CN103376198A - A test method for thermal drastic change resistance of glass transparent parts of explosion-proof lamps - Google Patents
A test method for thermal drastic change resistance of glass transparent parts of explosion-proof lamps Download PDFInfo
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Abstract
本发明实施例公开了一种防爆灯具玻璃透明件抗热剧变试验方法，包括：(1)取待检测防爆灯具玻璃透明件样品，将其置于温箱内，将温箱温度调节为t1，所述t1为110℃～290℃，所述防爆灯具玻璃透明件样品在t1温度的温箱内保温1～6小时后取出；(2)提供水温为t2的试验用水，所述t2为20℃～35℃，将取出的所述防爆灯具玻璃透明件样品用所述试验用水检测其抗热剧变性能，观察其有无破裂。若待检测防爆灯具玻璃透明件样品无破裂，则表明防爆灯具玻璃透明件样品能耐受Δt＝t1-t2的热剧变温差。采用本发明提供的试验方法，简便、易操作，能快速有效地检测防爆灯具玻璃透明件抗热剧变性能的优劣。The embodiment of the present invention discloses a method for testing the thermal shock resistance of explosion-proof lamp glass transparent parts, comprising: (1) taking a sample of explosion-proof lamp glass transparent parts to be tested, placing it in an incubator, adjusting the temperature of the incubator to t 1 , wherein t 1 is 110°C to 290°C, and taking out the sample of explosion-proof lamp glass transparent parts after keeping it warm in the incubator at the temperature of t 1 for 1 to 6 hours; (2) providing test water with a water temperature of t 2 , wherein t 2 is 20°C to 35°C, and using the test water to test the thermal shock resistance of the taken-out sample of explosion-proof lamp glass transparent parts, and observing whether it is cracked. If the sample of explosion-proof lamp glass transparent parts to be tested is not cracked, it indicates that the sample of explosion-proof lamp glass transparent parts can withstand the thermal shock temperature difference of Δt=t 1 -t 2. The test method provided by the present invention is simple and easy to operate, and can quickly and effectively test the quality of the thermal shock resistance of explosion-proof lamp glass transparent parts.
Description
技术领域 technical field
本发明涉及一种抗热剧变试验方法，尤其涉及一种防爆灯具玻璃透明件抗热剧变试验方法。The invention relates to a test method for heat resistance to sudden change, in particular to a heat resistance test method for glass transparent parts of explosion-proof lamps.
背景技术 Background technique
随着工业的迅速发展，照明起到越来越重要的作用。透明件是灯具工作时不可或缺的配套部件，具有防护、透光、防眩作用。由于灯具功率大，灯具工作过程中光源的发热会使得透明件温度升高，若遇到下雨或冲洗灯具等恶劣情况，则透明件表面温度突然剧变，如果透明件的抗热剧变性能不能满足要求，则会导致其破裂，最终导致光源和电器部件损坏，增加维修工作和成本，更为严重的情况是透明件破裂会危及人身安全。With the rapid development of industry, lighting plays an increasingly important role. The transparent part is an indispensable supporting part when the lamp works, and has the functions of protection, light transmission and anti-glare. Due to the high power of the lamp, the heat of the light source during the working process of the lamp will increase the temperature of the transparent part. If it encounters bad conditions such as rain or washing the lamp, the surface temperature of the transparent part will suddenly change. If the heat resistance of the transparent part cannot meet the requirements Requirements, it will lead to its rupture, eventually leading to damage to the light source and electrical components, increasing maintenance work and costs, and in more serious cases, the rupture of the transparent part will endanger personal safety.
抗热剧变性能是判断透明件优劣的一个重要安全指标。传统的透明件抗热剧变试验方法，是将透明件样品装在灯具上，在实际使用状态下，输入额定电压工作至热平衡后做热剧变试验。由于实际装灯点灯工作，需每次更换透明件，且试验过程中会出现光源、触发器、电容、镇流器等部件的损坏，这样不仅增加了实验员的工作量，还增加了试验成本。因此，为了保证透明件产品具有合格的抗热剧变性能，一种能简便，并科学有效地检测透明件抗热剧变性能优劣的试验方法变得很必要。Thermal shock resistance is an important safety indicator for judging the quality of transparent parts. The traditional test method for thermal shock resistance of transparent parts is to install the transparent part sample on the lamp, and in the actual use state, input the rated voltage to work until the thermal balance and then do the thermal shock test. Due to the actual installation and lighting work, the transparent parts need to be replaced each time, and the light source, trigger, capacitor, ballast and other components will be damaged during the test, which not only increases the workload of the experimenter, but also increases the cost of the test . Therefore, in order to ensure that transparent parts have qualified thermal shock resistance performance, a simple, scientific and effective test method for detecting the quality of transparent parts thermal shock resistance becomes very necessary.
发明内容 Contents of the invention
本发明实施例所要解决的技术问题在于，提供一种防爆灯具玻璃透明件抗热剧变试验方法，可简便，并科学有效地检测防爆灯具玻璃透明件抗热剧变性能的优劣。The technical problem to be solved by the embodiments of the present invention is to provide a test method for the rapid thermal change resistance of the glass transparent parts of explosion-proof lamps, which can be simple, scientific and effective to detect the pros and cons of the thermal sudden change resistance of the transparent glass parts of explosion-proof lamps.
为了解决上述技术问题，本发明实施例提供了一种防爆灯具玻璃透明件抗热剧变试验方法，包括以下步骤：In order to solve the above-mentioned technical problems, an embodiment of the present invention provides a test method for thermal shock resistance of glass transparent parts of explosion-proof lamps, which includes the following steps:
(1)取待检测防爆灯具玻璃透明件样品，将其置于温箱内，将温箱温度调节为t1，t1为110℃～290℃，所述防爆灯具玻璃透明件样品在t1温度的温箱内保温1～6小时后取出；(1) Take the sample of the glass transparent part of the explosion-proof lamp to be tested, put it in the incubator, adjust the temperature of the incubator to t 1 , and t 1 is 110°C to 290°C, and the sample of the glass transparent part of the explosion-proof lamp is at t 1 Keep warm in the incubator for 1 to 6 hours and then take it out;
(2)提供水温为t2的试验用水，t2为20℃～35℃，将取出的所述防爆灯具玻璃透明件样品用所述试验用水检测其抗热剧变性能，观察其有无破裂。(2) Provide test water with a water temperature of t2 , where t2 is 20°C to 35°C, use the test water to test the thermal shock resistance of the sample of the glass transparent part of the explosion-proof lamp taken out, and observe whether it is broken.
步骤(1)的目的是使得待检测防爆灯具玻璃透明件样品在高温的恶劣条件下，整体达到热平衡状态，以利于后续检测。The purpose of step (1) is to make the sample of the glass transparent part of the explosion-proof lamp to be tested reach a thermal equilibrium state as a whole under the harsh conditions of high temperature, so as to facilitate subsequent detection.
优选地，防爆灯具玻璃透明件样品在t1温度的温箱内保温4小时后取出。步骤(2)中待检测防爆灯具玻璃透明件样品若无破裂，则表明该防爆灯具玻璃透明件样品能耐受Δt＝t1-t2的热剧变温差。Preferably, the sample of the glass transparent part of the explosion-proof lamp is taken out after being kept in an incubator at a temperature of t1 for 4 hours. If the sample of the glass transparent part of the explosion-proof lamp to be tested in step (2) is not broken, it indicates that the sample of the glass transparent part of the explosion-proof lamp can withstand the thermal drastic temperature difference of Δt=t 1 -t 2 .
其中，步骤(2)中用试验用水检测取出的防爆灯具玻璃透明件样品抗热剧变性能的方式不限。Wherein, in step (2), there is no limit to the method of using test water to test the thermal shock resistance of the sample of the glass transparent part of the explosion-proof lamp.
优选地，步骤(2)中试验用水盛装在胶箱内，取出的防爆灯具玻璃透明件样品直接浸入盛装试验用水的胶箱内。Preferably, the test water in step (2) is contained in the plastic box, and the sample of the glass transparent part of the explosion-proof lamp taken out is directly immersed in the plastic box containing the test water.
优选地，步骤(2)中试验用水盛装在具有喷嘴的容器内，试验用水通过喷嘴喷洒在取出的防爆灯具玻璃透明件样品表面。更优选地，步骤(2)中取出的防爆灯具玻璃透明件样品置于铁网格上，铁网格置于一空胶箱上。Preferably, in step (2), the test water is contained in a container with a nozzle, and the test water is sprayed on the surface of the sample of the glass transparent part of the explosion-proof lamp through the nozzle. More preferably, the sample of the glass transparent part of the explosion-proof lamp taken out in step (2) is placed on an iron grid, and the iron grid is placed on an empty plastic box.
经步骤(1)达到热平衡状态的待检测防爆灯具玻璃透明件样品，此状态下的温度值t1为待检测防爆灯具玻璃透明件样品的抗热剧变温差值指标或预测温差值与试验用水的水温值t2之和，当其突然遇到低温的试验用水时，透明件样品发生瞬间温度剧变。由于所有物体都会产生热胀冷缩的效应，如果瞬间温差变化过大，对于玻璃，将会发生破裂，碎裂成无数的小玻璃块。For the sample of the glass transparent part of the explosion-proof lamp to be detected that has reached the thermal equilibrium state through step (1), the temperature value t1 in this state is the temperature difference index of the heat-resistant drastic change of the sample of the glass transparent part of the explosion-proof lamp to be detected or the predicted temperature difference and the ratio of the test water The sum of the water temperature value t 2 , when it encounters the low-temperature test water suddenly, the transparent sample will undergo a sudden temperature change. Since all objects will expand with heat and contract with cold, if the instantaneous temperature difference changes too much, the glass will break and break into countless small glass pieces.
此外，选用胶箱作为试验用水盛装容器，在实验过程中，将采用多个胶箱来盛水，防止试验用水随着放置样品数量过多导致温度发生变化，而影响测试结果。In addition, the plastic box is selected as the test water container. During the experiment, multiple plastic boxes will be used to hold the water to prevent the temperature of the test water from changing due to the large number of samples placed, which will affect the test results.
采用将试验用水直接喷淋到加热的防爆灯具玻璃透明件样品表面的方式进行检测，这样，样品内部没有淋到水，更符合灯具透明件的实际使用情况。The test is carried out by spraying test water directly onto the surface of the heated explosion-proof glass transparent part of the lamp, so that the inside of the sample is not sprayed with water, which is more in line with the actual use of the transparent part of the lamp.
实施本发明实施例，具有如下有益效果：Implementing the embodiment of the present invention has the following beneficial effects:
(1)本发明试验方法在保持透明件失效机理不变的条件下，通过使用温差试验方法，便可有效判断透明件抗热剧变的优劣性能，避免了装灯点灯，多次更换透明件的繁杂程序，从而降低了试验费用和实验人员工作强度；(1) Under the condition of keeping the failure mechanism of the transparent part unchanged, the test method of the present invention can effectively judge the quality of the transparent part's heat-resistant drastic change by using the temperature difference test method, avoiding the need to replace the transparent part multiple times cumbersome procedures, thereby reducing the cost of the test and the work intensity of the experimenters;
(2)本发明试验方法简便、易操作，可将同批次多个样品同时进行检测，缩短了试验周期。(2) The test method of the present invention is simple and easy to operate, multiple samples of the same batch can be tested simultaneously, and the test period is shortened.
具体实施方式 Detailed ways
下面将对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
目前，市场上具有高抗热剧变性能的防爆灯具玻璃透明件产品越来越多，理论上，本发明提供的试验方法适用于具有任意温差值的防爆灯具玻璃透明件产品。具体地，本发明提供的防爆灯具玻璃透明件抗热剧变试验方法，可适用于以下不同情况：At present, there are more and more explosion-proof lamp glass transparent products with high heat resistance performance on the market. In theory, the test method provided by the invention is suitable for explosion-proof lamp glass transparent products with any temperature difference. Specifically, the test method for thermal shock resistance of transparent glass parts of explosion-proof lamps provided by the present invention can be applied to the following different situations:
对于防爆灯具玻璃透明件生产厂家生产的已经标注有抗热剧变温差值指标的防爆灯具玻璃透明件样品，步骤(1)中所述温箱的温度t1设定为所述待检测防爆灯具玻璃透明件样品的抗热剧变温差值指标与所述试验用水的水温t2之和。这样设定温箱的温度，便能保证试验的检测过程中，待检测防爆灯具玻璃透明件样品所承受的热剧变温差试验值，与待检测防爆灯具玻璃透明件样品本应达到的抗热剧变温差值指标一致，从而有效地检测出样品抗热剧变性能指标是否合格。当待检测防爆灯具玻璃透明件样品的抗热剧变性能指标合格时，则不会发生透明件破裂现象；当待检测防爆灯具玻璃透明件样品的抗热剧变性能指标不合格时，透明件将会发生破裂。For the explosion-proof lamp glass transparent part sample produced by the manufacturer of the explosion-proof lamp glass transparent part, the temperature t1 of the thermostat described in step (1) is set to the explosion-proof lamp glass to be tested. The sum of the heat-resistant drastic temperature difference index of the transparent member sample and the water temperature t2 of the test water. Setting the temperature of the incubator in this way can ensure that during the testing process of the test, the thermal drastic change temperature difference test value of the sample of the glass transparent part of the explosion-proof lamp to be tested is the same as the thermal drastic change that the sample of the glass transparent part of the explosion-proof lamp to be tested should have achieved. The temperature difference index is consistent, so as to effectively detect whether the sample's thermal shock resistance performance index is qualified. When the heat resistance performance index of the glass transparent part of the explosion-proof lamp to be tested is qualified, the transparent part will not break; Crack occurs.
另外，对于防爆灯具玻璃透明件生产厂家生产的新产品，要确定其抗热剧变性能的温差值，则可先预测一个温差值的经验值范围，设定多个预测温差值，再多次通过步骤(1)和步骤(2)的试验方法进行摸索测试，最终确定新产品的抗热剧变性能的温差值指标。In addition, for the new products produced by manufacturers of transparent glass parts of explosion-proof lamps, in order to determine the temperature difference value of its thermal shock resistance performance, you can first predict the empirical value range of a temperature difference value, set multiple predicted temperature difference values, and then pass multiple times The test method of step (1) and step (2) is carried out groping test, finally determine the temperature difference value index of the thermal shock resistance performance of new product.
实施例一Embodiment one
一种防爆灯具玻璃透明件抗热剧变试验方法，包括以下步骤：A test method for thermal shock resistance of transparent glass parts of explosion-proof lamps, comprising the following steps:
(1)取同批次待检测防爆灯具玻璃透明件样品20件，已知样品的抗热剧变温差值指标为110℃，测定试验用水的水温t2为30℃，将所述防爆灯具玻璃透明件样品置于设定温度值t1为140℃的温箱内，当温箱温度达到140℃时开始计时，防爆灯具玻璃透明件样品在设定温度值t1为140℃温度下保温4小时达热平衡后取出；(1) Take 20 samples of the same batch of glass transparent parts of explosion-proof lamps and lanterns to be tested. It is known that the heat-resistant drastic temperature difference index of the samples is 110°C, and the water temperature t2 of the test water is 30°C. The sample is placed in an incubator with a set temperature t 1 of 140°C. When the temperature of the incubator reaches 140°C, start timing. The sample of the transparent glass part of the explosion-proof lamp is kept at a temperature of 140°C with a set temperature t 1 for 4 hours. Remove after reaching thermal equilibrium;
(2)将(1)中取出的防爆灯具玻璃透明件样品直接浸入盛装30℃试验用水的胶箱内，观察所述防爆灯具玻璃透明件样品有无破裂。(2) Immerse the sample of the transparent glass part of the explosion-proof lamp taken out in (1) directly into the plastic box containing the test water at 30°C, and observe whether the sample of the transparent glass part of the explosion-proof lamp breaks.
其中，本实施例中的20件所述同一批次待检测防爆灯具玻璃透明件样品采用GB-3836.1.2010-26.5.2灯具玻璃透明件抗热剧变试验方法检测，在110℃热剧变温差值下，没有出现任何破裂现象，因此该系列产品的抗热剧变性能指标合格。Among them, the 20 samples of the same batch of explosion-proof lamp glass transparent parts to be tested in this embodiment were tested by the GB-3836.1.2010-26.5.2 test method for heat resistance of transparent glass parts of lamps and lanterns. Under the conditions, there is no cracking phenomenon, so the thermal shock resistance performance index of this series of products is qualified.
本实施例检测结果为，20件防爆灯具玻璃透明件样品中，没有出现任何破裂现象，与国标法的检测结果一致，因此判定该系列产品的抗热剧变性能指标合格。The test results of this example show that there is no crack in the 20 samples of the glass transparent parts of explosion-proof lamps, which is consistent with the test results of the national standard method. Therefore, it is determined that the thermal shock resistance performance indicators of this series of products are qualified.
实施例二Embodiment two
一种防爆灯具玻璃透明件抗热剧变试验方法，包括以下步骤：A test method for thermal shock resistance of transparent glass parts of explosion-proof lamps, comprising the following steps:
(1)取上述批次的待检测防爆灯具玻璃透明件样品20件，已知样品的抗热剧变温差值指标为120℃，测定试验用水的水温t2为30℃，将所述防爆灯具玻璃透明件样品置于设定温度值t1为150℃的温箱内，当温箱温度达到150℃时开始计时，防爆灯具玻璃透明件样品在设定温度值t1为150℃温度下保温3小时达热平衡后取出；(1) Take 20 samples of the above-mentioned batches of glass transparent parts of explosion-proof lamps and lanterns to be tested. The heat-resistant drastic temperature difference index of the known samples is 120°C, and the water temperature t of the test water is 30°C. The transparent part sample is placed in an incubator with a set temperature value t1 of 150°C. When the temperature of the incubator reaches 150°C, the timing starts. The sample of the glass transparent part of the explosion-proof lamp is kept at a temperature of 150°C with a set temperature value t1 for 3 Take out after reaching thermal equilibrium in 1 hour;
(2)将(1)中取出的防爆灯具玻璃透明件样品直接浸入盛装30℃试验用水的胶箱内，观察所述防爆灯具玻璃透明件样品有无破裂。(2) Immerse the sample of the transparent glass part of the explosion-proof lamp taken out in (1) directly into the plastic box containing the test water at 30°C, and observe whether the sample of the transparent glass part of the explosion-proof lamp breaks.
其中，本实施例中的20件所述同一批次待检测防爆灯具玻璃透明件样品采用GB-3836.1.2010.1-26.5.2防爆灯具玻璃透明件抗热剧变试验方法检测，在120℃热剧变温差值下，有1件防爆灯具玻璃透明件样品发生了破裂现象。Among them, the 20 samples of the same batch of explosion-proof lamp glass transparent parts to be tested in this embodiment were tested using the GB-3836.1.2010.1-26.5.2 test method for thermal shock resistance of explosion-proof lamp glass transparent parts. Under the value, one sample of the glass transparent part of the explosion-proof lamp broke.
本实施例检测结果为，20件防爆灯具玻璃透明件样品中，有1件样品发生了破裂现象，与国标法的检测结果一致，因此判定该系列产品不能承受Δt＝t1-t2即120℃的热剧变温差，因此判定该系列产品的抗热剧变性能指标不合格。The test result of this example shows that among the 20 samples of explosion-proof lamp glass transparent parts, 1 sample has ruptured, which is consistent with the test result of the national standard method. Therefore, it is determined that this series of products cannot withstand Δt=t 1 -t 2 , which is 120 °C thermal shock temperature difference, so it is determined that the thermal shock resistance performance index of this series of products is unqualified.
实施例三Embodiment three
一种防爆灯具玻璃透明件抗热剧变试验方法，包括以下步骤：A test method for thermal shock resistance of transparent glass parts of explosion-proof lamps, comprising the following steps:
(1)取同批次待检测防爆灯具玻璃透明件样品20件，已知样品的抗热剧变温差值指标为230℃，测定试验用水的水温t2为30℃，将所述防爆灯具玻璃透明件样品置于设定温度值t1为260℃的温箱内，当温箱温度达到260℃时开始计时，防爆灯具玻璃透明件样品在设定温度值t1为260℃温度下保温6小时达热平衡后取出；(1) Take 20 samples of the same batch of glass transparent parts of explosion-proof lamps and lanterns to be tested. The heat-resistant drastic temperature difference index of the known samples is 230°C, and the water temperature t2 of the test water is 30°C. The sample is placed in an incubator with a set temperature t 1 of 260°C. When the temperature of the incubator reaches 260°C, the timing starts. The sample of the transparent glass part of the explosion-proof lamp is kept at a temperature of 260°C with a set temperature t 1 for 6 hours. Remove after reaching thermal equilibrium;
(2)将(1)中取出的防爆灯具玻璃透明件样品置于铁网格上，该铁网格置于一空胶箱上，30℃试验用水盛装在具有喷嘴的容器内，通过喷嘴喷洒在防爆灯具玻璃透明件样品表面，观察所述防爆灯具玻璃透明件样品有无破裂。(2) Place the sample of the glass transparent part of the explosion-proof lamp taken out in (1) on the iron grid. The iron grid is placed on an empty plastic box, and the 30°C test water is filled in a container with a nozzle, and sprayed on the surface through the nozzle. The surface of the sample of the transparent glass part of the explosion-proof lamp, and observe whether the sample of the transparent glass part of the explosion-proof lamp is broken.
其中，本实施例中的20件所述同一批次待检测防爆灯具玻璃透明件样品采用GB-3836.1.2010-26.5.2防爆灯具玻璃透明件抗热剧变试验方法检测，在230℃热剧变温差值下，没有出现任何破裂现象，因此该系列产品的抗热剧变性能指标合格。Among them, the 20 samples of the same batch of explosion-proof lamp glass transparent parts to be tested in this embodiment were tested by the GB-3836.1.2010-26.5.2 test method for thermal shock resistance of explosion-proof lamp glass transparent parts. Under the value, there is no cracking phenomenon, so the thermal shock resistance performance index of this series of products is qualified.
本实施例检测结果为，20件防爆灯具玻璃透明件样品中，没有出现任何破裂现象，与国标法的检测结果一致，因此判定该系列产品的抗热剧变性能指标合格。The test results of this example show that there is no crack in the 20 samples of the glass transparent parts of explosion-proof lamps, which is consistent with the test results of the national standard method. Therefore, it is determined that the thermal shock resistance performance indicators of this series of products are qualified.
实施例四Embodiment four
一种防爆灯具玻璃透明件抗热剧变试验方法，包括以下步骤：A test method for thermal shock resistance of transparent glass parts of explosion-proof lamps, comprising the following steps:
(1)取同批次待检测防爆灯具玻璃透明件样品20件，样品的抗热剧变温差值预测值为210～250℃，测定试验用水的水温t2为30℃，先将所述防爆灯具玻璃透明件样品置于设定温度值t1为240℃的温箱内，当温箱温度达到240℃时开始计时，防爆灯具玻璃透明件样品在设定温度值t1为240℃温度下保温1小时达热平衡后取出；(1) Take 20 samples of the same batch of glass transparent parts of explosion-proof lamps and lanterns to be tested. The predicted value of the heat-resistant drastic temperature difference of the samples is 210-250°C. The water temperature t2 of the test water is determined to be 30°C. The sample of transparent glass parts is placed in an incubator with a set temperature value t1 of 240°C. When the temperature of the incubator reaches 240°C, the timing starts, and the samples of transparent glass parts of explosion-proof lamps are kept at a temperature of 240°C with a set temperature value of t1 . Take it out after reaching heat equilibrium for 1 hour;
(2)将(1)中取出的防爆灯具玻璃透明件样品置于铁网格上，该铁网格置于一空胶箱上，30℃试验用水盛装在具有喷嘴的容器内，通过喷嘴喷洒在防爆灯具玻璃透明件样品表面，观察所述防爆灯具玻璃透明件样品有无破裂。(2) Place the sample of the glass transparent part of the explosion-proof lamp taken out in (1) on the iron grid. The iron grid is placed on an empty plastic box, and the 30°C test water is filled in a container with a nozzle, and sprayed on the surface through the nozzle. The surface of the sample of the transparent glass part of the explosion-proof lamp, and observe whether the sample of the transparent glass part of the explosion-proof lamp is broken.
若样品在210℃热剧变温差值下，没有出现任何破裂现象，则重新取同批次待检测防爆灯具玻璃透明件样品20件，将温箱温度t1设置为250℃再重复步骤(1)和(2)进行试验，依此按照每上升10℃的条件设置温箱温度进行试验至有样品出现损坏停止，根据试验结果则可以得出样品的具体抗热剧变温差值。If the sample does not appear any cracking phenomenon under the thermal drastic temperature difference of 210°C, take another 20 samples of the glass transparent parts of the explosion-proof lamps to be tested in the same batch, set the temperature t1 of the thermostat to 250°C and repeat step (1) And (2) to carry out the test, according to this, set the temperature of the thermostat according to the condition of every 10°C increase and carry out the test until the sample is damaged and stop. According to the test result, the specific heat resistance of the sample can be obtained. The temperature difference value.
本实施例中，当温箱温度t1设置为250℃时，透明件样品没有出现任何破裂现象，而当温箱温度t1设置为260℃时，20件待检测防爆灯具玻璃透明件样品中，有3件发生了破裂现象，因此该系列产品不能承受Δt＝t1-t2即230℃的热剧变温差，因此判定该产品的抗热剧变温差值为220℃。In this example, when the thermostat temperature t 1 is set to 250°C, no cracking occurs in the transparent sample, and when the thermostat temperature t 1 is set to 260°C, among the 20 glass transparent samples of explosion-proof lamps to be tested , There were 3 cracks, so this series of products could not withstand the thermal drastic temperature difference of Δt=t 1 -t 2 , that is, 230°C, so it was determined that the thermal drastic temperature difference of this product was 220°C.
以上所述是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本发明的保护范围。The above description is a preferred embodiment of the present invention, and it should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also considered Be the protection scope of the present invention.
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