JP2004298794A - Cleaning method in piping, and scaling apparatus for sedimented setting substance in pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cleaning method easily cleaning pipes with sedimented setting substance fixed on inner walls thereof at site, and a cutting apparatus for the sedimented setting substance inside the pipe used in cleaning. <P>SOLUTION: This cutting apparatus 30 has a vacuum pump 20 attached to a pipe Z at the rear end part of a drain pipe 10 to be cleaned, and is equipped with a cylinder 31 provided with multiple air vent holes 31p at a front side, a piston 32 slidably disposed inside the cylinder 31, a scaling member 33 disposed at the front side of the piston 32, having multiple blade parts 33z at the outer periphery thereof, with tip ends thereof abutting on the inner wall of the drain pipe 10, and a rubber packing 34 attached to the rear side of the cylinder 31. In this cleaning method, the cutting apparatus 30 is inserted into the drain pipe 10, compressed air is sent from a pipe A into the drain pipe 10 by a compressor 40 to slidably move the cutting apparatus 30 to cut off the sedimented setting substance in the pipe, cut chips are sucked by the vacuum pump 20 and collected in a collection tank 50 interposed at the rear stage of a pipe F. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a method for removing a sediment hardened material settled and hardened in a pipe such as a drain pipe to clean the inside of the pipe, and to a device for removing a hardened material in a pipe used at the time of cleaning.
[0002]
[Prior art]
Conventionally, when constructing a shield method, a tunnel is constructed by excavating a face with a cutter attached to the front of the shield machine. Then, the drainage generated at that time is sucked and drained by a vacuum pump through a drain pipe. At this time, since the mortar component sedimentation-hardened mass (settling hardened material) adheres in the drainage pipe, if used for a long time, the drainage pipe may be closed and troubles may occur. Replacement processing had been implemented. Further, even if the drain pipe is not closed, the drainage efficiency is reduced, and the overall work efficiency is reduced. Therefore, the drainage pipe to which the sedimentation hardened material is fixed is replaced not only in the case of trouble but also periodically with a new drainage pipe.
[0003]
[Problems to be solved by the invention]
By the way, the drainage pipe is usually returned to a plumbing company. At that time, the drainage pipe to which the sedimentation-hardened material has adhered is transported to a separately provided cleaning facility, washed and cleaned, and then delivered. I have to. For this reason, piping cleaning costs have been incurred, and construction costs have been increased.
Also, if the drainage pipe can be cleaned at the site, the drainage pipe can be used efficiently and there is no cost for pipe cleaning. Had not been.
[0004]
The present invention has been made in view of the conventional problems, and a method that can easily clean a pipe having a sedimentation hardened substance adhered to an inner wall on site, and a method of setting a sedimentation hardened substance in a pipe used at the time of cleaning. It is intended to provide a cutting device.
[0005]
[Means for Solving the Problems]
The invention according to claim 1 of the present invention is a method for cleaning a pipe in which a sedimentation hardened substance is fixed to an inner wall, wherein a suction device is attached to one end of the pipe to be cleaned and the other end of the pipe is A cutting device having a plurality of wings protruding toward the inner wall side of the pipe is arranged in the pipe on the side, and compressed air is sent from the pipe on the other end side into the pipe to slide the cutting apparatus. The sedimentation hardened material in the pipes is shaved and broken, and the shavings are sucked by the suction device and discharged out of the pipes. This makes it possible to easily clean the inside of the pipe to which the sedimentation hardened material has adhered on site.
[0006]
According to a second aspect of the present invention, in the method for cleaning the inside of a pipe according to the first aspect, a collection tank is inserted at a position separated from a pipe on the other end side of the pipe by a predetermined distance, and the sucked shaving is formed. The waste is collected from the middle of the pipe. Thereby, since the shavings can be collected without being sucked up to the end of the pipe, the shavings can be efficiently collected.
According to a third aspect of the present invention, in the method for cleaning the inside of a pipe according to the second aspect, the length of the recovery tank is set to be the same as the length of a pipe constituting the pipe. Thus, the collection tank can be inserted into the pipe without using a connection adjusting member such as a short pipe.
According to a fourth aspect of the present invention, in the method for cleaning the inside of a pipe according to the second or third aspect, the collection tank can be interrupted when the collection tank becomes almost full during cleaning. An on-off valve for opening and closing the passage of the pipe is provided on the side of the cutting device.
According to a fifth aspect of the present invention, in the method for cleaning the inside of a pipe according to any one of the second to fourth aspects, when the cleaning of the pipe to the collection tank is completed, the cutting device is housed in the collection tank. As described above, the collection tank is provided with an air discharge valve for discharging the compressed air to the atmosphere.
[0007]
An invention according to claim 6 is an apparatus for cutting a settled hardened material in a pipe for shaving a settled hardened substance in a pipe, comprising a cylindrical body and a piston sliding in the cylindrical body. And a shaving member disposed on the distal end side of the piston and protruding from an opening of the cylindrical body and having a plurality of wings on an outer peripheral portion, and the shaving member of the cylindrical body are opposite to each other. And a packing provided on the side, which comes into contact with the inner wall of the pipe to be cleaned.
According to a seventh aspect of the present invention, in the apparatus for cutting a sedimentation hardened product in a pipe according to the sixth aspect, the packing is made of an elastic member such as rubber or resin.
According to an eighth aspect of the present invention, in the apparatus for cutting a sedimentation-hardened product in a pipe according to the sixth or seventh aspect, an air communicating with a hollow portion of the cylindrical body is provided at a tip side of the cylindrical body. A hole is provided.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a view showing a method of cleaning the inside of a pipe according to the present embodiment. FIG. 2 is an example of a configuration of an apparatus 30 for cutting and setting a hardened product in a pipe according to the present invention (hereinafter, referred to as a chipping apparatus). FIG. In each of the drawings, reference numeral 10 denotes a drain pipe connecting pipes A to Z, and reference numeral 20 denotes a drain pipe connected to a pipe Z located at one end of the drain pipe 10 via a connection suction hose 21. A vacuum pump 30 for sucking the inside of the drain pipe 10 is disposed in the pipe A at the other end of the drain pipe 10, and sedimentation hardening in the pipe that scrapes and breaks down the sediment hardened substance fixed on the inner wall side of the drain pipe 10. A cutting device (hereinafter referred to as a cutting device), a compressor 40 is connected to the pipe A and sends compressed air into the drain pipe 10, and a pipe 50 is connected to the pipe F in the middle of the drain pipe 10. H is a collection tank for collecting shavings that are cut by the shaving device 30 and broken by the vacuum pump 20 and sucked in the pipe Z direction.
Hereinafter, for convenience, the pipe A side is referred to as a front side of the drain pipe 10, and the pipe Z side is referred to as a rear side of the drain pipe 10. Further, since the cutting device 30 moves in the direction from the front pipe A to the rear pipe Z, the pipe Z side is called the front side of the cutting apparatus 30 and the pipe A side is called the rear side.
[0009]
As shown in FIGS. 2A and 2B, the cutting device 30 has a cylinder 31 provided with a plurality of air vent holes 31p on the front side, and is slidably disposed in the cylinder 31. A piston 32, a shaving member 33 disposed forward of the piston 32, protruding forward from an opening on the front side of the cylinder 31, and shaving the sedimentation hardened material in the exhaust pipe 10; A rubber packing 34 attached to the rear side of the base 31 and having its tip abutting on the inner wall of the drain pipe 10 is provided.
The cutting member 33 has a rod-shaped arm portion 33a attached to the front side of the piston 32 and an outer peripheral portion attached to the arm portion 33a via a block-shaped connecting member 33b. And a shaving portion 33c having a plurality of wings 33z, the tip of which contacts the inner wall of the drain pipe 10. 2 (a) and 2 (b), for the sake of simplicity, the cutting members 33 have a configuration in which four wing portions 33z orthogonal to each other are arranged in three stages. The shape, the number, the angle formed by each wing portion 33z, and the like are not limited to these, and are appropriately determined by the inner diameter of the drain pipe 10, the type and amount of the sedimentation hardened material, and the like. At this time, in the case of a configuration in which four blades are arranged in three stages, for example, the angle formed by the wing portions 33z in each stage is desirably shifted from each other, for example, the angle is 30 °.
The rubber packing 34 is an umbrella-shaped member attached to an outer peripheral side of a nut 35 having a through hole 35 s communicating with the hollow portion 31 s of the cylinder 31. The threaded portion 35 m of the nut 35 is connected to the rear side of the cylinder 31. The rubber packing 34 is attached to the cylinder 31 by screwing into a screw portion 31m provided at the end of the cylinder 31. At this time, it is desirable that the outer diameter of the rubber packing 34 be slightly larger than the inner diameter of the drain pipe 10 in consideration of deformation due to compressed air described later.
[0010]
The collection tank 50 is provided with an introduction pipe 51 connected to the pipe F at the preceding stage of the insertion point, and a stop valve provided in a passage of the introduction pipe 51 for opening and closing the passage of the drain pipe 10. 51V, an air discharge valve 53V that is opened by the pressure when compressed air is introduced into the container 52 of the collection tank 50, and a collection unit 54 that stores the shavings that have reached the container 52. In this example, the total length L of the recovery tank 50 including the introduction pipe 51 is set to be the same as the length L of the pipes A to Z constituting the drain pipe 10. Therefore, for example, when cleaning the pipes A to F of the drainage pipe 10, the pipe G connected to the subsequent stage of the pipe F is removed, and the collection tank 50 is replaced with the pipe G instead of the pipe G. By interposing between the pipe F and the pipe H at the subsequent stage of the pipe G, the collection tank 50 can be inserted at an arbitrary position of the drain pipe 10 without using a connection adjusting member such as a short pipe. Can be.
At this time, it is preferable that the distance between the input position of the cutting device 30 and the collection tank 50, that is, the length of the pipe to be cleaned is 100 to 200 m.
[0011]
Next, as shown in FIG. 3, for a method of cleaning the drainage pipe 10 for discharging muddy water containing earth and sand excavated by the shield machine 70 in the pit 80 at the site, see FIGS. Will be explained.
First, the drainage hose 71 attached to a drainage port (not shown) of the shield machine 70 is removed from the pipe A at the forefront of the drainage pipe 10, and the cutting device 30 is installed in the pipe A. Next, a connection cover 41 is attached to the opening of the pipe A, and a high-pressure hose 42 from the compressor 40 is connected to the air introduction pipe 41a of the connection cover 41. In parallel with this operation, the pipe G connected to the latter stage of the tube to be cleaned (here, the F tube) is removed, and the tube is collected instead of the tube G. The tank 50 is inserted between the pipe F and the pipe H at the subsequent stage of the pipe G. Thereby, the connection operation for cleaning is completed. As described above, since the length of the recovery tank 50 is the same as the length of the removed pipe G, the pipe at a later stage than the pipe H and the drain pipe 10 installed in the shaft 81 are installed. The vacuum pump 20 for sucking muddy water and the connection suction hose 21 for connecting the vacuum pump 20 and the last pipe Z of the drain pipe 10 may be left as they are.
[0012]
When the connection operation is completed, the vacuum pump 20 is operated to suck the inside of the drain pipe 10 from the last pipe Z direction, and the valve 40V of the compressor 40 is opened to open the drain pipe 10 from the foremost pipe A. Inside, 5.5-7.0 kg / mm ² of compressed air is introduced.
The cutting device 30 is pushed forward (in the direction of the pipe B) by the introduced compressed air, as shown in FIG. At the same time, the compressed air is introduced into the hollow portion 31s of the cylinder 31 through the through hole 35s provided in the nut 35 and pushes the piston 32 forward, so that the cutting member 33 is moved from the opening of the cylinder 31 through the opening. It is further extruded in the direction of the pipe B, and the wings 33z of the cutting member 33 violently collide with the lump of the sedimentation hardened material 10Z fixed to the inner wall of the pipe A. As a result, the sedimentation hardened material 10Z is shaved and broken, and a large number of fine shavings 10z are generated. The shavings 10z are sucked in the pipe Z direction by the negative pressure generated in the exhaust pipe 10 by the suction of the vacuum pump 20.
When the sedimentation hardened material 10Z is strongly fixed, as shown in FIG. 4B, the cutting member 33 is pushed back and the pressure of the air on the front side of the piston 32 is increased. In this example, since the air on the front side is discharged to the outside of the cylinder 31 from the plurality of air vent holes 31p provided in the cylinder 31, the pressure of the piston 32 on the cutting member 33 side sharply decreases, As shown in FIG. 4C, the shaving member 33 is again pushed out from the opening of the cylinder 31 in the direction of the pipe B by the pressure of the compressed air, and collides with the lump of the sedimentation hardened material 10Z.
As described above, the sedimentation hardened material 10Z collides with the wings 33z of the cutting member 33 one after another due to the action of the air hammer by the cutting member 33 accompanying the sliding of the cutting device 30 in the direction of the pipe B. Then, it is shaved and turned into shavings 10z, which are sucked in the pipe Z direction (toward the collection tank 50).
Further, in this example, since the packing of the cutting device 30 is formed of the rubber packing 34 having elasticity, the introduction side and the suction side of the compressed air can be reliably separated. That is, by introducing compressed air, the rubber packing 34 is deformed so as to be pressed against the inner wall side of the drain pipe 10 as shown in FIGS. 4 (a) to 4 (c). Does not leak to the front side of the vehicle. Therefore, the cutting device 30 can be slid in the direction of the pipe B efficiently.
[0013]
The shavings 10z sucked in the pipe Z direction by the vacuum pump 20 are captured by the collection tank 50 and accumulated in the collection unit 54 on the way. In addition, the said shaving apparatus 30 is collect | recovered in the collection | recovery tank 50, after moving from the pipe | tube A to the pipe | tube F by the said compressed air.
When the cleaning of the pipes A to F of the drainage pipe 10 is completed in this way, next, the collection tank 50 and the pipe F are removed, the removed pipe G is attached, and the pipe G is cut. The connection device 41 is attached to the pipe G, and the high pressure hose 42 from the compressor 40 is connected. In addition, a tube at the last stage of the tube G to be cleaned next to the tube to be cleaned next (for example, the tube M) is removed, and the collection tank 50 is inserted therethrough. As in the case of the pipes A to F, the pipes G to M are cleaned. By repeating the above operation, all the drain pipes 10 (pipe A to pipe Z) can be cleaned on site.
[0014]
By the way, when the amount of the sedimentation hardened material 10Z is small, or when the fixing strength is low, the cutting device 30 moves backward by a force of the compressed air to a position higher than the position of the pipe H at the subsequent stage, and the collecting device 50 Since there is a possibility that the compressed air may not be collected, in this example, an air release valve 53V that is opened by the pressure when the compressed air is introduced into the container 52 of the collection tank 50 is provided, and the compressed air is stored in the container 52 of the collection tank 50. To be discharged from The air release valve 53V also has a function as a safety valve that instantaneously discharges the compressed air accumulated behind the cutting device 30 to the atmosphere when the cutting device 30 reaches the collection tank 50. . At this time, it is preferable to control the valve 40V of the compressor 40 to be closed in conjunction with the operation of the air release valve 53V.
When the sedimentation hardened material 10Z in the drain pipe 10 is large, the collection unit 54 may be full before the cutting device 30 reaches the pipe F, but in this example, the collection tank 50 is used. Since the stop valve 51V for opening and closing the passage of the drain pipe 10 is provided, when the cutting waste 10z accumulated in the collection unit 54 reaches a predetermined amount, the stop valve 51V is closed and the collection is performed. After the replacement of the unit 54, the stop valve 51V is opened and the shavings 10z can be collected again. Thereby, it is possible to sufficiently cope with the case where the settled hardened material 10 </ b> Z accumulated in the drain pipe 10 is large.
[0015]
As described above, in the present embodiment, the vacuum pump 20 is attached to the pipe Z at the rear end of the drain pipe 10 to be cleaned, and the cylinder 31 having the plurality of air vent holes 31p provided on the front side; The piston 32 is slidably disposed in the inside, a rod-shaped arm portion 33a attached to the front side of the piston 32, and is attached to the arm portion 33a via a block-shaped connecting member 33b. A cutting member 33 comprising a cutting portion 33c having a plurality of wings 33z having a tip abutting on the inner wall of the drain pipe 10, and a tip mounted on the rear side of the cylinder 31 and having a tip attached to the inner wall of the drain pipe 10. The cutting device 30 provided with the rubber packing 34 that contacts the pipe A is put into the pipe A at the forefront of the pipes A to F to be cleaned of the drain pipe 10, and the pipe A is compressed by the compressor 40. Then, compressed air is sent into the drainage pipe 10 to slide the shaving device 30 to cut and settle the sedimentation hardened material in the pipe, and the shavings are sucked by the vacuum pump 20, and this is sucked by the vacuum pump 20. Since the wastewater is collected in the collection tank 50 interposed at the subsequent stage of the pipe F, the drainage pipe 10 to which the sedimentation hardened material has adhered can be easily cleaned. Therefore, the drain pipe 10 can be used efficiently at the site, and the pipe cleaning cost can be significantly reduced. Further, since the shaving device 30 can be reused, further cost reduction can be realized.
[0016]
In the above-described embodiment, the method of cleaning the drain pipe 10 of the shield machine 70 has been described. However, the present invention is not limited to this, and the present invention can be applied to the removal of fixed matter in various pipes. it can.
Further, in the above example, the drain pipe 10 is cleaned at the site (underground 80), but the drain pipe 10 may be transported to a location different from the site to be cleaned. That is, the cleaning according to the present invention requires less equipment and is easier than conventional cleaning work in a cleaning facility, so that even if transportation costs are incurred, piping cleaning costs can be significantly reduced.
[0017]
【The invention's effect】
As described above, according to the present invention, when cleaning the inside of a pipe in which the sedimentation hardened material is fixed to the inner wall, a suction device is attached to one end of the pipe to be cleaned, and the other end of the pipe is In the pipe, a cutting device having a plurality of wings projecting toward the inner wall side of the pipe is arranged, and compressed air is sent from the pipe on the other end side into the pipe to slide the chipping apparatus. The sedimentation hardened material in the pipe is shaved and broken, and the shavings are sucked by the suction device and discharged to the outside of the pipe. Can be cleaned. Thereby, work efficiency can be improved, and the pipe cleaning cost can be significantly reduced.
In addition, the cutting device is provided with a cylindrical body, a piston that slides in the cylindrical body, and a plurality of outer peripheral parts that are disposed on the distal end side of the piston and protrude from an opening of the cylindrical body. Since it is composed of a shaving member with wings and a packing provided on the opposite side of the tubular body from the shaving member and abutting against the inner wall of the pipe to be cleaned, it can be reused with a simple configuration. It is possible to realize a cutting device capable of performing cutting.
[Brief description of the drawings]
FIG. 1 is a diagram showing a method for cleaning the inside of a pipe according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing an example of a configuration of a device for cutting down sedimentation hardened material in a pipe according to the present embodiment.
FIG. 3 is a diagram illustrating an example in which the present invention is applied to a method of cleaning a drain pipe of a shield machine.
FIG. 4 is a diagram for explaining the operation of the shaving apparatus according to the present embodiment.
FIG. 5 is a diagram showing a cleaning method using the shaving device according to the present embodiment.
[Explanation of symbols]
Reference Signs List 10 drainage pipe, 10Z sedimentation hardened material, 10z shaving waste, 20 vacuum pump, 21 connection suction hose, 30 pipe sedimentation hardened material shaving device, 31 cylinder, 31m screw part, 31p air vent hole, 31s cylinder hollow Part, 32 piston, 33 shaving member, 33a arm part, 33b connecting member, 33c shaving part, 33z wing part, 34 rubber packing, 35 nut, 35m screw part, 35s through hole, 40 compressor, 40V compressor valve, 41 connection lid, 41a air introduction pipe, 42 high pressure hose, 50 collection tank, 51 introduction pipe, 51V stop valve, 52 container, 53V air release valve, 54 collection unit, 70 shield excavator, 71 drainage hose, 80 underground , 81 shafts, AZ tubes.

Claims (8)

A suction device is attached to one end of the pipe to be cleaned, and a cutting device having a plurality of wings protruding toward the inner wall side of the pipe is arranged in a pipe at the other end of the pipe. Compressed air is sent from the pipe into the pipe and the chipping device is slid to cut the sedimentation hardened material in the pipe, and the shavings are sucked by the suction device and discharged out of the pipe. A method for cleaning the inside of a pipe, characterized in that: The method for cleaning the inside of a pipe according to claim 1, wherein a collection tank is inserted at a position separated by a predetermined distance from a pipe on the other end side of the pipe, and the sucked shavings are collected. . The method for cleaning the inside of a pipe according to claim 2, wherein the length of the collection tank is the same as the length of a pipe constituting the pipe. The method for cleaning the inside of a pipe according to claim 2 or 3, wherein an on-off valve for opening and closing the passage of the pipe is provided on a side of a chipping device of the collection tank. The method according to any one of claims 2 to 4, wherein the collection tank is provided with an air discharge valve for discharging the compressed air to the atmosphere. A cylindrical member, a piston that slides in the cylindrical member, and a shaving member disposed on the distal end side of the piston and protruding from an opening of the cylindrical member and having a plurality of wings on an outer peripheral portion. Shaving the sedimentation hardened product in the pipe, comprising: a packing provided on the outer peripheral side of the cylindrical body opposite to the shaving member, the packing being in contact with an inner wall of the pipe to be cleaned. apparatus. The apparatus for cutting down sedimentation hardened material in a pipe according to claim 6, wherein the packing is made of an elastic member. The apparatus according to claim 6 or 7, wherein an air vent hole communicating with a hollow portion of the cylindrical body is provided at a distal end side of the cylindrical body.

Images