JPH0510504Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an aluminum pipe with a built-in damper, in which a damper is built into the aluminum pipe.

[Prior Art] Aluminum pipes are usually used as pipe bus bars and jumper wires for overhead power transmission lines used in power generation and substations.

Aluminum pipes used as pipe busbars, bayanper wires, etc., generate noise due to vibration and cause metal fatigue, so a damper is built into the aluminum pipe to prevent vibrations from occurring in the aluminum pipe. Sometimes, the rod fitting made of the steel rod of the damper is shaken, and the vibration energy is consumed due to elastic hysteresis loss of the rod fitting.
Efforts are being made to suppress vibrations.

In the conventional aluminum pipe with built-in damper, which has a damper built into the aluminum pipe, the steel rod fitting of the damper for preventing slight wind vibration is built into the aluminum pipe along its longitudinal direction. Both ends were supported by aluminum damper fittings built into the aluminum pipe, and each damper fitting was fixed to the aluminum pipe by plug welding. Plug welding was performed by drilling holes in aluminum pipes and using the holes.

For such aluminum pipes with a built-in damper, there are many questions such as whether or not there is a built-in damper, and whether the length of the rod fitting that determines the vibration characteristics is the appropriate length.
An inspection is performed to see if the rod fitting is located near the top of the aluminum pipe. These various inspections were performed using plug weld marks on aluminum pipes.

[Problem that the invention aims to solve] However, the plug weld marks are processed to fit as closely as possible to the pipe surface in order to improve the appearance of the pipe, so it requires skill and time to confirm their position, and this is a time-consuming problem. The dot was hot.

An object of the present invention is to provide an aluminum pipe with a built-in damper having a structure that allows easy inspection of the damper.

[Means for Solving the Problems] In order to achieve the above object, the present invention has a damper rod fitting built into an aluminum pipe along its longitudinal direction, and both ends of the rod fitting being built into the aluminum pipe. In an aluminum pipe with a built-in damper, the damper fittings are each supported by non-magnetic damper fittings, and each of the damper fittings is fixed to the aluminum pipe by plug welding, and a magnetic piece is attached to at least one of the damper fittings. It is characterized by

[Function] In such an aluminum pipe with a built-in damper, the damper can be easily inspected by detecting the magnetic piece with a magnetic sensor.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to FIGS. 1 and 2. As shown in the figure, in the aluminum pipe with a built-in damper of this embodiment, a steel rod fitting 3 of a damper 2 for preventing breeze vibration is built into the aluminum pipe 1 along its longitudinal direction. Both ends of the rod fitting 3 are pivotally supported and fixed by aluminum bolts 5 at positions near the upper part of a damper fitting 4 made of cast aluminum built into the aluminum pipe 1. When pivoting with the bolt 5, it is preferable to use a spring. The damper fitting 4 is a sleeve part 4
A pair of brackets 4B are installed in parallel inside A, and the tips of the rod fittings 3 are inserted into these brackets 4B, and are pivotally fixed by tightening aluminum bolts 5. For easy tightening of bolt 5,
A hole 4C is bored in the sleeve portion 4A. Each damper fitting 4 is fixed to the aluminum pipe 1 with a plug weld 6. On the upper surface of each damper fitting 4,
Magnetic pieces 7, such as iron pieces, are embedded and fixed in correspondence with the pivot points of the bolts 5, respectively.

Such aluminum pipes with a built-in damper may have a built-in damper 2 or not, and the length L of the rod fitting 3.
By detecting the magnetic piece 7 on the surface of the damper metal fitting 4 with a magnetic sensor, it is easy to check whether the damper metal fitting 4 is properly placed and whether the rod fitting 3 is placed along the upper surface of the aluminum pipe 1. As a magnetic sensor, for example, 30 mm from the outer surface of aluminum pipe 1.
Use a rod metal fitting 3 that is more than mm away from the rod and has a property that hardly reacts to the rod metal fitting 3.

Note that the magnetic piece 7 may be provided at any position on the damper fitting. Furthermore, the magnetic piece 7 may be provided on at least one of both damper fittings 4.

Furthermore, the damper fitting 4 may be made of any material other than magnetic material.

[Effects of the invention] As explained above, in the aluminum pipe with a built-in damper according to the invention, a magnetic piece is attached to a non-magnetic damper fitting, so the damper can be easily inspected by detecting this magnetic piece with a magnetic sensor. can be done.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of an embodiment of an aluminum pipe with a built-in damper according to the present invention, and FIG.
It is an A-line sectional view. 1... Aluminum pipe, 2... Damper, 3... Rod metal fittings, 4... Damper metal fittings, 5... Bolts, 6
...Plug welded part, 7...Magnetic piece.

Claims (1)

[Scope of utility model registration request] Damper rod fittings are built into the aluminum pipe along its longitudinal direction, both ends of the rod fittings are supported by non-magnetic damper fittings built into the aluminum pipe, and each damper fitting is attached to the aluminum pipe. An aluminum pipe with a built-in damper fixed by plug welding, characterized in that a magnetic piece is attached to at least one of the damper fittings.