CN205049502U - Test device is stored to chemicals isothermal - Google Patents
Test device is stored to chemicals isothermal Download PDFInfo
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- CN205049502U CN205049502U CN201520790218.1U CN201520790218U CN205049502U CN 205049502 U CN205049502 U CN 205049502U CN 201520790218 U CN201520790218 U CN 201520790218U CN 205049502 U CN205049502 U CN 205049502U
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Abstract
The utility model relates to a test device is stored to chemicals isothermal mainly solves the problem of still not having test device is stored to chemicals isothermal among the prior art. The utility model discloses an adopt a test device is stored to chemicals isothermal, the circumstances of the voltage difference variation with time that causes to the thermal current of aluminium pig and inert substance container to the difference between the thermal current of aluminium pig with computer continuous recording sample container, computer terminal has solved above -mentioned problem according to the technical scheme that the biggest heat generation rate of unit weight and the test temperature of multiple metering calculated autoacceleration decomposition temperature betterly, can be used to in the storage test of chemicals isothermal.
Description
Technical field
The utility model relates to a kind of chemicals isothermal storage test device.
Background technology
Along with chemicals relevant policies, regulation, standard are gradually improved, the danger of chemicals in transportation is detected and it is also proposed strict demand.Chemicals SADT judges whether chemicals has the important parameter of autoreaction danger, decompose for assessment of the autoacceleration of chemicals in parcel post transportation whether causing danger property, chemicals isothermal storage test device is used for determining reaction or decomposed substance time-varying heat generation rate at a constant temperature, and the heat generation parameter obtained determines the SADT of material in its container with about the thermal loss data one of parcel post are used from.
At present, according to the situation of literature search and market survey, the domestic mechanism that there is no designed similar proving installation according to the isothermal storage test of requirement to chemicals of the United Nations's " recommendation-test and manual of standards about Dangerous Goods Transport " at present, the chemicals isothermal storage test device of also not similar with the utility model commodity.
Utility model content
Technical problem to be solved in the utility model is the problem that there is no chemicals isothermal storage test device in prior art, provides a kind of new chemicals isothermal storage test device.The method is used in the storage test of chemicals isothermal, this test unit is firm in structure, sample quantities is fewer and operating conditions is clear and definite, can carry out in routine experimentation indoor, and this test unit can calculate SADT automatically, without the need to artificial calculating.
For solving the problem, the technical solution adopted in the utility model is as follows: a kind of chemicals isothermal storage test device, comprise platinum-resistance thermometer, sample receiver, platinum sensor, heat flow meter, aluminium block, circuit, heated wire, amplifier, temperature controller, computer, glass wool, it is characterized in that heat sink aluminium block skin is for heated wire, fills with shell of tank centre glass wool; Establish two cylinder supports in aluminium block, place two sample receivers, platinum-resistance thermometer is connected with aluminium block, drill two holes on aluminium block, bohr is housed and pastes element; There is space D between cylinder support and sample receiver, between heat sink aluminium block and heated wire, be provided with space M; Heated wire skin is connected with the platinum sensor for security control with the platinum sensor of control temperature; Circuit on one side is connected with sample receiver, and the other end is connected with amplifier, and amplifier is connected with computer terminal; The platinum sensor of control temperature is connected with temperature controller.
In the utility model, comprise an air-insulated heat sink (aluminium block (K)), make it keep constant temperature by the method controlling heating.Temperature controller (Q) can make the temperature of aluminium block remain in setting temperature ± 0.2 DEG C.The temperature of heat sink aluminium block (K) is measured with platinum resistor temperature measuring meter (A).Drill two holes on aluminium block, for filling heat flow meter, such as Peltier element (J).For the material of SADT lower than environment temperature, test and carry out in cooling chamber, or use solid carbon dioxide cool furnace.
All placing container (B) on two heat flow meters: dress sample (E), dress inert substance (F).Two containers are identical, and volume is 70 cubic centimetres.The amount of material that each container fills is about 20 grams.Container glass or stainless steel are made.Stainless steel must be compatible with substances, if should use glass container when occurring incompatible.When using glass container, a long kapillary should be equipped with in case the pressure in container raises and sample evaporation.
Sample receiver to the hot-fluid of heat sink and inert substance container to the hot-fluid of heat sink between the voltage difference computer that causes of difference record its time dependent situation (difference is measured) continuously.Computer terminal calculates SADT according to the maximum heat generation rate of the unit weight of repetitive measurement and test temperature.
This test unit is measured and can be carried out in the temperature range of-20 DEG C to 200 DEG C.The heating numerical value that can measure is 5 milliwatts/kilogram to 5 watts/kilogram.0.1 watt/DEG C is about through the thermal resistance of heat flow meter between sample receiver and aluminium block.The heat generation rate that equipment can be measured be 15 milliwatts/kilogram to 1500 milliwatts/kilogram, maximum error 15 milliwatts/kilogram time be 30%, 100 to 1500 milliwatts/kilogram time be 5%.
The utility model provides a kind of chemicals isothermal storage test device, and this test unit is used for determining reaction or decomposed substance time-varying heat generation rate at a constant temperature.The heat generation parameter obtained determines the SADT of material in its container with about the thermal loss data one of parcel post are used from.Principle of the present utility model is the stainless steel or the glass container that test substance and reference (inertia) material are placed in respectively volume 70 cubic centimetres, using aluminium block as heat sink, with computer or register record continuously sample receiver to the hot-fluid of heat sink and inert substance container to the hot-fluid of heat sink between its time dependent situation of voltage difference (difference is measured) of causing of difference, and calculate SADT according to the maximum heat generation rate of the unit weight of repetitive measurement and test temperature, achieve good technique effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of device described in the utility model.
(A) platinum-resistance thermometer (B) sample receiver
(C) cylinder support (D) space
(E) sample (F) inert substance
(G) for the platinum sensor (H) of control temperature for the platinum sensor of security control
(J) bohr pastes element (K) aluminium block
(L) circuit (M) space
(N) heated wire (O) amplifier
(P) computer terminal (Q) temperature controller
(R) glass wool
Heat sink aluminium block (K), skin is heated wire (N), fills with the middle glass wool of shell of tank (R); Establish two cylinder supports (C) in aluminium block (K), place two sample receivers (B), respectively splendid attire testing sample (E) and inert reference material (F); Platinum-resistance thermometer (A) is connected with aluminium block (K), drill two holes on aluminium block, bohr is housed and pastes element (J); D is the space between cylinder support (C) and sample receiver (B), and M is the space between heat sink aluminium block (K) and heated wire (N); Heated wire (N) skin is connected with the platinum sensor (H) for security control with the platinum sensor (G) of control temperature; Circuit (L) connects sample receiver (B), by amplifier (O) to computer terminal (P); The platinum sensor (G) of control temperature is connected with temperature controller (Q).
Below by embodiment, the utility model is further elaborated, but is not limited only to the present embodiment.
Embodiment
[embodiment 1]
Adopt device as shown in Figure 1, carry out the storage test of chemicals isothermal.Described device
Make aluminium block keep constant temperature by the method controlling heating, temperature controller can make the temperature of aluminium block remain in setting temperature ± 0.2 DEG C; The temperature platinum resistor temperature measuring measurement amount of aluminium block, drill two holes on aluminium block, for filling heat flow meter, all placing container on two heat flow meters, fill sample and inert substance respectively, two containers are identical, make with glass or stainless steel, stainless steel is compatible with substances, if use glass container when occurring incompatible; With computer record continuously sample receiver to the hot-fluid of aluminium block and inert substance container to the hot-fluid of aluminium block between the time dependent situation of voltage difference that causes of difference, computer terminal calculates SADT according to the maximum heat generation rate of the unit weight of repetitive measurement and test temperature.
For the material of SADT lower than environment temperature, test and carry out in cooling chamber, or use solid carbon dioxide cool furnace.Described hot-fluid counts Peltier element.Described container is identical, and volume is 70 cubic centimetres, and the amount of material that each container fills is 20 grams.When using glass container, be equipped with a capillary in case the pressure in container raises and sample evaporation.Test unit is measured and is carried out in the temperature range of-20 DEG C to 200 DEG C, the heating numerical value measured is 5 milliwatts/kilogram to 5 watts/kilogram, between sample receiver and aluminium block through the thermal resistance of heat flow meter be 0.1 watt/DEG C, the heat generation rate that can measure be 15 milliwatts/kilogram to 1500 milliwatts/kilogram, maximum error 15 milliwatts/kilogram time be 30%, 100 to 1500 milliwatts/kilogram time be 5%.
Concrete step is as follows:
(1) before measurements, the sensitivity determining blank signal and heat flow meter with following calibration procedure is needed:
A isothermal storage test device is set up in optional test temperature by ();
B heater coil is inserted sample receiver by ().In sample receiver and reference container, load inert substance (such as sodium chloride or the beaded glass that grinds), guarantee that heater coil is covered by material completely.Two containers are placed in isothermal storage test device;
C () determines the blank signal output of register (when heater coil does not connect power supply);
D electrical heating power that () uses two or three different is to determine the sensitivity of heat flow meter, and these heating powers should within the scope of the test specimen heat generation rate estimated.
(2) test routine
Test is started after determining the sensitivity of blank signal and heat flow meter:
A isothermal storage test device is adjusted to required test temperature by ();
Load weighed sample in (b) sample receiver and add a certain quantity representing packing container material (if metal), then container is inserted in test unit.It is 5 milliwatt to 1500 milliwatts that sample quantities should enough make heat generation rate reach every kilogram of material;
C () starts to measure heat generation rate.The result of 12 hours on-test should not adopt, because this period of time needs to be used for making temperature reach balance.The duration of each test depends on test temperature and heat generation rate.Test should proceed at least 24 hours after the temperature equilibrium time of 12 hours, then can stop, if heat generation rate starts to decline from maximal value, or heat generation rate is greater than 1.5 watts/kilogram;
The change of sample weight should be determined during (d) off-test;
(e) with new sample repeat at the temperature at 5 DEG C, interval test so that 15 to 1500 milliwatts/kilogram between obtain 7 maximum heat generation rate results.
(3) computer calculates the principle of SADT automatically
1. according to the sensitivity S (milliwatt/millivolt) of following formulae discovery instrument under for the various different electric power of calibration procedure:
In formula: P=electric power (milliwatt)
U
d=glitch (millivolt)
U
b=blank signal (millivolt)
2. these numerical value and test figure is utilized to come according to the maximum heat generation rate Q of following formulae discovery at different tests temperature (milliwatt/kilogram):
In formula: U
s=sample signal (millivolt)
M=weight (kilogram)
3. the function of maximum for the unit weight calculated heat generation rate as test temperature is marked on linear calibration figure, and by strokes and dots optimum fit curve that these mark.Determine the unit weight thermal loss L (watt/kilogram DEG C) of specific parcel post, medium-sized bulk cargo box or tank body.Drawing a, slope tangent with heating curve is the straight line of L.The intersection point of this straight line and horizontal ordinate is exactly critical environmental temperature, and namely in parcel post, material does not show the maximum temperature of autoacceleration decomposition.SADT is then that critical environmental temperature (DEG C) changes the whole temperature to 5 DEG C of next higher multiples.
(4) result citing
Adopt this test unit to test azobisformamide, 30 kilograms of parcel posts (fiber drum splendid attire), unit weight thermal loss is 100 milliwatts/kilogram K, and SADT is greater than 75 DEG C.
Claims (1)
1. a chemicals isothermal storage test device, comprise platinum-resistance thermometer, sample receiver, platinum sensor, heat flow meter, aluminium block, circuit, heated wire, amplifier, temperature controller, computer, glass wool, it is characterized in that heat sink aluminium block skin is for heated wire, fills with shell of tank centre glass wool; Establish two cylinder supports in aluminium block, place two sample receivers, platinum-resistance thermometer is connected with aluminium block, drill two holes on aluminium block, bohr is housed and pastes element; There is space D between cylinder support and sample receiver, between heat sink aluminium block and heated wire, be provided with space M; Heated wire skin is connected with the platinum sensor for security control with the platinum sensor of control temperature; Circuit on one side is connected with sample receiver, and the other end is connected with amplifier, and amplifier is connected with computer terminal; The platinum sensor of control temperature is connected with temperature controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520790218.1U CN205049502U (en) | 2015-10-13 | 2015-10-13 | Test device is stored to chemicals isothermal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520790218.1U CN205049502U (en) | 2015-10-13 | 2015-10-13 | Test device is stored to chemicals isothermal |
Publications (1)
| Publication Number | Publication Date |
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| CN205049502U true CN205049502U (en) | 2016-02-24 |
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| CN201520790218.1U Active CN205049502U (en) | 2015-10-13 | 2015-10-13 | Test device is stored to chemicals isothermal |
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| CN (1) | CN205049502U (en) |
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2015
- 2015-10-13 CN CN201520790218.1U patent/CN205049502U/en active Active
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