CN220962636U

CN220962636U - Electric energy conveying demonstration teaching board

Info

Publication number: CN220962636U
Application number: CN202323062012.0U
Authority: CN
Inventors: 王宝新; 袁林艳
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-11-14
Filing date: 2023-11-14
Publication date: 2024-05-14
Anticipated expiration: 2033-11-14

Abstract

The utility model belongs to the technical field of teaching aids, and discloses an electric energy transmission demonstration teaching board which comprises a backboard with a circuit A and a circuit B, wherein the circuit A comprises a wiring seat A, the wiring seat A is connected with a slide rheostat A and a single-pole double-throw switch, the single-pole double-throw switch is connected with a wire II and a wire III, the slide rheostat A is connected with an indicator A, the indicator A is connected with the right ends of the wire I, the wire II and the wire III, the left end of the wire I is connected with a wiring clamp, the wire I and the wire II are made of the same materials, the radius of the wire II and the radius of the wire III are the same and the resistivity of the wire III are different, and the circuit B comprises a wiring seat B, a step-up transformer, a step-down transformer and an indicator B, and the wire IV is the same as the wire II. The utility model can control variables in three directions of transmission distance, wire resistivity and wire cross-sectional area, simulate high-voltage transmission, and is helpful for teachers and students to explore a method for reducing transmission loss, simulate long-distance high-voltage transmission and learn related theoretical contents.

Description

Electric energy conveying demonstration teaching board

Technical Field

The utility model belongs to the technical field of teaching aids, and particularly relates to an electric energy transmission demonstration teaching board.

Background

The high school physics teaching material is only theoretical analysis on 'electric energy transmission', the laboratory also does not have special experimental equipment for the part, and the following defects exist in actual teaching: 1. students have difficulty in understanding the circuit structure of remote power transmission; it is difficult to distinguish between concepts such as voltage (transmission voltage, loss voltage, and customer voltage), power (transmission power, loss power, and customer derived power), and the like. 2. The magnitude of the transmission loss is invisible and untouchable, and theoretical analysis of "reduced transmission loss" lacks powerful experimental evidence. 3. High voltage transmission is a realistic sensation that is lacking for high school students.

Disclosure of utility model

In order to overcome the technical problems, the utility model provides the electric energy transmission demonstration teaching board which is convenient for students to operate by hands and intuitively learn and understand electric energy transmission.

The utility model adopts the following technical scheme:

the utility model provides an electric energy transport demonstration teaching board, includes the backplate, the face of backplate is provided with circuit first and circuit second, circuit first includes the connection terminal first, slide rheostat first and single pole double throw switch are connected to the connection terminal first, single pole double throw switch connects the left end of wire second and wire third, slide rheostat first connects the indicator first, the right-hand member of wire second and wire third is connected to the indicator first, the binding clip is connected to the left end of wire first, wire first and wire second materials are the same, wire second and wire third radius are the same and wire second resistivity is greater than wire third, circuit second includes the connection terminal second, step-up transformer is connected to the connection terminal second, step-up transformer connects wire fourth and slide rheostat second, wire fourth and slide rheostat second are connected step-down transformer, step-down transformer connects the indicator second, wire fourth and wire second are the same, step-up transformer and step-down transformer's conversion ratio reciprocal.

Preferably, the second wire and the fourth wire adopt a single fine furnace wire, the first wire adopts a plurality of furnace wires connected in parallel or a single thick furnace wire, and the third wire adopts a single fine copper wire.

Preferably, the indicator A and the indicator B adopt bulbs with the same specification.

Preferably, the first, second, third and fourth wires have the same length.

Compared with the prior art, the utility model has the beneficial effects that:

According to the utility model, the circuit A and the circuit B are arranged on the surface of the backboard, and the circuit A can control variables in three directions of the conveying distance, the resistivity of the power transmission line and the cross section area of the power transmission line so as to perform a comparison test and help students to intuitively learn and understand the influence of the three variables on the power transmission electric energy loss; step-up and step-down are carried out on the circuit B, high-voltage transmission is simulated, so that a comparison experiment with the transmission voltage as a variable is formed with the circuit A, and the electric energy loss condition of the transmission line when the transmission voltage is the variable is intuitively seen; the method is helpful for teachers and students to explore a method for reducing power transmission loss and simulate long-distance high-voltage power transmission and learn related theoretical contents.

Drawings

Fig. 1 is a schematic overall view of the present utility model.

Reference numerals illustrate:

1, a backboard; 2, a wiring seat I; 3, jointing clamps; 4, a single-pole double-throw switch; 5 sliding rheostat A; 6, conducting wire I; 7, conducting wires II; 8, conducting wires III; 9, conducting wires IV; 10 indicator a; 11 wiring seat B; a step-up transformer 12; 13 a slide rheostat B; a step-down transformer 14; 15 indicator b.

Detailed Description

Embodiments of the present utility model will be described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout, and wherein the raw materials and equipment employed, unless otherwise specified, are commercially available or commonly used in the art, and wherein the methods of the embodiments, unless otherwise specified, are conventional in the art. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

Referring to fig. 1, an electric energy transmission demonstration teaching board comprises a back board 1, wherein a circuit A and a circuit B are arranged on the board surface of the back board 1, the circuit A comprises a wire holder A2, two circuits of the wire holder A2 are respectively connected with a slide rheostat A5 (50Ω, 1.5A) and a single-pole double-throw switch 4, the single-pole double-throw switch 4 is connected with the left ends of a second wire 7 and a third wire 8, the slide rheostat A5 is connected with an indicator A10, the indicator A10 is connected with the right ends of a first wire 6, a second wire 7 and a third wire 8, the left end of the first wire 6 is connected with a jointing clamp 3, the first wire 6 and the second wire 7 are the same in material, the radius of the second wire 7 is the same as that of the third wire 8, the resistivity of the second wire 7 is larger than that of the third wire 8, the second circuit comprises a wire holder 11, the wire holder 11 is connected with a step-up transformer 12 (4V-12V), the step-up transformer 12 is connected with a fourth wire 9 and a sliding rheostat 13 (50 omega and 1.5A), the fourth wire 9 and the sliding rheostat 13 are connected with a step-down transformer 14 (12V-4V), the step-down transformer 14 is connected with an indicator 15, the fourth wire 9 is the same as the second wire 7, the transformation ratios of the step-up transformer 12 and the step-down transformer 14 are reciprocal, and the lengths of the first wire 6, the second wire 7, the third wire 8 and the fourth wire 9 are the same; the second wire 7 and the fourth wire 9 adopt single fine furnace wires, the first wire 6 adopts a plurality of furnace wires connected in parallel or single thick furnace wires, and the third wire 8 adopts single fine copper wires; the indicator a 10 and the indicator b 15 use the same specification bulb (2.5V).

An electric energy transmission demonstration teaching board, when in use:

The wiring seat A2 and the wiring seat are connected with a 4V alternating current power supply, and the power transmission loss is judged by means of contrast of brightness of the bulb;

1. explore a method for reducing transmission loss "

(1) The second wire 7 is connected to the circuit A through the single-pole double-throw switch 4, the sliding sheet of the slide rheostat A5 is moved to the right, the length of the resistance wire connected to the circuit of the slide rheostat is increased, and the transmission distance is prolonged. Phenomenon: the bulb darkens. Conclusion: the farther the transmission distance is, the greater the transmission loss is.

(2) The second wire 7 is connected into the circuit A through the single-pole double-throw switch 4, and the jointing clamp 3 is clamped on the switch, so that the first wire 6 is connected into the circuit in parallel, and the cross section area of the power transmission line is increased. Phenomenon: the bulb becomes bright. Conclusion: increasing the cross-sectional area of the transmission line reduces transmission losses.

(3) The second wire 7 is connected into the circuit A through the single-pole double-throw switch 4, the third wire 8 is connected into the circuit A through the single-pole double-throw switch 4, and the furnace wire is changed into a copper wire, so that the resistivity of the power transmission line is reduced. Phenomenon: the bulb becomes bright. Conclusion: reducing the resistivity may reduce the transmission loss.

In the above experiments, the variation of the bulb brightness is not obvious, and it is explained that the method of reducing the power transmission loss by increasing the cross-sectional area of the power transmission line and reducing the resistivity of the power transmission line is very limited.

2. Analog 'long-distance high-voltage power transmission'

The second wire 7 is connected to the first circuit through the single-pole double-throw switch 4, the sliding sheets of the slide rheostat are moved to enable the brightness of the bulb to reach proper brightness, and the sliding sheets of the slide rheostat A5 and the slide rheostat B13 are adjusted to the same position to indicate that the transmission distances of the first circuit and the second circuit are the same. And comparing the brightness of bulbs in the first circuit and the second circuit. Phenomenon: the bulb of the circuit B is obviously brighter. Conclusion: the high-voltage power transmission can effectively reduce the power transmission loss.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many variations, modifications, substitutions and alterations are possible to the above embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. The utility model provides an electric energy transport demonstration teaching board, includes the backplate, its characterized in that, the face of backplate is provided with circuit first and circuit second, circuit first includes connection terminal seat first, slide rheostat first and single pole double throw switch are connected to connection terminal seat first, single pole double throw switch connects the left end of wire second and wire third, slide rheostat first connects indicator first, the right-hand member of wire second and wire third is connected to indicator first, the binding clip is connected to the left end of wire first, wire first and wire second materials are the same, wire second and wire third radius are the same and wire second resistivity is greater than wire third, circuit second includes connection terminal seat second, the connection terminal seat second is connected step-up transformer, step-up transformer connects wire fourth and slide rheostat second, wire fourth and slide rheostat second are connected step-down transformer, step-down transformer connects indicator second, wire fourth and wire are the same, step-up transformer and step-down transformer's transformation ratio reciprocal is the reciprocal.

2. The power transmission demonstration teaching board according to claim 1, wherein the second wire and the fourth wire adopt a single thin wire, the first wire adopts a plurality of wires connected in parallel or a single thick wire, and the third wire adopts a single thin copper wire.

3. The power delivery demonstration teaching board of claim 1, wherein the indicator a and the indicator b are light bulbs of the same specification.

4. The power delivery demonstration teaching board of claim 1, wherein the first, second, third and fourth wires are the same length.