CN108205341B - TMRad data testing device - Google Patents
TMRad data testing device Download PDFInfo
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- CN108205341B CN108205341B CN201611168460.0A CN201611168460A CN108205341B CN 108205341 B CN108205341 B CN 108205341B CN 201611168460 A CN201611168460 A CN 201611168460A CN 108205341 B CN108205341 B CN 108205341B
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- tmrad
- temperature
- thermocouple
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- sample
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/30—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature
- G05D23/32—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature with provision for adjustment of the effect of the auxiliary heating device, e.g. a function of time
Abstract
The invention discloses a TMRad data testing device, and relates to the technical field of chemical storage and transportation safety. The TMRad data testing device comprises a constant temperature oven, a container for placing a test sample, a data processor, an internal heating component and a controller. The internal heating component is arranged in the container for holding the test sample. The controller is respectively connected with the internal heating component and the data processor. Through the combined action of the arranged internal heating part and the controller, the rapid heating balance and the temperature detection of the sample center can be realized, so that the technical problems of inaccurate TMRad test data and system errors caused by large temperature difference between the test sample center and the sample wall surface in the test process are solved.
Description
Technical Field
The invention relates to the technical field of chemical storage and transportation safety, in particular to a TMRad data testing device.
Background
At present, it is widely recognized that dangerous chemicals such as peroxides and self-reactive substances tend to undergo decomposition reactions during storage and transportation, and the causes of the dangerous chemicals may be ambient temperature, humidity, static electricity, and the like. Wherein the ambient temperature may affect the rate of the decomposition reaction which will affect the rate of heat generation within the chemical package, and when the rate of heat generation is greater than the rate of heat dissipation from the package, heat build-up occurs within the package, which portion of heat further promotes the progress of the chemical reaction. The extreme case of this process is that when the packages are stacked on a large scale, the heat transfer process is similar to adiabatic, so under adiabatic conditions, it is important to examine the time for the decomposition reaction of the chemicals in the packages to reach the maximum reaction rate, i.e., the TMRad data, to guide the safe storage and transportation process of the chemicals.
In the testing of TMRad, the conventional method relies on ambient temperature to heat the sample until the sample temperature matches the ambient temperature and a timer is started. The method has a problem in that when a test sample is a solid or a high-viscosity liquid, there is a large difference between the temperature of the center of the sample and the temperature of the wall surface of the sample, so that a long equilibration time is required to make the temperature of the sample uniform as a whole. In the balancing process, wall parts of a plurality of samples with lower reaction temperature already start to react, so that the TMRad data test is inaccurate due to abnormal termination of the test, and the technical problem of system errors exists.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the TMRad data testing device which has accurate testing data and eliminates system errors.
The TMRad data testing device comprises a constant temperature oven, a container for placing a test sample, a data processor, an internal heating component and a controller. The internal heating component is arranged in the container for holding the test sample. The controller is respectively connected with the internal heating component and the data processor.
Through the combined action of the arranged internal heating part and the controller, the rapid heating balance and the temperature detection of the sample center can be realized, so that the technical problems of inaccurate TMRad test data and system errors caused by large temperature difference between the test sample center and the sample wall surface in the test process are solved.
Preferably, the internal heating member includes a heating rod, a thermocouple, and the thermocouple is disposed near the heating rod. The heating rod and the thermocouple are fixed through a position controller. The controller is respectively connected with the thermocouple and the heating rod.
The local temperature of the position where the thermocouple arranged in the sample is detected is compared with the preset temperature of the ring mirror in the constant-temperature oven, and the power of the heating rod is controlled by the controller according to the difference value between the local temperature fed back from the thermocouple and the preset environment temperature. Therefore, the local temperature inside the sample is changed along with the change of the environmental temperature in the constant-temperature oven, and the synchronous heating of the inside and the outside of the sample is realized.
Preferably, the controller comprises a temperature acquisition unit, a power control unit and a timing unit; the temperature acquisition unit is respectively connected with the power control unit and the timing unit.
The temperature acquisition unit of the controller can realize automatic acquisition of the temperature value of the thermocouple and is connected with the power control unit to realize data transmission. The power control unit receives the data from the temperature acquisition unit and compares the data with the preset test environment temperature of the constant-temperature oven, and the heating power of the heating rod is automatically adjusted. The timing unit realizes automatic timing in the testing process and automatically feeds back the testing time and the time point of internal and external balance of the sample temperature to the data processor.
Preferably, the position controller comprises a cross-shaped mounting frame, and the cross-shaped mounting frame is provided with array mounting holes for fixing the heating rod and the thermocouple respectively. The mounting hole for fixing the thermocouple is disposed near the mounting hole for fixing the heating rod.
The position controller with the cross-shaped mounting frame structure and the array mounting holes arranged on the mounting frame can ensure that a plurality of heating rods and a plurality of thermocouples are uniformly arranged inside a sample, so that the sample can be uniformly heated, and no obvious temperature gradient and local hot spots of the sample can be generated, thereby further ensuring that the inside and the outside of the test sample are synchronously heated.
Preferably, the material of the heating rod is stainless steel.
The stainless steel heating rod can ensure high heating efficiency, and further shorten the internal and external temperature balance time of the test sample in the test process.
Preferably, the constant temperature oven is a hot air circulation constant temperature oven.
The hot air circulation constant temperature oven has the characteristics of high radiation coefficient, low energy consumption, fast temperature rise, good heat preservation performance and the like.
Preferably, the container for holding the test specimen includes a test specimen jar having an opening at the top.
The internal heating part can be inserted into the test sample from the top opening of the test sample tank, so that the internal heating of the test sample is ensured.
Preferably, a bracket for placing the test sample tank is arranged in the constant-temperature oven.
The TMRad data testing device provided by the invention comprises a controller and an internal heating component. Through the combined action of the arranged internal heating part and the controller, the rapid heating balance and the temperature detection of the sample center can be realized, so that the technical problems of inaccurate TMRad test data and system errors caused by large temperature difference between the test sample center and the sample wall surface in the test process are solved.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
fig. 1 is a schematic diagram of a TMRad data testing apparatus according to an embodiment of the present invention.
FIG. 2 is a schematic view of an internal heating element according to an embodiment of the present invention.
Fig. 3 is a connection diagram of the internal units of the controller according to the embodiment of the present invention.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale. The reference numerals in the figures denote: 1. a constant temperature oven; 2. an internal heating member; 21. a heating rod; 22. a thermocouple; 23. a position controller; 231. a mounting frame; 232. a heating rod mounting hole; 233. a thermocouple mounting hole; 3. a test sample tank; 4. a controller; 41. a temperature acquisition unit; 42. a power control unit; 43. a timing unit; 5. a support; 6. a data processor.
Detailed Description
The invention will be described in further detail with reference to the drawings and specific examples, without thereby limiting the scope of the invention.
As shown in fig. 1, the TMRad data testing apparatus according to the embodiment of the present invention includes a constant temperature oven 1, a test sample tank 3, a data processor 6, an internal heating unit 2, and a controller 4. The internal heating element 2 is provided with an opening insert for receiving the internal heating element from the test sample canister 3. The controller 4 is connected to the internal heating unit 2 and the data processor 6, respectively.
Through the combined action of the arranged internal heating part and the controller, the rapid heating balance and the temperature detection of the sample center can be realized, so that the technical problems of inaccurate TMRad test data and system errors caused by large temperature difference between the test sample center and the sample wall surface in the test process are solved.
As shown in fig. 2, the internal heating member 2 in the embodiment of the present invention includes a heating rod 21, a thermocouple 22, and the thermocouple 22 is disposed near the heating rod 21, and both the heating rod 21 and the thermocouple 22 are fixed by a positioner 3. The controller 4 is connected to the thermocouple 22 and the heating rod 21, respectively.
The local temperature of the position where the thermocouple arranged in the sample is detected is compared with the preset temperature of the ring mirror in the constant-temperature oven, and the power of the heating rod is controlled by the controller according to the difference value between the local temperature fed back from the thermocouple and the preset environment temperature. Therefore, the local temperature inside the sample is changed along with the change of the environmental temperature in the constant-temperature oven, and the synchronous heating of the inside and the outside of the sample is realized.
As shown in fig. 3, preferably, the controller 4 in the embodiment of the present invention includes a temperature acquisition unit 41, a power control unit 42, and a timing unit 43; the temperature acquisition unit 41 is connected to the power control unit 42 and the timing unit 43, respectively.
The temperature acquisition unit 41 of the controller 4 can realize automatic acquisition of the temperature value of the thermocouple 22 and realize data transmission by being respectively connected with the power control unit 42 and the data processor 6. The power control unit 42 receives the data from the temperature acquisition unit 41, compares the data with the preset test environment temperature of the constant temperature oven 1, and automatically adjusts the heating power of the heating rod 21. The timing unit 43 realizes automatic timing during the test and automatically feeds back the test time and the time point of the internal and external balance of the sample temperature to the data processor 6.
As shown in fig. 2, the position controller 3 in the embodiment of the present invention preferably includes a cross-shaped mounting frame 31, and the cross-shaped mounting frame is provided with array mounting holes 321 and 322 for fixing the heating rod and the thermocouple, respectively. A mounting hole 322 for fixing a thermocouple is disposed near the mounting hole 321 for fixing the heating rod.
The position controller with the cross-shaped mounting frame structure and the array mounting holes arranged on the mounting frame can ensure that a plurality of heating rods and a plurality of thermocouples are uniformly arranged inside a sample, so that the sample can be uniformly heated, and no obvious temperature gradient and local hot spots of the sample can be generated, thereby further ensuring that the inside and the outside of the test sample are synchronously heated.
Preferably, the material of the heating rod 21 in the embodiment of the present invention is stainless steel.
The stainless steel heating rod can ensure high heating efficiency, and further shorten the internal and external temperature balance time of the test sample in the test process.
Preferably, the constant temperature oven 1 in the embodiment of the present invention is a hot air circulation constant temperature oven.
The hot air circulation constant temperature oven has the characteristics of high radiation coefficient, low energy consumption, fast temperature rise, good heat preservation performance and the like.
Preferably, the container for holding the test sample in the embodiment of the present invention includes a test sample tank having an opening at the top.
The internal heating part can be inserted into the test sample from the top opening of the test sample tank, so that the internal heating of the test sample is ensured.
Preferably, the constant temperature oven 1 in the embodiment of the present invention is provided with a bracket 5 for mounting the test sample canister.
The working process of the TMRad data testing device in the embodiment of the invention is as follows:
first, a sample is loaded in a test sample tank 3, an internal heating part 2 is inserted from an opening 31 of the sample tank 3, and the door of the hot air circulation constant temperature oven 1 is closed after the test sample tank 3 is placed on a central support 5.
Then, the environmental temperature of the sample TMRad is set, and the internal heating part 2 is ensured to heat the inside of the sample simultaneously through the action of the controller 4 respectively connected with the heating rod 21 and the thermocouple 22 while the circulating air in the hot air circulation constant temperature oven 1 heats the testing environmental temperature.
The temperature acquisition unit 41 of the controller 4 can realize automatic acquisition of the temperature value of the thermocouple and realize data transmission by being respectively connected with the power control unit 42 and the data processor 6. The power control unit 42 receives the data from the temperature acquisition unit 41, compares the data with the preset test environment temperature of the constant temperature oven 1, and automatically adjusts the heating power of the heating rod. The timing unit 43 realizes automatic timing during the test and automatically feeds back the test time and the time point of the internal and external balance of the sample temperature to the data processor 6.
The data processor 6 receives the data from the temperature acquisition unit and the data from the timing unit respectively to record a temperature rise curve of the sample, and automatically marks the time point of the internal and external balance of the temperature of the sample on the temperature rise curve.
Since the heating rod 21 and the thermocouple 22 in the inner heating member 2 are fixed by the position controller 23, the thermocouple 22 is arranged near the heating rod 21. The local temperature of the position where the thermocouple 22 arranged inside the sample is detected is compared with the preset ambient temperature inside the thermostatic oven 1, and the power of the heating rod 21 is controlled by the controller 4 according to the difference between the local temperature fed back from the thermocouple 222 and the preset test ambient temperature. Therefore, the local temperature inside the sample is changed along with the change of the environmental temperature in the constant-temperature oven, the synchronous heating inside and outside the sample is realized, the rapid temperature rise balance and the temperature detection of the center of the sample can be realized, and the technical problems of inaccurate TMRad test data and system errors caused by the large temperature difference between the center of the test sample and the wall surface of the sample in the test process are solved.
The position controller 23 includes a cross-shaped mounting frame 231, the cross-shaped mounting frame 231 is provided with array mounting holes for fixing the heating rod 21 and the thermocouple 22, respectively, and the mounting hole 233 for fixing the thermocouple 22 is arranged near the mounting hole 232 for fixing the heating rod 21.
The position controller with the cross-shaped mounting frame structure and the array mounting holes arranged on the mounting frame can ensure that a plurality of heating rods and a plurality of thermocouples are uniformly arranged inside a sample, thereby further ensuring that the inside and the outside of the test sample are synchronously heated to reach the set test environment temperature as soon as possible.
Because the heated air circulation constant temperature oven has the characteristics of high radiation coefficient, low energy consumption, quick temperature rise, good heat preservation performance and the like, the time for heating the inside and the outside of the test sample to reach the set test environment temperature is further shortened.
In the constant temperature process, when the temperature fed back by the thermocouple 22 arranged near the heating rod 21 in the internal heating part 2 is detected to be higher than the temperature of the preset test environment in the hot air circulation constant temperature oven 1, the self-reaction is considered to occur. At this time, the test environment temperature in the heated air circulation constant temperature oven 1 is adjusted according to the temperature feedback value of the thermocouple 22 in the sample, so that the test environment temperature and the sample temperature are synchronously raised. So as to ensure that the whole self-reaction process of the sample is an approximately adiabatic process.
During the whole test process, the data processor 6 receives the data from the temperature acquisition unit 41 and the data from the timing unit 43 in the controller 4, respectively, continuously records the temperature rise curve of the sample, and automatically marks the time point of the internal and external balance of the temperature of the sample on the temperature rise curve.
And finally, finding a maximum temperature rise rate point on the sample temperature rise curve of the data processor 6, wherein the corresponding time point is the end time of the TMRad test.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (8)
1. A TMRad data testing device comprises a constant-temperature oven, a container which is arranged in the constant-temperature oven and used for placing a test sample, and a data processor, and is characterized by further comprising an internal heating component and a controller; the internal heating part is arranged in the container for holding the test sample; the controller is respectively connected with the internal heating component and the data processor,
the internal heating part comprises a heating rod and a thermocouple; the thermocouple is arranged near the heating rod; the heating rod and the thermocouple are fixed through a position controller,
the position controller comprises a mounting rack which is arranged in a cross shape.
2. The TMRad data testing apparatus of claim 1, wherein the controller is coupled to the thermocouple and the heater bar, respectively.
3. The TMRad data testing apparatus of claim 1, wherein the controller comprises a temperature acquisition unit, a power control unit, and a timing unit.
4. The TMRad data testing apparatus of claim 1, wherein the mounting rack in the cross-shaped arrangement is provided with array mounting holes for fixing the heating rod and the thermocouple, respectively; the mounting hole for fixing the thermocouple is disposed near the mounting hole for fixing the heating rod.
5. The TMRad data testing apparatus of claim 1, wherein the heater bar is made of stainless steel.
6. The TMRad data testing apparatus of claim 1, wherein the constant temperature oven is a heated air circulation constant temperature oven.
7. The TMRad data testing apparatus of any one of claims 1 to 6, wherein the container for holding the test sample comprises a test sample tank having an opening at the top.
8. The TMRad data testing apparatus of claim 7, wherein a holder is provided in the incubator for holding the test sample canister.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611168460.0A CN108205341B (en) | 2016-12-16 | 2016-12-16 | TMRad data testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611168460.0A CN108205341B (en) | 2016-12-16 | 2016-12-16 | TMRad data testing device |
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| CN108205341A CN108205341A (en) | 2018-06-26 |
| CN108205341B true CN108205341B (en) | 2020-07-31 |
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| CN201161198Y (en) * | 2008-01-11 | 2008-12-10 | 黄永军 | Thermostatic test-tube stand |
| US7890219B2 (en) * | 2008-07-08 | 2011-02-15 | Hewlett-Packard Development Company, L.P. | Cooling fan with speed maintained during wait period despite decreasing temperature |
| CN202771280U (en) * | 2012-09-11 | 2013-03-06 | 成都图南电子有限公司 | Magnetic powder temperature range granulation thermostatic control system |
| CN203259904U (en) * | 2013-03-27 | 2013-10-30 | 国家电网公司 | Temperature control system for simulating standard oil sample preparation device of transformer |
| CN204705607U (en) * | 2015-06-16 | 2015-10-14 | 西安科技大学 | A kind of coal spontaneous combustion characteristic test is with certainly heating coal sample tank |
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