JP2004359149A - Bogie device - Google Patents

Abstract

An object of the present invention is to reduce the size and weight of a bogie device for inspecting a steel exhaust tower inner wall surface during operation.
A bogie device (1) lifted and lowered by a wire rope (4) wound and fed by a winch, the bogie device (1) being pressed against an inner wall surface of an exhaust tower by an air flow (15) flowing at a high speed from below to above. A bogie main body 5 having a shape to generate a lifting force, a magnet 7 for adsorbing the bogie main body 5 to the inner wall surface of the exhaust tower, and a wheel unit 6 of an omnidirectional wheel type are provided.
[Selection] Figure 2

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a bogie device.
[0002]
[Prior art]
When inspecting the inner wall of the exhaust tower made of steel during operation, the bogie device equipped with the inspection device is adsorbed and supported on the inner wall surface of the exhaust tower via wheels made of magnets, and the bogie device is allowed to travel by itself. It is conceivable to raise and lower the inner wall surface of the exhaust tower. Thus, there is, for example, Patent Document 1 as a bogie device provided with wheels made of magnets.
[0003]
[Patent Document 1]
JP-A-2002-87342
[Problems to be solved by the invention]
Since the bogie device disclosed in Patent Document 1 is attracted and supported on the inner wall surface only by magnet wheels, the attraction force of the magnet needs to be sufficiently high, and thus the device becomes large and the device weight increases. . Further, when the bogie device disclosed in Patent Document 1 is used in an operating exhaust tower, the bogie device is separated from the wall surface by a high-speed airflow flowing from below to above in the exhaust tower. Since a force is generated, this force must also be supported by the magnetic force of the wheel. As a result, the wheel requires a larger attraction force, and the bogie device becomes larger and heavier.
[0005]
The present invention has been made in view of the above circumstances, and has as its object to reduce the size and weight of a bogie device for inspecting the inner wall surface of a steel exhaust tower during operation.
[0006]
[Means for Solving the Problems]
The bogie device according to claim 1 is a bogie device that is lifted and lowered by a cord-like body that is wound and fed by a hoisting / lowering means, wherein the bogie device is installed in a tower by a lift generated by an air flow that flows upward from below. It has a bogie main body shaped to be pressed against the wall surface side, and a wheel unit for guiding the bogie main body up and down and / or right and left movement.
[0007]
According to a second aspect of the present invention, the bogie device includes a magnet for adsorbing the bogie main body to the inner wall surface of the tower. In the bogie device according to the third aspect, the wheel unit is made of a magnet.
[0008]
In the bogie device according to the fourth aspect, the side of the bogie main body separated from the inner wall surface of the bogie is inclined downward in the direction approaching the inner wall surface of the tower.
[0009]
In the bogie device according to claim 5, the wheel unit includes a bracket rotatable by the driving device, and a plurality of rotatable barrel-shaped wheels pivotally supported by the bracket and arranged in the rotation direction of the bracket. When the bracket is not driven to rotate, the bogie body is configured to be able to guide the bogie body ascending and descending by rotating barrel-shaped wheels, and to move in the left-right direction when the bracket is driven to rotate. Is configured to be able to be guided.
[0010]
According to the present invention, an airflow flows from below to above in the tower, and the bogie main body has an aerodynamic effect. Therefore, a lift acts on the device in addition to the magnetic attraction. . Therefore, the magnet only needs to have a minimum attracting force for stably supporting the bogie device on the inner wall surface of the tower, and a small and lightweight magnet may be used. As a result, the size and weight of the entire bogie device can be reduced, and the ground pressure is lower than that of a bogie device as shown in a device in which the entire weight is supported by magnet wheels. The wheels do not damage the coating on the inner wall of the tower.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
1 to 4 show an example of an embodiment of the present invention. In the drawings, reference numeral 1 denotes an inside of the exhaust tower 2 by winding and unwinding a wire rope 4 by a winch 3 installed on the upper part of the exhaust tower 2. This is a bogie device that can move up and down along the wall. The bogie device 1 includes a bogie main body 5 on which an inspection device (not shown) is mounted, a wheel unit 6, and a magnet 7.
[0012]
In the bogie main body 5, the side protruding toward the center of the exhaust tower 2, which is separated from the inner wall surface of the exhaust tower 2, has resistance to a high-speed airflow that rises at high speed from below in the exhaust tower 2. In order to reduce the number, the side shape is formed substantially streamlined downward. That is, the side of the bogie main body 5 facing the inner wall of the exhaust tower 2 is vertical, and the side opposite to the inner wall surface of the exhaust tower 2 is gently inclined downward from the top to approach the inner wall surface of the exhaust tower 2. From the top, it is inclined at a steep angle toward the upper part of the exhaust tower 2 so as to approach the inner wall surface of the exhaust tower 2.
[0013]
The wheel unit 6 is a so-called omnidirectional wheel. On the side close to the inner wall surface of the exhaust tower 2 of the bogie main body 5, there are two pairs of left and right parts on the upper side, one central part on the lower side, two pairs per part, a total of six pairs. Is provided. As shown in FIG. 4, the wheel unit 6 is fixed to a boss 9 having a shaft hole 8 at intervals of 120 degrees and has a bifurcated tip and a shaft between adjacent brackets 10. And a radius R from the center O of the shaft hole 8 to the outer peripheral side of the barrel-shaped wheel 12 is the same as the radius of barrel curvature of the barrel-shaped wheel 12. Is formed.
[0014]
As shown in FIGS. 2 and 3, a drive shaft 13 extending in the vertical direction is attached to a bearing (not shown) attached to the bogie main body 5, and the drive shaft 13 is provided with a wheel through a shaft hole 8. The unit 6 is fitted outside. The drive shaft 13 is driven by a motor 14. Thus, when the bogie device 1 is moved up and down by winding and unwinding the wire rope 4, each of the barrel-shaped wheels 12 can rotate via the shaft 11, and moves in the horizontal direction. In this case, the wheel unit 6 can be integrally rotated in a direction indicated by an arrow A in FIG.
[0015]
The magnet 7 is located near each wheel unit 6 on the vertical surface side of the bogie main body 5, and is disposed so as to have a predetermined interval with respect to the inner wall surface of the exhaust tower 2.
[0016]
The pressing force N of the bogie device 1 against the inner wall surface of the exhaust tower 2 is F = L + L, where F is the attraction force of the magnet 7 and L is the lift force of the air flow 15 flowing from the lower part to the upper part of the exhaust tower 2 at high speed. And the lift L is represented by [Equation 1]. In Equation 1, ρ is the air density, U is the flow velocity, _CL is the lift coefficient, and c is the bogie main body length.
(Equation 1)
L = ρU ² C _L c / 2
[0017]
Next, the operation of the above embodiment will be described.
When inspecting the inner wall surface of the exhaust tower 2 using the bogie device 1 of the illustrated example, the bogie device 1 hung on the wire rope 4 was put into the exhaust tower 2, and was adsorbed on the inner wall surface of the exhaust tower 2 by the magnet 7. Inspect the condition. The bogie device 1 is moved up and down by winding the wire rope 4 by the winch 3 and feeding it out. At this time, in each wheel unit 6, each barrel-shaped wheel 12 rotates by friction with the inner wall surface of the exhaust tower 2.
[0018]
When the carriage device 1 is moved in the horizontal direction, the motor 14 is driven to drive the drive shaft 13. For this reason, each wheel unit 6 rotates in the horizontal direction, and the bogie device 1 moves on the inner wall surface of the exhaust tower 2 in the horizontal direction.
[0019]
When the inspection of the predetermined range is completed, the winch 3 is moved in the circumferential direction along the upper edge of the exhaust tower 2 by a predetermined amount, and the bogie device 1 is moved in the circumferential direction on the inner wall surface of the exhaust tower 2 by a predetermined amount. Again, the inner wall surface of the exhaust tower 2 is inspected in the same manner as described above.
[0020]
In the illustrated example, the airflow 15 flows from the lower part to the upper part in the exhaust tower 2 at high speed, and the bogie body 5 has an aerodynamic effect due to its shape. For this reason, a lift L acts on the bogie device 1 in addition to the attraction F by the magnet 7. Therefore, the magnet 7 only needs to have the minimum attracting force F for stably supporting the bogie device 1 on the inner wall surface of the exhaust tower 2, and may be a small and lightweight magnet. As a result, the size and weight of the entire bogie device 1 can be reduced.
[0021]
In addition, since the ground pressure is lower than that of the bogie device shown in Patent Document 1 in which the entire weight is supported by magnet wheels, the barrel-shaped wheels 12 do not damage the coating on the inner wall surface of the exhaust tower 2.
[0022]
In the embodiment of the present invention, the case where the bogie device is applied to the exhaust tower has been described. However, the present invention can be applied to any tower other than the exhaust tower as long as the airflow flows upward from below. Can be implemented even if the wheel is made of a magnet, the winch can also be implemented so that it can run in the circumferential direction of the exhaust tower, and if sufficient adsorption force can be obtained only by lift due to the aerodynamic effect, the magnet is not necessarily It is needless to say that various changes can be made without departing from the scope of the present invention.
[0023]
【The invention's effect】
As described above, according to the bogie device according to claims 1 to 5 of the present invention, various excellent effects as described below can be obtained.
I) An air flow is flowing upward from below in the tower, and an aerodynamic effect is generated in the bogie main body. For this reason, in addition to magnetic attraction, lift acts on the device.
II) Therefore, the magnet only needs to have a minimum attracting force for stably supporting the bogie device on the inner wall surface of the tower, and may be a small and lightweight magnet.
III) As a result, the size and weight of the entire bogie device can be reduced, and the ground pressure is lower than that of a bogie device as shown in a device in which the entire weight is supported by magnet wheels. The barrel-shaped wheels do not damage the coating on the inner wall of the tower.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state in which a bogie device of the present invention is installed on an inner wall surface of an exhaust tower to perform an inspection.
FIG. 2 is a schematic longitudinal sectional side view showing an example of an embodiment of the bogie device of the present invention.
FIG. 3 is a view in the direction of arrows III-III in FIG. 2;
FIG. 4 is a front view of a wheel unit applied to the bogie device of the present invention.
[Explanation of symbols]
1 bogie device 2 exhaust tower (tower)
3 winches (means for hoisting and lowering)
4 wire rope (string body)
5 Bogie body 6 Wheel unit 7 Magnet 10 Bracket 12 Barrel-shaped wheel 14 Motor (drive device)
15 Air flow L Lift

Claims (5)

A bogie device that is lifted and lowered by a cord-like body that is wound and fed by a hoisting / lowering means, wherein the bogie device is configured to be pressed against the inner wall surface of the tower by a lift generated by an airflow flowing from below to above. A bogie device comprising: a bogie main body having a shape; and a wheel unit that guides up / down and / or left / right movement of the bogie main body. The bogie device according to claim 1, further comprising a magnet for attracting the bogie main body to the inner wall surface of the tower. The bogie device according to claim 1 or 2, wherein the wheel unit is made of a magnet. 4. The bogie device according to claim 1, wherein a side of the bogie main body separated from the inner wall surface of the bogie is inclined downward toward the inner wall surface of the bogie. The wheel unit includes a bracket that can be rotated by a driving device, and a plurality of rotatable barrel-shaped wheels pivotally supported by the bracket and arranged in the rotation direction of the bracket, wherein the bracket is not driven to rotate. Wherein the barrel-shaped wheel is configured to be able to guide a bogie body that moves up and down by rotating, and the bracket is configured to be able to guide a bogie body that moves in the left-right direction by being rotationally driven. The bogie device according to 1, 2, 3, or 4.

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