WO2008108622A1

WO2008108622A1 - Earth conductor having an incorporated connecting part

Info

Publication number: WO2008108622A1
Application number: PCT/MX2007/000035
Authority: WO
Inventors: José Marco Salinas García
Original assignee: Salinas Garcia Jose Marco
Priority date: 2007-03-07
Filing date: 2007-03-09
Publication date: 2008-09-12
Also published as: MX2007002800A; ECSP099418A

Abstract

The invention relates to a flexible conductor having a connector at the end thereof. Said connector can be used to provide a secure, insulated contact between the cable and a duct using an intermediate part in which the ends to be joined are housed and in which both the electrical and the mechanical connections are made by means of soldering, set screws and sealing. The connecting part is covered with a heat seal strip which insulates the unit.

Description

Ground conductor with built-in connection piece BACKGROUND OF THE INVENTION

In current electrical applications for grounding, copper has been used as the best technical option, however due to the price increase that this material has suffered, there has been a worldwide phenomenon of theft or unauthorized theft thereof .

In many facilities where the land system plays a preponderant role, such is the case of telecommunications, where repeater stations are on hills or villages absent from surveillance, it is virtually impossible to prevent them from being subject to copper theft, that in the ground system they have both in a buried plane to form the ground electrode mass, as well as in the aerial installation plane, this is the one that is not buried and serves for multiple connections.

The use of insulated cable Figure 1 or bare Figure 2, depending on the need for installation, makes the use of copper today take a new slope, looking for new options that meet the requirements of electrical conduction and of not being attractive for Theft.

DESCRIPTION OF THE INVENTION

The characteristic details of this novelty, which I have called the Second Generation Jumper Ground Conductor, consist of flexible steel cable paths identified as J2G / A (open, with a connection box) or J2G / C (closed, with two boxes of connection) these correspond to steel cable connections to straight paths of galvanized thick-walled pipe of 0.5, 0.75 and 1.00 inches in diameter and for which I have called referring to the different diameters by calling J2G / C / 50, J2G / C / 75, J2G / C / 100 for closed paths in the corresponding diameters and J2G / A / 50, J2G / A / 75, J2G / A / 100 for open paths in the aforementioned diameters, and for better description purposes , is that attached drawings are duly referenced with numbers for their prompt location.

Figure 3 is an exploded perspective view of the connection of the cable to the tube.

Figure 4 is a perspective in symmetrical assembly of the cable connection to the tube.

Figure 5 is a perspective view of the front view of the cable connection to the tube.

Figure 6 is a perspective of the top view of the connection of the cable to the tube.

Figure 7 is a front symmetric perspective of the closed connection.

Figure 8 is a front symmetrical perspective of the open connection.

Figure 9 is a front symmetrical view of the cable-to-cable connection by means of an electric arc.

Figure 10 is an isometric of the connection arrangement of the J2G / A device. Figure 11 is a symmetric connection arrangement J2G / C. ,

With reference to these figures, the device is composed of a central connection body called a copy (No. 1), which connects the cable at the ends (No. 10) with the steel tube (No. 3), while in The lower part of the copy, there is a brake (No. 7) of sliding for the cable (stop), in the middle part of the copy there are two oppressors (No. 6). The copy is completely covered by the insulator (No. 2) which forms an insulating and protective jacket of the connection to the environment.

The construction of the invention can be seen in Figure 3, and it can be seen that the cable to tube pipe (No. 1) that coils in the lower and internal part (No. 4) is formed of the central part of the connection. to the thread of the galvanized thick wall tube (No. 3) (No. 5), connecting to the steel cable (No. 8) by clamping it by means of the hallen type oppressors (No. 6). In the connection, it must be ensured that the length of the steel cable (No. 8) is adequate to facilitate the straight path of the tube (No. 3), and once the above is checked and to guarantee the continuity of this connection, the copy (No. 1) is provided with a window (No. 12) to the tube (No. 3) through which it must be welded by electric arc, the same must be done between the copy (No. 1) and the steel cable where it enters (No. 14).

Once the connection has been made, the insulator (No. 2) must be run until it is left as a jacket or external plating of the copy, likewise the heat shrink sleeve (No. 13) must be heated to seal said joint against water. It is important to highlight the internal seal of insulator (No. 11) and that prevents water from draining the cable inside the copy.

The device has three sizes, for different galvanized steel tube diameters, where the smaller one is Vi inch, the intermediate one is ³ A and the larger one is 1 inch, and it must be clarified that the design, construction, number of parts and operation does not change, so that the selection criteria for its application will be based on the cross section in mm2 - A - that is required to drain the current, therefore its applications will be oriented towards this principle.

For the purposes of referencing the invention, I would like to mention the dimensions of the J2G / A / 75 connector for ³ A inch diameter pipe, so that the copy (No. 1) is a 32 mm diameter external cylindrical body, with a top hole (No. 14) for the 27mm steel cable. The length of the copy (No. 1) is 89mm, the internal diameter of the perforation to receive the galvanized steel tube is 24mm with a thread length of 40mm, the oppressors (6) with a head are 9mm in diameter with a length of 12mm and there is a separation between them to centers 27mm in length between them, the window (12) for welding is lm wide by 25mm long. The insulating box (2) is 38mm in diameter, with a length of 1 mm. The galvanized steel cable arranged for this arrangement is 5/8 in diameter, the cover (9) for closing the appliance when it is not installed is 45mm in diameter and 25mm long. The brake (7) for the cable that prevents it from coming out of the copy is 20mm in diameter.

The efficiency of the device lies in being a flexible device, isolated, easy and efficient connection, with particular design features that allow, on the one hand, the closed connection called J2G / C for having connection boxes on both ends of the cable, on the other part of the J2G / A open connection, understanding in this case that only one of the cable ends has a connection box, these two modes allow the device the versatility to connect tube to cable, tube to tube, thus having a fast and secure connection . Another advantage is that being flexible and isolated, it can be installed on oblique paths where pretending to work this same trajectory with a tube makes it a very slow, expensive and multi-connection process, which makes it electrically deficient at times of drain the current, however with this device only two properly secured connections will be guaranteed and continuity is guaranteed, fast and safe installation, even in complex paths, in times of electrical failure and obviously being an element that does not carry its propensity to Theft is much less. It should be noted that the device in its connection modalities (open and closed) Soldiers are at their ends, so once placed it will not be attractive for crime since there are two main factors. The galvanized steel tube, when welded to the copy in the connection box (No. 12) implies that for its removal it must be cut at its extremities, which ceases to be a complete element for resale or reinstallation.

Abundant in the previous, the device by its characteristics has the quality that when it is welded to the copy (14) and this same to the tube (12) can not be removed with the connection boxes, being the case that the simple cable section Steel is not an element of interest or attraction for theft, not to mention that to carry out the theft of these parts requires much more tool and time than for the current copper theft.

In this way it is obtained that galvanized steel, have defined values for electrical conduction and thermal shock, this information is concentrated in the Onderdonk equation and is highly used in the electrical industry as design parameters of parts intended to conduct electric current.

These values determine if a piece of metal is capable of conducting an indicated value of electric current in a set time. Therefore and based on the statistical data by CIGRE (International Conference of High Voltage Electrical Systems) France has defined values and failure times for atmospheric discharges or lightning. These ranges are what we have used to assess the conditions to which said drivers will be exposed, as in many cases they will be outdoors and therefore may be subject to a direct impact of lightning.

Said the previous we establish that:

In a 957th of lightning strikes we have a value of 15 kilo amps in a time of 0.000001 seconds, a cross section of 1 1.15 mm2 is required.

In 50% of the lightning impacts we have a value of 30 kilo amps in a time of 0.000075 seconds, a cross section of 35.27 mm2 is required. In 5% of the impacts of lightning we have a value of 80 kilo amps in a time of 0.0002 seconds, for the case of steel a cross section of 153.60 mm2 is required.

Therefore we can establish that for all the aforementioned cases the design of the galvanized steel conductor has and complies with the appropriate cross-section, without presenting damage to its electrical and mechanical structure.

Therefore we can establish that for all the aforementioned cases the design of the J2G / A / 50 has a cross-sectional area of 71.18 mm2 for the case of J2G / A / 75 it has a cross-sectional area of 197.93mm2, therefore for In all cases, the sections used in the devices exceed the stipulated area requirements.

For all that has been said above, it can be affirmed that there is no other similar device on the market, which brings together the characteristics of easy installation on the one hand and very complex in its disassembly on the other; Therefore, it is unattractive for theft, all of this complying with the cross-sections required to drain the electrical current to ground efficiently.

Claims

CLAIMS Having described my invention sufficiently, I consider it as a novelty and therefore as much as my exclusive property, the content of the following clauses:

1.- Second Generation Jumper ground conductor, which in its J2G / A and J2G / C modality, which is formed by a central connection piece, with a cable-to-tube copy that coils in the lower and internal part of the Thread of the galvanized thick-walled tube, connecting to the steel cable by means of the hallen-type oppressors. The copy on the other hand, is provided with a window to the tube, through which it must be welded by an electric arc, the same must be done between the copy and the steel cable through which it enters. Once the connection is made, the insulator must be run until it is left as a jacket or external plating of the copy, the heat shrink sleeve must also be heated to seal said joint against water. It is important to highlight the internal seal of the insulator, as this prevents water from draining from the cable inside the copy.

2.- Ground Jumper Second Generation, which in its modality of J2G / A and J2G / C, are characterized in that, as claimed in the previous clause, they ensure in two stages the connection, the first one, would be by thread in the tube to the copy, and prisoners of the copy to the cable, while the second would be through the electric arc welding to the window of the copy to the tube, and that of the copy and the steel cable where it enters.

3.- Ground Jumper Second Generation, which in its modality of J2G / A and J2G / C, are characterized in that, as claimed in the first clause, they provide an outer jacket or plating of the copy, which obviously constitutes one more quality of security by the artifact.