CN2283939Y - Fire-resistant cable slot box - Google Patents

Abstract

The utility model relates to a fire-resistant cable slot box, comprising a box body and a box cover. The box body and the box cover are of a sandwich structure and the sandwich layer thereof is a thermal baffle of a thermal expansion type. An expansion gap is arranged between the sandwich layer and a housing. Both the sandwich layer and the housing are provided with heat radiation holes. The periphery of the inner layer of the box is provided with holes. Under the condition of normal running of the utility model, heat can be radiated from the heat radiation holes, which can prolong the service life of the cable. The a fire occurs at the external, because the thermal baffle of a thermal expansion type in the slot box can expand and insulate heat, the cable can continue supplying electricity with the fire endurance time of 60 minutes, providing electric power for fire fighting and other situations which can cause greater loss, such as power failure. Thus, fire loss can be reduced.

Description

Fire-resisting cable groove box

The utility model relates to a kind of fire-resisting cable groove box, and particularly a kind of fire early period of origination can protect cable to keep the fire-resisting cable groove box of one period conduction time.

Along with society makes constant progress, power consumption sharply increases, because the fire that contradiction caused between not the matching of power transmission and distribution facility, imperfection and the supply and demand is more and more frequent, fire number of times that causes because of cable, electrical equipment and the loss that is caused also are progressively ascendant trend according to statistics.The fire that causes except the cable faults itself, or the fire that the electrical appliance fault causes is outside cable spreads, some is the cable fire that outside fire causes.

The fire that causes for cable itself, adopt inorganic non-combustible groove box or closed fire-retardant groove box at present mostly, be used plugging material and make fray-out of flame, but these groove boxes are for outside burning things which may cause a fire disaster, its resistivity is also very limited, and closed fire-retardant groove box thermal diffusivity is very poor, especially the high-capacity dynamical cable, the bad internal temperature rise that causes is too high because of dispelling the heat, cause current-carrying capacity of cable to reduce, and can quicken the aging of insulating material, shorten the useful life of cable.

Fire for the outside generation; mainly be that protection groove box inner cable can continue to send electricity a period of time, for fire extinguishing personnel escape and other provide electric power as the power failure occasion that can result in greater loss, therefore; the fire safe type cable tray has appearred; this groove box is at groove box side coated fireproof paint, plays heat-blocking action, still in transportation, the installation process; fireproof paint easily comes off; thereby influence the fire resistance of groove box, therefore, be necessary to provide a kind of novel fire-resisting cable groove box.

The purpose of this utility model provides a kind of fire-resisting cable groove box, and this groove box has heat dispersion preferably under normal operation except that having fire resistance.

For achieving the above object, the utility model by the following technical solutions, fire-resisting cable groove box comprises box body, lid, described box body, lid are sandwich structure, the sandwich layer of sandwich structure is the thermal expansion type thermal insulation board, sandwich layer and shell leave expansion space, and sandwich layer, shell all have louvre, and the periphery of lid internal layer is furnished with the heat supply expanding material and meets thermal expansion and seal and use the hole.

Described thermal expansion type thermal insulation board is by the heat insulation expanded perlite of light-weight refractory or float the sheet material that pearl, amino resins or EVA resin, blowing agent, polyalcohol, polyphosphate are formed, thickness 5-25mm.

The utility model is described in further detail below in conjunction with accompanying drawing

Fig. 1: the box body partial schematic diagram of the utility model groove box

Fig. 2: the lid partial schematic diagram of the utility model groove box

Fig. 3: the utility model linear pattern groove box box body schematic diagram

Fig. 4: with the supporting lid schematic diagram of Fig. 3

Fig. 5: the utility model perpendicular type groove box box body schematic diagram

Fig. 6: with the supporting lid schematic diagram of Fig. 5

Among Fig. 1,1,4 is the shell and the internal layer of sandwich type groove box box body, 3 is the sandwich layer of sandwich structure, this sandwich layer can use the thermal expansion type thermal insulation board, for example: based on the heat insulation expanded perlite of light-weight refractory, expanded vermiculite, float pearl etc., adopt a kind of in polyvinyl acetate, neoprene emulsion, amino resins, the EVA resin etc. or their mixture as bonding agent, be added with the sheet material that blowing agent and polyphosphate, polyalcohol are processed into again, among the figure, thermal insulation board and shell leave space 2, size is about 0.5-2 times of thickness of slab, between the about 5-25mm of heat insulation thickness of slab.Shell and thermal insulation board all have louvre 5, and the form in hole can be slotted hole or circular hole etc., and sandwich layer and internal layer can adopt gluing connecing, and internal layer and shell are connected with bolt by hole 6.

Fig. 2 represents the lid similar to box body structure, it comprises shell 8 and internal layer 7, the sandwich layer 3 that shell and internal layer have thermal insulation board to make, its shell and thermal insulation board all have louvre, thermal insulation board and shell also leave the space, the internal layer periphery is furnished with the circuitous thermal expansion of heat supply expanding material and seals with hole 9, scurries in the flare when preventing fire.

Fig. 3, Fig. 4 are box body, the lid of linear pattern groove box, and among Fig. 3,1 is shell, and 4 is internal layer, and 3 is thermal insulation board, and 5 is louvre, and 6 is to connect to use the hole; Among Fig. 4,3 is thermal insulation board, and 8 is shell, and 7 is internal layer, and 9 is the hole.

Fig. 5, Fig. 6 are the box body and the lid of perpendicular type groove box, among Fig. 5,1 ' be shell, 4 ' be internal layer, 3 ' be thermal insulation board, 5 ' be louvre, 6 ' hole used for connecting; Among Fig. 6,3 ' be thermal insulation board, 7 ' be internal layer, 8 ' be shell, their structures and Fig. 1, Fig. 2 are together.

In above-mentioned several structure, box body is the fastening back with lid and is connected with box cingulum.

The utility model advantage: under normal operating condition, make the temperature rise of groove box be unlikely to too high by louvre, Be conducive to cable operation, prolong cable service life, when fire appearred in the outside, the thermal expansion type thermal insulation board was sent out Give birth to and expand, volume increases, and it is heat insulation to expand in the space of reserving, in the given time normal to keep cable Power supply, fire resistance period reaches 60 minutes, reduces the loss that fire causes.

Claims (4)

1, a kind of fire-resisting cable groove box, it comprises box body, lid, it is characterized in that described box body, lid are sandwich structure, the sandwich layer of sandwich structure is the thermal expansion type thermal insulation board, sandwich layer and shell leave expansion space, sandwich layer, shell all have louvre, and the periphery of lid internal layer is furnished with the heat supply expanding material and meets thermal expansion and seal and use the hole.

2, fire-resisting cable groove box according to claim 1, it is characterized in that: described thermal expansion type thermal insulation board is by the heat insulation expanded perlite of light-weight refractory or float the sheet material that pearl, amino resins or EVA resin, blowing agent, polyalcohol, polyphosphate are formed, thickness 5-25mm.

3, fire-resisting cable groove box according to claim 1 and 2 is characterized in that: the 0.5-2 that reserves expansion space between described sandwich layer and the shell and be thickness of slab doubly between.

4, fire-resisting cable groove box according to claim 1, it is characterized in that: louvre is shaped as slotted hole or circular hole.

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