JPH05187052A - Vacuum pipeline - Google Patents

Abstract

PURPOSE:To ensure continuous transfer of waste water through a pipeline under normal conditions without stopping the transfer of waste water of all pipelines when the vacuum in one of the pipelines has abnormally dropped and inspection and repair is required in a vacuum system wherein a plurality of vacuum (waste water) lines are connected to a single vacuum station. CONSTITUTION:In vacuum pipelines, each end of a pair of lines 14a, 14b and each intermediate point thereof are interconnected by flow lines 2a, 2b each having therein a shutoff valve 3. When the vacuum in one of the lines has abnormally fallen, the shutoff valve 3 is opened by means of a vacuum sensor 1 provided in a vacuum station 16 to transfer the waste water of the line by means of the other line under vacuum.

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 line in a vacuum sewer system.

[0002]

2. Description of the Related Art FIG. 2 is a schematic explanatory view of an example of a known vacuum type 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 system with a vacuum valve 13 inside, 14
a and 14b are vacuum (dirty water) lines of two systems, 15 is a lift part provided in the middle of each vacuum line 14a and b, and 16
Is a vacuum station (vacuum pumping station), which is internally provided with a vacuum pump 17, a water collecting tank 18, a pressure pump 19, and the like. 20 is connected to a public sewer trunk line and a sewage treatment plant.

Wastewater D discharged from each home is drained by a drain pipe 1.
When the water level of the accumulated sewage rises through 1 to the sewage basin 12, the air in the water level detection pipe (not shown) is compressed and the controller operates, and the internal valve opens by the force of the vacuum, and The dirty water is sucked from the suction pipe into the respective vacuum pipelines 14a and 14b. The valve, once opened, is configured to automatically close after the level of the sewage basin 12 drops.

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

[0005]

However, as a matter of fact, drainage sewage from each of the doors to be transported often contains extremely various foreign substances, which are vacuum valves 13 in each sewage chamber 12. Between the valve body and the valve seat causes abnormalities such as blockage of the valve and improper shutoff, or changes in the gas-liquid ratio of the carrier fluid, etc., and accidentally causes the vacuum level of the pipeline to be reduced or the carrier cannot be transported It was inevitable. When these abnormal phenomena cannot be eliminated by various controls, it is necessary to suspend the transfer operation of the vacuum pipeline system, remove foreign substances by human power, and replace the vacuum valve 13.

Since these operations require a relatively large number of man-hours / hours, the transportation of the sewage belonging to this pipeline is stopped during that time, resulting in inconvenience to each door. The present invention has been made in view of the above situation, and even when an abnormality occurs in one of the plurality of vacuum pipelines as described above, the operation of the entire pipeline system is not stopped and the operation is prevented. The purpose is to provide a means for continuing the transport of sewage in a pipeline that does not exist.

[0007]

Therefore, according to the present invention, in a vacuum type sewage system in which a plurality of vacuum pipelines each including an arbitrary number of wastewater tanks with vacuum valves are connected to a single vacuum station, Each terminal and intermediate points of arbitrary two pipelines of the vacuum pipelines are connected to each other by a circulation pipeline through a shutoff valve, and at the vacuum station, among the two pipelines. When the degree of vacuum in one of the pipelines drops below a predetermined value continuously for a predetermined time or longer, the shut-off valve is opened and the waste water in this one pipeline is vacuum-transferred by the other pipeline. It is intended to achieve the above object.

[0008]

When the abnormality of one pipeline is detected by the above vacuum pipeline configuration, for inspection and repair, without interrupting the vacuum transfer of the entire pipeline system, the pipeline section without any trouble can be It is possible to continue transporting the sewage through the distribution pipe and the other one conduit.

[0009]

EXAMPLES The present invention will be described below based on examples. FIG. 1 is a block diagram showing the configuration of an embodiment in which the present invention is applied to the conventional vacuum sewer system diagram example having the pair of vacuum pipelines shown in FIG.

(Structure) The feature of this embodiment is that two communication conduits 2a, 2b are provided with a shutoff valve 3 at each end of a pair of vacuum conduits 14a, 14b and at appropriate intermediate points. The vacuum station 16 is provided with each pressure sensor 1 for detecting an abnormality in the degree of vacuum in each of the vacuum pipelines 14a and 14b.

(Operation) For example, when the pressure sensor 1 continuously detects an abnormal decrease in the degree of vacuum in one of the vacuum conduits 14a for a predetermined period of time, the shutoff valves 3 of the two communicating pipes 2a and 2b are controlled to open. Since the sewage in the pipelines other than the defective sewage tank is continuously vacuum-transported by the vacuum pipeline 14b on the other side, it is possible to avoid inconvenience to each user for repairing the breakdown.

In the above embodiment, the case where the two communication pipes 2a and 2b are provided in the system in which the pair of vacuum pipes 14a and 14b are connected to the single vacuum station 16 has been described. The invention is not limited to this, and a plurality of intermediate-point communication pipes 2b may be provided depending on the arrangement of each wastewater tank 12. Further, it is needless to say that it is possible to have a plurality of vacuum pipe lines of two or more, and to arrange any suitable number of intermediate communication pipes for each of these pipe lines. Furthermore, it is also possible to provide a means for detecting the position of the sewage mist in which an abnormality has occurred, and control the shutoff valve of each communication pipe in accordance with 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 shut-off valve of the communication pipe is opened and the other vacuum pipe is opened. Since it is configured to be vacuum-transferred from the passage, the defective portion can be repaired without suspending the conveyance of the entire pipeline as in the conventional case.

[Brief description of drawings]

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

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

[Explanation of symbols]

 1 Pressure Sensor 2a, 2b Communication Pipeline 3 Shutoff Valve 12 Sewage with Vacuum Valve 14a, 14b Vacuum Pipeline 16 Vacuum Station

Claims (1)

[Claims] 1. A vacuum sewer system in which a single vacuum station is connected to a plurality of vacuum wastewater conduits each containing an arbitrary number of wastewater tanks with vacuum valves, wherein any two of these vacuum wastewater conduits are connected. Each of the ends of the pipeline and each of the intermediate points are connected to each other by a circulation pipeline through a shutoff valve, and at the vacuum station, the degree of vacuum in one of the two pipelines is increased. The vacuum pipe line is characterized in that when the water pressure drops below the predetermined value continuously for a predetermined time or longer, the shutoff valve is opened and the waste water in this one pipe line is vacuum-transferred by the other one pipe line.