JP7403801B2 - How to clean inside the pipe - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act (1) On June 10, 2019, the contents of the method for cleaning inside sewer pipes were released using presentation software at a presentation at the Tokyo Metropolitan Bureau of Sewerage. (2) On July 18, 2019, near 4 Nitta Asahi-cho, Daito City, Osaka Prefecture, a method for cleaning inside sewage pipes was unveiled through an on-site test and demonstration using an actual machine. (3) On July 24, 2019, at 11-1 Iizumi, Odawara City, Kanagawa Prefecture, a method for cleaning inside sewage pipes was unveiled through an on-site test and demonstration using an actual machine. (4) On July 31, 2019, the details of how to clean inside sewage pipes were released using presentation software at a presentation at the Tokyo Metropolitan Bureau of Sewerage. (5) From August 6th to 9th, 2019, Jun Takada and Katsuya Utsumi presented a video showing how to clean inside sewer pipes at the Sewerage Exhibition '19 Yokohama. (6) On 26, 2019, at 2-9 Hongo Minami, Mihara City, Hiroshima Prefecture, a method for cleaning inside sewage pipes was unveiled through an on-site test and demonstration using an actual machine. (7) On October 10, 2019, the contents of the method for cleaning inside sewage pipes were released using presentation software at a presentation at the Tokyo Metropolitan Bureau of Sewerage West Office No. 1. (8) On November 19, 2019, Katsuya Utsumi released the details of the method for cleaning inside sewage pipes using presentation software at the 30th Trenchless Technology Research Presentation. (9) Published in the 30th Trenchless Technology Research Presentation Collection (Japan Trenchless Technology Association) published on November 19, 2019. (10) From December 5th to 7th, 2019, Jun Takada and Katsuya Utsumi will be showing a video of how to clean inside sewage pipes at Eco Products 2019. (11) On February 14, 2020, at a presentation at NSC Engineering Co., Ltd., the details of how to clean inside sewage pipes were released using presentation software. (12) Published on February 17, 2020 at the Yokohama Training Center of Kansei Kogyo Co., Ltd. by showing and explaining the actual machine to Tokyo Metropolitan Bureau of Sewerage Planning and Coordination Department Technology Development Division staff.

The present invention relates to a method for cleaning the inside of a pipe using a cleaning robot, and particularly to a method for cleaning the inside of a large-diameter sewer pipe.

Since sludge and the like accumulate or adhere to flow paths such as sewer pipes and side gutters, it is necessary to clean the inside of the flow paths in order to remove the accumulated sludge and the like. For example, as shown in Patent Document 1, the inside of the flow path is cleaned by spraying high-pressure cleaning water into the flow path to crush accumulated or attached sludge, and then flush the crushed sludge with cleaning water, sewage, etc. This is done by suctioning with a suction wheel.

Japanese Patent Application Publication No. 2014-105520

However, with this method of cleaning the inside of the flow path, if the amount of water such as washing water or sewage sucked in by the suction truck is large, the suction tank of the suction truck will quickly become full with water containing sludge, etc. It ends up. When the suction tank of the suction truck becomes full, cleaning work must be temporarily stopped and the water in the suction tank must be drained before cleaning can be started again, so filling the suction tank early will improve cleaning work efficiency. decrease.

Therefore, an object of the present invention is to provide a method for cleaning the inside of a pipe with excellent cleaning efficiency.

To achieve this object, the pipe cleaning method of the present invention is a pipe cleaning method for cleaning accumulated deposits such as sludge inside a pipe such as a sewage pipe, and includes a cleaning hose, a high-pressure water jetting device, or the like. A pipe cleaning robot that is equipped with a firing device and can travel inside a pipe such as a sewage pipe, a receiver tank device to which the cleaning hose of the pipe cleaning robot is connected, and a receiver tank device that receives discharged material from an outlet of the receiver tank device. A preparatory step or preparatory work for preparing a recovery tank arranged as shown in FIG. , in order to suck in and clean the accumulated deposits in the pipe, which have been crushed by the injection device or firing device of the pipe cleaning robot disposed in the pipe such as a sewage pipe, with the cleaning hose. A cleaning process or cleaning operation in which the water in the pipe is sucked in by the cleaning hose using the suction force of the suction device, and the sucked water is discharged from the cleaning hose to the receiver tank device, and the water accumulated in the receiver tank device is drained into the receiver tank. a recovery step or recovery operation of recovering the water from the discharge port of the device to the recovery tank; the receiver tank device is provided with a pair of receiver tanks; a first cleaning step or cleaning operation in which water is discharged into one of the receiver tanks, and a second cleaning step or cleaning operation in which water sucked in by the cleaning hose is discharged into the other receiver tank, and the recovery step Alternatively, the recovery operation is a first recovery step or recovery in which water accumulated in one of the receiver tanks is recovered from the discharge port of one of the receiver tanks to the recovery tank after the first cleaning step or the cleaning operation is completed. and a second recovery step or recovery operation of recovering water accumulated in the other receiver tank from the outlet of the other receiver tank to the recovery tank after the second cleaning step or cleaning operation is completed. , and the recovery tank is provided with a discharge structure for removing or separating the deposits from the recovered water and discharging it.

The inside pipe cleaning method of the present invention is carried out, for example, to clean the inside of a large-diameter sewer pipe. The pipe cleaning robot cleans the inside of a sewage pipe where sewage flows, for example, at a depth of 10 cm to 50 cm (maximum depth), while moving against the flow of sewage, upstream, or downstream. To go. The pipe cleaning robot uses, for example, a high-pressure cleaning water injection device or a firing device to crush or peel off deposits (deposits or deposits). The pipe cleaning robot has, for example, a television camera, and uses an injection device or a firing device to pulverize deposits detected by the television camera. The pipe cleaning robot can stop and use an injection device or a firing device to pulverize deposits or the like.

In order to suck in and clean accumulated deposits crushed by the injection device or firing device of the pipe cleaning robot with the cleaning hose, for example, the suction force of the suction device is always applied to the receiver tank device, and the cleaning hose is always in a suction state. can be kept in. With this configuration, the amount of water such as sewage transported from the cleaning hose to the receiver tank device increases, but if the receiver tank device is provided with a pair of receiver tanks, for example, water can be transferred from the cleaning hose to one receiver tank. When water is being discharged, water is not being discharged from the other receiver tank (first cleaning process or cleaning work). For example, when a predetermined amount of water accumulates in one receiver tank, water is discharged from the other receiver tank. The state is switched to a state in which no water is discharged, and the other receiver tank, which is in an empty state, for example, is switched to a state in which water is discharged from a cleaning hose (second cleaning process or cleaning operation). For example, when the first cleaning process or cleaning work is completed, water accumulated in one receiver tank during the second cleaning process or cleaning work is collected into a recovery tank (first collection process or collection work). Also, for example, when a predetermined amount of water accumulates in the other receiver tank, the other receiver tank switches to a state in which water is not discharged, and, for example, one receiver tank that is empty switches to a state in which water is discharged from the cleaning hose. Switch (first cleaning process or cleaning work). For example, when the second cleaning process or cleaning work is completed, the water accumulated in the other receiver tank during the first cleaning process or cleaning work is collected into a recovery tank (second collection process or work). In this way, for example, the first cleaning step or cleaning operation and the second cleaning step or cleaning operation are repeated alternately as many times as necessary, but for example throughout the entire cleaning step or operation or during the entire cleaning step or cleaning operation. During the cleaning operation, the suction force of the suction device is constantly acting on the receiver tank device.

Here, if the capacity of the recovery tank is large, it is possible to accommodate the total amount of water to be recovered, but then the installation and transportation of the recovery tank becomes complicated. Therefore, it is preferable to provide a discharge structure for removing or separating deposits from the water collected in the collection tank and discharging it. With this configuration, only the water from which deposits have been removed or separated can be pumped into a sewer pipe, etc., at any time, for example, during the cleaning process or cleaning work, or during and after the cleaning process or cleaning work is completed. Since it can be returned into the pipe, the capacity of the recovery tank can be kept small. Specifically, a partition wall is formed to divide the inside of the recovery tank into a recovery tank and a water tank, and a window (for example, a mesh window) is installed in the partition wall to filter the water collected in the recovery tank and flow it into the water tank. ), and provide drainage means under the outer wall of the water tank. For example, the window is provided above the drainage means.

By using the method for cleaning inside a pipe of the present invention, the inside of a pipe such as a sewer pipe can be efficiently cleaned.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram schematically showing a sewer pipe cleaning system used to carry out a sewer pipe cleaning method according to the present invention. It is a diagram showing a sewer pipe cleaning robot. It is a figure showing a hose winding reel device, a collection tank, and a receiver tank device. It is a perspective view of a recovery tank and a receiver tank device. FIG. 3 is a perspective view of a recovery tank. It is a figure explaining a 1st cleaning process, a 2nd cleaning process, a 1st collection process, and a discharge process. It is a figure explaining the 1st cleaning process, the 2nd collection process, and the discharge process switched from the 2nd cleaning process. It is a figure explaining the completion state of a cleaning process and a discharge process.

First, a sewer pipe cleaning system used to implement the sewer pipe cleaning method according to the present invention will be schematically explained with reference to FIG.

A sewer pipe cleaning system 1 includes a sewer pipe cleaning robot 5 placed inside a sewer pipe 3 to clean the inside of a large-diameter sewer pipe 3 having a pipe diameter of 800 mm or more, and a sewer pipe cleaning robot 5 installed on a road 9 near a manhole 7, for example. In addition, there is a hose take-up reel device 13 that winds up the cleaning hose 11 of the sewer pipe cleaning robot 5, a recovery tank 15 installed on the road 9 near the manhole 7, and a hose that can be placed on the recovery tank 15. A receiver tank device 17 is disposed on the road 9, and a suction vehicle 19 (absorption device) is parked on the road 9.

Next, the sewer pipe cleaning robot 5, the hose take-up reel device 13, the recovery tank 15, and the receiver tank device 17 will be described in detail with reference to FIGS. 2 to 5.

As shown in an enlarged view in FIG. 2, the sewer pipe cleaning robot 5 includes a main body 23 equipped with wheels 21 driven by a motor (not shown), and a high-pressure cleaning water injection device provided at the tip of the main body 23. (nozzle) 25 and a television camera 27, the tip side is arranged below this main body 23, the rear side passes through the manhole 7, and is wound around the hose take-up reel device 13 (see Fig. 3) installed on the road 9. Lifting and lowering of the cleaning hose 11 that has been removed, the suction port member 31 provided at the tip of the cleaning hose 11, and the suction port member 31 provided between the tip of the main body 23 and the suction port member 31. The cleaning hose 11 is self-propelled toward the upstream side within the sewer pipe 3 while being fed out from the hose take-up reel device 13 (see arrow), and is equipped with a cylinder 33 for high-pressure cleaning inside the suction port member 31. Sewage containing sludge, etc. that has been crushed with water is collected and sucked out. Note that sewage 35 flows in the sewage pipe 3 to a depth that reaches, for example, the wheels 21 . Further, a high-pressure hose, a high-pressure vehicle, a power signal cable, and the like that supply high-pressure water to the high-pressure cleaning water injection device 25 are not shown.

As shown in FIG. 3, the hose take-up reel device 13 includes a base 37 installed on the road 9 and a take-up reel 39 rotatably attached to the base 37. The cleaning hose 11 is wound on a reel 39 so that it can be fed out.

As shown in FIGS. 3, 4, and 5, the collection tank 15 is formed in a box shape with an opening on the top surface, and the inside is separated by a partition wall 41 into a collection tank 43 for collecting sewage containing sludge, etc. It is divided into a sewage tank 45 for separately receiving sewage. The partition wall 41 has windows 47 and 49, one on the lower side and one on the upper side, for flowing sewage from the collection tank 43 to the sewage tank 45, and each window 47 and 49 has a removable mesh member 51, 53 is attached, and the windows 47, 49 are configured as mesh windows. A sewage return pipe 55 (drainage means) for draining the sewage in the sewage tank 45 is provided on the lower side of the outer wall of the sewage tank 45, and a sewage return hose 57 connected to this sewage return pipe 55 is connected to the manhole 7. through which it is led to the downstream sewer pipe 5 (see also Figure 1). Note that reference numerals 59 and 59 in FIG. 3 are casters with stoppers for moving the recovery tank 15. Further, reference numeral 58 in FIG. 3 is a drain port for discharging sludge and the like accumulated in the collection tank 43, and is normally closed with a cap 60.

As shown in FIGS. 3 and 4, the receiver tank device 17 includes a pair of receiver tanks 61 and 63, and is supported by being placed on support bars 65 and 67 of the recovery tank 15. For example, one end 71 and the other end 73 of a U-shaped intake pipe 69 are connected to the front upper ends of the pair of receiver tanks 61 and 63, respectively. One-side intake valve accommodating part 75 and the other-side intake valve accommodating part 77 are formed to accommodate one side intake butterfly valve (not shown) and the other side intake butterfly valve (not shown), respectively. A vacuum pipe 79 is connected to the center of the pipe 69, and a suction hose 83 extending from a suction tank (receiver tank of the suction vehicle) 81 (see FIG. 1) of the suction wheel 19 is connected to this vacuum pipe 79. There is. Furthermore, one end 87 and the other end 89 of a U-shaped water suction pipe 85 are connected to the rear upper ends of the pair of receiver tanks 61 and 63, respectively. A one-side water intake valve accommodating part 91 and an other-side water suction valve accommodating part 93 are formed on the sides, respectively, for accommodating a one-side water suction butterfly valve (not shown) and an other-side water suction butterfly valve (not shown). A suction pipe 95 is connected to the center of the water suction pipe 85, and one end of the suction pipe 95 is connected to the shaft of the take-up reel 39 so as to communicate with the rear end of the cleaning hose 11. The other end of the communicated suction hose 97 is connected. Note that, as shown by imaginary lines in FIGS. 1 and 3, the rear end of the cleaning hose 11 is wound around the take-up reel 39 one to three times without using the suction hose 97. The rear end of the hose 11 may be extended toward the receiver tank device 17 and directly connected to the suction pipe 95.

Inside each of the receiver tanks 61 and 63, there is a liquid level sensor 99 on one side and a liquid level sensor 101 on the other side that detect when the water level of the sewage sucked up or sucked into the tank reaches a predetermined height. The lower end openings (discharge ports) 103 and 105 of the respective receiver tanks 61 and 63 are provided with one side hatch (not shown) that opens and closes by driving one side opening/closing cylinder (not shown) and the other side opening/closing cylinder (not shown). It is closed by a hatch on one side (lid) 107 and a hatch on the other side (lid on the other side) 109. Lower end openings 103 and 105 of the receiver tanks 61 and 63 are located above the collection tank 43.

The operating mode of the sewer pipe cleaning system 1 will be explained with reference to FIGS. 6 to 8.

First, the one-side intake butterfly valve accommodated in the one-side intake valve accommodating portion 75 of the intake pipe 69 and the one-side water intake butterfly valve accommodated in the one-side water intake valve accommodating portion 91 of the water intake pipe 85 are opened. , the other side intake butterfly valve accommodated in the other side intake valve accommodating portion 77 of the intake pipe 69 and the other side water intake butterfly valve accommodated in the other side water intake valve accommodating portion 93 of the water intake pipe 85 are closed. , and the hatches 107 and 109 of the pair of receiver tanks 61 and 63 are closed to reduce the pressure in the suction tank 81 of the suction wheel 19. Then, the pressure inside one receiver tank 61 is reduced through the suction hose 83, the vacuum pipe 79, and the suction pipe 69 (see arrow A in FIG. ), and the sewage (or sewage and wash water) in the sewage pipe 3 flows into one receiver tank 61 via the water suction hose 97, the suction pipe 95, and the water suction pipe 85 (see arrow C in a of FIG. 6). (first cleaning process or cleaning work). Note that when the water suction hose 97 is not used, the sewage (or sewage and washing water) in the sewer pipe 3 is sucked up into one receiver tank 61 via the cleaning hose 11, the suction pipe 95, and the water suction pipe 85. . Therefore, the interior of the sewer pipe 3 can be cleaned by pulverizing the deposits such as sludge and sucking up the sewage containing the crushed deposits.

When the sewage sucked into one receiver tank 61 reaches a predetermined amount and the liquid level of the sewage is detected by the one side liquid level sensor 99, a detection signal is output from the one side liquid level sensor 99, and the intake pipe 69 The one-side intake butterfly valve accommodated in the one-side intake valve accommodating portion 75 and the one-side water intake butterfly valve accommodated in the one-side water intake valve accommodating portion 91 of the water suction pipe 85 are automatically switched to the closed state; The other side intake butterfly valve accommodated in the other side intake valve accommodating portion 77 of the intake pipe 69 and the other side water intake butterfly valve accommodated in the other side water intake valve accommodating portion 89 of the water intake pipe 85 are automatically opened. It switches to Then, the pressure inside the other receiver tank 63 is reduced through the suction hose 83, the vacuum pipe 79, and the intake pipe 69 (see arrow D in FIG. 6b), and the pressure is reduced through the cleaning hose 11 (arrow E in FIG. 6b). ), and the sewage (or sewage and wash water) in the sewage pipe 3 is transferred to the other receiver tank 63 via the water suction hose 97, the suction pipe 95, and the water suction pipe 85 (see arrow F in FIG. 6b). (second cleaning process or cleaning operation). Note that when the water suction hose 97 is not used, the sewage (or sewage and washing water) in the sewer pipe 3 is sucked up into the other receiver tank 63 via the cleaning hose 11, the suction pipe 95, and the water suction pipe 85. . Therefore, the inside of the sewer pipe 3 can be cleaned by pulverizing the deposits such as sludge and sucking up the sewage containing the crushed deposits. Further, the pressure reduction in the suction tank 81 of the suction wheel 19 and the cleaning work of the sewer pipe cleaning robot 5 can be continued without interruption, and the first cleaning process or cleaning work can be shifted to the second cleaning process or cleaning work.

Furthermore, when a detection signal is output from the one side liquid level sensor 99, the one side hatch 107 of one receiver tank 61 is automatically displaced to the open state (FIG. 6c). Therefore, the sewage 111 drawn into one receiver tank 61 flows into the recovery tank 43 of the recovery tank 15. One side hatch 107 automatically returns to the closed state after a predetermined period of time has passed since opening. The sewage 111 collected in the recovery tank 43 is filtered through the window 47, flows into the sewage tank 45 (see reference numeral 112), and flows out into the sewage pipe 3 from the sewage return pipe 55 (d in FIG. 6).

When the sewage sucked into the other receiver tank 63 reaches a predetermined amount and the liquid level of the sewage is detected by the other side liquid level sensor 101, a detection signal is output from the other side liquid level sensor 101, and the intake pipe 69 is The other side intake butterfly valve accommodated in the other side intake valve accommodating portion 77 and the other side water intake butterfly valve accommodated in the other side water intake valve accommodating portion 89 of the water intake pipe 85 are automatically switched to the closed state, The one-side intake butterfly valve accommodated in the one-side intake valve accommodating portion 75 of the intake pipe 69 and the one-side water intake butterfly valve accommodated in the one-side water intake valve accommodating portion 91 of the water suction pipe 85 are automatically opened. It switches to Then, the pressure inside one of the receiver tanks 61 is reduced again via the suction hose 83, the vacuum pipe 79, and the intake pipe 69 (see arrow G in a in FIG. H), and the sewage (or sewage and wash water) in the sewage pipe 3 is returned to one receiver tank via the water suction hose 97, the suction pipe 95, and the water suction pipe 85 (see arrow I in Figure 7a). 61 (first cleaning step or cleaning operation). Note that when the water suction hose 97 is not used, the sewage (or sewage and washing water) in the sewage pipe 3 is sucked up again into one receiver tank 61 via the cleaning hose 11, the suction pipe 95, and the water suction pipe 85. It will be done. Therefore, the inside of the sewer pipe 3 can be cleaned by pulverizing the deposits such as sludge and sucking up the sewage containing the crushed deposits. Further, the pressure reduction in the suction tank 81 of the suction wheel 19 and the cleaning work of the sewer pipe cleaning robot 5 can be continued without interruption, and the second cleaning process or cleaning work can be shifted to the first cleaning process or cleaning work.

Further, when a detection signal is output from the other side liquid level sensor 101, the other side hatch 109 of the other receiver tank 63 is automatically displaced to the open state (FIG. 7b). Therefore, the sewage 111 drawn into the other receiver tank 63 flows into the recovery tank 43 of the recovery tank 15. The other side hatch 109 automatically returns to the closed state after a predetermined period of time has elapsed after opening. The sewage 111 collected in the collection tank 43 is filtered through the window 47, flows into the sewage tank 45 (see reference numeral 112), and flows out into the sewage pipe 3 from the sewage return pipe 55 (FIG. 7c).

By repeating such a switching operation between the pair of receiver tanks 61 and 63, work such as crushing accumulated deposits by the sewer pipe cleaning robot 5 and depressurization in the suction tank 81 of the self-propelled and suction vehicle 19 can be interrupted. Cleaning work can be continued without any problems.

The storage capacity of the recovery tank 43 of the recovery tank 15 can be made twice to six times the storage capacity of each of the receiver tanks 61 and 63, but here, for example, it is approximately four times as large. The upper window 49 is provided to prevent the water level of the sewage 111 in the collection tank 43 from rising too much.

When all the cleaning processes or cleaning work are completed, or when all the cleaning processes or cleaning work are completed and the discharge process is also completed, the sludge etc. 113 contained in the collected sewage has accumulated in the collection tank 43. It becomes. Therefore, as shown in FIG. 8, the suction hose 83 of the absorption wheel 19 is connected to the drain port 58 with the cap 60 removed, and the sludge, etc. 113 is sucked into the suction tank 81. It is preferable to provide a removable stopper (not shown) inside the drain port 58 to prevent sludge, etc. 113 from spilling from the drain port 58 when the suction hose 83 is connected to the drain port 58. After connecting the suction hose 83 to the drain port 58, the stopper is removed and the sludge, etc. 113 is drawn into the absorption tank 81 by the suction hose 83.

Note that the receiver tank device 17 and the recovery tank device 15 can also be configured in a small size and placed in a manhole instead of on the ground.

1 Sewage pipe cleaning system 3 Sewage pipe 5 Sewer pipe cleaning robot 11 Cleaning hose 13 Hose take-up reel device 15 Recovery tank 17 Receiver tank device 19 Suction wheel 41 Bulkhead 43 Recovery tank 45 Sewage tank 47, 49 Window 55 Sewage return pipe 61, 63 Receiver tank

Claims (3)

A pipe cleaning method for cleaning accumulated deposits such as sludge inside a pipe such as a sewage pipe, the method comprising:
A pipe cleaning robot that has a cleaning hose and is equipped with an injection device or a firing device for high-pressure water or the like and can travel inside a pipe such as a sewer pipe; and a receiver tank device to which the cleaning hose of the pipe cleaning robot is connected; It has a recovery tank arranged to receive the discharge from the discharge port of the receiver tank device, a suction tank, and a suction hose connected to the suction tank, and the suction hose is connected to the receiver tank device. a preparation step for preparing a suction device;
The suction via the receiver tank device is used to suck in and clean deposits inside the pipe that have been pulverized by the injection device or the firing device of the pipe cleaning robot disposed in the pipe such as a sewer pipe, etc., using the cleaning hose. a cleaning step in which water in the pipe is sucked in by the cleaning hose using the suction force of the device, and the sucked water is discharged from the cleaning hose to the receiver tank device;
a recovery step of recovering water accumulated in the receiver tank device from the discharge port of the receiver tank device to the recovery tank,
The receiver tank device is provided with a pair of receiver tanks,
The cleaning process includes a first cleaning process in which water sucked in by the cleaning hose is discharged into one of the receiver tanks, and a second cleaning process in which water sucked in by the cleaning hose is discharged into the other receiver tank. have,
The recovery step includes a first recovery step of recovering water accumulated in one of the receiver tanks from the discharge port of one of the receiver tanks to the recovery tank after the end of the first cleaning step; a second recovery step of recovering water accumulated in the other receiver tank from the outlet of the other receiver tank to the recovery tank after the cleaning step of
A method for cleaning inside a pipe, characterized in that the recovery tank is provided with a discharge structure for removing or separating deposits from the collected water and discharging it. 2. The method for cleaning an inside of a pipe according to claim 1, wherein the step of discharging the collected water by the discharge structure is performed during the execution of the cleaning step or from during to after the completion of the cleaning step. 3. The method for cleaning inside a pipe according to claim 1, wherein water is discharged from the recovery tank into the pipe.

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