CN210294196U - Asphalt flame retardant property testing device - Google Patents
Asphalt flame retardant property testing device Download PDFInfo
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- CN210294196U CN210294196U CN201921045693.0U CN201921045693U CN210294196U CN 210294196 U CN210294196 U CN 210294196U CN 201921045693 U CN201921045693 U CN 201921045693U CN 210294196 U CN210294196 U CN 210294196U
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- combustion
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- hanging cover
- flame retardant
- asphalt
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Abstract
The utility model discloses a device for testing the flame retardant property of asphalt, which comprises a combustion chamber, wherein the combustion chamber is a sealed structure, an electronic scale with timing and weighing functions is placed inside the combustion chamber, a combustion vessel is placed on the electronic scale, a hanging cover is fixedly connected with the top inside the combustion chamber, and the hanging cover is hung above the combustion vessel; the flame retardant property of the asphalt is tested in a simpler and more intuitive mode, the combustion state of the asphalt on site is simulated by utilizing the closed combustion chamber, the electronic scale can directly record the combustion time and the mass change of the test piece before and after combustion, the temperature sensor probe is arranged in the conical hanging cover, the top of the hanging cover is connected with the temperature display instrument and the tail gas detection device, all detection data are obtained quickly, the operation is simple, and a plurality of indexes can be measured at one time; this application combustion chamber and each device are arranged rationally, have both guaranteed the gas tightness of combustion chamber, have avoided loaded down with trivial details operation, convenient to use simultaneously.
Description
Technical Field
The utility model relates to a testing arrangement, concretely relates to pitch fire behaviour testing arrangement.
Background
Compared with cement pavements, asphalt pavements have the advantages of good flatness, good driving comfort, low driving noise, excellent anti-skid property, easy maintenance after damage and the like, so that the asphalt pavements are increasingly adopted by tunnel pavements.
Because the internal environment of the tunnel is relatively closed and the ventilation performance is poor, the asphalt can bring serious harm to the life and property safety of people once a fire disaster happens in the tunnel in the operation process, and therefore, the research on the flame retardant property of the asphalt, particularly the novel flame retardant asphalt is necessary.
Bitumen burns differently than liquid fuels, and also differently than solid fuels. The specific expression is that the temperature of a single drop can generate obvious leap at the moment of ignition, the combustion stage of obvious solid carbon residue exists, the volume of the single drop can obviously expand, and the like. The indexes for evaluating the combustion performance of the asphalt at present mainly comprise flash point and ignition point, which can effectively evaluate the safety of the asphalt in the storage and construction processes, but only describe the conditions under which the asphalt can be combusted, but cannot explain the capability of the asphalt to continuously combust under the condition that the asphalt is ignited and combusted. For testing the flame retardant property of the asphalt binder, the test means for evaluating the flame retardant property of plastics are mostly referred at home and abroad.
The traditional method for testing the flame retardant property of the asphalt mainly adopts a limit oxygen index method, wherein the oxygen index refers to the minimum oxygen concentration required for maintaining balanced combustion of a sample in an oxygen-nitrogen mixed gas flow under specified conditions, is expressed by volume percentage of oxygen and is expressed as OI (oxygen index), is used as a judgment material for the difficulty of combustion when the sample is in contact with flame in air, and is also called as a limit oxygen index in part of documents and is expressed as LOI (Limit oxygen index). By definition of oxygen index, a higher oxygen index indicates a higher oxygen concentration required for combustion, and the more difficult the sample burns. It is generally believed that when the LOI is less than 2 l%, it is a flammable material, when the LOI is between 21% and 27%, it is a flammable material, and when the LOI is greater than 27%, the material self-extinguishes during combustion. The oxygen index can be determined according to GB 2406-1993. The oxygen index experiment is a test method which is widely applied to the aspect of testing the flame retardant property of the flame retardant asphalt at present. The process is as follows: the test specimen is vertically supported in a transparent combustion cylinder in which a mixture gas of oxygen and nitrogen flows upward, the upper end of the test specimen is ignited, and then the combustion phenomenon is observed and the combustion duration is compared with a prescribed limit value. The lowest oxygen concentration can be determined by testing in different oxygen concentrations. Because the property of the asphalt is greatly different from that of common textiles, a test method must be adjusted according to the inherent characteristics (combustion performance) of the asphalt, and main factors influencing the continuous combustion capacity of the asphalt are found out.
Therefore, a testing device which is simple and convenient to operate and can simultaneously test multiple indexes such as asphalt combustion time, quality change, combustion temperature and combustion product concentration is needed.
SUMMERY OF THE UTILITY MODEL
To the problem, the utility model aims at providing a simple structure, easily operation, extensive applicability's pitch fire behaviour testing arrangement can test multiple index such as sign pitch flame retardant characteristic includes pitch burning time, quality variation, temperature variation, combustion products concentration.
In order to realize the technical purpose, the utility model discloses a scheme is: the asphalt flame retardant property testing device comprises a combustion chamber, wherein the combustion chamber is of a sealed structure, an electronic scale with timing and weighing functions is placed inside the combustion chamber, a combustion vessel is placed on the electronic scale, a hanging cover is fixedly connected to the top inside the combustion chamber, and the hanging cover is hung above the combustion vessel;
the inner wall of the hanging cover is provided with a temperature sensor probe, and the top of the hanging cover is provided with a vent pipe which extends out of the combustion chamber and is connected with an external tail gas detection device.
Preferably, the hanging cover is of a cone structure with a narrow top and a wide bottom, and the bottom area of the hanging cover completely covers the surface area of the combustion dish.
Preferably, one side of the combustion chamber is a transparent glass door, one side of the transparent glass door, which is at the same height with the combustion vessel, is provided with a circular hole, and the ignition gun can ignite asphalt in the combustion vessel through the circular hole.
Preferably, the top of the hanging cover and the top of the combustion chamber are provided with notches which have the same size and are in orderly butt joint, and the notches are used for enabling the top of the hanging cover to extend out of the vent pipe to be connected with an external tail gas detection device.
Preferably, the temperature sensor probe is a high-precision infrared temperature sensor probe, the temperature sensor probe is connected with a data line, and the data line is connected with an external temperature display instrument through a notch.
Preferably, the hanging cover is fixed on the top of the combustion chamber through screws.
Preferably, the outer side of the shell of the temperature sensor probe is provided with standard threads, and the temperature sensor probe penetrates through the hanging cover and is fixed on the inner wall of the hanging cover through screws.
Preferably, a magnet handle is arranged on one surface of a transparent glass door of the combustion chamber.
The beneficial effects of the utility model are that, this application adopts more simple and convenient, more audio-visual mode test pitch's fire behaviour, utilizes airtight combustion chamber simulation on-the-spot pitch combustion state, and the electronic scale can direct record burning time and test piece mass change before and after burning, is provided with the temperature sensor probe in the conical hanging cover, and the hanging cover top is connected with temperature monitor and tail gas detection device, and all data acquisition are quick, easy operation, and a plurality of indexes can be measured to one time performance; this application combustion chamber and each device are arranged rationally, have both guaranteed the gas tightness of combustion chamber, have avoided loaded down with trivial details operation simultaneously, and convenient to use can test a plurality of signs such as pitch burning time, quality change, temperature variation, combustion products concentration pitch fire-retardant characteristics simultaneously.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. a combustion chamber; 2. an electronic scale; 3. a combustion vessel; 4. hanging a cover; 5. a temperature sensor probe; 6. a breather pipe; 7. a tail gas detection device; 8. a circular hole; 9. a notch; 10. a data line; 11. a temperature display instrument; 12. screws; 13. magnet handle.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the specific embodiment of the present invention is an asphalt flame retardant property testing device, comprising a combustion chamber 1, wherein the combustion chamber 1 is a sealed structure, an electronic scale 2 with timing and weighing functions is placed inside the combustion chamber 1, a combustion vessel 3 is placed on the electronic scale 2, a hanging cover 4 is fixedly connected to the top inside the combustion chamber 1, and the hanging cover 4 is hung above the combustion vessel 3;
the inner wall of the hanging cover 4 is provided with a temperature sensor probe 5, and the top of the hanging cover 4 is provided with a vent pipe 6 which extends out of the combustion chamber 1 and is connected with an external tail gas detection device 7.
In order to record combustion data more intensively, the hanging cover 4 is in a cone structure with a narrow top and a wide bottom, and the bottom area of the hanging cover 4 completely covers the surface area of the combustion dish 3. The top of the hanging cover 4 and the top of the combustion chamber 1 are provided with a notch 9 which has the same size and is in orderly butt joint, and the notch 9 is used for extending the vent pipe from the top of the hanging cover 4 to be connected with an external tail gas detection device 7. The cone hangs directly over the burning ware and covers, can collect burning temperature data on a maximum scale, and the flue gas rises and directly gets into the cone and hangs in the lid, gets into tail gas detection device through the breather pipe, and tail gas detection device carries out the analysis to the concentration composition of burning tail gas.
In order to directly ignite the asphalt, one surface of the combustion chamber 1 is a transparent glass door, one surface of the transparent glass door at the same height with the combustion vessel 3 is provided with a round hole 8, and an ignition gun can ignite the asphalt in the combustion vessel 3 through the round hole 8.
In order to record the data of the temperature sensor probe, the temperature sensor probe 5 is a high-precision infrared temperature sensor probe, the temperature sensor probe 5 is connected with a data line 10, and the data line 10 is connected with an external temperature display instrument 11 through a gap 9.
In order to hold the cover close, the cover 4 is fastened to the top of the combustion chamber 1 by screws 12. The gaps of the hanging cover and the combustion chamber are mutually corresponding and neat, and then the hanging cover is fixed at the top by three screws, so that the air tightness of the combustion chamber is ensured.
In order to fix the temperature sensor probe, a standard thread is arranged on the outer side of the shell of the temperature sensor probe 5, and the temperature sensor probe 5 penetrates through the hanging cover 4 and is fixed on the inner wall of the hanging cover 4 through a screw. The temperature sensor probe is half screwed into the hanging cover and is fastened at one end of the temperature sensor probe through two screws, so that the temperature sensor probe is kept on the inner wall of the hanging cover.
In order to open the combustion chamber conveniently, a magnet handle 13 is arranged on one surface of a transparent glass door of the combustion chamber 1.
When the device is used, a glass door of a combustion chamber is firstly opened by a magnet handle, a combustion vessel is taken out, a certain amount of melted flame-retardant asphalt and gasoline are poured into the combustion vessel, the combustion chamber is placed into the combustion chamber, a timing electronic scale is opened, the initial mass is recorded, the glass door is closed, a tail gas testing device and a temperature display instrument are opened, the initial value is recorded, a fire gun penetrates through a circular hole and goes deep into the upper portion of the combustion vessel to ignite asphalt, wherein the electronic scale is used for recording the combustion time of an asphalt mixture test piece and the mass change before and after combustion, the temperature display instrument is used for displaying the temperature change in the combustion process.
And in the combustion process, observing an electronic scale, recording the mass of the test piece, the combustion temperature and the concentration of combustion tail gas at regular intervals, recording the final time, the mass of the test piece, the test temperature, the concentration of the tail gas and other index data after the combustion is finished, and finally comprehensively determining the quality of the flame-retardant effect of the flame-retardant asphalt by comparing the calculated indexes such as the combustion time, the temperature change condition of the combustion process, the mass change before and after the combustion, the concentration of the combustion tail gas and the like.
The flame retardant property of the asphalt is tested in a simpler and more intuitive mode, the combustion state of the asphalt on site is simulated by utilizing the closed combustion chamber, the electronic scale can directly record the combustion time and the mass change of the test piece before and after combustion, the temperature sensor probe is arranged in the conical hanging cover, the top of the hanging cover is connected with the temperature display instrument and the tail gas detection device, all detection data are obtained quickly, the operation is simple, and a plurality of indexes can be measured at one time; this application combustion chamber and each device are arranged rationally, have both guaranteed the gas tightness of combustion chamber, have avoided loaded down with trivial details operation simultaneously, and convenient to use can test a plurality of signs such as pitch burning time, quality change, temperature variation, combustion products concentration pitch fire-retardant characteristics simultaneously.
The above, only do the preferred embodiment of the present invention, not used to limit the present invention, all the technical matters of the present invention should be included in the protection scope of the present invention for any slight modification, equivalent replacement and improvement of the above embodiments.
Claims (8)
1. The utility model provides an asphalt flame retardant property testing arrangement which characterized in that: the combustion chamber is of a sealed structure, an electronic scale with timing and weighing functions is placed inside the combustion chamber, a combustion vessel is placed on the electronic scale, a hanging cover is fixedly connected to the top inside the combustion chamber, and the hanging cover is hung above the combustion vessel;
the inner wall of the hanging cover is provided with a temperature sensor probe, and the top of the hanging cover is provided with a vent pipe which extends out of the combustion chamber and is connected with an external tail gas detection device.
2. The asphalt flame retardant property test device according to claim 1, characterized in that: the hanging cover is of a cone structure with a narrow upper part and a wide lower part, and the bottom area of the hanging cover completely covers the surface area of the combustion dish.
3. The asphalt flame retardant property test device according to claim 1, characterized in that: one side of the combustion chamber is a transparent glass door, one side of the transparent glass door, which is at the same height with the combustion vessel, is provided with a round hole, and the ignition gun can ignite asphalt in the combustion vessel through the round hole.
4. The asphalt flame retardant property test device according to claim 1, characterized in that: the top of the hanging cover and the top of the combustion chamber are provided with notches which have the same size and are in orderly butt joint, and the notches are used for extending the vent pipe from the top of the hanging cover to be connected with an external tail gas detection device.
5. The asphalt flame retardant property test device according to claim 4, characterized in that: the temperature sensor probe is a high-precision infrared temperature sensor probe, the temperature sensor probe is connected with a data line, and the data line is connected with an external temperature display instrument through a notch.
6. The asphalt flame retardant property test device according to claim 1, characterized in that: the hanging cover is fixed on the top of the combustion chamber through screws.
7. The asphalt flame retardant property test device according to claim 1, characterized in that: and standard threads are arranged on the outer side of the shell of the temperature sensor probe, and the temperature sensor probe penetrates through the hanging cover and is fixed on the inner wall of the hanging cover through screws.
8. The asphalt flame retardant property test device according to claim 1, characterized in that: and a magnet handle is arranged on one surface of the transparent glass door of the combustion chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921045693.0U CN210294196U (en) | 2019-07-05 | 2019-07-05 | Asphalt flame retardant property testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921045693.0U CN210294196U (en) | 2019-07-05 | 2019-07-05 | Asphalt flame retardant property testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210294196U true CN210294196U (en) | 2020-04-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921045693.0U Expired - Fee Related CN210294196U (en) | 2019-07-05 | 2019-07-05 | Asphalt flame retardant property testing device |
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| Country | Link |
|---|---|
| CN (1) | CN210294196U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111766331A (en) * | 2020-07-09 | 2020-10-13 | 安徽工程大学 | Portable building material combustion performance testing device and testing method thereof |
| CN113219124A (en) * | 2021-06-17 | 2021-08-06 | 山东中坚工程质量检测有限公司 | Method for detecting flame-retardant and anti-spreading performance of building main body |
-
2019
- 2019-07-05 CN CN201921045693.0U patent/CN210294196U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111766331A (en) * | 2020-07-09 | 2020-10-13 | 安徽工程大学 | Portable building material combustion performance testing device and testing method thereof |
| CN111766331B (en) * | 2020-07-09 | 2022-08-09 | 安徽工程大学 | Portable building material combustion performance testing device and testing method thereof |
| CN113219124A (en) * | 2021-06-17 | 2021-08-06 | 山东中坚工程质量检测有限公司 | Method for detecting flame-retardant and anti-spreading performance of building main body |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200410 |
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| CF01 | Termination of patent right due to non-payment of annual fee |