RU2726630C1 - Flat wire for indoor installation - Google Patents

Abstract

FIELD: electrical engineering.SUBSTANCE: invention relates to construction electrical engineering and is intended for use as a flat wire for laying mainly in rooms. Flat wire contains conductive conductors located inside along the wire length and enclosed in an insulating protective and structurally holding shell. Number of N wires is selected within 1≤N≤12 with Si cross-section area, where 1≤i≤N, each of the cores with respect to cross-section area S of the entire wire selected within 1.011≤(Si+S)/S≤2. At that, geometric centers of conductor cross-sections are located inside wire at minimum distances Rn, where 1≤n≤12, from envelope of each section of line wire, interconnected with minimum thickness D1 of wire by expression 1.1≤(Rn+D1)/D1≤1.5, and wire thickness D1 is selected relative to wire section maximum dimension D2 from ratio of 1.05≤(D1+D2)/D2≤2.EFFECT: invention increases mechanical strength of wire at reduction of heat release, its prime cost and increased convenience of practical use.4 cl, 1 dwg

Description

The invention relates to the field of construction electrical engineering and is intended for use as a flat wire for laying mainly indoors.

Known devices similar in purpose to the claimed object and having similar essential features, for example, protected by US patents: USRE42085 by Newire, Inc., US5807141, US5899774, US5804768, US6107577 and US6492595. The devices described in the Chinese patent applications CN201440346 and the UK GB2415540A can also be referred to analogs.

The disadvantages of the known devices are their unsatisfactory mechanical strength in some cases, insufficient heat transfer, relatively high cost due to the complexity and cumbersome design, as well as the comparative inconvenience of their use. The closest analogue of the claimed object by similar essential features is a device protected by USRE42085 by Newire, Inc.

The problem to be solved consists in the need to improve the known devices to eliminate their indicated shortcomings with the achievement of a technical result in relation to increasing the mechanical strength of the claimed wire while reducing heat transfer, the cost of manufacturing it and increasing the convenience of practical use.

The specified technical result is achieved with the help of the proposed device, characterized by the claims and schematically reflected in the following drawing.

FIG. 1 Schematic representation of flat wire for indoor installation.

Interpretation of digital designations in the drawing:

1. Flat wire for indoor installation;

2. Live conductors;

3. Insulating, protective and structurally retaining sheath;

4. Cross-sectional area of Si core;

5. Cross-sectional area S of the whole wire;

6. A line enveloping each section of the wire;

7. Geometric centers of adjacent sections of veins;

Decoding of the symbols of the most important geometric parameters of the structural features of the wire used:

1. N - the number of wire cores;

2. Si - cross-sectional area, where 1≤i≤N, of each of the cores;

3. S is the cross-sectional area of the entire wire;

4. Rn - the minimum distances, where 1≤n≤12, of the geometric centers of the sections of the conductors from the envelope of each section of the wire of the line;

5. D1 - wire thickness;

6. D2 - the maximum size of the wire cross-section;

7. Rjmin - the minimum distance between the geometric centers of adjacent sections of conductors inside the wire, where 1≤j≤12;

8. Rjmax - the maximum distances between the geometric centers of adjacent sections of conductors inside the wire, where 1≤j≤12;

9. αn experimental coefficient selected depending on the electrical conductivity of the material of each of the cores in the range 0.19≤αn≤1.2;

10. ρ is the electrical conductivity of the core material.

When describing in detail the claimed flat wire for laying in rooms, it is impractical to dwell on its design features that are widely known from the above-described prior art. It is necessary to describe in detail only its distinctive features, an indissoluble combination and interrelation of which are aimed at achieving the specified technical result. For this, flat wire 1 (Fig. 1) for laying in rooms contains current-carrying conductors 2 located inside along the length of the wire 1 and enclosed in an insulating protective and structurally holding sheath 3. The number of N conductors 2 is selected within the range 1≤N≤12 s cross-sectional area 4 Si, where 1≤i≤N, each of the cores 2 with respect to the cross-sectional area 5 S of the whole wire, selected in the range 1.01 1≤ (Si + S) / S≤2. In this case, the geometric centers 7 of the conductor cross-sections 2 are located inside the wire 1 at the minimum distances Rn, where 1≤n≤12, from the envelope of each wire cross-section of the line 6, interconnected with the minimum wire thickness D1 by the expression 1,1≤ (Rn + D1) / D1 ≤1.5, and the thickness D1 of the wire is selected with respect to the maximum dimension D2 of the wire cross-section from the ratio 1.05≤ (D1 + D2) / D2≤2.

The claimed wire also differs in that the geometric centers of 7 adjacent conductor cross-sections inside the wire are located at the minimum distances Rjmin between them, selected in relation to the maximum distances Rjmax, where 1≤j≤12, between them, from the expression 1.05≤ (Rjmin + Rjmax) / Rjmax≤2. An additional difference between the wire is that the value of Rn is corrected using the coefficient αn with a change in the values of the lower and upper limits in the expression 0.23≤ (αnRn + D1) / D1≤1.8, where αn is the experimental coefficient selected depending on the electrical conductivity material of each of the veins within 0.19 <αn <1.2. A distinctive feature of the wire can also be the choice of copper as the material of the cores, with deviations Δр of the values of its electrical conductivity from the maximum value of ρ along the length of the wire, within 0.91≤ (ρ-Δρ) /ρ≤1.

Thus, as follows from the foregoing, the features indicated in the claims are essential and are purposefully interconnected with each other to form a stable set of them, necessary and sufficient to obtain the specified technical result. The achieved technical result, as shown by the experimental data, can be realized only by an interconnected set of all the essential features of the claimed object, reflected in the claims, at any values covered by the requested claims and satisfying the stated features. The claimed essential distinctive features were obtained on the basis of creative processing of the results of research and experiments, analysis and generalization of them and known from published data sources, interconnected by the conditions for achieving the technical result specified in the application, as well as using inventive intuition.

At the same time, the concept of legal protection is based on the fact that the continuity and interconnectedness, as well as the permissible variability of the implementation of individual essential features or their combinations, predetermine, among other things, the non-traditional nature of the formulations of some features. For example, the design features of a flat wire for laying in rooms are reflected not only by the characteristics of the nodes included in it and their structural relationships, but also with the help, in particular, of the design characteristics of the main nodes of the patented object using their essential geometric parameters, namely: Si, S, Rn, D1, D2, Rjmin, Rjmax, etc. In this case, the selected values of the lower and upper limits of the declared analytical ratios provide the required coverage of the values of the main design parameters of the device being patented for the applicant.

The foregoing obviously predetermines the compliance of the claimed invention not only with the condition "novelty", but also with the "inventive step". The proposed flat wire for laying indoors, the canvas does not contain features that cannot be implemented using known technologies and devices. Compliance with the criterion of "industrial applicability" of the proposed object is also proved by the absence in the stated claims of any features that are practically difficult to implement on an industrial scale.

Among other advantages of the described flat wire for laying in rooms, it is possible to note the relatively low cost of its manufacture and attractive ergonomic indicators, reduced weight and dimensions, increased reliability and ease of use of the proposed device.

Claims (4)

1. Flat wire for indoor installation, containing current-carrying conductors located inside along the length of the wire and enclosed in an insulating protective and structurally holding them shell, characterized in that the number of N conductors is selected within the range 1≤N≤12 with a cross-sectional area Si, where 1≤i≤N, each of the cores with respect to the cross-sectional area S of the entire wire, selected in the range 1.011≤ (Si + S) / S≤2, while the geometric centers of the cross-sections of the conductors are located inside the wire at minimum distances Rn, where 1≤ n≤12, from the envelope of each wire cross-section of the line, interconnected with the minimum wire thickness D1 by the expression 1.1≤ (Rn + D1) / D1≤1.5, and the D1 wire thickness is selected in relation to the maximum size D2 of the wire cross-section from the ratio 1 , 05≤ (D1 + D2) / D2≤2. 2. The wire according to claim 1, characterized in that the geometric centers of neighboring sections of the conductors inside the wire are located at the minimum distances Rjmin between them, selected in relation to the maximum distances Rjmax, where 1≤j≤12, between them, from the expression 1.05 ≤ (Rjmin + Rjmax) / Rjmax≤2. 3. A wire according to claim 1, characterized in that the value of Rn is corrected using the coefficient αn with changing the values of the lower and upper limits in the expression 0.23≤ (αnRn + D1) / D1≤1.8, where αn is the experimental coefficient, selected depending on the electrical conductivity of the material of each of the cores in the range of 0.19≤αn≤1.2. 4. A wire according to claim 3, characterized in that copper with deviations Δρ of its electrical conductivity values from the maximum value of ρ along the length of the wire in the range of 0.91≤ (ρ-Δρ) / ρ≤1 is selected as the core material.

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