RU225806U1 - Shaped section for closing the transition zone surrounding the outer corner of the wall of two straight sections of cable duct - Google Patents

Abstract

The utility model relates to electrical engineering. The technical result consists in increasing the strength of the thin-walled shaped section. For this purpose, a shaped section for closing the transition zone of two straight sections of the cable duct enveloping the outer corner of the wall contains two parts made of thin-walled polymer electrical insulating material and each of which is made in the form of a plate with edge sections bent transversely to the central part, which are made tapering from the inflection zone to free edge. The central part is flat and has an arched curve at one edge. On the rounding side, inside one part, on the side of the free edges of the bent sections, there are holes; on the rounding side, inside the other part, on the side of the free edges of the bent sections, cylindrical protrusions are made, facing towards each other. A part with holes on the rounding side of the central part is inserted into the cavity of a part with protrusions, which are inserted into these holes to allow rotation of one part relative to the other around the common axis of the protrusions. Flat projections are made on the inner surface of the wall of one part to limit the angular displacement of one part relative to the other part. The free edges of the bent parts are made arcuately bent in opposite directions, and trapezoidal-shaped hooks are made on the inner surface of the arcuately bent edges for connection with straight boxes. 7 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 two directions.

In particular, the utility model relates to cable duct systems for electrical installations and concerns the design of a shaped polymer section for connecting at right angles two straight sections of a cable duct that go around the outer corner of a wall.

Known cable ducts made of polymer material 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.

When installing sections of such a box, situations arise when the wires are redirected. For example, when the wires need to be laid in a direction perpendicular to the location of another straight box. This situation arises when it is necessary to go around the outer corner of connected walls. The junction of two straight boxes is closed by an external outlet - a shaped section with two entrance openings for boxes/sections. This shaped section, in fact, is an outer cover that covers the transition area of the boxes through the corner. The peculiarity of straight cable boxes is that they do not bend or bend. During installation, two fragments of a straight box are cut off and each fragment is fixed on one side of the wall with the end parts located as close to each other as possible. The corner area itself remains open. This area is covered with a removable cover, which has the ability to change its geometry for precise positioning on straight boxes if the right angle deviates from 90°.

A corner device is known, located at the junction of at least two differently directed boxes, containing two separate panels, one of which contains a protruding element, and the other contains a round hole into which said protruding element enters with the possibility of rotating said panels around the Y axis, while on the round edge of the said hole, a local hole is made in the form of a straight slot, directed radially relative to the round edge of the said hole and extending onto the free edge of the said flap, while the protruding element is made in the form of a cylindrical wall, the outer diameter of which, taking into account the gap, is equal to the inner diameter of the round hole, so that when one flap is rotated relative to the other, the outer side of the specified cylindrical wall slides along the edge of the round edge of the specified hole, and the height of the cylindrical wall is variable along its circumference (RU 2471275, H02J 3/08, publ. 12/27/2012).

The known design is structurally complex, as it is designed to be built into straight boxes with its edge parts. This means that during installation, one straight box is first fixed, then this device is fixed on it, and then the end part of the second straight box is inserted into this device. But the wiring and layout of wires in straight boxes is carried out without covers and devices covering them. If you follow the technology of using a known device, it turns out that first you install one box and a device that covers the corner area, and then you need to try to stretch the wires through the closed corner section of the cable system. And only after that fix the second straight box. In this case, this second box must be installed so that the outermost part of the corner fixture fits into the box.

This creates certain difficulties in laying long wires.

There is a known shaped section for closing the transition zone of two straight sections of a cable duct that go around the outer corner of the wall, containing two bases made of the same shape in the form of thin-walled plates, the ends of which are bent in one direction from the central part and installed transversely to this central part, and on each base the bent ends have two holes located opposite each other, both bases are located at angles to each other, the opening area between the bases is closed with a cover made in the form of a thin-walled plate, the ends of which are bent in one direction from its central part and installed transversely to this central part parts, inside the cover at the bent ends there are two protrusions in the shape of a cylinder, each located opposite each other, one base is inserted into the other base with the holes on the bent ends aligned, and the cover is located on top of the bases and the protrusions are inserted into the aligned holes to ensure the rotation of the bases around the protrusions within the width of the cover (see “The angle for the external cable channel is variable 80-120 degrees. 90×50 with divider.DKC 0955", posted in the offer for sale mode on the YandexMarket website on the Internet at: hppts://market.yandex.ru/product-

ugol-vneshnii-dlia-nastennogo-kabel-kanala-dkc-

09552/1777398621?sku=471830114&do-

waremd5=V0XhyPmd5yNRrbCHrpDZUg&uniqueId=76902178) (identified March 2023, copy attached).

This solution was adopted as a prototype.

The disadvantage of this solution is the complexity of the design due to the need to use three parts and the complexity of assembling this shaped section. The assembly of the three parts itself consists of aligning the through holes on the bent ends of the bases, inserting these ends into the cavity of the lid, slightly bending these ends so that the holes are located under the protrusions, and straightening the bent ends so that the protrusions fall into the aligned holes. But above the protrusions in the lid there are flat shields that cover the protrusions. That is, after the protrusions fall into the aligned holes, these shields must cover the protrusions so that the entire structure does not fall apart. And to do this, you must first not only bend the ends of the bases, but also bend the shields away from the protrusions. This is not technologically advanced and leads to damage to the shields.

At the same time, this section is held on straight boxes due to the fact that when putting on the section, the bent parts of the bases are pressed out, and after the lid has sat on the straight boxes, these parts are elastically pressed against the side walls of these boxes. This type of fastening is not reliable.

This utility model is aimed at achieving a technical result consisting in increasing the strength of a thin-walled shaped section.

The specified technical result is achieved by the fact that the shaped section for closing the transition zone of two straight sections of the cable duct enveloping the outer corner of the wall contains two parts made of thin-walled polymer electrical insulating material and each of which is made in the form of a plate with edge sections bent transversely to the central part, which are made tapering from the bend zone to the free edge, the central part is made flat and has an arc-shaped rounding at one edge, the shape of the outer surface of which on one part repeats the shape of the rounding on the inner surface of another part; on the rounding side, inside one part, on the side of the free edges of the bent sections, holes are made , on the rounding side inside the other part, on the side of the free edges of the bent sections, there are cylindrical protrusions facing towards each other, while the part with holes with the rounded part is inserted into the cavity of the part with protrusions from the side of its rounded part, the protrusions are inserted into these holes to allow rotation one part relative to another around the common axis of the protrusions, on the inner surface of the wall of one part there are flat protrusions to limit the angular displacement of one part relative to the other part, and the free edges of the bent parts are made arcuately bent in opposite directions and trapezoidal shaped hooks are made on the inner surface of the arcuately bent edges for connection to straight boxes.

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 - general view of the shaped section from the front side;

fig. 2 - top view of the shaped section;

fig. 3 - view of the section from the back;

fig. 4 - view of the part with holes from its front side;

fig. 5 - view of the part with holes from its back side;

fig. 6 - view of the part with protrusions from its front side;

fig. 5 - view of the part with protrusions from its back side.

According to this utility model, the design of a thin-walled shaped section made of polymer electrical insulating material is considered, which is used to close the transition zone of two straight sections of the cable duct enveloping the outer corner of the wall.

Quite often, the outer corner of a wall, considered as a right angle, in reality has deviations from the geometric right angle. In this regard, the use of known sections, molded at right angles and not having adjustment of the position of one part relative to another, does not allow the correct closing of laid out straight boxes on different wall surfaces. The solution to this problem is to provide the possibility of angular adjustment of the position of one part of the section relative to the other in order to compensate for the discrepancy between the wall angle and the right angle.

The shaped section according to the present utility model is made of thin-walled polymer material (preferably acrylonitrile-butadiene-styrene copolymer, known on the market as ABC plastic, characterized by high impact resistance and good electrical insulating properties) and consists of two parts 1 and 2.

Each of these two parts is made in the form of a plate with edge sections 4 bent transversely from the central part 3, which are made tapering from the bend zone to the free edge 5. The central part 3 is made flat and has an arcuate rounding 6 at one edge, the shape of the outer surface of which is on one part repeats the shape of the rounding on the inner surface of another part. One part 1 with its rounded part is inserted into the cavity of another part 2 from the side of its rounded part. In the initial state, the parts are located at an angle of 90° to each other. The curves on the central parts 3 allow the parts to move along the rounded surfaces and slide across them (Figs. 1 and 2). To limit the angular movement, flat projections 7 are made on the inner surface of the wall of one part to limit the angular displacement of one part relative to the other part. This design of parts allows for angular displacement of parts in the range from 80° to 100°. Thanks to this design, one part has the possibility of angular movement relative to that fixed on a straight box in the range of ±10° from the right angle, and the above-mentioned protrusions on the parts limit the movement of one inside the other. Angular adjustment of the shaped section allows you to compensate for the deviation from perpendicularity of the external corner formed at the junction of the walls on which straight sections of cable ducts are installed.

On the rounding side inside one part 1, on the side of the free edges of the bent edge sections 4, holes 8 are made, and on the rounding side inside the other part 2, on the side of the free edges of the bent edge sections, cylindrical protrusions 9 are made (Fig. 7), facing towards each other. Part 1 with holes 8 with a rounded part is inserted into the cavity of part 2 with protrusions on the side of its rounded part, and the protrusions are inserted into these holes to allow one part to rotate relative to the other around the common axis of the protrusions with the ability to slide along the surfaces of the curves 6 (Fig. 3-7 ).

When installing on straight boxes fixed to the walls in the corner area, each part is placed on top of its own box. The position of the parts along the corner of the wall is adjusted autonomously without the participation of the installer. A straight box along its length in the area of the bottom wall has a recess on the outside like an open groove. And the parts on the free edges of the bent parts on their inner side have hooks 10 of a trapezoidal shape. When landing, the part is placed on top of the box, the edge sections 4, like walls, are bent, the hooks slide along the side walls of the box and fall into the recesses of the box in the area of its bottom. Parts 1 and 2 snap onto straight boxes. The moment of bending of the edge sections with hooks (when sliding along the walls of the box) leads to deformation of the part in the bend zone of these sections from the central part, which can lead to breakage of the thin-walled structure. To eliminate this phenomenon, the free edges 5 of the end edge sections 4 are made arcuately bent (item 11) in opposite directions. And the hooks 10 are made on the inner surface of the arched edges. When putting on the parts, the hooks push the edge sections 4 apart. In this case, the deformation of the sections 4 in the area of the bent edges (item 11) is greater than the deformation of these sections in the zone of their inflection from the central part, that is, the inflection zone of the sections 4 is unloaded, as a weak point in the structure .

This utility model is industrially applicable. Allows you to increase the operational strength of a shaped thin-walled section while simplifying the design.

Claims (1)

A shaped section for closing the transition zone that goes around the outer corner of the wall of two straight sections of the cable duct, containing two parts made of thin-walled polymer electrical insulating material and each of which is made in the form of a plate with edge sections bent transversely to the central part, which are made tapering from the bend zone to the free one edges, the central part is made flat and has an arc-shaped rounding on one edge, the shape of the outer surface of which on one part repeats the shape of the rounding on the inner surface of another part, on the rounding side inside one part, holes are made on the side of the free edges of the bent sections, on the rounding side inside the other the parts on the side of the free edges of the bent sections are made of cylindrical shape, the protrusions are facing towards each other, while the part with the holes with the rounded part is inserted into the cavity of the part with the protrusions on the side of its rounded part, the protrusions are inserted into these holes to allow rotation of one part relative to the other around a common axis of the protrusions, on the inner surface of the wall of one part there are flat protrusions to limit the angular displacement of one part relative to the other part, and the free edges of the bent parts are made arcuately bent in opposite directions and on the inner surface of the arcuately bent edges there are trapezoidal hooks for connection with straight boxes.