Motor control schematic diagram drawing tool

Abstract

The utility model discloses a tool for drawing a motor control schematic diagram, which is made of a PVC (polyvinyl chloride) transparent thin plate, and a plurality of hollows for electrical symbols of the motor control schematic diagram are arranged on the PVC transparent thin plate. The plurality of hollows at least comprise a fuse (three-phase) wire frame, a main circuit normally-open first contact (three-phase) wire frame, a thermal relay coil square frame, a thermal relay coil (three-phase) wire frame, a motor wire frame, a coil wire frame, a normally-closed electric shock wire frame, a circuit breaker operating mechanism wire frame, a fuse wire frame and a main circuit normally-open second contact (three-phase) wire frame; and the control circuit normally-open contact wire frame and the control circuit normally-open second contact wire frame are used for drawing electrical symbols of the main circuit and the control circuit. According to the utility model, during the drawing process, the design of the transparent thin plate can facilitate the arrangement of electrical symbol positions and circuit connection, thereby realizing the rapid drawing of the motor control schematic diagram.

Description

Technical Field

[0001] The utility model relates to the technical field of drawing tools, in particular to a motor control principle diagram drawing tool. Background Art

[0002] In daily work, we are required to design and draw motor control schematics that meet the corresponding functions in a relatively short time. Common motor control schematics generally expand the corresponding functions based on schematics such as motor start, protection and stop, motor forward and reverse rotation, and motor star-delta starting. Motor control schematics generally include electrical symbols such as circuit breaker normally open contacts, contactor coils and contacts, thermal relay coils and contacts, fuses, motors, pushbutton contacts, relay coils and contacts. The corresponding symbols are combined and arranged according to the circuit function requirements and connected with solid lines.

[0003] When manually drawing motor control schematics, especially in electrician professional skills competitions, manual errors can lead to inconsistent shapes and sizes of drawn electrical components and non-compliance with specifications, skewed positions of electrical symbols, connection lines that cannot be horizontal or vertical, unsightly and error-prone circuit diagrams, and long time-consuming schematic drawing. Utility Model Content

[0004] The purpose of the utility model is to provide a motor control principle diagram drawing tool for solving the technical problems in the prior art that manual drawing of motor control principle diagrams is prone to drawing errors and is time-consuming.

[0005] The utility model solves the above problems through the following technical solutions:

[0006] A motor control schematic drawing tool is made of a PVC transparent sheet, on which a number of hollowing-out areas for electrical symbols of the motor control schematic are arranged;

[0007] Several of the hollowings include at least a fuse (three-phase) wire frame, a main circuit normally open first contact (three-phase) wire frame, a thermal relay coil square frame, a thermal relay coil (three-phase) wire frame, a motor wire frame, a coil wire frame, a normally closed contact wire frame, a circuit breaker operating mechanism wire frame, a fuse wire frame, a main circuit normally open second contact (three-phase) wire frame, a control circuit normally open contact wire frame, and a control circuit normally open second contact wire frame, which are used to draw electrical symbols for the main circuit and the control circuit.

[0008] As a further improvement, the drawing tool is rectangular in shape and 2 mm in thickness.

[0009] As a further improvement, the fuse (three-phase) wire frame is composed of three hollow rectangles arranged longitudinally and arranged in rows.

[0010] As a further improvement, the main circuit normally open first contact (three-phase) wire frame, the main circuit normally open second contact (three-phase) wire frame, the control circuit normally open contact wire frame and the control circuit normally open second contact wire frame are all composed of several normally open contact frames, and the several normally open contact frames are arranged in rows.

[0011] As a further improvement, the normally open contact frame is formed by connecting one side of the triangle with the left side of the rectangle.

[0012] As a further improvement, the thermal relay coil square frame, coil wire frame, circuit breaker operating mechanism wire frame and fuse wire frame are each composed of a rectangular hollow of different sizes.

[0013] As a further improvement, the thermal relay coil (three-phase) wire frame is composed of thermal relay coils with directional grooves on the left side of the rectangle, and the thermal relay coils are arranged in rows.

[0014] As a further improvement, the motor wire frame is formed by a circular hollowing.

[0015] As a further improvement, the normally closed contact wire frame is composed of a normally closed contact frame formed by connecting two triangular sides on the right side of a rectangle.

[0016] As a further improvement, the cutouts enlarge and offset the electrical symbols to the hand-drawn line size.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0018] This utility model can quickly draw motor control schematics. For common start-stop, forward-reverse, and star-delta starting circuits, electrical symbols can be quickly drawn based on the hollowing of the thin plate on the drawing tool. The corresponding positions of the fuse three-phase contacts, contactor normally open contacts, thermal relay coils, and motor symbols for the main circuit have been designed based on the positions of common motor control schematics and can be drawn in one go. For the extension part and control circuit, the thin plate can be moved to the corresponding position according to the corresponding requirements to quickly draw the line connection using the rectangular frame part. During the drawing process, the design of the transparent thin plate facilitates the arrangement of electrical symbol positions and line connection, thereby achieving rapid drawing of the motor control schematic, with consistent size and shape of electrical symbols and beautiful line connections that meet specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional diagram of a motor control schematic drawing tool according to the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of a motor control schematic drawing tool of the utility model;

[0021] Figure 3 This is a motor control principle diagram of the utility model.

[0022] Figure markings: 1. Fuse (three-phase) wire frame; 2. Main circuit normally open first contact (three-phase) wire frame; 3. Thermal relay coil square frame; 4. Thermal relay coil (three-phase) wire frame; 5. Motor wire frame; 6. Coil wire frame; 7. Normally closed contact wire frame; 8. Circuit breaker operating mechanism wire frame; 9. Fuse wire frame; 10. Main circuit normally open second contact (three-phase) wire frame; 11. Control circuit normally open contact wire frame; 12. Control circuit normally open second contact wire frame. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Example:

[0025] Combined with attachment Figure 1-3 As shown, a motor control schematic drawing tool is made of a transparent PVC sheet, preferably rectangular in shape and 2mm thick. The PVC sheet has several cutouts for common electrical symbols in motor control schematics. These cutouts include wireframes for the main circuit's three-phase circuit breaker's normally open contacts, fuses, three-phase contactor's normally open contacts, thermal relay's three-phase coils, and corresponding electrical symbols for the motor; and for the control circuit's normally open contacts, normally closed contacts, coils, fuses, and other corresponding electrical symbols. The cutouts are arranged according to the positions of electrical symbols for common circuits in motor control schematics, such as forward and reverse rotation, and star-delta.

[0026] Specifically, a motor control schematic drawing tool is provided, on which the hollowing out respectively forms: a fuse (three-phase) wire frame 1, a main circuit normally open first contact (three-phase) wire frame 2, a thermal relay coil square frame 3, a thermal relay coil (three-phase) wire frame 4, a motor wire frame 5, a coil wire frame 6, a normally closed contact wire frame 7, a circuit breaker operating mechanism wire frame 8, a fuse wire frame 9, a main circuit normally open second contact (three-phase) wire frame 10, a control circuit normally open contact wire frame 11, a control circuit normally open second contact wire frame 12, etc., so that the electrical graphic symbols in the motor control schematic diagram can be drawn through the hollowing out of several wire frames, so as to achieve the purpose of drawing the motor control schematic diagram quickly and accurately.

[0027] The fuse (three-phase) wireframe 1 consists of three rectangular hollow sections arranged longitudinally and arranged in rows. The main circuit normally open first contact (three-phase) wireframe 2, the main circuit normally open second contact (three-phase) wireframe 10, the control circuit normally open contact wireframe 11, and the control circuit normally open second contact wireframe 12 are each composed of normally open contact frames formed by connecting one side of a triangle on the left side of a rectangle. The main circuit normally open first contact (three-phase) wireframe 2, the main circuit normally open second contact (three-phase) wireframe 10, and the control circuit normally open second contact wireframe 12 each consist of three normally open contact frames arranged in a row, while the control circuit normally open contact wireframe 11 consists of two normally open contact frames arranged in a row. The thermal relay coil frame 3 consists of a horizontal rectangular hollow section. The thermal relay coil (three-phase) wireframe 4 consists of thermal relay coils with directional grooves on the left side of the rectangle. The thermal relay coils are arranged in rows. The motor wireframe 5 consists of a circular hollow section. The coil wire frame 6, the circuit breaker operating mechanism wire frame 8, and the fuse wire frame 9 are each formed by a hollowed-out rectangle of different sizes. The normally closed contact wire frame 7 is formed by a normally closed contact frame formed by connecting two triangular sides on the right side of the rectangle.

[0028] Preferably, the hollowed-out portion of the transparent thin plate of the present invention is composed of the above-mentioned electrical graphic symbol wire frame. The transparent thin plate is hollowed out according to the shape of the electrical graphic symbols in the "National Standard Compilation of Electrical Drawings and Graphic Symbols", and the symbols are enlarged and offset with a hand-drawn line size of 0.7mm so that the drawn line size is consistent with the required size of the "National Standard Compilation of Electrical Drawings and Graphic Symbols".

[0029] Optionally, the hollow shapes of the main circuit normally open first contact (three-phase) wire frame 2, the thermal relay coil (three-phase) wire frame 4, the main circuit normally open second contact (three-phase) wire frame 10, the control circuit normally open contact wire frame 11, and the control circuit normally open second contact wire frame 12 are drawn according to the lines on the left; the hollow shape of the normally closed contact wire frame 7 is drawn according to the lines on the right, and the hollow shapes of the fuse (three-phase) wire frame 1, the thermal relay coil frame 3, the motor wire frame 5, the coil wire frame 6, the circuit breaker operating mechanism wire frame 8, and the fuse wire frame 9 are drawn according to all the hollow lines.

[0030] When manually drawing the motor control principle diagram, refer to the attached Figure 3 , draw the attached Figure 3When drawing the motor forward and reverse motor control schematic diagram, place the drawing tool horizontally and use the main circuit normally open first contact (three-phase) wire frame 2 to draw the main circuit QS circuit breaker graphic symbol. Place the drawing tool vertically and use the fuse (three-phase) wire frame 1 to draw the main circuit FU1 fuse graphic symbol. Use the main circuit normally open first contact (three-phase) wire frame 2 and the main circuit normally open second contact (three-phase) wire frame 10 to draw the main circuit KM1 and KM2 main contact graphic symbols. Use the thermal relay coil box 3 and the thermal relay coil (three-phase) wire frame 4 to draw the main circuit FR thermal relay coil graphic symbol. Use the motor wire frame 5 to draw the main circuit motor graphic symbol. Use the fuse wire frame 9 to draw the control circuit FU2 fuse graphic symbol. Use the fuse (three-phase) ) Use wire frame 1 and wire frame 12 of the normally open second contact of the control circuit to draw the normally open contact graphic symbols of the control circuit SB1, SB2, KM1, and KM2. Use wire frame 7 of the normally closed contact to draw the normally closed contact graphic symbols of the control circuit FR, SB0, KM1, and KM2. Use wire frame 6 to draw the coil graphic symbols of the control circuit KM1 and KM2. Finally, use a rectangular border to connect each graphic symbol and draw the circuit connection lines. During the drawing process, the drawing tool can be flexibly moved according to the position of the electrical graphic symbol, so as to quickly hand-draw the motor control schematic.

[0031] This utility model can quickly draw motor control schematics. For common start-stop, forward-reverse, and star-delta starting circuits, electrical symbols can be quickly drawn based on the hollowing of the thin plate on the drawing tool. The corresponding positions of the fuse three-phase contacts, contactor normally open contacts, thermal relay coils, and motor symbols for the main circuit have been designed based on the positions of common motor control schematics and can be drawn in one go. For the extension part and control circuit, the thin plate can be moved to the corresponding position according to the corresponding requirements to quickly draw the line connection using the rectangular frame part. During the drawing process, the design of the transparent thin plate facilitates the arrangement of electrical symbol positions and line connection, thereby achieving rapid drawing of the motor control schematic, with consistent size and shape of electrical symbols and beautiful line connections that meet specifications.

[0032] Although the present invention is described herein with reference to the illustrative embodiments of the present invention, the above embodiments are merely preferred embodiments of the present invention, and the embodiments of the present invention are not limited to the above embodiments. It should be understood that those skilled in the art can design many other modifications and implementations, which will fall within the scope and spirit of the principles disclosed in this application.

Claims

1. A motor control schematic drawing tool, characterized in that: It is made of a piece of transparent PVC sheet, on which several hollows are set for the electrical symbols of the motor control schematic diagram; Several of the hollowings include at least a fuse (three-phase) wire frame, a main circuit normally open first contact (three-phase) wire frame, a thermal relay coil square frame, a thermal relay coil (three-phase) wire frame, a motor wire frame, a coil wire frame, a normally closed contact wire frame, a circuit breaker operating mechanism wire frame, a fuse wire frame, a main circuit normally open second contact (three-phase) wire frame, a control circuit normally open contact wire frame, and a control circuit normally open second contact wire frame, which are used to draw electrical symbols for the main circuit and the control circuit.

2. A motor control schematic drawing tool according to claim 1, characterized in that: The drawing tool is rectangular in shape and 2 mm thick.

3. The motor control schematic drawing tool according to claim 1, characterized in that: The fuse (three-phase) wire frame is composed of three hollow rectangles arranged longitudinally and arranged in rows.

4. The motor control schematic drawing tool according to claim 1, characterized in that: The main circuit normally open first contact (three-phase) wire frame, the main circuit normally open second contact (three-phase) wire frame, the control circuit normally open contact wire frame and the control circuit normally open second contact wire frame are all composed of several normally open contact frames, and the several normally open contact frames are arranged in rows.

5. A motor control principle diagram drawing tool according to claim 4, characterized in that: The normally open contact frame is formed by connecting the left side of a rectangle to one side of a triangle.

6. A motor control schematic drawing tool according to claim 1, characterized in that: The thermal relay coil square frame, coil wire frame, circuit breaker operating mechanism wire frame and fuse wire frame are each composed of a rectangular hollow with different sizes.

7. A motor control schematic drawing tool according to claim 1, characterized in that: The thermal relay coil (three-phase) wire frame is composed of thermal relay coils with directional grooves on the left side of the rectangle, and the thermal relay coils are arranged in rows.

8. The motor control principle diagram drawing tool according to claim 1, characterized in that: The motor wire frame is formed by circular hollowing.

9. The motor control principle diagram drawing tool according to claim 1, characterized in that: The normally closed contact wire frame is composed of a normally closed contact frame formed by connecting two triangles on the right side of the rectangle.

10. A motor control schematic drawing tool according to any one of claims 1 to 9, characterized in that: The cutout enlarges and offsets the electrical symbol by the hand-drawn line size.

Images