Heat conductivity coefficient tester

Abstract

The utility model discloses a heat conductivity coefficient tester which comprises a box body and an electric box, the upper wall surface of the box body is provided with a working plate, the lower wall surface of the box body is provided with a lower plate, the working plate is provided with a pair of stand columns, and the stand columns are connected with a heat insulation disc through an adjusting structure. The heat insulation disc is internally provided with a heating plate connected through a heating plate connecting nail, the heat insulation disc is connected with a heating disc through a third connecting nail, the heating disc is provided with a heating disc sensor, and the working plate is provided with a heat dissipation structure corresponding to the position of the heating disc. The box body structure of the working plate and the lower plate is adopted, the stand columns and the movable cross beams are matched, accurate alignment of the heating disc and the heat dissipation disc is achieved, heat conduction path deviation is reduced, and measurement accuracy is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of thermal conductivity measuring instruments, specifically a thermal conductivity measuring instrument. Background Technology

[0002] In some existing instruments used in universities, the tightness between the heating disk, sample plate, and heat dissipation disk is adjusted by three manual screws under the heat dissipation disk. This adjustment is difficult to control in terms of height and is inconvenient. Furthermore, when heating is not required during the experiment, the heating disk can be directly removed for storage, which is inconvenient. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a thermal conductivity measuring instrument, which solves the problem that the tightness between the heating disc, sample plate, and heat dissipation disc in some existing instruments used in universities is difficult to control and inconvenient to adjust by adjusting three manual screws under the heat dissipation disc.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: It includes a housing, with a working plate on the upper wall and a lower plate on the lower wall. A pair of columns are mounted on the working plate, and an insulation plate is connected to the columns via an adjustment structure. A heating disc is connected to the insulation plate via a third connecting nail. A heating disc sensor is mounted on the heating disc. A heating plate connected to the insulation plate via a heating plate connecting nail is located inside the insulation plate. A heat dissipation structure corresponding to the position of the heating disc is provided on the working plate.

[0005] Preferably, the adjustment structure comprises a movable crossbeam mounted on the column, a screw inserted into the movable crossbeam, an adjustment handwheel mounted on the top of the screw, a universal joint mounted on the lower end of the screw, and the universal joint being connected to an insulating disc via a first connecting pin.

[0006] Preferably, the heat dissipation structure comprises an insulating baffle and an insulating support mounted on the working plate, the insulating support being located inside the insulating baffle, a heat dissipation disk mounted on the insulating support, a heat dissipation disk sensor mounted on the heat dissipation disk, and a sample plate placed between the heat dissipation disk and the heating disk.

[0007] Preferably, the movable crossbeam is fitted with a locking handwheel that is connected to the column.

[0008] Preferably, a heating plate power socket is installed on the insulation plate, and a heating plate power connector plug is installed on the heating plate power socket.

[0009] Preferably, a limit nut is installed on the column.

[0010] Preferably, the lower wall of the work plate is provided with a fan that is mounted via a fan connector.

[0011] Preferably, the lower wall surface of the lower plate is provided with a bottom adhesive adjustment nail.

[0012] Preferably, the electrical box is equipped with a room temperature sensor, a heat sink sensor input socket, a heating plate sensor input socket, a fan switch, a heating element power socket, a power switch, and an AC input socket.

[0013] Preferably, the front panel of the electrical box has two temperature displays on the left side, control buttons on the right side of the two temperature displays, an intelligent PID temperature controller on the right side of the control buttons, a timer display on the right side of the intelligent PID temperature controller, and a reset button and a timer / stop button on the right side of the timer display.

[0014] This invention provides a thermal conductivity measuring instrument. It offers the following advantages: The box structure consisting of a working plate and a lower plate, along with columns and a movable crossbeam, ensures precise alignment of the heating plate and the heat dissipation plate, reducing deviations in the heat conduction path. The insulating plate and insulating baffle effectively reduce environmental thermal interference, improving measurement accuracy. The heat dissipation disc, combined with a fan, enhances heat dissipation efficiency. Mechanical adjustment using screws and handwheels, combined with a universal joint, ensures a tight fit between the heating plate and the heat dissipation disc, avoiding measurement errors caused by poor contact. Locking handwheels and limit nuts prevent displacement during the experiment. Sensors on both the heating plate and the heat dissipation disc monitor temperature changes at both ends in real time, ensuring that the thermal conductivity calculation is based on accurate temperature gradient data. The design of the adjusting handwheel and locking mechanism facilitates student understanding of the experimental principle and improves the effectiveness of teaching demonstrations. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the thermal conductivity measuring instrument described in this utility model.

[0016] Figure 2 This is a front view of the electrical box of the thermal conductivity measuring instrument described in this utility model.

[0017] Figure 3 This is a rear view of the electrical box of the thermal conductivity measuring instrument described in this utility model.

[0018] Figure 4 This is a bottom view of the universal joint of the thermal conductivity measuring instrument described in this utility model.

[0019] Figure 5 This is a cross-sectional view of the universal joint of the thermal conductivity measuring instrument described in this utility model.

[0020] In the diagram: 1-Box body; 2-Working plate; 3-Lower plate; 4-Column; 5-Insulation plate; 6-Third connecting pin; 7-Heating disc; 8-Heating disc sensor; 9-Heating plate connecting pin; 10-Heating plate; 11-Moving crossbeam; 12-Adjusting handwheel; 13-Screw; 14-Universal joint; 15-First connecting pin; 16-Insulation baffle; 17-Insulation support column; 18-Heat dissipation disc; 19-Heat dissipation disc sensor; 20-Locking handwheel; 21-Heat plate power socket; 22-Heat plate power connector plug; 23 - Nut; 24- Fan connecting pin; 25- Fan; 26- Foot adjustment nail; 27- Sample plate; Electrical box section in the diagram: 28- Heat sink sensor input socket; 29- Heating plate sensor input socket; 30- Fan switch; 31- Heating element power socket; 32- Power switch; 33- AC220 input socket; 34- Temperature display screen; 35- Control buttons; 36- Intelligent PID temperature controller; 37- Timer display screen; 38- Room temperature sensor; 39- Zero button; 40- Timer / Stop button. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-5 This utility model provides a technical solution: a thermal conductivity measuring instrument, including a housing 1 and an electrical box. The upper wall of the housing 1 is provided with a working plate 2, and the lower wall of the housing 1 is provided with a lower plate 3. A pair of columns 4 are installed on the working plate 2. An insulating plate 5 is connected to the columns 4 through an adjustment structure. A heating plate 10 is provided inside the insulating plate 5 through a heating plate connecting nail 9. A heating disc 7 is connected to the insulating plate 5 through a third connecting nail 6. A heating disc sensor 8 is installed on the heating disc 7. A heat dissipation structure corresponding to the position of the heating disc 7 is provided on the working plate 2.

[0023] As a preferred technical solution, the adjustment structure is further provided as follows: a movable crossbeam 11 is mounted on the column 4, a screw 13 is inserted into the movable crossbeam 11, an adjustment handwheel 12 is installed on the top of the screw, a universal joint 14 is installed at the lower end of the screw 13, and the universal joint 14 is connected to the heat insulation plate 5 through the first connecting pin 15.

[0024] As a preferred technical solution, the heat dissipation structure is further provided as follows: an insulating baffle 16 and an insulating support 17 are installed on the working plate 2. The insulating support 17 is located inside the insulating baffle 16. A heat dissipation disk 18 is installed on the insulating support 17. A heat dissipation disk sensor 19 is installed on the heat dissipation disk 18. A sample plate 27 is placed between the heat dissipation disk 18 and the heating disk 7.

[0025] As a preferred technical solution, the movable crossbeam 11 is further equipped with a locking handwheel 20 that is connected to the column 4.

[0026] As a preferred technical solution, the heating plate 5 is further equipped with a heating plate power socket 21, and the heating plate power socket 21 is equipped with a heating plate power connector 22.

[0027] As a preferred technical solution, a limit nut 23 is further installed on the column.

[0028] As a preferred technical solution, the lower wall of the work plate 2 is provided with a fan 25 installed via a fan connecting nail 24.

[0029] As a preferred technical solution, the lower wall of the lower plate 3 is further provided with a bottom adhesive adjustment nail 26.

[0030] As a preferred technical solution, the electrical box is further equipped with a room temperature sensor 38, and the box body 1 is equipped with a heat sink sensor input socket 28, a heating plate sensor input socket 29, a fan switch 30, a heating element power socket 31, a power switch 32, and an AC220 input socket 33.

[0031] As a preferred technical solution, two temperature display screens 34 are provided on the left side of the front wall of the electrical box, control buttons 35 are provided on the right side of the two temperature display screens 34, intelligent PID temperature control meter 36 is provided on the right side of the control buttons, timer display screen 37 is provided on the right side of the intelligent PID temperature control meter 36, and reset button 39 and timer / stop button 40 are provided on the right side of the timer display screen 37.

[0032] It should be noted that: Place the instrument on a stable experimental platform and adjust the foot adjustment screws 26 to ensure stability. Assemble the components according to the assembly diagram. Apply thermal grease to the sensors and fully insert them into the small holes of the heating disk 7 and the heat dissipation disk 18. Connect the wires and power cords of each part. Turn on the electrical box and preheat it for 5 minutes. Set the PID control temperature gauge: Press the temperature rise button; the SV window will display 80.0℃. Generally, a setting of 75-80℃ is more suitable. The flashing OUT light indicates that heating has started. Turn on the fan 25 switch, and the instrument will begin heating. When the temperature of the heating disk 7 reaches the set temperature, start recording the temperature of the cooling disk 18. Record the temperature every minute. If the temperatures of both the heating disk 7 and the cooling disk 18 remain relatively constant within 10 minutes, it can be considered that a stable state has been reached. Move the heating disk 7 upwards along the column 4 via the moving beam 11 to move the cooling disk 18 away from the sample. Then move the moving beam 11 downwards to ensure good contact between the heating disk 7 and the cooling disk 18. Set the temperature to 80℃ to accelerate the temperature rise of the heating disk 7 (press the temperature rise button) until the cooling disk 18 rises by about 15℃ from its original temperature. Move the heating disk 7 upwards to allow the cooling disk 18 to cool under the action of the fan 25. Record the temperature of the disk every 10 seconds (or slightly longer, such as 20 or 30 seconds). Plot a heat dissipation curve and calculate the cooling rate of the cooling disk.

[0033] When heat transfer reaches a steady state, the temperatures of the upper and lower surfaces of the sample are... and Keeping the temperature constant, record the temperature value at this time and substitute it into the formula to calculate the thermal conductivity:

[0034] ;

[0035] in, This indicates that the heat sink has quality. Indicates the specific heat capacity of the heat sink; Indicates heat sink radius; Indicates the thickness of the heat sink; Indicates the thickness of the rubber sample; This indicates the diameter of the eraser.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A thermal conductivity measuring instrument, comprising a housing (1) and an electrical box, wherein a working plate (2) is provided on the upper wall of the housing (1) and a lower plate (3) is provided on the lower wall of the housing (1), characterized in that, A pair of columns (4) are installed on the working plate (2). An insulating plate (5) is connected to the column (4) through an adjustment structure. A heating plate (10) is provided inside the insulating plate (5) and connected by a heating plate connecting nail (9). A heating disc (7) is connected to the insulating plate (5) through a third connecting nail (6). A heating disc sensor (8) is installed on the heating disc (7). A heat dissipation structure corresponding to the position of the heating disc (7) is provided on the working plate (2).

2. The thermal conductivity measuring instrument according to claim 1, characterized in that, The adjustment structure is as follows: a movable crossbeam (11) is mounted on the column (4), a screw (13) is inserted on the movable crossbeam (11), an adjustment handwheel (12) is installed on the top of the screw (13), a universal joint (14) is installed at the lower end of the screw (13), and the universal joint (14) is connected to the heat insulation plate (5) through the first connecting pin (15).

3. The thermal conductivity measuring instrument according to claim 1, characterized in that, The heat dissipation structure is as follows: an insulating baffle (16) and an insulating support (17) are installed on the working plate (2). The insulating support (17) is located inside the insulating baffle (16). A heat dissipation disk (18) is installed on the insulating support (17). A heat dissipation disk sensor (19) is installed on the heat dissipation disk (18). A sample plate (27) is placed between the heat dissipation disk (18) and the heating disk (7).

4. The thermal conductivity measuring instrument according to claim 2, characterized in that, The movable crossbeam (11) is fitted with a locking handwheel (20) that is connected to the column (4).

5. The thermal conductivity measuring instrument according to claim 1, characterized in that, A heating plate power socket (21) is installed on the insulation plate (5), and a heating plate power connector plug (22) is installed on the heating plate power socket (21).

6. The thermal conductivity measuring instrument according to claim 1, characterized in that, The column (4) is equipped with a limit nut (23), the lower wall of the working plate (2) is provided with a fan (25) installed by a fan connecting nail (24), and the lower wall of the lower plate (3) is provided with a bottom rubber adjusting nail (26).

7. The thermal conductivity measuring instrument according to claim 1, characterized in that, The electrical box is equipped with a room temperature sensor (38), and the box body (1) is equipped with a heat sink sensor input socket (28), a heating plate sensor input socket (29), a fan switch (30), a heating element power socket (31), a power switch (32), and an AC220 input socket (33).

8. The thermal conductivity measuring instrument according to claim 1, characterized in that, Two temperature displays (34) are provided on the left side of the front wall of the electrical box. Control buttons (35) are provided on the right side of the two temperature displays (34). Intelligent PID temperature controller (36) is provided on the right side of the control buttons. Time display (37) is provided on the right side of the intelligent PID temperature controller (36). Zero button (39) and timer / stop button (40) are provided on the right side of the time display (37).

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