CN219267166U - Teaching experiment device for measuring decomposition temperature and decomposition rate of common chemical substances - Google Patents
Teaching experiment device for measuring decomposition temperature and decomposition rate of common chemical substances Download PDFInfo
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- CN219267166U CN219267166U CN202320524949.6U CN202320524949U CN219267166U CN 219267166 U CN219267166 U CN 219267166U CN 202320524949 U CN202320524949 U CN 202320524949U CN 219267166 U CN219267166 U CN 219267166U
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Abstract
The utility model discloses a teaching experiment device for measuring the decomposition temperature and the decomposition rate of common chemical substances, which belongs to the technical field of experimental equipment and aims to solve the problem that the conventional experiment device cannot measure the decomposition temperature and the decomposition rate of the common chemical substances, and the teaching experiment device comprises a measuring cup containing a liquid medium, wherein the measuring cup is arranged on a precise electronic scale, a test tube is movably clamped at an opening of the measuring cup, the chemical substances are contained in the test tube, the bottom end of the test tube extends into the liquid medium in the measuring cup, a plurality of temperature sensors are arranged in the side wall in the measuring cup, a heating device is arranged at the bottom in the measuring cup, and the precise electronic scale and the temperature sensors are connected with a data acquisition instrument; the measuring cup is internally provided with the heating device, and is placed on the precise electronic scale, and the data of the temperature sensor and the precise electronic scale in the measuring cup are collected through the data acquisition instrument, so that the decomposition temperature and the decomposition rate of the chemical substance to be measured are obtained.
Description
Technical Field
The utility model relates to the technical field of experimental equipment, in particular to a teaching experiment device for measuring decomposition temperature and rate of common chemical substances.
Background
With the deepening of new course teaching reform, the requirements on chemical teaching experiments are gradually increased, and the chemical experiments are important means for students to acquire knowledge, excite interests and culture capacity. The chemical teacher can better exert the effectiveness of classroom teaching by fully utilizing experimental teaching. However, in the practical process of chemical experiment teaching, problems exist in terms of both concept and practical operation. The development of high school chemical experiments is also subject to many limitations due to the existing experimental conditions in various regions. For example, the chemical sodium and sodium compounds of the senior high school are very important contents in common senior high school chemistry and are the most important contents encountered by a student of the senior high school just entering into the school, the effective development of the part of chemical experiments has extremely profound influence on the students, the experiment teaching of the senior high school chemical teachers in the chemical department also has great influence on the concept and habit, and when the experiments cannot be successful, part of teachers can only hold books and experiences, so that the students can remember hard backs.
The existing experimental device for comparing the thermal stability of sodium carbonate and sodium bicarbonate can only qualitatively compare the thermal stability of sodium carbonate and sodium bicarbonate, and after modification, the thermal stability of other similar substances can also be compared, but the decomposition temperature and the decomposition rate of common substances cannot be measured, and some inherent defects still exist.
Disclosure of Invention
Aiming at the problems in the prior art, the utility model provides a teaching experiment device for measuring the decomposition temperature and the decomposition rate of common chemical substances, which solves the problem that the conventional experiment device cannot measure the decomposition temperature and the decomposition rate of the common chemical substances.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides a survey common chemical decomposition temperature and teaching experimental apparatus of speed, it includes the graduated flask that holds liquid medium, and the graduated flask is placed on accurate electronic scale, and the opening part activity of graduated flask presss from both sides the test tube, holds the chemical substance in the test tube, and in the bottom of test tube stretches into the liquid medium in the graduated flask, be provided with a plurality of temperature sensor in the lateral wall in the graduated flask on, the bottom in the graduated flask is provided with heating device, accurate electronic scale and temperature sensor all link to each other with the data acquisition appearance.
The measuring cup is internally provided with the heating device, and is placed on the precise electronic scale, and the data of the temperature sensor and the precise electronic scale in the measuring cup are collected through the data acquisition instrument, so that the decomposition temperature and the decomposition rate of the chemical substance to be measured are obtained.
Further, the heating device comprises a heating wire arranged at the inner bottom end of the measuring cup, the heating wire is electrically connected with a temperature adjusting knob, and the temperature adjusting knob is connected with an external power supply.
In this embodiment, heating device includes the heater strip, and the heater strip links to each other with the knob that adjusts the temperature, adopts above-mentioned scheme, through the liquid in the heater strip heating graduated flask to through liquid heating test tube, and then provide the required temperature of chemical substance decomposition.
Further, a heat insulation cover plate is arranged at the opening of the measuring cup, and a clamping device for clamping the test tube is arranged on the heat insulation cover plate; the bottom end of the test tube passes through the heat-insulating cover plate and is reserved in the liquid medium of the measuring cup.
In this embodiment, be provided with thermal-insulated apron on the graduated flask, be provided with clamping device on the thermal-insulated apron, adopt above-mentioned scheme, seal the graduated flask through thermal-insulated apron, prevent that the interior liquid of graduated flask from radiating too fast to through clamping device centre gripping test tube on thermal-insulated apron.
Further, the clamping device comprises two test tube clamps arranged in opposition, and the two test tube clamps arranged in opposition clamp the test tube.
In this embodiment, clamping device is including two test tube clamps that set up in opposition, adopts above-mentioned scheme, and two test tube clamps set up in opposition to the centre gripping test tube prevents that the test tube from dropping from thermal-insulated apron on the graduated flask.
Further, the test tube clamp comprises a clamping circular ring, semicircular fixing columns are arranged at two ends of the clamping circular ring, and fixing nuts are sleeved on the two oppositely arranged fixing columns.
In this embodiment, the test tube clamp includes centre gripping ring and fixed column, and the cover is equipped with the nut on the fixed column, adopts above-mentioned scheme, establishes two opposite fixed columns through the nut cover to make the centre gripping ring centre gripping test tube of opposition setting on thermal-insulated apron, prevent that the test tube from falling from thermal-insulated apron.
Further, the diameter of the fixing post is tapered from one side near the clamping ring to the other side.
In this embodiment, the diameter of fixed column is from one side to the opposite side convergent, adopts above-mentioned scheme, and the fixed column of convergent makes things convenient for the nut to fix to centre gripping test tube.
Further, a heat insulation pad is arranged between the measuring cup and the precise electronic scale.
In this embodiment, be provided with the heat insulating mattress between measuring glass and the accurate electronic scale, adopt above-mentioned scheme, the heat insulating mattress can isolate the temperature transmission between measuring glass and the accurate electronic scale, prevents that the measuring glass after the heating from influencing accurate electronic scale.
Further, a stirring device is arranged in the measuring cup.
In this embodiment, be provided with agitating unit in the graduated flask, adopt above-mentioned scheme, agitating unit can stir the liquid medium in the graduated flask, realizes the even heating of liquid medium.
The utility model discloses a teaching experiment device for measuring decomposition temperature and rate of common chemical substances, which has the beneficial effects that:
the heating device and the temperature sensor are arranged in the measuring cup, the measuring cup is placed on the precise electronic scale, the heat-insulating cover plate of the measuring cup clamps the test tube through the clamping component, after the chemical substance to be measured is poured into the test tube, the heating device is used for heating the measuring cup, and the data acquisition instrument can be used for collecting the data of the temperature sensor and the precise electronic scale in the measuring cup, so that the decomposition temperature and the decomposition rate of the chemical substance to be measured are obtained.
Drawings
FIG. 1 is a schematic diagram of a teaching experiment device for measuring decomposition temperature and rate of common chemical substances.
Fig. 2 is a schematic structural view of the heat insulation cover plate of the present utility model.
Wherein, 1, measuring cup; 2. a precision electronic scale; 3. a test tube; 4. a temperature sensor; 5. a data acquisition instrument; 6. a heating wire; 7. a temperature adjustment knob; 8. a heat insulating cover plate; 9. a clamping device; 901. a test tube clamp; 902. clamping the circular ring; 903. fixing the column; 904. a fixing nut; 10. a heat insulating mat; 11. and a stirring device.
Detailed Description
While specific embodiments of the present utility model have been described in order to facilitate understanding of the present utility model by those skilled in the art, it should be apparent that the present utility model is not limited to the scope of the specific embodiments, and that all the utility models which make use of the inventive concept are within the spirit and scope of the present utility model as defined and defined by the appended claims to those skilled in the art.
Example 1
Referring to fig. 1, a schematic structural diagram of a teaching experiment device for determining decomposition temperature and rate of common chemical substances in this embodiment is provided, which aims to solve the problem that the conventional experiment device cannot determine the decomposition temperature and rate of common chemical substances, and detailed description will be given below of specific structure in this embodiment.
The utility model provides a survey common chemical decomposition temperature and teaching experimental apparatus of speed, its includes that the holding has the measuring glass 1 of liquid medium, and measuring glass 1 is placed on accurate electronic scale 2, and measuring glass 1's opening part activity clamp holds test tube 3, holds the chemical in the test tube 3, and in the bottom of test tube 3 stretched into the liquid medium in measuring glass 1.
Specifically, be provided with a plurality of temperature sensor 4 in the lateral wall in the graduated flask 1 in, the bottom in the graduated flask 1 is provided with heating device, and accurate electronic scale 2 and temperature sensor 4 all link to each other with data acquisition appearance 5.
In this embodiment, the liquid medium is an existing high temperature resistant liquid, such as diethanolamine, sulfolane, liquid sodium chloride, etc., the temperature sensor 4 is an existing high temperature resistant temperature sensor, the specific model of which is PT-100, and the temperature sensor 4 is disposed on the inner wall of the measuring cup 1, and may be plural, in this embodiment, 6 temperature sensors are disposed uniformly on the inner wall of the measuring cup 1.
The data acquisition instrument 5 adopts the existing Agilent data acquisition instrument, the specific model is 34970A/34972A, the precise electronic balance 2 adopts the existing precise electronic balance, and the specific model is LS1200.
According to the utility model, a heating device and a temperature sensor 4 are arranged in a measuring cup 1, the measuring cup 1 is placed on a precise electronic scale 2, a test tube 3 is movably clamped at the opening of the measuring cup 1, chemical substances (such as sodium carbonate or sodium bicarbonate) to be measured are contained in the test tube 3, the measuring cup 1 is heated by the heating device, and a data acquisition instrument 5 can collect data of the temperature sensor 4 and the precise electronic scale 2 in the measuring cup, so that the decomposition temperature and the decomposition rate (decomposition rate=mass difference of chemical substances before and after the test/test time) of the chemical substances to be measured are obtained.
Specifically, heating device includes the heater strip 6 that sets up in the bottom in measuring cup 1, and heater strip 6 and temperature adjustment knob 7 electrical property link to each other, and temperature adjustment knob 7 links to each other with external power source.
In this embodiment, the temperature adjusting knob 7 adopts the existing knob temperature control switch, the model is WK001, the input end of the temperature adjusting knob 7 is connected with the power supply, the output end is connected with the heating wire 6, and the liquid medium in the measuring cup 1 is heated by the heating wire 6, so that the test tube 3 is heated by the liquid medium, and the temperature required by the decomposition of chemical substances is further provided.
Specifically, a heat insulation pad 10 is arranged between the measuring cup 1 and the precision electronic scale 2.
In this embodiment, the heat insulation pad 10 can insulate the temperature transmission between the measuring cup 1 and the precision electronic scale 2, and prevent the heated measuring cup 1 from affecting the precision electronic scale 2.
Specifically, a stirring device 11 is provided in the measuring cup 1.
In this embodiment, the stirring device 11 adopts an existing stirring rod, and the stirring rod can stir the liquid medium in the measuring cup 1 to realize uniform heating of the liquid medium.
Example 2
Referring to fig. 2, a schematic structural diagram of a clamping device and a heat insulation cover plate according to the present embodiment is provided, which aims to solve the problem that the existing test device cannot measure the decomposition temperature and the decomposition rate of common substances.
The opening part of the measuring cup 1 is provided with a heat insulation cover plate 8, the heat insulation cover plate 8 is provided with a clamping device 9 used for clamping the test tube 3, and the bottom end of the test tube 3 passes through the heat insulation cover plate 8 to be reserved in the liquid medium of the measuring cup 1.
Specifically, the clamping device 9 includes two test tube clamps 901 arranged in opposition, and the two test tube clamps 901 arranged in opposition clamp the test tube 3.
In this embodiment, the heat dissipation of liquid medium in the measuring cup 1 is sealed through the heat insulating cover plate 8 to measuring cup 1 prevents that liquid medium in the measuring cup from radiating too fast to through clamping device 9 centre gripping test tube 3 on heat insulating cover plate 8, clamping device 9 is two test tube clamps 901 of opposition setting, and two test tube clamps 901 opposition setting, thereby centre gripping test tube 3 on measuring cup 1 prevents that test tube 3 from coming off from heat insulating cover plate 8.
Specifically, the test tube holder 901 includes a clamping ring 902, semicircular fixing columns 903 are provided at two ends of the clamping ring 902, and fixing nuts 904 are sleeved on the two oppositely arranged fixing columns 903.
Specifically, the diameter of the fixing post 903 tapers from one side near the clamping ring 902 to the other.
In this embodiment, two opposite fixing posts 903 are sleeved by nuts 904, so that the opposite clamping rings 902 clamp the test tube 3 on the heat insulation cover plate 8, and prevent the test tube 3 from falling off from the heat insulation cover plate 8.
Moreover, the two fixing columns 903 are tapered, the tapered fixing columns 903 are convenient for fixing the fixing nuts 904, the fixing nuts 904 are sleeved on the two opposite fixing columns 903, and the fixing nuts are screwed from one end to the other end, so that the distance between the two opposite clamping rings 902 is shortened, and the test tube 3 is clamped.
The teaching experiment device for measuring the decomposition temperature and the decomposition rate of common chemical substances comprises the following working principles:
in practical application, referring to fig. 1-2, when the utility model is used, firstly, several temperature working conditions to be explored are formulated.
Then, in the experimental process, a certain amount of chemical substances (such as sodium carbonate or sodium bicarbonate) to be measured is put into the test tube 3, the temperature is set to be a first temperature value through the temperature adjusting knob 7, the temperature values collected by the 6 temperature sensors 4 and the mass value of the precision electronic scale 2 are collected by the data collector 5 at a certain test rate, such as 1 s/time, after a period of measurement, when the weight value of the precision electronic scale 2 is not changed any more, the decomposition can be considered to be finished, and the collected values are taken out for analysis.
There are two cases: (1) The mass value measured by the precision electronic scale 2 is not changed all the time, and it can be considered that the chemical substance is not decomposed at this temperature; (2) The mass value measured by the precision electronic scale 2 is reduced, and the reaction rate at the temperature can be calculated by using the formula: poor quality/test time before and after testing.
Then, if the first case described above occurs: the chemical substance is not decomposed, the temperature is set to be a second temperature value by adopting the temperature adjusting knob 7, the temperature values acquired by the 6 temperature sensors 4 and the mass value of the precise electronic scale 2 are collected by adopting the data acquisition instrument 5 at a certain test rate, for example, 1 s/time, after a period of time is measured, when the weight value of the precise electronic scale 2 is not changed any more, the decomposition can be considered to be finished, and the acquired value is taken out for analysis.
There are two cases as in the first experiment: (1) The mass value measured by the precision electronic scale 2 is not changed all the time, and it can be considered that the chemical substance is not decomposed at this temperature; (2) The mass value measured by the precision electronic scale 2 is reduced, and the reaction rate at the temperature can be calculated by using the formula: poor quality/test time before and after testing.
Finally, and so on until the experiment is finished, and the chemical substances are decomposed.
Although specific embodiments of the utility model have been described in detail with reference to the accompanying drawings, it should not be construed as limiting the scope of protection of the present patent. Various modifications and variations which may be made by those skilled in the art without the creative effort are within the scope of the patent described in the claims.
Claims (8)
1. A teaching experiment device for measuring decomposition temperature and rate of common chemical substances is characterized in that: comprises a measuring cup (1) containing liquid medium; the measuring cup (1) is arranged on the precise electronic scale (2);
a test tube (3) is movably clamped at the opening of the measuring cup (1), chemical substances are contained in the test tube (3), and the bottom end of the test tube (3) stretches into a liquid medium in the measuring cup (1);
a plurality of temperature sensors (4) are arranged in the side wall in the measuring cup (1), and a heating device is arranged at the bottom in the measuring cup (1); the precise electronic scale (2) and the temperature sensor (4) are connected with the data acquisition instrument (5).
2. The teaching experiment device for determining decomposition temperature and rate of common chemical substances according to claim 1, wherein: the heating device comprises a heating wire (6) arranged at the inner bottom end of the measuring cup (1), the heating wire (6) is electrically connected with a temperature adjusting knob (7), and the temperature adjusting knob (7) is connected with an external power supply.
3. The teaching experiment device for determining decomposition temperature and rate of common chemical substances according to claim 1, wherein: the opening of the measuring cup (1) is provided with a heat-insulating cover plate (8), and the heat-insulating cover plate (8) is provided with a clamping device (9) for clamping the test tube (3); the bottom end of the test tube (3) passes through the heat insulation cover plate (8) to be reserved in the liquid medium of the measuring cup (1).
4. A teaching experiment apparatus for determining decomposition temperature and rate of common chemical substances according to claim 3, wherein: the clamping device (9) comprises two test tube clamps (901) which are arranged oppositely, and the two test tube clamps (901) which are arranged oppositely clamp the test tube (3).
5. The teaching experiment device for measuring decomposition temperature and rate of common chemical substances according to claim 4, wherein: the test tube clamp (901) comprises a clamping circular ring (902), semicircular fixing columns (903) are arranged at two ends of the clamping circular ring (902), and fixing nuts (904) are sleeved on the two oppositely arranged fixing columns (903).
6. The teaching experiment device for measuring decomposition temperature and rate of common chemical substances according to claim 5, wherein: the diameter of the fixing column (903) is gradually reduced from one side close to the clamping circular ring (902) to the other side.
7. The teaching experiment device for determining decomposition temperature and rate of common chemical substances according to claim 1, wherein: a heat insulation pad (10) is arranged between the measuring cup (1) and the precise electronic scale (2).
8. The teaching experiment device for determining decomposition temperature and rate of common chemical substances according to claim 1, wherein: a stirring device (11) is arranged in the measuring cup (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320524949.6U CN219267166U (en) | 2023-03-17 | 2023-03-17 | Teaching experiment device for measuring decomposition temperature and decomposition rate of common chemical substances |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320524949.6U CN219267166U (en) | 2023-03-17 | 2023-03-17 | Teaching experiment device for measuring decomposition temperature and decomposition rate of common chemical substances |
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| CN219267166U true CN219267166U (en) | 2023-06-27 |
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| CN202320524949.6U Active CN219267166U (en) | 2023-03-17 | 2023-03-17 | Teaching experiment device for measuring decomposition temperature and decomposition rate of common chemical substances |
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- 2023-03-17 CN CN202320524949.6U patent/CN219267166U/en active Active
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