JP2013112946A - Sewer pipe bypass drainage system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sewer pipe bypass drainage system capable of preventing a discharge pump in a drainage unit from clogging.SOLUTION: A sewer pipe bypass drainage system which bypasses a work section KK and makes sewage water of a second sewer pipe 22 flow to a fourth sewer pipe 24 comprises: a second sewer pipe stop cock 42 and a third sewer pipe stop cock 43 for stopping inflow of sewage water into the work section; a bypass drainage system 50 for draining via a front line 52 and a rear line 53 bypassing the work section KK; a basin stop cock 60 for stopping inflow of sewage water from a sewage basin 31 to a drain pipe 25; and a drainage unit 70 for sucking sewage water of the sewage basin 31 into a tank via a basin suction line 82 and discharging sewage water in the tank to the downstream side of the work section KK by a drainage pump equipped with a grinding mechanism which grinds foreign matters in the sewage water.

Description

  The present invention relates to a sewage pipe bypass drainage device that performs drainage by bypassing a work section when performing operations such as cleaning, repair, inspection, and replacement in a sewage pipe buried in the ground.

Conventionally, when cleaning, inspection, repair, replacement, etc. are carried out in a sewer pipe buried in the ground, the sewer pipe is bypassed to bypass the work section so that wastewater does not flow. A drainage device is known (see, for example, Patent Document 1).
The conventional sewage pipe bypass drainage device described in Patent Document 1 is a device that flows sewage by bypassing a work section in a sewage pipe to which a plurality of drainage masses into which domestic wastewater flows is connected via the drainage pipe. .
For this reason, this prior art has a sewage stop cock that stops the upstream and downstream sides of the sewage pipe in the work section, and a sewage pipe on the downstream side by sucking up sewage and the like upstream of the sewage pipe in the work section. A bypass drainage device that bypasses downstream from the stop cock, a mass stop cock that blocks the flow of sewage from each drainage mass into each drain pipe, and a drain stop cock upstream of the work section The sewage flowing upstream is sucked into the vacuum tank through the first suction pipe, and the sewage in each drainage mass is sucked into the vacuum tank through the second suction pipe, and the sewage sucked into the vacuum tank is collected. And a drainage unit for draining downstream of the sewage pipe stop cock on the downstream side of the work section through the discharge pipe by the discharge pump.
The detour drainage device has a submersible pump that can transfer sewage mixed with foreign matter in a manhole connected to the sewer pipe upstream from the work section. A net for removing foreign matter is installed between the sewage pipe on the downstream work section side.

JP 2002-201707 A

However, the conventional sewage pipe bypass drainage apparatus as described above has the following problems to be solved.
In general, large foreign matters contained in the sewage flowing through the sewer pipe are contained in the rainwater flowing from the rainwater mass.
Therefore, in the above-described prior art, sewage in a sewer pipe that may contain large foreign matter is separated from the sewer pipe in the work section using a bypass drainage device equipped with a submersible pump capable of sucking sewage containing foreign matter. I try to get around.
On the other hand, the drainage unit that sucks into the vacuum tank basically collects domestic wastewater that is not contaminated with large foreign matter, and sewage upstream from the drain stop cock from which foreign matter has been removed by a net. Then, the sewage in the vacuum tank is discharged to the sewage pipe downstream from the downstream sewage stop cock by the discharge pump.

  However, some foreign matter may be contained in domestic wastewater and sewage in a sewer pipe that has passed through a net. When the sewage containing the foreign matter is sucked into the vacuum tank, there is a possibility that the discharge pump that discharges the sewage in the vacuum tank to the outside may be clogged with the foreign matter.

  An object of the present invention is to solve the above-described problems, and an object of the present invention is to provide a sewage pipe bypass drainage device that can prevent clogging of a discharge pump in a drainage unit.

In order to achieve the above object, the sewage pipe detour drainage device of the present invention comprises:
A sewage pipe bypass drainage device that bypasses the work section including the drain pipe connected to the drain pipe extending from the sewage mass and flows the sewage in the sewage pipe upstream of the work section to the sewage pipe downstream of the work section. There,
An upstream stop cock that prevents inflow of sewage from the upstream side into the working section;
A downstream stop cock that prevents inflow of sewage from the downstream side to the working section;
Via the detour that connects the upstream side of the upstream stop cock and the downstream side of the downstream stop cock, the sewage on the upstream side bypasses the work section and is drained to the downstream side. Detour drainage,
A mass stop cock that prevents the inflow of sewage from the sewage mass to the drain pipe,
Waste water that sucks the sewage of the sewage mass into the tank via a suction line and discharges the sewage in the tank to the downstream side of the work section by a discharge pump equipped with a pulverization mechanism for pulverizing foreign matter in the sewage. Unit,
It is characterized by having.

The drainage unit preferably includes an abnormality detection means for detecting the occurrence of an abnormality and a notification device for notifying the occurrence of an abnormality via a public line when the abnormality detection of the abnormality detection means is detected.
Moreover, it is preferable that the cover which covers the outer periphery of the drainage unit is provided with a soundproof material at least on the bottom surface.

In the present invention, the sewage sucked into the tank of the drainage unit is discharged to the downstream side of the work section by the discharge pump provided with the crushing mechanism. For this reason, the foreign material contained in the sewage sucked into the tank from the sewage mass is pulverized by the pulverization mechanism when discharged by the discharge pump, and clogging in the discharge pump can be prevented.
Further, by preventing the occurrence of clogging, it is possible to reduce the maintenance work of the discharge unit and improve the durability.

In the case of a device equipped with a notification device, the notification device notifies the occurrence of an abnormality via a public line when an abnormality such as clogging occurs.
Therefore, when an abnormality occurs, the administrator can respond immediately.
In addition, if a soundproofing material is installed on at least the bottom surface of the drainage unit cover, noise and vibration generated in the drainage unit will be absorbed by the soundproofing material on the bottom surface and transmitted to the ground, etc., improving the noise level. Can be planned.

FIG. 1 is an overall explanatory diagram for explaining an example of use of a sewer pipe bypass drainage apparatus according to an embodiment of the present invention. FIG. 2 is an overall system diagram showing a connection state of each line of the sewage pipe bypass drainage device of the embodiment. FIG. 3 is a plan view of a drainage unit used in the sewage pipe bypass drainage apparatus of the embodiment. FIG. 4 is a left side view of a drainage unit used in the sewage pipe bypass drainage apparatus of the embodiment. FIG. 5 is a front view of a drainage unit used in the sewage pipe bypass drainage apparatus of the embodiment. FIG. 6 is a right side view of a drainage unit used in the sewage pipe bypass drainage apparatus of the embodiment. FIG. 7 is a rear view of a drainage unit used in the sewage pipe bypass drainage apparatus of the embodiment. FIG. 8 is a bottom view of a drainage unit used in the sewage pipe bypass drainage apparatus of the embodiment. FIG. 9 is a block diagram showing the input / output relationship of the control unit provided in the drainage unit used in the sewage pipe bypass drainage apparatus of the embodiment. FIG. 10 is a flowchart illustrating a flow of processing of submersible pump control in the sewage pipe bypass drainage device of the embodiment. FIG. 11 is a flowchart showing a flow of vacuum pump control processing in the sewage pipe bypass drainage apparatus of the embodiment. FIG. 12A is a flowchart showing a flow of processing of sewage mass control in the sewage pipe bypass drainage device of the embodiment, and FIG. 12B is a vacuum line control in the sewage pipe bypass drainage device of the embodiment. It is a flowchart which shows the flow of a process of. FIG. 13 is a flowchart showing a flow of processing of the discharge pump control in the sewage pipe bypass drainage device of the embodiment. FIG. 14 is a flowchart illustrating a flow of processing of abnormality determination control in the sewage pipe bypass drainage device of the embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
In describing the sewage pipe bypass drainage apparatus according to the embodiment of the present invention, first, the configuration of the sewage pipe using the sewage pipe bypass drainage apparatus will be described.

  As shown in FIG. 1, a first manhole 11, a second manhole 12, and a third manhole 13 are drilled vertically in the ground, and the lower portions of the manholes 11 to 13 are a first sewer pipe 21 and a second lower hole. The water pipe 22, the third sewer pipe 23, and the fourth sewer pipe 24 are connected in series. In addition, each sewer pipe 21-24 is installed so that dirty water may flow toward the 4th sewer pipe 24 from the 1st sewer pipe 21 on the left side in the figure.

  In such a sewer pipe, in the present embodiment, the third sewer pipe 23 and the third manhole 12 and the third manhole 13 sandwiching the third sewer pipe 23 are used as work sections, and the third sewer pipe 23 is cleaned, inspected, repaired, and replaced. A description will be given assuming that the above operations are performed.

  A plurality of drain pipes 25 are connected to the third sewer pipe 23. Each drain pipe 25 is connected to a domestic sewage mass 31. That is, as shown in FIG. 2, a plurality of drain pipes 25 are connected to the third sewer pipe 23, each drain pipe 25 is connected to a sewage mass 31, and each sewage mass 31 is connected to a kitchen and a toilet of each household. A drainage pipe 26 is connected to flow sewage from the bathroom or the like. In the figure, only two sets of the drain pipe 25 and the sewage mass 31 are illustrated, but actually, a plurality of more than that may be connected. Similarly, the other sewage pipes 21, 22, and 24 are connected to the plurality of sewage masses 31 through the plurality of drain pipes 25, but are not shown.

Next, the configuration of the sewage pipe bypass drainage device of the embodiment will be described.
As shown in FIG. 1, the sewage pipe bypass drainage device of this embodiment includes a first sewage pipe stop cock (upstream stop cock) 41, a second sewage pipe stop cock (upstream stop cock) 42. , A third sewer pipe stop cock (downstream stop cock) 43, a bypass drainage device 50, a mass stopcock 60, and a drainage unit 70.

The first to third sewage pipe stop cocks 41 to 43 are provided in order to stop the sewage from flowing into the third sewage pipe 23 and the second and third manholes 12 and 13 which are the work sections KK. Installed in water pipes 21-24. That is, the first sewage pipe stop cock 41 and the second sewage pipe stop cock 42 are for preventing the inflow of sewage from the upstream to the work section KK. The second sewage pipe stop cock 42 is installed at the downstream end of the second sewage pipe 22. The third sewage pipe stop cock 43 is for preventing the inflow of sewage from the downstream of the work section KK, and is installed at the upstream end of the fourth sewage pipe 24.
In addition, as each sewer pipe stop cock 41-43, it expand | swells and stops water by supplying air through the air hose (illustration omitted) from the compressor 79 (refer FIG. 3) provided in the drainage unit 70. A balloon stopper is used.

  The bypass drainage device 50 includes a submersible pump 51, a front line (detour) 52, and a rear line (detour) 53. In the present embodiment, as shown in FIG. 1 and the like, the bypass drainage device 50 bypasses the sewage flowing into the first manhole 11 from the first sewage pipe 21 through the third sewage pipe 23 serving as the work section KK. The drainage unit 70 is installed to flow into the fourth sewage pipe 24 via a drainage pipe (bypass) 71 described later.

The submersible pump 51 is a small submersible sewage pump having a crushing mechanism, and is installed in the first manhole 11 to transfer the sewage in the first manhole 11 to the drainage unit 70 via the front line 52. As schematically shown in FIG. 3, the drainage unit 70 includes a drainage pipe (detour) 71 that penetrates the drainage unit 70, and the front line 52 is connected to the upstream end of the drainage pipe 71. Yes. On the other hand, one end of the rear line 53 is connected to the downstream end of the drain pipe 71, and the other end passes through the third sewage pipe stop cock 43 and is connected to the fourth sewage pipe 24.
The submersible pump 51 is provided with a submersible pump float switch 103 shown in FIG. 2, and the level of sewage in the first manhole 11 can be detected.

Next, the drainage unit 70 will be described.
As shown in FIG. 1, the drainage unit 70 is used by being installed on the ground in the vicinity of the work section KK, and is supplied with power through a power supply line (not shown) and is also not shown. Electric power is supplied from the drainage unit 70 to the submersible pump 51, a mass suction box 80, which will be described later, and a connecting rod 800 via the power supply line.

Furthermore, as shown in FIGS. 2 and 3, the drainage unit 70 includes a vacuum tank 72 therein.
The vacuum tank 72 is formed in a cylindrical shape, and sucks sewage from the sewage mass 31 and the second sewage pipe 22 with a negative pressure inside by a vacuum pump 73.
A pump suction pipe 73a of the vacuum pump 73 is connected to the upper portion of the vacuum tank 72 as shown in FIG. A labyrinth portion 74 is provided on the upper portion of the vacuum tank 72 so that the sewage sucked into the vacuum tank 72 is not sucked into the vacuum pump 73.

  On the other hand, a tank suction pipe 72 a is connected in the vicinity of the side opposite to the suction side by the vacuum pump 73 in the labyrinth portion 74 of the vacuum tank 72. The opposite end of the tank suction pipe 72a is connected to a connection box 800 shown in FIG.

In addition, as shown in FIG. 3, the pump suction pipe 73a is provided with a three-way valve 73b that opens to the atmosphere. The three-way valve 73b has a role of opening the vacuum tank 72 to the atmosphere when the vacuum pump 73 is urgently stopped, and opening the vacuum tank 72 to the atmosphere, and stopping suction of sewage from the connection line 81.
Further, the vacuum tank 72 is connected to the drain pipe 71 via a drain pipe 72d. The drain pipe 72d is for discharging the sewage in the tank when the vacuum tank 72 is inspected, and can be opened and closed by a normally closed manual valve.

As shown in FIG. 2, the connection box 800 connected to the vacuum tank 72 via the connection line 81 is further connected to the mass suction box 80 and connected to the second sewer pipe 22 via the vacuum line 83. It is connected.
That is, the connection box 800 branches the connection line 81 into a plurality, one of the branches is connected to the vacuum line 83 via the vacuum line opening / closing valve 120, and the other branch is connected to the mass suction line (suction line). ) And connected to the mass suction box 80 via 82.
The vacuum line opening / closing valve 120 is a normally closed valve connected to the vacuum line 83, and opens the second sewage pipe 22 upstream of the second sewage pipe stop cock 42 by opening the vacuum line 83 and the vacuum line 83. The vacuum tank 72 is connected via a connection line 81.

  In FIG. 2, only two branch portions connected to the mass suction line 82 are shown. And this branching part is normally obstruct | occluded with a stopper, a cover, etc., and the sub mass suction line 82b is connected and used according to the number of the sewage mass 31 to connect. Therefore, in FIG. 2, since two places are shown as the sewage mass 31 to be connected, only two are shown as the branching portion and the auxiliary mass suction line 82b, and the others are not shown.

  As shown in FIG. 2, the mass suction box 80 is installed independently for each sewage mass 31, and is connected to each sewage mass 31 via a mass suction line 82. Further, the mass suction box 80 is provided with a mass suction line opening / closing valve 110 that opens and closes between the suction lines 82 and 82b.

  A mass float switch 102 that outputs a signal when the water level of the sewage mass 31 reaches a set height is installed at the tip of the mass suction line 82. The signal of the mass float switch 91 is input to the control unit 100 installed in the drainage unit 70 via the signal terminal 80a of the mass suction box 80, the signal terminal 800a of the connection box 800, and the signal line 190.

As will be described in detail later, the control unit 100 sucks the sewage into the vacuum tank 72 when the water level of the sewage mass 31 reaches a predetermined level by the opening / closing control of the mass suction line opening / closing valve 110 and the vacuum line opening / closing valve 120. And the control which attracts | sucks the sewage of the 2nd sewer pipe 22 for every set time is performed.
In each sewage mass 31, the inlet of the drain pipe 25 is closed by a mass stop cock 60. The mass stop cock 60 also expands and stops when air is supplied from the compressor 79 (see FIG. 3) via an air hose (not shown), similarly to the drain stop cocks 41 to 43. A water balloon stopper is used.

As described above, the sewage sucked into the vacuum tank 72 is discharged to the drain pipe 71 by the discharge pump 75, and the fourth sewage pipe downstream from the third sewage pipe stop cock 43 through the rear line 53. 24. The discharge pump 75 is installed at the bottom of the vacuum tank 72 as shown in FIG. A discharge pipe 76 is connected to the discharge side of the discharge pump 75, and the discharge pipe 76 extends outside the vacuum tank 72 and is connected to the drain pipe 71 as shown in FIGS. 3 and 7. It is connected. A check valve 76 a is provided in the middle of the discharge pipe 76 so that the sewage in the drain pipe 71 does not flow back to the vacuum tank 72 through the discharge pipe 76.
In the present embodiment, the discharge pump 75 is generally called a cutter pump, and has a crushing mechanism 75a such as a cutting blade and a crushing impeller inside, and uses a pump capable of finely crushing solids contained in sewage. (See FIG. 5).

As shown in FIG. 7, a window 77 through which the inside of the vacuum tank 72 can be seen is provided on the side surface of the drainage unit 70.
Further, as shown in FIG. 6, an operation panel 101 is provided on the side surface of the drainage unit 70, and a power distribution panel 701 for connecting wirings is provided below the operation panel 101. The power distribution panel 701 is covered by the door 702 except for the lower part, and the signal line 190 and the power supply line (not shown) connected to the power distribution panel 701 are routed through the lower part not covered by the door 702. Moreover, as shown in FIG. 4, the ventilation fan 70f is provided in the side surface on the opposite side to where the operation panel 101 is provided in the drainage unit 70. As shown in FIG.
In addition, a gantry 78 is provided at the bottom of the drainage unit 70 to support the unit. As shown in FIG. 8, the gantry 78 includes a skeleton member 78f having a ladder shape and legs, and a bottom plate (not shown) disposed on the upper surface of the skeleton member 78f and covering the entire bottom surface of the unit. Yes. The entire inner surface of the bottom plate is covered with a soundproof material 78a.

Next, the control unit 100 will be described with reference to FIG.
An operation panel 101, a mass float switch 102, a submersible pump float switch 103, an upper level sensor 104, an intermediate level sensor 105, a lower level sensor 106, a pressure sensor 107, and an abnormality detection sensor 108 are connected to the input side of the control unit 100. Has been.
On the other hand, the submersible pump 51, vacuum pump 73, discharge pump 75, mass suction line opening / closing valve 110, vacuum line opening / closing valve 120, and notification device 130 are connected to the output side of the control unit 100.

  The operation panel 101 is for performing operations such as driving and driving stop of the entire apparatus, and is provided with a plurality of switches such as a start switch, a stop switch, and a mode change switch (not shown). The mode changeover switch is a switch for changing the drive pattern according to the change in the amount of sewage in a general time zone depending on the usage time zone of the device, morning, daytime, night, midnight, or the like. A detailed description of the difference between the drive patterns is omitted.

  The mass float switch 102 is attached to the tip of the mass suction line 82 and is connected to the control unit 100 via the signal line 190, the mass suction box 80, and the signal terminals 80 a and 800 a of the connection box 800. Therefore, when the apparatus is used, the mass float switch 102 is installed in the sewage mass 31 together with the tip of the mass suction line 82, and a signal indicating the water level of the sewage mass 31 (in this embodiment, the set water level is reached). Is input to the control unit 100.

  The submersible pump float switch 103 is installed in the first manhole 11 together with the submersible pump 51, and in response to a signal indicating the water level of the first manhole 11, a signal (in this embodiment, indicates that the set water level has been reached). Signal).

The upper level sensor 104, the intermediate level sensor 105, and the lower level sensor 106 are installed in the vacuum tank 72 as shown in FIG.
The lower level sensor 106 is a sensor that is installed at the lower part of the vacuum tank 72 and detects that the level of sewage in the vacuum tank 72 has dropped to a minimum water level that can be discharged by the discharge pump 75. As will be described later, when the level of sewage in the vacuum tank 72 is lowered to the level detected by the lower level sensor 106, the control unit 100 stops the discharge of sewage by the discharge pump 75.

  The intermediate level sensor 105 is provided in an intermediate portion of the vacuum tank 72 and detects that the water level of the vacuum tank 72 has reached a water level at which discharge by the discharge pump 75 is started. As will be described later, when the level of sewage in the vacuum tank 72 rises to the level detected by the intermediate level sensor 105, the control unit 100 drives the discharge pump 75 to move the sewage in the vacuum tank 72 downstream from the work section KK. To the fourth sewer pipe 24.

  The upper level sensor 104 is installed in the upper part of the vacuum tank 72 and detects an abnormal water level. As will be described later, when the upper level sensor 104 detects an abnormal water level, the control unit 100 urgently stops the vacuum pump 73 and stops the suction of sewage into the vacuum tank 72.

The pressure sensor 107 is a sensor that is installed in the vacuum tank 72 and detects the pressure in the vacuum tank 72.
The abnormality detection sensor 108 is a sensor provided for detecting an abnormality in the mass suction line opening / closing valve 110 and the stop cocks 41, 42, 43, etc. in the mass suction box 80, and will be described in detail later. .

Next, the mass suction line opening / closing valve 110 and the vacuum line opening / closing valve 120 connected to the output side of the control unit 100 will be described.
The mass suction line opening / closing valve 110 is a normally closed valve, and connects the sewage mass 31 and the vacuum tank 72 via the connection line 81, the auxiliary mass suction line 82b, and the mass suction line 82 by opening the valve. The sewage of the mass 31 is sucked into the vacuum tank 72. An open / close signal from the control unit 100 to the mass suction line open / close valve 110 is transmitted via the signal terminals 800a and 80a.
As described above, only two sets of the auxiliary mass suction line 82b, the mass suction box 80, the mass suction line opening / closing valve 110, and the mass suction line 82 connected to the connection box 800 are shown in FIG. These can be connected to the connection box 800 more than that (for example, about 10). Then, according to the number of sewage masses 31 connected to the work section KK, mass suction boxes 80 are installed, and each mass suction line 82 is installed in each sewage mass 31.

Next, returning to FIG. 9, the notification device 130 will be described.
The notification device 130 is a device for reporting an abnormality to a preset registrant via a public line 200 including a telephone line and the Internet when an abnormality described later occurs in the sewage pipe bypass drainage device. In the present embodiment, a mail that reports an abnormality is distributed to the plurality of cellular phones 202 and the personal computer 203 of the registrant via the public line 200. In addition to mail, the registrant's fixed telephone 201 and mobile phone 202 may be notified of the abnormality by voice guidance, or the abnormality may be reported by FAX.

Next, the control performed in the control unit 100 will be described based on the flowcharts of FIGS.
(Control of submersible pump 51)
FIG. 10 shows a drive control process for the submersible pump 51.
This control starts when a drive start switch (not shown) is turned on by the operation panel 101 (see FIG. 9), and ends when a drive stop switch (not shown) is turned on.

  The submersible pump 51 determines whether or not the submersible pump float switch 103 is turned on in S511, that is, whether or not the level of sewage in the first manhole 11 is higher than a set value. If it is higher than the value, the submersible pump 51 is driven (S512), and if it is OFF, the submersible pump 51 is stopped (S513).

Therefore, when the water level of the sewage in the first manhole 11 becomes higher than the set value during use of the apparatus, the submersible pump 51 is driven until the water level becomes lower than the installation value.
When the submersible pump 51 is driven, the sewage in the first manhole 11 passes from the front line 52 through the drain pipe 71 of the drainage unit 70, passes through the rear line 53, and is downstream of the third sewer pipe stop cock 43. To the fourth sewer pipe 24.

(Vacuum pump drive control)
FIG. 11 shows the drive control process of the vacuum pump 73. This control also starts when a drive start switch (not shown) is turned on by the operation panel 101 (see FIG. 9), and ends when a drive stop switch (not shown) is turned on.
In the drive control of the vacuum pump 73, the control unit 100 performs control to adjust the pressure in the vacuum tank 72 to a set negative pressure based on the pressure in the vacuum tank 72 detected by the pressure sensor 107.
That is, as shown in the flowchart of FIG. 11, in step S731, it is determined whether the detected pressure Pt of the pressure sensor 107 is equal to or higher than a preset first threshold value Pset1 (for example, a value of about Pset1 = −700 mmHg). If Pt ≧ Pset1, the process proceeds to step S732, and the vacuum pump 73 is driven.

In the next step S733, it is determined whether or not the detected pressure Pt is equal to or lower than a preset second threshold value Pset2 (Pset2 <Pset1, where Pset2 is a value of about −760 to 800 mmHg, for example). Is greater than the second threshold value Pset2, the driving of the vacuum pump 73 is continued. When the detected pressure Pt becomes equal to or lower than the second threshold value Pset2, the process proceeds to step S734 and the vacuum pump 73 is stopped.
Therefore, the vacuum tank 72 is always maintained at a negative pressure between the first threshold value Pset1 and the second threshold value Pset2 while the apparatus is being driven.

(Suction and discharge in the vacuum tank 72)
FIG. 12 shows the flow of processing for suction and discharge control in the vacuum tank 72.
This control also starts when a drive start switch (not shown) is turned on by the operation panel 101 (see FIG. 10), and ends when a drive stop switch (not shown) is turned on. Further, when suctioning the vacuum tank 72, the sewage mass control shown in FIG. 12 (a) and the vacuum line control shown in FIG. 12 (b) are executed in parallel.

First, the sewage mass control will be described. This sewage mass control is a control for sucking the sewage mass 31 into the vacuum tank 72 when sewage of a predetermined water level is accumulated in the sewage mass 31.
In this sewage mass control, it is determined whether or not any of the plurality of mass float switches 102 is turned on in step S111. If it is determined to be ON in step S111, the process proceeds to step S112, and the mass suction line opening / closing valve 110 connected to the mass suction line 82 in which the mass float switch 102 that is ON is installed is opened. Let me speak.
Therefore, the sewage collected in the sewage mass 31 is sucked into the vacuum tank 72 via the mass suction line 82, the mass suction box 80, the auxiliary mass suction line 82 b, the connection box 800, and the connection line 81.

  Then, the opening of the mass suction line opening / closing valve 110 is continued until the mass float switch 102 turned on is turned off based on the process of step S113, and when the mass float switch 102 is turned off, the process goes to step S114. Then, the mass suction line opening / closing valve 110 which has been opened is closed.

  As described above, when sewage accumulates in any of the plurality of sewage masses 31, the sewage mass 31 is sucked into the vacuum tank 72 until the water level of the sewage masses 31 reaches a set value. This operation is performed independently for each sewage mass 31. The mass float switch 102 is preferably provided with hysteresis so that the water level that is turned off when the water level is lowered is lower than the water level that is turned on when the water level is raised.

Next, the vacuum line control shown in FIG.
This vacuum line control is a control for sucking the sewage accumulated in the second sewer pipe 22 through the vacuum line 83 every time a predetermined time elapses.

In this case, first, in step S121, it is determined whether or not the count value Tn1 of the first timer built in the control unit 100 exceeds the preset first set time Tset1, and exceeds the first set time Tset1. In step S122, the vacuum line opening / closing valve 120 is opened.
Therefore, the sewage collected in the two sewage stop cocks 41 and 42 in the second sewage pipe 22 is sucked into the vacuum tank 72 via the vacuum line 83, the connection box 800, and the connection line 81.

  Further, the counting of the second timer is started from the time when the suction is started. Then, based on step S123, the vacuum line opening / closing valve 120 is kept open until the count value Tn2 reaches a preset second set time Tset2 (step S123 → S122), and the count value Tn2 is the second value. When the set time Tset2 is reached, the process proceeds to step S124, the vacuum line opening / closing valve 120 is closed, and the suction is stopped.

The count of the first timer is started from the time when the operation of the apparatus is started by operating the operation panel 101. When the count value Tn1 of the first timer reaches the first set time Tset1, it is cleared and counted again from zero.
The counting of the second timer is started when the vacuum line opening / closing valve 120 is opened as described above. When the count value Tn2 of the second timer reaches the second set time Tset2, it is cleared.
Therefore, the sewage in the second sewage pipe 22 is sucked for a set time (Tset2) every fixed time (Tset1).

(Discharge of sewage in vacuum tank)
Next, control for discharging the sewage collected in the vacuum tank 72 to the fourth sewer pipe 24 will be described based on the flowchart of FIG. This control also starts when a drive start switch (not shown) is turned on by the operation panel 101 (see FIG. 10), and ends when a drive stop switch (not shown) is turned on.
This control is performed based on the detection of the intermediate level sensor 105 and the lower level sensor 106 installed in the vacuum tank 72.
That is, in step S751, it is determined whether the intermediate level sensor 105 is ON. If it is ON, the process proceeds to step S752, and the discharge pump 75 is driven. After the discharge pump 75 is driven, it is determined in step S753 whether the lower level sensor 106 is OFF, that is, whether the water level in the vacuum tank 72 has decreased until the lower level sensor 106 is turned OFF. Step S752 (driving pump 75 driving) is repeated until
Then, when the lower level sensor 106 is turned OFF, the process proceeds to step S754, and the discharge pump 75 is stopped.

  Based on the above processing, every time the intermediate level sensor 105 is turned ON due to the rise in the water level of the vacuum tank 72, the discharge pump 75 is driven, and the sewage in the vacuum tank 72 is discharged through the discharge pipe 76 to the drain pipe 71. To be discharged. Further, the sewage discharged to the drain pipe 71 is discharged to the fourth sewer pipe 24 via the rear line 53.

  Further, in the present embodiment, when the discharge pump 75 drains the sewage in the vacuum tank 72 to the drain pipe 71 as described above, the foreign matter contained in the sewage is crushed by the crushing mechanism 75a. Therefore, even if foreign matter is contained in the domestic wastewater of the sewage mass 31 or the sewage that has flowed into the second sewage pipe 22 after passing through the first sewage pipe stop cock 41, the discharge pump 75 does not clog. It is discharged smoothly.

(Abnormality judgment control)
Next, the abnormality determination control will be described with reference to the flowchart of FIG. This control also starts when a drive start switch (not shown) is turned on by the operation panel 101 (see FIG. 10), and ends when a drive stop switch (not shown) is turned on.
In this abnormality determination control, it is determined whether or not an abnormality is detected in the first step S721. If an abnormality is detected, the process proceeds to the next step S722, and if no abnormality is detected, the state returns. In the control unit 100, the part that performs the abnormality detection determination and the sensor used for the determination correspond to the abnormality detection means.
In step S722, which proceeds when an abnormality is detected, processing corresponding to the abnormality is executed, and further, the process proceeds to the next step S723, where the notification device 130 notifies the occurrence of the abnormality.

Next, abnormality detection, abnormality handling processing, and abnormality notification will be described.
In the present embodiment, as the abnormality detection, the abnormality of the vacuum tank 72, the abnormality of the mass suction box 80, and the abnormality of each of the stop cocks 41 to 43, 60 are detected.
First, the abnormality of the vacuum tank 72 is detected by the upper level sensor 104 installed in the vacuum tank 72. That is, when the waste water is not discharged due to the abnormality of the discharge pump 75 and the water level of the vacuum tank 72 rises abnormally and the upper level sensor 104 switches from OFF to ON, it is determined that an abnormality has occurred in the vacuum tank 72. To do.
In this case, as an abnormality handling process corresponding to the abnormality, first, the vacuum pump 73 and the discharge pump 75 are urgently stopped. Then, the three-way valve 73b is opened to the atmosphere. Further, the sewage mass control for sucking the sewage of the sewage mass 31 and the vacuum line control for sucking the sewage of the second sewage pipe 22 every set time are stopped.

Further, as an example of the abnormality of the mass suction box 80, a sensor (this corresponds to an abnormality detection sensor) that can detect the normal opening / closing of the mass suction line opening / closing valve 110 is installed, and the control unit 100 is connected to the mass suction line opening / closing valve 110. If the suction line opening / closing valve 110 is instructed to open but is not opened due to clogging of foreign matter, or if the valve is instructed to close but is not closed due to clogging of foreign matter, etc., it is determined as abnormal. . Alternatively, the control unit 100 may open the mass suction line opening / closing valve 110 without detecting such a sensor when detecting an abnormal opening of the mass suction line opening / closing valve 110 due to clogging of foreign matter. When the command is issued but the mass float switch 102 is not switched, it can be determined that the mass suction box 80 is not functioning normally.
In this case, the output of the valve opening command of the mass suction line opening / closing valve 110 is stopped as an abnormality handling process corresponding to the abnormality.

The abnormality of each stop cock 41-43,60 is a pressure sensor (this is for abnormality detection) which detects the pressure in the air hose which connected the compressor 79 and each stopcock 41-43,60 in the drainage unit 70 which abbreviate | omitted illustration. If the detected pressure of this pressure sensor drops to an abnormal value, it is determined that an abnormality has occurred.
In this case, as an abnormality handling process corresponding to an abnormality, air is supplied from the compressor 79 to an air hose (not shown) whose detected value has decreased to an abnormal value, and water stop is surely performed.
Note that the abnormality notification executed in step S723 is notified to the registered mobile phone 202 and personal computer 203 by mail as described above. In this case, it is preferable to report the contents of the detected abnormality.

(Operation of the embodiment)
Below, the usage method of the sewer pipe bypass drainage apparatus of embodiment is demonstrated.
First, the drainage unit 70 is installed on the ground between the second manhole 12 and the third manhole 13 arranged upstream and downstream of the third sewage pipe 23 as the work section KK. A mass suction box 80 is installed in accordance with each sewage mass 31 connected to the third sewer pipe 23, and a connection box 800 is installed between each mass suction box 80 and the drainage unit 70.

  Then, the front line 52, the rear line 53, and the connection line 81 are connected to the drainage unit 70. Further, the submersible pump 51 is connected to the front line 52, and the power supply line (not shown) and the signal line 190 of the submersible pump float switch 103 provided in the submersible pump 51 are connected to the power distribution panel 701 of the drainage unit 70. To do. Then, the mass suction box 80 and the drainage unit 70 are connected by a signal line 190 and a power supply line (not shown).

  On the other hand, a mass suction line 82 and a secondary mass suction line 82 b are connected to the mass suction box 80. Then, each secondary mass suction line 82 b is connected to the connection box 800, and the vacuum line 83 is connected to the vacuum line opening / closing valve 120 of the connection box 800. Further, the signal line 190 connected to the mass float switch 102 attached to the tip of the mass suction line 82 is connected to the signal terminal 800 a of the connection box 800.

Next, the first sewage pipes are stopped at both upper and lower ends of the second sewage pipe 22 so that the sewage does not flow into the third sewage pipe 23 as the work section KK and the second and third manholes 12 and 13 upstream and downstream thereof. A stopper 41 and a second drain pipe stop cock 42 are installed. At this time, a vacuum line 83 is connected to the second sewer pipe stop cock 42.
Furthermore, in each sewage mass 31, the mass stop cock 60 is installed in the opening part of the drain pipe 25. FIG.
By the above work, sewage is prevented from flowing into the work section KK.
Then, the 3rd sewer pipe stop cock 43 which connected the rear line 53 to the upstream edge part of the 4th sewer pipe 24 downstream of the work area KK is installed.

  Then, the submersible pump 51 connected to the front line 52 is installed in the first manhole 11. When the drainage unit 70 is activated in this state, the submersible pump 51 causes the sewage in the first manhole 11 upstream of the work section KK to flow around the work section KK to the fourth sewage pipe 24 downstream thereof.

Further, the sewage of the sewage mass 31 connected to the third sewage pipe 23 in the work section KK is sucked into the vacuum tank 72 when the level of the sewage mass 31 reaches the set water level.
Further, the sewage flowing into the second sewage pipe 22 is also sucked into the vacuum tank 72 every set time.
The sewage sucked into the vacuum tank 72 is discharged from the drain pipe 71 through the rear line 53 to the fourth sewage pipe 24 by the discharge pump 75 every time the level of the sewage rises.

Therefore, operations such as cleaning, inspection, repair, and replacement can be performed in the third sewage pipe 23 in the work section KK without stopping household drainage and using sewerage.
Further, the suction of the sewage in the first manhole 11, the suction of the sewage in the sewage mass 31, and the suction of the sewage in the second sewer pipe 22 by the submersible pump 51 are continuously performed during the construction by the automatic control by the control unit 100. .

  In this case, since each sewage is not exposed to the outside, it is difficult to give an odor of the sewage to the outside, and it is difficult to adversely affect an external environment such as a home. At the same time, workers can avoid direct contact with sewage and sludge, and the work environment is excellent.

(Effect of embodiment)
The effects of the sewage pipe bypass drainage device of the embodiment will be listed below.
1) In the present embodiment, a cutter pump including a crushing mechanism 75a is used as the discharge pump 75 that discharges sewage in the vacuum tank 72 to the outside.
Therefore, even if foreign matter is mixed in the domestic waste water sucked from the sewage mass 31 or the sewage sucked from the second sewage pipe 22 upstream of the work section KK, the foreign matter is crushed by the crushing mechanism 75a, and the discharge pump 75 Can prevent clogging.
Furthermore, by preventing this clogging, the maintenance work of the vacuum tank 72 can be reduced, and the durability of the vacuum tank 72 can be improved.

2) In the embodiment, when an abnormality occurs, the notification device 130 notifies the plurality of mobile phones 202 and the personal computer 203 of the occurrence of the abnormality by mail via the public line 200.
In this way, since the abnormality occurrence is notified to the plurality of mobile phones 202 and the personal computer 203 by the mail that remains in the record, the construction manager knows the abnormality occurrence more reliably than the case of only the notification such as voice. It is possible to cope with it and maintainability can be improved.
Furthermore, if it is possible to report whether the abnormality of the vacuum tank 72, the mass suction box 80, or the water stopcocks 41 to 43, 60 is abnormal according to the detected content of the abnormality, the manager can more quickly. And accurate response is possible.
In addition, if the notification by voice guidance or FAX is also performed in parallel, the administrator can reliably report the abnormality.
In particular, in the present embodiment, as an abnormality detection, an opening / closing abnormality due to clogging of foreign matter in the mass suction line opening / closing valve 110 is detected. As a result, it is possible to detect an abnormality caused by the foreign matter before reaching the vacuum tank 72 as in 1) above, and to deal with this, and the reliability with respect to the foreign matter contained in the household wastewater becomes higher.

3) In the embodiment, the soundproof material 78 a is provided inside the bottom plate of the gantry 78.
Therefore, the vibration transmitted from the lower side of the drainage unit 70 to the ground or the like is absorbed, and the noise level can be improved efficiently.

4) In the embodiment, the auxiliary mass suction line 82b connected to each mass suction box 80, the signal line 190 of the mass float switch 102 for detecting the water level of the sewage mass 31, and the signal connected to the mass suction line opening / closing valve 110 The lines 190 are collectively connected to the connection box 800. In addition, a vacuum line opening / closing valve 120 is installed in the connection box 800.
Therefore, the connection of the signal line 190 for communicating with the control unit 100 and each of the valves 110 and 120 and the mass float switch 102 can be collectively performed by one signal terminal 800a. The wiring work of the line 190 can be simplified.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to such embodiment, A various deformation | transformation and substitution can be added in the range which does not deviate from the summary of this invention.

  In the embodiment, the abnormality detection means detects the rise of the water level in the vacuum tank, the abnormality of the mass suction line opening / closing valve, and the abnormality of each stop cock, but the detection of the abnormality is limited to these two. There is nothing. For example, a temperature abnormality in the vacuum pump or the discharge pump may be detected, an abnormality in the flow rate may be detected based on a flow rate in the detour, or a pressure abnormality in the vacuum tank may be detected.

  Further, in the embodiment, the suction of the sewage in the second sewer pipe by the vacuum line is sucked for a set time every fixed time, but is not limited to this. For example, the water level of the second sewer pipe may be detected, and suction may be performed according to this water level.

  In the embodiment, the soundproofing material is installed inside the cover (stand) that covers the bottom surface of the drainage unit. However, the installation position of the soundproofing material is not limited to the bottom surface. For example, when it is installed on the side surface or top surface in addition to the bottom surface, the noise level can be further improved.

  Further, in the embodiment, the example in which the first sewer pipe stop cock is used in series upstream of the second sewer pipe stop cock as the upstream stop cock of the work section KK is shown. Instead of the water pipe stop cock, a net may be used as in the prior art.

  Moreover, in the embodiment, as an alternative route that bypasses the work section, the front line, the drain pipe, and the rear line are used, and the example via the drain pipe installed in the drain unit is shown, but is not limited thereto, The detour may be provided independently outside the drainage unit. In this case, the sewage from the discharge pump may be delivered to this external detour, or may be discharged to the downstream side of the work section independently of the detour.

11 1st manhole 12 2nd manhole (work section)
13 Third manhole (work section)
21 1st sewer pipe (upstream sewer pipe)
22 Second sewer pipe 23 Third sewer pipe (work section)
24 4th sewer pipe (downstream sewer pipe)
25 Drain pipe 31 Sewage mass 41 First sewer pipe stopcock (upstream stopcock)
42 Second sewer pipe stopcock (upstream stopcock)
43 Third sewer pipe stopcock (downstream stopcock)
50 Detour drainage device 51 Submersible pump 52 Front line (detour)
53 Rear line (bypass)
60 Mass stop cock 70 Drain unit 71 Drain pipe (bypass)
72 Vacuum tank 73 Vacuum pump 75 Discharge pump 75a Crushing mechanism 78 Mount (bottom)
78a Soundproof material 80 Mass suction box 82 Mass suction line (suction line)
100 Control unit (abnormality detection means)
104 Upper level sensor (abnormality detection means)
108 Abnormality detection sensor (abnormality detection means)
130 Notification device

Claims (3)

A sewage pipe bypass drainage device that bypasses the work section including the drain pipe connected to the drain pipe extending from the sewage mass and flows the sewage in the sewage pipe upstream of the work section to the sewage pipe downstream of the work section. There,
An upstream stop cock that prevents inflow of sewage from the upstream side into the working section;
A downstream stop cock that prevents inflow of sewage from the downstream side to the working section;
Via the detour that connects the upstream side of the upstream stop cock and the downstream side of the downstream stop cock, the sewage on the upstream side bypasses the work section and is drained to the downstream side. Detour drainage,
A mass stop cock that prevents the inflow of sewage from the sewage mass to the drain pipe,
Waste water that sucks the sewage of the sewage mass into the tank via a suction line and discharges the sewage in the tank to the downstream side of the work section by a discharge pump equipped with a pulverization mechanism for pulverizing foreign matter in the sewage. Unit,
A sewage pipe bypass drainage device characterized by comprising:   The said drainage unit is provided with the abnormality detection means which detects abnormality occurrence, and the notification apparatus which notifies abnormality occurrence via a public line at the time of abnormality detection of this abnormality detection means. The sewage pipe bypass drainage device described.   The sewer pipe bypass drainage device according to claim 1 or 2, wherein a soundproof material is installed on at least a bottom surface of the cover that covers the outer periphery of the drainage unit.