CN212258380U - Fire-proof cable intermediate junction box - Google Patents

Abstract

The utility model discloses a fireproof cable intermediate junction box, which comprises a junction box body and a box cover, wherein the junction box body is fixedly connected with the box cover through bolts, a sealing gasket is arranged between the top of the junction box body and the box cover, the junction box body is formed by mutually welding a plurality of metal plates, an inner shell is arranged inside the junction box body, wire inlets are connected between the two sides of the inner shell and the junction box body, a wire outlet is connected between the bottom of the inner shell and the junction box body, a flame retardant body is filled between the inner shell and the junction box body, a wiring module is fixed at the top of the inner side of the inner shell, a plurality of wiring terminals are arranged at the bottom of the wiring module, the utility model realizes double-layer protection of cables, greatly enhances the fireproof and explosion-proof performance of the junction box, prevents high voltage from breaking, the effects of explosion prevention and flame retardance are realized.

Description

Fire-proof cable intermediate junction box

Technical Field

The utility model relates to a fire control technical field, in particular to terminal box in middle of fire prevention type cable.

Background

Safety is a primary task in large public areas such as supermarkets, airports, hospitals, tunnels, and the like. When a fire occurs, in order to ensure the functional integrity of the emergency power supply, the specific operation time of the emergency power supply must be ensured, so that the continuous operation of electrical equipment such as emergency lighting, elevators, smoke exhaust and ventilation equipment, alarm systems and the like is kept for 30, 60 or 90 minutes, and people can be ensured to leave the building in a certain time and rescue equipment can work in a certain time when the fire occurs. The fire-proof cable junction box is used as a connecting device commonly used in a cable system, and the importance and the standard requirements of the fire-proof cable junction box are consistent with those of a fire-proof cable. If the distribution box used in the cable system does not meet specific requirements, the functional integrity of the entire cable system is not satisfactory despite the fire protection requirements of the cables used in the cable system.

As an important component part of a fully functional cable system, the cable junction box and the installation device as a whole must meet specific requirements, i.e. in case of fire, no short circuit or open circuit occurs in the current loop within a specific time (30, 60 or 90 minutes), so that the technical performance of the cable junction box has a crucial influence on the functional integrity of the cable system.

At present, no clear and strict related product of the fireproof cable junction box exists in China, the common cable junction box does not have fireproof requirements, and related technical requirements and even technical standards are not clear, so that technical personnel in the field devote to developing a fireproof cable intermediate junction box which can meet the requirement that a power supply system can continuously run for a long time under severe fire conditions, prevent the problems of short circuit and the like in the junction box, and easily cause explosion accidents under high voltage to cause potential safety hazards.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a fire-proof cable intermediate junction box, which can effectively solve the problems of the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a terminal box in middle of fire prevention type cable, includes terminal box body and lid, the terminal box body pass through the bolt with lid fixed connection, terminal box body top with be equipped with seal gasket between the lid, the terminal box body is formed by a plurality of metal sheet mutual welding, the inside of terminal box body is equipped with interior casing, the both sides of interior casing with be connected with the incoming line between the terminal box body, the bottom of interior casing with be connected with the outlet between the terminal box body, interior casing with it has the flame retardant body to fill between the terminal box body, the inboard top of interior casing is fixed with wiring module, wiring module's bottom is equipped with a plurality of binding post.

Preferably, the junction box body and the box cover are both made of steel plates.

Preferably, the bottom end of the box cover is provided with a groove matched with the sealing gasket.

Preferably, the two ends of the box cover are both provided with connecting pieces, and the connecting pieces are provided with mounting holes.

Preferably, the inner side of the wire inlet and the inner side of the wire outlet are both provided with fireproof expansion rings.

Preferably, the connecting terminal is a ceramic terminal.

Preferably, the flame retardant body is flame retardant powder.

Compared with the prior art, the utility model discloses following beneficial effect has: this terminal box in middle of fire prevention type cable, when the conflagration breaing out, the temperature rises and makes the fire prevention expansion ring begin to expand the grow, thereby plug up inlet wire and outlet, and then inside and outside circulation of air of isolated terminal box body, the terminal box body begins to be heated and heaies up simultaneously, and fire-retardant body locates between terminal box body and the interior casing, thereby realize the fire prevention fire-retardant effect, through setting up terminal box body and interior casing, binding post sets up in the inboard top of interior casing, realize the double-deck protection to the cable, the fire prevention and explosion-proof nature of terminal box has been strengthened greatly, prevent that the high pressure from taking place to break, realize explosion-proof fire-retardant effect, terminal box simple structure in the middle of whole fire prevention type cable, high operation convenience.

Drawings

Fig. 1 is a front view of a fireproof cable intermediate junction box according to the present invention;

fig. 2 is the utility model relates to a cross-sectional view of terminal box in middle of fire prevention type cable.

In the figure: 1. a junction box body; 2. a box cover; 3. sealing gaskets; 4. an inner housing; 5. a wire inlet; 6. an outlet; 7. a flame retardant body; 8. a wiring module; 9. a wiring terminal; 10. connecting sheets; 11. fire prevention expansion ring.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

As shown in fig. 1-2, a fireproof cable intermediate junction box comprises a junction box body 1 and a box cover 2, wherein the junction box body 1 is fixedly connected with the box cover 2 through bolts, a sealing gasket 3 is arranged between the top of the junction box body 1 and the box cover 2, the junction box body 1 is formed by welding a plurality of metal plates, an inner shell 4 is arranged inside the junction box body 1, wire inlets 5 are connected between two sides of the inner shell 4 and the junction box body 1, wire outlets 6 are connected between the bottom of the inner shell 4 and the junction box body 1, a flame retardant body 7 is filled between the inner shell 4 and the junction box body 1, a wiring module 8 is fixed at the top of the inner side of the inner shell 4, and a plurality of wiring terminals 9 are arranged at the bottom of the wiring module 8.

In this embodiment, it is preferable that the junction box body 1 and the box cover 2 are both made of a steel plate.

In this embodiment, preferably, the bottom end of the box cover 2 is provided with a groove adapted to the sealing gasket 3.

In this embodiment, preferably, the two ends of the box cover 2 are both provided with connecting pieces 10, and the connecting pieces 10 are provided with mounting holes.

In this embodiment, preferably, the inner sides of the wire inlet 5 and the wire outlet 6 are both provided with a fireproof expansion ring 11.

In this embodiment, preferably, the connection terminal 9 is a ceramic terminal.

In this embodiment, preferably, the flame retardant 7 is flame retardant powder.

It should be noted that the utility model is a fireproof cable intermediate junction box, when in use, when a fire breaks out, the temperature rises to enable the fireproof expansion ring 11 to start expanding and enlarging, thereby blocking the wire inlet 5 and the wire outlet 6, thereby isolating the air circulation between the inside and the outside of the junction box body 1, simultaneously heating the junction box body 1, arranging the flame retardant body 7 between the junction box body 1 and the inner shell 4, thereby realize the fire-retardant effect of fire prevention, through setting up terminal box body 1 and interior casing 4, binding post 9 sets up in the inboard top of interior casing 4, realizes the double-deck protection to the cable, has strengthened the fire and explosion protection nature of terminal box greatly, prevents that high pressure from taking place to break, realizes explosion-proof fire-retardant effect, terminal box simple structure in the middle of whole fire prevention type cable, convenient operation, the effect of use is better for traditional mode.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (7)

1. The utility model provides a terminal box in middle of fire prevention type cable, includes terminal box body (1) and lid (2), its characterized in that: the junction box comprises a junction box body (1), a box cover (2) and a sealing gasket (3) are fixedly connected with the top of the junction box body (1), the junction box body (1) is formed by welding a plurality of metal plates, an inner shell (4) is arranged inside the junction box body (1), wire inlets (5) are connected between two sides of the inner shell (4) and the junction box body (1), wire outlets (6) are connected between the bottom of the inner shell (4) and the junction box body (1), flame retardant bodies (7) are filled between the inner shell (4) and the junction box body (1), a wiring module (8) is fixed at the top of the inner side of the inner shell (4), and a plurality of wiring terminals (9) are arranged at the bottom of the wiring module (8).

2. The fire-resistant cable intermediate junction box according to claim 1, wherein: the junction box body (1) and the box cover (2) are both made of steel plates.

3. The fire-resistant cable intermediate junction box according to claim 1, wherein: the bottom end of the box cover (2) is provided with a groove matched with the sealing gasket (3).

4. The fire-resistant cable intermediate junction box according to claim 1, wherein: both ends of the box cover (2) are provided with connecting pieces (10), and mounting holes are formed in the connecting pieces (10).

5. The fire-resistant cable intermediate junction box according to claim 1, wherein: and fireproof expansion rings (11) are arranged on the inner sides of the wire inlet (5) and the wire outlet (6).

6. The fire-resistant cable intermediate junction box according to claim 1, wherein: the wiring terminal (9) is a ceramic terminal.

7. The fire-resistant cable intermediate junction box according to claim 1, wherein: the flame retardant body (7) is flame retardant powder.

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