Device convenient for researching influence of liquid convection on heat conduction

Abstract

The utility model discloses a device convenient for studying the influence of liquid convection on heat conduction, which comprises a beaker, the top of the beaker is clamped with a top cover, the top of the top cover is provided with a plurality of first jacks, a connecting rod is arranged in the first jacks in a sliding manner, the bottom end of the connecting rod is fixedly provided with an electric heating wire, and the electric heating wire is connected with the beaker. A binding post is fixedly installed at the top end of the connecting rod, a clamping mechanism is arranged in the top cover, the connecting rod is connected with the top cover through the clamping mechanism, a plurality of second inserting holes are formed in the two sides of the top of the top cover, and temperature sensor probes are arranged in the second inserting holes; when the device is used for carrying out a heat convection experiment, power is supplied to the heating wire through the two temperature sensor probes and the binding post, purified water in the beaker is heated, data are recorded through the temperature sensor probes, the measured data are analyzed, and an experiment conclusion is obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental devices, in particular to a device for facilitating research on the influence of liquid convection on heat conduction. Background Art

[0002] Thermal convection is an important knowledge point in junior high school physics. However, since liquids themselves also have contact heat conduction, and there are many factors that affect the change of liquid temperature in actual operation, the flow inside the liquid is more difficult to control. Therefore, it is difficult to verify and explore "convection can promote the transfer of heat inside the liquid". When heating a cup of water, we can usually only heat it from the bottom or the side wall, so it is difficult for us to compare the difference between convection and no convection.

[0003] At present, the main teaching of this experiment is the phenomenon-level experiment. That is, carbon ink or small spheres with a density close to that of water are added to a beaker, and heated at the bottom of the beaker. Some ink or small spheres can be seen to circulate. However, it is difficult to measure the temperature change quantitatively, because the flame cannot heat different positions inside the water, so it is impossible to construct multiple circulation models for comparison.

[0004] Existing devices for studying the effect of liquid convection on thermal conductivity are specially made of glass containers with square or ring-shaped vertical surfaces to achieve heating of the upper pipes. However, this restricts the structure of the free movement of the water, resulting in the water only being able to move in a circular shape. The heat transfer efficiency is also too far behind that of conventional containers, reducing the persuasiveness. Utility Model Content

[0005] The object of the present invention is to provide a device for studying the effect of liquid convection on heat conduction, so as to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a device for studying the influence of liquid convection on thermal conductivity, comprising a beaker, a top cover is engaged with the top of the beaker, a plurality of first sockets are provided on the top of the top cover, connecting rods are slidably provided inside the plurality of first sockets, a heating wire is fixedly installed on the bottom end of the connecting rod, a terminal is fixedly installed on the top end of the connecting rod, a locking mechanism is provided inside the top cover, the connecting rod is connected to the top cover via the locking mechanism, a plurality of second sockets are provided on both sides of the top of the top cover, and temperature sensor probes are provided inside the second sockets.

[0007] As a further description of the above technical solution: the locking mechanism includes two locking blocks, which are slidably connected to both sides of the inner wall of the first socket, and the ends of the two locking blocks that are away from each other are fixedly installed with a first spring, one end of the first spring is fixedly connected to the inside of the top cover, and a plurality of locking grooves are opened on the side wall of the connecting rod, and the locking grooves are adapted to the locking blocks.

[0008] As a further description of the above technical solution: a plurality of the side walls of the blocking blocks are engaged with a blocking column, a plurality of the blocking columns are fixedly connected to a connecting block at one end away from the blocking block, a plurality of the connecting blocks are fixedly connected to a first connecting rod at the bottom, one end of two of the first connecting rods is fixedly connected to a sliding sheet, the other ends of the two first connecting rods are fixedly connected to a connecting plate, second springs are fixedly installed on the side walls of the two connecting plates, and one end of the two second springs is fixedly connected to the inside of the top cover.

[0009] As a further description of the above technical solution: a through hole is opened on the top of the sliding sheet.

[0010] As a further description of the above technical solution: a rubber ring is fixedly installed on the inner wall of the second plug hole, and a rubber sheet is slidably arranged on the side wall of the temperature sensor probe.

[0011] As a further description of the above technical solution: a mounting plate is fixedly installed on the side wall of the beaker, a telescopic rod is fixedly connected to the top of the mounting plate, a support block is fixedly connected to the top of the telescopic rod, and one end of the support block is engaged with the temperature sensor probe.

[0012] As a further description of the above technical solution: a sealing plug is provided inside the second plug hole away from the temperature sensor probe.

[0013] The utility model provides a device for studying the influence of liquid convection on heat conduction. It has the following beneficial effects: the device can heat water at different heights of the water body, detect the temperature of each layer of the water body, and observe the difference in the inhibition of water convection, which is convenient for experimental operation.

[0014] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0015] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a device proposed by the utility model for studying the effect of liquid convection on heat conduction;

[0017] Figure 2 It is a schematic diagram of the three-dimensional unfolded structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the three-dimensional explosion structure of the utility model;

[0019] Figure 4 It is a three-dimensional cross-sectional structural schematic diagram of the utility model;

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the connecting rod and the clamping block of the utility model.

[0021] Legend:

[0022] 1. Beaker; 2. Top cover; 3. First socket; 4. Connecting rod; 5. Heating wire; 6. Second socket; 7. Temperature sensor probe; 8. Slot; 9. Block; 10. First spring; 11. First connecting rod; 12. Connecting block; 13. Block; 14. Second connecting rod; 15. Slide; 16. Through hole; 17. Connecting plate; 18. Second spring; 19. Rubber ring; 20. Rubber sheet; 21. Sealing plug; 22. Terminal; 23. Mounting plate; 24. Telescopic rod; 25. Support block. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Reference Figure 1-5A device for studying the effect of liquid convection on thermal conductivity, comprising a beaker 1, a top cover 2 is engaged with the top of the beaker 1, a plurality of first jacks 3 are provided on the top of the top cover 2, a connecting rod 4 is slidably provided inside the plurality of first jacks 3, a heating wire 5 is fixedly installed on the bottom end of the connecting rod 4, a terminal 22 is fixedly installed on the top end of the connecting rod 4, a locking mechanism is provided inside the top cover 2, the connecting rod 4 is connected to the top cover 2 through the locking mechanism, a plurality of second jacks 6 are provided on both sides of the top of the top cover 2, a temperature sensor probe 7 is provided inside the second jack 6; When the thermal convection experiment is carried out by the present device, pure water is added into the beaker 1, and then the connecting rod 4 is slid so that the heating wire 5 is in the designated heating position. After the position of the heating wire 5 is adjusted, the connecting rod 4 is fixed by the snap-fit ​​mechanism, and then two temperature sensor probes 7 are respectively inserted into the second jacks 6 on both sides of the top cover 2, and the insertion height of the probes is adjusted so that the measured data can meet the experimental requirements. Then, power is supplied to the heating wire 5 through the terminal 22 to heat the pure water inside the beaker 1, and then the data is recorded through the temperature sensor probe 7, and the measured data is analyzed to draw experimental conclusions.

[0025] As a preferred technical solution of this embodiment, the locking mechanism includes two locking blocks 9, and the two locking blocks 9 are slidably connected on both sides of the inner wall of the first socket 3. The ends of the two locking blocks 9 that are away from each other are fixedly installed with a first spring 10, and one end of the first spring 10 is fixedly connected to the inside of the top cover 2. A plurality of locking grooves 8 are provided on the side wall of the connecting rod 4, and the locking grooves 8 are adapted to the locking blocks 9; the plurality of locking grooves 8 provided on the side wall of the connecting rod 4 are equidistant from each other, so that students can easily determine the insertion height of the resistance wire in the experiment. After the connecting rod 4 is adjusted to a fixed position, the locking block 9 enters the inside of the locking groove 8 to lock the connecting rod 4. When the connecting rod 4 is moved, since there are inclined surfaces on both sides of one end of the locking block 9, the locking block 9 will be squeezed out of the locking groove 8 when the connecting rod 4 moves.

[0026] As a preferred technical solution of this embodiment, a plurality of the side walls of the blocking blocks 9 are provided with a blocking column 13, and a plurality of the blocking columns 13 are fixedly connected to a connecting block 12 at one end away from the blocking block 9, and a plurality of the bottoms of the connecting blocks 12 are fixedly connected to a first connecting rod 11, and one end of two of the first connecting rods 11 is fixedly connected to a slide 15, and the other ends of the two first connecting rods 11 are fixedly connected to a connecting plate 17, and a second spring 18 is fixedly installed on the side walls of the two connecting plates 17, and one end of the two second springs 18 is fixedly connected to the inside of the top cover 2; the first connecting rod 4 and the second connecting rod 14 are driven to move by pulling the slide 15, so that the plurality of blocking columns 13 and the blocking blocks 9 are disengaged from each other, so that the blocking blocks 9 can move inside the top cover 2, and after releasing the slide 15, the two first connecting rods 11 are reset under the action of the second spring 18, and the blocking blocks 9 and the blocking columns 13 are engaged with each other to fix the connecting rod 4, so that the position of the connecting rod 4 cannot be adjusted.

[0027] As a preferred technical solution of this embodiment, a through hole 16 is opened on the top of the sliding plate 15; pulling the sliding plate 15 through the through hole 16 is more labor-saving.

[0028] As a preferred technical solution of this embodiment, a rubber ring 19 is fixedly installed on the inner wall of the second socket 6, and a rubber sheet 20 is slidably provided on the side wall of the temperature sensor probe 7; the temperature sensor probe 7 is fixed by the friction between the rubber ring 19 and the side wall of the temperature sensor probe 7, and is reinforced for the second time by the rubber sheet 20, so that the fixed sensor probe is more stable.

[0029] As a preferred technical solution of this embodiment, a mounting plate 23 is fixedly installed on the side wall of the beaker 1, a telescopic rod 24 is fixedly connected to the top of the mounting plate 23, a support block 25 is fixedly connected to the top of the telescopic rod 24, and one end of the support block 25 is engaged with the temperature sensor probe 7; when the top water body is detected by the temperature sensor probe 7, most of the temperature sensor probe 7 needs to be exposed to the air, and the temperature sensor probe 7 cannot be stabilized by only relying on the second jack 6 to fix the temperature sensor probe 7, and the top of the temperature sensor probe 7 needs to be supported by the support block 25.

[0030] As a preferred technical solution of this embodiment, a sealing plug 21 is provided inside the second plug hole 6 away from the temperature sensor probe 7; the number of temperature sensor probes 7 inserted into the beaker 1 can be increased by plugging and unplugging the sealing plug 21.

[0031] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for studying the effect of liquid convection on thermal conductivity, comprising a beaker (1), characterized in that: The top of the beaker (1) is engaged with a top cover (2), a plurality of first jacks (3) are provided on the top of the top cover (2), a connecting rod (4) is slidably provided inside the plurality of first jacks (3), a heating wire (5) is fixedly installed at the bottom end of the connecting rod (4), a terminal (22) is fixedly installed at the top end of the connecting rod (4), a locking mechanism is provided inside the top cover (2), the connecting rod (4) is connected to the top cover (2) via the locking mechanism, a plurality of second jacks (6) are provided on both sides of the top of the top cover (2), and a temperature sensor probe (7) is provided inside the second jack (6).

2. A device for studying the effect of liquid convection on thermal conductivity according to claim 1, characterized in that: The locking mechanism comprises two locking blocks (9), the two locking blocks (9) are slidably connected to the inner walls of the first plug hole (3), the ends of the two locking blocks (9) away from each other are fixedly mounted with a first spring (10), one end of the first spring (10) is fixedly connected to the inside of the top cover (2), and a plurality of locking grooves (8) are provided on the side wall of the connecting rod (4), and the locking grooves (8) are adapted to the locking blocks (9).

3. A device for studying the effect of liquid convection on thermal conductivity according to claim 2, characterized in that: A plurality of the side walls of the clamping blocks (9) are provided with clamping columns (13), one end of the plurality of the clamping columns (13) away from the clamping blocks (9) is fixedly connected to a connecting block (12), the bottom of the plurality of the connecting blocks (12) is fixedly connected to a first connecting rod (11), one end of two of the first connecting rods (11) is fixedly connected to a sliding sheet (15), the other ends of the two first connecting rods (11) are fixedly connected to a connecting plate (17), the side walls of the two connecting plates (17) are fixedly mounted with a second spring (18), and one end of the two second springs (18) is fixedly connected to the inside of the top cover (2).

4. A device for studying the effect of liquid convection on thermal conductivity according to claim 3, characterized in that: A through hole (16) is formed on the top of the sliding sheet (15).

5. A device for studying the effect of liquid convection on thermal conductivity according to claim 4, characterized in that: A rubber ring (19) is fixedly mounted on the inner wall of the second plug hole (6), and a rubber sheet (20) is slidably arranged on the side wall of the temperature sensor probe (7).

6. The device for studying the effect of liquid convection on thermal conductivity according to claim 4, characterized in that: A mounting plate (23) is fixedly mounted on the side wall of the beaker (1); a telescopic rod (24) is fixedly connected to the top of the mounting plate (23); a support block (25) is fixedly connected to the top of the telescopic rod (24); one end of the support block (25) is engaged with the temperature sensor probe (7).

7. The device for studying the effect of liquid convection on thermal conductivity according to claim 4, characterized in that: A sealing plug (21) is provided in the interior of the second insertion hole (6) away from the temperature sensor probe (7).

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