CN211506887U

CN211506887U - Heat conduction experiment demonstration instrument

Info

Publication number: CN211506887U
Application number: CN201922254613.9U
Authority: CN
Inventors: 刘时友
Original assignee: Tan Shuangfeng
Current assignee: Tan Shuangfeng
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-09-15
Anticipated expiration: 2029-12-16

Abstract

The utility model relates to the technical field of experimental teaching demonstration instruments, in particular to a heat conduction experimental demonstration instrument, which comprises a demonstration pedestal and a stand column, copper sheet and heating device, demonstration pedestal upper surface are equipped with N electron thermometer and N bulb, and demonstration pedestal upper surface still is equipped with temperature controller master switch and electron thermometer master switch, and the copper sheet uses the connecting hole as the center, and the equidistance is equipped with N to the aperture, and the N aperture of the left side rectangle strip of copper sheet is equipped with the temperature controller, and the N aperture of the right side rectangle strip of copper sheet is equipped with the electron thermometer probe, and heating device's upper end is passed the connecting hole with the copper sheet is connected, the lower extreme with the demonstration pedestal is connected, coats the printing ink material that discolours on the center circle, and N temperature controller establishes ties with N bulb respectively, connects in parallel with N line after establishing ties, establishes ties with temperature controller master switch after N line is parallelly connected and forms temperature controller group, and temperature controller group and. The utility model discloses a three kinds of modes show that experimental phenomenon verifies how to transmit, and the observation result accuracy is high, and the error is low, and the statistics of being convenient for, the effect is obvious, has effectively improved the efficiency of experiment, resources are saved.

Description

Heat conduction experiment demonstration instrument

Technical Field

The utility model relates to a teaching demonstration appearance technical field, concretely relates to heat-conduction experiment demonstration appearance.

Background

The classic research experimental design of teaching materials (I) is that a match is stuck on a section of iron wire at regular intervals by wax, and one end of the iron wire is heated by an alcohol lamp. Observe which end of the match falls first. The second experimental design is that the center of a metal wafer coated with wax is heated, the melting condition of the wax is observed, and the heat transfer direction and the heat transfer process are estimated. 1, more equipment is prepared in the experimental operation process; 2. in the experiment, the difficulty of sticking the match on the iron wire by using wax is large, and the consumed time is long; 3. students cannot visually see the heat transfer process and presume conclusions according to phenomena; 4. the experimental procedure failed with little caution.

Disclosure of Invention

In view of the technical problem that exists among the prior art, the utility model provides a heat-conduction experiment demonstration appearance has solved that the experiment in-process equipment is many, and the degree of difficulty is big in the experiment, long problem consuming time.

In order to realize the technical purpose, the utility model discloses a technical scheme as follows: the heat conduction experiment demonstration instrument comprises a demonstration pedestal, a stand column, a copper sheet and a heating device, wherein the stand column is arranged on one side of the demonstration pedestal, N electronic thermometers and N bulbs are arranged on the upper surface of the demonstration pedestal, and a temperature controller main switch and an electronic thermometer main switch are further arranged on the upper surface of the demonstration pedestal;

one side of the copper sheet is fixedly connected with the stand column, a connecting hole is formed in the center of the copper sheet, the copper sheet comprises a central disk with the connecting hole and a left rectangular strip and a right rectangular strip, the two rectangular strips are symmetrically arranged on two sides of the connecting hole, a thermosensitive color-changing ink material is coated in the center of the copper sheet, the connecting hole is used as the center on the left rectangular strip and the right rectangular strip of the copper sheet, N pairs of small holes are formed in the left rectangular strip and the right rectangular strip of the copper sheet at equal intervals, temperature controllers are arranged in the N small holes in the left rectangular strip of the copper sheet and are fixed on the copper sheet through screws, electronic thermometer probes are arranged in the N small holes in the right rectangular strip of the copper sheet and are fixed on the copper sheet through screws, the upper end of the heating device penetrates through the connecting hole to be connected with, the temperature controller with the bulb corresponds the setting, the electron thermometer probe with the electron thermometer corresponds the setting, N individual temperature controller establishes ties with N individual bulb respectively, and connects with the wire, connects N lines parallelly connected after establishing ties, N lines parallelly connected after with the temperature controller master switch establishes ties and forms temperature controller group, N individual electron thermometer probe establishes ties with N individual electron thermometer respectively, and connects with the wire, connects N lines parallelly connected after establishing ties, N lines parallelly connected after with the electron thermometer master switch establishes ties and forms electron thermometer group, temperature controller group with electron thermometer group connects with the wire electricity for external power source after parallelly connected, heating device is connected with the wire electricity for the power.

Adopt above-mentioned technical scheme's heat-conduction experiment demonstration appearance, owing to design with the form of circuit, utilize electric iron and temperature controller and electron thermometer probe, when temperature controller and electron thermometer probe experienced the heat, with the load switch-on, let students can audio-visual observation change result.

It is further defined that the electronic thermometer and the light bulb are arranged side by side on the demonstration stand, the definition being such that the sequential light-off of the light bulb and the temperature on the electronic thermometer can be visually observed.

Further limiting, the two rectangular strips are 30cm in length and 4cm in width, the central disk 21 is a disk with the connecting hole 22 as the center and 10cm in diameter, the rectangular strips are respectively provided with N pairs of small holes with the diameter of 0.3cm by taking the connecting hole 22 as the center and 3cm in distance

The voltage of the temperature controller group and the electronic thermometer group which are connected in parallel and then electrically connected with an external power supply is 6V, and the limitation is that the voltage meets the specifications of circuit elements of the temperature controller group and the electronic thermometer group.

Further, the voltage of the heating device electrically connected with the power supply is 220V, and the limitation is that the voltage meets the specification of the electric soldering iron.

Further, the heating device is an electric soldering iron.

Further, the demonstration pedestal is provided with a fixing frame, and the fixing frame is used for reinforcing and fixing the heating device.

The utility model discloses compare in prior art, do an experiment, three kinds of modes show that experimental phenomenon verifies how to transmit, firstly: the bulbs are orderly on and off; secondly, the temperature of each block is measured by an electronic thermometer; thirdly, the method comprises the following steps: color change of the color changing ink material; the three phenomena of temperature transfer direction is clear at a glance, the accuracy of observation results is high, the error is low, statistics is convenient, the effect is obvious, the efficiency of the experiment is effectively improved, the experiment becomes abstract and visual, the cognitive characteristics of pupils are better met, the experiment materials can be repeatedly used, resources are saved, the experiment can become cyclic resources, novel scientific materials are fully used, the experiment is continuously improved, the classroom can be highly efficient, and the interest and innovation spirit of scientific research of students can be stimulated.

Drawings

FIG. 1 is a schematic view of a heat conduction experiment demonstration instrument of the present invention;

FIG. 2 is a schematic circuit diagram of a temperature controller group and an electronic thermometer group in the heat conduction experiment demonstration instrument of the present invention;

FIG. 3 is a schematic circuit diagram of an electric iron in the heat conduction experiment demonstration instrument of the present invention;

the corresponding labels in the figures are: 1-demonstration pedestal, 2-copper sheet, 3-heating device, 4-temperature controller, 5-electronic thermometer probe, 11-upright post, 21-central disk, 22-connecting hole, 31-fixing frame, 41-temperature controller main switch, 42-bulb, 51-electronic thermometer main switch and 52-electronic thermometer.

Detailed Description

In order to make the technical solution of the present invention more comprehensible to those skilled in the art, the present invention is further described with reference to the accompanying drawings and examples.

The heat conduction experiment demonstration instrument shown in fig. 1, fig. 2 and fig. 3 comprises a demonstration pedestal 1, a vertical column 11, a copper sheet 2 and a heating device 3, wherein the vertical column 11 is arranged on one side of the demonstration pedestal 1, N electronic thermometers and N bulbs are arranged on the upper surface of the demonstration pedestal 1, and a temperature controller main switch 41 and an electronic thermometer main switch 51 are further arranged on the upper surface of the demonstration pedestal 1; one side of the copper sheet 2 is fixedly connected with the upright post 11, a connecting hole 22 is arranged at the center of the copper sheet 2, the copper sheet 2 comprises a central disk 21 with the connecting hole 22 and a left rectangular strip and a right rectangular strip, the two rectangular strips are symmetrically arranged at the two sides of the connecting hole 22, the center of the copper sheet 2 is coated with a thermosensitive color-changing ink material, the left rectangular strip and the right rectangular strip of the copper sheet 2 are provided with N pairs of small holes at equal intervals by taking the connecting hole 22 as the center, the N small holes on the left rectangular strip of the copper sheet 2 are all provided with a temperature controller 4 and are fixed on the copper sheet 2 through screws, the N small holes on the right rectangular strip of the copper sheet 2 are all provided with an electronic thermometer probe 5 and are fixed on the copper sheet 2 through screws, the upper end of the heating device 3 passes through the connecting hole 22 to be connected with, 3 lower extremes of heating device are located the below of center disc 21, temperature controller 4 with bulb 42 corresponds the setting, electron thermometer probe 5 with electron thermometer 52 corresponds the setting, N temperature controller establishes ties with N bulb respectively, and connects with the wire, connects N lines parallelly after establishing ties, N lines parallelly after parallelly connecting with the temperature controller master switch establishes ties and forms temperature controller group, N electron thermometer probe establishes ties with N electron thermometers respectively, and connects with the wire, connects N lines parallelly after establishing ties, N lines parallelly after parallelly connecting with electron thermometer master switch establishes ties and forms electron thermometer group, temperature controller group with electron thermometer group connects with the wire electricity for external power supply after parallelly connecting, heating device (3) are connected with the wire electricity for the power and are connected

The electronic thermometer 5 and the lamp 42 are arranged side by side,

the two rectangular strips are 30cm in length and 4cm in width, the central disc 21 is a disc which takes the connecting hole 22 as the center of a circle and is 10cm in diameter, the rectangular strips take the connecting hole 22 as the center, and five pairs of small holes with the diameter of 0.3cm are respectively punched at the interval of 3 cm. The voltage of the temperature controller group and the voltage of the electronic thermometer group which are connected in parallel and then electrically connected with an external power supply is 6V, and the voltage of the heating device 3 which is electrically connected with the power supply is 220V. The heating device 3 is an electric soldering iron, a fixing frame 31 of the electric soldering iron is arranged on the demonstration pedestal 1, and the electric soldering iron is reinforced by the fixing frame.

The temperature controller is used for generating physical deformation in the switch according to the temperature change of a working environment so as to generate certain special effects and generate a series of automatic control elements for conducting or disconnecting actions; the temp. probe mainly includes bimetal thermometer, expansion liquid pressure thermometer, quartz crystal sensor, non-contact radiation temp. sensor and RTD temp. sensor, in which the bimetal thermometer is an indicator formed from metal sheet with different temp. expansion coefficients and connecting rod gear system for measuring temp., and the expansion liquid pressure thermometer is a volatile liquid, and is heated and evaporated to produce pressure, and said pressure can be transferred into indicator by means of capillary tube.

Firstly, a temperature controller, an electronic thermometer probe, a bulb, an electronic thermometer, a temperature controller main switch and an electronic thermometer main switch are connected in a circuit, an electric iron passes through a connecting hole, the upper end of the electric iron is connected with a central disc 21 of a copper sheet, an electric soldering iron is fixed on a demonstration pedestal, the lower end of the electric soldering iron is placed below the central disc 21, then the electric soldering iron is clamped by a fixing frame to reinforce the electric soldering iron, the circuit is connected, the switch of a power supply is closed, after the electric soldering iron is connected, the electric soldering iron is heated to heat a thermosensitive color-changing ink material on the central disc 21, the color of the ink material is changed from deep to light after the ink material is heated, after the electric soldering iron is continuously heated, heat is transferred from the central disc 21 to two sides of the copper sheet, the temperature controller main switch and the electronic thermometer main switch, switch on load, the bulb is by the center to the outside in proper order bright, electronic thermometer shows the temperature by the center to the outside, the temperature size is reduced by the center to the outside in proper order, let the process that the student can audio-visual observation experiment, the data of record experiment, the process of analysis heat transfer, the electric iron no longer continues the heating back, the heat slowly gives off, after temperature controller and electronic thermometer do not experience the heat, the disconnection load, the bulb is extinguish by outside to the center in proper order, electronic thermometer also by outside no longer shows the temperature to the center, the thermochromic printing ink material of copper sheet center disc is by white recovery to black.

It is right above the utility model provides a heat-conduction experiment demonstration appearance has carried out the detailed introduction, and the description of specific embodiment is only used for helping understanding the utility model discloses a method and core thought thereof. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. Heat-conduction experiment demonstration appearance, its characterized in that: the demonstration device comprises a demonstration pedestal (1), a stand column (11), a copper sheet (2) and a heating device (3), wherein the stand column (11) is arranged on one side of the demonstration pedestal (1), N electronic thermometers and N bulbs are arranged on the upper surface of the demonstration pedestal (1), and a temperature controller main switch (41) and an electronic thermometer main switch (51) are further arranged on the upper surface of the demonstration pedestal (1); one side of the copper sheet (2) is fixedly connected with the upright post (11), a connecting hole (22) is formed in the center of the copper sheet (2), the copper sheet (2) comprises a center disk (21) with the connecting hole (22) and a left rectangular strip and a right rectangular strip, the two rectangular strips are symmetrically arranged on two sides of the connecting hole (22), a thermosensitive color-changing ink material is coated in the center of the copper sheet (2), the connecting hole (22) is used as the center on the left rectangular strip and the right rectangular strip of the copper sheet (2), N pairs of small holes are formed at equal intervals, a temperature controller (4) is arranged in each of N small holes in the left rectangular strip of the copper sheet (2) and is fixed on the copper sheet (2) through screws, an electronic thermometer probe (5) is arranged in each of N small holes in the right rectangular strip of the copper sheet (2) and is fixed on the copper sheet (2) through screws, the upper end of the heating device (3) penetrates through the connecting hole (22) to, the lower end of the heating device (3) is connected with the demonstration pedestal (1) and is positioned below the central disk (21), the temperature controller (4) is arranged corresponding to the bulb (42), the electronic thermometer probe (5) is arranged corresponding to the electronic thermometer (52), the N temperature controllers are respectively connected with the N bulbs in series, and are connected by a lead, N lines are connected in parallel after being connected in series, the N lines are connected in parallel and then connected in series with the main switch of the temperature controller to form a temperature controller group, the N electronic thermometer probes are respectively connected in series with the N electronic thermometers, and are connected by a lead, N lines are connected in parallel after being connected in series, the N lines are connected in parallel and then connected in series with the electronic thermometer main switch to form an electronic thermometer group, the temperature controller group and the electronic thermometer group are connected in parallel and then are electrically connected with an external power supply through a lead, and the heating device (3) is electrically connected with a power supply through a lead.

2. The heat conduction experimental demonstration instrument according to claim 1, wherein: the electronic thermometer (52) and the bulb (42) are arranged side by side.

3. The heat conduction experimental demonstration instrument according to claim 1, wherein: the two rectangular strips are 30cm in length and 4cm in width, the central disc (21) is a disc which takes the connecting hole (22) as the center of a circle and is 10cm in diameter, the rectangular strips take the connecting hole (22) as the center, and N pairs of small holes with the diameter of 0.3cm are respectively punched at the interval of 3 cm.

4. The heat conduction experimental demonstration instrument according to claim 1, wherein: the temperature controller group and the electronic thermometer group are connected in parallel and then are electrically connected with an external power supply, and the voltage is 6V.

5. The heat conduction experimental demonstration instrument according to claim 1, wherein: the voltage of the heating device (3) electrically connected with a power supply is 220V.

6. The heat conduction experimental demonstration instrument according to claim 1, wherein: the heating device (3) is an electric iron.