JPS597891B2 - Internal inspection method for high-rise chimneys - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an internal inspection device for the internal brickwork of a high-rise steel chimney or a concrete chimney in which acid-resistant castable is sprayed onto the inner surface of the cylinder.

In a high-rise chimney, as shown in Fig. 1, vertical reinforcements C and horizontal reinforcements d are arranged on studs b attached to the inner surface of a cylinder body a made of iron plate, wire laths e are attached, and acid-resistant castables f are installed. The interior is lined by spraying with a gun, but the high temperatures during use, acidic gases such as sulfur dioxide gas and sulfuric anhydride gas, and the sulfuric acid produced by the same gases gradually erode and cause the lining to peel off, so this needs to be repaired. There is a need to.

However, although high-rise chimneys are generally over 100 meters in height, and manholes and platforms for internal inspection and work are provided every 20 meters between them, it is extremely difficult to see inside only by looking through the manholes. It is considered that gondolas could be hung from each platform and workers could ride on them to inspect them, but this poses a safety problem, and in some cases, gondolas have fallen to the bottom of chimneys. The extent of the damage is estimated by the amount of castables, or repairs are made by inspecting from the manhole.

In order to improve the above-mentioned points, a lifting platform equipped with a television camera was installed inside a high-rise chimney, and the television camera was rotated at a predetermined height position while photographing the inner peripheral wall of the chimney. The inside of a chimney was created by moving the lifting platform to the next height position and photographing the inner wall surface of the next stage chimney, and repeating this process one after another to photograph the inner wall surface of the chimney over the desired height range. An inspection method has been proposed (Japanese Patent Laid-Open No. 51-5
(See Publication No. 2530).

According to the method for inspecting the inside of a chimney using a television camera,
The internal situation of the chimney can be observed on the ground using a video monitor, and the record can be stored using a video tape recorder. As a result, not only is the device large-scale and requires a great deal of cost, but it is also extremely difficult to implement in the case of a chimney that is not vertical but slopes, such as a multi-story chimney.

The present invention improves the above points, and allows the interior of a high-rise chimney to be photographed relatively inexpensively, and even in the case of a sloping chimney, by positioning a television camera approximately at the center of the chimney. The purpose is to provide inspection equipment.

In order to achieve the above-mentioned object, the present invention utilizes a plurality of manholes provided in a sloping high-rise chimney, and installs an arbitrary number of guide rope guide fittings toward the inside of the chimney, and installs them near the top of the chimney. A fixed guide rope is inserted through each of the guide fittings and suspended into the chimney, and the lower end of the guide rope is wrapped around a winch via a pulley whose position can be adjusted at the bottom of the chimney. The tension of the guide rope is adjusted, one end of the guide beam is loosely inserted into the guide rope, and a television camera is suspended from the other end of the guide beam.
The guide beam is suspended in a tilted high-rise chimney by a hanging rope so as to be able to rise and fall freely, and the guide beam with the TV camera suspended is guided by the rope, and the tension of the guide rope is adjusted by the winch, thereby increasing the slope of the chimney. The present invention is characterized in that the television camera is positioned approximately at the center of the chimney regardless of the situation.

An example of the implementation of the present invention will be described below with reference to FIGS. 2 to 4.

FIG. 2 is a schematic explanatory diagram showing the state in which the present invention is applied to a three-piece high-rise chimney with a height of 153 m, in which 1 is a high-rise chimney, and 2 is a platform installed on the high-rise chimney at appropriate intervals. The lower part of each high-rise chimney 1 is expanded in three directions and is inclined.

In the present invention, a beam 3 is fixed to a manhole provided in the uppermost platform 2', a guide rope pulley 4 and a hanging rope pulley 4' are attached to the beam, and an electric winch installed on the ground is installed. The hanging rope 6 let out from the pulley 4 on the platform and the pulley 4
' and into the high-rise chimney 1, and a guide beam 15 on which a television camera 7 is suspended is connected to the lower end of the hanging rope.

72 is a photographing window hole for a television camera. Reference numeral 9 denotes a control cable for the television camera, which is led out from below the high-rise chimney 1 and connected to the control box 10.

This control cable should be of a length appropriate to the height of the chimney to be inspected.

Although detailed illustration thereof is omitted, the control box houses an operation control unit for the electric winch and the television camera.

Reference numeral 11 denotes a monitor television that receives images photographed by the television camera, and 12 denotes a VTR for recording images photographed by the television camera. The video is recorded on VTRI 2, and at the same time, the height position, circumferential position, presence or absence of damage, and other necessary information of the screen are recorded, and the recorded videotape thus obtained is used as an inspection record. It is something.

In this case, the television camera is rotated 360 degrees at a certain height according to a command from the control box 10 and takes pictures of the internal wall of the chimney, and when the desired stage of photography is completed, the electric winch 5 is operated to display the TV camera. Since the camera is raised or lowered to the required height and the next photograph is taken at that position, there is a risk that the television camera will be out of focus if it is not positioned approximately at the center of the chimney. Simply hanging the camera with a hanging rope does not allow the rotational position to be regulated.

In this case, the present invention is designed to restrict the guide beam 15 that supports the television camera by the guide rope 14.

That is, a guide rope 14 with one end fixed to a beam 3 attached using the top platform is suspended inside the chimney 1 via a pulley 4, and an arbitrary number of guide ropes are attached using manholes other than the top tier. Rope guide fitting 13
protrudes toward the inside of the chimney, and each of the plurality of guide fittings 1
A guide rope 14 is inserted into the annular portion at the tip of the chimney 3, and the lower end of the guide rope 14 is connected to a guide rope adjustment device 16 installed at the lower end of the chimney.

As shown in FIG.
It consists of a pulley 17 that can be fixed after adjusting the front, rear, left and right positions, and a winch 19.
By operating 9, the tension of the guide rope 14 can be adjusted.

The guide beam 1 is suspended from the lower end of the hanging rope 6.
5 loosely inserts its tip into the guide rope 14 to regulate the position of the television camera 7 with respect to the guide rope 14, and by adjusting the tension of the guide rope 14, the television camera 7 is placed approximately in the center of the chimney 1. position it.

Incidentally, in the above embodiment, the television camera was controlled via the control cable 9, but
This cable is not necessarily necessary; instead, the TV camera is equipped with a radio receiver and a radio control device that operates the TV camera when received by the radio receiver, and the TV camera is operated by giving commands from the outside via a transmitter. You can also do that.

Further, the guide fitting 13 can be installed in any manner, but for example, a fixing fitting is fixed to the edge of the manhole with bolts, and the guide fitting 13 is fixed to the fixing fitting with bolts and nuts. This method is used.

A notch is still provided on the side of the annular portion at the tip of the guide fitting 13, so that when the guide beam 15 moves up and down and reaches a position where the guide fitting 13 and the guide beam 15 interfere, the guide rope 14 Once loosened, remove the guide rope from the annular portion at the tip of the guide fitting 13 through the notch, move the guide beam upward or downward, and then insert the guide rope through the annular portion at the tip of the guide fitting 13 again. be able to do so.

In addition, to attach the pulley 1T to the fixed base 18, for example, drill a plurality of bolt holes in the fixed base 18K in advance, select a bolt hole at a desired position from among the plural sets of bolt holes, and attach the pulley with bolts. This can be done by fixing or other methods.

As described above, the present invention suspends a guide beam on which a television camera is suspended in a sloping high-rise chimney using a hanging rope, and uses a manhole in the chimney to attach an arbitrary number of guide rope guide fittings. Install towards the inside of the chimney,
A guide rope fixed near the top of the chimney is passed through each of the plurality of guide fittings and suspended into the chimney, and the lower end of the guide rope is wound around a winch via a pulley fixed at the bottom of the chimney so that its position can be adjusted, Since the guide beam is loosely inserted into the guide rope, it is a simple rope mechanism that consists of a guide rope and a hanging rope, but it also allows the TV camera to be positioned approximately at the center of the chimney even on a sloped chimney. It is possible to perform desired inspection photography.

In other words, the guide rope is inserted through a plurality of guide rope guide fittings that protrude into the chimney using manholes, so the guide rope can be used even in chimneys that have sloped or curved parts. The television camera is suspended from a guide beam, and one end of the guide beam is loosely inserted into the guide rope.
The television camera 7 can be positioned approximately at the center of the chimney by adjusting the tension of the guide rope or, if this is insufficient, by adjusting the position of the pulley 17 of the guide rope adjusting device.

As described above, the present invention can regulate the position of the television camera by a rope mechanism mainly consisting of a guide rope and a hanging rope, so the device is relatively simple and inexpensive, and is particularly suitable for use on slopes or curves such as stacked chimneys. It is very useful as an inspection device for high-rise chimneys.

[Brief explanation of drawings]

Figure 1 is an explanatory sectional view of the inside of a high-rise chimney, Figure 2 is a schematic explanatory diagram showing the inspection device of the present invention installed in a high-rise chimney, and Figure 3 is an enlarged sectional view of a part of Figure 2. , FIG. 4 is an explanatory diagram of a part thereof. 1... High-rise chimney, 2... Chimney platform, 3... Beam, 4.4', 4"...
...Pulley, 5...Electric winch, 6...
... Hanging rope, 7... TV camera, 9.
...Camera control cable, 10...
...Control box, 11...Monitor TV, 12...VTR, 13...
Guide rope guide fitting, 14... Guide rope, 15... Guide beam, 16... Guide rope adjustment device, 17... Pulley, 18...
...Fixed stand, 19...Winch.

Claims (1)

[Claims] 1 Using the multiple manholes provided in the sloping high-rise chimney, install the required number of guide fittings facing the inside of the chimney, and attach the guide rope fixed near the top of the chimney to each guide fitting. The guide rope is inserted through the chimney and suspended into the chimney, and the lower end of the guide rope is wound around a winch via a pulley installed at the seat of the chimney so that its position can be adjusted, and the tension of the guide rope is adjusted by operating the winch. One end of the guide beam is loosely inserted into the guide rope, and a television camera is suspended from the other end of the guide beam, and the guide beam is suspended by the hanging rope so as to be able to rise and fall in the inclined high-rise chimney, and the television camera By guiding a suspended guide beam by the guide rope and adjusting the tension of the guide rope by the winch, the television camera is positioned approximately at the center of the chimney regardless of the inclination of the chimney. An internal inspection device for an inclined high-rise chimney, characterized by: