High-temperature specific heat capacity tester

Abstract

The utility model discloses a high-temperature specific heat capacity tester which comprises a main control cabinet, a heating device, a connecting sleeve and a detection device, the heating device is fixedly installed on the detection device through the connecting sleeve, the detection device is fixedly installed on the main control cabinet, the heating device comprises an electric furnace, a test sample is hung in a heating hearth through a high-temperature-resistant wire to be heated, and the electric furnace is connected with the electric furnace. The detection device comprises an outer box body connected with the connecting sleeve, a constant-temperature heat insulation screen cover is installed in the outer box body, a temperature-controllable heat insulation screen cover is installed in the constant-temperature heat insulation screen cover through an insulation support, a heat measuring block is installed in the temperature-controllable heat insulation screen cover through an insulation support, and an electric heating tube and a thermocouple are arranged on the heat measuring block. A heating resistance wire is arranged on the side wall of the temperature-controllable heat insulation shield, a temperature difference thermopile is arranged between the heating resistance wire and the calorimetric block, and a copper pipe used for introducing constant-temperature hot water is wound on the side wall of the constant-temperature heat insulation shield. The high-temperature specific heat capacity tester disclosed by the utility model is high in measurement precision, simple to operate and small in size.

Description

Technical Field

[0001] The utility model relates to the field of physical testing instruments, in particular to a high-temperature specific heat capacity tester. Background Art

[0002] Specific heat capacity is the heat capacity of a unit mass of a substance, that is, the amount of heat absorbed or released when a unit mass of an object changes its unit temperature. The specific heat capacity of a substance reflects the ability of the substance to absorb or release heat without phase change and is an important physical quantity. The method of measuring the specific heat capacity of metals by the mixing method is a commonly used experimental method. It is based on the principle of heat conservation and calculates the specific heat capacity of a metal by measuring the heat exchange amount between the metal to be measured and a standard substance with a known specific heat capacity. In the prior art, the devices for measuring the high-temperature specific heat capacity of metal materials and solid inorganic materials by the mixing method generally have the problems of complex structure and inconvenient operation, and the measurement accuracy is affected due to heat exchange with the outside world. Summary of the Invention

[0003] The purpose of the utility model is to provide a high-temperature specific heat capacity tester with high measurement accuracy, simple operation and small volume.

[0004] The technical solution adopted by the utility model is as follows: a high-temperature specific heat capacity tester includes a main control cabinet, a heating device, a connecting sleeve and a detection device. The heating device is fixedly installed on the detection device through the connecting sleeve, and the detection device is fixedly installed on the main control cabinet.

[0005] The heating device includes an electric furnace. There is a heating furnace cavity that penetrates up and down in the middle of the electric furnace. A furnace cover is arranged at the upper port of the heating furnace cavity. There is a through hole on the furnace cover. The test sample is suspended in the heating furnace cavity by a high-temperature resistant wire. The high-temperature resistant wire passes through the through hole on the furnace cover and is fixed. A furnace door is arranged at the lower port of the heating furnace cavity.

[0006] The detection device includes an outer box connected to the connecting sleeve. A constant temperature adiabatic screen cover is installed in the outer box. A controllable temperature adiabatic screen cover is installed in the constant temperature adiabatic screen cover through an insulating support. A calorimeter block is installed in the controllable temperature adiabatic screen cover through an insulating support. Channels for the test sample to fall into the calorimeter block are arranged on the outer box, the constant temperature adiabatic screen cover and the controllable temperature adiabatic screen cover. An electric heating tube and a thermocouple for obtaining the temperature of the calorimeter block are arranged on the calorimeter block. Heating resistance wires are arranged on the side wall of the controllable temperature adiabatic screen cover. A thermopile is arranged between the heating resistance wires and the calorimeter block. The heating resistance wires adjust the heating temperature according to the temperature difference data measured by the thermopile to make the temperature of the heating resistance wires consistent with the temperature of the calorimeter block. A copper tube for passing through constant temperature hot water is wound on the side wall of the constant temperature adiabatic screen cover.

[0007] Further, heat-insulating end caps are respectively arranged at two ends of the constant-temperature heat-insulating screen cover and the temperature-controllable heat-insulating screen cover.

[0008] Further, a cover is arranged at the inlet of the calorimeter block.

[0009] Further, a fixed seat is arranged on the furnace cover. A fiber heat-insulating block is filled in the fixed seat, and a guide sleeve for a high-temperature resistant wire to pass through is arranged on the fixed seat.

[0010] Further, the high-temperature resistant wire is a nickel-chromium wire.

[0011] Further, an electric furnace temperature measuring thermocouple for measuring the temperature of the electric furnace hearth is installed at the furnace cover through a thermocouple fixed seat.

[0012] Further, adjustable feet are installed at the bottom of the main control cabinet, and a spirit level is installed on the main control cabinet.

[0013] Further, an instrument panel is arranged on the main control cabinet, and control buttons and a display module are arranged on the instrument panel.

[0014] In the high-temperature specific heat capacity tester of the present utility model, an electric heating tube is arranged on the calorimeter block. Before the test, the heat capacity of the calorimeter block can be measured first. Then, the test specimen is heated to the experimental temperature in the electric furnace, and the high-temperature resistant wire connecting the test specimen is released to make it fall into the calorimeter block. The specific heat capacity of the test specimen can be calculated by the calculation module according to the calculation formula through collecting the temperature change of the calorimeter block. To avoid the influence of heat exchange with the outside on the measurement accuracy, the present utility model is provided with a temperature-controllable heat-insulating screen cover and a constant-temperature heat-insulating screen cover. The temperature-controllable heat-insulating screen cover can adjust the temperature according to the temperature change of the calorimeter block, so that the temperature around the calorimeter block is consistent with the temperature of the calorimeter block, avoiding heat exchange, thereby improving the measurement accuracy. The constant-temperature heat-insulating screen cover provides a stable external environmental temperature, thus facilitating the temperature adjustment and control of the temperature-controllable heat-insulating screen cover. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the present utility model.

[0016] In the figure: adjustable feet 1, main control cabinet 2, instrument panel 3, spirit level 4, outer box body 5, copper tube 6, thermopile 7, cover 8, constant-temperature heat-insulating screen cover 9, furnace door 10, electric furnace 11, test specimen 12, electric furnace temperature measuring thermocouple 13, furnace cover 14, thermocouple fixed seat 15, fixed seat 16, guide sleeve 17, fiber heat-insulating block 18, high-temperature resistant wire 19, connecting sleeve 20, calorimeter block 21, thermocouple 22, electric heating tube 23, temperature-controllable heat-insulating screen cover 24, insulating support 25. Detailed Embodiments

[0017] For the convenience of understanding the present utility model, the following will describe the present utility model more comprehensively and meticulously in conjunction with the accompanying drawings of the specification and preferred embodiments. However, the protection scope of the present utility model is not limited to the following specific embodiments.

[0018] As Figure 1 shown, a high-temperature specific heat capacity tester of this embodiment includes a main control cabinet 2, a heating device, a connecting sleeve 20, and a detection device. The heating device is fixedly installed on the detection device through the connecting sleeve 20, and the detection device is fixedly installed on the main control cabinet 2.

[0019] The heating device is used to heat the test sample to the experimental temperature, and includes an electric furnace 11. A heating furnace cavity that penetrates up and down is provided in the middle of the electric furnace 11. A furnace cover 14 is provided at the upper port of the heating furnace cavity. A through hole is provided on the furnace cover 14. The test sample 12 is suspended in the heating furnace cavity by a high-temperature resistant wire 19. The high-temperature resistant wire 19 passes through the through hole on the furnace cover 14 and is fixed. A furnace door 10 is provided at the lower port of the heating furnace cavity. In this embodiment, the high-temperature resistant wire 19 is made of nickel-chromium wire.

[0020] The detection device includes an outer box body 5 connected to the connecting sleeve 20. A constant temperature and heat insulation shield 9 is installed in the outer box body 5. A controllable temperature and heat insulation shield 24 is installed in the constant temperature and heat insulation shield 9 through an insulating support 25. A calorimeter block 21 is installed in the controllable temperature and heat insulation shield 24 through an insulating support 25. A cavity for accommodating the test sample 12 is provided on the calorimeter block 21. Channels for the test sample 12 to fall into the calorimeter block 21 are provided on the outer box body 5, the constant temperature and heat insulation shield 9, and the controllable temperature and heat insulation shield 24. An electric heating tube 23 and a thermocouple 22 for obtaining the temperature of the calorimeter block 21 are provided on the calorimeter block 21. A heating resistance wire is provided on the side wall of the controllable temperature and heat insulation shield 24. A thermopile 7 is provided between the heating resistance wire and the calorimeter block 21. The heating resistance wire adjusts the heating temperature according to the temperature difference data measured by the thermopile 7 to make the temperature of the heating resistance wire consistent with the temperature of the calorimeter block 21. A copper tube 6 for introducing constant temperature hot water is wound around the side wall of the constant temperature and heat insulation shield 9.

[0021] Before using the high-temperature specific heat capacity tester of this embodiment, first heat the calorimetric block 21 through the electric heating tube 23 provided on the calorimetric block 21, so as to calibrate the heat capacity of the calorimetric block 21. Specifically, the heat capacity of the calorimetric block can be calculated through the heating current, voltage, energization time, and the temperature change value of the calorimetric block 21. During the test, first suspend the test sample 12 in the heating furnace through a nickel-chromium wire and heat it to the experimental temperature, then open the furnace door 10, release the nickel-chromium wire connecting the test sample 12 to make the test sample 12 fall into the calorimetric block 21. At this time, the heating resistance wire on the temperature-controlled adiabatic shield 24 adjusts the heating temperature according to the data of the thermocouple pile 7, so that the temperature of the heating resistance wire is the same as the temperature of the calorimetric block 21, thereby avoiding heat exchange with the outside world. Constant-temperature water bath is passed through the copper tube 6 to keep the external environment temperature constant, so as to facilitate temperature adjustment and control. When the temperature of the calorimetric block 21 measured by the thermocouple 22 no longer rises, the calculation module can automatically calculate the specific heat capacity of the test sample 12 according to the heat capacity, initial temperature, final temperature of the calorimetric block 21, the experimental temperature to which the test sample 12 is heated in the electric furnace, and the mass of the test sample.

[0022] To avoid heat exchange with the outside world, adiabatic end caps are respectively provided at both ends of the constant-temperature adiabatic shield 9 and the temperature-controlled adiabatic shield 24. A cover 8 is provided at the entrance of the calorimetric block 21, and the cover 8 is closed after the test sample 12 falls into the calorimetric block.

[0023] To facilitate the fixing of the high-temperature resistant wire 19 and ensure that the test sample is vertically suspended, a fixing seat 16 is provided on the furnace cover 14 in this embodiment. The fixing seat 16 is filled with a fiber heat insulation block 18, and a guide sleeve 17 for the high-temperature resistant wire 19 to pass through is provided on the fixing seat 16.

[0024] To facilitate the measurement of the heating temperature of the test sample, an electric furnace temperature-measuring thermocouple 13 for measuring the temperature of the furnace chamber of the electric furnace 11 is installed at the furnace cover 14 through a thermocouple fixing seat 15.

[0025] To make the test sample accurately fall into the calorimetric block when it falls, an adjustable-height adjusting foot 1 is installed at the bottom of the main control cabinet 2, and a spirit level 4 is installed on the main control cabinet 2. Through the setting of the spirit level 4 and the adjusting foot 1, it is convenient to adjust the instrument to a horizontal state.

[0026] To facilitate the operation and display of relevant parameters, an instrument panel 3 is provided on the main control cabinet 2, and control buttons and a display module are provided on the instrument panel 3.

[0027] The high-temperature specific heat capacity tester of the present utility model can not only be used for bulk specimens, but also for the determination of the specific heat capacity of powder specimens. When measuring the powder specimens, the powder specimens can be injected into a box body, and the box body can be suspended and heated and subsequent tests can be carried out in the above-mentioned manner. According to the collected data and the mass and specific heat capacity of the box body obtained by pre-testing, the specific heat capacity of the powder specimens can be calculated. The box body can be made of different materials according to the experimental temperature, such as copper, stainless steel, graphite, etc.

[0028] With the help of the teachings present in the foregoing specification and the associated drawings, those skilled in the art to which the present utility model pertains will envision numerous modifications and other embodiments of the present utility model. Accordingly, it is to be understood that the present utility model is not limited to the specific embodiments disclosed, and that modifications and other embodiments are regarded as included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. A high-temperature specific heat capacity tester, comprising a main control cabinet (2), characterized in that: It also includes a heating device, a connecting sleeve (20), and a detection device. The heating device is fixedly installed on the detection device through the connecting sleeve (20), and the detection device is fixedly installed on the main control cabinet (2). The heating device includes an electric furnace (11). A heating furnace cavity that penetrates up and down is provided in the middle of the electric furnace (11). A furnace cover (14) is provided at the upper port of the heating furnace cavity. A through hole is provided on the furnace cover (14). The test specimen (12) is suspended in the heating furnace cavity by a high-temperature resistant wire (19). The high-temperature resistant wire (19) passes through the through hole on the furnace cover (14) and is fixed. A furnace door (10) is provided at the lower port of the heating furnace cavity. The detection device includes an outer box body (5) connected to the connecting sleeve (20). A constant temperature and heat insulation shield (9) is installed inside the outer box body (5). A controllable temperature and heat insulation shield (24) is installed inside the constant temperature and heat insulation shield (9) through an insulating support (25). A calorimeter block (21) is installed inside the controllable temperature and heat insulation shield (24) through an insulating support (25). A cavity for accommodating the test specimen (12) is provided on the calorimeter block (21). Channels for the test specimen (12) to fall into the calorimeter block (21) are provided on the outer box body (5), the constant temperature and heat insulation shield (9), and the controllable temperature and heat insulation shield (24). An electric heating tube (23) and a thermocouple (22) for obtaining the temperature of the calorimeter block (21) are provided on the calorimeter block (21). A heating resistance wire is provided on the side wall of the controllable temperature and heat insulation shield (24). A thermopile (7) is provided between the heating resistance wire and the calorimeter block (21). The heating resistance wire adjusts the heating temperature according to the temperature difference data measured by the thermopile (7) to make the temperature of the heating resistance wire consistent with the temperature of the calorimeter block (21). A copper tube (6) for introducing constant temperature hot water is wound on the side wall of the constant temperature and heat insulation shield (9).

2. The high-temperature specific heat capacity tester according to claim 1, wherein: Adiabatic end caps are respectively provided at both ends of the constant temperature and heat insulation shield (9) and the controllable temperature and heat insulation shield (24).

3. The high-temperature specific heat capacity tester according to claim 1, characterized in that: A cover (8) is provided at the inlet of the calorimeter block (21).

4. A high-temperature specific heat capacity tester according to claim 1, characterized in that: A fixing seat (16) is provided on the furnace cover (14). A fiber heat insulation block (18) is filled in the fixing seat (16). A guide sleeve (17) for the high-temperature resistant wire (19) to pass through is provided on the fixing seat (16).

5. The high-temperature specific heat capacity tester according to claim 1, wherein: The high-temperature resistant wire (19) is a nickel-chromium wire.

6. The high-temperature specific heat capacity tester according to claim 1, characterized in that: An electric furnace temperature measuring thermocouple (13) for measuring the temperature of the furnace cavity of the electric furnace (11) is installed at the furnace cover (14) through a thermocouple fixing seat (15).

7. The high-temperature specific heat capacity tester according to claim 1, wherein: Adjustable feet (1) are installed at the bottom of the main control cabinet (2). A spirit level (4) is installed on the main control cabinet (2).

8. The high-temperature specific heat capacity tester according to claim 1, wherein: An instrument panel (3) is provided on the main control cabinet (2). Control buttons and a display module are provided on the instrument panel (3).

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