CN114184822B - Phasor drawing protractor - Google Patents
Phasor drawing protractor Download PDFInfo
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- CN114184822B CN114184822B CN202111466227.1A CN202111466227A CN114184822B CN 114184822 B CN114184822 B CN 114184822B CN 202111466227 A CN202111466227 A CN 202111466227A CN 114184822 B CN114184822 B CN 114184822B
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- protractor
- phasor
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- circular
- voltage lines
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- 238000005259 measurement Methods 0.000 claims abstract description 8
- 239000003086 colorant Substances 0.000 claims description 4
- 239000012780 transparent material Substances 0.000 claims description 4
- 238000000059 patterning Methods 0.000 claims description 2
- 238000004458 analytical method Methods 0.000 abstract description 4
- 238000004364 calculation method Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 23
- 238000000034 method Methods 0.000 description 9
- 230000007547 defect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000007769 metal material Substances 0.000 description 4
- 238000013507 mapping Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000020347 spindle assembly Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
Abstract
The phasor drawing protractor comprises a circular chassis and an annular protractor, wherein the circular chassis and the annular protractor are matched for use. The round chassis evenly distributes three phase voltage lines around the circle center, and evenly distributes six line voltage lines around the circle center; the annular protractor is of a hollow ring structure in the middle, and lines and angle marks are engraved on the annular protractor along the outer ring. The phasor drawing protractor designed by the invention is developed aiming at electric energy metering phasor analysis of an electric power system. The position of the voltage of the three-phase voltage line is solidified in a slotting or perforating mode, so that quick drawing can be realized; the rotatable annular protractor with the scales of 0-359 degrees is used, the starting point of 0 degrees can be adjusted according to different line voltage positions obtained by measurement and judgment, the calculation and conversion of angles required by users are avoided, the difficulty of finding angles is greatly reduced, the convenience of use is improved, and the angular position of the current phasors of the same element is quickly and accurately positioned.
Description
Technical Field
The invention relates to the field of electric drawing tools, in particular to a phasor drawing protractor.
Background
Traditional phasor mapping methods: or manually drawing or comparing by using 180-360-degree protractors, wherein the 180-degree protractors on the market are used as 0-180-degree or 0-360-degree general drawing, the optimization design is not needed aiming at the requirement of electric energy metering professional phasor drawing in the electric power industry, the position of the current phasor is needed to be found by making phase voltage and line voltage one by one and then following the voltage-current included angle of the same element, the drawing speed is low, the scribing is needed to be judged by multiple angle measurement, the technical difficulty is high, the requirement on skills needed by phasor angle analysis of users is high, and the use is inconvenient.
CN113085417a discloses a tool for drawing and analyzing phasor diagrams, which uses a metal material as a disc panel, and is composed of a panel, a mandrel assembly, a plurality of marking arrows and a plurality of discs with pointer lines, wherein the mandrel assembly is connected with the panel and is positioned at the center of the panel, and a plurality of scale lines are arranged on the panel along the radial direction and are distributed in uniform included angles. One end of the pointer line is connected with the mandrel assembly, and the other end of the pointer line corresponds to the marking arrows one by one; the arrow is magnetically attracted to the panel. The pointer wire may be received within the spindle assembly. The mandrel assembly comprises a mounting shaft, a coil spring and a rotating sleeve, wherein the mounting shaft is connected with the panel and coincides with the central line. The panel is made of metal material with magnetism, and the marked arrows are made of metal material. According to the scheme, the metal magnetic material is adopted as the disc, the magnetic material is opaque, the arrow is magnetically adsorbed on the disc, the pointer rotates through the coil spring, the angle finding method is used for drawing through the invariable scale marks, and the following defects exist: (1) The structure is complex, the manufacturing difficulty is high, the cost is high, and the spring is easy to break off on the assembly by adopting the coil spring structure to cause faults. (2) The pointer lines and arrows are magnetically adsorbed, so that parts are easy to lose. (3) The metal disc panel is made of opaque materials, cannot see paper under the disc, and is not suitable for being used as stationery. (4) The angle line is a non-changeable zero scale starting point, the angle finding needs to be judged and converted, and the purpose of easy use and rapidness cannot be achieved. (5) The coil springs are used by a plurality of angle lines and arrows, and are complex to use and not easy to use.
CN 209312238U discloses "analog turntable of voltage-current phasor diagram", which is used as teaching aid for displaying the angular relationship among phase voltage, line voltage and current, and is convenient for students to understand. The object is not involved in the function of mapping phasors.
According to the comparison of the three schemes, the defects of low speed, high difficulty and poor accuracy of the traditional phasor drawing, or the defects of complex structure, high manufacturing cost, high failure rate, inconvenient use and the like exist, and the heavy opaque metal material is not suitable for being used as stationery; or the drawing on the paper surface of the learning examination is not suitable. Therefore, it is necessary to invent a tool which is low in cost, easy to use and suitable for phasor mapping.
Disclosure of Invention
In order to solve the problems, the invention provides a phasor drawing protractor, which has the following technical scheme:
the phasor drawing protractor comprises a round chassis and an annular protractor, wherein the round chassis and the annular protractor are matched for use;
the circular chassis is of a disc structure with an outer ring provided with a groove, and the groove is nested with the annular protractor; the circular chassis evenly distributes three phase voltage lines around the circle center, the phase voltage lines are provided with through grooves, the circular chassis evenly distributes six line voltage lines around the circle center, and the line voltage lines are provided with a series of through holes; the phase voltage line is spaced 30 ° from the adjacent line voltage line;
the annular protractor is of a ring structure with a hollow middle, lines and angle marks are engraved on the annular protractor along the outer ring, a ring groove is formed in the bottom surface of a ring of the annular protractor, and the outer diameter of the ring groove is larger than that of the circular chassis.
Further, the circular chassis is imprinted with a dashed line for auxiliary patterning, the dashed line comprising: and connecting adjacent phase voltage lines and line voltage lines, connecting opposite extension lines of the phase voltage lines and the line voltage lines, and connecting adjacent line voltage lines and line voltage lines, wherein the circle center of the circular chassis is used as the circle center, and the length of the phase voltage lines is used as the circle with the radius.
Further, the through groove is a trapezoid groove, and a round angle is arranged on the through groove; the through holes are trapezoid holes, and round corners are arranged on the through holes.
Further, marks are marked on the round chassis around the through groove, and the three marks are in different colors.
Further, the outer edge of the annular protractor is of a bevel structure.
Further, the round chassis and the annular protractor are made of transparent materials.
Further, the groove width is greater than the circular groove width shown.
Compared with the prior art, the beneficial effects are that:
the invention is formed by combining two parts, one part is a circular chassis with a groove and a through hole, the outer ring of the circular chassis is provided with a groove, and the other part is an annular protractor which can be embedded into the circular chassis and can rotate by 360 degrees, and lines and angle marks are marked on the outer ring of the circular protractor. The phasor-forming diagrammatical protractors are combined together.
According to the invention, the position of the voltage of the three-phase voltage line is solidified in a slotting or perforating mode, so that the drawing can be rapidly performed; the rotatable annular protractor with the scales of 0-359 degrees is used, the starting point of 0 degrees can be adjusted according to different line voltage positions obtained by measurement and judgment, the calculation and conversion of angles required by users are avoided, the difficulty of finding angles is greatly reduced, the convenience of use is improved, and the angular position of the current phasors of the same element is quickly and accurately positioned. The phasor drawing protractor designed by the invention is developed aiming at electric energy metering phasor analysis of an electric power system, and is also suitable for paper written answering scenes in learning and examination rooms, and accurate and rapid phasor drawing is realized by using the protractor.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic view of the structure of a circular chassis of the phasor diagram protractor of the present invention;
FIG. 2 is a schematic cross-sectional view of a circular chassis of the phasor diagram protractor of the present invention;
FIG. 3 is a schematic view of the structure of the through-hole of the phasor diagram protractor of the present invention;
FIG. 4 is a schematic diagram of the structure of the through slot of the phasor diagram protractor of the present invention;
FIG. 5 is a schematic view of the structure of the annular protractor of the phasor diagram protractor of the present invention;
FIG. 6 is a schematic view of the structure of the outer edge of the phasor diagram protractor of the present invention;
FIG. 7 is a schematic diagram of the structure of the phasor diagram of the present invention;
FIG. 8 is a schematic cross-sectional view of a phasor diagram of the present invention;
FIG. 9 is a schematic diagram of a method of using the phasor diagram protractor of the present invention, step 1;
FIG. 10 is a schematic diagram of a method of using the phasor diagram protractor of the present invention, step 2;
FIG. 11 is another schematic diagram of a method of using the phasor diagram protractor of the present invention, step 2;
FIG. 12 is a schematic diagram of a method of using the phasor diagram protractor of the present invention, step 3;
FIG. 13 is another schematic diagram of a method of using the phasor diagram of the present invention, step 3.
Detailed Description
Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
Other advantages and effects of the present disclosure will become readily apparent to those skilled in the art from the following disclosure, which describes embodiments of the present disclosure by way of specific examples. It will be apparent that the described embodiments are merely some, but not all embodiments of the present disclosure. The disclosure may be embodied or practiced in other different specific embodiments, and details within the subject specification may be modified or changed from various points of view and applications without departing from the spirit of the disclosure. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure are intended to be within the scope of this disclosure.
The invention is designed optimally against the defects of the prior art, and as shown in figures 1-8, the phasor drawing protractor comprises a circular chassis and an annular protractor. The circular chassis with grooves and through holes and grooves on the outer ring is combined with the annular protractor which can be embedded into the circular chassis and can rotate 360 degrees and is marked with lines and angles on the outer ring.
The circular chassis is a circular disc structure with grooves in the outer ring, as shown in figures 1 and 2, for nesting the annular protractor. The circular chassis evenly distributes three phase voltage lines around the circle center, namely the positions of ABC three phase voltage lines are mutually included at an angle of 120 degrees. In the figure, U a 、U b 、U c Is a phase voltage line. Six line voltage lines are evenly distributed around the circle center on the circular chassis, namely the line voltage positions form an included angle of 60 degrees with each other. In the figure, U ab 、U ac 、U bc 、U ba 、U ca 、U cb Is a line voltage line. Wherein the phase voltage line is spaced 30 ° from the adjacent line voltage line.
As shown in fig. 3 and 4, the positions of the phase voltage lines are provided with through grooves, the positions of the line voltage lines are provided with a series of through holes, and the positions of the three-phase voltage lines are solidified in a slotting or perforating mode, so that quick drawing can be realized. Wherein the through groove adopts inclined plane slotting to form a trapezoid groove, and the through groove is provided with a round angle; the through hole adopts the inclined plane trompil, forms trapezoidal hole, and the through hole is equipped with the fillet. The user can conveniently draw the line and map by using the sign pen and the pencil point inserted into the slot. Wherein, circular chassis is carved with the mark around leading to the groove position, and the three place mark adopts different colours.
In this embodiment, the through slot width is 3mm. The pen is suitable for drawing lines by using pen points of commonly used sign pens and pencils. When drawing, three different colors of yellow, green and red can be respectively adopted for marking U a 、U b 、U c . The diameter of the through hole was 2mm. Pen suitable for common sign watch and pencilAnd (5) drawing a circle with a sharp point. Fixing all line voltages U by means of a series of holes ab And U ba 、U cb And U bc 、U ac And U ca The location.
The circular chassis is carved with the dotted line of supplementary drawing, and the dotted line includes: the method comprises the steps of connecting adjacent phase voltage lines and line voltage lines, connecting opposite extension lines of the phase voltage lines and the line voltage lines, and connecting the adjacent line voltage lines and the line voltage lines, wherein the circle center of the circular chassis is used as the circle center, and the length of the phase voltage lines is used as the circle with the radius. As shown in FIG. 1, the auxiliary drawing dotted line is formed by combining regular triangle and circle to form a hexagonal drawing, so that the angle judgment and drawing are facilitated.
As shown in fig. 5 and 6, the annular protractor is of a hollow ring structure in the middle, lines and angle marks are engraved on the annular protractor along the outer ring, and a ring groove is formed in the bottom surface of the ring of the annular protractor. As shown in fig. 7 and 8, the outer diameter of the circular groove is larger than that of the circular chassis, the size of the concave part of the annular protractor is matched with that of the groove in the circular chassis, the width of the circular groove of the annular protractor is 2-3mm, and the width of the groove of the disc base is not smaller than 3mm. Can nest to the outer ring of the circular chassis and rotate smoothly.
In this embodiment, as shown in fig. 6, the outer edge of the ring-shaped protractor is of a beveled structure. And the design of inclined planes is used, so that scribing is convenient.
In this embodiment, the circular chassis and the annular protractor are made of transparent materials. The PC material of transparent material most commonly used in stationery manufacture is used as the material of the phasor drawing protractor, so that the manufacturing cost is low and the use reliability is high. Is suitable for paper surface drawing in learning and examination. Depending on the strength thickness of the transparent PC material, it is generally appropriate to choose 3mm-4 mm.
The method for using the phasor drawing protractor, as shown in fig. 9-13, comprises the following steps:
1. and (3) making phase voltages: placing the phasor diagram protractor at the position of the paper to be mapped, U a In the direction right above, the phase voltage U is inserted by using the pen point a 、U b 、U c Is drawn into the groove to obtain U a 、U b 、U c As shown in fig. 9.
2. Line voltage of three-phase three lines is made: for three-phase three-wire, according to the result of phasor measurement, selecting corresponding line voltage position hole in the phasor graph protractor for dotting and positioning, for example, the line voltage of an element is determined to be U ab Then corresponding U in the phasor protractor ab The position of the opening is dotted, positioned and marked, so that the actual line voltage of the element can be obtained. The line voltage of the other element is plotted as shown in fig. 10 and 11. For three-phase four-wire, no line voltage need be made.
3. Current drawn for the same element: according to the included angle between the line voltage and the current obtained by measurement, rotating the 0-degree scale of the annular protractor to the line voltage as a starting point of the angle 0-degree, finding the position of the included angle between the line voltage and the current obtained by measurement on the scale of the annular protractor, dotting by a pen, and scribing the point and the circle center to obtain the position and the current phasor of the current. Similarly, the currents of the other elements are made one by one as described above, as shown in fig. 12 and 13.
In summary, the position of the voltage of the three-phase voltage line is solidified by grooving or perforating, so that the drawing can be rapidly performed; the rotatable annular protractor with the scales of 0-359 degrees is used, the starting point of 0 degrees can be adjusted according to different line voltage positions obtained by measurement and judgment, the calculation and conversion of angles required by users are avoided, the difficulty of finding angles is greatly reduced, the convenience of use is improved, and the angular position of the current phasors of the same element is quickly and accurately positioned. The phasor drawing protractor designed by the invention is developed aiming at electric energy metering phasor analysis of an electric power system, and is also suitable for paper written answering scenes in learning and examination rooms, and accurate and rapid phasor drawing is realized by using the protractor.
In the description of the present invention, it should be understood that the terms "middle," "length," "upper," "lower," "front," "rear," "vertical," "horizontal," "inner," "outer," "radial," "circumferential," and the like indicate an orientation or a positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention.
In the present invention, unless expressly stated or limited otherwise, a first feature "on" a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. The meaning of "a plurality of" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The above description is for the purpose of illustrating the embodiments of the present invention and is not to be construed as limiting the invention, but is intended to cover all modifications, equivalents, improvements and alternatives falling within the spirit and principles of the invention.
Claims (7)
1. The phasor drawing protractor is characterized by comprising a round chassis and an annular protractor, wherein the round chassis and the annular protractor are matched for use;
the circular chassis is of a disc structure with an outer ring provided with a groove, and the groove is nested with the annular protractor; the circular chassis evenly distributes three phase voltage lines around the circle center, the phase voltage lines are provided with through grooves, the circular chassis evenly distributes six line voltage lines around the circle center, and the line voltage lines are provided with a series of through holes; the phase voltage line is spaced 30 ° from the adjacent line voltage line;
the annular protractor is of a hollow middle circular ring structure, lines and angle marks are engraved on the annular protractor along the outer ring, a circular ring groove is formed in the bottom surface of a circular ring of the annular protractor, the outer diameter of the circular ring groove is larger than that of the circular chassis, the size of a concave part of the annular protractor is matched with that of the inner groove of the circular chassis, the width of the circular ring groove of the annular protractor is 2-3mm, and the width of the groove of the disc base is not less than 3mm, so that the groove can be nested into the outer ring of the circular chassis and can rotate smoothly; a rotatable ring protractor with a scale of 0 to 359 degrees is used, and the starting point of 0 degrees is adjusted according to different line voltage positions obtained by measurement judgment.
2. The phasor plot protractor according to claim 1, wherein the circular chassis is imprinted with a dashed line that assists in the patterning, the dashed line comprising: and connecting adjacent phase voltage lines and line voltage lines, connecting opposite extension lines of the phase voltage lines and the line voltage lines, and connecting adjacent line voltage lines and line voltage lines, wherein the circle center of the circular chassis is used as the circle center, and the length of the phase voltage lines is used as the circle with the radius.
3. The phasor plot protractor according to claim 2, wherein the through slot is a trapezoidal slot, the through slot being provided with rounded corners; the through holes are trapezoid holes, and round corners are arranged on the through holes.
4. A phasor plot protractor according to claim 3, wherein the circular chassis is imprinted with indicia around the through slot locations, the three indicia being of different colours.
5. The phasor-plot protractor according to claim 2, wherein the outer edge of the annular protractor is a beveled structure.
6. The phasor plot protractor according to claim 4 or 5, wherein the circular chassis and the annular protractor are of transparent material.
7. A phasor plot protractor according to claim 3, wherein the groove width is greater than the circular groove width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111466227.1A CN114184822B (en) | 2021-12-03 | 2021-12-03 | Phasor drawing protractor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111466227.1A CN114184822B (en) | 2021-12-03 | 2021-12-03 | Phasor drawing protractor |
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| CN114184822A CN114184822A (en) | 2022-03-15 |
| CN114184822B true CN114184822B (en) | 2024-01-12 |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114487919B (en) * | 2022-04-15 | 2022-07-01 | 石家庄科林电气股份有限公司 | Self-adaptive method for wiring mode of three-phase electric energy meter |
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