A heat-resistant test process quality change on-line measuring device

Abstract

The application discloses a kind of heat-resistant test process quality change on-line measuring device, including water cooler, water pipe, mass sensor, cooling jacket, support, force signal line, recorder, heating jacket, heat-resistant wire, test piece, heating wire, temperature signal line, temperature control box and windproof box, heating jacket is heated according to the set rate by program control, and the on-line continuous weighing of test is carried out using tensile type mechanical sensor, the on-line measurement of heat-resistant test process quality change is realized.The current heat-resistant test can only be endpoint measurement, lack of process parameters, test drug is smaller, the problem of high cost is solved.Advantages are: simple, fast, single test cost is lower, suitable for heat-resistant test process quality continuous measurement of various heat-resistant explosives.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of measurement, and relates to a measuring device, in particular to an online measuring device for quality change in a heat resistance test process, which is suitable for continuous measurement of quality change of heat-resistant explosives under the action of high temperature for a long time. BACKGROUND

[0002] Heat-resistant explosives are a kind of explosives that can be reliably used in high-temperature environments for a long time. Such explosives have a relatively high melting point or decomposition point, and therefore, the melting point or decomposition point is usually used as a basis for judging heat-resistant explosives. Explosives with a melting point above 200℃ are generally referred to as heat-resistant explosives. Heat-resistant explosives are currently mainly used in oil field perforation operations, and mixed explosives with RDX as the base are usually required to withstand 200℃ for 24 hours and still be reliable and practical.

[0003] From the historical development, the high-temperature resistance of heat-resistant explosives has gradually improved. In 1941, cyclotetramethylene tetranitramine (HMX) was separated from hexahydro-1, 3, 5-trinitro-1, 3, 5-triazine (RDX), and its thermal decomposition point is 287℃, which can be used as a heat-resistant energetic material. Jacks and Wing first synthesized 1, 3, 5-triamino-2, 4, 6-trinitrobenzene (TATB), and the most attractive feature of TATB is its low sensitivity and good heat resistance (thermal decomposition temperature > 300℃), which is mainly used in deep well blasting and insensitive explosives. In 1912, S. Reich first synthesized 2, 2', 4, 4', 6, 6'-hexanitrostilbene (HNS), which has good thermal stability (thermal decomposition temperature 315℃), and is mainly used in booster, flexible detonating cord and super deep well super high temperature perforating bullet main charge.

[0004] On the other hand, the application scenarios of heat-resistant explosives have also rapidly expanded, and with the rapid development of new equipment such as hypersonic weapons and space explosion separation devices, there is an urgent need to improve the heat resistance of heat-resistant explosives. When the warhead of a hypersonic weapon flies at supersonic or hypersonic speed, the wall surface near the warhead is subjected to high temperature due to aerodynamic heating, and the high-temperature air will continuously heat the low-temperature wall of the warhead, which poses a risk to the stability of the warhead explosive charge. For example, the light near-space air-to-surface missile anti-ship warhead to be launched by the military will face the influence of aerodynamic heating environment on the stability of the warhead charge. When designing the warhead, it is necessary to consider that the surface of the projectile is subjected to an aerodynamic heating environment with a temperature above 450℃ for more than 20 minutes, and when the speed reaches 8 Mach, the temperature of the head will be close to 1800℃ or above, and the temperature of other parts will also be above 600℃.

[0005] At present, the evaluation methods for the heat resistance of heat-resistant explosives are very limited, mainly including three types of micro-amount thermal decomposition test, oven test and heat resistance test.

[0006] The micro-thermal decomposition test includes micro-calorimetry and thermogravimetric analysis, and the test amount is generally in milligram level, which is mainly used for variable temperature test. The heat release and weight loss of the test sample under a certain heating rate are measured to characterize the heat resistance of heat-resistant explosives. This method can conveniently obtain the thermal decomposition temperature in the laboratory, which can guide the determination of the limit heat resistance. However, due to the very small amount of medicine, it cannot reflect the phenomenon that the heat resistance of heat-resistant explosives decreases significantly due to the heat accumulation caused by the slow heat release of heat-resistant explosives under a large amount of medicine. This method can also be used for constant temperature test, but due to the small amount of medicine, decomposition will not occur under the action of low temperature for a long time, and the error caused by small changes is very large. The baseline will deviate seriously in the long-term heating process, so the long-term thermal decomposition test of ≥24h is almost not carried out.

[0007] The temperature environment test of further enlarged medicine amount also uses an oven, such as aging test, temperature shock and temperature cycle environmental adaptability test. The test amount of this test method can include gram level to kilogram level, but the experimental temperature is very low. The temperature of aging test is generally 71℃, and the temperature of high temperature test in environmental adaptability test is 70℃. At this temperature, more attention is paid to the integrity of the test sample, whether cracks are generated or not, and the like. Therefore, the oven can be reused.

[0008] If the oven heating test is used, the following problems exist:

[0009] (1) The current oven temperature is low. If the test temperature is further increased, the decomposition temperature of heat-resistant single-element energetic materials can reach more than 400℃, and the test sample will have a high probability of combustion or explosion. The oven may become a consumable after each test, and the test cost is high.

[0010] (2) The internal volume of the oven is large. With the increase of the capacity, the energy required for heating the air bath is higher, and the power consumption will increase exponentially. The requirement for the cable is higher, and the test cost is also high.

[0011] (3) The oven is a closed environment, which can provide good environmental stability for mass measurement. However, if continuous weighing is required, the weighing unit needs to be placed in the oven, the cable layout is complex, and the heat resistance of the weighing unit is very high. At present, there is no measurement sensor that can withstand a high temperature environment of more than 150℃.

[0012] (4) The oven has a large volume and is not convenient to carry. For test samples with high power, a completely closed environment can accelerate the reaction rate of the test sample, cause more damage, and have a greater test safety risk.

[0013] In addition to the use of oven heating, reference to slow roasting test, the current a large number of heat resistance test using heating sleeve as heating element, its single cost less than 100 yuan, low cost, simple assembly, flexible temperature control, can meet the requirements of passing test, but also only as passing test, no process parameters, can only be weighed once before and after the end of the test. At the same time, the insulation material is selected as the air gap of the aluminum silicate cotton, which contains very fine glass fiber, and the operation process is very hard, which can cause itching and other symptoms.

[0014] In summary, the characteristics of the prior art are as follows:

[0015] (1) thermal decomposition test method is suitable for short time non-isothermal test, test drug amount is milligram level, and measurement precision is poor for long time heat resistance test;

[0016] (2) oven test method is suitable for low temperature test, test temperature is about 70 DEG C, and simple lifting test temperature causes higher test cost, power consumption and cable requirement, and the test is not convenient to arrange, and there is no suitable weighing unit;

[0017] (3) the existing heat resistance test method is suitable for passing test, the test cost is low. The temperature control is flexible, the assembly is simple, the speed is fast, it is suitable for different drug amount grades, but the process parameters are lack. It is not healthy for the operator. SUMMARY

[0018] In view of the defects or deficiencies of the prior art, the purpose of the present application is to provide a heat resistance test process quality change online measurement device, which uses a heating sleeve as a heating element, isolates the weighing element and uses a cooling jacket to prevent the weighing element from being too high in temperature, and measures the mass of the continuous measurement mass test piece and its change through suspension.

[0019] In order to achieve the above task, the present application adopts the following technical solutions:

[0020] A heat resistance test process quality change online measurement device, characterized in that it comprises a cold water machine, a water pipe, a mass sensor, a cooling jacket, a support, a force signal line, a recorder, a heating sleeve, a heat resistance wire, a test piece, a heating wire, a temperature signal line, a temperature control box and a windproof box, wherein:

[0021] The cold water machine is connected with the cooling jacket through the water pipe, the mass sensor is installed in the cooling jacket, and the water circulation is used to cool the mass sensor;

[0022] The mass sensor is suspended by the heat resistance wire at the lower part of the mass sensor, the upper end surface of the mass sensor is a fixed surface, and the lower end surface of the mass sensor is a stress surface;

[0023] The cooling jacket is a cylindrical hollow jacket, the upper end face of the jacket is detachable from the lower part, the upper end face and the lower part of the cooling jacket are connected with the water cooler, the upper end face of the cooling jacket is fastened to the bottom of the horizontal disc of the support, and the mass sensor is located on the lower bottom surface of the upper end face of the cooling jacket;

[0024] The support has three height-adjustable legs, the top is a horizontal disc, a universal level meter is installed on the top of the horizontal disc, the horizontal disc is adjusted to be horizontal by adjusting the legs of the support, and the cooling jacket is installed on the bottom of the horizontal disc;

[0025] The recorder is connected with the mass sensor through the force signal line, and is used for continuously recording the mass change data of the test piece measured by the mass sensor;

[0026] The heating jacket is a hollow cylindrical electric heating device with a cover, is connected with the temperature control box through a heating wire, the upper end cover of the heating jacket has a central through hole and an eccentric through hole, the heat-resistant wire passes through the central through hole of the upper end cover of the heating jacket and is connected with the test piece, the temperature signal line passes through the eccentric through hole of the upper end cover of the heating jacket, and in the heating jacket, the test piece is filled in the center of the heating jacket from bottom to top by filling the coarse-grained ceramic shell first and then filling the fine-grained ceramic shell;

[0027] The test piece is composed of an outer container and an inner container in a nested structure, wherein the outer container is a heat-resistant beaker without a cover, the inner container is an elongated heat-conducting cup, the inner container is hung on the mass sensor through a heat-resistant wire, the inner container is not in contact with the outer container, a temperature signal line is installed on the inner wall of the outer container, and a test sample is placed in the inner container;

[0028] One end of the temperature signal line is connected with the temperature control box, and the other end is a temperature sensor, the temperature sensor is installed on the inner wall of the outer container of the test piece;

[0029] The temperature control box can set a heating rate, a peak temperature and a constant temperature time, continuously measures the temperature in the test piece through the temperature signal line, and adjusts the heating power of the heating jacket through the heating wire to control the test piece to reach the set temperature;

[0030] The windproof box is a plate type closed structure or an explosion-proof test room, the internal wind speed during the test is not more than 0.2 m / s, the test temperature is room temperature to 500 DEG C, the constant temperature time of the heat resistance test is 0 h to 168 h, and the ratio of the mass of the test sample to the sum of the mass of the heat-resistant wire and the inner container is not less than 1 during the test.

[0031] The heat-resistant test process quality change on-line measuring device of the application realizes on-line measurement of the heat-resistant test process quality change by controlling the heating jacket to increase temperature according to the set rate and using the tensile mechanical sensor to continuously weigh the test on-line.

[0032] Compared with the prior art, the technical innovation brought by the application is embodied in the following aspects:

[0033] (1) The heat-resistant test sample quality continuous measuring device suitable for the heat-resistant test is designed for the first time, the on-line measurement of the heat-resistant test process parameters is realized, and the problem that the current heat-resistant test can only be determined at the end point is solved;

[0034] (2) The heating jacket and the ceramic tube are designed, the heating control is more sensitive, the heating efficiency is higher, the economy is good, and the test cost is low;

[0035] (3) The hierarchical ceramic tube is used as the filling and heat preservation material, and the occupational hazards are small;

[0036] (4) The suspended quality measurement is adopted, the influence of the heating device on the quality is avoided, and the measurement precision is high. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 is a schematic block diagram of the components of the heat-resistant test process quality change on-line measuring device of the application;

[0038] Figure 2 is a schematic diagram of the positional relationship of the components of the test piece;

[0039] Figure 3 is a temperature curve measured in the test of example 2;

[0040] Figure 4 is a mass percentage change curve measured in example 2;

[0041] Figure 5 is a temperature curve measured in the test of example 3;

[0042] Figure 6 is a mass percentage change curve measured in example 3;

[0043] The marks in the figure respectively represent: 1, a cold water machine, 2, a water pipe, 3, a mass sensor, 4, a cooling jacket, 5, a support, 6, a force signal line, 7, a recorder, 8, a heating jacket, 9, a heat-resistant wire, 10, a test piece, 11, a heating wire, 12, a temperature signal line, 13, a temperature control box, 14, a windproof box, 10-1, an outer container, and 10-2, an inner container.

[0044] The application will be further described in detail below in combination with the drawings and examples, DETAILED DESCRIPTION

[0045] The design idea of the present application is as follows: firstly, the heating element is determined, according to the heat transfer principle and the electric heating conversion efficiency, the air bath is used for heating, which can realize more accurate temperature loading, since air is a poor conductor of heat, the air content in the air bath will affect the uniformity and stability of the temperature environment of the test sample on the one hand, and a larger air bath also needs a longer heating time and a larger heating power, especially for heat resistance test, the heating temperature is higher, and the test time is longer, which is more important. Therefore, a balance design must be made between the two. Considering the economy, a heating jacket is used as the heating element, in order to adapt to different dosage test samples, and at the same time, the influence of air bath is considered, a multi-level hollow ceramic tube is used as the supporting material, so as to place the test sample in the center of the heating jacket. The hollow ceramic tube has the characteristics of excellent heat resistance and good temperature stability, the air contained in the hollow structure can provide air bath atmosphere, effectively control the air content in the whole heating jacket, and realize high efficiency heating.

[0046] Secondly, the continuous mass measurement principle problem is solved, since the sum of the mass of the heating jacket, ceramic tube, test sample container and the like is much larger than the mass of the test sample, if a simple method of weighing the whole device is used, the test accuracy is difficult to guarantee, because according to the thermal decomposition kinetics principle of energetic materials, the thermal decomposition of energetic materials will go through the stages of starting, acceleration, deceleration and key, among which once reaching the acceleration stage, the subsequent stage will often occur instantaneously and uncontrollably. Therefore, for heat resistance test, the more important thing is the continuous mass measurement in the starting stage, the reaction depth of this part is very low, that is, the mass change of the test sample is very small, and the mass sensor, test sample, test sample container and heat resistance wire mass ratio need to be designed.

[0047] Thirdly, the mass measurement implementation problem is solved, among different principles of mass sensors such as tension type, pressure type and charge type, based on the heat conduction principle, the terrain adaptability is comprehensively considered, a tension type mass sensor is designed, and the adaptability of different terrains is realized through the bracket with adjusting function.

[0048] Finally, considering the health problem of personnel operation, the ceramic tube is used as the heat preservation material, which not only has sufficient air bath heat preservation, but also avoids the stimulation to the hands. In order to solve the universality of the laboratory scale small explosion tower and large space laboratory, the aerodynamics principle is considered, the windproof box is designed, which is suitable for various test environments.

[0049] The following is the example given by the inventor, need to explain that the following examples are the preferred examples of the present application, the present application is not limited to the following examples. Those skilled in the art should understand that the simple change on the basis of the technical scheme of the present application, and the addition or equivalent replacement of technical features, all belong to the protection scope defined in the claims of the present application.

[0050] Example 1:

[0051] This embodiment gives a kind of heat-resistant test process quality change on-line measuring device, including water cooler 1, water pipe 2, mass sensor 3, cooling jacket 4, support 5, force signal line 6, recorder 7, heating jacket 8, heat-resistant wire 9, test piece 10, heating wire 11, temperature signal line 12, temperature control box 13 and windproof box 14, wherein:

[0052] The water cooler 1 is connected with the cooling jacket 4 through the water pipe 2, and the mass sensor 3 is installed inside the cooling jacket 4, which cools the mass sensor 3 through water circulation;

[0053] The test piece 10 is hung by the heat-resistant wire 9 below the mass sensor 3, the upper end surface of the mass sensor 3 is a fixed surface, and the lower end surface of the mass sensor 3 is a force surface; the mass sensor selects a weighing sensor, with a measurement upper limit of 100g and a measurement accuracy of 0.01g;

[0054] The cooling jacket 4 is a cylindrical hollow jacket, the upper end surface and the lower part of which are separable; the upper end surface and the lower part of the cooling jacket 4 can be connected with the water cooler 1; the upper end surface of the cooling jacket 4 is fastened to the bottom of the horizontal disc of the support 5, and the mass sensor 3 is installed on the lower bottom surface of the upper end surface of the cooling jacket 4;

[0055] The support 5 has three adjustable height legs, and the top is a horizontal disc; a universal level is installed on the top of the horizontal disc; the horizontal disc is adjusted to be horizontal by adjusting the legs of the support 5; the cooling jacket 4 is installed on the bottom of the horizontal disc, and the mass sensor 3 is installed inside the cooling jacket 4;

[0056] The recorder 7 is connected with the mass sensor 3 through the force signal line 6, and can continuously record the mass change data of the test piece 10 measured by the mass sensor 3;

[0057] The heating jacket 8 is a hollow cylindrical electric heating device with a cover, with an inner diameter of 150mm, an outer diameter of 200mm, and a height of 300mm; the heating jacket 8 is connected with the temperature control box 13 through the heating wire 11; the upper end cover of the heating jacket 8 has a central through hole and an eccentric through hole; the heat-resistant wire 9 passes through the central through hole of the upper end cover of the heating jacket 8 and is connected with the test piece 10; the temperature signal line 12 passes through the eccentric through hole of the upper end cover of the heating jacket 8; and the test piece 10 is filled in the center of the heating jacket 8 from bottom to top by filling coarse ceramic shell first and then filling fine ceramic shell.

[0058] In this embodiment, the coarse-grained ceramic shell has a size of 10 mm in outer diameter, 7 mm in inner diameter, and 10 mm in length, and the fine-grained ceramic shell has a size of 5 mm in outer diameter, 3 mm in inner diameter, and 5 mm in length.

[0059] The test piece 10 is composed of an outer container 10-1 and an inner container 10-2 in a nested structure. The outer container 10-1 is a heat-resistant beaker without a lid, with an outer diameter of 50 mm, an inner diameter of 48 mm, and a height of 50 mm. The inner container 10-2 is a thin-walled aluminum cup, with an outer diameter of 25 mm, an inner diameter of 24 mm, and a height of 50 mm. The inner container 10-2 is suspended on the mass sensor 3 by a heat-resistant wire 9, with a weight of 0.2 g. The inner container 10-2 is not in contact with the outer container 10-1. A temperature signal line 12 is installed on the inner wall of the outer container 10-1. The test sample is placed in the inner container 10-2.

[0060] One end of the temperature signal line 12 is connected to a temperature control box 13, and the other end is a temperature sensor. The temperature sensor is installed on the inner wall of the outer container 10-1 of the test piece 10.

[0061] The temperature control box 13 can set the heating rate, peak temperature, and constant temperature time. The temperature control box 13 continuously measures the temperature in the test piece 10 through the temperature signal line 12. The temperature control box 13 adjusts the heating power of the heating jacket 8 through the heating wire 11 to control the test piece 10 to reach the set temperature.

[0062] The windproof box 14 is an explosion-proof test room. The internal wind speed during the test does not exceed 0.2 m / s. The test temperature is room temperature to 500℃, and the constant temperature time for heat resistance test is 0h to 168h. The ratio of the mass of the test sample to the sum of the masses of the heat-resistant wire 9 and the inner container 10-2 is not less than 1.

[0063] Example 2:

[0064] This example gives a test conducted according to the heat resistance test process and online measurement device of Example 1. The test sample is FOX-7-based aluminum-containing explosive. The initial weight of the test sample is 10 g, the weight of the heat-resistant wire 9 is 0.2 g, and the weight of the inner container 10-2 is 5 g.

[0065] Different from Example 1, the windproof box 13 adopts a plate-type closed structure, and the ratio of the mass of the test sample to the sum of the masses of the heat-resistant wire 9 and the inner container 10-2 is 1.92. The heating rate of the heating jacket 8 is 1℃ / min, the peak temperature is 500℃, and the constant temperature time is 0h.

[0066] Figure 3 is the temperature curve measured in the test. The test sample undergoes thermal explosion at 177℃. Figure 4 is the mass percentage change curve measured. The mass loss rate of the test sample before thermal explosion is only 0.04%, and then explosion occurs.

[0067] Example 3

[0068] This example shows a test carried out according to the procedure of Example 1 using the on-line measuring device for the quality change during the heat resistance test. The test sample was the single-base heat-resistant explosive TNBP, the initial weight of the test sample was 5.2 g, the weight of the heat-resistant wire 9 was 0.2 g, and the weight of the inner container 10-2 was 5 g. The ratio of the weight of the test sample to the sum of the weights of the heat-resistant wire 9 and the inner container 10-2 was 1. The heating rate of the heating jacket 8 was 1 °C / min, the peak temperature was 200 °C, and the constant temperature time was 24 h.

[0069] Figure 5 is the temperature curve measured during the test, Figure 6 is the mass percentage change curve measured during the test, the mass of the test sample first decreases and then increases, the mass loss at the minimum is 0.09%, and the mass loss at the final state is 0.03%.

Claims

1. An online measurement device for mass change during a heat resistance test, characterized in that, The components include a chiller (1), water pipes (2), a mass sensor (3), a cooling jacket (4), a bracket (5), a force measurement signal line (6), a recorder (7), a heating jacket (8), a heat-resistant wire (9), a specimen (10), a heating wire (11), a temperature signal line (12), a temperature control box (13), and a windproof box (14), wherein: The chiller (1) is connected to the cooling jacket (4) through the water pipe (2). The mass sensor (3) is installed inside the cooling jacket (4). The mass sensor (3) is cooled by water circulation. The mass sensor (3) is suspended from the specimen (10) by a heat-resistant wire (9) at the bottom. The upper surface of the mass sensor (3) is a fixed surface, and the lower surface of the mass sensor (3) is a force-bearing surface. The cooling jacket (4) is a cylindrical hollow jacket. The upper end face and the lower part of the jacket can be separated. The upper end face and the lower part of the cooling jacket (4) are both connected to the chiller (1). The upper end face of the cooling jacket (4) is fastened to the bottom of the horizontal disc of the bracket (5). The mass sensor (3) is located on the bottom surface of the upper end face of the cooling jacket (4). The bracket (5) has three height-adjustable legs, and the top is a horizontal disc. A universal level is installed on the top of the horizontal disc. The horizontal disc is adjusted to be level by adjusting the legs of the bracket (5). A cooling jacket (4) is installed at the bottom of the horizontal disc. The recorder (7) is connected to the mass sensor (3) via the force signal line (6) and is used to continuously record the mass change data of the specimen (10) measured by the mass sensor (3); The heating jacket (8) is a hollow cylindrical electric heating device with a cover. It is connected to the temperature control box (13) through the heating wire (11). The upper cover of the heating jacket (8) has a central through hole and an eccentric through hole. The heat-resistant wire (9) passes through the central through hole of the upper cover of the heating jacket (8) and is connected to the specimen (10). The temperature signal wire (12) passes through the eccentric through hole of the upper cover of the heating jacket (8). Inside the heating jacket (8), coarse-grained ceramic shells are filled from bottom to top, and then fine-grained ceramic shells are filled to fill the specimen (10) to the center of the heating jacket (8). The test specimen (10) consists of an outer container (10-1) and an inner container (10-2) forming an inner and outer nested structure. The outer container (10-1) is an open-top heat-resistant beaker, and the inner container (10-2) is a slender heat-conducting cup. The inner container (10-2) is suspended on the mass sensor (3) by a heat-resistant wire (9). There is no contact between the inner container (10-2) and the outer container (10-1). A temperature signal line (12) is installed on the inner wall of the outer container (10-1), and the test sample is placed inside the inner container (10-2). One end of the temperature signal line (12) is connected to the temperature control box (13), and the other end is a temperature sensor. The temperature sensor is installed on the inner wall of the outer container (10-1) of the specimen (10). The temperature control box (13) can be set with heating rate, peak temperature and constant temperature time. The temperature control box (13) continuously measures the temperature inside the specimen (10) through the temperature signal line (12). The temperature control box (13) adjusts the heating power of the heating jacket (8) through the heating line (11) to control the specimen (10) to reach the set temperature. The windproof box (14) is a plate-type enclosed structure or an explosion-proof test chamber. The internal wind speed during the test shall not exceed 0.2 m / s. The test temperature is: room temperature to 500℃, and the heat resistance test constant temperature time is 0h to 168h. During the test, the ratio of the mass of the test sample to the sum of the mass of the heat-resistant wire (9) and the inner container (10-2) shall not be less than 1.

2. The online measurement device for mass change during heat resistance testing as described in claim 1, characterized in that, The mass sensor (3) is a weighing sensor.

3. The online measurement device for mass change during heat resistance testing as described in claim 1, characterized in that, The coarse-grained ceramic shell has an outer diameter of 10 mm, an inner diameter of 7 mm, and a length of 10 mm; the fine-grained ceramic shell has an outer diameter of 5 mm, an inner diameter of 3 mm, and a length of 5 mm.

4. The online measurement device for mass change during heat resistance testing as described in claim 1, characterized in that, The outer container (10-1) has an outer diameter of 50 mm, an inner diameter of 48 mm, and a height of 50 mm; the inner container (10-2) is a thin-walled aluminum cup with an outer diameter of 25 mm, an inner diameter of 24 mm, and a height of 50 mm.

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