CN102778192A - Measuring tool for turning radius of high-voltage cable - Google Patents

Abstract

The invention relates to a high-voltage cable turning radius measuring tool. Its main technical characteristics are: it includes a horizontal ruler and an elastic rod, the fixed end of the elastic rod is fastened with one end of the elastic rod, and the movable end of the elastic rod is installed movably. In the slideway formed on the surface of the horizontal ruler, when the moving end of the elastic rod is subjected to an external force towards the fixed end, the elastic rod will naturally form a circular arc with a changing radius. The invention provides a tool for directly measuring the turning radius of a high-voltage cable, which connects a horizontal ruler engraved with the turning radius with an elastic rod, and makes the elastic rod coincide with the high-voltage cable by applying an external force on the moving end of the elastic rod The arc of the cable can be obtained by directly reading the scale at the intersection of the horizontal ruler and the elastic rod to obtain the turning radius of the cable arc. It has high measurement accuracy, is easy to use, and has a wide range of measurement.

Description

High voltage cable turning radius measurement tool

technical field

The invention belongs to the field of high-voltage cables, in particular to a tool for measuring the turning radius of high-voltage cables. the

Background technique

During the laying process of high-voltage cables, national standards and relevant regulations should be strictly followed to ensure the normal function of high-voltage cables. According to national standards, during the laying process of high-voltage cables, their turning radius should not be less than 20 times their diameter D. At present, there is no tool for direct measurement of the turning radius of high-voltage cables. The usual measurement method is to measure the diameter of the cable in advance, and then use a steel plate to make an arc-shaped ruler of the corresponding diameter, and finally use the arc-shaped ruler on the construction site. Measurement, the measurement method is very inconvenient, and the measurement accuracy is low. the

Contents of the invention

The object of the present invention is to overcome the deficiencies of the prior art, and provide a high-voltage cable turning radius measuring tool with reasonable design, high measurement accuracy and convenient use. the

The present invention solves its technical problem and realizes by taking the following technical solutions:

A tool for measuring the turning radius of a high-voltage cable, which includes a horizontal ruler and an elastic rod. In the track, when the moving end of the elastic rod is subjected to an external force towards the fixed end, the elastic rod forms a circular arc with a changing radius. the

Moreover, a scale for calculating the turning radius of the cable is made on the surface of the horizontal ruler. the

Moreover, the scale for calculating the turning radius of the cable satisfies the following formula:

$\mathrm{<span\; class="notranslate">\; r</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; x</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; the\; y</span>}}$

In the above formula, r is the turning radius, x is the length of the horizontal ruler, and l is the arc length. the

Advantage and positive effect of the present invention are:

The invention provides a tool for directly measuring the turning radius of a high-voltage cable, which connects a horizontal ruler engraved with the turning radius with an elastic rod, and makes the elastic rod coincide with the high-voltage cable by applying an external force on the moving end of the elastic rod The arc of the cable can be obtained by directly reading the scale at the intersection of the horizontal ruler and the elastic rod to obtain the turning radius of the cable arc. It has high measurement accuracy, is easy to use, and has a wide range of measurement. the

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic diagram of the measurement principle of the present invention. the

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings. the

A high-voltage cable turning radius measurement tool, as shown in Figures 1 and 2, includes a horizontal ruler 2 and an elastic rod 1, the horizontal ruler and the elastic rod are installed in parallel, and the fixed end of the elastic rod is connected to one end of the elastic rod Tightly installed together, the moving end of the elastic rod is movably installed in the slideway 4 made on the surface of the horizontal ruler. When the moving end of the elastic rod is subjected to an external force towards the fixed end, the elastic rod will naturally form a circle with a changing radius. The radius of the arc can be accurately calculated by measuring the length of the arc and the distance on the horizontal ruler. In order to visually measure the turning radius of the cable, a scale 3 for calculating the turning radius is made on the surface of the horizontal ruler. the

The measurement principle of the present invention will be described below in conjunction with FIG. 2 . In the figure, x is the length of the horizontal ruler, l is the length of the arc, and r is the turning radius, then the length x of the horizontal ruler satisfies the following formula:

$\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; r</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; sin</span>}\frac{\mathrm{<span\; class="notranslate">\; l</span>}}{\mathrm{<span\; class="notranslate">\; 4</span>}\mathrm{<span\; class="notranslate">\; r</span>}}$

From the above formula, the turning radius r can be obtained as:

$\mathrm{<span\; class="notranslate">\; r</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; x</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; the\; y</span>}}$

Thereby accurately calculating the turning radius of the cable arc. the

In order to intuitively measure the cable turning radius, the calculated value of the above cable turning radius r can be engraved on a horizontal ruler to form a horizontal ruler engraved with the cable turning radius, and its measurement range can be from a certain value to infinity. the

When used in the field, fix the fixed end of the high-voltage cable turning radius measurement tool on the high-voltage cable, adjust the position of the movable end on the horizontal ruler horizontally so that the elastic rod coincides with the bending degree of the high-voltage cable, and read on the horizontal ruler The turning radius of the cable can be directly obtained from the scale at the intersection point with the moving end of the elastic rod. The measurement method is simple and the measurement range is wide. the

It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive, so the present invention includes and is not limited to the embodiments described in the specific implementation, and those skilled in the art according to the technology of the present invention Other implementations derived from the scheme also belong to the protection scope of the present invention. the

Claims (3)

1. A high-voltage cable turning radius measuring tool is characterized in that: it comprises a horizontal ruler and an elastic rod, the fixed end of the elastic rod is fastened to one end of the elastic rod, and the movable end of the elastic rod is movably installed on the horizontal straight edge. In the slideway formed on the surface of the ruler, when the moving end of the elastic rod is subjected to an external force towards the fixed end, the elastic rod forms a circular arc with a changing radius. 2. The high-voltage cable turning radius measuring tool according to claim 1, characterized in that: a scale for calculating the turning radius of the cable is formed on the surface of the horizontal ruler. 3. The high-voltage cable turning radius measuring tool according to claim 2, characterized in that: the formula for calculating the scale of the cable turning radius is: $\mathrm{<span\; class="notranslate">\; r</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; x</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; the\; y</span>}}$ In the above formula, r is the turning radius, x is the length of the horizontal ruler, and l is the arc length.

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