JP2999046B2 - Vacuum line - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum sewage pipe in a vacuum sewer system.

[0002]

2. Description of the Related Art FIG. 2 is a schematic explanatory diagram showing an example of a known vacuum sewer system of this type for collecting sewage from many houses and facilities. 10 is a plurality of houses, 11 is a drain pipe,
12 is a sewage tank with a vacuum valve 13 inside, 14
a and 14b are two systems of each vacuum (sewage) pipeline, 15 is each lift provided in the middle of each vacuum pipeline 14a and b, 16
Is a vacuum station (vacuum pump station), which is provided with a vacuum pump 17, a water collecting tank 18, a pressure pump 19, and the like. Reference numeral 20 is connected to a public sewer main line or a sewage treatment plant.

[0003] The sewage D discharged from each household is supplied to a drain pipe 1
1 flows into the sewage tank 12, and when the level of the collected sewage rises, the air in a water level detection tube (not shown) is compressed and the controller is activated, and the internal valve is opened by the force of the vacuum to open the pool. Waste water is sucked from the suction pipe into the vacuum lines 14a and 14b. Once opened, the valve is configured to automatically close after the sewage tank 12 drops.

As described above, in this type of system, the sewage is transported in a gas-liquid two-phase fluid state by the vacuum force of each vacuum line 14a, 14b.
It is necessary that the inside of 4a and 14b always maintain a degree of vacuum equal to or higher than a predetermined value.

[0005]

However, as a practical problem, these wastewater from each house to be conveyed often contains extremely various foreign substances, and these wastewater and wastewater contain vacuum valves 13 in each of the wastewater chambers 12. Between the valve body and the valve seat, causing abnormalities such as blockage of the valve or poor closing, or fluctuation of the gas-liquid ratio of the carrier fluid, etc., resulting in accidental reduction of the degree of vacuum in the pipeline or inability to carry. That was inevitable. If these abnormal phenomena cannot be eliminated by various controls, it is necessary to suspend the transfer operation of the vacuum pipe system and remove foreign substances by human power, replace the vacuum valve 13, and the like.

[0006] Since these operations require a relatively large number of man-hours / hours, during this time, the conveyance of sewage belonging to the pipeline system is stopped, which results in inconvenience for each house. The present invention has been made in view of the above-described aspects, and even if an abnormality occurs in one of the plurality of vacuum pipes as described above, without interrupting the operation of the entire pipe system, no problem is caused. The purpose is to provide a means for continuing the sewage conveyance in the pipe section where there is no pipeline.

[0007]

Therefore, according to the present invention, in a vacuum type sewage system in which a single vacuum station is connected to a plurality of vacuum lines each including an arbitrary number of sewage tanks with vacuum valves. The terminals of the arbitrary two pipes among the vacuum pipes and the respective intermediate points are connected to each other by a flow pipe with a shut-off valve interposed therebetween, and at the vacuum station, of the two pipes, When the degree of vacuum in one of the pipes continuously drops below a predetermined value for a predetermined time or more, the shut-off valve is opened and the contaminated water in this one pipe is vacuum-conveyed by another one pipe. The above-mentioned object is to be achieved.

[0008]

With the above-described vacuum line configuration, when an abnormality is detected in one line, the vacuum transfer of the entire line system is not interrupted for inspection and repair, so that there is no trouble in the line portion. Conveyance of the sewage can be continued through another flow path via the flow pipe.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments. FIG. 1 is a block diagram showing the configuration of an embodiment in which the present invention is applied to a conventional vacuum type sewer system having a pair of vacuum lines shown in FIG.

(Structure) This embodiment is characterized in that two ends of a pair of vacuum lines 14a, 14b and an appropriate intermediate point are connected to each other by two communication lines 2a, 2b each having a shut-off valve 3 interposed therebetween. The vacuum station 16 is provided with each pressure sensor 1 for detecting an abnormality in the degree of vacuum of each of the vacuum pipes 14a and 14b.

(Operation) For example, when an abnormal decrease in the degree of vacuum of one of the vacuum pipes 14a is continuously detected by the pressure sensor 1 for a predetermined time, the shut-off valves 3 of the two communication pipes 2a and 2b are controlled to open. Since the sewage in the pipe section other than the faulty sewage tank is continuously transported in vacuum by the vacuum pipe 14b on the other side, it is possible to avoid inconvenience to each user for repairing the fault.

In the above embodiment, a description has been given of an example in which two communication pipes 2a and 2b are provided in a system in which a pair of vacuum pipes 14a and 14b are connected to a single vacuum station 16. The invention is not limited to this, and the communication pipe 2b at the intermediate point may be plural depending on the arrangement of each sewage trough 12. In addition, it is needless to say that it has two or more vacuum conduits, and any appropriate number of intermediate communication pipes can be provided at any one of these conduits. Furthermore, means for detecting the position of the sewage basin in which the abnormality has occurred may be provided, and the shutoff valve of each communication pipe may be controlled according to the identified position.

[0013]

As described above, according to the present invention, when an abnormal decrease in the degree of vacuum occurs in one of the plurality of vacuum pipes of the vacuum station, the shutoff valve of the communication pipe is opened to open another vacuum pipe. Since the transfer is performed by vacuum from the road, it is possible to repair the failed portion without stopping the transfer of the entire pipeline as in the related art.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a vacuum conduit.

FIG. 2 is a schematic view of an example of a conventional vacuum sewer system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pressure sensor 2a, 2b Communication line 3 Shut-off valve 12 Sewage tank with vacuum valve 14a, 14b Vacuum line 16 Vacuum station

Claims (1)

(57) [Claims] 1. In a vacuum sewage system in which a single vacuum station is connected to a plurality of vacuum sewage lines each including an arbitrary number of sewage tanks with vacuum valves, any two of these vacuum sewage lines are connected. Each terminal of the pipeline and each intermediate point are connected to each other by a circulation pipeline with a shut-off valve interposed therebetween, and the degree of vacuum in one of the two pipelines at the vacuum station. When the pressure drops continuously below a predetermined value for a predetermined time or more, the shut-off valve is opened and the contaminated water in one pipe is conveyed by vacuum through another pipe.