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Test device for evaluating fire resistance of large-diameter cable and test method thereof

A fire-resistant performance and test device technology, which is applied in the direction of chemical analysis by means of combustion, can solve the problems that large-diameter cables cannot be guaranteed to burn evenly, and cannot truly reflect the fire-resistant performance of large-diameter cables, so as to improve fire prevention and control capabilities , simple structure, increase the effect of the area of ​​action

Pending Publication Date: 2020-04-28
应急管理部四川消防研究所 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing cable fire resistance test simulates the burning of cable flames with a single blowtorch, which cannot guarantee the uniform burning of large-diameter cables in the experiment, and cannot truly reflect the fire-resistant performance of large-diameter cables

Method used

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  • Test device for evaluating fire resistance of large-diameter cable and test method thereof
  • Test device for evaluating fire resistance of large-diameter cable and test method thereof
  • Test device for evaluating fire resistance of large-diameter cable and test method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1: see Figure 1 to Figure 8 , a test device for evaluating the fire resistance of large-diameter cables, including a test frame 1, a control cabinet 3, a transformer 4, a signal line 5, a double blowtorch device 6, and a sample frame 8; wherein the transformer 4 and the control cabinet 3 respectively arranged on both sides of the test rack 1; the sample rack 8 and the double blowtorch device 6 are arranged on the top of the test rack 1, the sample rack 8 is used for fixing cables, and the double blow torch device 6 It is used to supply fire to the cable fixed by the sample rack 8; it is connected to the double blowtorch device 6 through the gas pipeline 7 to provide fuel for the double blowtorch device 6 to spray fire, and the control cabinet 3 and the transformer 4 pass through the The signal line 5 is connected.

[0055] The working principle of the device is: by setting the test frame to install the sample frame and the double blowtorch device, a safe an...

Embodiment 2

[0078] Embodiment 2: a kind of test method of the test device of evaluating the fire-resistant performance of large-diameter cable, using the test device of evaluating the fire-resistant performance of large-diameter cable in embodiment 1, this method comprises the following steps:

[0079] S1: Make a cable sample, and strip off the sheath at both ends of the cable; the test sample is a finished cable with a length of not less than 1500mm;

[0080] S2: Connect the power supply of the test device for evaluating the fire resistance of large-diameter cables to each aviation plug connector, turn on the power supply, and ensure that the test device for evaluating the fire resistance of large-diameter cables is normally energized; for the convenience of operation and description, during specific implementation, The surface of the control cabinet 3 is provided with a touch screen 12, the bottom of the touch screen 12 is provided with several control buttons 13, the control buttons 13 ...

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Abstract

The invention relates to a test device for evaluating the fire resistance of a large-diameter cable. The test device comprises a test rack, a control cabinet, a transformer, a signal line, a double-blowtorch device and a sample holder. The transformer and a gas cabinet are arranged on the two sides of the test rack respectively, and the control cabinet is arranged on the side, away from the transformer, of the gas cabinet. The sample holder and the double-blowtorch device are arranged at the top of the test rack, the sample holder is used for fixing a cable, and the double-blowtorch device isused for supplying fire to the cable fixed by the sample holder. A gas pipeline is connected with the double-blowtorch device and provides fuel for the double-blowtorch device, and the control cabinetis connected with the transformer through the signal line. An adjusting mechanism is arranged in the test device, and the relative positions of flame and a large-diameter cable in the vertical direction and the horizontal direction can be adjusted in time according to the actual situation, so that it is ensured that when cables with different diameters are tested, the flame temperatures of the fire receiving positions of the cables are basically consistent.

Description

technical field [0001] The invention relates to the field of wire and cable testing, in particular to a test device and a test method for evaluating the fire resistance performance of large-diameter cables. Background technique [0002] Fire-resistant cables refer to cables that can maintain safe operation for a certain period of time under the condition of flame combustion. Fire-resistant cables are widely used in high-rise buildings, subways, power plants, nuclear power plants, tunnels and other important places. my country's existing research on cable fire resistance test methods and test devices is mainly aimed at cables with voltage levels of 1kV and below. Existing fire resistance tests for cables use a single blowtorch to simulate cable flame burning, which cannot ensure that large-diameter cables burn evenly in the experiment, and cannot truly reflect the fire resistance of large-diameter cables. At the same time, the market has put forward requirements for the safe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/12
CPCG01N31/12
Inventor 胡林明高旭唐勇周晓勇叶晨李田
Owner 应急管理部四川消防研究所
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