CN218567289U - Small element ignition test device - Google Patents
Small element ignition test device Download PDFInfo
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- CN218567289U CN218567289U CN202222507820.2U CN202222507820U CN218567289U CN 218567289 U CN218567289 U CN 218567289U CN 202222507820 U CN202222507820 U CN 202222507820U CN 218567289 U CN218567289 U CN 218567289U
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Abstract
The utility model relates to a small element ignition test device, which comprises a constant temperature test box, a small element ignition test tank, a camera and a gas circuit unit, wherein the small element ignition test tank and the camera are arranged inside the constant temperature test box, and the camera is arranged above the small element ignition test tank and just faces to an observation window on the upper part of the small element ignition test tank; the gas circuit unit comprises a gas inlet pipeline and a gas outlet pipeline, the gas inlet pipeline comprises a filling valve, an air valve, a flow regulating valve, an air heat balancer and a gas inlet valve, the air valve is connected with the flow regulating valve in series and the filling valve in two paths of gas inlet, and the two paths of gas inlet enter the small element ignition test tank through the heat balancer and the gas inlet valve; the exhaust pipeline comprises an exhaust valve and a vacuum pump which are connected with a pipeline of an air outlet of the small element ignition test tank. The test time of the device is greatly shortened from tens of minutes to tens of seconds; and provides stability and consistency, ensuring the validity of test results.
Description
Technical Field
The utility model relates to a product safety capability test technique, in particular to microelement ignition test device.
Background
At present, the small element ignition test equipment based on the explosion-proof standard carries out the test according to the standard requirement, and the conventional test method comprises the following steps: fixing a small element to be tested in a small element ignition test tank, then placing the small element ignition test tank in a high-low temperature test tank, and ensuring that an observation window of the small element ignition test tank is positioned in the middle of an observation window of the high-low temperature test tank so as to facilitate observation; secondly, opening the high-low temperature test chamber until the temperature reaches the set maximum environmental temperature and is stable, and then switching on a small element power supply; and thirdly, after the temperature sensor arranged on the small element sample is stabilized, opening the high-low temperature test chamber, injecting a certain volume of diethyl ether into the small element ignition test chamber, and then quickly closing the small element ignition test tank and the high-low temperature test chamber for subsequent tests.
The method comprises the following steps: 1) The high and low temperature test chamber in which the small element ignition test tank is placed is usually required to be large, even a step-in test chamber, so as to prevent the temperature from changing sharply caused by opening the door. However, the large high-low temperature test chamber has the risks of long temperature rise time, accumulation of diethyl ether which cannot be discharged in time and suffocation of testers; 2) When the small element is electrified and ether is injected by opening the small element ignition test tank, the temperature change in the small element ignition test tank can be caused, so that the surface temperature of the small element is influenced, the temperature is severely shaken, and the test result is influenced; 3) When the diethyl ether is filled, if a small element ignites the test tank and is not closed in time or the sealing is not good, the consistency is poor, and meanwhile, great explosion hidden danger exists.
Disclosure of Invention
Aiming at the problems of long period, poor consistency and personnel safety risk of the conventional small element ignition test, the small element ignition test device is provided.
The technical scheme of the utility model is that: a small element ignition test device comprises a constant temperature test box, a small element ignition test tank, a camera and a gas circuit unit, wherein the small element ignition test tank and the camera are arranged in the constant temperature test box, and the camera is arranged above the small element ignition test tank and is over against an observation window on the upper part of the small element ignition test tank; the air path unit comprises an air inlet pipeline and an air outlet pipeline, the air inlet pipeline comprises a filling valve, an air valve, a flow regulating valve, an air heat balancer and an air inlet valve, the air valve is connected with the flow regulating valve in series and the filling valve in two paths of air inlet, and the two paths of air inlet enter the small element ignition test tank through the heat balancer and the air inlet valve; the exhaust pipeline comprises an exhaust valve and a vacuum pump which are connected with a pipeline of an air outlet of the small element ignition test tank.
Preferably, the air valve is connected in series with a flow regulating valve for air intake control and intake flow regulation.
Preferably, the filling valve is used for filling diethyl ether, and the filled diethyl ether is sucked into the small element ignition test tank by a vacuum pump of the exhaust pipeline.
Preferably, the air inlet pipeline at the front end of the air inlet valve is provided with a thermal balancer, and the thermal balancer is used for preheating diethyl ether entering the small element ignition test tank.
Preferably, the small element ignition test device further comprises a constant temperature box controller and a control unit, wherein the constant temperature box controller controls the constant temperature inside the constant temperature test box, and the control unit outputs a switching signal to the air valve, the air inlet valve and the exhaust valve, outputs an opening signal to the flow regulating valve, and outputs a starting or stopping signal to the vacuum pump.
The beneficial effects of the utility model reside in that: in the small element ignition test device, the small element ignition test tank is arranged in the constant temperature test box to realize preheating; an air heat balancer is arranged in the air inlet pipeline to realize heat balance; a vacuum pump is arranged on the exhaust pipeline to realize negative pressure suction; the method breaks through the fixed thinking mode of the prior test device by adopting a diethyl ether evaporation method, and achieves the same result as the prior test device in a laboratory. The test time of the device is greatly shortened from tens of minutes to tens of seconds; and stability and consistency are provided, and validity of test results is ensured.
Drawings
Fig. 1 is a schematic structural view of the small element ignition test device of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
The structure schematic diagram of the small element ignition test device shown in fig. 1 comprises a constant temperature test box 1, a small element ignition test tank 2, a control unit 8, a camera 9 and an air path unit.
The small element ignition test tank 2 and the camera 9 are arranged in the constant temperature test box 1, the camera 9 is arranged above the small element ignition test tank 2, and is over against an observation window on the upper part of the small element ignition test tank 2 to record the conditions in the test tank, so that the safety and the reliability of data are improved.
The air path unit comprises an air inlet pipeline and an exhaust pipeline, the air inlet pipeline comprises a filling valve 4, an air valve 3, a flow regulating valve 10, an air heat balancer 11 and an air inlet valve 5, the air valve 3 is connected with the flow regulating valve 10 in series and the filling valve 4 to form two paths of inlet air, and the two paths of inlet air enter the small element ignition test tank 2 through the heat balancer 11 and the air inlet valve 5. The exhaust pipeline comprises an exhaust valve 6 connected with a pipeline at the air outlet of the small element ignition test tank 2 and a vacuum pump 7.
The constant temperature test chamber 1 is internally controlled to be constant in temperature by a constant temperature chamber controller 12.
The air valve 3 is connected in series with a flow regulating valve 10 for air intake control and intake flow regulation.
The filling valve 4 is used for filling diethyl ether, and the vacuum pump 7 of the exhaust pipeline keeps a certain negative pressure in the small element ignition test tank 2 and the air inlet pipeline, so that the filled diethyl ether can be sucked into the small element ignition test tank 2 after the air inlet valve 5 is opened.
The inlet line is provided with a thermal balancer 11 to preheat the diethyl ether entering the small element ignition test pot 2.
Small element ignition test procedure:
1. equipment debugging:
1. placing the small element at a proper position of the small element ignition test tank 2, connecting a wire, arranging a thermocouple, and recording the position; and setting parameters such as test time and the like.
2. Checking the sealing ring, covering the upper cover of the small element ignition test tank 2, clockwise rotating the pressing disc, and closing the cavity of the small element ignition test tank 2;
3. the intake pressure and flow are adjusted and the parameters of the flow control valve 10 are set.
2. Testing phase
1. And (3) operating the constant temperature test box 1, and after the temperature of the constant temperature box reaches the set highest test temperature value, stabilizing the temperature in the small element ignition test tank 2.
2. The check confirms that the panel air valve 3 and the fill valve 4 are in the closed state.
3. And opening the filling valve 4, filling a certain volume of diethyl ether, withdrawing the syringe after filling is finished, and immediately closing the filling valve 4. Opening the camera 9 to start recording;
4. and electrifying the small element, opening a panel air valve 3 of a control box 8, sequentially clicking an exhaust valve 6, an air inlet valve 5 and a 3s of the touch screen, closing the air inlet valve 5 (starting test timing), and starting the ignition test of the small element. At the moment, observing the pressure in the cavity, waiting for about 10s, and closing the exhaust valve 6 when the pressure in the cavity is recovered to 0.002MPa (when the set temperature of the constant temperature test box is 45 ℃, other temperatures are calculated separately);
5. after waiting for 15 minutes, if the ignition phenomena such as cold flame and the like are not ignited or observed, and the thermocouple is not changed violently, the small element ignition test is qualified. A thermal calibration is started. And clicking a test closing button, and clicking a thermal correction button to start thermal correction.
6. And cleaning the pipeline and the small element ignition test tank 2 after the small element ignition test is unqualified or the thermal calibration test is carried out.
3. Result judgment
Respectively testing 5 samples according to the steps, and repeating the steps 1-6 of the test stage; if the temperature drops due to component damage, 5 additional component samples should be added and the test repeated 5 times.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (5)
1. The small element ignition test device is characterized by comprising a constant temperature test box, a small element ignition test tank, a camera and a gas circuit unit, wherein the small element ignition test tank and the camera are arranged in the constant temperature test box, and the camera is arranged above the small element ignition test tank and is opposite to an observation window on the upper part of the small element ignition test tank; the gas circuit unit comprises a gas inlet pipeline and a gas outlet pipeline, the gas inlet pipeline comprises a filling valve, an air valve, a flow regulating valve, an air heat balancer and a gas inlet valve, the air valve is connected with the flow regulating valve in series and the filling valve in two paths of gas inlet, and the two paths of gas inlet enter the small element ignition test tank through the heat balancer and the gas inlet valve; the exhaust pipeline comprises an exhaust valve and a vacuum pump which are connected with a pipeline of an air outlet of the small element ignition test tank.
2. The small element ignition test apparatus of claim 1, wherein the air valve is in series with a flow regulating valve for air intake control and intake flow regulation.
3. The small-element ignition test device of claim 1 or 2, wherein the filling valve is used for filling diethyl ether, and the filled diethyl ether is sucked into the small-element ignition test tank by the vacuum pump of the exhaust line.
4. The small element ignition test apparatus according to claim 3, wherein the air inlet pipe at the front end of the air inlet valve is provided with a thermal balancer to preheat the diethyl ether entering the small element ignition test tank.
5. The small-element ignition test device according to claim 4, further comprising a thermostat controller and a control unit, wherein the thermostat controller controls the constant temperature inside the thermostatic test chamber, and the control unit outputs switching signals to the air valve, the air inlet valve and the exhaust valve, outputs opening signals to the flow regulating valve, and outputs an on or off signal to the vacuum pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222507820.2U CN218567289U (en) | 2022-09-21 | 2022-09-21 | Small element ignition test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222507820.2U CN218567289U (en) | 2022-09-21 | 2022-09-21 | Small element ignition test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218567289U true CN218567289U (en) | 2023-03-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222507820.2U Active CN218567289U (en) | 2022-09-21 | 2022-09-21 | Small element ignition test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218567289U (en) |
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2022
- 2022-09-21 CN CN202222507820.2U patent/CN218567289U/en active Active
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