JP2015167945A - Washing equipment for culvert drain pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device that does not require excavation of soil covering a culvert drain pipe, in a construction for washing and removing soil and sand deposited in the culvert drain pipe.SOLUTION: In a washing device for a culvert drain pipe, position detecting means which is inserted through into the culvert drain pipe buried under the ground to measure a laying position of the culvert drain pipe detects a position of soil and sand deposited in the culvert drain pipe, excavation means provided in an excavation rod opens the culvert drain pipe by contacting the excavation rod to the culvert drain pipe from a surface of the ground just above the position where the soil and sand are deposited in the pipe, for inserting the excavation rod into the culvert drain pipe, then high-pressure washing water is injected from an injection port provided at a distal end of the excavation rod positioned in the culvert drain pipe so as to remove the soil and sand deposited in the culvert drain pipe.

Description

  The present invention relates to an apparatus for removing sediment accumulated in underground drainage pipes buried underground.

Underground drainage pipes are laid on the farmland to discharge excess soil moisture. If the drainage function of these pipes deteriorates due to clogging of the pipe wall or clogging of the soil in the pipes, it is necessary to re-install new pipes, resulting in an economic burden. For this reason, construction work for the maintenance of underdrain pipes by inspection and cleaning is performed.
Agricultural culvert drain pipes include permeable unglazed earth pipes and resin pipes with holes in the pipe walls. As shown in FIG. 1, in the farmland or field A, a hydrophobic material layer C made of crushed stone, shells, rice husks, etc. with good water permeability is laid at the bottom of the soil formation layer B, and the underdrainage pipe 30 is at the bottom. It is buried about 80cm underground. As shown in FIG. 2, this pipe is branched from a trunk pipe 30a, also called a water collecting pipe, and a branch pipe 30b, also called a water absorption pipe, is laid, and the length from the drain outlet to the branch pipe terminal should be 300 m or more. There is also. The drainage pipe has a diameter of 50 to 100 mm, the soil layer varies depending on the field, but is 15 to 20 cm, and the hydrophobic material layer is 45 to 60 cm. (Refer nonpatent literature 1).
As a prior art related to this technical field, there is an attempt by the authors to inspect the situation in the pipe of the culvert drainage pipe and clean the pipe. (Refer nonpatent literature 1). As shown in FIGS. 3 and 4, this system is configured by providing a functional unit main body at the tip of a high-pressure water hose that passes through the pipe. The functional unit main body has an endoscope camera at the tip of the injection nozzle. Prepared and controlled while observing the in-pipe image captured by the camera on the ground. It advances in the pipe with the propulsive force of the washing water ejected from the high pressure water jet nozzle. A high-frequency signal is made to flow through one line of a control signal cable connected to the functional unit body, and this is supplemented by a dedicated instrument to measure the functional unit body position.
In addition, the propulsion aimed at extending the distance of a cleaning device (see Patent Document 1) in a small-diameter pipe with direction control and the self-propelled propulsion device inserted in the pipe, which is provided with the internal functions of the authors. There is a construction method (Patent Document 2).

JP 2005-58904 A JP 2007-29807 A

Summary of Results Presentation 2006, Hokkaido Research Institute Industrial Research Institute

According to the system of Non-Patent Document 1 and Patent Documents 1 and 2, assuming that the functional unit main body at the tip of the high-pressure water hose has reached the position of earth and sand accumulated in the pipe and the position has been measured, When the cleaning is impossible, as shown in FIG. 5, the construction is carried out by digging up soil, cleaning the pipe, repairing the pipe, and refilling it. At this time, it takes time to excavate the soil covering the pipes, damages the field, destroys the soil structure, and there is a problem that heavy machinery cannot be loaded when there are crops.
The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide an apparatus for solving these problems.

In order to solve the above problems, the present invention detects the position of sediment deposited in the pipe by position detection means that is inserted into a underground drainage pipe buried underground and measures the laying position of the pipe. The excavation rod is brought into contact with the pipe from the surface directly above the location, and the pipe is opened and inserted by a cutting means provided in the excavation rod, and then the injection provided at the tip of the excavation rod located in the pipe A culvert drain pipe cleaning device is characterized in that high pressure cleaning water is jetted from the mouth to remove sediment in the pipe.
In addition, the position detection means, a functional unit body is configured at the tip of the high-pressure water hose, the functional unit body includes a high-pressure water injection nozzle, a camera, and an electromagnetic wave transmission device, propelling the inside of the pipe by the high-pressure water injection, It is preferable to provide a culvert drainage pipe cleaning device characterized by having a function of specifying the position of the functional unit main body by an electromagnetic wave receiving device on the ground surface.

In addition, the excavation rod is formed of a hollow tube having an incision means on the tip side and a high-pressure water inlet on the other end side, and one or a plurality of high-pressure water jets are appropriately disposed near the incision means. It is preferable to use a culvert drainage pipe cleaning device characterized by having holes.
The incision means includes a tubular rigid lower end portion, an intermediate member, and a conical rigid body, and a base portion whose apex is directed downward from the axial center toward the distal end side of the tubular rigid body is a cylindrical portion having a diameter that is appropriately smaller than the tubular rigid body diameter. A conical rigid body is provided, and a conical truncated cone or a cylindrical intermediate member having a smaller diameter than the cylinder portion is provided between the upper end of the cylindrical portion of the conical rigid body and the lower end of the tubular rigid body, and the intermediate member It is preferable to use a culvert drainage pipe cleaning device characterized in that the member is provided with one or a plurality of high-pressure injection holes inclined downward.

  In the present invention, since only a part of the work range on the ground is necessary, such as piercing the excavation rod into the underdrainage pipe, extensive excavation of the field is unnecessary, and there is little destruction of the soil structure in this range, Even with crops, damage can be kept to a minimum.

It is explanatory drawing of the underground buried cross section of a culvert drain pipe. It is explanatory drawing of the laying condition of a culvert drain pipe. It is explanatory drawing of the whole construction which concerns on the inspection and washing | cleaning of a culvert drain pipe. It is explanatory drawing of a function part main body. It is explanatory drawing of the conventional construction. It is explanatory drawing of construction by this invention. It is explanatory drawing of the in-pipe washing | cleaning auxiliary | assistance apparatus of this invention. It is explanatory drawing of the other example of the cutting bar of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 3 shows a partial cross-sectional view of the underdrain drainage pipe 30 buried underground in the field A. Here, the main pipe 30a and the branch pipe 30b branched to the main pipe 30a are shown, and the drainage side tip 30ae of the main pipe is exposed from the field slope D and the drainage groove E is provided below the slope.

  The functional unit main body 10 provided at the tip of the high-pressure water hose 11 for sending the high-pressure washing water is inserted from the drain side tip 30ae of the trunk pipe, and the washing water is supplied from the injection nozzle 12 constituting a part of the functional unit main body 10. The inside of the pipe is propelled and propelled by the propelling force of the jet water G, and earth and sand accumulated in the pipe by the jet water flows out from the drain side tip 30ae to the drain groove E. As will be described later, the functional unit main body 10 is equipped with a camera at the tip so that the advancing direction can be controlled by observing the image of the camera, so that it can proceed from the trunk tube 30a to the branch tube 30b. . In this example, the base of the high-pressure water hose 11 is connected to a hose winding device 22 and a high-pressure pump 23 that can be moved by a truck 21, and cleaning water is supplied from a water tank 24. In the figure, an example of the arrangement of personnel to be operated is shown, and the camera image provided in the function unit main body is operated while being monitored by the monitor 25.

  FIG. 4 shows the configuration of the functional unit main body 10 provided on the tip side of the high-pressure water hose. A camera 13 having an illumination 14 is disposed at the tip, and has a mechanism unit 15 for controlling a traveling direction called swinging and an injection nozzle 16 for injecting and propelling cleaning water backward. A control signal cable 17 is connected to the control mechanism unit 15, and an electromagnetic wave transmitting device 18 is configured by causing an electromagnetic wave signal to flow through one of the wires.

Fig. 5 shows the status of the conventional sediment removal work for the branch pipe. An electromagnetic wave signal is sent to the signal cable 17 connected to the functional unit body 10 to transmit the electromagnetic wave, and the position of the functional unit body is observed by the electromagnetic wave receiving device 19 on the ground surface, and the position of sediment accumulation in the pipe is specified. The soil covering the pipe position is excavated, the pipe is cut open, and the sediment F is manually removed. Then repair the pipe and backfill the soil.
This method requires time and labor for excavating the covering soil, resulting in reduced efficiency and increased construction costs. In addition, the field is damaged and the soil structure is destroyed. In addition, when there are crops, the crops in the excavation range cannot be sold, and there is a problem that heavy machinery cannot be carried in itself.

  On the other hand, FIG. 6 shows the situation of the pipe sediment removal work of the present invention. An in-pipe cleaning auxiliary device 1 according to the present invention shown in FIGS. 6 and 7 includes an excavation rod 2 and a portable pump 3 and a water tank 5 that are large enough to be carried. The cutting bar 2 is formed of a tubular rigid body 2p having an incision means 2d on the tip side and a high-pressure water injection port 2b on the other end side and having a hollow axial center water channel 2c in the axial center. One or more high-pressure water injection holes 2a are provided at appropriate places. In the figure, two high-pressure water injection holes 2a are shown. The direction of the high-pressure injection 2a is preferably inclined downward as shown in the figure. The incision means in this example is shown as a conical structure with a pointed tip, but it may have a shape such as a triangular pyramid or a quadrangular pyramid. Further, the excavation rod 2 may have a structure having the next to determine the direction or a spiral structure having an excavation propulsion function by rotation. In this case, it is preferable to provide a handle for rotation by a human operation on the upper part of the cutting bar. Moreover, it is preferable that the upper part of the cut-off rod 2 is appropriately provided with a direction indicating function indicating the opening direction of the high-pressure water injection hole 2a.

  With reference to FIG. 6, the situation of the removal work of sediment in the pipe of the present invention will be described. First, an electromagnetic wave signal is sent to the control signal cable 17 connected to the functional unit body 10 to transmit the electromagnetic wave, and the position of the functional unit body is observed by the electromagnetic wave receiving device 19 on the ground surface, and the position of sediment accumulation in the pipe is determined. Identify. Next, the upper end of the cutting bar 2 is pressed or beaten, and the cutting bar 2 is stabbed into a specific position at the measured position. Is penetrated so as to be located in the pipe laying direction and in the pipe. Thereafter, the hose 4 of the portable pump 3 is connected to the high-pressure water injection port 2b, and high-pressure washing water is injected from the high-pressure water injection hole 2a. Soften, wash and remove. Washing water is supplied from a water tank 5. The situation after removal of the sediment in the pipe is observed on the monitor 25 by the camera 13 of the previous functional unit body 30.

  Next, another example of the incision means in the cutting bar 2 shown in FIG. 7 will be shown. As shown in FIG. 8, the incision means 2d of this example is composed of a tubular rigid lower end 2pe provided at the lower part of the tubular rigid body 2p, an intermediate member 2h, and a conical rigid body 2dt provided on the distal end side. The corner of the lower end 2pe of the tubular rigid body is preferably formed with a curved surface. A conical rigid body 2dt is formed on the distal end side of the tubular rigid body. The conical rigid body 2dt is composed of a cylindrical portion whose base is appropriately smaller in diameter than the diameter of the tubular rigid body 2p. Between the upper surface end 2de of the cylindrical portion of the conical rigid body 2dt and the tubular rigid body lower end portion 2pe, a cylinder having a smaller diameter than the column portion or a columnar trapezoidal intermediate member 2h facing downward is provided. As shown in the figure, the intermediate member is provided with a high-pressure injection hole 2a to inject high-pressure water from the axial center water channel 2c. The high-pressure injection hole 2a is preferably provided so as to be inclined downward. In the figure, the case of one high-pressure injection hole 2a is shown.

Next, how to use this example will be described. As in the example of FIG. 7, the upper end of the cutting bar 2 in this example is pressed or hammered, and the cutting bar 2 is pierced into a specific location of the measured position, and the drain pipe is cut through the soil and the hydrophobic material. The high pressure injection hole is inserted into the pipe in accordance with the laying direction. At this time, first, the conical rigid body 2dt cuts the drain pipe and enters the pipe, and then passes through the smaller diameter intermediate portion 2h, and then the outer surface of the tube opening contacts the lower diameter tubular rigid lower end 2pe. Therefore, it is expected that this time will be recognized as an appropriate cutting bar position. Next, high-pressure washing water is jetted from the high-pressure water jet holes 2a to wash and remove. Thereafter, the work is started to pull out the cutting bar upward.In FIG. 8, when the cutting bar is moved upward, the opening end 30he of the tube comes into contact with the upper surface end 2de of the cylindrical part and further moves upward. The opening end 30he is turned up to the outside of the pipe, and this becomes an element that closes the opening, which is expected to repair the drainage pipe that is opened.
According to the present invention, since it is not necessary to excavate a wide range of soil around the sedimentation site in the pipe, it is possible to minimize the destruction of the soil structure and crop damage without putting heavy machinery and labor.

DESCRIPTION OF SYMBOLS 1 In-pipe washing auxiliary | assistant apparatus 2 Cleaving rod 2a Injection hole 2b High pressure water inlet 2c Axis center channel 2d Cutting means 2h Middle part 2de Cylindrical part upper surface end 2pe Tubular rigid body lower end part 3 Portable pump 4 High pressure water hose 5 Water tank 10 Function part Main body 11 High-pressure water hose 12 Injection nozzle 13 Camera 14 Illumination 15 Control mechanism 16 Injection nozzle 17 Control signal cable 18 Electromagnetic wave transmission device 19 Electromagnetic wave reception device 21 Truck 22 Hose winding device 23 High-pressure pump 24 Water tank 25 Monitor 30 Underdrain drainage Pipe 30a Trunk pipe 30b Branch pipe 30ae Drain side tip A Field B Soil layer C Hydrophobic material layer D Slope E Drainage groove F Sediment sediment G in the pipe G Spray water H Spray water

Claims (4)

The position detecting means that is inserted into a underground drainage pipe buried underground and measures the laying position of the pipe detects the position of the sediment deposited in the pipe, and the excavation rod is inserted into the pipe from the surface directly above the sediment accumulation position in the pipe. The tube is opened and inserted by an incision means provided in the excavation rod in contact with the excavation rod, and then high-pressure washing water is injected from an injection port provided at the tip of the excavation rod located in the tube. An underdrain drainage cleaning device characterized by removing sedimentary sediment. The position detecting means includes a functional part main body at the tip of the high-pressure water hose, and the functional part main body includes a high-pressure water injection nozzle, a camera, and an electromagnetic wave transmitting device, and propels the pipe by the high-pressure water injection, The culvert drainage pipe cleaning apparatus according to claim 1, which has a function of specifying a position of the functional unit body by an electromagnetic wave receiver. The excavation rod is formed of a hollow tube having an incision means on the tip side and a high-pressure water injection port on the other end side, and one or a plurality of high-pressure water injection holes are provided at appropriate locations near the incision means. The underdrain drain pipe cleaning device according to claim 1 or 2, further comprising: The incision means is composed of a tubular rigid lower end, an intermediate member, and a conical rigid body, and a cone having a base portion whose apex is directed downward from the axial center on the distal end side of the tubular rigid body and a cylindrical portion having a diameter appropriately smaller than the tubular rigid body diameter. A cylindrical rigid member is provided between the upper surface end of the cylindrical portion of the conical rigid body and the lower end portion of the tubular rigid body, and a conical truncated cone or a cylindrical intermediate member having a smaller diameter than the cylindrical portion diameter is provided on the intermediate member. The underdrain drain pipe cleaning device according to any one of claims 1 to 3, further comprising one or a plurality of high-pressure injection holes inclined downward.

Images