CN213121701U - Test system for testing combustion risk of magnesium alloy - Google Patents
Test system for testing combustion risk of magnesium alloy Download PDFInfo
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- CN213121701U CN213121701U CN202021672260.0U CN202021672260U CN213121701U CN 213121701 U CN213121701 U CN 213121701U CN 202021672260 U CN202021672260 U CN 202021672260U CN 213121701 U CN213121701 U CN 213121701U
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Abstract
The utility model relates to a test system for testing magnesium alloy burning risk compares with prior art and has solved the defect that does not have simultaneously and test magnesium alloy burning risk device under air current erodees and the flame heating environment. The test system comprises a flame combustion device, an image acquisition device, an airflow adjusting device, a data acquisition device and a test bin; the flame combustion device takes combustible gas as fuel, and a heat flow density meter arranged at the nozzle port of the burner can detect the heat flow density of flame; the image acquisition of the whole combustion behavior process is realized through a high-speed camera; providing an air flow of a simulated environment through an air flow regulating device; the data acquisition device can complete real-time measurement of the temperature and the quality of the sample. The utility model discloses can simulate the overall process that the burning of magnesium alloy takes place, expands and extinguishes under the true operating mode, realize the quick aassessment to magnesium alloy and area coating sample piece burning risk, help revealing magnesium alloy burning action and formulate the fire prevention measure.
Description
Technical Field
The utility model relates to a magnesium alloy application technical field is a test system for testing magnesium alloy burning risk particularly.
Background
The magnesium alloy has the advantages of small density, high specific strength and specific stiffness, good electromagnetic shielding performance and the like, has wide application prospects in the fields of aerospace, rail transit, automobiles and the like, and particularly can greatly reduce the weight of an aircraft, improve the maneuvering performance and reduce the oil consumption of parts made of the magnesium alloy in the aircraft.
However, due to the characteristics of strong affinity of magnesium with oxygen, high oxidation heat and combustion heat, the fire extinguishing agent has a risk of firing and burning under special conditions such as high-temperature gas scouring or existence in the form of magnesium chips, and once the magnesium alloy burns, even if a heat source is removed, the fire of the magnesium alloy is still difficult to extinguish by itself.
At present, an electric furnace or a resistance furnace is generally adopted as an experimental device for testing the combustion risk of the magnesium alloy, and the combustion risk is measured by heating in the furnace, observing and recording the surface appearance and the temperature change condition of a magnesium alloy sample by naked eyes. However, the measurement efficiency and repeatability of the device are very low, and the practicability is not strong, and more importantly, the experimental environmental conditions of the device are different from the environmental conditions of combustion in the practical application of the magnesium alloy, so that the safety and effectiveness of the application of the magnesium alloy are difficult to ensure.
Disclosure of Invention
The utility model aims at solving prior art's not enough and providing a test system who tests magnesium alloy burning risk under external air current and flame heating environment, test system can gather the analysis to the combustion products of magnesium alloy to and test data such as the temperature and the quality of magnesium alloy in the combustion process, improved the accuracy of material burning risk test, provide the data foundation for studying magnesium alloy burning behavior.
In order to achieve the above purpose, the technical solution of the present invention is as follows: a test system for testing the combustion risk of magnesium alloy comprises a flame combustion device, an image acquisition device, an airflow adjusting device, a data acquisition device and a test bin; an observation window is arranged at the front end of the test bin and is matched with the high-speed camera together for observing the whole process of the combustion behavior of the sample and acquiring images; the test chamber consists of an outer wall made of stainless steel and an inner wall made of heat insulation cotton and bauxite refractory material; the sample to be tested is fixed by a sample clamp and is placed on a lifting platform in the test bin; and an air inlet and an air outlet are respectively arranged at two sides of the test bin.
Wherein:
the flame combustion device comprises a combustion controller, a sliding rail, a burner nozzle and a heat flow densimeter; the combustion controller can move up and down along the sliding guide rail and is used for adjusting the distance between the burner nozzle and the surface of the sample to be tested; the knob on the combustion controller is used for adjusting the flame size; the fuel adopted by the flame combustion device comprises liquefied petroleum gas, propane, butane, oxygen-acetylene mixed gas and the like, and the heating capacity can reach 800-2000 ℃; the burner nozzle port is provided with a heat flow densimeter for measuring the heat flow density of the heating flame, and the measuring range can reach 1000-4200 kW/m2；
The gas flow adjusting device comprises a gas inlet pipeline provided with a gas inlet valve, the gas inlet valve is adjusted to enable the surrounding of a sample to realize a flow velocity environment of 0-10 m/s, and inert gas can be introduced from the gas inlet to extinguish a burning sample; and the gas flow velocity tester arranged on the exhaust port pipeline is used for monitoring the gas flow velocity.
The data acquisition device comprises a temperature acquisition device consisting of a temperature data recorder and a thermocouple connected with a tested sample, and a weighing sensor is arranged in the base and can respectively complete the measurement and the recording of the temperature and the mass of the sample.
The thickness of the sample is less than or equal to 30mm, the transverse dimension is less than or equal to 150mm, and the shape of the sample comprises a sheet shape, a block shape, a rod shape and a similar service part shape.
The sample clamp is made of a heat-insulating fireproof material, a groove is formed in the surface of the sample clamp, the sample is arranged in the groove, fireproof cotton is filled between the sample and the clamp and clamped and fixed by bolts, the clamp chassis and the lifting platform are fixed by cylindrical pins, a through hole is formed in the surface of the clamp, and a thermocouple can be inserted into the through hole and connected with a temperature data recorder to measure the temperature of the sample.
The technical scheme of the utility model beneficial effect as follows:
the test method is convenient to operate, quick in test and high in safety, can quantitatively test the ignition temperature, the ignition time and the quality change condition of the sample under the flame heating condition, can collect the burned sample, and can change the air flow rate around the sample in the test process so as to reflect the combustion risk of the magnesium alloy in different environments and provide a basis for material selection and design.
Drawings
FIG. 1 is a schematic structural diagram of a magnesium alloy combustion risk test system according to the present invention.
FIG. 2 is a schematic structural diagram of a sample clamp in the magnesium alloy combustion risk test system of the present invention.
In the figure:
1-a combustion controller; 2-a sliding guide rail; 3-an observation window; 4-an image acquisition device; 5, testing a bin; 6-an air inlet valve; 7-an air inlet; 8-a thermocouple; 9-temperature data recorder; 10-a load cell; 11-a base; 12-a lifting platform; 13-gas flow rate tester; 14-an air outlet; 15-a sample holder; 15-1-body; 15-2-sample fixation groove; 15-3-a fire-resistant layer; 15-4-thermocouple mounting holes; 15-5-fixed pins; 15-6-fastening nuts; 16-a sample; 17-heat flow densitometer; 18-a burner nozzle; 19-an exhaust pipe; 20-an air inlet pipe; 21-connecting pipe; 22-a thermally insulating layer; 23-a cabin body; 24-sliding block.
Detailed Description
To further clarify the structure and advantages of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which:
as shown in fig. 1, the utility model relates to a test system for testing magnesium alloy burning risk, which is characterized in that, the test system comprises a flame burning device, an image acquisition device 4, an air flow adjusting device, a data acquisition device and a test chamber 5;
the test bin is provided with an observation window, and the image acquisition device is arranged outside the test bin and is positioned at the front end of the observation window;
the flame combustion device is arranged at the top of the interior of the test chamber,
the air flow adjusting devices are arranged at two sides of the test bin and are communicated with the interior of the test bin,
the data acquisition device is arranged outside the test bin and is connected with the interior of the test bin through a data line.
The test chamber 5 comprises a base 11, a chamber body 23, a heat insulation layer 1, an air inlet 7 and an air outlet 14;
the bin body 23 is arranged on the base 11, the thermal insulation layer 22 is arranged on the inner wall of the bin body 23, the air inlet 7 and the air outlet 14 are respectively arranged on the side wall of the bin body 23, and the observation window 3 is arranged on the side wall of the bin body 23.
The flame combustion device comprises a combustion controller 1, a sliding rail 2, a burner nozzle 18 and a heat flow densitometer 17;
the sliding rail 2 is arranged at the top end of the outer part of the bin body 23, a sliding block 24 is arranged on the sliding rail 2, the combustion controller 1 is arranged on the sliding block 24, the combustion controller 1 is connected with the burner nozzle 18 arranged in the bin body 23 through a connecting pipe 21, the heat flow density meter 17 is arranged on the burner nozzle 18, and the combustion controller 24 can drive the burner nozzle 18 to slide up and down in the bin body 23.
The data acquisition device comprises a temperature data recorder 9, a thermocouple 8, a lifting table 12, a weighing sensor 10 and a sample clamp 15;
wherein, the weighing sensor 10 is arranged at the central position of the base 11 positioned in the bin body 23, the lifting platform 12 is arranged on the weighing sensor 10, the sample clamp 15 is arranged at the top of the lifting platform 12, the thermocouple 8 is arranged in the sample clamp 15, and the thermocouple 8 is connected with the temperature data recorder 9 arranged outside the bin body 23.
The air flow adjusting device comprises an air inlet pipe 20, an air inlet valve 6, an air outlet pipe 19 and a gas flow velocity tester 13;
wherein, the intake pipe 20 with the air inlet 7 is connected, just be equipped with admission valve 6 on the intake pipe 20, blast pipe 19 with the gas vent 14 is connected, gas velocity of flow tester 13 sets up on the blast pipe 7.
The bin body 22 is made of stainless steel, and the heat insulation layer 23 comprises heat insulation cotton and bauxite refractory materials.
The image acquisition device 5 is a high-speed camera.
The sample clamp 15 comprises a main body 15-1, a sample fixing groove 15-2, a fireproof layer 15-3, a thermocouple mounting hole 15-4, a fixing pin 15-5 and a fastening nut 15-6;
the thermocouple 8 mounting hole is formed in the main body 15-4, the sample fixing groove 15-2 is formed in one end of the main body 15-1, the fireproof layer 15-3 is formed in the inner surface of the sample fixing groove 15-2, the thermocouple mounting hole 15-4 penetrates through the sample fixing groove 15-2 and the fireproof layer 15-3, a fastening nut 15-6 is arranged on the sample fixing groove 15-2, and the fixing pin 15-5 is formed in the other end of the main body and used for fixedly connecting the lifting table 12.
The fireproof layer is made of fireproof cotton, and the main body 15-1 is made of a heat-insulating fireproof material.
The heating capacity of the flame combustion device 1 can reach 800-2000 ℃; the 17-range measurement of the heat flow densimeter is 1000-4200 kW/m2。
The utility model discloses a theory of operation is: firstly, test parameters are established, a test material is processed into a square test sample 16 with the side length of 25mm, the ambient air flow is set to be 2m/s, the flame temperature is set to be 1300 ℃, and the flame heat flux density is set to be 3500kW/m2(ii) a Opening the observation window 3 and mounting the sample clamp 15 to the test chamberIn the chamber 5, the distance between the specimen holder 15 and the burner nozzle 18 was adjusted to 10cm by the elevating table 12 and the slide rail 2, and one end of the thermocouple 8 was inserted into the center of the specimen holder 15 and the other end was connected to the temperature data recorder 9. Calibrating the equipment, starting the combustion controller 1 to adjust the flame size, detecting the readings of the heat flow densimeter 17 and the temperature of the thermocouple 8 on the sample clamp 15 after 2min, and adjusting the flow of the combustor to reach the set temperature of 1300 ℃ and the set heat flow density of 3500kW/m2And the burner is turned off. The sample is mounted, the observation window 3 is opened, the sample with the thermocouple 8 inserted at the bottom end is mounted on the sample holder 15 and is set to the calibrated position, the sample 16 is mounted, and the weight of the sample 16 is recorded by the load cell 10. The air inlet flow is adjusted by the air inlet valve 6, so that the gas flow velocity tester 17 reaches the set parameter of 2 m/s. The combustion controller 1 is started to maintain the flow rate of the burner at a predetermined value. The whole combustion process is recorded by the high-speed camera 4, the temperature change of the sample is recorded by the temperature data instrument 9, the mass change of the sample is recorded by the weighing sensor 10, the test is repeated for many times, and the average value of the ignition temperature, the time required by ignition and the combustion time is obtained. When the sample begins to burn, the burner is immediately closed, and when the combustion is completed, the observation window is opened, and the combustion products and the unburnt sample are taken out.
The test system for testing the combustion risk of the magnesium alloy provided by the embodiment of the application is described in detail above. The above description of the embodiments is only for the purpose of helping to understand the method of the present application and its core ideas; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
As used in this specification and the appended claims, certain terms are used to refer to particular components, and various names may be used by a manufacturer of hardware to refer to a same component. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The foregoing description shows and describes several preferred embodiments of the present application, but as aforementioned, it is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the application as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.
Claims (10)
1. A test system for testing the combustion risk of magnesium alloy is characterized by comprising a flame combustion device, an image acquisition device, an airflow adjusting device, a data acquisition device and a test bin;
the test bin is provided with an observation window, and the image acquisition device is arranged outside the test bin and is positioned at the front end of the observation window;
the flame combustion device is arranged at the top of the interior of the test bin;
the air flow adjusting devices are arranged on two sides of the test bin and are communicated with the interior of the test bin;
the data acquisition device is arranged outside the test bin and is connected with the interior of the test bin through a data line.
2. The testing system of claim 1, wherein the test chamber comprises a base, a chamber body, a thermal insulation layer, an air inlet, and an air outlet;
the bin body is arranged on the base, the thermal insulation layer is arranged on the inner wall of the bin body, the air inlet and the air outlet are respectively arranged on the side wall of the bin body, and the observation window is arranged on the side wall of the bin body.
3. The testing system of claim 2, wherein the flame burning device comprises a combustion controller, a sliding rail, a burner nozzle, and a heat flow densitometer;
wherein, the slip track sets up the top of the outside of test bin, be equipped with the slider on the slip track, the setting of combustion controller is in on the slider, the combustion controller passes through the connecting pipe and sets up the storehouse is internal the combustor nozzle is connected, the heat-flow densimeter sets up on the combustor nozzle, the combustion controller can drive the combustor nozzle is in the internal slip from top to bottom of storehouse.
4. The testing system of claim 3, wherein said data acquisition device comprises a temperature data recorder, a thermocouple, a lift table, a load cell, and a sample holder;
the test bin comprises a base, a weighing sensor, a lifting table, a sample clamp, a thermocouple and a temperature data recorder, wherein the weighing sensor is arranged at the central position of the base in the bin body, the lifting table is arranged on the weighing sensor, the sample clamp is arranged at the top of the lifting table, the thermocouple is arranged in the clamp, and the thermocouple is connected with the temperature data recorder arranged outside the test bin.
5. The testing system of claim 4, wherein the gas flow regulating device comprises an inlet manifold, an inlet valve, an outlet manifold, and a gas flow rate tester;
the gas inlet pipe is connected with the gas inlet, the gas inlet pipe is provided with a gas inlet valve, the exhaust pipe is connected with the gas outlet, and the gas flow rate tester is arranged on the exhaust pipe.
6. The testing system of claim 5, wherein the cartridge body is made of a stainless steel material and the thermal insulation layer comprises a thermal insulation cotton and a bauxite refractory material.
7. The testing system of claim 6, wherein the image capture device is a high-speed camera.
8. The testing system of claim 4, wherein the sample holder comprises a body, a sample holding groove, a flame retardant layer, a thermocouple mounting hole, and a holding pin;
wherein, the thermocouple mounting hole sets up inside the main part, the sample fixed slot sets up main part one end, the flame retardant coating sets up in the fixed slot, the thermocouple mounting hole runs through sample fixed slot and flame retardant coating, the fixed pin sets up the other end of main part for the elevating platform rigid coupling.
9. The testing system of claim 8, wherein the fire-resistant layer is made of fire-resistant cotton, and the main body is made of a heat-insulating fire-resistant material.
10. The test system according to claim 3, wherein the heating capacity of the flame combustion device can reach 800-2000 ℃; the measuring range of the heat flow densimeter is 1000-4200 kW/m2。
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021672260.0U CN213121701U (en) | 2020-08-12 | 2020-08-12 | Test system for testing combustion risk of magnesium alloy |
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| CN202021672260.0U CN213121701U (en) | 2020-08-12 | 2020-08-12 | Test system for testing combustion risk of magnesium alloy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740481A (en) * | 2021-09-24 | 2021-12-03 | 山东省产品质量检验研究院 | Automatic testing device for flame retardant property of protective boots for firemen and using method |
| CN114324731A (en) * | 2021-11-24 | 2022-04-12 | 中国船舶重工集团公司第七一一研究所 | Experimental device and experimental method for testing coking and carbon deposition of lubricating oil |
-
2020
- 2020-08-12 CN CN202021672260.0U patent/CN213121701U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740481A (en) * | 2021-09-24 | 2021-12-03 | 山东省产品质量检验研究院 | Automatic testing device for flame retardant property of protective boots for firemen and using method |
| CN114324731A (en) * | 2021-11-24 | 2022-04-12 | 中国船舶重工集团公司第七一一研究所 | Experimental device and experimental method for testing coking and carbon deposition of lubricating oil |
| CN114324731B (en) * | 2021-11-24 | 2024-05-24 | 中国船舶集团有限公司第七一一研究所 | Experimental device for testing coking and carbon deposition of lubricating oil and experimental method thereof |
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