RU32327U1 - Universal junction box - Google Patents

Description

Universal junction box

The invention relates to communication technology.

Known sealed junction box for electrical cables, containing a base for the cable core and cable glands according to the number of cables, and the base is made of stacked sections individually fastened with studs, each of which has a U-shaped body, removable flanges for accommodating glands installed on the side walls of the casing and the bar located in the wide part of the casing for fixing the connecting cores (see AS USSR No. 607303, class N 02 G 3/08, 1978)

The disadvantage of this device is the inability to combine the functions of a switching switchgear with a simultaneous increase in the number of subscribers, which means universality.

Known is a switching box containing a metal case, with a plinth inside, which has mortise openable contacts with connected jumper wires, and a terminal block, a board with a socket for connecting measuring devices are additionally placed in the case, and the case rests on its base on a hollow rack equipped with ventilation holes, while fixing the cables in the housing is carried out by means of a clamping plate, and inside the hollow rack with a polymer plug (see certificate on Utility model JY2 21699, class H02G 3/08, 2002, prototype).

However, this device does not have universality due to the impossibility of combining the functions of a switching switchgear with a simultaneous increase in the number of subscribers.

2003108632

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2003106632

MKI H02G 3/08

switching switchgear with a simultaneous increase in the number of subscribers achieved through the use of digital compression equipment subscriber lines of the public telephone network with the same capacity of the supply cable, or if necessary, to minimize the capacity of newly laid lines.

The technical problem is solved by the fact that the universal junction box contains a metal case with switchboards placed inside, a circuit board with a grounding socket and connecting measuring instruments, a pressure bar, a hollow rack equipped with ventilation holes and a polymer plug, and the metal case has a metal jacket inside the housings contain blocks of digital sealing equipment; there is an air gap between the outer surface of the housing and the inner surface of the shirt; the device is equipped with ventilation slots and has a bolted connection between the housing and the construction site, a gasket with low thermal conductivity is provided in the lower part of the housing, and the rack is made openable through a hatch, and inside the rack there are coupling connections of communication cables.

Comparison with known devices shows that the use of digital equipment for sealing subscriber lines allows you to increase the mounted linear capacity of distribution networks with a constant capacity of the supply cable, while facilitating the thermal regime eliminating the possibility of condensation of water on the switching elements, which ultimately leads to an increase in the electrical characteristics of cable lines, increases the service life of equipment and switching elements.

The presence of ventilation and drainage holes in the hollow rack and ventilation slots in the upper part of the housing, an air gap between the external and internal housings of the working space allows you to create an aeration flow of air according to the type of built-in air conditioning, which

allows you to reduce the temperature at which the operation of the switching elements and, most importantly, electronic equipment (digital compaction equipment).

Reducing the temperature difference between the air in the enclosed space of the housing and the temperature of the working surfaces prevents the dew point from being reached and allows high electrical characteristics of the switching elements to be achieved.

The presence of a bolt flange allows the installation to change the position of the housing relative to the rack, depending on the orientation of the sun in this place, which also helps to reduce the temperature inside the housing.

A gasket with low thermal conductivity, located between the housing and the hollow rack reduces the heating of the working area due to heat transfer from the rack to the box.

A minimum of moving parts connected by flexible conductors, an all-metal body, allows you to create an equipotential surface that reliably protects the working elements from external electromagnetic influences.

The air vents of the rack also reduce the effect of the temperature of the rack itself on the temperature of the internal surface of the chassis, which meets the criterion of “novelty.

In FIG. 1 shows a General view of the device.

Figure 2 - device with the front cover removed.

The device consists of a metal casing 1, a metal shack 2. Between the casing 1 and the jacket 2 there is an air gap. Housing 1 contains blocks of equipment for digital sealing of subscriber lines 3, switching plinths 4, board 5 with a socket for grounding and turning on measuring devices, clamping plate 6, bolt connection 7.

in the lower part of the housing 1 there is a zero rack 9 having a hatch 10, ventilation and drainage holes 11, an earth bolt 12. Inside the zero rack 9 there is a polymer groove 13. The housing 1 has a cover 14, and in its lower part a gasket 15 having low thermal conductivity .

The device operates as follows.

Cables of subscriber and distribution lines from the telephone conduit enter the hollow rack 9 and are connected via cable couplings 16 to the counterpart of the cable exiting the housing 1.

The cables included in the housing 1 are fixed by means of the clamping plate 6, and in the lower, coupling part are sealed with a polymer plug 13. The distribution cable as an end element in the housing 1 has one of the plinths 4. Subscriber lines are included in both plinths 4 depending on the configuration , while in the skirtings, which are the terminal element of distribution cables, subscriber line cables formed on the physical medium are included. The subscriber lines formed on a mixed basis are included in a separate base, the subscriber lines obtained on the basis of the sealing of one or more physical circuits of the distribution cable in digital sealing equipment 3 are cross-linked here.

The distribution cable enters the housing 1 and ends with plinth 4. One of the circuits through which the encoded signal is received from the telephone exchange is crossed with the subscriber part of the sealing equipment 3 located in the housing 1. Then, after demodulation of the pulse-encoded signal, the newly formed subscriber lines ( the quantity is determined by the type of equipment), 4 subscriber lines are crossed onto the baseboard. Subscriber lines coming from subscriber terminals via subscriber cables are also connected here. Remaining physical (not sealed) distribution cable circuits.

by means of plinth 4 they are connected directly to subscriber cables. A bunch of subscriber cables through a hollow rack, is displayed in the telephone conduit and then to the subscriber units.

Thus, when connecting 10 circuits as a distribution cable and crossing one of them onto the compaction equipment (into eight channels), eight subscriber lines are crossed on the upper plinth. From the lower base, 9 remaining subscriber lines formed by physical circuits are allocated. The total number of subscriber lines when using a configuration using the specified equipment is 17.

Authors: v. jg g Grebenyuk

E.G. Geek

Claims (1)

A universal junction box containing a metal case with switchboards placed inside, a circuit board with a grounding socket and measuring instruments, a pressure strip, a hollow rack equipped with ventilation holes and a polymer plug, characterized in that the metal case has a metal jacket, and the equipment blocks are located inside the case digital seal, between the outer surface of the case and the inner surface of the shirt there is an air gap, and the device is equipped with a vent with ionic slots and has a bolted connection between the housing and the rack; in the lower part of the housing, a gasket with low thermal conductivity is provided, and the rack is made openable by means of a hatch;