CN108899860B - Fireproof cable branch box - Google Patents
Fireproof cable branch box Download PDFInfo
- Publication number
- CN108899860B CN108899860B CN201811024575.1A CN201811024575A CN108899860B CN 108899860 B CN108899860 B CN 108899860B CN 201811024575 A CN201811024575 A CN 201811024575A CN 108899860 B CN108899860 B CN 108899860B
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- CN
- China
- Prior art keywords
- box
- pressing plate
- cable
- line pressing
- groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000009413 insulation Methods 0.000 claims abstract description 23
- 230000001681 protective effect Effects 0.000 claims abstract description 19
- 239000011241 protective layer Substances 0.000 claims abstract description 19
- 239000010410 layer Substances 0.000 claims description 13
- 230000009970 fire resistant effect Effects 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229920001342 Bakelite® Polymers 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000004637 bakelite Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/10—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes
- H02G15/16—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes structurally associated with support for line-connecting terminals within the box
Landscapes
- Connection Or Junction Boxes (AREA)
- Cable Accessories (AREA)
Abstract
The invention relates to the field of power equipment, in particular to a fireproof cable branch box, which comprises an outer protection box, an insulation box positioned in the outer protection box and a conductive pressing plate positioned in the insulation box, wherein the conductive pressing plate comprises a double-line pressing plate, a main line pressing plate and a voltage dividing plate; the insulating box comprises an upper insulating box and a lower insulating box, a cavity for accommodating the conductive pressing plate is formed inside the upper insulating box and the lower insulating box after being combined, and the insulating box is provided with a tubular structure pressed on the middle protective layer, so that the insulating box isolates the outer protective box and the conductive pressing plate. The branch box assembly is convenient to connect electricity and has reliable anti-creeping and anti-damage performances.
Description
Technical Field
The invention relates to the field of power equipment, in particular to a cable branching device used at a circuit bus tapping node.
Background
In recent years, with the emphasis of building fire protection related requirements, it has been explicitly proposed in design specifications that fire protection cables need to be used for building fire protection circuits.
Under the premise, a fireproof cable branch box appears in the market, the principle of the fireproof cable branch box is the same as that of a C-type pressurizing method, an iron box body with the similar fire emergency box size is adopted as a protective shell, and the connecting method has potential safety hazards and is huge in size, so that the installation is quite difficult.
Disclosure of Invention
In order to solve the problems, the invention provides the fireproof cable branch box, which has the function of cable branching and has the advantages of good insulating property, good protective property, compaction and anti-creeping of a cable joint of a structure assembly and the like.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the fireproof cable branch box comprises a conductive core, a middle protective layer and an outer protective layer, and comprises an outer protective box, an insulating box positioned in the outer protective box and a conductive pressing plate positioned in the insulating box, wherein the conductive pressing plate is positioned in the insulating box
The conductive pressing plate comprises a double-line pressing plate, a main pressing plate and a voltage dividing plate, wherein the double-line pressing plate comprises a semicircular main pressing line groove and at least one semicircular voltage dividing line groove, the main pressing plate and the voltage dividing plate are respectively provided with semicircular pressing line grooves, the pressing line grooves of the main pressing plate and the main pressing line grooves of the double-line pressing plate are assembled to form a tubular structure for clamping a conductive core of a main cable, and the pressing line grooves of the voltage dividing plate and the voltage dividing line grooves of the double-line pressing plate form a tubular structure for accommodating the conductive core of the branch cable;
the insulating box comprises an upper insulating box and a lower insulating box, a cavity for accommodating the conductive pressing plate is formed inside the upper insulating box and the lower insulating box after being combined, and the insulating box is provided with a tubular structure pressed on the middle protective layer, so that the insulating box isolates the outer protective box and the conductive pressing plate.
Preferably, the inner wall of the tubular structure of the insulation box is provided with an annular protrusion, and the inner annular wall of the annular protrusion is pressed on the conductive core to limit the cable to move in the cable axis direction in the insulation box.
Preferably, the outer protective case comprises an upper case and a lower case, wherein a cavity for accommodating the insulating case is formed inside the upper case and the lower case after being combined, and the outer protective case has a tubular structure pressed on the middle protective layer.
Preferably, one of the upper and lower shells is provided with two symmetrically arranged positioning posts, and the other of the two shells is provided with a positioning groove matched with the positioning posts for use.
Preferably, the end of the outer protective layer abuts against the side wall of the outer protective box, so as to limit the cable to move along the axis direction.
Preferably, the main line pressing plate and the line dividing plate are fixedly connected with the double line pressing plate through screws and nuts at four corners.
Preferably, the cross-sectional area of the duplex line pressing plate is not smaller than the cross-sectional area of the conductive core of the branch cable.
Preferably, the double-line pressing plate, the main line pressing plate and the line dividing plate are all tin-plated copper-clad plates.
Preferably, the slotting width of the main wire-dividing slot is larger than that of the wire-dividing slot.
Preferably, the outer protection box is made of cast aluminum, and the insulation box is made of bakelite.
The beneficial effects of using the invention are as follows:
the branch box assembly realizes branching on the cable through the three-layer structure, wherein the inner layer structure enables the electric connection of the main cable and the branch cable to be reliable and stable through the structure of the line pressing plate. The insulating box of the middle layer adopts an upper half box and lower half box opposite-mounting structure, thereby playing an insulating role; the outer protection box adopts half box to the dress formula structure for add the metal protection layer at insulating layer outward circle, make this branch box assembly connect the electricity promptly convenient, have reliable anticreep, anti-damage performance again.
The annular step structure is adopted in the middle of the tubular structure of the insulating box, so that the inner wall of the tubular structure and the inner wall of the annular step structure are respectively clamped on different layers of the cable, and meanwhile, the outer protective layer of the cable is abutted against the side wall of the outer protective box, so that the cable is limited to move at the total cost of the branch box by the double structure of radial extrusion and axial limiting, and the branch box assembly is safer and more reliable.
Drawings
Fig. 1 is a schematic side view in partial cross section of a fire-resistant cable breakout box according to the invention.
Fig. 2 is a schematic perspective view of the fire-proof cable branching box of the present invention.
Fig. 3 is a schematic diagram of a side perspective view of the fire-resistant cable junction box of the present invention.
Fig. 4 is a schematic top perspective view of the fire-resistant cable breakout box of the present invention.
Fig. 5 is a schematic structural view of a duplex line pressing plate in the fireproof cable branching box assembly of the present invention.
The reference numerals include:
1-lower shell, 2-upper shell, 3-upper insulation box, 4-lower insulation box, 5-duplex line pressing plate, 6-main line pressing plate, 7-voltage dividing line pressing plate, 8-first screw, 9-nut, 10-second screw, 11-third screw and 12-positioning column;
51-main body plates, 52-main wire pressing grooves, 53-wire pressing grooves and 54-through holes; s1-a conductive core; s2-an intermediate protective layer; s3-an outer protective layer, K1-annular protrusions and K2-plate column structures.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 5, the present embodiment provides a fire-proof cable branching box, the cable includes a conductive core S1, a middle protective layer S2 and an outer protective layer S3, the fire-proof cable branching box includes an outer protective box, an insulating box located in the outer protective box, and a conductive pressing plate located in the insulating box, wherein the conductive pressing plate includes a duplex pressing plate 5, a main pressing plate 6 and a voltage dividing plate 7. The double-line pressing plate 5 comprises a semicircular main line pressing groove 52 and at least one semicircular voltage dividing groove 53, the main line pressing plate 6 and the voltage dividing groove 7 are provided with semicircular line pressing grooves, the line pressing groove of the main line pressing plate 6 and the main line pressing groove 52 are assembled to form a tubular structure for clamping the conductive core S1 of the main cable, and the line pressing groove of the voltage dividing groove 7 and the voltage dividing groove 53 form a tubular structure for accommodating the conductive core S1 of the branch cable; the insulating box comprises an upper insulating box 3 and a lower insulating box 4, a cavity for accommodating the conductive pressing plate is formed inside the upper insulating box 3 and the lower insulating box 4 after being combined, and the insulating box is provided with a tubular structure pressed on the middle protective layer S2, so that the insulating box isolates the outer protective box and the conductive pressing plate. The outer protection box comprises an upper shell 2 and a lower shell 1, a cavity for accommodating the insulation box is formed inside the upper shell 2 and the lower shell 1 after being combined, and the outer protection box is provided with a tubular structure pressed on the middle protection layer S2.
Specifically, as shown in fig. 1, the upper casing 2 and the lower casing 1 adopt a cast aluminum molding process, the upper casing 2 and the lower casing 1 are integrally in a mirror image design, after the upper casing 2 and the lower casing 1 are assembled, four corners of the upper casing 2 and the lower casing 1 are locked by third screws 11, so that a firm rectangular box-shaped structure which is not easy to contact is formed inside the outer protection box, two tubular structures can be seen to be arranged on the side surface of the outer protection box, cables are respectively arranged on the two tubular structures, the tubular structures with larger diameters are used for installing main cables, and the tubular structures with smaller diameters are used for installing branch cables.
As shown in fig. 2, the upper casing 2 and the lower casing 1 are internally wrapped with the upper insulating box 3 and the lower insulating box 4, the parting surfaces of the upper insulating box 3 and the lower insulating box 4 are in the same plane with the parting surfaces of the upper casing 2 and the lower casing 1, and the parting surfaces of the duplex line pressing plate 5, the main line pressing plate 6 and the split line pressing plate 7 are also in the plane. While the upper and lower insulating cases 3 and 4 and the tubular structures and the upper and lower cases 2 and 1 of the upper and lower cases 2 and 1 are opposed one by one.
The inner wall of the tubular structure of the insulating box has an annular protrusion K1, and the inner annular wall of the annular protrusion K1 is pressed against the conductive core S1 to restrict the cable from moving in the cable axial direction within the insulating box. In this embodiment, the annular protrusion K1 is clamped between the end of the middle protective layer S2 and the wire pressing plate, so that the insulator is fixed at the position of the insulator, and leakage caused by the movement of the conductive core S1 is avoided.
The parts of the duplex line pressing plate 5, the main line pressing plate 6 and the branch line pressing plate 7 can be seen, the duplex line pressing plate 5, the main line pressing plate 6 and the branch line pressing plate 7 are connected with each other in a locking mode through the cooperation of the first screw 8 and the nut 9, so that the locking structure is more reliable, and the reliability of power connection is enhanced.
As shown in fig. 3, the column structure K2 of the board is to be positioned in the middle of the insulating box, that is, the upper insulating box 3 and the lower insulating box 4 are provided with column bodies in the middle, and the column bodies are oppositely clamped at two sides of the line pressing board.
As shown in fig. 4, in the present figure, the distribution of the main cable and the branch cable, and the pressing of the conductive core S1 by the duplex wire pressing plate 5, the main wire pressing plate 6, and the branch wire pressing plate 7 can be seen.
Specifically, the middle protective layer S2 and the outer protective layer S3 are pulled out on a section of the main cable, the conductive core S1 is leaked, the conductive core S1 of the main cable is placed in the main wire groove 52 of the duplex wire pressing plate 5, correspondingly, the conductive core S1 of the branch cable is placed in the wire dividing groove 53 of the duplex wire pressing plate 5, then the main wire pressing plate 6 and the voltage dividing plate 7 are respectively and correspondingly buckled at corresponding positions, then the duplex wire pressing plate 5, the main wire pressing plate 6 and the voltage dividing plate 7 are respectively fixed through the first screw 8 and the nut 9, then the insulation box is buckled outside the wire pressing plate, the upper insulation box 3 and the lower insulation box 4 are fixed through the second screw 10, finally the outer protective shell is sleeved outside the insulation box, and the lower shell 1 and the upper shell 2 are fixed through the third screw 11, so that the installation of the cable dividing box assembly is finally realized.
The branch box assembly realizes branching on the cable through the three-layer structure, wherein the inner layer structure enables the electric connection of the main cable and the branch cable to be reliable and stable through the structure of the line pressing plate. The insulating box of the middle layer adopts an upper half box and lower half box opposite-mounting structure, thereby playing an insulating role; the outer protective box adopts half box to the dress formula structure for add the metal inoxidizing coating outside the insulating layer, make this branch box assembly connect the electricity promptly convenient, have reliable anticreep, anti-damage performance again.
One of the upper housing 2 and the lower housing 1 has two symmetrically arranged positioning posts 12, and the other of the upper housing 2 and the lower housing 1 has positioning grooves for cooperating with the positioning posts 12. The lower housing 1 and the upper housing 2 are assembled more easily by the cooperation of the positioning posts 12 and the positioning grooves.
The end part of the outer protective layer S3 is abutted against the side wall of the outer protective box, so that the cable is further prevented from moving in the split box assembly.
The main line pressing plate 6 and the line dividing plate 7 are fixedly connected with the double line pressing plate 5 through the first screws 8 and the nuts 9 at four corners, and are fixedly connected, compact in structure and reliable in power connection.
The cross section area of the duplex line pressing plate 5 is not smaller than the cross section area of the conductor of the conductive core S1 of the branch cable, so that current conduction is not limited by the line pressing plate.
The duplex line ball board 5, main line ball board 6 and divide line ball board 7 are tin-plated copper plate, in other embodiments, conductors that conductivity properties such as copper are good can be adopted to duplex line ball board 5, main line ball board 6 and divide line ball board 7.
As shown in fig. 5, the grooving width of the main wire dividing groove 52 is larger than that of the wire dividing groove 53. Taking the double-line-pressing plate 5 as an example, the main body plate 51 of the double-line-pressing plate 5 is of a flat plate structure, the main line-pressing groove 52 and the voltage-dividing groove 53 are semicircular grooves, and the main line-pressing groove 52 and the voltage-dividing groove 53 are arranged in parallel, so that on one hand, the function of prompting assembly is achieved, and on the other hand, the function of adapting to the cable size is achieved. The duplex pressing line plate 5 is provided with 8 through holes 54.
The outer protection box is cast aluminum material, and the insulating box is bakelite material.
The annular stepped structure (annular bulge K1) is adopted in the middle of the tubular structure of the insulating box, so that the inner wall of the tubular structure and the inner wall of the annular stepped structure are respectively clamped on different layers of the cable, meanwhile, the outer protective layer S3 of the cable is abutted against the side wall of the outer protective box, and the cable is limited to move at the total cost of the branch box by the double structure of equal radial extrusion and axial limiting, so that the branch box assembly is safer and more reliable.
The foregoing is merely exemplary of the present invention, and many variations may be made in the specific embodiments and application scope of the invention by those skilled in the art based on the spirit of the invention, as long as the variations do not depart from the gist of the invention.
Claims (8)
1. Fireproof cable branch box, the cable includes conductive core, middle inoxidizing coating and outer inoxidizing coating, its characterized in that: the fireproof cable branch box comprises an outer protection box, an insulation box positioned in the outer protection box and a conductive pressing plate positioned in the insulation box, wherein
The conductive pressing plate comprises a double-line pressing plate, a main line pressing plate and a voltage dividing plate, wherein the double-line pressing plate comprises a semicircular main line pressing groove and at least one semicircular voltage dividing groove, the main line pressing plate and the voltage dividing plate are respectively provided with semicircular line pressing grooves, the main line pressing groove of the double-line pressing plate and the line pressing groove of the main line pressing plate are assembled to form a tubular structure for clamping a conductive core of a main cable, and the voltage dividing groove of the double-line pressing plate and the voltage dividing groove of the voltage dividing plate form a tubular structure for accommodating the conductive core of the branch cable;
the insulation box comprises an upper insulation box and a lower insulation box, a cavity for accommodating the conductive pressing plate is formed inside the upper insulation box and the lower insulation box after being combined, and the insulation box is provided with a tubular structure for pressing the middle protective layer of the cable, so that the insulation box isolates the outer protective box from the conductive pressing plate;
the inner wall of the tubular structure of the insulating box is provided with an annular bulge, and the inner annular wall of the annular bulge is pressed on the conductive core so as to limit the cable to move in the insulating box along the axial direction of the cable;
the end part of the cable outer protective layer is abutted against the side wall of the outer protective box.
2. The fire resistant cable breakout box according to claim 1, wherein: the outer protection box comprises an upper shell and a lower shell, a cavity for accommodating the insulation box is formed inside the upper shell and the lower shell after being combined, and the outer protection box is provided with a tubular structure pressed on the middle protection layer.
3. The fire resistant cable breakout box according to claim 2, wherein: one of the upper shell and the lower shell is provided with two symmetrically arranged positioning columns, and the other one of the upper shell and the lower shell is provided with a positioning groove matched with the positioning columns.
4. The fire resistant cable breakout box according to claim 1, wherein: the main line pressing plate and the line dividing plate are fixedly connected with the double line pressing plate through screws and nuts at four corners.
5. The fire resistant cable breakout box according to claim 1, wherein: the cross section area of the double-connection line pressing plate is not smaller than the cross section area of the conductive core of the branch cable.
6. The fire resistant cable breakout box according to claim 1, wherein: the duplex line ball board, main line ball board and divide line ball board all to be the tin-plated red copper.
7. The fire resistant cable breakout box according to claim 1, wherein: the slotting width of the main wire pressing groove is larger than that of the wire pressing groove.
8. The fire resistant cable breakout box according to claim 1, wherein: the outer protection box is made of cast aluminum, and the insulation box is made of bakelite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811024575.1A CN108899860B (en) | 2018-09-04 | 2018-09-04 | Fireproof cable branch box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811024575.1A CN108899860B (en) | 2018-09-04 | 2018-09-04 | Fireproof cable branch box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108899860A CN108899860A (en) | 2018-11-27 |
| CN108899860B true CN108899860B (en) | 2024-03-29 |
Family
ID=64359660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811024575.1A Active CN108899860B (en) | 2018-09-04 | 2018-09-04 | Fireproof cable branch box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108899860B (en) |
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|---|---|---|---|---|
| CN1161763A (en) * | 1994-10-25 | 1997-10-08 | 雷伊化学公司 | Connector for elongate cable |
| CN203352080U (en) * | 2013-06-20 | 2013-12-18 | 沈阳市艾克电缆厂 | Cable splitter |
| CN103944135A (en) * | 2014-03-31 | 2014-07-23 | 天津腾盛海洋工程有限公司 | Stabilizing waterproof structure for taking up and paying off cables of electric submersible pump |
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| GB201611985D0 (en) * | 2016-07-11 | 2016-08-24 | Phoenix Mecano S E Asia Pte Ltd | Gas tight instrument junction box |
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| CN208581049U (en) * | 2018-09-04 | 2019-03-05 | 沈阳伊思特机器人自动化科技有限公司 | Fireproof cable dividing box |
Family Cites Families (2)
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| US6736715B2 (en) * | 2000-03-03 | 2004-05-18 | Rorey Kuhn | Electrical junction assembly and related splicing method |
| US10418748B2 (en) * | 2017-02-24 | 2019-09-17 | Nvent Services Gmbh | Fire-rated three-way splice assembly |
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Also Published As
| Publication number | Publication date |
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| CN108899860A (en) | 2018-11-27 |
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Effective date of registration: 20240305 Address after: 110000 no.8-4, pump valve 4th Street, pump valve industrial park, yangshigang Town, Liaozhong District, Shenyang City, Liaoning Province Applicant after: Shenyang North Aike Cable Co.,Ltd. Country or region after: China Address before: 110000 Liaobei community, Liaozhong District, Shenyang, Liaoning, 620-3, 620-3 Applicant before: SHENYANG YISITE ROBOT AUTOMATION TECHNOLOGY Co.,Ltd. Country or region before: China |
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