4种电缆沟盖板耐火性能研究

doi:10.16265/j.cnki.issn1003-3033.2023.03.0099

中国安全科学学报 ›› 2023, Vol. 33 ›› Issue (3): 83-89.doi: 10.16265/j.cnki.issn1003-3033.2023.03.0099

4种电缆沟盖板耐火性能研究

孙韬¹(), 张佳庆¹^,^**(), 谢佳², 徐林志³, 周勇³, 范明豪¹

¹ 国网安徽省电力有限公司电力科学研究院电力火灾与安全防护安徽省重点实验室,安徽合肥 230601
² 国网安徽省电力有限公司,安徽合肥 230061
³ 中国科学技术大学火灾科学国家重点实验室,安徽合肥 230022

收稿日期:2022-10-19 修回日期:2023-01-12 出版日期:2023-03-28
通讯作者:
**张佳庆(1987—),男,安徽桐城人,博士,高级工程师,主要从事电气安全防护技术方面的工作。E-mail: dkyzjq@163.com。
作者简介:
孙韬 (1993—),男,安徽桐城人,硕士,工程师,主要从事电气安全防护技术方面的工作。E-mail:xkssun@163.com,
谢佳高级工程师,
周勇工程师,
范明豪教授级高级工程师
基金资助:
国家电网有限公司科学技术项目(5200-202156074A-0-0-00)

Experimental study on fire resistance of four kinds of cable trench cover plate

SUN Tao¹(), ZHANG Jiaqing¹^,^**(), XIE Jia², XU Linzhi³, ZHOU Yong³, FAN Minghao¹

¹ Anhui Key Laboratory of Electric Fire and Safety Protection, Electric Power Research Institute, State Grid Anhui Electric Power Research Institute, Hefei Anhui 230601, China
² State Grid Anhui Electric Power Co., Ltd., Hefei Anhui 230061, China
³ State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei Anhui 230022, China

Received:2022-10-19 Revised:2023-01-12 Published:2023-03-28

摘要/Abstract

摘要：

为探究实际火灾场景中流淌火对不同种类电缆沟盖板耐火性能的影响机制,提升变电站火灾防控能力,开展流淌火作用下4种电缆沟盖板耐火性能试验以及标准试验炉试验。研究表明:在标准试验炉内2种高分子复合材料盖板在较短时间内失效,2种混凝土盖板2 h仍未失效。在模拟流淌火作用下的非标准试验中,卡槽式盖板背火面温升速率最快,砂浆抹面的混凝土盖板温升速率最慢。供油速度为72.5 g/s时,卡槽式盖板有效耐火时间在130 s左右,加铺防火布的高分子盖板有效耐火时间在40 min左右,2种混凝土盖板的有效耐火时间均超过2 h。加铺防火布的混凝土盖板背火面温升随供油速率增大而增大,但增速较小。砂浆抹面和加铺防火布的2种混凝土盖板耐火性能最优,卡槽式和加铺防火布的2种高分子复合材料盖板耐火性能较差。建议变电站变压器等充油设备附近电缆沟盖板采用混凝土盖板。

关键词: 变电站火灾, 电缆沟盖板, 耐火性能, 流淌火, 平均温升

Abstract:

In order to explore the impact mechanism of flowing fire on the fire resistance of different types of cable trench cover plates in the actual fire scene, and improve the fire prevention and control ability of substations, a series of fire resistance tests of cable trench cover plates under flowing fire and standard test furnace tests were carried out. The research shows that two kinds of polymer composite cover plates fail in a short time in the standard test furnace, while two kinds of concrete cover plates do not fail after 2 hours. In the non-standard test under simulated flowing fire, the temperature rise rate of the back fire surface of the grooved cover plate is the fastest, while that of the concrete cover plate plastered with mortar is the lowest. When the oil supply speed is 72.5 g/s, the effective fire resistance time of the slotted cover plate is about 130 s, and that of the polymer cover plate with fireproof cloth is 40 min. The effective fire resistance time of the two kinds of concrete covers is more than 2 h. The temperature rise on the back fire surface of the concrete cover plate with fireproof cloth increases with the increase of oil supply rate, but the increase rate is small. The two kinds of concrete cover plates with mortar plastering and fireproof cloth have the best fire resistance, while the two kinds of polymer composite cover plates with grooved and fireproof cloth have poor fire resistance. According to the test results, the concrete cover plate is recommended for the cable trench cover near the transformer and other oil filled equipment in the substation.

Key words: substation fire accident, cable trench cover plate, fire resistance, flowing fire, average temperature rise

孙韬, 张佳庆, 谢佳, 徐林志, 周勇, 范明豪. 4种电缆沟盖板耐火性能研究[J]. 中国安全科学学报, 2023, 33(3): 83-89.

SUN Tao, ZHANG Jiaqing, XIE Jia, XU Linzhi, ZHOU Yong, FAN Minghao. Experimental study on fire resistance of four kinds of cable trench cover plate[J]. China Safety Science Journal, 2023, 33(3): 83-89.

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盖板类型	盖板A			盖板B			盖板C						盖板D
工况	A-1	A-2	A-3	B-1	B-2	B-3	C-1	C-2	C-3	C-4	C-5	C-6	D-1	D-2
供油速率/ (g·s^-1)	101.5	72.5	72.5	101.5	72.5	72.5	101.5	87	72.5	58	72.5	72.5	72.5	72.5
试验类型	预试验	正式试验	正式试验	预试验	正式试验	正式试验	预试验	正式试验	正式试验	正式试验	正式试验	正式试验	正式试验	正式试验
供油时间/min	—	—	—	—	—	—	—	40	40	40	40	120	40	120

检测项目	盖板A	盖板B	盖板C	盖板D
承载能力	≥ 4	≥ 31	≥ 121	≥ 121
完整性	≥ 4	≥ 31	≥ 121	≥ 121
隔热性	4 (181 ℃)	31 (148 ℃)	≥ 121 (58.7 ℃)	≥ 121 (108 ℃)

盖板类型	盖板A		盖板B		盖板C		盖板D
工况编号	A-2	A-3	B-2	B-3	C-5	C-6	D-1	D-2
试验结束时的盖板状态	拼接处出现缝隙	拼接处出现缝隙	拼接处出现缝隙	拼接处出现缝隙	完整	完整	砂浆层出现破裂	砂浆层出现破裂
失效时间	124 s	135 s	2 502 s	2 241 s	> 40 min	> 120 min	> 40 min	> 120 min
最高温度/℃	—	—	—	—	51.6	125.4	48.7	107.4
平均温度/℃	—	—	—	—	24.3	93.1	24.4	86.2

供油速率/ (g·s^-1)	工况编号	最高温升/ ℃	平均温升/ ℃
87	C-2	49.3	26.7
72.5	C-3	47.6	24.3
58	C-4	36.7	21.2

4种电缆沟盖板耐火性能研究

Experimental study on fire resistance of four kinds of cable trench cover plate

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