JPH07189334A - Washing and examination for inside of sewage pipe, etc. - Google Patents

Abstract

PURPOSE:To wash and examine the inside of a sewage pipe or the like by moving a washing nozzle forward and backward. CONSTITUTION:An extremely small television camera 17 and an illuminating lamp 18 are unitedly fitted within the tip of a washing nozzle 14 which is attached to the tip of a high pressure hose 9 led out of the hosedrum 2 of a high pressure washing car 1 and advanced with washing water high pressure jetted backward, and during the retreat of the washing nozzle 14 being due to the winding of the high pressure hose 9, filth in a pipe line is scraped up and cleaned by high pressure injection. During the retreat of the washing nozzle 14, the inside of the pipe line is photographed by the extremely small television camera 17 at the tip of the washing nozzle 14, and its image is projected on a monitor 3 set on the side of the high pressure washing car through wiring 5, 6 unitedly provided on the high pressure hose 9. Thus a washing process and a pipe line examining process can be carried out at once during the advance and retreat of the single washing nozzle 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cleaning and investigating a sewer pipe or the like, which is capable of simultaneously cleaning and inspecting a sewer pipe which is a small diameter pipe.

[0002]

2. Description of the Related Art Conventionally, a cleaning nozzle attached to the tip of a high pressure hose connected to a high pressure cleaning vehicle is used for cleaning the inside of a sewer pipe or an indoor drainage pipe, which is a small-diameter pipe that is not commonly used by workers. To the specified pipe line, and using the reaction of the high-pressure jet of washing water as a reaction force to move it forward to feed the washing nozzle to the desired distance, then retract the high-pressure hose to retract it, and eject it backward when it retracts. The cleaning water is used to scrape and clean the pipe wall while scraping off dust and dirt. In addition, as the in-pipe inspection in the pipeline, after the cleaning step, for example, the television camera mounted on the skit is transported in the pipeline with a self-propelled vehicle or a tow line that is separately carried in, and a picture is taken again with the television camera. The image is displayed on the monitor of a TV car placed on the ground, and a predetermined pipe inspection (cracking of the pipe, depression, displacement of the connection, clogging, etc.) is performed.

[0003]

That is, in the conventional pipeline cleaning and pipeline survey, a high-pressure cleaning vehicle, a television vehicle, and a dedicated work vehicle such as a nozzle operation work vehicle must be mobilized.
Moreover, the work became a double labor and forced to perform a troublesome operation. However, with the recent development of television cameras, industrial televisions can be made smaller and smaller, and new applications and developments are being sought for inspection of sewer pipes and the like.

In view of the above situation, the present invention aims to provide a method for cleaning and investigating the inside of a sewer pipe or the like which solves the above problems by incorporating an endoscopic miniature television camera in the cleaning nozzle for high pressure cleaning. It is what

[0005]

According to the present invention, a miniature television camera and lighting are provided at the tip of a washing nozzle which is attached to the tip of a high-pressure hose derived from a hose drum of a high-pressure washing vehicle and jets washing water at a high pressure backward. Equipped with a built-in lamp, when high pressure hose is retracted, high pressure jet is used to scrape and clean the conduit dirt, and at the time of this retract, the inside of the conduit is photographed with a micro TV camera at the end of the washing nozzle. The image is displayed on the monitor equipped on the high-pressure washing vehicle side via the wiring integrated with the high-pressure hose, and the inside of the pipeline is investigated.

[0006]

As described above, in use, a washing nozzle having a very small television camera incorporated in the tip is exposed to a predetermined sewer pipe, and in this state, high pressure washing water is discharged from a high pressure washing car placed on the ground using a high pressure hose. The water is sent to the cleaning nozzle at the tip, and this cleaning water is ejected rearward from the ejection holes facing the rear of the cleaning nozzle, so that the cleaning nozzle is propelled forward in the pipe line in response to the ejection reaction. At this time, filth, dust, etc. adhering to the pipe wall are washed out with high-pressure washing water. Of course, since the minimum television camera at the tip of the cleaning nozzle is incorporated into the minimum, it does not hinder the forward movement. After the washing nozzle has moved a predetermined distance, it is wound up by the hose drum of the high-pressure washing car and the washing nozzle is retracted against the propulsion of the high-pressure washing water. Clean with water pressure. When the washing nozzle is retracted, the control unit provided in the high-pressure washing car is operated to illuminate the illumination lamp to illuminate the inside of the pipe and take a picture with a micro TV camera, and the image signal is monitored via the wiring (signal line) of the high-pressure hose. The inside of the pipeline is imaged and the pipeline is inspected.

[0007]

The present invention will be described below with reference to the drawings of the embodiments.

First, the high-pressure washing vehicle 1 has a hose drum 2 arranged at the rear part thereof, and a TV monitor 3 and a TV camera operation control unit (device) 4 at the rear part 1a of the vehicle body near the hose drum 2. A signal line 5 and a power line 6 connected to the control unit 4 are connected to a hose thick portion 9a of a high pressure hose 9 which is led out from a slip ring type transmission mechanism 7 provided on the side of the hose drum 2 via a fixed shaft 8. They are integrally embedded (in the figure, for example, a hose with an 8-core wire) to establish communication. The core type high pressure hose 9 in which the signal line 5 and the power line 6 are embedded in this way
Is fitted to the fitting tube portion 12 in which a water flow hole 11 is arranged with the tip of the nozzle connector plug portion 10 at the center, and the signal line 5 and power supply line 6 drawn from the end of the high-pressure hose 9 are connected to the base end of the plug. Connect to terminal pin 13. The base end fitting portion 10a, which is a wide mouth of the connector plug portion 10, is fitted into the connecting portion 14a provided at the rear end of the cleaning nozzle 14, and the cap 15 disposed on the outer periphery of the base end of the connector plug portion 10 is used as the cleaning nozzle. 1
4 is connected to the threaded portion 16 formed on the outer periphery of the connection portion 14a. In this case, the cleaning nozzle 14 is a photographing section 19 in which a CCD type TV camera 17 is arranged at the front end of the center and halogen lamp illumination lamps 18 are arranged on both sides of the front portion, and an injection nozzle 20 with the rear portion facing rearward. A plurality of high-pressure water tanks 21 are provided for partitioning into a jet propulsion unit 22, and a camera control 23 is provided behind the television camera 17 of the photographing unit 19, and the camera control 2 is provided.
3 and the signal line 5 and power line 6 led from the illuminating lamp 18 are connected to a power receiving wiring board board 25 arranged at the rear end through a wiring duct 24 formed in the jet propulsion unit 22, and this wiring board board 25 is connected.
The terminal pin 1 facing the connection end of the connector plug portion 10.
3 is brought into contact.

Next, a specific description will be given of the cleaning / inspection of the predetermined pipeline. For example, the high-pressure cleaning vehicle 1 is made to stand by at the ground position of the manhole B near the sewer pipe A to be cleaned / inspected.
The hose drum 2 of the high-pressure washing car 1 is attached to the drum bearing 2a.
The high pressure hose 9 is rotated by rotating the drum shaft 2b supporting the
And the cleaning nozzle 14 attached to the tip of the high-pressure hose 9 is carried into the sewer pipe A.

Here, the control unit 4 is appropriately operated to pressurize the water from the tank of the high-pressure washing vehicle 1 by a known pressurizing means and feed it as high-pressure water (for example, 200 kg / cm ² ),
If the high pressure water inlet 2c passes through the fixed shaft 8 to the high pressure hose 9 wound around the drum and is guided to the tip end side, the high pressure water tank portion 21 of the jet propulsion portion 22 of the washing nozzle 14 at the tip of the high pressure hose 9 is introduced. Since it is ejected from the nozzle 20 directed rearward from the cleaning nozzle 14, the cleaning nozzle 14 is propelled by a reaction force caused by the reverse injection of the high-pressure water C to move forward by itself. By jetting this high-pressure water, dirt and the like adhering to the pipe wall is washed out.

After that, after the cleaning nozzle 14 has advanced an appropriate distance (the feeding length is measured by an encoder or the like attached to the end of the hose drum 2), the forward rotation of the hose drum 2 is controlled by a hydraulic motor (not shown). (1) is reversed by driving the cleaning nozzle 14 to wind (backward) against the propulsive force of the cleaning nozzle 14, and the high pressure water C jetted backward from the reverse cleaning nozzle 14 causes the dirt to be washed out from the pipe wall. While scraping, etc., it is sent to the rear one by one to the manhole B side to clean the inside of the pipe.

When the cleaning nozzle 14 is moved backward, the control unit 4 of the monitor 3 of the high-pressure cleaning vehicle 1 is appropriately operated so that the television camera 17 and the illuminating lamp 1 built in the tip of the cleaning nozzle 14 can be operated.
8 is illuminated by the power supply from the signal line 5 and the power supply line 6 to illuminate the inside of the conduit for photographing. This video signal is guided to the monitor 3 via the signal line 5, a screen in the pipeline is displayed on the monitor 3, and cracks in the pipeline or depression of the pipeline are detected.

That is, since the pipeline inspection of the sewer pipe A can be carried out at the same time when the cleaning nozzle 14 for cleaning the pipeline is retreated, the troublesome operation twice as in the conventional pipeline inspection can be omitted. .

[0014]

As described above, the method for cleaning and inspecting sewerage pipes and the like according to the present invention provides a high pressure cleaning vehicle with a TV monitor directly, and a micro TV camera and an illumination lamp inside the tip of the cleaning nozzle. The inside of the pipeline is cleaned under high pressure by back-injecting high-pressure water from the washing nozzle, and when the washing nozzle retracts due to the winding of the high-pressure hose, the pipeline dirt is scraped and at this time the illumination lamp is turned on and the pipeline is turned on. Since the interior is illuminated and the image is taken with a very small TV camera and the image is shown on the monitor, the two steps of the conventional sewer pipe cleaning work and investigation work can be omitted in one process, and cleaning and
The investigation is simplified and the speed cleaning and the investigation can be performed.
Of course, if necessary, the inside of the conduit may be photographed when the cleaning nozzle advances. Moreover, since the present invention incorporates the micro TV camera at the tip of the cleaning nozzle, the movement of the cleaning nozzle and the movement of the micro TV camera are integrated, and the distance measurement is not misaligned when there is a defect in the pipe line. The repair work can be surely performed.

In the above description, the sewer pipe is described, but the same applies to the cleaning / inspection of the pipeline in the indoor drainage pipe.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing a method for cleaning and investigating a sewer pipe showing an embodiment of the present invention.

FIG. 2 is a cutaway side view of a main part of a hose drum.

FIG. 3 is an explanatory diagram of signal line separation of the hose drum.

FIG. 4 is a sectional view of a connector plug portion at the end of a high pressure hose.

FIG. 5 is a bottom view of the same.

FIG. 6 is a cross-sectional view of a high pressure hose.

FIG. 7 is a cross-sectional view of a cleaning nozzle.

[Explanation of symbols]

 1 High-pressure washing car 2 Hose drum 3 TV monitor 5 Signal line 6 Power line 9 High-pressure hose 14 Washing nozzle 17 Micro TV camera 18 Lighting lamp 20 Jet nozzle

Claims (1)

[Claims] 1. A high-pressure hose equipped with a micro TV camera and a built-in lamp at the tip of a washing nozzle that is attached to the tip of a high-pressure hose derived from a hose drum of a high-pressure washing car and injects washing water at a high pressure backward. At the time of retreat due to the winding of the pipe, the pipe dirt is scraped and cleaned by high-pressure jet, and at the time of the retreat, the inside of the pipe is photographed by the micro TV camera at the end of the cleaning nozzle, and this image is integrated with the high-pressure hose. A method for cleaning and inspecting sewer pipes, etc., characterized by displaying on a monitor equipped on the side of the high-pressure washing vehicle via the