MX2007002693A - Second generation ground bar insulator (ep-2g-abt). - Google Patents

Abstract

The present invention refers to an improved insulator, fastener and fixing element useful for fixing ground system connection-bars to structures, which due to the exclusive design thereof may be installed even in difficult access areas, thus ensuring the functionality of the external insulated plane under equipotential bond conditions and in inner installations at a level protection of up to 15000 volts. The purpose of the present invention is to provide a type of insulator different from those currently available on the market, which due to the novel design and construction thereof the current bar installations are improved, a better protection is provided to the outer and inner parts, and installations theft and vandalism are reduced, the invention also being multifunctional.

Description

IMPROVEMENTS IN THE INSULATION OF THE GROUNDING BARS BACKGROUND OF THE INVENTION Currently land systems for telecommunications is undergoing a change mainly based on the price of copper that has been rising and has reached record historical prices, this fact has caused a strong vandalism by the metal.

In current land systems and specifically in the isolated plane of land, they have been using system composed of copper rods and cylindrical or hexagonal resin insulators as shown in Figure 1, Figure 2 and Figure 3.

These methods of isolation have a great weakness that is to be installed on the front, as it has a thread or nut embedded in the resin as shown in Figure 1. This arrangement facilitates robbery by having the screw exposed by the front of the bar as shown in Figure 2, as it is extremely easy to remove, and as a consequence of the bar and fixing accessories.

One of the aspects that this robbery has is that the pieces to be stolen or cut are integrated so that in many cases they are sold again and reinstalled again making them pass as new.

Another weakness that this type of insulator presents is that when it is placed strictly by the front part and has a cylindrical shape, it often collides with metal structures, shortening the space between the copper bar and the metal structures, which decreases the efficiency of the insulator by not exercising whole body insulation.

As a weakness of great importance is that barrel-shaped or cylindrical insulators when placed between the bar and the structure vertically, leaving the bar below the insulator, it presents a short circuit for the isolated plane, this basically by the continuous channel of water jet of rain.

At present the vandalism by the theft of the copper and the easy disposition of retirement that the insulator offers, demands to the electrical industry especially of land system an arrangement that offers better security before the robbery and that its function of insulator is designed for keep the plane isolated even in rain.

It should be noted that the vast majority of these insulators have an exceptional resistance to dielectric rupture, often reaching several tens of thousands of volts to break the dielectric, however this is not a necessity for earth systems, since as land systems must go to the same reference potential and the transient current is of minimum duration in its great majority in tenths of a second, its application must be oriented to preserve the isolated plane and avoid the short by continuous flow in rainy moments and not to an electrical application for high continuous currents.

DESCRIPTION OF THE INVENTION The characteristic details of this novel insulator EP-2G-ABT, are clearly shown in the following description and in the accompanying drawings, and following the same reference signs to indicate the parts and figures shown.

Figure 4 is a conventional isometric perspective of the insulator.

Figure 5 is a side perspective of the insulator.

Figure 6 is a top perspective view of the insulator.

Figure 7 is a posterior perspective of the insulator.

Figure 8 is an isometric perspective of the insulator with perforations in the back.

Figure 10 is a side perspective view of the insulator with upper perforations.

Figure 11 is a rear view of the insulator with upper perforations.

Figure 12 is an isometric perspective of the insulator pair structures.

Figure 13 is a perspective sectional view of the insulator for structures.

The material for the proposed insulator, body of the patent is basically resins or nylon, and its fixation must be with head head screws, the guard boxes for the heads of the screws have to provide a means to seal the access to the head of the thyme, so that once placed, these elements can not be dismantled.

The patent proposal as shown in figure 4 is a diagonal insulator with a height of 44.70 mm, a width of 27.60 mm and a length of 79 mm with lateral and frontal channels, which cut the flow of water between the fixing part and the opposite side that will be for the connection bar. In the upper part (No 1) of figure 4, it can be noted that this form can be rail to enter dovetail and thus have a lateral or vertical displacement in the connection bar, the box to house is also shown the head of thyme find (No. 2).

Figure 8 shows the same insulator arrangement but this time without the rail for the dovetail and in its place two perforations (No. 6) that will be used to fix this piece directly to the connection bar, as You can notice in the back of this piece, there are the two boxes to house the screws, figure 9 (No. 7) and once the screws are placed, these cavities (No. 7) must be sealed by resins or some epoxy polymer. prevent the removal of the screws.

Figure 4 shows the channels for water scum (No. 3) with a length of 57 mm and a height of 10 mm and depth of 4 mm and running on 3 sides of the perimeter of the piece, thereby it is avoided that it finds a continuous channel for water choro between the connection bar and the structure.

In figure 12 it is shown with dimensions of width of 21 mm, height of 57 mm and length of 85 mm the same arrangement of insulator, this time arranged in the upper part with the mentioned rail (No. 1) for dovetail and on the face opposite to this, there is a slot (No.8) by which said piece can be embedded in the edges of an angle or structure. You can also see in Figure 13 (No. 9) a hole in the deepest part is stamped (No. 10) and in the final part the box to house the head of the screw find (No. 1 1), this The arrangement has the function of securing the insulator to the structure as a pin and that as in all cases, the case for the screw head has been mentioned. Once installed, it must be sealed so that the screw can not be removed.

In this insulator is also the possibility of fixing by the front, where you have the box (No. 2) for the thyme found as shown in Figure 13 and Figure 14.

Given these design features, the insulator can be fixed to a structure with double protection, using the aforementioned slot to have the screw in the manner of a pin and the perforation arranged frontally to traverse the structure, in both cases sealing the boxes arranged for the screws and, if applicable, when the nut and wheel are exposed, they must be electrically welded to ensure their permanence.

The patent proposal is oriented to an insulator that can be placed in the back of the connection bar and does not have access to be removed once placed, in the same way its geometry must have ways to divert the flow of water as a result of the rain and so keep the plane isolated.

On the other hand said element once placed must be removed only under its destruction, and thus demonstrate its withdrawal by force not to be resold.

Due to its geometry, the direction of its placement must be impartial and it must offer the means to install itself easily on flat surfaces, such as walls as well as on metal structures that in the telecommunications industry are towers, monopoles, poles or ladders.

These parts will be subject to two main working conditions, electrical and mechanical stresses, for which the following tests were made: Electrical The insulator was installed with electrodes at its front and rear ends, simulating the connection bar to the front and the metal structure at the rear and 1000 volts were applied between them, without presenting electrical rupture.

A voltage of 5,000 volts was applied under the same arrangement and there was no electric arc.

A voltage of 16,000 volts was applied under the same arrangement and there was no electric arc. It is mentioned that in the tests carried out in a wet environment, the following was obtained: Voltage of 200 Volt.- There was no tonnage. Voltage of 800 Volts.- There was no tonnage. Voltage of 1500 Volts.- There was no tonnage.

It should be noted that said insulators for the insulated plane fulfill their function since the ground system must be formed by the equipotential bonding, therefore there will never be an attraction to the ground due to the fact that all the metallic elements will be placed on the same ground .

Mechanical The insulators were placed in the wall and in the structure, respectively, and weight was applied to the center of the connection bar, thus exerting the touch of greater intensity on the insulators, thus the results.

A concentrated weight was applied to the center of the wall bar and structure of 50 Kgs and there was no mechanical damage.

A concentrated weight was applied to the center of the bar in the wall and structure of 100 Kgs and there was no mechanical damage.

A concentrated weight was applied to the center of the bar in the wall and structure of 150 Kgs and there was no mechanical damage.

Therefore, it is concluded that said elements fulfill both electrically and mechanically for their function.

On the other hand, the following rain tests were carried out: The insulator was placed under a rain chamber and an electrode was placed at the end where the connection rod goes and another electrode on the back, in one of the electrodes there was a linear voltage source (alkaline battery) and in the other electrode a linear resistance (focus), thus subjecting the simulation of short circuit by continuous jet of water, simulating the rain and from this arrangement the following results were obtained: When it is placed vertically, that is, with the connection bar towards the front and the box for fixing the screw, they face upwards.- There is no continuity When it is placed vertically, that is, with the connection bar towards the front and the box for fixing the screw, look downwards.- There is no continuity To be placed laterally with the connection bar to the right and the box for fixing the screw to the rear. - There is no continuity To be placed laterally or with the connection bar to the left and the box for fixing the screw back. - There is no continuity.

The connection bar was placed under the insulator and the part for fixing to wall or structure upwards.- There is no continuity.

Therefore it is concluded that the artifact satisfies satisfactorily all the necessary tests.

Claims (3)

CLAIMS Having sufficiently described my invention, I consider as a novelty and therefore claim as my exclusive property, what is contained in the following clauses:

1. The artifact is an element designed to be multifunctional since the device operates as an insulator, fastener and as a fixing instrument in the installation of connection bars for ground systems, in addition to its configuration will eliminate deficient facilities.

2. Due to its design it can be installed even in small spaces with complicated access, always assuring its functionality of the isolated plane both externally under equipotential bonding conditions and in indoor installations (sheltered that are not exposed to rain) at a protection level of up to 15,000 volts

3. As an inventive matter, it is directly focused on the land system market and its main improvements to the market will be reducing theft or vandalism in the facilities and providing high performance fasteners, insulation and fastening elements. RESU IN THE INVENTION This invention relates to an insulator, fastener and improved fastening instrument, which acts by fixing to structures the connection rods for ground systems, which by its exclusive design can be installed in even in complex access spaces, always ensuring its functionality of the external insulated plane under equipotential bonding conditions and in indoor installations at a protection level of up to 15,000 volts. The object of this invention is to provide a type of isolator totally different from those currently on the market, since thanks to its novel design and construction, the current facilities of the bars are improved, there is better protection both in its external part as internal and will be reduced significantly theft or vandalism in the facilities without mentioning its multifunctionalism.