JP3751832B2 - In-building vacuum drainage collection system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an in-building vacuum drainage collection system that transports wastewater in various buildings using a differential pressure between atmospheric pressure and vacuum.
[0002]
[Prior art]
Conventionally, wastewater collection in various buildings such as apartment houses, offices, hotels, hospitals, stores, amusement facilities (theme parks, theaters, etc.) has been carried out by a natural flow method based on gravity and piping gradient. That is, as shown in FIG. 4, drainage pipes 801, 811 and 831 such as toilet toilet 80, hand-washing 81 and kitchen sink 83, which are drainage sources, are connected to a drainage horizontal branch pipe 85, and this drainage horizontal branch pipe 85 is drained. The drainage horizontal branch pipe 85 is provided with a predetermined downward slope so that the drainage in the drainage horizontal branch pipe 85 flows into the drainage vertical pipe 87 under natural flow. However, the natural flow method has the following problems in design, construction and maintenance.
[0003]
(1) Since the drainage horizontal branch pipe 85 requires a gradient, if the drainage horizontal branch pipe 85 needs to cross a water pipe, a gas pipe, an air conditioning duct, various cables, etc., it is always It is necessary to avoid with the branch pipe 85 on the lower side, and it is difficult to lay it in a limited piping space under the ceiling or under the floor slab.
[0004]
(2) When the drain pipe is damaged, water leaks and adversely affects other various pipes, air conditioning ducts, various cables and the like.
[0005]
There is a vacuum wastewater collection system as a wastewater collection system that solves the above problems, but there are the following technical problems even when this system is used.
[0006]
(3) The vacuum piping also requires a slight gradient in order to increase the drainage transfer efficiency. If no gradient is provided, a bent portion 91 that protrudes downward is provided in the middle of the vacuum piping 90 as shown in FIG. Since it is necessary to prevent the backflow of drainage here, there is a limit to laying it in a limited piping space with other various pipes, air conditioning ducts, various cables, etc., although not as much as the natural flow type. there were.
[0007]
(4) A method of installing a check valve in the vacuum pipe to eliminate the gradient and bent part to prevent backflow is also conceivable, but in the situation where pressure loss occurs upstream of the check valve, The operation of the installed vacuum valve could become unstable.
[0008]
[Problems to be solved by the invention]
The present invention has been made in view of the above points, and an object thereof is to provide an in-building vacuum drainage collection system that can easily avoid various pipes, ducts, cables, and the like in the building.
[0009]
Another object of the present invention is to provide a vacuum drainage collection system in a building that can prevent backflow of drainage and can stably operate a vacuum valve even when laid horizontally without the gradient of vacuum piping. It is in.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention attaches a vacuum valve to the drain pipes of various facilities in a building, and circulates the room using the piping on the downstream side of the vacuum valve as a vacuum piping, and then connects it to a vacuum water collection tank In a vacuum drainage collection system in a building that sucks water drained from various facilities by opening the vacuum valve into a vacuum water collection tank, a check for preventing backflow of drainage is applied to a predetermined part of the vacuum piping that crawls the room A valve is attached.
[0011]
Further, the present invention is characterized in that a vacuum pipe that crawls around the room is provided with an upper portion that avoids other members, and the check valve is attached to the upper portion.
[0012]
Further, the present invention is characterized in that a vacuum outlet is provided on the discharge side of the check valve, and the vacuum taken out from the vacuum outlet is supplied to the vacuum valve as power for opening and closing the vacuum valve.
[0013]
Further, the present invention is characterized in that a flap valve is used as the check valve.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram showing an embodiment of a vacuum drainage collection system in a building according to the present invention. As shown in the figure, this in-building vacuum drainage collection system includes vacuum valve units 10-1, 2 in drain pipes 61, 66, 71 such as a toilet toilet 60, a hand-washing 65, and a kitchen sink 70, which are drainage sources. , 3 are connected. Each vacuum valve unit 10-1, 2, 3 includes a sewage tank 11 and a vacuum valve 20. Here, the sewage masu 11 collects the drainage from the drainage source under natural flow.
[0015]
Then, a pipe 21 connected to the downstream side of each vacuum valve 20 is started up as a vacuum pipe and connected to a drain side branch pipe 23 made of a vacuum pipe installed on the back of the room ceiling. The drainage horizontal branch pipe 23 is connected to a drainage standing pipe 25 made of a vacuum pipe, and is connected to a vacuum type water collection tank 30 installed in a vacuum station. A vacuum pump P1 that evacuates the inside of the vacuum water collection tank 30 and a drain pump P2 that conveys the collected water to, for example, a public sewer or sewage treatment facility are connected.
[0016]
In addition, check valves 35 are respectively installed in the vicinity of portions of the pipe 21 connected to the drainage side branch pipe 23 so that the drainage does not flow back to the pipe 21 from the drainage side branch pipe 23 side.
[0017]
On the other hand, the drainage horizontal branch pipe 23 is wound around the back of the ceiling in a substantially horizontal plane. The pipe 40 such as a water supply pipe and a gas pipe on the back of the ceiling, various ducts 41 for air conditioning and the like, although not shown, When it is necessary to cross other parts such as cables for telephone, communication, alarm, monitoring, etc., the upper part 24 is provided to avoid these other parts and maintain the horizontal position as it is (original And a check valve 37 for preventing the water in the upper portion 24 from flowing back to the upstream portion (lifted portion) at the same time. It is attached. FIG. 2 is an enlarged schematic view of the main part of the upper portion 24. As shown in the figure, in the present invention, in order to facilitate the avoidance of other members such as other pipes 40 and ducts 41, a vacuum pipe that can be laid upward and horizontally can be used. It was configured to prevent backflow by installing.
[0018]
FIG. 3 is an enlarged cross-sectional view showing the internal structure of the check valves 35 and 37. As shown in the figure, the check valves 35 and 37 include a ring-shaped valve seat 51 provided in the pipe 50, a valve body 53 that opens and closes the valve seat 51 around a shaft 54, and a valve It is provided with a nozzle-like vacuum outlet 55 that is provided on the discharge side (downstream side) upper portion of the body 53 and takes out the vacuum for operating the vacuum valve. As shown in the figure, the check valves 35 and 37 use flap valves with a small number of parts and a simple structure. Therefore, the check valves 35 and 37 can be reduced in size and weight and can be easily applied to piping facilities in a building.
[0019]
The vacuum outlet 55 is connected to the vacuum valve 20 by a pipe 57 shown in FIG. 1, and the vacuum taken out from the vacuum outlet 55 is used as power for opening and closing the vacuum valve. Thus, even when a lift such as the pipe 21 is provided immediately after the vacuum valve 20, a vacuum for operating the vacuum valve 20 can be supplied from the discharge side of the check valve 35 or 37, so that the vacuum valve 20 is always stable. Operation can be achieved. In this embodiment, since the vacuum is supplied to each vacuum valve 20 from the vacuum outlet 55 of the check valve 35, the vacuum outlet 55 of the check valve 37 is not used. In this case, the vacuum outlet 55 of the check valve 37 may be closed. Needless to say, instead of the check valve 35, the vacuum outlet 55 of the check valve 37 may be used.
[0020]
Moreover, you may avoid the said other members 40 and 41 by moving down as needed. Even in the case of going down, it is possible to install a lift (upwardly inclined pipe) in the vacuum type, so that it can be easily returned to the original height, so that the drainage side branch pipe 23 is kept within a certain height range. Can be laid.
[0021]
As described above, since the drainage horizontal branch pipe 23 is laid substantially horizontally and the other members 40 and 41 are moved upward and / or downward, many other members are installed behind the ceiling. Even if there is only a limited piping space, it can be laid easily.
[0022]
For example, when a predetermined amount of sewage accumulates in one of the sewage basins 11 shown in FIG. 1, the vacuum valve 20 is opened, and the sewage is collected from the pipe 21 through the drainage side branch pipe 23 and the drainage stack 25 and collected in vacuum. It is introduced into the tank 30. In addition, since the check valves 35 and 37 are respectively attached to the portions that may cause the backflow of water as described above, even if the drainage horizontal branch pipe 23 is installed horizontally, it is efficient while preventing the backflow of sewage. Transport can be performed.
[0023]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. Note that any shape, structure, or material not directly described in the specification and drawings is within the scope of the technical idea of the present invention as long as the effects and advantages of the present invention are exhibited. For example, in the above-described embodiment, drainage sucked from the vacuum valve units 10-1, 2, 3 is guided to the piping space behind the ceiling, but may be guided to the piping space under the floor slab instead of the ceiling. That is, in this case, a vacuum pipe such as the drainage side branch pipe 23 is installed in the pipe space under the floor slab.
[0024]
【The invention's effect】
As described in detail above, the present invention has the following excellent effects. (1) The wastewater treatment system for wastewater from various facilities in the building is composed of a vacuum wastewater collection system equipped with a vacuum valve and vacuum piping, and a check valve for preventing backflow of drainage is provided at a predetermined part of the vacuum piping. Since it is attached, it is possible to easily lay the vacuum pipe horizontally without any gradient and avoid other members, and it is also possible to lay the vacuum pipe in a narrow pipe space, thereby reducing the construction cost.
[0025]
(2) Eliminates backflow in horizontally laid vacuum piping and improves drainage transfer efficiency, so the equipment capacity of the vacuum pump installed in the vacuum water collection tank can be reduced and the operation time can be shortened, making it economical. Become a system.
[0026]
(3) Since the vacuum taken out from the vacuum outlet provided on the discharge side of the check valve is supplied to the vacuum valve as power for opening and closing the vacuum valve, the operation of the vacuum valve is stabilized.
[0027]
(4) When a flap valve is used as a check valve, the structure is simple, so it can be made smaller and lighter than conventional check valves, reducing the number of parts, and installing and maintaining the check valve Becomes easier.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of an in-building vacuum drainage collection system according to the present invention.
FIG. 2 is an enlarged schematic view of a main part of a portion of the upper part 24;
FIG. 3 is an enlarged sectional view showing the internal structure of check valves 35 and 37;
FIG. 4 is a diagram showing an example of a conventional natural flow type piping.
FIG. 5 is a view showing a conventional vacuum pipe shape for preventing backflow.
[Explanation of symbols]
10-1, 2, 3 Vacuum valve unit 11 Sewage water 20 Vacuum valve 21 Piping (Vacuum piping)
23 Horizontal drainage pipe (vacuum piping)
24 Upper part 25 Drainage stack (vacuum piping)
30 Vacuum collection tank P1 Vacuum pump P2 Drain pump 35, 37 Check valve 40 Pipe 41 Duct 50 Pipe 51 Valve seat 53 Valve body 55 Vacuum outlet 57 Pipe 60 Toilet (various equipment)
61 Drain pipe 65 Hand wash (various facilities)
66 Drain pipe 70 Sink (Various facilities)
71 Drain pipe

Claims (4)

A vacuum valve is attached to the drain pipes of various equipment in the building, and the pipe downstream of the vacuum valve is used as a vacuum pipe, and then connected to a vacuum-type water collection tank. In the building vacuum drainage collection system that sucks the drained water into the vacuum-type water collection tank,
A vacuum drainage collection system in a building, wherein a check valve for preventing backflow of drainage is attached to a predetermined part of a vacuum pipe that crawls inside the room. 2. A vacuum drain in a building according to claim 1, wherein a vacuum pipe that crawls around the room is provided with an upper portion that avoids other members, and the check valve is attached to the upper portion. Collection system. The vacuum drain in the building according to claim 1 or 2, wherein a vacuum outlet is provided on the discharge side of the check valve, and the vacuum taken out from the vacuum outlet is supplied to the vacuum valve as power for opening and closing the vacuum valve. Collection system. The in-building vacuum drainage collection system according to claim 1, wherein a flap valve is used as the check valve.

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