Temperature control type and limiting type cooling method metal specific heat capacity measuring instrument

Abstract

The utility model provides a temperature control type and limit type cooling method metal specific heat capacity measuring instrument which comprises a control electric box and a measuring instrument body, the measuring instrument body comprises a base, and bottom feet are arranged at the bottom of the base. The control electric box comprises a measuring part and a temperature control part, and the temperature control part comprises an intelligent PID heating control meter and a temperature control input; a furnace body, a thermocouple plug, a stand column, a sample support, a windshield and a protective cover are arranged on the base, the stand column is located on the right side of the base, a rotatable rotating sleeve is arranged at the upper end of the stand column, a limiting nut is arranged at the top end of the stand column, a fixing shaft is arranged on the left side of the rotating sleeve, a center limiting locking nail is arranged between the rotating sleeve and the fixing shaft, and the thermocouple plug is connected with a control electric box measuring part. The utility model relates to the field of metal specific heat capacity measurement, which can ensure that the temperature of a furnace body is constant and the heating temperature of a sample is constant by adopting an intelligent PID (Proportion Integration Differentiation) heating control meter, and can keep the center unchanged when the furnace body is lifted by limiting and fixing a center limiting and locking nail and an auxiliary locking nail.

Description

Technical Field

[0001] The utility model relates to the field of metal specific heat capacity measurement, in particular to a temperature-controlled, position-limited cooling method metal specific heat capacity measuring instrument. Background Art

[0002] The existing institutions generally use a frame that moves up and down and aligns the center twice to measure the specific heat of metal, which is troublesome to operate. The sample heating also requires repeated heating from low temperature to high temperature. Summary of the Invention

[0003] In view of this, the utility model aims to propose a temperature-controlled, limited cooling method metal specific heat capacity measuring instrument, which can ensure the constant temperature of the furnace body and the constant heating temperature of the sample. The center can remain unchanged when the furnace body is raised or lowered through the limiting fixation of the center limiting locking pin and the auxiliary locking pin.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0005] A temperature-controlled, limited-cooling metal specific heat capacity measuring instrument, comprising a control electrical box and a measuring instrument body, wherein the control electrical box controls the measuring instrument body, the measuring instrument body comprising a base, the bottom of the base being provided with feet, the control electrical box comprising a measuring portion and a temperature control portion, the temperature control portion comprising an intelligent PID heating control table and a temperature control input;

[0006] The base is provided with a furnace body, a thermocouple plug, a column, a sample holder, a windshield and a protective cover. The column is located on the right side of the base. A rotatable sleeve is provided on the upper end of the column. A limit nut is provided on the top of the column. A fixed shaft is provided on the left side of the sleeve. A center limit locking nail is provided between the sleeve and the fixed shaft. The thermocouple plug is connected to the measuring part of the control electrical box.

[0007] Furthermore, the furnace body includes a first coil baffle, a coil skeleton, a furnace heating coil, an outer cover, and a second coil baffle, wherein the coil skeleton is connected to the upper end surface of the inner ring of the first coil baffle, the outer cover is connected to the outer ring of the first coil baffle, and the furnace heating coil is wrapped around the coil skeleton;

[0008] The second coil baffle is connected to the top of the outer cover.

[0009] Furthermore, the wind shield is located on the left side of the base, the furnace body is located inside the wind shield, a thermocouple limit frame is provided in the wind shield, the upper end sample of the thermocouple limit frame is inserted into the inner circle of the first coil baffle when heating, a thermocouple is connected to the center of the thermocouple limit frame, a protective cover is connected to the second coil baffle, a heat insulation board is connected to the protective cover, a connecting plate is connected to the heat insulation board, a heating connecting wire seat is provided on the connecting plate, and the heating connecting wire seat is connected to the temperature control input of the electric box through a wire, The right end of the connecting plate is connected to a lifting dovetail groove, and the lower left end of the lifting dovetail groove is connected to a movable connecting plate. A dovetail is provided on the left side of the movable connecting plate, and a rack is connected to the right side of the dovetail. The lower front end of the lifting dovetail groove is connected to a lifting worm and a sleeve, and the lifting worm and the sleeve are connected to a lifting handwheel, and the lifting worm and the sleeve are engaged with the rack. The lifting handwheel controls the rack to rise and fall in the vertical direction, and the right end of the lifting dovetail groove is connected to a rotating sleeve, and an auxiliary locking pin is connected to the right side of the rotating sleeve. A sample is mounted on the sample holder.

[0010] Furthermore, the sample includes the first sample, the second sample and the third sample, the first sample is installed on the thermocouple, the first sample is a copper sample, the second sample is an iron sample, and the third sample is an aluminum sample.

[0011] Furthermore, the measuring section includes a sample voltage display screen, a measurement input, a time display screen, a time reset button, and a time / stop button;

[0012] The thermocouple plug is connected to the measurement input, and the heating connection wire seat is connected to the temperature control input through a wire.

[0013] Furthermore, a hole matching the protective cover is opened at the upper end of the wind shield, the diameter of the furnace body is smaller than the diameter of the hole, and the protective cover is installed on the wind shield.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] The utility model provides a temperature-controlled, position-limited cooling method metal specific heat capacity measuring instrument. By adopting a PID heating control table, the furnace body temperature can be kept constant, and the sample heating temperature can be kept constant. When changing the sample, the rotating sleeve is rotated to rotate the rotating frame along the fixed axis. After the sample is installed, the frame is rotated back, the center limit locking pin is locked, the auxiliary locking pin is locked, and the lifting hand wheel is rotated to move the furnace body downward to complete the sample heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 Schematic diagram of a temperature-controlled, position-limited cooling method metal specific heat capacity measuring instrument according to an embodiment of the present invention;

[0018] Figure 2 A side view of a temperature-controlled, position-limited cooling method metal specific heat capacity measuring instrument according to an embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of a control electrical box of a temperature-controlled, position-limited cooling metal specific heat capacity measuring instrument according to an embodiment of the present invention;

[0020] Description of reference numerals:

[0021] 1. Foot; 2. Base; 3. Thermocouple limit frame; 4. First coil baffle; 5. Coil skeleton; 6. Furnace heating coil; 7. Thermocouple; 8. Thermocouple plug; 9. First sample; 10. Outer cover; 11. Second coil baffle; 12. Protective cover; 13. Heat insulation board; 14. Connecting plate; 15. Heating connecting wire holder; 16. Movable connecting plate; 17. Lifting handwheel; 18. Dovetail; 19. Rack; 20. Lifting dovetail groove; 21. Column; 22. Fixed shaft; 23. Rotating sleeve; 24. Center limit locking pin; 25. Limit nut; 26. Auxiliary locking pin; 27. Lifting worm and sleeve; 28. Sample; 29. ​​Sample holder; 30. Wind shield; 31. Protective cover. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0023] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "back" and other terms indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0025] The present embodiment relates to a temperature-controlled, position-limited cooling method metal specific heat capacity measuring instrument, which can ensure the constant temperature of the furnace body and the constant temperature of the sample heating by adopting a PID heating control table. When changing the sample, the rotating sleeve is rotated to rotate the rotating frame along the fixed axis. After the sample is installed, the frame is rotated back, the center limit locking pin 24 is locked, the auxiliary locking pin 26 is locked, and the lifting handwheel is turned to move the furnace body downward to complete the sample heating.

[0026] Based on the above design concept, an exemplary structure of the temperature-controlled, limited cooling method metal specific heat capacity measuring instrument of this embodiment is as follows: Figure 1-3 As shown, it mainly includes a control electrical box and a measuring instrument body. The control electrical box controls the measuring instrument body. The measuring instrument body includes a base 2. A foot 1 is provided at the bottom of the base 2. The control electrical box includes a measuring part and a temperature control part. The temperature control part includes an intelligent PID heating control table and a temperature control input; a furnace body, a thermocouple plug 8, a column 21, a sample holder 29, a wind shield 30 and a protective cover 31 are provided on the base 2. The column 21 is located on the right side of the base 2. A rotatable sleeve 23 is provided at the upper end of the column 21. A limiting nut 25 is provided at the top of the column 21. A fixed shaft 22 is provided on the left side of the sleeve 23. A center limiting locking nail 24 is provided between the sleeve 23 and the fixed shaft 22. The thermocouple plug 8 is connected to the measuring part of the control electrical box.

[0027] The furnace body includes a first coil baffle 4, a coil skeleton 5, a furnace heating coil 6, an outer cover 10 and a second coil baffle 11. The coil skeleton 5 is connected to the upper end face of the inner circle of the first coil baffle 4, the outer cover 10 is connected to the outer circle of the first coil baffle 4, and the furnace heating coil 6 is wrapped around the coil skeleton 5; the second coil baffle 11 is connected to the top of the outer cover 10.

[0028] The wind shield 30 is located on the left side of the base 2, and the furnace body is located inside the wind shield 30. A thermocouple limit frame 3 is provided in the wind shield 30. The upper end of the thermocouple limit frame 3 is inserted into the inner circle of the first coil baffle 4. The center of the thermocouple limit frame 3 is connected to the thermocouple 7. The second coil baffle 11 is connected to a protective cover 12, and the protective cover 12 is connected to a heat insulation board 13. The heat insulation board 13 is connected to a connecting plate 14. A heating connecting wire seat 15 is provided on the connecting plate 14. The heating connecting wire seat 15 is connected to the temperature control input of the electric box through a wire. The right end of the connecting plate 14 is connected to a lifting dovetail. Groove 20, the lower left end of the lifting dovetail groove 20 is connected to the movable connecting plate 16, a dovetail 18 is provided on the left side of the movable connecting plate 16, and a rack 19 is connected to the right side of the dovetail 18. The lower front end of the lifting dovetail groove 20 is connected to a lifting worm and a sleeve 27, and the lifting worm and the sleeve 27 are connected to the lifting handwheel 17. The lifting worm and the sleeve 27 are engaged with the rack 19, and the lifting handwheel 17 controls the rack 19 to rise and fall in the vertical direction. The right end of the lifting dovetail groove 20 is connected to a rotating sleeve 23, and an auxiliary locking pin 26 is connected to the right side of the rotating sleeve 23. A sample 28 is mounted on the sample holder 29.

[0029] The sample 28 includes a first sample 9 , a second sample and a third sample. The first sample 9 is mounted on the thermocouple 7 . The first sample 9 is a copper sample. The second sample is an iron sample. The third sample is an aluminum sample.

[0030] The measuring part includes a sample voltage display, a measurement input, a time display, a time reset button, and a timing / stop button; the thermocouple plug 8 is connected to the measurement input, and the heating connection wire seat 15 is connected to the temperature control input through a wire.

[0031] A hole matching the protective cover 31 is opened at the upper end of the wind shield 30 . The diameter of the furnace body is smaller than the diameter of the hole. The protective cover 31 is installed on the wind shield 30 .

[0032] The temperature-controlled, limited-cooling metal specific heat capacity measuring instrument described in this embodiment is used in the following steps: 1. Place the measuring instrument body and the control electrical box on a stable laboratory table;

[0033] 2. Connect the thermocouple plug 8 to the measurement input of the control box, and connect the heating connection wire holder 15 to the temperature control input of the control box through a wire;

[0034] 3. Weigh the masses of the three identical samples 28, namely the copper sample (i.e., the first sample 9), the iron sample, and the aluminum sample, using a physical balance or an electronic balance to determine MCU>MFe>MAL and distinguish them;

[0035] 4. Turn on the control box and input the controlled furnace temperature, such as 260 degrees, to heat the furnace to the set temperature that meets the experiment;

[0036] 5. Place the copper sample (i.e. the first sample 9) in the thermocouple limiter 3 and press Figure 1 Position the furnace body, rotate it to the center, lock the center limit pin 24, lock the auxiliary locking pin 26, turn the lifting handwheel 17, lower the furnace body to heat the sample, and when the voltmeter reading reaches a certain value (the voltage reading corresponds to 200°C), adjust the lifting handwheel 17 to raise the furnace body, then loosen the center limit locking pin 24 and auxiliary locking pin 26, and rotate the furnace body to remove it. This operation is repeated for each sample experiment;

[0037] 6. Leave the sample in its original position in the windshield 30 to cool naturally (the barrel mouth must be covered with a lid 31). When the temperature drops to the input voltage value (102°C), start recording. Measure the time △t0 required for the sample to drop from 102°C to 98°C. Measure the temperature drop rate in the order of copper, iron, and aluminum. Repeat the measurement five times for each sample. Finally, tabulate the data and calculate the specific heat capacity of the sample.

[0038] The temperature-controlled, position-limited cooling method for measuring the specific heat capacity of metals using the aforementioned embodiment effectively maintains a constant furnace temperature. This temperature is controlled throughout the experiment, allowing each sample to be heated at the same constant temperature. Furthermore, when the furnace lift frame rotates away from the center and then returns to the center, the center-limited locking pin 24 and auxiliary locking pin 26 ensure that the center remains unchanged during the furnace lift, facilitating experiments and ensuring consistent sample heating temperatures.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A temperature-controlled, limited cooling method metal specific heat capacity measuring instrument, comprising a control box and a measuring instrument body, wherein the control box controls the measuring instrument body, the measuring instrument body comprises a base (2), and the bottom of the base (2) is provided with a foot (1), characterized in that: The control electrical box includes a measuring part and a temperature control part, and the temperature control part includes an intelligent PID heating control table and a temperature control input; The base (2) is provided with a furnace body, a thermocouple plug (8), a column (21), a sample holder (29), a wind shield (30) and a protective cover (31), the column (21) is located on the right side of the base (2), a rotatable sleeve (23) is provided at the upper end of the column (21), a limiting nut (25) is provided at the top end of the column (21), a fixed shaft (22) is provided on the left side of the sleeve (23), a center limiting locking nail (24) is provided between the sleeve (23) and the fixed shaft (22), and the thermocouple plug (8) is connected to the measuring part of the control box.

2. The temperature-controlled, limited cooling method metal specific heat capacity measuring instrument according to claim 1 is characterized in that: The furnace body comprises a first coil baffle (4), a coil skeleton (5), a furnace body heating coil (6), an outer cover (10) and a second coil baffle (11), wherein the coil skeleton (5) is connected to the upper end surface of the inner ring of the first coil baffle (4), the outer cover (10) is connected to the outer ring of the first coil baffle (4), and the furnace body heating coil (6) is wrapped around the coil skeleton (5); The second coil baffle (11) is connected to the top of the outer cover (10).

3. The temperature-controlled, limited cooling method metal specific heat capacity measuring instrument according to claim 2, characterized in that: The wind shield (30) is located on the left side of the base (2). The sample (28) is located inside the wind shield (30) when heated. A thermocouple limit frame (3) is provided in the wind shield (30). The upper end of the thermocouple limit frame (3) is inserted into the inner circle of the first coil baffle (4). The center of the thermocouple limit frame (3) is connected to a thermocouple (7). The second coil baffle (11) is connected to a protective cover (12). The protective cover (12) is connected to a heat insulation board (13). The heat insulation board (13) is connected to a connecting plate (14). The connecting plate (14) is provided with a heating connecting wire seat (15). The heating connecting wire seat (15) is connected to the temperature control input of the electric box through a wire. The right end of the connecting plate (14) is connected to a rising The lower left end of the lifting dovetail groove (20) is connected to a movable connecting plate (16), a dovetail (18) is provided on the left side of the movable connecting plate (16), a rack (19) is connected to the right side of the dovetail (18), a lifting worm and a sleeve (27) are connected to the lower front end of the lifting dovetail groove (20), the lifting worm and the sleeve (27) are connected to a lifting handwheel (17), the lifting worm and the sleeve (27) are engaged with the rack (19), the lifting handwheel (17) controls the rack (19) to rise and fall in the vertical direction, the right end of the lifting dovetail groove (20) is connected to a rotating sleeve (23), the right side of the rotating sleeve (23) is connected to an auxiliary locking pin (26), and a sample (28) is mounted on the sample holder (29).

4. The temperature-controlled, limited cooling method metal specific heat capacity measuring instrument according to claim 3 is characterized in that: The sample (28) includes the first sample (9), a second sample and a third sample, the first sample (9) is installed on the thermocouple (7), the first sample (9) is a copper sample, the second sample is an iron sample, and the third sample is an aluminum sample.

5. The temperature-controlled, limited cooling method metal specific heat capacity measuring instrument according to claim 4 is characterized in that: The measuring section includes a sample voltage display screen, a measurement input, a time display screen, a time reset button, and a timing / stop button; The thermocouple plug (8) is connected to the measurement input, and the heating connection wire seat (15) is connected to the temperature control input via a wire.

6. The temperature-controlled, limited-cooling metal specific heat capacity measuring instrument according to claim 5, characterized in that: A hole matching the protective cover (31) is provided at the upper end of the wind shield (30), the diameter of the furnace body is smaller than the diameter of the hole, and the protective cover (31) is mounted on the wind shield (30).

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