CN211604720U - Multicore isolated form metallic aluminum sheath is branch fireproof cable in advance - Google Patents
Multicore isolated form metallic aluminum sheath is branch fireproof cable in advance Download PDFInfo
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- CN211604720U CN211604720U CN202020290024.6U CN202020290024U CN211604720U CN 211604720 U CN211604720 U CN 211604720U CN 202020290024 U CN202020290024 U CN 202020290024U CN 211604720 U CN211604720 U CN 211604720U
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Abstract
The utility model relates to a multicore isolated form metallic aluminum sheath is branch fireproof cable in advance. The problem of cable branch need adopt the installation of feeder pillar inconvenient, fire behavior is not good is solved. The utility model provides a branch fireproof cable is in advance covered to multicore isolated form metal aluminum sheath, includes branch package, main cable and branch cable, and branch package parcel main cable and branch cable, main cable run through in whole branch package, and branch cable end is connected in branch package with the main cable, and branch cable extends out from the one end of branch package. The beneficial effects of the utility model are that adopt the structure of branch package, lay for the installation and provide very big convenience, the design of many conductor sinle silks has reduced occuping of space, and the skin effect reduces, has reduced the line loss, and multilayer structure's design has increased the heat resistance of cable.
Description
Technical Field
The utility model relates to a power cable technical field especially relates to a multicore isolated form metal aluminum sheath is branch fireproof cable in advance.
Background
The fireproof cable that is being used in the market at present, traditional fireproof cable is mainly mineral insulation magnesium oxide cable, magnesium oxide cable receives raw materials, equipment length restriction, production length is short, easily absorb moisture, and the price is high, market urgent need is more economical and practical's flexible fireproof cable, simultaneously, because the branch line is more in the work progress, need install a large amount of branch casees, increased the construction degree of difficulty, destroy the wholeness of cable simultaneously, for example, application number is CN201220274247.9 name is called a multicore fire-resistant power cable, including many alloy conductors respectively wrap up the flame retardant coating in proper order outward, insulating layer of pottery silicon rubber material constitutes insulating core, insulating core twists the bunched packing core with high temperature resistant glass silk and becomes the central stranding and constitutes the cable core, the cable core wraps up around the covering, form inlayer around the covering adopting high temperature resistant polyester area, the inlayer, The high-flame-retardant glass fiber band forms an outer layer, the high-temperature-resistant magnesium oxide powder and the glass fiber band are combined to form a filling layer between the wrapping layer and the cable core, and an inner sheath layer, an armor layer and an outer sheath layer are sequentially arranged outside the wrapping layer. The filling is added with magnesium oxide, which is easy to absorb moisture, and the branch box is used.
The multi-core isolated metal aluminum sheath pre-branching fireproof cable is relatively low in manufacturing cost, convenient and quick to install and lay, and the insulation resistance of the cable is improved by the aid of the extruded insulation structure while the advantages of the traditional fireproof cable are kept. Meanwhile, the use of a branch box is reduced, and the integrity of the cable is ensured. The isolated metallic aluminum sheath pre-branching fireproof cable can almost meet the requirements of various specifications of common 0.6/1kV power cables.
SUMMERY OF THE UTILITY MODEL
The utility model provides a general cable branch need adopt the installation of feeder pillar inconvenient, the not good problem of fire behavior, provide a multicore isolated form metallic aluminum sheath branch fireproof cable in advance.
In order to solve the technical problem of the existence, the technical scheme of the utility model is that: a multi-core isolation type pre-branching fireproof cable with a metal aluminum sheath comprises a branch bag, a main cable and a branch cable, wherein the branch bag wraps the main cable and the branch cable, the end part of the branch cable is connected with the main cable in the branch bag, and the branch cable extends out from one end of the branch bag. After the branch cable and the main cable are connected and fixed, low-smoke halogen-free polyolefin injection molding materials are integrally poured outside the connection part to form the branch bag. The structure that integrative pouring formed is firm and fixed effectual. One end of the branch package extends out of the main cable, and the other end of the branch package extends out of the branch cable and the main cable. The structure is utilized to replace a common branch box to realize the branching of the line, thereby providing great convenience for installation and laying and saving the cost.
As a preferred version of the above, the main cable and the branch cable each comprise four conductor cores and respective protective layers. The structure of the multi-core cable occupies less space, and is convenient to install and lay, and the skin effect of the cable is reduced, and the loss of the line is reduced. The first protective layer ensures insulation between conductor wire cores and plays a certain protective role.
As a preferred scheme of the scheme, the conductor wire core is sequentially coated with a layer of mineral belt and a layer of cross-linked polyethylene insulating material from inside to outside. The mineral belt is not flammable per se and cannot become a source of life due to overload breakdown. The crosslinked polyethylene insulating material has light weight, good heat resistance, no melting and high mechanical strength, and can well protect the wire core.
As a preferable scheme of the above scheme, the protective layer is of a multilayer structure and sequentially comprises a mineral belt for cabling, a welding embossing aluminum sheath, a mineral belt, a fireproof oxygen-insulating layer and a low-smoke halogen-free polyolefin outer sheath from inside to outside. Each layer has certain heat resistance, and particularly, the outermost low-smoke halogen-free polyolefin outer sheath has better flame-retardant property, no halogen acid gas is released during combustion, and the smoke quantity is small.
As an optimal scheme of the scheme, the multicore isolation type metal aluminum sheath pre-branching fireproof cable further comprises four small copper sleeves and a large copper sleeve, wherein the small copper sleeves and the large copper sleeve are of oval structures, the inner walls of the small copper sleeves and the large copper sleeve are provided with radial stripes, the outer walls of the small copper sleeves and the large copper sleeve are provided with axial stripes, the small copper sleeves and the large copper sleeve are axially provided with a notch, the small copper sleeves are sleeved on conductor cores of the main cable and conductor cores of the branch cable in a pressing and fixing mode, and the large copper sleeves are sleeved on the main cable and the branch cable in a pressing and fixing mode. The small-sized copper sleeve and the large-sized copper sleeve are connected and fixed with the cable or the cable core in the same mode, the copper sleeve is firstly sleeved on the two cable cores or the cable to be connected and fixed, and then the pressing pliers are used for pressing the copper sleeve to enable the two side faces of the copper sleeve to be closed inwards, so that the two cable cores or the cable are connected and fixed. Before the wire cores are connected and fixed, various protective layers coated on the connection and fixation positions are removed. The radial stripes are arranged on the inner wall to prevent the copper sleeve from sliding back and forth, and the axial stripes are arranged on the outer wall to prevent the outer walls on two sides from sliding left and right. The large copper bush is additionally arranged to fixedly connect the main cable and the branch cable so as to prevent the small copper bush from being fixed and loosened when the small copper bush is pulled. The small copper bush and the large copper bush have the same structure, and the difference is only in size.
As a preferable scheme of the above scheme, the joints of the four conductor cores of the main cable and the branch cable are sequentially arranged in a staggered manner, and a layer of wrapped mineral tape is further coated outside the joints after crimping. The conductor core of the main cable and the conductor core of the branch cable are connected and fixed in a staggered mode in the axial direction through the copper sleeve, the copper sleeve is not in contact with the copper sleeve, the purpose of doing so is to save space, meanwhile, the possibility of short circuit caused by contact is avoided to a certain extent, and the wrapping of the wrapping mineral tape is used for better insulation between the conductor cores.
As an optimal scheme of above-mentioned scheme, branch package is formed by first cylinder, second cylinder and a round platform body coupling, and first cylinder one end and second cylinder are connected, and the bottom surface is connected under the other end of first cylinder and the round platform, the cross-section of second cylinder is greater than the cross-section of first cylinder, has contained in the second cylinder main cable and branch cable, the conductor sinle silk of main cable and the conductor sinle silk of branch cable connect fixedly in first cylinder. The connection part of the conductor core of the main cable and the conductor core of the branch cable occupies a small volume, and the main cable and the branch cable occupy a large volume, so that the section of the second cylinder is larger than that of the first cylinder.
As a preferable scheme of the scheme, the material adopted by the branch bag is low-smoke halogen-free polyolefin injection molding material. The low-smoke halogen-free polyolefin injection molding material is selected for low-smoke halogen-free property, because the low-smoke halogen-free polyolefin injection molding material can not generate a large amount of dense smoke and toxic gas in case of fire, and has high oxygen index and difficult combustion.
As a preferable scheme of the above scheme, the branch bag is long, and a layer of aluminum metal shell is further coated outside the branch bag. In the actual installation environment, the situation of collision is inevitable, and the branch package can be well protected from being damaged by adding a layer of aluminum metal shell outside the branch package.
As a preferable scheme of the above scheme, a circle of sheath extends outwards from the end face of the branch package and the connection part of the main cable and the branch cable, and the sheath is wrapped on the main cable and the branch cable. The sheath can reduce the abrasion of the cable to a certain extent.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the structure of the branch bag is adopted, so that great convenience is provided for installation and laying;
2. due to the design of the plurality of conductor wire cores, the occupied space is reduced, the skin effect is reduced, and the line loss is reduced;
3. due to the design of a multilayer structure, the heat resistance of the cable is improved;
4. the plastic outer sleeve is adopted, so that moisture absorption is not easy;
5. the coating is made of a plurality of layers of heat-resistant materials, and the fireproof performance is excellent.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic diagram of the cable structure of the present invention;
fig. 3 is a schematic structural diagram of a junction between a conductor core of a main cable and a conductor core of a branch cable according to the present invention;
fig. 4 is a partial longitudinal sectional view of the junction of the conductor core of the main cable and the conductor core of the branch cable of the present invention;
fig. 5 is a schematic structural view of the junction of the main cable and the branch cable of the present invention;
fig. 6 is a schematic structural view of the small copper bush of the present invention.
1-conductor wire core, 2-mineral tape, 3-crosslinked polyethylene insulating material, 4-mineral tape for cabling, 5-welding embossing aluminum sheath, 7-fireproof oxygen insulation layer, 8-low smoke zero halogen polyolefin outer sheath, 9-protective layer, 10-branch package, 11-main cable, 12-branch cable, 13-small copper sheath, 14-large copper sheath, 151-radial stripe, 152-axial stripe, 153-notch, 16-lapping mineral tape, 17-aluminum metal shell, 18-sheath, 19-first cylinder, 20-second cylinder and 21-round table.
Detailed Description
The technical solution of the present invention is further described below by way of examples and with reference to the accompanying drawings.
Example (b): the multi-core isolated type pre-branched fireproof cable with the metal aluminum sheath comprises a branch packet 10, a main cable 11 and a branch cable 12, wherein the branch packet wraps the main cable and the branch cable, the end part of the branch cable is connected with the main cable in the branch packet, and the branch cable extends out from one end of the branch packet, as shown in fig. 1. After the branch cable and the main cable are connected and fixed, low-smoke halogen-free polyolefin injection molding materials are integrally poured outside the connection part to form the branch bag. The structure that integrative pouring formed is firm and fixed effectual. One end of the branch package extends out of the main cable, and the other end of the branch package extends out of the branch cable and the main cable. The structure is utilized to replace a common branch box to realize the branching of the line, thereby providing great convenience for installation and laying and saving the cost.
Wherein both the main cable and the branch cable comprise four conductor cores 1 and corresponding protective layers 9. The protective layer wraps the four conductor wire cores. The structure of the multi-core cable occupies less space, and is convenient to install and lay, and the skin effect of the cable is reduced, and the loss of the line is reduced. The first protective layer ensures insulation between conductor wire cores and plays a certain protective role. Each conductor wire core is sequentially coated with a layer of mineral belt 2 and a layer of crosslinked polyethylene insulating material 3 from inside to outside. The mineral belt is not flammable per se and cannot become a source of life due to overload breakdown. The crosslinked polyethylene insulating material has light weight, good heat resistance, no melting and high mechanical strength, and can well protect the wire core. The protective layer is of a multilayer structure and sequentially comprises a mineral belt 4 for cabling, a welding embossing aluminum sheath 5, a mineral belt, a fireproof oxygen-insulating layer 7 and a low-smoke halogen-free polyolefin outer sheath 8 from inside to outside. Each layer has certain heat resistance, and particularly, the outermost low-smoke halogen-free polyolefin outer sheath has better flame-retardant property, no halogen acid gas is released during combustion, and the smoke quantity is small.
The multicore isolation type metal aluminum sheath pre-branching fireproof cable also comprises four small copper sleeves 13 and a large copper sleeve 14,
all be equipped with axial stripe 152 on radial stripe 151 and the outer wall on small-size copper sheathing and the large-scale copper sheathing all be oval structure and the inner wall, all have a breach 153 in small-size copper sheathing and the large-scale copper sheathing axial, and the conductor sinle silk that small-size copper sheathing lived the main cable is fixed with the conductor sinle silk pressfitting of branch cable, and the large-scale copper sheathing entangles main cable and branch cable pressfitting is fixed. The small-sized copper sleeve and the large-sized copper sleeve are connected and fixed with the cable or the cable core in the same mode, the copper sleeve is firstly sleeved on the two cable cores or the cable to be connected and fixed, and then the pressing pliers are used for pressing the copper sleeve to enable the two side faces of the copper sleeve to be closed inwards, so that the two cable cores or the cable are connected and fixed. Before the wire cores are connected and fixed, various protective layers coated on the connection and fixation positions are removed. The radial stripes are arranged on the inner wall to prevent the copper sleeve from sliding back and forth, and the axial stripes are arranged on the outer wall to prevent the outer walls on two sides from sliding left and right. The large copper bush is additionally arranged to fixedly connect the main cable and the branch cable so as to prevent the small copper bush from being fixed and loosened when the small copper bush is pulled. The small copper bush and the large copper bush have the same structure, and the difference is only in size.
The junctions of the four conductor wire cores of the main cable and the branch cable are arranged in a staggered mode in sequence, and a layer of wrapping mineral tape 16 is further coated at the junctions after crimping. As shown in fig. 3, the positions where the conductor cores of the main cable and the branch cable are connected and fixed by the copper sleeve are staggered in the axial direction, and the copper sleeve are not in contact with each other. Because one cable includes four conductor cores, and the conductor cores are arranged two by two side (as shown in fig. 2), in fig. 3, the two conductor cores on the left side are located outside, and the two conductor cores on the right side are located inside. The purpose of this is to save space and to avoid the possibility of short circuit due to contact to a certain extent, and the wrapping mineral tape is used for better insulation between the conductor cores.
The branch package is formed by first cylinder 19, second cylinder 20 and a round platform 21 body coupling, and first cylinder one end and second cylinder are connected, and the other end and the round platform of first cylinder are connected in the bottom surface down, the cross-section of second cylinder is greater than the cross-section of first cylinder, has contained in the second cylinder main cable and branch cable, the conductor sinle silk of main cable and branch cable's conductor sinle silk are fixed at first cylinder in-connection. The connection part of the conductor core of the main cable and the conductor core of the branch cable occupies a small volume, and the main cable and the branch cable occupy a large volume, so that the section of the second cylinder is larger than that of the first cylinder.
And finally, the branch bag is made of low-smoke halogen-free polyolefin injection molding material. The low-smoke halogen-free polyolefin injection molding material is selected for low-smoke halogen-free property, because the low-smoke halogen-free polyolefin injection molding material can not generate a large amount of dense smoke and toxic gas in case of fire, and has high oxygen index and difficult combustion. The shape of the branch bag is designed into a long strip shape, and the branch bag is also covered with a layer of aluminum metal shell 17. In the actual installation environment, the situation of collision is inevitable, and the branch package can be well protected from being damaged by adding a layer of aluminum metal shell outside the branch package. The end face of the branch package and the connection part of the main cable and the branch cable extend outwards to form a circle of sheath 18, and the sheath is coated on the main cable and the branch cable. The sheath can reduce the abrasion of the cable to a certain extent.
Claims (10)
1. The utility model provides a branch fireproof cable is in advance covered to multicore isolated form metal aluminum sheath, its characterized in that includes branch package (10), main cable (11) and branch cable (12), and branch package parcel main cable and branch cable, main cable run through in whole branch package, and branch cable end is connected with main cable in branch package, and branch cable extends out from the one end of branch package.
2. The multi-core isolated metal aluminum sheath pre-branching fireproof cable as claimed in claim 1, wherein the main cable (11) and the branch cable (12) both comprise a plurality of conductor cores (1) and a protective layer (9).
3. The multi-core isolated type metal aluminum sheath pre-branching fireproof cable as claimed in claim 2, wherein the conductor core (1) is sequentially coated with a layer of mineral tape (2) and a layer of cross-linked polyethylene insulation material (3) from inside to outside.
4. The multi-core isolated type pre-branched fireproof cable with the metal aluminum sheath according to claim 2, wherein the protective layer is of a multilayer structure and sequentially comprises a mineral tape (4) for cabling, a welded embossed aluminum sheath (5), a mineral tape (2), a fireproof oxygen-insulating layer (7) and a low-smoke halogen-free polyolefin outer sheath (8) from inside to outside.
5. The multi-core isolated pre-branching fireproof cable with the metal aluminum sheath as claimed in claim 1, further comprising a plurality of small copper sheaths (13) and a large copper sheath (14), wherein the small copper sheaths and the large copper sheath are both in an oval structure, the inner wall of each small copper sheath is provided with radial stripes (151), the outer wall of each small copper sheath is provided with axial stripes (152), the small copper sheaths and the large copper sheaths are axially provided with a gap (153), the small copper sheaths are used for sheathing the conductor cores (1) of the main cable (11) and the conductor cores of the branch cables (12) and are fixed in a pressing manner, and the large copper sheaths are used for sheathing the main cable and the branch cables and are fixed in a pressing manner.
6. The multi-core isolated metal aluminum sheath pre-branching fireproof cable as claimed in claim 5, wherein the joints of the conductor cores of the main cable and the branch cable are arranged in a staggered manner in sequence, and a layer of wrapped mineral tape (16) is further coated on the joints after crimping.
7. The multi-core isolated pre-branching fireproof cable with the metal aluminum sheath as claimed in claim 1 or 5, wherein the branching package (10) is formed by integrally connecting a first cylinder (19), a second cylinder (20) and a circular truncated cone (21), one end of the first cylinder is connected with the second cylinder, the other end of the first cylinder is connected with the lower bottom surface of the circular truncated cone, the cross section of the second cylinder is larger than that of the first cylinder, the second cylinder contains the main cable (11) and the branch cable (12), and the conductor core (1) of the main cable and the conductor core of the branch cable are fixedly connected in the first cylinder.
8. The multi-core isolated metal aluminum sheath pre-branching fireproof cable according to claim 7, wherein the branching package (10) is made of low smoke halogen-free polyolefin injection molding material.
9. The multi-core isolated metal aluminum sheath pre-branching fireproof cable according to claim 7, wherein the branch packet (10) is strip-shaped, and an aluminum metal shell (17) is further coated outside the branch packet.
10. The multi-core isolated metal aluminum sheath pre-branching fireproof cable as claimed in claim 7, wherein a ring of sheath (18) extends outwards from the end face of the branch pack (10) and the connection part of the main cable (11) and the branch cable (12), and the sheath is wrapped on the main cable and the branch cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020290024.6U CN211604720U (en) | 2020-03-10 | 2020-03-10 | Multicore isolated form metallic aluminum sheath is branch fireproof cable in advance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020290024.6U CN211604720U (en) | 2020-03-10 | 2020-03-10 | Multicore isolated form metallic aluminum sheath is branch fireproof cable in advance |
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| CN211604720U true CN211604720U (en) | 2020-09-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114614433A (en) * | 2022-04-07 | 2022-06-10 | 淮南文峰航天电缆有限公司 | Device suitable for connecting forked cable |
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2020
- 2020-03-10 CN CN202020290024.6U patent/CN211604720U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114614433A (en) * | 2022-04-07 | 2022-06-10 | 淮南文峰航天电缆有限公司 | Device suitable for connecting forked cable |
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