JP2000061417A - Cleaning device for existing pipe line - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cleaning device for an existing pipe line with which the inside of the pipe is cleaned in a short time and with simple equipment. SOLUTION: This cleaning device 10 removes foreign matters such as rust sticking to the inside surface of the existing pipe line 1. In such a case, the cleaning device 10 is constituted of a turbine rotating part 11, which is provided with moving blades rotated by an air flow in the pipe generated by differential pressure in the pipe and a cleaning fixture 20, which is driven with the driving power obtd. by the rotational force of the turbine rotating part 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for an existing pipeline, and more particularly to a cleaning device for removing foreign matter in the pipeline.

[0002]

2. Description of the Related Art In addition to gas pipes and water pipes, pipelines buried in the ground include communication pipelines for inserting communication cables and power transmission cables and power pipelines. When these pipes are installed for a long period of time, rust adheres to the inner surfaces of the pipes due to deterioration over time, or foreign substances such as dust accumulate in the pipes. When the cable is inserted through the communication conduit as described above, the rust or foreign matter impedes the cable insertability, and in the worst case, there is a possibility that the cable cannot be inserted while the cable is being inserted. Therefore, when the cable is inserted into the old existing pipeline, it is necessary to clean the inside of the pipeline to remove rust and foreign matter generated in the pipeline as a work in the previous step.

One of the devices for cleaning the inside of the pipe is, for example, a device using a gear hammer. This cleaning device uses a gear hammer having a rotor rotated by an air motor and a plurality of pinions provided in the circumferential direction of the rotor, and the centrifugal force generated when the rotor is rotated hits the pinion against the inner surface of the pipe line. It can be constructed by knocking off the rust on the inside of the road.

[0004]

However, in the above cleaning device, not only a large-scale pump device for driving the air motor is required, but also an air hose for supplying air to the air motor must be inserted into the pipe. I won't. Therefore, there is a problem that the device becomes large-scale and the installation work of the device becomes complicated.

The work procedure for rehabilitation is as follows: the first step is a cleaning step for removing rust and rust bumps using a gear hammer, and the second step is high-pressure water such as water jet for rust inside the pipe. The washing step for removing the powder and the drying step for drying the water in the tube as the third step must be performed. Therefore, there is a problem that the work takes a long time and the equipment used for each process becomes large. In such a cleaning process, it is necessary to select the type of gear hammer or the like according to the change in the inner diameter of the pipeline, which also makes the preparation of the equipment large.

An object of the present invention is to provide a cleaning device for an existing pipeline which can clean the inside of the pipe in a short time and with simple equipment in view of the above problems in the conventional cleaning.

[0007]

In order to achieve this object, the invention according to claim 1 is an apparatus for cleaning an existing pipeline for removing foreign matters in the existing pipeline, wherein the cleaning device uses a differential pressure in the tube. It is characterized in that it is composed of a turbine rotating part having a moving blade that is rotated by a generated air flow in the pipe, and a cleaning tool that is driven by obtaining power from the rotating force of the turbine rotating part.

According to a second aspect of the present invention, the turbine rotating portion has a plurality of moving blades and stationary blades, and the stationary blades are arranged in a stationary state between the moving blades and rotate. It is characterized in that it is used as a rectifying part of the air flow with respect to.

According to a third aspect of the present invention, the moving blade has a plurality of blades fixed along a circumferential direction of a rotating shaft of the turbine rotating portion, and the stationary blade can accommodate the moving blade. It is characterized in that it has a plurality of blades that are fixed to an outer cylinder and are kept stationary regardless of the rotation of the rotary shaft.

[0010]

According to the first aspect of the present invention, the cleaning tool can be operated by rotationally driving the turbine rotating part of the cleaning device by the air flow in the pipe. Therefore, equipment such as a drive source of the turbine driving part and an air supply pipe are installed. This eliminates the need for large-scale equipment and work complexity.

According to the second and third aspects of the present invention, the plurality of moving blades and the stationary blades provided in the turbine rotating portion are alternately arranged so that the flow direction of the in-pipe air flow is rectified by the stationary blades. Since it can be efficiently applied to the surface, the cleaning efficiency of the cleaning tool can be maintained without reducing the rotation efficiency of the moving blade and causing the reduction of the rotational driving force in the turbine rotating part.

[0012]

The details of the present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a schematic view for explaining a cleaning method in which a cleaning device according to an embodiment of the present invention is used, and FIG. 2 is a side view for explaining a cleaning device according to an embodiment of the present invention. Referring to FIG. 1, a cleaning method using a cleaning apparatus according to an embodiment of the present invention provides manholes 2 and 3 for excavating the ground at both ends in an extension direction of a pipeline 1 to be cleaned, and opens both ends of the pipeline. Exposing inside the manholes 2 and 3 is carried out as a preparation for cleaning. It is also possible to use an existing manhole 2 as well as a manhole 3 to be described later, and to target the pipe line 1 located between the manholes for cleaning. A winch 4 which is a traction drive source is installed on the ground of one manhole 2 where one end opening in the extension direction of the pipeline 1 is located, and one end of a traction member 5 such as a wire is paid out from the winch 4. .

A suction device 7 is connected to the ground of the other manhole 3 where the other end opening in the extension direction of the conduit 1 is located, via a duct 6 communicating with the other end opening in the extension direction of the conduit 1. The suction device 7 is used to generate an in-pipe airflow when the cleaning device 10 described below is pulled.
That is, since the cleaning device 10 moves by being pulled to the left side in FIG. 1, if a negative pressure is set on the right side of the cleaning device 10 as a boundary, an in-pipe airflow is generated toward the downstream side in the pulling direction of the cleaning device 10. It Therefore, the suction device 7 can generate a differential pressure inside the pipe that promotes the drying of the water contained in the pipe and obtains an air flow that does not reduce the efficiency of knocking off the rust adhering to the inner surface of the pipe by the cleaning device 10. It is designed to be driven by setting the pressure.

As shown in FIG. 2, the cleaning device 10 has a turbine rotating part 11 connected to the upstream side in the direction of pulling (arrow direction in the drawing) and a wire brush 20 connected to the downstream side as a cleaning tool. . The details of each unit will be described below. The turbine rotating unit 11 includes a rotating support body 14 made of a cylindrical member for supporting the rotating shaft 12. The rotary support 14 includes a spoke-shaped end plate 14A having a plurality of openings (not shown) formed along the circumferential direction,
Both ends in the axial direction are supported by 14A ′, and one end plate, that is, the end plate 14A located on the upstream side in the pulling direction shown by an arrow in FIG. 2, has an end of the pulling member 5 (see FIG. 1). A hook 15 for fastening the portion is fastened.

On the rotary shaft 12 in the rotary support 14, a plurality of stages, in the present embodiment, three stages of moving blades 16 are fixed at predetermined intervals along the axial direction. The moving blade 16 has a plurality of rotating blades along the circumferential direction, and is fixed to the rotating shaft 12 while being inclined at an angle at which the rotating blades can generate a rotating force when receiving an air flow in the tube. The rotary shaft 12 is rotatably supported by bearings 17 and 17 ′ provided on the end plates 14A and 14A ′ of the rotary support 14, and one of them, that is, the end plate located on the opposite side to the hook 15. 14
A wire brush 20 described later is attached to the shaft end portion 12A extended from A '.

A stationary blade 18 is arranged between the moving blades 16 fixed to the rotary shaft 12. The stationary blade 18 has the rotating shaft 1
The straightening plate fixed by the rivet 18A to the inner surface of the outer cylinder 14A of the rotary support 14 which is not affected by the rotation of the second support member 2 is used to transfer the air in the pipe that has flown by hitting the rotary blade surface of the moving blade 16 of the previous stage to the next stage. The inclination angle and blade area of the rotary blade are set so as to efficiently contact the rotary blade surface of the moving blade 16. The moving blades 16 and the stationary blades 18 are alternately arranged along the flow direction of the in-pipe airflow, and the deceleration and pressure drop of the airflow are prevented up to the moving blade 16 at the final stage. As a result, the rotor blades 16 can receive the airflow under the same conditions as the rotor blades located in the first stage, regardless of the number of stages arranged, so that the rotation is prevented from decreasing.

On the outer peripheral surfaces of both ends of the rotary support 14 in the axial direction, centering members 19 made of elastic members capable of contacting the inner peripheral surface of the conduit 1 are provided. The center of the peripheral surface and the center of the cleaning device 10, that is, the axial center position of the rotary shaft 12 are made to coincide with each other. By aligning the alignment positions, the cleaning device 10 does not interfere with the inner wall surface of the pipe when the cleaning device 10 moves in the pipe passage 1.

On the other hand, the wire brush 20 is shown in FIGS.
As shown in the front view of FIG. 4, four frames 21 are extended from the rotary shaft 12 toward the outer peripheral direction, and a cylindrical substrate 22 is fixed to the frames 21. Brushes 23 are provided on the circumference of the substrate 22 at equal intervals. By configuring the wire brush 20 in this way, the in-tube air flow can flow between the substrate 22 and between the brushes 23, and the air flow can flow without being blocked by the wire brush 20.

Since this embodiment has the above configuration,
When cleaning the pipeline 1 using the cleaning device 10, the following preparations are performed. That is, the pulling member 5 hooked on the hook 15 of the cleaning device 10 is passed from the manhole 3 side toward the manhole 2 side, and the pulling member 5 can be wound by the winch 4. A duct 6 connected to a suction device 7 is connected to the other end opening of the pipe line 1 in the extension direction, and the inside of the pipe line 1 is made negative pressure by the suction device 7. In this case, the suction device 7
It is driven in consideration of the pressure at which a pipe air flow capable of drying the water in the pipe 1 is obtained.

When the cleaning device 10 is pulled by the winch 4 through the pulling member 5 in accordance with the generation of the in-pipe air flow by the suction device 7, the in-pipe air flow corresponding to the pressure difference generated in the pipe line 1 is generated. Among the moving blades of the turbine rotating unit 11, the moving blade 16 at the preceding stage rotates. When the rotor blade 16 in the preceding stage starts to rotate, the rotating shaft 12 fixed thereto also interlocks, so that the wire brush 20 attached to the rotating shaft 12 also interlocks. When the wire brush 20 rotates, the brush 23 removes rust and dust generated on the inner wall surface of the conduit 1 and is easily removed from the inside of the conduit 1 by the air flow in the conduit generated by the suction device 7. .

On the other hand, the in-pipe air exhausted from the moving blades 16 located at the preceding stage in the turbine rotating section 11 is converted into the stationary blades 18.
Is again rectified and discharged toward the moving blade 16 of the next stage, so that the moving blade 16 of the next stage has the same condition as that of the moving blade 16 of the previous stage, that is, the same as the case where the airflow in the pipe is first applied. Rotational force can be generated without turbulence of the air flow in the pipe or pressure loss. As a result, the reduction in rotation of the rotating shaft 12 is suppressed, and the rotational force of the wire brush 20 is not impaired.

[0022]

As described above, according to the first aspect of the present invention, the cleaning tool is rotated by rotationally driving the turbine rotating part of the cleaning device by the air flow in the pipe generated when the pipe is pulled and moved. Because it can be activated
It is not necessary to use equipment such as a drive source of the turbine drive unit or an air supply pipe, and thereby large-scale equipment and complexity of work can be eliminated.

According to the second and third aspects of the present invention, by alternately arranging a plurality of moving blades and stationary blades provided in the turbine rotating portion, the moving direction of the air flow in the pipe is rectified by the stationary blades. Since it can be efficiently applied to the blade surface, it is possible to prevent the rotation efficiency of the moving blade from decreasing and maintain the cleaning efficiency of the cleaning tool without reducing the rotation driving force in the turbine rotating part.

[Brief description of drawings]

FIG. 1 is a schematic diagram for explaining a cleaning method using a cleaning device according to an embodiment of the present invention.

FIG. 2 is a sectional view for explaining a schematic configuration of a cleaning device according to an embodiment of the present invention.

FIG. 3 is a front view of a wire brush used in the cleaning device shown in FIG.

[Explanation of symbols]

1 pipeline 4 winches 5 Towing member 6 ducts 7 Suction device 10 Cleaning device 11 Turbine rotating part 12 rotation axes 12A shaft end 14 Rotating support 15 hooks 16 moving blades 18 static wings 20 Wire brush that is a cleaning tool 21 frames 22 Substrate 23 brushes

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kazutoshi Hidaka             3-19-3 Nishi-Shinjuku, Shinjuku-ku, Tokyo Japan             Telegraph and Telephone Corporation (72) Inventor Yasushi Oda             3-19-3 Nishi-Shinjuku, Shinjuku-ku, Tokyo Japan             Telegraph and Telephone Corporation (72) Inventor Masashi Miyatake             3-18-10 Moto-Asakusa, Taito-ku, Tokyo Aire             Ku Giken Co., Ltd. (72) Inventor Nobukatsu Ike             3-18 Daikan, Yamato-shi, Kanagawa Stock             Company Hakko Technology Development Center (72) Inventor Hiroaki Kaneko             3-18 Daikan, Yamato-shi, Kanagawa Stock             Company Hakko Technology Development Center (72) Inventor Yuu Yuki             3-18 Daikan, Yamato-shi, Kanagawa Stock             Company Hakko Technology Development Center F term (reference) 3B116 AA13 AB51 BA02 BA16 BA33

Claims (3)

[Claims] 1. A cleaning device for an existing pipeline for removing foreign matters in the existing pipeline, wherein the cleaning device includes a turbine rotating part having a rotor blade rotated by an air flow in the pipe generated by a differential pressure in the pipe, and the turbine. A cleaning device for an existing pipeline, comprising: a cleaning tool that is driven by the power of the rotating portion. 2. The turbine rotating part has a plurality of moving blades and stationary blades, and the stationary blades are arranged in an immovable state between the moving blades, and an air flow rectifying portion for the rotating moving blades. The cleaning device according to claim 1, wherein: 3. The moving blade has a plurality of blades fixed along a circumferential direction of a rotating shaft of the turbine rotating portion, and the stationary blade is fixed to an outer cylinder capable of accommodating the moving blade. 3. The cleaning device according to claim 2, further comprising a plurality of blades that are kept stationary regardless of the rotation of the rotary shaft.