A fire-resistant cable tray

Abstract

The invention discloses a fire-resistant cable bridge. The fire-resistant cable bridge comprises a bridge main body, a plurality of heat dissipation holes are formed in the side wall of the bridge main body, and a fireproof layer is fixedly attached to the inner wall of the bridge main body. A fireproof sliding plate for fire retardance and thermal insulation is arranged, and the bottom end of thefireproof sliding plate is clamped in the sliding groove. A fire retarding mechanism is arranged, and the fire retarding mechanism comprises a fixed wheel, a temperature sensing cavity and a push rod; a temperature sensing cavity is fixed on the bottom wall of the outer side of the bridge main body; a temperature sensing expansion piece is arranged in the temperature sensing cavity; the temperature sensing expansion piece is heated to expand; the push rod can be pushed, and then the conical side surface of the push rod head can push the fixed wheel so as to drive the fireproof sliding plate to slide and then seal heat dissipation holes, therefore, in case of a fire, high temperature can be automatically sensed to seal the cable bridge, and the fireproof layer in the bridge main body is used for stopping fire and insulating heat; and the fireproof sliding plate can be pulled to slide and reset under the action of the elastic force of the reset spring, so that the cable bridge has ventilation, heat dissipation and fire resistance, and can be automatically reset without influencing repeated use.

Description

technical field [0001] The invention relates to the field of bridge equipment, in particular to a fire-resistant cable bridge. Background technique [0002] The cable tray is a device for fixing cables, which can be erected independently or attached to various buildings and pipe gallery supports. It has the characteristics of simple structure, beautiful appearance, flexible configuration and convenient maintenance. The cable tray can be closed or semi-closed Due to the heat generated by the cable itself during operation, the closed design is not conducive to ventilation and heat dissipation. However, in case of fire, the cable bridge with a semi-closed structure cannot play a good role in fire prevention and heat insulation, and it is easy to cause the cable The fire and spread will seriously affect the safety of power transmission. In response to this situation, the existing cable bridge can be sprayed with fire-resistant paint inside. Generally, the thickness is thin, the...

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Problems solved by technology

[0002] The cable tray is a device for fixing cables, which can be erected independently or attached to various buildings and pipe gallery supports. It has the characteristics of simple structure, beautiful appearance, flexible configuration and convenient maintenance. The cable tray can be closed or semi-closed Due to the heat generated by the cable itself during operation, the closed design is not conducive to ventilation and heat dissipation. However, in case of fire, the cable bridge with a semi-closed structure cannot play a good role in fire prevention and heat insulation, and it is easy to cause the cable The fire and spread will seriously affect the safety of power transmission. In response to this situation, the existing cable bridge can be sprayed with fire-resistant paint inside. Generally, the thickness is thin, the fire resistance is limited, and the heat dissipation holes are blocked by the expanded and foamed fireproof coating layer, which is difficult to restore, and there are problems in repeated use.

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