JPS6023863Y2 - Structure of the base of the steel tower - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to the structure of the base structure of an antenna tower.

Many steel towers used for antennas require insulation at their bases from the ground.

Large ground clearance, e.g. 200m to 450m in height
If the base of a steel tower is insulated from the ground, the vertical load can reach several hundred pounds, so it is difficult to safely support the load with just one insulator.

Moreover, the base structure of a steel tower is usually manufactured as a cast steel product, but its complicated shape makes it expensive to manufacture, and once completed, it is impossible to disassemble, and it is also heavy and bulky, making it difficult to transport to the site. .

The present invention was developed in view of the above circumstances, and the purpose of the present invention is to provide a light and heavy steel tower base frame structure that can be disassembled to allow the load of a heavy steel tower to be evenly shared by a plurality of stand insulators. Its features include a tower support with three or more leg girders removably protruding radially from the side of the cylindrical body on which the tower base is placed via the tower seat; , a plurality of sets of insulators are arranged in parallel on a base plate, and support the tips of the leg girders on a common central axis via an insulator combination tool, each of the leg girders is composed of a pair of thick plates with blocks sandwiched at their tips, and each of the blocks has a protruding width set to protrude toward the top surface of the insulator combination to adjust the height between the leg girders. The reason is that the bolt for use is threaded.

Hereinafter, the present invention will be described in detail with reference to illustrated embodiments.

FIGS. 1 and 2 are conceptual diagrams showing the base structure of a steel tower. In the figures, reference numeral 1 denotes a base plate made of a flat steel plate, which is fixed on a concrete foundation (not shown).

In the illustrated example, three base plates 1 are provided, and the base plates 1 are arranged so that the center of each base plate 1 is located at the apex of an equilateral triangle.

On each of these base plates 1, three sets of stand insulators 2 are arranged at the vertices of an equilateral triangle in the figure.

In the illustrated example, the stand insulator 2 is constructed by stacking, for example, four flat drum-shaped insulators 3.

A low conical metal cap 4 is placed on the top of each set of stand insulators 2, and a load is applied to the conical top of the cap 4 so that the load on the pressure receiving surface of the insulator 3 is uniform. .

5 is an insulator combination tool formed into a triangular pyramid shape, which is the same as 3 above.
It is placed on the stand insulator 2 of the set.

That is, the load applied to the insulator combination fitting 5 is evenly distributed and applied to the three sets of stand insulators 2.

Reference numeral 6 denotes a steel tower support body in which phase modifiers 8 are horizontally protruded on three sides around a cylindrical support tube 7, and this support body 6 has the tips of the phase modifiers 8 placed above the center of the insulator combination fitting 5. It is placed in the ground and insulated from the ground.

The above-mentioned phase adjustment member 8 is made up of two same-shaped phase adjustment member thick plates 9 whose surfaces are perpendicular to each other, and a metal block 10 which is held at the tip thereof has a screw hole 10a in the center of the metal block 10 which is connected to the insulator combination metal fitting. The adjustment bolt 11 protruding above the adjustment port 5 is screwed on, and the protrusion width of the adjustment port 11 is adjusted so that the load applied to the tip of each phase adjuster 8 is equalized.

Reference numeral 12 denotes a steel tower seat disposed on the cylindrical body 7 of the support body 6. As shown in FIG. concave bottom 1
3a is loosely fitted to place the base 13 of the steel tower.

As shown in FIG. 4, the support body 6 is assembled in such a way that the phase adjustment member 9 is removably attached to the support cylinder 7 via the metal block attachment bolts 15, and the metal black 10 is attached to the phase adjustment attachment bolts 14.
It is removably attached to the tip of the phase adjusting member 9 via.

According to the above-mentioned base structure of the steel tower, the base insulators 2 of the credit group are respectively arranged on a predetermined number of base plates 1, and the insulator combination fittings 5 are installed so that the load is evenly applied to these base insulators 2. Place the same number of base plates as 1.

The center of each insulator combination fitting 5 is arranged so as to coincide with the center of the adjustment bolt 11 attached to the tip of each phase adjuster 8.

This completely insulates the support 6 from the ground.

In this case, if the load of the support body 6 is not completely evenly distributed to each stand insulator 2, the protrusion width of the adjustment bolt 11 is adjusted.

That is, the load applied to the tower seat 12 is distributed in three directions via the support 6 in the case of the figure, and this distributed load is equally distributed to the plurality of stand insulators 2 via the insulator combination fittings 5.

Therefore, the load on the heavy steel tower can be distributed to the required number of sets of stand insulators, so that the load on each stand insulator 2 can be reduced.

The number of phase adjusters 8 may be four as shown in FIG. 5 or five as shown in FIG. 7.

Further, the shape of the cylinder 7 may be cylindrical as in this embodiment, or may be a regular polygonal cylinder as shown in FIG.

Furthermore, it is conceivable to fix the phase adjuster 8 to the supporting cylinder 7 by welding as shown in Fig. 6, but in this case it would be difficult to transport because it cannot be disassembled. As shown in Figure 8, part of the phase adjustment is preferably formed so that it can be attached and detached with a bolt in the middle.

As described above, according to the structure of the steel tower base frame of the present invention, the load of the steel tower can be equally distributed and supported by a plurality of stand insulators, and each part can be disassembled, so it is easy to manufacture. It can also be easily transported.

[Brief explanation of the drawing]

Fig. 1 is a perspective view conceptually showing an embodiment of the steel tower base frame structure of the present invention, Fig. 2 is a plan view of Fig. 1 with the tower seat removed, and Fig. 3 is the same as Fig. 1. FIG. 4 is a plan view showing the assembly structure of the support shown in FIG. 1, FIGS. FIG. 6, which is a plan view partially showing a part of the phase adjustment, is an explanatory diagram for explanation. 1...Foundation board, 2...Insulator, 3...
...Drum-shaped insulator, 4...Metal cap, 5
...Insulator combination metal fitting, 6 ... Steel tower support, 7 ... Support cylinder, 8 ... Curved phase, 9 ...
... Phase modifier thick plate, 10 ... Metal block,
11... Adjustment bolt, 12... Steel tower seat, 12a... Top of steel tower seat, 13...
... Steel tower base, 14 ... Phase adjustment mounting bolt, 1
5...Metal block mounting bolt.

Claims (1)

[Scope of utility model registration request] A tower support with three or more leg girders removably protruding radially from the side of a cylindrical body on which the tower base is placed via a tower seat, and multiple sets arranged in parallel on a flat foundation plate. and a stand insulator configured to support the tips of the leg girders on a common central axis via an insulator combination tool,
Each of the leg girders is constructed of a pair of thick plates having a block sandwiched between the tips thereof, and each of the blocks has a protrusion that projects toward the top surface of the insulator assembly in order to adjust the height between the leg girders. The structure of the steel tower base is characterized by a threaded adjustment bolt with a set width.