RU225803U1 - Shaped section for connecting three straight sections of cable duct at right angles - Google Patents

Abstract

The utility model relates to electrical engineering. The technical result is to increase the resistance of the spatial shape to deformations caused by laid wires. For this purpose, the shaped section for connecting three straight sections of the cable duct at right angles is made in a T-shape in plan with three openings for the straight sections of the cable duct, two of which are located opposite each other and open in different directions, and the third is located transverse to the first two. The section contains a base having a straight side wall along the lower edge and arc-shaped side walls in the corner areas above it, a T-shaped cover having a side wall along the bottom edge and arc-shaped side walls in the corner areas above it. The cover is placed on top of the base with its side wall located outside the straight side wall of the base and arc-shaped side walls outside the arc-shaped side walls at the base to form three openings for straight sections of the cable duct. On the base along the side straight wall there is a flat partition in the form of a plate to form an insulated channel compartment for placing wires, as well as arc-shaped flat partitions in the form of curved plates, which are placed inside the cavity of the base opposite the arc-shaped side walls and at a distance from them to form insulated duct compartments for housing wires, organized between arc-shaped flat partitions and side walls of the arc-shaped partition and between arc-shaped flat partitions and a flat plate partition. The height of the partitions is greater than the height of the side walls of the base and is equal to the depth of the lid, in which there is a recess along its flat straight wall for inserting the free edge of a flat partition in the form of a plate on the base, and an arc-shaped recess for inserting the free edges of the arc-shaped flat partitions into them grounds. 4 salary f-ly, 6 ill.

Description

The utility model relates to electrical engineering and can be used as a product for laying cables and/or wires for various purposes in the open air, inside buildings and structures of energy and general industrial facilities to connect straight sections of a horizontal or vertical cable route when changing its direction at an angle of 90° in three directions.

In particular, the utility model relates to cable duct systems for electrical installations and concerns the design of a T-shaped shaped section in plan for connecting at right angles three straight sections of a cable duct.

Known cable ducts for electrical installations consist of a base and a cover. These boxes can be of the locking type, in which there are latches on the shelves of the lid and base, allowing them to form a locking connection with each other (RU 2231883, H02G 3/04, published on June 27, 2004), and of the lockless type, in which the lid is fixed on foundation with the help of additional products (“Electrical equipment, busbar ducts, electrical installation products, tools and mechanisms”, Directory, 5th edition, revised and expanded, M, “Information Research and Production Agency”, 2005, pp. 254-256). As an example, a straight lock-type box for laying wires and cables is known (RU 42134). It consists of a base and a lid, which has flattened elements on the shelves formed by edges that are bent in the opposite direction inside the cross section of the lid.

The cavity of such a box is used for laying wires (for power and/or low-current systems). According to the design of the core and insulating sheath, the wires differ in rigidity and bending along their length, and when laid in a box, the straight sections do not lie exactly linearly, but are in a bent state along their length. To give such wires linearity and the possibility of separating them into groups in a U-shaped box, longitudinal partitions are made that divide the cavity of the box into compartments: one central and one on the sides of the box. Partitions not only allow wires that differ in currents to be laid out, but also give rigidity to the box to reduce its deformation and maintain its spatial shape. Such a box is protected by RU 217449. This patent provides a detailed description of it in terms of design and functionality.

When installing sections of such a box, situations arise when the wires are redirected. For example, some of the wires depart from the main wires in a perpendicular (transverse) direction and are also laid in sections of another straight box. The junction of three straight boxes, one of which is located transversely to the other two boxes, is closed by a T-shaped outlet - a shaped section with three entrance openings for boxes/sections.

A known shaped section is T-shaped in plan for connecting at right angles three straight sections of a cable duct, made of thin-walled polymer material and containing

A T-shaped base with oblong-shaped holes, to be fixed on a supporting surface (for example, on a wall), having a straight side wall along the lower edge and in the corner areas above it arc-shaped side walls, forming two open cutouts placed opposite each other between the side straight wall and arc-shaped walls and one open cutout between the arc-shaped walls, the location of which is perpendicular to the first two cutouts,

- a T-shaped cover, which repeats the design of the base in terms of the location and design of the side walls and the formation of cutouts, and in the arc-shaped walls of which there are protrusions for engagement with mating elements on the same walls of the base,

in this case, the cover is placed on top of the base to form three openings used to insert straight sections of the cable duct into them, two of which are located opposite each other, and the third is located transversely to these two openings (see “Panduit TGTAW T G T-shaped outlet ( TR)", posted in the mode of offer for sale on the Internet at the address: www.tovarpost.ra/web/tovarpost.asp?action=tovpod&elem=3548401) (discovered in February 2023) (a copy of the site page is attached).

This solution was adopted as a prototype.

The known solution is made of thin-walled polymer material and therefore easily changes its shape under the influence of bending moments. This is due to the fact that the side walls do not have connecting links between themselves and are not reinforced with stiffeners. At the same time, the design of the shaped section does not have internal partitions and does not separate the wires of power and low-current systems. In the area of bends and branches, the wires overlap each other due to different stiffness and different bend radii.

It is known that when current flows through power wires, a field of electromagnetic origin arises around the insulation, which forms a parasitic effect on neighboring wires. When exposed to the wires of low-current systems, this parasitic effect can provoke a change in the voltage on the wire, which will be considered by the low-current system as a new voltage (see D.V. Roomny “Inducing interference in the interconnections of electronic equipment of railway automation by electromagnetic field pulses” Belarusian State University of Transport, g. “Survivability, reliability, safety of transport”, p. 335, published 03/29/2017). To eliminate this drawback, dividing partitions are used in the T-shaped outlet, which not only prevent the contact of wires of systems of different voltages, but also eliminate the accumulation of wires at the branching point, which puts pressure on the walls of the outlet and on the cover. Thin-walled box-tray-type products, closed with a lid, ensure that the lid is retained by not changing its spatial configuration. When pressure is applied to a thin wall, it is deformed and at the same time the plane contact of the base wall and the lid wall is lost, on which the operation of elastic clamps - elastic bending legs - depends. These paws simply do not fit into the reciprocal recesses.

In this regard, it is necessary to solve the problem of strengthening the ability of the T-shaped shaped section to maintain its spatial configuration, eliminate force on the walls and use wall reinforcement elements, which can be internal partitions dividing the outlet cavity into channel compartments.

This utility model is aimed at achieving a technical result in increasing the resistance of the spatial shape to deformations caused by laid wires.

The specified technical result is achieved by the fact that in the shaped section for connecting at right angles three straight sections of the cable duct, made of thin-walled polymer material and T-shaped in plan with three openings for straight sections of the cable duct, two of which are located opposite each other and are open in different directions, and the third is located transversely to the first two, containing a base with a flat bottom with oblong-shaped holes used for fastening on the supporting surface, having a straight side wall along the lower edge and in the corner areas above it arc-shaped side walls, forming two placed opposite each other open cutouts between the side straight wall and the arcuate walls and one open cutout between the arcuate walls, a T-shaped cover that is placed on top of the base and has a side wall along the lower edge and arcuate side walls in the corner areas above it, forming two open cutouts placed opposite each other between the side wall and the arcuate walls and one open cutout between the arcuate walls, with the lid placed on top of the base with its side wall located outside the straight side wall of the base and the arcuate side walls outside the arcuate side walls forms at the base to form the indicated openings for straight sections of the cable duct; on the base, parallel to the straight side wall, there is a flat partition made integral with the base in the form of a plate to form an insulated channel compartment between the straight side wall and the partition for placing wires, as well as those made in an arcuate shape flat partitions in the form of curved plates, which are placed inside the base cavity opposite the arc-shaped side walls and at a distance from them to form insulated separate sections for housing wires, organized between the arc-shaped flat partitions and the arc-shaped side walls and between the arc-shaped flat partitions and the flat a partition in the form of a plate, wherein the height of the partitions is greater than the height of the side walls of the base and is equal to the depth of the cover, in which a recess is made along its flat straight wall for inserting the free edge of the flat partition in the form of a plate on the base, and an arc-shaped recess for inserting into them free edges of the arc-shaped flat partitions of the base.

Moreover, in this section, on the outer surface of the flat straight wall of the base, a rectilinear recess is made, running along the length of this wall, on the outside of the arc-shaped side walls there is a recess made on each, running along the length of this wall, and on the inner surface of the side walls of the cover there are protrusions for insertion them into the recesses on the outer surfaces of the base when putting the lid on the base.

In addition, on the inner surfaces of the side walls of the cover in the areas of bending of these walls from the top wall, stiffening ribs are made in the form of flat protrusions.

And the length of the cover, measured along the lower edge of its side wall between two openings located opposite each other, is longer than the length of the base, measured along its straight side wall of the base. And the height of the cover, measured from its side wall between two openings located opposite each other, is greater than the height of the base, measured from the straight side wall of the base.

These features are interrelated and are essential to form a stable set of essential features sufficient to obtain the required technical result.

This utility model is illustrated by a specific example of execution, which, however, is not the only possible one, but clearly demonstrates the possibility of achieving the required technical result.

In fig. 1 - view of the T-shaped outlet from the cover side;

fig. 2 - view of the T-shaped bend from the base side;

fig. 3 - view of the cover from its front side;

fig. 4 - view of the base from its inner side;

fig. 5 - view of the cover from the inside;

fig. 6 - view of the base from the back.

According to this utility model, we consider the design of a thin-walled shaped section made of polymer insulating material, T-shaped in plan, used to connect at right angles three straight sections of the cable duct.

The shaped section, also called a bend, is made of thin-walled polymer material and has a T-shape in plan, at the ends of the bend there are three openings for straight sections of the cable duct. In this design, two openings are located opposite each other and open in different directions, and the third, also open, is located transverse to the first two (Fig. 1-6).

The T-bend consists of two elements - base 1 and cover 2, made by thin-wall molding (injection molding and extrusion) or otherwise from plastic, preferably acrylonitrile butadiene styrene copolymer (commonly known as ABC plastic, characterized by high impact resistance and good electrical insulating properties).

The base 1 is made with a flat bottom, in which there are oblong-shaped holes (in particular, oval-shaped) used for securing the base to the supporting surface (wall). This flat base is made with shallow rectilinear recesses that correspond to the same shape of protrusions on the bottom wall of the inserted straight section of the cable duct. The combination of the recesses and protrusions of the base and the section makes it possible to strictly positionally fix the section in the T-shaped outlet in order to align/join the partitions of the outlet and the section.

Along the lower edge of the bottom of the base there is a side straight wall 3, on the outer surface of which there is a rectilinear recess 4 running along the length of this wall. This recess is used to recess some of the protrusions of the cover when it is placed on the base. And in the corner zones above the straight wall there are two side walls 5 of an arcuate shape, turned in different directions so that they form on the base two open cutouts placed opposite each other, which are located between the side straight wall 3 and the arcuate walls 5, and one open cutout between the walls 5 of an arcuate shape, located transversely to the first open cutouts. On the side walls 5 of an arcuate shape, on the outside there is an arcuate recess 6 running along the length of this wall. These two recesses 6 are used to recess other protrusions of the cover when it is placed on the base.

On the base 1, parallel to the side straight wall 3, a flat partition 7 in the form of a plate is placed integral with the base, which makes it possible to form an insulated separate channel compartment 8 for placing wires (in particular, for wires of a low-current system). On the base 1, two flat partitions 9 in the form of curved plates are also made in an arcuate shape, which are placed inside the base cavity opposite the side walls 5 of the arcuate shape and at a distance from them. This allows isolated, separate channel compartments 10 to be formed to accommodate other wires. These compartments 10 are organized between arc-shaped flat partitions 9 and arc-shaped side walls 5 (for wires of low-current systems). A separate channel compartment 11 is also organized between arc-shaped flat partitions 9 and a flat partition 7 in the form of a plate (for power system wires).

Thus, the base has a structure that is quite developed in terms of spatial architecture, in which the height of the partitions 7 and 9 is greater than the height of the side walls 3 and 5 of the base and is equal to the depth of the cover 2. The use of partitions is aimed not only at organizing isolated channel compartments, but also to give spatial the rigidity of the structure in which these partitions serve as flat stiffeners. Deformation forces (for example, bending) arising on the straight wall 3 and implemented across or along it do not coincide in vector with the vectors of the same deformations on the arcuate elements of the base, which leads to mutual cancellation of shear deformations and, as a consequence, retention of shape.

The cover 2 is made in a T-shape and is put on top of the base 1; this cover has a side wall 12 along the lower edge, which, in the preferred embodiment, is made slightly convex for ease of putting it on the base. On the inner surface of this side wall there are protrusions 13 for inserting them into the recess on the outer surface of the straight base wall 3 when the cover is placed on the base. Making the wall 12 slightly curved makes it possible to increase its elastic qualities, since when put on the protrusions slide along the wall 3, which leads to its bending. When the protrusions 13 enter the recess 4 under the action of the elastic forces of the material, the lid returns to its original position and is pressed against the wall 3, pressing the protrusions against the walls and bottom of the recess 4.

In the corner areas of the lid above the side wall 12 there are side walls 14 of an arcuate shape, forming two open cutouts located opposite each other between the side wall 12 and the walls 14 of an arcuate shape and one open cutout between the walls 14 of an arcuate shape. When the cover is placed on top of the base, its side wall 12 is located outside the straight side wall 3 of the base, its arc-shaped walls 14 are located outside the side walls 5 at the base, when the cover and base are combined, openings are formed for straight sections of the cable duct: two opposite each other and one transverse to them. On the inner surface of the side walls 14 of the arc-shaped lid there are protrusions 15 for inserting them into the recesses 6 on the outer surfaces of the walls 5 when putting the lid on the base. In addition, on the inner surfaces of the side walls of the cover in the areas of their inflection from the upper wall 16, stiffening ribs 17 are made in the form of flat protrusions. When putting on the lid, the side walls 14 slide with their protrusions along the outer surface of the walls 5 until the protrusions fall into the recesses 6, while the wall 12 bends and also slides along the wall 3 until the protrusions 14 enter the recess 4. At this moment, the wall 12 returns to initial position and elastic force presses all the protrusions against the walls of the recesses, ensuring that the walls of the lid adhere to the walls of the base.

In the lid along its side wall 12 there is a recess 18 with a linear orientation, which is used to insert the free edge of the flat partition 7 of the base into it. On the same inner surface in the lid there are arc-shaped recesses 19 for inserting into them the free edges of the arc-shaped flat partitions 9 of the base. The recesses can be made in the form of grooves between linear projections, as shown in Fig. 5. When putting the lid on the base of the partition, the free edge parts 7 and 9 are inserted into the recesses 18 and 19 and fixed in them to prevent their bends. The loads from the laid wires and at the point of their branching are transferred to the partitions and are perceived by the cover and base as reactive moment supports. The T-bend structural system becomes balanced and, as a result, does not change its shape in the cable channel system.

During installation, straight sections can be laid end-to-end against the walls of the outlet. In this case, the docking area becomes visible. In the joining area, the ends of straight sections may have deformation bends and not lie flat. To eliminate this phenomenon and increase the reliability of the positional arrangement of the ends of the straight sections, the length of the cover, measured along the lower edge of its side wall between two openings located opposite each other, is made greater than the length of the base, measured along the straight side wall of the base. In this case, as an option, the height of the cover, measured from its side wall between two openings located opposite each other, can additionally be made greater than the height of the base, measured from the straight side wall of the base. Body overlaps 20 are formed in the lid, which are located above the joining zones and which cover these zones, while simultaneously aligning the position of the end mating parts of the straight sections covered with lids. With this design, the internal partitions of the outlet are aligned strictly in relation to the partitions of the straight sections.

This utility model is industrially applicable and makes it possible to ensure the preservation of the shape of the outlet when its walls are loaded with pressure from the wires.

Claims (5)

1. A shaped section for connecting at right angles three straight sections of the cable duct, made of thin-walled polymer material and T-shaped in plan with three openings for straight sections of the cable duct, two of which are located opposite each other and open in different directions, and the third is located transversely to the first two, containing a base with a flat bottom with oblong-shaped holes used for fastening to the supporting surface, having a straight side wall along the lower edge and in the corner areas above it arc-shaped side walls, forming two open cutouts placed opposite each other between a side straight wall and arc-shaped walls and one open cutout between the arc-shaped walls, a T-shaped cover that is placed on top of the base and has a side wall along the lower edge and in the corner areas above it arc-shaped side walls, forming two placed opposite each other open cutouts between the side wall and the arcuate walls and one open cutout between the arcuate walls, wherein the lid is put on top of the base with its side wall located outside the side straight wall of the base and the arcuate side walls outside the arcuate side walls at the base to form the specified openings for straight sections of the cable duct, characterized in that on the base, parallel to the side straight wall, a flat partition in the form of a plate is placed integral with the base to form an insulated channel compartment between the side straight wall and the partition for placing wires, as well as arc-shaped flat partitions in in the form of curved plates, which are placed inside the base cavity opposite the arc-shaped side walls and at a distance from them to form insulated channel compartments for placing wires, organized between the arc-shaped flat partitions and the arc-shaped side walls and between the arc-shaped flat partitions and the flat partition in the form plates, wherein the height of the partitions is greater than the height of the side walls of the base and is equal to the depth of the lid, in which there is a recess along its flat straight wall for inserting the free edge of the flat partition in the form of a plate on the base, and arc-shaped recesses for inserting the free edges into them arc-shaped flat partitions of the base. 2. The shaped section according to claim 1, characterized in that on the outer surface of the flat straight wall of the base there is a rectilinear recess running along the length of this wall, on the outside on the arc-shaped side walls there is a recess on each, running along the length of this wall, and on the inner The surfaces of the side walls of the cover are made with protrusions for inserting them into recesses on the outer surfaces of the base when putting the cover on the base. 3. The shaped section according to claim 1, characterized in that on the inner surfaces of the side walls of the cover in the areas of inflection of these walls from the top wall there are stiffening ribs in the form of flat protrusions. 4. The shaped section according to claim 1, characterized in that the length of the cover, measured along the lower edge of its side wall between two openings located opposite each other, is longer than the length of the base, measured along the straight side wall of the base. 5. The shaped section according to claim 1, characterized in that the height of the cover, measured from its side wall between two openings located opposite each other, is greater than the height of the base, measured from the straight side wall of the base.