CN216388845U

CN216388845U - Explosion-proof multi-core flexible fireproof pre-branch cable

Info

Publication number: CN216388845U
Application number: CN202122766847.9U
Authority: CN
Inventors: 匡松文; 王月; 陆朝燕; 张利军
Original assignee: Hengfei Cable Co ltd
Current assignee: Hengfei Cable Co ltd
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-04-26
Anticipated expiration: 2031-11-12

Abstract

The utility model discloses an explosion-proof multi-core flexible fireproof pre-branch cable which comprises a main cable, wherein a water-blocking tape is arranged on the surface of the right end of the main cable, an aluminum sheath is arranged on the right side of the water-blocking tape, branch wires are arranged on the right side of the main cable, the water-blocking tape is arranged on the surface of the left side of each branch wire, injection-molded sheaths are arranged on the outer sides of the main cable and the branch wires, and an explosion-proof metal box is arranged on the outer side of each injection-molded sheath. The utility model adopts the structure, the material used for injection molding is a high polymer material, and is easy to carbonize at high temperature, so the fire-proof grade is limited, in order to ensure the safe operation of the circuit in fire, the explosion-proof metal box is arranged at the injection molding position according to the volume size, the material of the explosion-proof metal box is aluminum alloy and is divided into an upper piece and a lower piece, the shape and the size of the upper piece and the lower piece are matched with the main cable and the injection molding sheath at the outer side of the branch line, and the two pieces of explosion-proof metal boxes are connected into a whole through the fixing screws, so that the branch part has the whole fire-proof and explosion-proof functions, and the branch part is protected from being damaged by fire.

Description

Explosion-proof multi-core flexible fireproof pre-branch cable

Technical Field

The utility model belongs to the technical field of cable manufacturing, and particularly relates to an explosion-proof multi-core flexible fireproof pre-branch cable.

Background

Along with the development of society, the urbanization process is accelerated, high-rise buildings emerge continuously, and in important places with dense personnel, the fire caused by an electric circuit causes great damage to the life and property safety of people. Safety issues with electrical wiring are drawing a high degree of attention. The fire caused by the electrical wiring problem accounts for 60% of the total number of fires according to the relevant departments. The electrical equipment comprises an automatic alarm system, an emergency electric bell or alarm whistle, a fire pump, a smoke exhauster, a sprinkler, broadcasting equipment, an evacuation channel, an emergency exit marker light, an emergency elevator, an emergency power socket, a control and command hub and the like. If the equipment can normally operate when a fire disaster happens, people can be evacuated quickly at the first time, and firefighters can be deployed for rescue as soon as possible, so that the loss caused by the fire disaster is greatly reduced. Therefore, the fireproof cable is required to be used in various occasions with high fireproof requirements, such as high-rise buildings, large warehouses, ships, oil platforms, subways, spacecrafts, tunnels, hospitals, large commercial buildings, airports, power plants, fireproof alarm systems, airplane control systems and the like. At present, most of the magnesium oxide mineral insulation fireproof cables or the fireproof cables wound by mica tapes are adopted at home and abroad. The magnesium oxide mineral insulated fireproof cable needs special production and processing equipment, which is imported and has very high price. The outer protective layer of the magnesium oxide mineral insulated fireproof cable is all copper, so that the product has higher production cost and is difficult to popularize and use on a large scale, particularly in the field of civil buildings. Due to the rigid and hard structural characteristics of the copper sheath magnesium oxide mineral insulation fireproof cable, the copper sheath magnesium oxide mineral insulation fireproof cable is greatly limited in the processes of production, processing, transportation, laying, installation and use. The mica tape-wound fireproof cable needs to be wound in multiple layers in the production process, and due to the limitation of process conditions, the defects of seams are often caused. And the ablated mica tape is easy to become brittle and fall off, the fireproof effect is poor, and the normal operation of communication and power facilities under the condition of fire is difficult to ensure. The common fire-resistant cable generally adopts a gold mica tape or synthetic mica as a fire-resistant layer material, can meet the conventional performance requirement of 750 ℃/90min, and needs to redesign the cable structure when meeting the performance requirements of pure fire resistance, spraying resistance and impact resistance in British standard BS 8347. The novel multi-core flexible fireproof pre-branch cable can meet the requirement through comparison.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems mentioned in the background technology, the utility model aims to provide an explosion-proof multi-core flexible fireproof pre-branch cable to solve the problems of fire and explosion prevention of the cable.

The technical purpose of the utility model is realized by the following technical scheme:

the anti-explosion multi-core flexible fireproof pre-branch cable comprises a main cable, wherein a water-blocking tape is arranged on the surface of the right end of the main cable, an aluminum sheath is arranged on the right side of the water-blocking tape, branch wires are arranged on the right side of the main cable, a water-blocking tape is arranged on the surface of the left side of each branch wire, the aluminum sheath is arranged on the left side of the water-blocking tape, an insulating wire core is arranged between the main cable and each branch wire, injection molding sheaths are arranged on the outer sides of the main cable and the branch wires, and an anti-explosion metal box is arranged on the outer sides of the injection molding sheaths.

By adopting the technical scheme, through setting up the leader cable, the leader cable plays the effect of undertaking the transmission electric energy, provide power for the branch line, the branch line is direct to connect distributes each floor electric load of high-rise building in the table case through setting up the sheath of moulding plastics, characterized by this material has low smoke and zero halogen fire-retardant characteristic, this material is extruded at branch position through injection molding machine heating melting, form and protect the cable metal sheath, through setting up explosion-proof metal box, its material is the aluminum alloy, divide into upper and lower two, its shape and size suit with the sheath of moulding plastics outside leader cable and branch line, two explosion-proof metal boxes link into an entirety through the set screw, make branch position have whole fire prevention and explosion-proof function, protection branch position avoids the conflagration to damage.

Further, as a preferred technical scheme, a conductor copper connector is arranged at the right end of the main cable, a cabling wrapping belt is arranged on the outer side of the conductor copper connector, and the conductor copper connector is fixedly connected with the insulating wire core through the cabling wrapping belt.

By adopting the technical scheme, the conductor copper joint and the cabling wrapping tape are arranged, the conductor copper joint and the synthetic mica tape are arranged on the inner side of the insulating wire core, the conductor copper joint plays a role in conducting electricity, the synthetic mica tape can resist 950 ℃/180min to keep the circuit complete, and the main cable and the branch line are connected with the insulating wire core through the conductor copper joint.

Further, as a preferred technical scheme, a copper wire is arranged between the main cable and the branch main wire.

By adopting the technical scheme, the copper wire is arranged, and the structure is characterized in that the copper wire is used for connecting the aluminum sheath on the cut-off main cable with the aluminum sheath on the branch line, so that the conduction of the structure is formed, the electric conduction and grounding of the cable under the condition of lightning stroke are facilitated, and the cable is protected from being damaged by overvoltage.

Further, as a preferred technical scheme, the explosion-proof metal box is divided into an upper piece and a lower piece, a fixing screw is arranged on the side face of the explosion-proof metal box, and the two pieces of explosion-proof metal box are fixedly connected through the fixing screw.

By adopting the technical scheme, the anti-explosion metal box is arranged and made of aluminum alloy, the anti-explosion metal box is divided into the upper and the lower pieces, the shape and the size of the anti-explosion metal box are matched with the multi-core flexible fireproof pre-branch cable, and the two anti-explosion metal boxes are connected into a whole through the fixing screws, so that the branch part has the whole fireproof and anti-explosion functions.

Further, as a preferred technical scheme, cable core steel strands are arranged on the outer side of the main cable.

By adopting the technical scheme, the cable core steel strand is formed by twisting 0.2mm low-carbon galvanized steel wire bundles, so that the tensile reinforcing element is provided for the cable, and the aluminum sheath is prevented from being broken during cable construction.

In summary, the utility model mainly has the following beneficial effects:

firstly, the main cable is arranged and plays a role in transmitting electric energy to provide power for the branch line, the branch line is directly connected in a meter box and is distributed to the electric load of each floor of a high-rise building, and an injection molding sheath is arranged, the material is characterized by having low-smoke halogen-free flame retardant property, the material is heated and melted by an injection molding machine and extruded at the branch position to form the protection of a metal sheath of the cable, the joint position is formed by plastic injection molding, the material used for injection molding is a high polymer material and is easy to carbonize at high temperature, so that the fire-proof grade is limited, in order to ensure the safe operation of a line in fire, an explosion-proof metal box is arranged at the injection molding position according to the volume size, the explosion-proof metal box is arranged and is made of aluminum alloy and is divided into an upper piece and a lower piece, the shape and the size of the explosion-proof metal box are matched with the injection molding sheaths at the outer sides of the main cable and the branch line, and the two pieces of explosion-proof metal boxes are connected into a whole through fixing screws, the branch part has the overall fireproof and explosion-proof functions, and is protected from being damaged by fire.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Reference numerals: 1. the cable comprises a main cable, 2, a water blocking tape, 3, an aluminum sheath, 4, a cabling wrapping tape, 5, a conductor copper joint, 6, an injection molding sheath, 7, a cable core steel strand, 8, an insulation wire core, 9, a copper wire, 10, a branch wire, 11, a fixing screw, 12 and an explosion-proof metal box.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1, the explosion-proof multi-core flexible fireproof pre-branched cable described in this embodiment includes a main cable 1, a water-blocking tape 2 is disposed on a right end surface of the main cable 1, an aluminum sheath 3 is disposed on a right side of the water-blocking tape 2, a branch wire 10 is disposed on a right side of the main cable 1, the water-blocking tape 2 is disposed on a left side surface of the branch wire 10, the aluminum sheath 3 is disposed on a left side of the water-blocking tape 2, an insulation core 8 is disposed between the main cable 1 and the branch wire 10, injection-molded sheaths 6 are disposed on outer sides of the main cable 1 and the branch wire 10, an explosion-proof metal box 12 is disposed on an outer side of the injection-molded sheaths 6, the main cable 1 plays a role in transmitting electric energy by disposing the main cable 1, and provides power for the branch wire 10, the branch wire 10 is directly connected in a meter box to distribute electric loads for each floor of a high-rise building by disposing the injection-molded sheaths 6, and is characterized in that the material has low-smoke, halogen-free and flame-retardant properties, this material is extruded at branch position through injection molding machine heating melting, form and protect cable metal sheath, because joint department adopts plastics to mould plastics and forms, the used material of moulding plastics is macromolecular material, easily carbonize to high temperature, therefore the fire protection level is limited, safe operation in the conflagration for the guarantee circuit, set up explosion-proof metal box 12 according to its volume size in the position of moulding plastics, through setting up explosion-proof metal box 12, its material is the aluminum alloy, divide into upper and lower two, its shape and size suit with the sheath 6 of moulding plastics in main cable 1 and branch line 10 outside, two explosion-proof metal boxes 12 link into a whole through fixed screw 11, make branch position have whole fire prevention explosion-proof function, protection branch position avoids the conflagration to damage.

Example 2

Referring to fig. 1, on the basis of embodiment 1, in order to achieve the purpose of connecting a main cable and a branch line 10, the embodiment has an innovative design on the main cable 1, specifically, a conductor copper joint 5 is arranged at the right end of the main cable 1, a cabling tape 4 is arranged on the outer side of the conductor copper joint 5, the conductor copper joint 5 is fixedly connected with an insulation wire core 8 through the cabling tape 4, by arranging the conductor copper joint 5 and the cabling tape 4, the inner side of the insulation wire core 8 is provided with the conductor copper joint 5 and a synthetic mica tape, the conductor copper joint 5 plays a role in conducting electricity, the synthetic mica tape can resist 950 ℃/180min to keep a circuit complete, and the main cable 1 and the branch line 10 are connected through the conductor copper joint 5 and the insulation wire core 8.

Referring to fig. 1, in order to protect the cable, a copper wire 9 is disposed between the main cable 1 and the branch line in this embodiment, and by disposing the copper wire 9, the present invention is characterized in that the copper stranded wire connects the aluminum sheath 3 on the cut-off main cable 1 with the aluminum sheath 3 on the branch line 10 by using the copper wire 9, so as to form conduction of the structure, which is beneficial to conducting and grounding of the cable under a lightning strike, and protect the cable from overvoltage damage.

Referring to fig. 1, in order to achieve the purpose of explosion protection and fire protection, the explosion-proof metal box 12 of this embodiment is divided into an upper sheet and a lower sheet, a fixing screw 11 is disposed on a side surface of the explosion-proof metal box 12, the two explosion-proof metal boxes 12 are fixedly connected through the fixing screw 11, the explosion-proof metal box 12 is made of aluminum alloy, and divided into an upper sheet and a lower sheet, and the shape and size of the upper sheet and the lower sheet are adapted to the multi-core flexible fire protection pre-branch cable, and the two explosion-proof metal boxes 12 are connected into a whole through the fixing screw 11, so that the branch part has the whole fire protection and explosion protection function.

Referring to fig. 1, in order to achieve the purpose of protecting the aluminum sheath 3 in a tensile manner, the cable core steel strand 7 is arranged on the outer side of the main cable 1 in the embodiment, and by arranging the cable core steel strand 7, the cable core steel strand 7 is formed by stranding 0.2mm low-carbon galvanized steel wire bundles, so that a tensile strengthening element is provided for the cable, and the aluminum sheath 3 is prevented from being broken in the cable construction.

The use principle and the advantages are as follows: by arranging the main cable 1, the main cable 1 plays a role of transmitting electric energy and providing power for the branch line 10, the branch line 10 is directly connected in a meter box and is distributed to electric loads of each floor of a high-rise building, and by arranging the aluminum sheath 3, the aluminum sheath 3 longitudinally wraps a metal pipe, and the metal pipe is in a corrugated structure, so that on one hand, the bending performance of the main cable 1 is improved, on the other hand, the main cable 1 is convenient to be connected with the branch line 10 before injection molding, and the aluminum sheath 3 plays a role of blocking the fire resistance of the cable and is an important ring for resisting mechanical impact, because the water blocking tape 2 is processed by polyester non-woven fabrics, adhesives, high-speed expansion high polymer water absorption resin and other materials, the infiltration of rainwater and moisture in the multi-core flexible fire-proof pre-branch cable can be reduced, the service life of the long cable is prolonged, usually, the effect of winding 6-8 layers at two ends of the main cable 1 is optimal, and the injection molding sheath 6 is extruded on the water blocking tape 2 through a mold of an injection molding machine, the cable is bonded and connected into a whole, the structure is favorable for outdoor storage of the cable, namely, the cable has a water-blocking effect, and the cable is protected by arranging the injection molding sheath 6, and is characterized in that the material has low smoke zero halogen flame retardant property, the material is heated and melted by an injection molding machine and extruded at a branch part to form protection for a metal sheath of the cable, the joint part is formed by plastic injection molding, the material used for injection molding is a high polymer material which is easy to carbonize at high temperature, so that the fire-proof grade is limited, in order to ensure the safe operation of the line in fire, the explosion-proof metal box 12 is arranged at the injection molding position according to the size of the injection molding position, the material is an aluminum alloy and is divided into an upper piece and a lower piece, the shape and the size of the upper piece and the lower piece are matched with the injection molding sheath 6 at the outer sides of the main cable 1 and the branch line 10, the two pieces of the explosion-proof metal box 12 are connected into a whole through the fixing screws 11, so that the branch part has the whole fire-proof and explosion-proof functions, the branch part is protected from being damaged by fire, the conductor copper joint 5 and the cabling tape 4 are arranged, the conductor copper joint 5 and the synthetic mica tape are arranged on the inner side of the insulating wire core 8, the conductor copper joint 5 plays a role in conducting electricity, the synthetic mica tape can resist 950 ℃/180min to keep the circuit complete, the main cable 1 and the branch wire 10 are connected with the insulating wire core 8 through the conductor copper joint 5, the cabling tape 4 is a glass fiber tape, and the glass fiber tape is made of high-temperature-resistant high-strength glass fibers and is processed through a special process. The cable insulation belt has the characteristics of high temperature resistance, heat preservation and insulation, fire prevention, flame retardance, corrosion resistance, aging resistance, weather resistance, high strength, smooth appearance and the like, and is mainly divided into a glass fiber heat preservation and insulation belt which can play a role in tightening, can prevent flame from ablating cable insulation under the condition of fire and plays a role in a barrier layer.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a flexible fire prevention of explosion-proof type multicore is branch cable in advance which characterized in that: the cable comprises a main cable (1), a water-blocking tape (2) is arranged on the surface of the right end of the main cable (1), an aluminum sheath (3) is arranged on the right side of the water-blocking tape (2), branch wires (10) are arranged on the right side of the main cable (1), the water-blocking tape (2) is arranged on the surface of the left side of the branch wires (10), the aluminum sheath (3) is arranged on the left side of the water-blocking tape (2), insulating wire cores (8) are arranged between the main cable (1) and the branch wires (10), injection molding sheaths (6) are arranged on the outer sides of the main cable (1) and the branch wires (10), and an explosion-proof metal box (12) is arranged on the outer side of the injection molding sheaths (6).

2. The explosion-proof multi-core flexible fireproof pre-branch cable according to claim 1, wherein: the cable is characterized in that a conductor copper connector (5) is arranged at the right end of the main cable (1), a cabling wrapping belt (4) is arranged on the outer side of the conductor copper connector (5), and the conductor copper connector (5) is fixedly connected with the insulation wire core (8) through the cabling wrapping belt (4).

3. The explosion-proof multi-core flexible fireproof pre-branch cable according to claim 1, wherein: copper wires (9) are arranged between the main cable (1) and the branch main wire.

4. The explosion-proof multi-core flexible fireproof pre-branch cable according to claim 1, wherein: the anti-explosion metal box (12) is divided into an upper piece and a lower piece, a fixing screw (11) is arranged on the side face of the anti-explosion metal box (12), and the two pieces of anti-explosion metal box (12) are fixedly connected through the fixing screw (11).

5. The explosion-proof multi-core flexible fireproof pre-branch cable according to claim 1, wherein: and a cable core steel strand (7) is arranged on the outer side of the main cable (1).