JPH10131278A - Washing method for sewage pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove dirt on a bottom of a crossing pipe and a wall of the pipe in a sewage system by stretching over a wire which connects a spherical body between manholes in the downstream and the upstream and moving the spherical body forcedly by a winch by repeating it from the downstream side to the upstream side. SOLUTION: First, solid filth 4 on a bottom of a manhole in the downstream 15 is discharged by a clamshell 19. Next, a wire 11 which connects a hollow spherical body 7 is stretched over between manhole in the upstream and the downstream 13 and 15 to arrange the spherical body 7 on a bottom 5a of a crossing pipe 5. The spherical body 7 is wound up by winches 17, 18 from a start point A to an end point B. An inside diameter of the crossing pipe 5 is reduced by the spherical body 7, water pressure and flow speed of sewage water 25 are increased, and an eddy current is generated in the vicinity of the spherical body 7 to remove oily filth 27 adhered on a wall of the pipe and solid filth 4 adhered on the pipe bottom 5a. After this work is repeated twice or three times, the spherical body 7 is arranged on an upper wall 5b and is moved forcedly from C point to D point to remove the oily filth 27 on the wall face of the pipe. The solid filth 4 and the oily filth 27 which are removed are discharged by a clamshell 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cleaning a sewer pipe, and more particularly to a method for discharging and removing dirt remaining or adhering to a sewer pipe.

[0002]

2. Description of the Related Art Conventionally, in order to discharge and remove solid waste called sediment called sediment in a sewer pipe, in particular, a transverse pipe that connects and crosses a sewer pipe and a sewer pipe, an operator enters the sewer pipe through a manhole and a scoop. Excavated and scraped solid waste. In addition, the removal and removal of oily dirt called scum attached to the upper wall of the sewer pipe was also performed manually.

[0003]

However, this operation has a risk that harmful gas or the like may be generated, and since the operation is performed in a pipe, there is a problem that not only is there a safety problem but also efficiency is not improved.

SUMMARY OF THE INVENTION [0004] In view of the above background, an object of the present invention is to provide a method for cleaning a sewer pipe which avoids problems in work safety and improves work efficiency.

[0005]

In order to achieve the above object, a method for cleaning a sewer pipe according to the present invention comprises placing a spherical body in a sewer pipe and forcibly moving the spherical body in a direction opposite to the direction of sewage discharge. And discharges and removes dirt remaining or attached to the sewer pipe. At that time, the step of arranging the spherical body at the bottom of the sewer pipe and forcibly moving it a plurality of times, or the step of arranging the spherical body on the upper wall of the sewer pipe and forcibly moving it a plurality of times or A first step of disposing the spherical body at the bottom of the sewer pipe and forcibly moving it a plurality of times, and a second step of disposing the spherical body on the upper wall of the sewer pipe and forcibly moving it a plurality of times after completion of the first step It can be considered that Further, it is conceivable that the spherical body has a sphere, an ellipsoid, or a projection provided on the surface thereof. It is also conceivable that the spherical body is hollow or solid. Further, it is conceivable to work by increasing the diameter of the spherical body from a small diameter to a larger one.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a method for cleaning a drain according to the present invention will be described in more detail with reference to the drawings showing an embodiment. FIG. 1 shows a case of discharging and removing solid waste 4 called sediment deposited on the bottom of a sewer pipe as a transverse pipe 5 connecting and crossing between the sewer pipe 1 and the sewer pipe 3. Solid waste 4
Is often about 10% to several tens% of the tube diameter. The spherical body 7 installed in such a transverse tube 5 is formed into a hollow sphere, and the connecting rods 9, 9
Is provided. The diameter of the spherical body 7 is about half of the diameter of the transverse tube 5 (the diameter of the spherical body 7 is 700 mm and the diameter of the transverse tube 5 is 1400 mm in the illustrated embodiment). The wire rod 9,
9 is connected to the wire 11. The wire 11 is wound between the manhole 13 on the upstream side and the manhole 15 on the downstream side, and is wound up by the winches 17 and 18 toward the manhole 13 on the upstream side. Reference numeral 19 denotes a clamshell for discharging the solid waste 4 scraped into the manhole 15 on the downstream side to the ground, reference numerals 20 and 21 denote blowers provided for the generation of harmful gases, and reference numeral 23 a load of the solid waste 4 discharged to the ground. Dump truck, 25 is sewage, and 27 is oily dirt called scum attached to the upper wall in the transverse pipe 5.

Next, the working procedure and the functions and effects will be described.
First, the solid waste 4 accumulated at the bottom of the manhole 15 on the downstream side, which is the waste discharge side, is discharged and removed by the clamshell 19. Next, the wire 11 is passed from the manhole 13 on the upstream side to the manhole 15 on the downstream side. The spherical body 7 is connected to the wire 11 and arranged on the bottom 5a of the cross tube 5 as shown in FIG. The spherical body 7 is initially at the position of the starting point A, and the direction opposite to the outflow direction (the direction of the arrow P) of the sewage 25 (the direction of the arrow P) by the winches 17 and 18 up to the position of the end point B, that is, from the downstream to the upstream. The spherical body 7 is wound up. Then, the inside diameter of the transverse tube 5 becomes small due to the presence of the spherical body 7. On the other hand, the amount of the sewage 25 flowing in the pipe does not change. Therefore, the water pressure and the flow velocity of the sewage 25 flowing in the pipe become large, and a vortex is generated in the water flow near the spherical body 7. As a result, solid contaminants 4 remaining at the bottom of the transverse pipe 5 near the spherical body 7 are scraped out, and oil called scum attached to the pipe wall in the transverse pipe 5 near the spherical body 7 The dirt 27 is removed and these are discharged to the manhole 15 on the downstream side. This operation is gradually performed from the starting point A to the ending point B while the spherical body 7 is forcibly moved. This is the first step. The first
The process is usually repeated two or three times.

If the amount of oily dirt 27 attached to the tube wall, particularly the upper wall, in the transverse tube 5 cannot be removed by the first step alone, the process proceeds to the first step and then to the second step. That is, as shown in FIG. 2, the spherical body 7 is arranged on the upper wall 5b in the transverse tube 5, and is forcibly moved from the position of the starting point C to the position of the ending point D by the winches 17, 18. Then, the force of the sewage 25 having a large water pressure and flow velocity and the vortex generated near the spherical body 7 act closer to the upper wall 5b, so that the oily dirt 27 attached to the pipe wall surface can be removed. is there. The second step is usually repeated two or three times.

The solid waste 4 and the oily waste 27 discharged and removed in this way are discharged to the ground by the clamshell 19, loaded on the dump truck 23 and transported.

As described above, according to the present embodiment, it is not necessary to put a worker in the transverse pipe 5 to work as in the related art, so that a problem in work safety can be avoided. Further, the work is performed by a machine, that is, the spherical body 7 is forcibly moved in a direction opposite to the outflow direction of the sewage 25, and the solid waste 4 and the oily waste 27 are discharged and removed by the force of the sewage 25 stored in the sewage pipe 1. The work is performed efficiently.

The method for cleaning a sewer pipe according to the present invention is not limited to the above embodiment. For example, in the illustrated embodiment, the drain pipe 1 on the upstream side, the drain pipe 3 on the downstream side, and the cross pipe 5
Although the case where there is a step between the two has been described as an example, the case where there is no step between the two may be used.

When the sewer pipe is not very dirty, the first step may be terminated. Alternatively, there may be a case where only the above-described second step is independently performed.

The shape of the spherical body 7 is arbitrary.
The protrusion may be provided on the surface of a spherical body 7 as shown in FIG.
Note that the projection 8 can be provided on an elliptical body as shown in FIG. In these cases, the generation of the vortex is further increased by the ellipsoid or the projection 8 of the spherical body 7, so that the effect of removing dirt is further improved.

Further, since it is not known what is in the pipe, if the spherical body 7 is a sphere as shown in FIG. 3, it can be easily pulled out when it is held in the pipe during operation.

The spherical body may be hollow or solid. The material is arbitrary. In the case of disposing at the bottom of the pipe in the sewer pipe as in the first step described above, for example, an iron-made pipe is conceivable. And so on.

Further, when the above-mentioned spherical body 7 is used by working from a small one with a small diameter to a large one, the work with the large-sized spherical body 7 becomes possible in accordance with the removal of the dirt adhering to the inside of the pipe. Is further improved.

Further, the moving medium of the spherical body 7 is arbitrary, and a chain or the like can be considered in addition to a wire.

Further, the pipe to be cleaned can be applied not only to a transverse pipe but also to a general sewer pipe.

[0019]

As described above, according to the method of cleaning a sewer pipe according to the present invention, there is an effect of avoiding problems in work safety and improving work efficiency.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a method for cleaning a sewer pipe according to the present invention.

FIG. 2 is a sectional view showing an embodiment of a method for cleaning a sewer pipe according to the present invention.

FIG. 3 is a front view showing an embodiment of a spherical body used in the method of the present invention.

FIG. 4 is a front view showing another embodiment of the spherical body used in the method of the present invention.

FIG. 5 is a front view showing still another embodiment of a spherical body used in the method of the present invention.

[Explanation of symbols]

 Reference Signs List 1 sewage pipe 3 sewage pipe 4 solid waste 5 sewage pipe (crossing pipe) 5a pipe bottom 5b upper wall 7 spherical body 8 protrusion 9 communication rod 11 communication wire 13 upstream manhole 15 downstream manhole 17 winch 18 winch 19 Clamshell 20 blower 21 blower 23 dump truck 25 sewage 27 oily dirt

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[Procedure amendment]

[Submission date] August 27, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

[0008] When the oily dirt 27 attached to the tube wall, particularly the upper wall, in the transverse tube 5 cannot be removed by the first step alone, the process proceeds to the first step and then to the next second step.
That is, as shown in FIG.
b, and is forcibly moved by the winches 17 and 18 from the position of the start point C to the position of the end point D. Then, the force of the sewage 25 having a large water pressure and flow velocity and the vortex generated near the spherical body 7 act closer to the upper wall 5b, so that the oily dirt 27 attached to the pipe wall surface can be removed. is there. The second step is usually repeated two or three times.

Claims (10)

[Claims] A spheroid is inserted into a sewer pipe, and the spheroid is forcibly moved in a direction opposite to an outflow direction of sewage to discharge and remove dirt remaining or adhering to the sewage pipe. How to clean water tubes. 2. A method for cleaning a sewer pipe according to claim 1, further comprising the step of arranging the spherical body at the bottom of the pipe in the sewer pipe and forcibly moving the spherical body a plurality of times. 3. The method for cleaning a sewer pipe according to claim 1, comprising a step of disposing the spherical body on an upper wall in the sewer pipe and forcibly moving the spherical body a plurality of times. 4. A method for cleaning a sewer according to claim 1, wherein the first step comprises disposing the spherical body at a bottom of the sewer pipe and forcibly moving the spherical body a plurality of times; and after the first step, removing the spherical body. A second step of disposing the pipe on the upper wall inside the drain pipe and forcibly moving the pipe a plurality of times. 5. The method for cleaning a sewer pipe according to claim 1, wherein the spherical body is a sphere. 6. The method for cleaning a sewer according to claim 1, wherein the spherical body is an ellipsoid. 7. A method for cleaning a sewer pipe according to claim 5, wherein a projection is provided on a surface of the spherical body. 8. The method for cleaning a sewer according to claim 1, wherein the spherical body is hollow. 9. The method for cleaning a sewer according to claim 1, wherein the spherical body is solid. 10. The method for cleaning a sewer pipe according to claim 2, wherein the spherical body is gradually increased in size from a small diameter to a large diameter. Cleaning method.