JP3107657B2 - Vacuum sewer monitoring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an abnormality monitoring device for a vacuum sewer system.

[0002]

2. Description of the Related Art In order to collect sewage from a large number of houses and facilities, the sewage from each house is led through a drain pipe to a sewage tank equipped with a vacuum bubble and stored there, and from there to a public vacuum station (vacuum pump station). In recent years, vacuum type sewer systems have been widely used in which suction is performed through a vacuum sewage pipe provided with each lift section, and the suction is performed therefrom to a public sewer main line or a sewage treatment plant for drainage.

In this type of sewage system, the sewage accumulated in the sewage sewage often contains foreign matters because it is drainage that flows directly down from each house, and the sewage is often clogged with foreign substances due to clogging of vacuum sewage pipes and vacuum valves. Malfunctions can occur, and these abnormal situations require maintenance or replacement of the vacuum valve.

[0004] Therefore, it is desirable to constantly monitor the occurrence of these abnormalities so that the countermeasures can be taken promptly. For this reason, various proposals have hitherto been made. For example, Japanese Unexamined Patent Publication No. 3-43527 discloses that the opening and closing of a vacuum valve is detected using a permanent magnet and a magnetic detector, the abnormality is determined, and the abnormality is determined. A proposal for providing an alarm box at home and issuing an alarm has been disclosed (referred to as Conventional Example 1).

[0005] Japanese Patent Application Laid-Open No. 3-76945 discloses that
By installing a water level detector to detect the abnormal water level of the sewage collected in the sewage basin, and extracting the signal to the outside,
A proposal has been disclosed that can detect an abnormality before the sewage overflows to the ground due to a vacuum valve failure as in the related art (referred to as Conventional Example 2).

[0006]

However, in the apparatus for monitoring the open / closed state of the vacuum valve of the prior art 1 described above, the foreign matter interposed between the valve body and the valve seat of the vacuum valve is, for example, a part of thin underwear or the like. In this case, it is difficult to detect a minute abnormal position or the like of the valve body by a magnetic proximity sensor or the like that is currently on the market.

[0007] In the abnormal water level detecting means of the above-mentioned conventional example 2, various normal water levels in the manhole can be detected in a normal sewer system, but in the case of a vacuum type sewer, any abnormal water level can be detected. For example, in a vacuum sewage pipe 20 as shown in FIG. 4, the position of a vacuum unit (a sewage tank with a built-in vacuum valve) 21 in which a foreign matter is caught in a valve body of a vacuum valve and a vacuum leak occurs. When the distance between the vacuum station 22 and the vacuum station 22 is relatively short, the degree of vacuum at the vacuum station 22 rapidly decreases, and the vacuum pump (not shown) is almost continuously operated.
Sewage is sucked through the gap between the foreign objects caught, and becomes sewage 21
In some cases, no abnormal rise in water level will occur.

That is, when foreign matter is caught in any one of the vacuum units, the contaminated water is sucked from the gap between the contaminants, and the degree of vacuum of the entire vacuum sewage pipe line 20 is reduced, this is caused by a vacuum relatively close to the vacuum station 22. In the case of the unit 21, even though the degree of vacuum is reduced to some extent, it is still possible to suction sewage, but this is relatively far from the vacuum station 22. For example, in the case of the vacuum unit 23, the degree of vacuum is greatly reduced and sewage suction is performed. Becomes impossible, and abnormal water level rise occurs in the sewage tank 23. In such a case, if only monitoring the water level, the abnormality can be determined to be sewage 23 and maintenance personnel can be dispatched there, but the actual direct cause is sewage 21 and if this cannot be found, No fundamental measures will be taken.

Further, in order to provide an alarm box in each home as in Conventional Example 1, a new place for wiring and a display device is required. There was a problem that it could hinder the work.

The present invention has been made in view of the above-described aspects, and monitors both an abnormal level of vacuum in a vacuum valve and an abnormally high water level of sewage in a sewage tank. The purpose is to provide a means for installing an abnormality determination display means that is not required.

[0011]

SUMMARY OF THE INVENTION Accordingly, in the present invention, a vacuum valve in a sewage sewage system of a vacuum sewer system is provided.
A pressure detecting means communicating with the vacuum sewage pipe immediately before the sewage pipe, and a water level detecting means in the sewage basin, and an abnormality judging display means for judging and displaying an abnormality by monitoring the output of each of these detecting means. Is provided at the top of the breather pipe for supplying atmospheric pressure to the vacuum valve, and the wiring between each detecting means arranged in the sewage basin and the abnormality judgment display means arranged at the top of the breather pipe is passed through the breather pipe. The above-mentioned object is achieved by configuring a vacuum type sewer monitoring apparatus as described above.

[0012]

[Function] With the above system configuration, it is possible to monitor both the degree of vacuum of the vacuum unit in the sewage tank and the abnormal water level of the sewage and judge and display the abnormality. By using a breather pipe to provide a judgment display part on the top and using it for wiring, there is no need for a special place, and maintenance of the natural flow of drainage from each door to the sewage tank Eliminate the fear of hindering work.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments. FIG. 1 is a schematic configuration diagram showing one embodiment of a monitoring device according to the present invention, and FIG. 2 is a block configuration diagram thereof.

(Constitution) 1 is sewage, and a vacuum unit is formed by incorporating a vacuum valve 2 and the like. Reference numeral 3 denotes a vacuum sewage pipe guided to a vacuum station, 4 denotes a natural downflow pipe for drainage from each house, and 5 denotes a breather pipe for supplying the vacuum valve 2 with atmospheric pressure.

This embodiment is characterized by a pressure (vacuum degree) sensor 6 communicating with a vacuum supply tube 3a from a vacuum sewage pipe 3 immediately before a vacuum valve 2, and a water level sensor at an intermediate height position of the sewage tank 1. 7 and the signal lines 6a, 6a,
7 a is inserted through the inside of the breather tube 5, and an abnormality judgment display section 8 is provided at the top thereof. Reference numeral 9 denotes the display lamp, and reference numeral 10 denotes an alarm buzzer. Reference numeral 11 in FIG. 2 denotes a CPU including an A / D converter for each signal.

(Operation) FIG. 3 shows an operation sequence flowchart in the above configuration. As clearly shown in the figure, after the initial setting of each data in step S1, the degree of vacuum and the water level are read into the CPU 11 by the pressure sensor 6 and the water level sensor 7 in steps S2 and S3, respectively.
The abnormality is determined in steps S4 and S5, and the display lamp 9 and the buzzer 10 are activated in steps S7 and S8, or the alarm is reset in step S6.

(Other Embodiments) In FIG. 1, the pressure sensor 6 is provided in the vacuum unit. However, it is provided in the abnormality judgment display section 8 at the top of the breather tube 5, and the inside of the breather tube 5 is provided. May be connected via a pressure tube. In order to reduce the cost, the pressure sensor 6 is not added to all the vacuum units of the vacuum sewage pipe system, but is provided only at a point such as an uppermost stream portion, a branch portion, or a lowermost stream portion. It goes without saying that there is no problem.

[0018]

As described above, according to the present invention, both the degree of vacuum and the abnormal water level of the vacuum unit in each sewage tank of a vacuum sewer are monitored to determine the abnormality, and the top of the breather pipe is determined. Since there is no need for a special place for this, there is no fear that the drainage from each house to the sewage basin may be an obstacle to the maintenance work under the natural flow.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of a monitoring device.

FIG. 2 is a block diagram of FIG. 1;

FIG. 3 is an operation sequence flowchart of FIG. 1;

Fig. 4 Example of vacuum sewage pipe

[Explanation of symbols]

 1 filthy water 2 vacuum valve 3 vacuum sewage pipe 5 breather pipe 6 pressure sensor 7 water level sensor 8 abnormality judgment display

──────────────────────────────────────────────────続 き Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G01M 3/00-3/40 E03F 3/00 JICST file (JOIS)

Claims (3)

(57) [Claims] Claims: 1. A pressure detecting means communicating with a vacuum sewage pipe immediately before a vacuum valve in a sewage sewage system of a vacuum sewer system;
A vacuum type sewer monitoring device comprising: a water level detecting means in the sewage basin. 2. The apparatus according to claim 1, wherein an abnormality determination display means for monitoring an output of each of said detection means to determine and display an abnormality thereof is provided at a top of a breather pipe for supplying atmospheric pressure to said vacuum valve. The vacuum type sewer monitoring device according to claim 1, wherein: 3. The vacuum sewer monitoring device according to claim 2, wherein said breather pipe is used to connect each of said detection means and abnormality judgment display means.