JPS59439Y2 - Steel tower nest prevention cover - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a nest-proof cover used in a steel tower.

In steel towers for power transmission lines, etc., pipes are used as horizontal or diagonal members, but birds such as sparrows nest in the openings at the ends of these pipes, causing corrosion of the members and staining of the insulators due to bird excrement, etc. is a problem.

For this reason, it has been proposed to close the end of the pipe by welding or adhering a cover.

By the way, the so-called vertical edge welded pipe, in which a flat steel plate is formed into a sheath shape and the vertical seams are welded, is often used as the above-mentioned pipe member of a steel tower.

In addition, it is necessary to install a joint member for suspending the insulator at the end of the above-mentioned pipe member of the transmission line tower. As shown in BB sectional view), a notch is provided at the end of the pipe, a joint 2' is fitted into the notch, and the joint 2' and pipe P' are welded 3'.

However, when the pipe is the vertical edge welded pipe described above, the welding heat between the joint and the pipe causes processing distortion during forming the vertical edge welded pipe into a sheath shape, resulting in the distortion shown in Figure 1B. As shown, deformation of the cross-sectional shape of the pipe end cannot be avoided.

If there is such deformation at the pipe end, it is difficult or impossible to stably fix it to the pipe end with the above-mentioned conventional pipe end blocking cover, and the deformed pipe end must be corrected. Installation is difficult.

Even if it is possible to attach the cover to the end of the pipe, it is inevitable that the cover will be unstable, and there is a concern that the cover may come off unexpectedly due to strong wind pressure at the top of the tower.

The steel tower nest prevention cover according to the present invention was devised to eliminate the above-mentioned disadvantages, and includes a substantially semicircular plate portion that is applied to the opening at the end of the pipe arm member of the steel tower, and a It has a substantially semicircular belt-shaped frame edge applied to the outer surface of the frame edge, and an elastic sheet having an adhesive layer on both sides is adhered to the inner surface of the frame edge.

The present invention will be explained below with reference to the drawings.

FIG. 2 shows a nest-proofing cover according to the present invention.

In FIG. 2, reference numeral 1 denotes a cover main body, which includes a substantially semicircular plate portion 11 and a circular arc shape along the semicircular periphery of the plate portion 11 (the arc angle is slightly smaller than 180° or less, approximately semicircular). It is composed of a band-shaped frame edge 12 (referred to as circular).

For the cover body 1, a molded product such as a steel plate, a stainless steel plate, a hard plastic plate, etc. can be used, and other hard materials can also be used as long as they have the desired strength and corrosion resistance. .

Usually 0.3 to 1. A molded product of stainless steel plate with a thickness of Qmm is used.

2 is an elastic sheet adhered to the inner surface of the strip frame edge 12;
An adhesive layer is provided on the surface.

This surface-adhesive elastic sheet has a thickness of 0.5 to 1Q mm,
Preferably 0.5-5. An elastic sheet of Qmm thickness, for example, a sheet made of synthetic rubber, synthetic resin elastic material (e.g., plastic foam), nonwoven fabric, felt, layered leather, etc., with adhesive layers on both sides, is used as the frame edge. It can be provided by adhering to the inner surface.

FIG. 3A shows a front view of the anti-fog cover according to the present invention in use, and FIG. 3B shows a cross-sectional view.

In FIGS. 3A and 3B, P indicates the pipe arm member of the steel tower, A the joint welded to the arm member, B and B indicate the rustproof cover according to the present invention, and the end of the pipe arm member is Approximately semicircular plate portion 11.1 of cover B, B
1, and approximately semicircular band-shaped frame edges 12, 12 of the covers B, B are adhered to the outer peripheral surfaces of the ends of the members by adhesive surfaces of elastic sheets 2, 2.

In the above, even if there is distortion in the cross-sectional shape of the end of the pipe arm member, due to the elastic deformation of the elastic sheet 2, the cover B
The band-shaped frame edge 12 and the outer periphery of the end of the arm member can be closely attached, and a stable adhesive state can be ensured.

Furthermore, even if stress is generated at the adhesive interface of the elastic sheet 2 due to wind pressure vibration of the power transmission line transmitted to the pipe arm member or intermittent wind pressure acting on the approximately semicircular plate portion of the cover, this stress will not be applied to the elastic sheet 2. The band-shaped frame edge 1 of the cover B is well-relaxed due to its elasticity, and is therefore well resistant to the above-mentioned vibrations and wind pressure.
The adhesion state of No. 2 can be stably maintained.

4A and 4B are front views of another embodiment of the cover of the present invention. In order to reduce the wind pressure area of the approximately semicircular plate portion 11, the plate portion is designed to prevent birds from entering. Holes 110° 110... or notches 111, 111 are provided to a degree that does not allow.

Except for this point, the configuration is the same as the embodiment shown in FIGS. 3A and 3B.

As mentioned above, the steel tower nestproof cover according to the present invention is provided with an elastic sheet on the inner surface of the frame edge that is adhesively fixed to the pipe arm member of the steel tower, and an adhesive layer is provided on the surface of the elastic sheet. Even if the cross-sectional shape of the end of the pipe arm member is distorted and there is some misalignment between the cross-sectional shape and the frame edge, the misalignment can be absorbed by the deformation of the elastic sheet, and this elastic sheet exists. It is possible to sufficiently prevent the generation of tensile surface pressure that would otherwise act on the adhesive layer.

Although the adhesive layer has a weak tensile stress acting on the adhesive surface (it is strong against shearing), according to the present invention, the disadvantages of the adhesive layer can be avoided and the anti-fouling cover can be adhesively fixed to the steel tower.

Furthermore, since the elastic sheet absorbs vibrations transmitted through the steel tower well, the above-mentioned adhesively fixed state can be stably maintained even against such vibrations.

Therefore, even when working on a steel tower with unstable footing, the anti-fog cover can be easily fixed with adhesive.

[Brief explanation of the drawing]

Figure 1A is a side view showing the pipe arm member of the steel tower;
Figure B is a sectional view taken along line B-B in Figure 1A, Figure 2 is a perspective view showing the cover according to the present invention, Figures 3A and 3B are front views and cross-sectional views showing the cover of the present invention in use. side view,
FIGS. 4A and 4B are front views showing other embodiments of the present invention. In the figure, 11 is a substantially semicircular plate portion, 12 is a substantially semicircular strip frame edge, and 2 is an adhesive layer.

Claims (1)

[Scope of utility model registration request] It has a semicircular plate part applied to the opening at the end of the pipe arm member of the steel tower, and an arc-shaped band frame edge applied to the outer surface of the end of the member, and an adhesive is applied on both sides to the inner surface of the frame edge. A nest-proof cover for a steel tower characterized by pasting an elastic sheet with layers.