JP4205362B2 - Waste water diverter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a diverter for wastewater.
[0002]
[Prior art]
In shield construction, when it is known in advance that the shield machine will cut structures such as piles embedded in the ground, instead of steel as the core material of the interference part with the shield machine, For example, FRP (fiber reinforced plastics) as disclosed in Japanese Patent Application Laid-Open No. 2000-351858 may be used.
By the way, when cutting the FRP of the structure with a shield machine, the excavated earth and the concrete block of the buried structure (hereinafter referred to as earth and sand), FRP, etc., are contained in the wastewater transported from the cutter head to the subsequent processing equipment. Is included. These waste mud water is divided into a supernatant mud water, earth and sand, and FRP by a flow divider 10a as shown in FIG. 2, and the supernatant mud water is provided in the upper part of the flow divider main body 1a. The soil and sand and FRP were discharged from the sediment discharge unit 3a provided below the supernatant mud discharge unit 2a.
[0003]
[Problems to be solved by the invention]
However, there has been a problem that soil and sand and FRP are entangled with each other in the mud to form a large lump and clog the mud pipe. Moreover, in order to prevent clogging of the sludge drain pipe, a method of removing a gravel removing device and FRP accumulated in the gravel trapping equipment periodically can be considered. Because it was necessary to stop the mud, we had to stop the shield machine.
[0004]
Therefore, an object of the present invention is to provide a diverter for diverting mud water without clogging the mud pipe and without stopping the excavation of the shield machine.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the invention described in claim 1 is, for example, as shown in FIG.
A current divider body 1 for taking in the mud discharged from the mud pipe connected to the shield machine;
An inflow pipe 11 connected to a sludge pipe connected to a shield machine, provided on the inner bottom surface of the flow divider body, and for taking in the muddy water into the flow divider body;
A supernatant mud drainage unit 2 connected to the flow divider main body and for discharging the supernatant mud water taken into the flow divider main body;
A sediment discharge unit 3 connected to the flow distributor main body below the supernatant mud water discharge unit, and discharges the sediment in the waste mud water taken into the flow distributor main body,
A drainage water diverter 10 comprising:
The diverter body is provided with an FRP takeout section 4 for taking out FRP in the mudwater taken into the diverter body at a position lower than the supernatant mudwater discharge section and higher than the earth and sand discharge section. It is characterized by being.
[0006]
According to the first aspect of the present invention, since the FRP take-out portion is provided at a position lower than the supernatant mud water discharge portion and higher than the sediment discharge portion, the earth and sand in the waste mud water are separated, In addition, the earth and sand and the FRP are not entangled with each other so that the drainage pipe is not clogged, and the excavation of the shield machine is not stopped.
[0007]
In the invention according to claim 2, for example, as shown in FIG. 1, in the wastewater diverter according to claim 1, the FRP take-out part is provided with a lid part 42 that can be opened and closed at the tip part. An opening / closing valve 43 is provided in the interior spaced apart from the lid.
[0008]
According to the second aspect of the present invention, since the lid portion and the opening / closing valve are provided apart from each other in the FRP take-out portion, when the FRP is deposited on the tip portion in the FRP take-out portion, the open / close valve is opened. By closing and opening the lid portion, FRP accumulated between the lid portion and the open / close valve can be taken out in a state where the discharge of the waste mud water is blocked. Therefore, the FRP can be taken out without stopping the shield machine.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an embodiment according to the present invention will be described in detail with reference to the drawings.
First, the configuration of the shunt will be described.
As shown in FIG. 1, the flow divider 10 diverts the drained mud water containing FRP discharged from the shield machine. The flow distributor main body 1, the supernatant mud water discharge unit 2, the sediment discharge unit 3, and the FRP take-out Part 4 and the like.
[0010]
The flow divider main body 1 takes in the mud water in order to divert and discharge the mud water discharged from the shield machine. An inflow pipe 11 is provided on the inner bottom surface of the flow divider body 1 for taking in the mud water. The inflow pipe 11 is selected to have a diameter corresponding to the flow speed of the inflowing mud water, and plays a role of adjusting the flow speed suitable for the diversion. Also, one end of the inflow pipe 11 is connected to a sludge pipe that protrudes from the lower side surface (the lower left side surface portion in FIG. 1) of the flow distributor main body 1 and is connected to the shield machine via the flange 13, and the other end portion is slightly It is bent upward and is open toward the FRP takeout part 4. In addition, inspection holes 12 for inspecting the inside of the flow divider body 1 are formed on the outer surface of the flow distributor body 1 (two places in FIG. 1), and are covered with lids except during inspection.
[0011]
The supernatant mud water discharge part 2 discharges the supernatant mud water of the waste mud water, and is attached at a position higher than the earth and sand discharge part 3 and the FRP take-out part 4. The supernatant mud water discharge part 2 is configured such that one end of a bend pipe 22 is connected via a flange 21, and a reducer pipe 24 is connected to the other end of the bend pipe 22 via a flange 23. The reducer pipe 24 is connected to a circulation pump (not shown) for feeding the supernatant mud water to the cutter head.
[0012]
The earth and sand discharging unit 3 discharges excavated earth and sand in the mud water and the cut concrete lump (hereinafter referred to as earth and sand), and is attached to the lower side surface of the shunt body 1. The earth and sand discharging part 3 is configured by connecting one end of a reducer pipe 32 via a flange 31. In addition, the other end part of the reducer pipe | tube 32 is connected to the mud feed pump (not shown) for sending mud to subsequent facilities, such as a sediment processing plant.
[0013]
The FRP takeout part 4 takes out the FRP in the waste mud water, is formed in a cylindrical shape, is lower than the supernatant mud water discharge part 2 and is higher than the earth and sand discharge part 3, and the base end part is the shunt body 1. The shunt main body 1 is joined in a state of being inserted therein. Further, the FRP take-out portion 4 is attached so as to face the other end portion of the inflow pipe 11 bent slightly upward. Moreover, the front-end | tip part of the FRP taking-out part 4 is formed so that it may become a cross section smaller than a base end part, and the cover part 42 which can be opened and closed is attached to the front-end | tip part. Further, an open / close valve 43 capable of opening and closing the inside of the FRP take-out portion 4 is attached inside the space apart from the lid portion 42.
[0014]
Next, a method for diverting mud drainage using the flow divider 10 will be described.
First, the mud drained from the shield machine is sent to the flow divider 10 by a pump and taken into the flow divider body 1 from the inflow pipe 11.
Next, the circulating pump is started to discharge the supernatant mud water from the supernatant mud water discharge unit 2, and the mud pump is started to discharge the sediment and the like in the mud water from the sediment discharge unit 3. The supernatant mud discharged from the flow divider 10 is sent to the cutter head by a circulation pump and reused, and the earth and sand are sent to a subsequent earth and sand treatment facility by the mud pump and processed.
Further, while excavating the shield machine, after closing the on-off valve 43 after an appropriate time, the lid 42 is opened, and the FRP accumulated in the FRP take-out portion 4 is taken out.
Note that the circulation pump and the mud pump may be activated before taking the mud water into the flow distributor main body 1 or may be activated after the flow divider main body 1 is filled.
[0015]
According to the flow divider 10 of the present embodiment, the discharged mud water that has flowed in from the inflow pipe 11 is discharged in the flow distributor main body 1, and the FRP having a specific gravity between the supernatant mud water and the earth and sand is the FRP take-out portion. 4 flows in the upper right direction in FIG. 1, and earth and sand having a specific gravity larger than the supernatant mud water flows toward the bottom of the flow distributor main body 11 (in the lower right direction in FIG. 1). Moreover, the supernatant mud having the smallest specific gravity flows toward the supernatant mud discharge part 2 (in the upper left direction in FIG. 1). The specific gravity of the supernatant mud water is about 1.3, the specific gravity of earth and sand is about 2.4 to 2.7, and the specific gravity of FRP is about 1.4.
[0016]
Therefore, since the earth and sand in the sludge water and the FRP are diverged, the earth and sand and the FRP are not entangled with each other and the mud pipe is not clogged, and the shield machine is not stopped from being dug. .
Further, by closing the opening / closing valve 43 and opening the lid portion 42, it is possible to take out the FRP accumulated between the lid portion 42 and the opening / closing valve 43 in a state where the discharge of the waste mud water from the FRP extraction portion 4 is blocked. Therefore, the FRP can be taken out without stopping the shield machine.
[0017]
The present invention is not limited to the embodiment described above. For example, the size of the flow divider main body 1, the structure of the supernatant mud water discharge part 2, the earth and sand discharge part 3, the FRP take-out part 4, the position and quantity of the inspection hole 12, the opening / closing mechanism of the lid part 42, and the type of the opening / closing valve 43 The design can be changed within a range not departing from the gist of the invention.
[0018]
【The invention's effect】
According to the first aspect of the present invention, since the earth and sand in the waste mud water are diverted, the earth and sand and the FRP are not entangled and clog the mud pipe as in the prior art, and the shield machine is advanced. No longer stop.
[0019]
According to invention of Claim 2, FRP accumulated between the cover part and the valve | bulb can be taken out in the state which interrupted | released from the FRP taking-out part. Therefore, the FRP can be taken out without stopping the shield machine.
[Brief description of the drawings]
FIG. 1 is a front view for explaining a shunt according to an embodiment of the present invention.
FIG. 2 is a front view for explaining a shunt in the prior art.
[Explanation of symbols]
2 Supernatant mud discharge part 3 Sediment discharge part 4 FRP take-out part 10 Current divider 42 Lid part 43 Open / close valve

Claims (2)

A shunt body that takes in the mud discharged from the mud pipe connected to the shield machine,
Connected to a drainage pipe connected to a shield machine, provided on the inner bottom surface of the flow divider body, an inflow pipe for taking the wastewater into the flow divider body,
A supernatant mud drainage unit that is connected to the flow divider body and drains the supernatant mud water taken into the flow distributor body;
A sediment discharge unit connected to the flow distributor main body below the supernatant mud water discharge unit, and discharges the sediment in the waste mud water taken into the flow distributor main body,
A waste water separator with
The flow divider main body is provided with an FRP take-out portion for taking out FRP in the waste mud water taken into the flow divider main body at a position lower than the supernatant mud water discharge portion and higher than the earth and sand discharge portion. A wastewater diverter characterized by that. In the waste water separator of claim 1,
The FRP take-out part is provided with a lid that can be opened and closed at the tip part,
A diverter for wastewater drainage, wherein an open / close valve is provided in the interior spaced apart from the lid.

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