opening force to the main valve 24 when the level of the sewage in the sewage tank 1 rises, and opens the vacuum valve 2 to open the sewage suction pipe 1A. Then, the vacuum sewer pipe 5 is electrically connected.

Therefore, the control unit 27 of the vacuum valve 2 is constructed as follows. That is, the control unit 27 controls
As shown in FIG. 5, the first to fifth cases 31 to 35 are integrally formed, and the fourth case 34 is integrated with the second housing 22 of the vacuum valve 2 by the band clamp 36.

The control unit 27 has a liquid level detection pipe connection port 39 to which a liquid level detection pipe 37 communicating with the dirty water tank 1 is connected via a hose 38. Liquid level detection tube connection port 3
9 is provided in the connection port case 40 joined to the first case 31.

Further, the control unit 27 has the vacuum pressure port 42 to which the vacuum sewer pipe 5 is connected via the hose 41 in the third case 3.
It is provided in 3.

The control unit 27 also sets the atmospheric pressure port 45, to which the atmosphere communication pipe 8 is connected via the hose 44, to the third case 3.
It is provided in 3.

The atmosphere communication pipe 8 is connected via a hose 46 to
The valve working chamber 25 is communicated with the lower chamber than the plunger 30 (see FIG. 2). At this time, the chamber below the plunger 30 of the valve operating chamber 25 is formed by the lower chamber housing 47 that is sandwiched between the first and second housings 21 and 22 of the vacuum valve 2. Check valve 4
8 is provided, and a check valve cover 49 is joined around the valve rod 29 penetrating portion of the lower chamber housing 47.

The control unit 27 also arranges the first and second two diaphragms 51 and 52 side by side in the operating direction of the control valve 68 described later.

The first diaphragm 51 is disposed between the mating surfaces of the first case 31 and the second case 32, and the liquid level detecting pipe connection port 39 communicates with the diaphragm 53 through the orifice 53A of the diaphragm 53. 54 and the communication passage 55 in which the atmospheric pressure port 45 is provided in the second case 32 and the third case 33.
And an atmosphere communication chamber 56 that communicates with each other.
A stem 58 covered by a covering portion 57 is fixed to the central portion of the first diaphragm 51.
A spring 60 is interposed between the head portion of the and the spring receiving plate 59 joined to the first case 31.

The second diaphragm 52 is disposed between the mating surfaces of the second case 32 and the third case 33, and the liquid level detecting pipe connection port 39 is provided in the liquid level detecting pipe communicating chamber 54 of the first diaphragm 51.
A liquid level detection pipe communication chamber 62 that communicates with each other via a communication path 61 provided in the first case 31 and the second case 32 and an atmospheric pressure communication chamber 63 that communicates with the atmospheric pressure port 45 are partitioned. In addition, a covering portion 64 is provided at the center of the second diaphragm 52.
The stem 65 covered with is fixed, and a spring 67 is interposed between the head of the stem 65 and the spring receiving plate 66 joined to the second case 32.

The stem 58 of the first diaphragm 51 and the second
It is coaxially arranged with the stem 65 of the diaphragm 52 and can transmit the mutual axial forces.

The control unit 27 also includes a control valve 68. The control valve 68 connects the valve seat 70A of the vacuum passage 70, which communicates with the upper chamber of the valve working chamber 25, through the communication port 69 provided in the fifth case 35 to the atmospheric pressure port 45. The valve seat 71A of the atmosphere passage 71, which communicates with the upper chamber of the valve working chamber 25 through the port 69, is alternately opened and closed. The valve seat 70A of the vacuum passage 70 is provided in the fourth case 34, the valve seat 71A of the atmosphere passage 71 is provided in the fifth case 35, and both valve seats 70A, 71A face each other. Then, the control unit 27 transmits the displacements of the diaphragms 51 and 52 directly to the control valve 68 so that the valve stem 68A of the control valve 68 is transmitted.
Is coaxially arranged with the stem 65 of the second diaphragm 52,
The mutual axial forces can be transmitted.

The valve rod 68A of the control valve 68 has a covering portion 72.
Is covered with the head of the valve rod 68A and the third case 33.
The spring 7 is connected between the spring receiving plate 73 and the spring receiving plate 73.
4 is installed.

At this time, each of the first and second diaphragms 5
The displacement force of 1, 52 is the stem 5 of the first diaphragm 51.
8, the stem 65 of the second diaphragm 52, and the control valve 6
By the transmission of the axial force among the three valve rods 68A of No. 8, they are repeatedly applied to the control valve 68.

In the control section 27, a part of the atmosphere passage 71 is formed in the fifth case 35, but the fifth case 35 has a plug 75 for closing the processing hole of the atmosphere passage 71. 76 are joined.

Therefore, the control unit 27 of the vacuum valve 2 operates as follows. (1) When the level of the sewage in the sewage tank 1 rises, the pressurized air in the sewage tank 1 passes through the liquid level detection tube 37 from the liquid level detection tube connection port through the orifice 53A of the diaphragm 53 to each diaphragm 51, Liquid level detection pipe communication chamber 5 above 52
Acts on 4, 62. At this time, each diaphragm 51,
The atmosphere communication chambers 56 and 63 on the lower side of 52 are opened to the atmosphere via the atmosphere communication pipe 8 and the atmospheric pressure port 45. Therefore, a pressure difference is generated between both side chambers of the diaphragms 51 and 52, and the diaphragms 51 and 52 are displaced downward.

(2) The downward displacement force of each diaphragm 51, 52 is transmitted through the stems 58, 65 of the control valve 6
8 acting on the valve stem 68A of 8 and pushes down the control valve 68.

The downward force of the control valve 68 acts as a downward displacement force of both diaphragms 51 and 52, and is twice the downward displacement force of each diaphragm 51 and 52 alone.

(3) By depressing the control valve 68, the valve seat 71A of the atmosphere passage 71 is closed, and the effect of the atmospheric pressure on the valve working chamber 25 disappears. At the same time, the valve seat 7 of the vacuum passage 70
0A opens, and the vacuum pressure acts on the valve working chamber 25. As a result, the plunger 30 of the vacuum valve 2 is closed by the closing force applying spring 26.
As a result of the upward movement of the main valve 24 against the spring force of
The vacuum suction force of the vacuum sewage pipe 5 acts on the sewage suction pipe 1A of the sewage masu 1, and the waste water in the sewage masu 1 is discharged to the vacuum sewage pipe 5.

(4) The level of sewage in sewage masu 1 is lowered,
When the pressure difference between the two chambers of the diaphragms 51 and 52 disappears, the control valve 68 returns upward, closes the valve seat 70A of the vacuum passage 70, and opens the valve seat 71A of the atmosphere passage 71 instead. As a result, atmospheric pressure acts on the valve working chamber 25, the plunger 30 of the vacuum valve 2 moves downward by the spring force of the closing force applying spring 26, and the main valve 24 is closed.

Here, in the control section 27, a vent passage 80 that connects the valve working chamber 25 and the atmosphere communication chambers 56 and 63 below the diaphragms 51 and 52 is provided with the third case 33 and the fourth case 33. It is provided in the case 34, and the main valve opening time adjusting needle valve 81 is provided in the air passage 80 (see FIG. 4).

However, in the present embodiment, as shown in FIG. 1, in the middle of the atmosphere introducing passage extending from the atmosphere communicating pipe 43 to the vacuum valve 2, specifically, the atmosphere communicating pipe 43 and the hose 4 are provided.
A drainage device 90 is provided at a connection portion with 4, and 46. As shown in FIGS. 5 and 6, the drainage device 90 includes a water reservoir 91, an air communication port 92 communicating with the air communication pipe 43 in the middle of the water reservoir 91, and an upper portion of the water reservoir 91. Vacuum valve 2
Atmosphere communication port 93 communicating with the side is provided.
To the connection ports 94A and 94B connected to the hose 44,
46 can be connected. Further, the drainage device 90 is provided with a drain port 95 at the bottom of the water reservoir 91, and the drain port 95
A drainage pipe 96 connected to is opened at the upper part of the sewage tank 1.

Further, the drainage device 90 is provided with a partition plate 97 capable of passing water in the form of a lattice or a net inside the water reservoir 91, and the ball-shaped float valve 98 is mounted on the partition plate 97. The water that has entered the atmosphere communication pipe 43 flows into the water reservoir 91, then passes through the partition plate 97, and is discharged from the drain port 95 to the side of the dirty water tank 1 (FIG. 6 (B)). Then, when the inflow of inflow water from the atmosphere communication pipe 43 or the water level of the waste water in the waste water tank 1 rises due to an abnormality in the vacuum valve (it does not open even if the water level reaches a certain level), The float valve 98 floats above the partition plate 97 (FIG. 6 (C)).
Then, immediately before the water level in the water reservoir 91 approaches the upper atmosphere communication port 93 that communicates with the vacuum valve 2 side, the float valve 98 seals to the tapered seal portion 99 around the atmosphere communication port 93, Stop water. The float valve 98 is made of an elastic material and has a large water blocking effect.

7 and 8 show a modification of the drainage device 90. The drainage device 90A of FIG. 7 differs from the drainage device 90 in that instead of the partition plate 97, a plurality of ribs 96A are provided on the tapered inner surface around the drainage port 95. The float valve 98 is placed on the rib 96A, and the water flowing into the water reservoir 91 is drained from between the adjacent ribs 96A.

The drainage device 90B of FIG. 8 is the above drainage device 90.
The difference is that, instead of the partition plate 97, a plurality of grooves 96B are provided on the tapered inner surface around the drain port 95.
The float valve 98 rests on the tapered inner surface and
The water flowing into 1 is discharged from the groove 96B.

The operation of this embodiment will be described below. In order to prevent the infiltration of water into the vacuum valve 2 even if abnormal water infiltrates into the atmosphere communication pipe 43, the infiltrated water is separated and eliminated in the middle of the atmosphere communication pipe 43, and only the atmosphere is vacuumed by the vacuum valve. It should be sent to 2. This means that the inflow water is captured in the water reservoir 91, and this water is drained from the drain port 95 at the bottom of the water reservoir 91.
From the sewage masu 1 to the atmosphere, and the atmosphere
This is achieved by communicating with the vacuum valve 2 through the upper atmosphere communication port 93.

Normal infiltrated water does not reach the atmosphere communication port 93 above the water reservoir 91. However, a large amount of infiltration water is generated,
When the infiltrated water reaches the atmosphere communication port 93 above the water reservoir 91, the float valve 9 that floats in the water reservoir 91.
8 closes the atmosphere communication port 93 to prevent this infiltrated water from flowing into the vacuum valve 2. If the vacuum valve 2 is abnormally operated and remains open while the atmosphere communication port 93 is closed by the float valve 98, the vacuum force of the vacuum sewer pipe 5 is a space for the dirty water 1. Since it continues to reach the drainage port 95 of the water reservoir 91 via suction, and the infiltrated water in the water reservoir 91 also continues to be sucked and discharged at the same time, the atmosphere communication port 93 is reopened after completion of draining the infiltrated water. The communication pipe 43 is restored, and the operation of the vacuum valve 2 returns to normal.

Further, when the vacuum supply from the vacuum station is stopped due to a power failure or the like, and the sewage is no longer sucked in due to the decrease in the vacuum force of the vacuum sewer pipe 5, the sewage will be discharged.
It is also conceivable that the dirty water is filled inside, and the filled dirty water flows backward from the lower drain port 95 of the water reservoir 91 and enters the water reservoir 91. The operation of the vacuum valve 2 is not inconvenient even in this case. That is, in this case, similarly to the above, the water reservoir 9
The float valve 98 in 1 floats as the water level of the filled sewage rises and closes the atmosphere communication port 93.
To prevent it from flowing into. When the vacuum supply returns to normal due to the restoration of the power source or the like, the sewage in the sewage tank 1 is carried out through the vacuum valve 2, and the water level in the water reservoir 91 also falls along with the decrease in the water level in the sewage tank 1 and returns to normal.

(Second Embodiment) (FIGS. 9 to 14) The second embodiment differs from the first embodiment in the following points. That is,
In the present embodiment, as shown in FIG. 9, the atmosphere communication pipe 43
To the vacuum valve 2, a drainage device 100 is provided in the middle of the atmosphere introduction path, specifically, at the connecting portion between the atmosphere communication pipe 43 and the hoses 44 and 46. The drainage device 100 is shown in FIG.
0, as shown in FIG. 12, a water reservoir 101 is provided, an atmosphere communication port 102 communicating with the atmosphere communication pipe 43 is provided in an intermediate portion of the water reservoir 101, and the vacuum valve 2 side is communicated with an upper portion of the water reservoir 101. The atmosphere communication port 103 is provided, and the atmosphere communication port 10
The hose 4 described above is connected to the connection ports 104A and 104B connected to
4 and 46 can be connected. Furthermore, the drainage device 100
Has a drainage port 105 at the bottom of the water reservoir 101, and a drainage pipe 106 connected to this drainage port 105 communicates with the dirty water suction pipe 1A. The drain pipe 106 is the sewage suction pipe 1
The communication passage 28 between the A and the vacuum sewer pipe 5 may be connected to the sewage suction pipe 1A side of the vacuum valve 2 so as to communicate with the sewage suction pipe 1A. As a result, the drain pipe 106 is provided only when the vacuum valve 2 is opened.
The vacuum force of the vacuum sewer pipe 5 acts, and the vacuum valve 2
The vacuum force of the vacuum sewer pipe 5 is not leaked to the people when the is closed.

As shown in FIG. 12, the drainage device 100 is provided with a reflection plate 107 (water reflection plate) above the water reservoir 101 and below the atmosphere communication port 103. The reflector 107 is
The water is formed in a downward slope from directly above the atmosphere communication port 102, and the infiltration water from the atmosphere communication pipe 43 to the water reservoir 101 is reliably captured by the water reservoir 101, and the infiltration water from the atmosphere communication port 103 to the vacuum valve 2 side is obtained. Surely prevent intrusion.

13 and 14 show a modification of the installation form of the reflection plate 107. In FIG. 13, in addition to the above-described reflection plate 107 that is formed to be inclined downward just above the atmosphere communication port 102, a reflection plate 108 that is formed to be inclined downward from the opposite side of the atmosphere communication port 102 is provided on the upper side thereof.

In FIG. 14, an L-shaped reflection plate 109 is provided directly above the atmosphere communication port 102, and a reflection plate 110 that horizontally projects from the side opposite to the atmosphere communication port 102 is provided immediately below the atmosphere communication port 103. is there.

The operation of this embodiment will be described below.
In order to prevent the infiltration of water into the vacuum valve 2 even if abnormal water infiltrates into the atmosphere communication pipe 43, the infiltrated water is separated and eliminated in the middle of the atmosphere communication pipe 43, and only the atmosphere is vacuumed by the vacuum valve. It should be sent to 2. This means that the infiltrated water is captured in the water reservoir 101, and this water is released from the drain outlet 105 at the bottom of the water reservoir 101 into the dirty water suction pipe 1A of the dirty water 1 and the atmosphere is the atmosphere above the water reservoir 101. Communication port 103
To the vacuum valve 2.

The sewage suction pipe 1A connected to the drain outlet 105 at the bottom of the water reservoir 101 is at atmospheric pressure except when the vacuum valve 2 is opened, but when the vacuum valve 2 is opened, the vacuum sewer pipe 5 is opened.
Is sucked into a negative pressure by the vacuum force, and thus the inflow water of the water reservoir 101 is sucked by this negative pressure and discharged from the dirty water suction pipe 1A together with the dirty water.

At this time, generally, the water reservoir 10 is previously prepared.
The water accumulated in 1 is not drawn when the vacuum valve 2 is opened. That is, since the infiltrated water such as dew condensation in the atmosphere communicating pipe 43 usually moves together with the flow of the atmosphere in the atmosphere communicating pipe 43 when the vacuum valve 2 is opened, the water droplets of the infiltrating water are stored in the water reservoir 1.
The water is sucked into the dirty water suction pipe 1A almost at the same time as it is accumulated in the water 01. In any case, the infiltration of water into the vacuum valve 2 through the atmosphere communication pipe 43 is not seen.

In this case, since the sewage suction pipe 1A is connected to the water reservoir 101 provided in the middle of the atmosphere communication pipe 43, the atmosphere communication pipe 43 is opened when the vacuum valve 2 is opened.
The vacuum pressure of the vacuum sewer pipe 5 always acts on. Therefore, it is necessary to prevent this vacuum pressure from adversely affecting the introduction of the atmospheric pressure into the vacuum valve 2 by the atmosphere communication pipe 43. However, in general, the inside diameter of the atmosphere communicating pipe 43 is large enough to secure the amount of atmosphere introduced necessary for the operation of the vacuum valve 2, and the above-mentioned adverse effects do not occur. Then, the inner diameter of the drainage pipe 106 for communicating the wastewater suction pipe 1A with the water reservoir 101 can be made as small as possible, or the vacuum pressure acting on the atmosphere communication pipe 43 can be reduced and adjusted by the throttle valve provided in this drainage pipe 106. By doing so, the above adverse effects can be suppressed to a negligible level. That is, FIG.
The reference numeral 0 indicates that the diameter A of the drain pipe 106 is made sufficiently smaller than the relationship B between the hoses 44 and 46 connected to the vacuum valve 2 side. Further, in FIG. 11, the drain pipe 106 is provided with a throttle valve 111 capable of narrowing the flow passage area.

(Third Embodiment) (FIGS. 15 to 17) The third embodiment prevents the entry of water and the occurrence of dew condensation in the atmosphere communicating pipe 43 of the first and second embodiments. It is a structural example.

In FIG. 15, the heat insulating material 121 is wound around the outer surface of the atmosphere communicating pipe 43 to prevent dew condensation on the inner surface of the atmosphere communicating pipe 43. Further, at the underground buried portion of the atmosphere communication pipe 43, the waterproof material 122 is wound around the outer surface of the heat insulation material 121, and a heat insulation layer and a waterproof layer are provided as a covering layer of the atmosphere communication pipe 43.
It is provided with layers.

FIG. 16 shows the atmosphere intake port 4 of the atmosphere communication pipe 43.
3A is U-shaped, and the air intake 43A is directed vertically downward.

FIG. 17 shows the atmosphere intake port 4 of the atmosphere communication pipe 43.
By providing the shade 123 on 3A, the air intake 43A is directed substantially vertically downward.

The operation of this embodiment will be described below.
By heat-insulating the atmosphere communication pipe 43, the temperature difference between the inside and outside of the atmosphere communication pipe 43 can be reduced, and abnormal infiltration of water due to dew condensation on the inner surface of the pipe can be prevented. Further, by orienting the atmosphere introducing port 43A of the atmosphere communicating pipe 43 vertically downward, the safety factor capable of preventing abnormal water intrusion into the atmosphere communicating pipe 43 is increased, and abnormal water infiltration is possible as much as possible. It can be reduced.

The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and changes in design within the scope not departing from the gist of the present invention can be made. Even if it exists, it is included in the present invention. For example, a plurality of vacuum valves may be provided in the dirty water tank. At this time,
When sharing a single atmosphere communication pipe for multiple vacuum valves,
A single drainage device may be provided at the branch to the atmosphere communication pipe and each vacuum valve.

[0074]

As described above, according to the present invention, even if abnormal water infiltration occurs in the atmosphere introducing pipe communicating with the vacuum valve,
The water can be prevented from flowing into the vacuum valve, and the operation of the vacuum valve can be stabilized. Further, the present invention can be applied even when the shape of the atmosphere communicating pipe is different. Further, since there is no infiltration of water into the vacuum valve, maintenance and inspection of the vacuum valve and its control unit can be reduced, and corrosion of those parts can be prevented. Further, the mounting structure of the drainage device of the present invention is simple and easy to construct.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a wastewater tank to which a first embodiment of the present invention is applied.

FIG. 2 is a schematic diagram showing a vacuum valve.

FIG. 3 is a cross-sectional view showing a control unit of a vacuum valve.

FIG. 4 is another cross-sectional view showing a control unit of the vacuum valve.

FIG. 5 is a schematic diagram showing a main part of the first embodiment.

FIG. 6 is a schematic view showing a water reservoir of the first embodiment.

FIG. 7 is a schematic view showing a modified example of the water reservoir.

FIG. 8 is a schematic diagram showing another modification of the water reservoir.

FIG. 9 is a schematic diagram showing a wastewater tank to which the second embodiment of the present invention is applied.

FIG. 10 is a schematic diagram showing a main part of a second embodiment.

FIG. 11 is a schematic diagram showing a throttle valve provided in a drain pipe connected to a water reservoir.

FIG. 12 is a schematic diagram showing a water reservoir of the second embodiment.

FIG. 13 is a schematic diagram showing a modified example of the water reservoir.

FIG. 14 is a schematic diagram showing another modification of the water reservoir.

FIG. 15 is a schematic diagram showing an atmosphere communication pipe with a heat insulating coating.

FIG. 16 is a schematic view showing an example in which the atmosphere inlet of the atmosphere communicating pipe is U-shaped.

FIG. 17 is a schematic diagram showing an example in which a cap is provided at the air intake of the air communication pipe.

FIG. 18 is a schematic diagram showing a vacuum sewer.

FIG. 19 is a schematic diagram showing a water infiltration state of an atmosphere communication pipe.

FIG. 20 is a schematic view showing another water infiltration state of the atmosphere communication pipe.

[Explanation of symbols]

 1 Sewage Masu 1A Sewage suction pipe 2 Vacuum valve 5 Vacuum sewage pipe 28 Communication path (connection part) 43 Atmosphere communication pipe 43A Atmosphere intake 90, 100 Drainage device 91, 101 Water storage part 93, 103 Atmosphere communication port 95, 105 Drainage Mouth 98 Float valve 107, 108, 109, 110 Reflector (water reflector) 121 Heat insulating material

Claims (4)

[Claims] 1. A sewage pipe installed in a sewage basin with a vacuum valve for vacuum sewerage, operated by being supplied with an atmosphere introduced by an air communication pipe, and communicating with the sewage sewage pipe and a vacuum sewage pipe communicating with a vacuum source. In the atmospheric communication pipe drainage device of the vacuum valve that can open and close the communication part between and, a water reservoir is provided in the middle of the atmosphere introduction path extending from the atmosphere communication pipe to the vacuum valve, and the bottom of this water reservoir is The drain outlet provided in the above is opened to the sewage tank, and the atmosphere communication port that communicates with the vacuum valve side is provided at the upper part of this water reservoir, and the air communication port at the upper part of the above water reservoir is connected to the water level of the water reservoir. An atmospheric communication pipe drainage device for a vacuum valve, comprising a float valve that floats when lifted to close the atmospheric communication port. 2. A sewage pipe installed in a sewage tank with a vacuum valve for vacuum sewerage, operated by being supplied with the atmosphere introduced by an air communication pipe, and connected to the sewage suction pipe communicating with the sewage tank and a vacuum sewage pipe communicating with a vacuum source. In the atmospheric communication pipe drainage device of the vacuum valve that can open and close the communication part between and, a water reservoir is provided in the middle of the atmosphere introduction path extending from the atmosphere communication pipe to the vacuum valve, and the bottom of this water reservoir is The drainage device in the atmosphere communication pipe of the vacuum valve, characterized in that the drainage port provided in the is communicated with the sewage suction pipe, and an atmosphere communication port communicating with the vacuum valve side is provided in the upper part of the water reservoir. 3. The atmospheric communication pipe drainage device for a vacuum valve according to claim 2, wherein a water reflection plate is provided above the water reservoir and below the atmosphere communication port. 4. The atmosphere communication pipe is heat-insulated and the atmosphere intake port is oriented vertically downward.
The atmospheric communication pipe drainage device of the vacuum valve according to any one of items 1 to 3.