JPH0669823U - In-pipe inspection device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an in-pipe inspection device that is capable of reliable and smooth self-propelled running without being influenced by the pipe length and bending. [Structure] A trolley 1 which is inserted into a pipe 8 to be inspected and travels in a pipe axis direction is provided. This trolley 1 has a CCD
The in-pipe inspection means including the camera 2 and the transmitter 3, the rope winding means 19 for winding the rope, and the power supply battery 4C for supplying power to them are attached. On the other hand, the tow rope 18 has one end fixed outside the tube 8 and the other end fixed to the winding drum 20 of the rope winding means 19 and inserted into the tube 8. By the winding operation of the rope winding means 19, the carriage 1 travels by itself.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an in-pipe inspection device equipped with a self-propelled carriage and capable of inspecting an internal state of a pipe such as an existing pipe line.

[0002]

[Prior art]

 This type of conventional in-pipe inspection device includes a device that uses a fiberscope or a television camera.In the fiberscope, the inside of the tube can be visually inspected from the outside by inserting the objective part at the tip to the required position. Yes, the TV camera is a device that is mounted on a dolly, sends this dolly into the pipe, and displays the internal state received by the TV camera on a display device outside the pipe via a cable connected to this camera. .

[0003]

[Problems to be solved by the device]

 Conventional inspection devices are manufactured by special order, are considerably expensive unlike general-purpose products, and require high skill in handling, and must rely on specialists. The problem is that the inspection cost is quite high.

Further, the fiberscope is not suitable for inspecting a large-diameter pipe, and is mainly used for a small-diameter. The reason is that if the number of pixels (fiber number) is reduced, it will not bend. Therefore, if it is applied to a large aperture, the image quality will deteriorate as it is, so it is necessary to increase the number of pixels. If you don't turn. On the other hand, it is possible to use a CCD (charge coupled device) camera as an alternative to the TV camera, but it must be mounted on a truck like a truck and run inside the pipe, and most of them are towed by a tow rope. It is a multi-force traveling method that pulls from the outside of the pipe, and traveling operation is not easy if the pipeline is long, and if this is made to be a self-propelled structure in which the traveling drive device is mounted on the trolley, it becomes a complicated structure. There is a problem that the cost is higher. An object of the present invention is to provide an in-pipe inspection device that can be formed into an inexpensive device with a simple mechanism and that enables reliable and smooth self-propelled traveling without being influenced by the pipe length or the state of bending. To do.

[0005]

[Means for Solving the Problems]

 DISCLOSURE OF THE INVENTION The present invention relates to a carriage that is inserted into a pipe to be inspected and travels in the pipe axial direction, an in-pipe inspection means that is attached to the pipe and that captures an image of the inside of the pipe and outputs a photoelectrically converted image pickup signal, and the carriage. A power supply battery to be mounted on the trolley, and a rope winding means attached to the trolley and connected to the power supply battery for winding the rope, and inserted into the pipe and fixed at one end outside the pipe. The other end includes a towing rope fixed to the winding drum of the rope winding means.

[0006]

[Action]

 According to the present invention, the trolley which is inserted into the pipe for traveling is provided with a power supply battery and a rope winding means driven by the battery, while the tow rope is inserted into the pipe. Then, one end is fixed outside the pipe, and the other end is fixed to the winding drum of the rope winding means. To drive the bogie, a simple means such as driving the rope take-up means such as an electric winch device to drive the bogie is possible, and the bogie advances toward the rope fixing point outside the pipe. Therefore, regardless of the number of bends and the total length of the pipe, the truck can be stably and smoothly run to reliably inspect the inside of the pipe.

[0007]

【Example】

 FIG. 1 is a schematic structural diagram of an in-pipe inspection apparatus according to an embodiment of the present invention. The device shown in the figure includes a carriage 1, an in-pipe inspection means 2 realized by a CCD camera, a transmitter 3, a battery 4C for power supply, a lamp 5B, a flexible lead wire 6, and a towing rope 18. A device for visually inspecting the state of the inner wall surface of a pipe 8 such as a large-diameter steel pipe, which includes a rope winding means 19 realized by an electric winch and a receiving means 7 realized by a television monitor. . The carriage 1 can be inserted into the pipe 8 and run in the pipe axial direction.

FIG. 2 is a plan view of the dolly 1 without the upper half of the outer cylinder, FIG. 3 is a front view showing a partial cross section of the dolly 1, FIG. 4 is a left side view of the dolly 1, and FIG. It is a figure. The dolly 1 includes a cylindrical casing 9 formed by joining an upper semi-cylindrical portion 9A and a lower semi-cylindrical portion 9B, and four symmetrically-distributed parts on the outer periphery of the casing 9 near both ends. The casters 10 are provided at a total of eight places. The upper semi-cylindrical portion 9A and the lower semi-cylindrical portion 9B are formed of a steel plate having a thickness of about 2 mm, one abutting portion is connected by a hinge 11, and the other abutting portion is elastically hooked. It can be opened and closed by a latch 12 that can be opened.

In the dolly 1, a shelf 13 is horizontally arranged below a casing 9, and a CCD camera 2, for example, a wide-angle 8 mm television camera, a transmitter 3, and two lamps 5A and 5B are provided. Three power supply batteries (abbreviated as batteries) 4A, 4B, 4C and an electric winch 19 are attached to the shelf plate 13.

The CCD camera 2 is mounted at the center of the shelf plate 13, and is fixed forward so that the center of the lens matches the cylindrical center axis of the casing 9. The transmitter 3 is integrally attached to the rear part of the CCD camera 2 and can convert an image pickup signal output by the CCD camera 2 by image pickup into a corresponding radio wave signal to transmit a radio wave. The transmitted radio wave signal is radiated into the atmosphere through a rod antenna 14 protruding rearward from the casing 9. The CCD camera 2 and the transmitter 3 constitute in-pipe inspection means.

On the other hand, the lamps 5A and 5B are attached to the shelf plate 13 using attachment fittings, are located on the left and right upper sides of the lens with respect to the CCD camera 2, and are fixed so that the optical axes thereof face forward. It Further, three batteries 4A, 4B, 4C are mounted around the CCD camera 2 on the shelf board 13, the batteries 4A, 4B are for the respective lamps 5A, 5B, and the battery 4C is for the CCD camera 2 and the transmitter. 3 and electric winch 19 are respectively connected as power sources.

The electric winch 19 includes a winding drum 20, a servomotor 21 of a prime mover, and a gear mechanism 22. The winding drum 20 is attached to a lower surface of the shelf board 13 and has a rotating shaft as a trolley. 1, the servo motor 21 is mounted on the upper surface of the shelf board 13, and the output shaft is arranged in parallel with the winding drum 20. Further, the gear mechanism 22 includes, for example, a gear fitted to the rotation shaft of the winding drum 20, a gear fitted to the output shaft of the servomotor 21, and a chain suspended between the gears by an endless chain. Formed by. The gear mechanism 22 is not limited to this structure, and various known gear mechanisms such as a reduction gear box can be used instead.

In the electric winch 19, the rotation of the servo motor 21 is transmitted to the winding drum 20 via the gear mechanism 22, and the pulling rope 18 described below is wound around the winding drum 20 from the end. The carriage 1 is moved forward. The servo motor 21 is a DC variable speed motor, and is supplied with power from a battery 4C mounted on the shelf board 13.

The flexible wire 6 having a length equal to or longer than the traveling distance required for the inspection by the carriage 1 is prepared, and one end thereof is attached to a retaining ring (not shown) provided at the rear portion of the carriage 1. After binding, the other end is pulled out of the tube 8 and wound around, for example, a drum. As the flexible conductor 6, for example, a coaxial cable for a television camera is used so that it serves both as an antenna and as a tow. That is, the radio signal transmitted from the transmitter 3 is used as an antenna for guiding the radio signal to the flexible conducting wire 6 by a radio wave induction phenomenon and guiding it outside the pipe, and also when the carriage 1 is retracted in the pipe 8 It can also be used as a rope. Of course, in the present invention, the flexible wire 6 is directly connected to the transmitting end of the transmitter 3 to directly transmit the radio wave signal, and a different rope is prepared for towing the carriage. It may have a structure in which it is attached to 1.

On the other hand, the television monitor 7 is formed by the receiving antenna 15 and the television receiver 16 and is installed at a location apart from the tube 8 in a good working environment. This television monitor 7 receives a radio wave signal transmitted into the air from a rod antenna 17 connected to the outer end of the flexible conductor 6 to the tube 8 at a transmitting antenna 15 and then at a detecting portion of a television receiver 16. It is possible to convert the original inspection signal and display it on the display unit of the television receiver 16.

This embodiment is used to inspect the lining layer and the welded portion on the inner surface of the pipe 8 by the procedure described below. First, a towing rope 18 is inserted into the pipe 8, and one end of the rope 18 is fixed to a rope fixing metal fitting 23 attached to the end of the pipe 8, while the other end is inserted into the other end of the pipe 8 immediately before being inserted. The winding drum 20 in 1 is wound. The carriage 1 is equipped with a CCD camera 2, a transmitter 3, batteries 4A to 4C, lamps 5A and 5B, and an electric winch 19. After the flexible conductor 6 is attached to the carriage 1, a pipe 8 Insert the trolley 1 into the pipe from the other end and move forward. This traveling is performed by winding the electric winch 19, and in FIG. 1, the carriage 1 travels in the pipe 8 from left to right.

Simultaneously with this running operation, the CCD camera 2 and the transmitter are operated, and the lamps 5A and 5B are turned on.

Since the trolley 1 is provided so as to project around the front and rear portions of the casing 9 at positions where the free casters 10 are dispersed, the dolly 1 is in a state in which the casters 10 are evenly contacted with the inner wall of the pipe 8. The vehicle travels and moves forward while the central axis of the truck 1 matches the central axis of the pipe 8. Therefore, the CCD camera 2 whose lens axis is aligned with the center of the carriage 1 can uniformly image the entire peripheral surface of the inner wall illuminated by the lamps 5A and 5B.

The inspection signal converted from the image of the CCD camera 2 is converted into a radio wave signal by the transmitter 3, and the radio wave signal is received and transmitted by the flexible conductor 6 attached to the carriage 1 and its end is transmitted. It is transmitted from the antenna 17 attached to the. This transmitted radio wave is received, detected and imaged on the TV monitor 7 at a remote location, so that the inside of the tube can be observed at the remote location. In this series of inspections, the transmission cable from the pipe 8 to the TV monitor 7 is not required, and the pipe 8 is installed at a high place or in a situation where it is difficult to send and receive signals due to the presence of obstacles. However, the TV monitor 7 can be installed in a good working environment for safe and reliable observation.

According to the present embodiment, when used for observing a 300 mm diameter steel pipe in the pipe, a 90 ° elbow bend at a total length of 30 m can be used to confirm the rust adhesion state in two pipelines, and at a total length of 120 m, 90 °. ° The condition of the resin lining layer in the four pipelines with elbow bends one year later could be confirmed without any problems.

It should be noted that the present invention can be used not only for in-pipe inspection as shown in the embodiment but also for judging the cleaning degree in the pipe, and the trolley 1 is equipped with a spray gun. At the same time as the inspection, the inside of the pipe can be painted or coated with resin, and the trolley 1 and each member mounted on it can be used underwater. It is also possible to spray and perform leak repairs.

[0022]

[Effect of device]

 As described above, according to the present invention, an in-pipe inspection means such as a CCD camera, a rope winding means such as an electric winch, and a power source battery for supplying power to them are mounted on a trolley that is inserted into a pipe for traveling. Is provided, and the tow rope whose one end is fixed outside the pipe is wound by the rope winding means. Therefore, as long as there is a tow rope in the pipe, the trolley can travel smoothly in one direction regardless of the number of bends and the bending state of the pipe, and the in-pipe inspection can be reliably and easily performed. In addition, the operation for traveling the trolley is very simple and requires only starting and stopping the rope winding means, which is very convenient when remotely controlling from outside the pipe.

[Brief description of drawings]

FIG. 1 is a schematic structural diagram of an in-pipe inspection device according to an embodiment of the present invention.

FIG. 2 is a plan view of the cart 1 shown in FIG. 1 with an outer cylinder upper half portion removed.

FIG. 3 is a partial cross-sectional front view of the carriage 1 shown in FIG.

FIG. 4 is a left side view of the carriage 1 shown in FIG.

5 is a right side view of the carriage 1 shown in FIG.

[Explanation of symbols]

 1 dolly 2 CCD camera 3 transmitter 4C power supply battery 8 tube 18 traction rope 19 rope winding means 20 winding drum

Claims (1)

[Scope of utility model registration request] 1. A trolley which is inserted into the pipe to be inspected and travels in the axial direction of the pipe, and an in-pipe inspection means which is attached to the trolley and which images the inside of the pipe and outputs a photoelectrically converted image pickup signal, A battery for power supply mounted on a truck, a rope winding means attached to the truck and connected to the battery for power supply to wind a rope, and inserted into the pipe,
An in-pipe inspection device, comprising: one end fixed outside the pipe, and the other end fixed to the winding drum of the rope winding means.