Power cable trench fire prevention device

Abstract

The invention provides a power cable trench fire prevention device. The power cable trench fire prevention device is arranged in a cable trench. The power cable trench fire prevention device comprisesa plurality of brackets arranged at the bottom of the cable trench and used for accommodating cable joints. Each bracket is of a U-shaped structure with an upward opening. A sand storage box is arranged in the position, over each bracket, of the top of the cable trench. The sand storage boxes store fine dry sand. A sand outlet pipe extends vertically downwards from the bottom of each sand storagebox. The bottom of each sand outlet pipe is provided with a sand outlet located above the top opening of the corresponding bracket. A sealing cap is arranged at each sand outlet. One end of each sealing cap is hinged to the corresponding sand outlet pipe. The other end of each sealing cap and the corresponding sand outlet pipe are provided with a matched lock ring. A temperature sensing cable memory alloy wire used for tightening the lock rings and being capable of being fused at high temperature are wound around the lock rings. The power cable trench fire prevention device has the beneficialeffects of being simple in structure, good in fire extinguishing effect, low in cost, capable of maintaining the fire extinguishing effect for a long time and free of limitation of the effective time, saving the cost and facilitating management.

Description

technical field [0001] The invention relates to a fireproof device for electric cable trenches. Background technique [0002] At present, in the long-distance laying of multiple cables such as power cables and communication cables, the method of laying through cable trenches has been widely used, but due to the large number of various cables arranged in the cable trench and the dense spacing High temperature, especially the cable joints are prone to high temperature and cause fires. The current management of cable trenches relies entirely on manual inspection. When a cable catches fire, it is very easy to spread to other cables or electrical equipment, thus causing serious electricity accidents, and in severe cases, it will also cause indirect damage such as fire, which is extremely harmful. Although there are some fire extinguishing devices, but Generally, there is a validity period for a certain period of time. After the validity period, it is difficult to achieve the fir...

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Problems solved by technology

[0002] At present, in the long-distance laying of multiple cables such as power cables and communication cables, the method of laying through cable trenches has been widely used. However, due to the large number of various cables arranged in the cable trench and the dense spacing High temperature, especially the cable joints are prone to high temperature and cause fires. The current management of cable trenches relies entirely on manual inspection. When a cable catches fire, it is very easy to spread to other cables or electrical equipment, thus causing serious electricity accidents, and in severe cases, it will also cause indirect damage such as fire, which is very harmful. Although there are some fire extinguishing devices, but Generally, there is a validity period for a certain period of time. After the validity period, it is difficult to achieve the fire extinguishing effect. Therefore, it is necessary to update the fire extinguishing equipment for a period of time, and it is not easy to manage.

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