CN108878001B - Manufacturing method of prefabricated branch cable with good waterproof performance - Google Patents
Manufacturing method of prefabricated branch cable with good waterproof performance Download PDFInfo
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- CN108878001B CN108878001B CN201810690741.5A CN201810690741A CN108878001B CN 108878001 B CN108878001 B CN 108878001B CN 201810690741 A CN201810690741 A CN 201810690741A CN 108878001 B CN108878001 B CN 108878001B
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- cable
- branch cable
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- groove
- sheath
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- 238000004519 manufacturing process Methods 0.000 title abstract description 20
- 238000003825 pressing Methods 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 238000004804 winding Methods 0.000 claims abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052802 copper Inorganic materials 0.000 claims abstract description 5
- 239000010949 copper Substances 0.000 claims abstract description 5
- 239000002390 adhesive tape Substances 0.000 claims abstract description 4
- 238000005096 rolling process Methods 0.000 claims description 31
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 8
- 239000010410 layer Substances 0.000 description 44
- 239000004020 conductor Substances 0.000 description 7
- 238000009413 insulation Methods 0.000 description 7
- 239000004800 polyvinyl chloride Substances 0.000 description 6
- 229920000915 polyvinyl chloride Polymers 0.000 description 6
- 229920003020 cross-linked polyethylene Polymers 0.000 description 5
- 239000004703 cross-linked polyethylene Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000004745 nonwoven fabric Substances 0.000 description 4
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1875—Multi-layer sheaths
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/009—Cables with built-in connecting points or with predetermined areas for making deviations
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/2825—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable using a water impermeable sheath
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Abstract
The invention discloses a method for manufacturing a prefabricated branch cable with good waterproof performance, which comprises a main cable and a branch cable with the same structure, wherein the main cable comprises a rubber sheath, an inner sheath layer is wrapped in the rubber sheath, the inner sheath layer is formed by twisting more than three copper wires in a counterclockwise mode, a high-temperature-resistant sheath is wrapped in the inner sheath layer, a buffer layer is filled in the high-temperature-resistant sheath, a cable core is wrapped in the buffer layer, an insulating layer and an outer sheath are sequentially wrapped on the main cable and the branch cable from inside to outside, the branch cable is connected onto the main cable through a C-shaped clamp in a pressing mode, a winding tape is spirally wound clockwise by taking the C-shaped clamp as the center, a layer of waterproof adhesive tape is wound on the winding tape, and a mold cover matched with the main cable and the branch cable is used for sealing and. The invention has simple structure, increases the pressure resistance and the waterproof performance of the cable, can bend the branch cable according to the actual requirement and prevents the branch cable from falling off from the connecting electric appliance after being bent.
Description
Technical Field
The invention relates to the technical field of cable manufacturing methods, in particular to a method for manufacturing a prefabricated branch cable with good waterproof performance.
Background
The pre-branch cable is a complete and continuous cable set prefabricated in a factory, and the conductors of the main cable and the branch cable are connected in a compression mode through copper or copper alloy pipes at the specified position of the main cable and the requirement of the main cable. The main cable and the branch cable are insulated by polyvinyl chloride insulation and crosslinked polyethylene insulation, the sheath materials are basically polyvinyl chloride sheath and polyolefin sheath, and the soaking voltage test or spark test and the insulation resistance test of the branch connector of the finished branch cable are basically specified. Polyvinyl chloride is a thermoplastic material, the working temperature of the polyvinyl chloride is basically 65 ℃ or 70 ℃, the polyvinyl chloride is very easy to absorb water, the insulation resistance of the polyvinyl chloride is reduced rapidly due to the water absorption, the working temperature of the crosslinked polyethylene is improved when the crosslinked polyethylene is used as a thermosetting material, but the crosslinked polyethylene is only 90 ℃, the insulation of a main cable and a branch cable in a connecting body is bound to have an interface, and the crosslinked polyethylene is not suitable for being used in a long-term water immersion, underground or high-humidity environment.
Through retrieval, the Chinese patent application No. CN201110230258.7 discloses a method for manufacturing a prefabricated branch flexible cable, a main cable conductor and a branch cable conductor are respectively and sequentially provided with a main insulating layer, a main outer sheath, a branch insulating layer and a branch outer sheath, talcum powder scattered with a separant and wrapped main non-woven fabrics are coated between the main insulating layer and the main outer sheath, talcum powder scattered with a separant and wrapped branch non-woven fabrics are coated between the branch insulating layer and the branch outer sheath, the main insulating layer, the main outer sheath, the branch insulating layer and the branch outer sheath are respectively stripped at the joint of the main cable conductor and the branch cable conductor, an automatic hydraulic press is selected to use a C-shaped clamp with a convex ridge to press and connect the main cable conductor and the branch cable conductor, after the pressing and connection are finished, a proper mould is selected to carry out mould pressing and injection molding on, and forming a non-woven fabric wrapping layer, molding and molding the outer protective layer of the connector again outside the non-woven fabric wrapping layer, wherein the insulating layer of the connector and the outer protective layer of the connector jointly form a branch cable connector. The method for manufacturing the prefabricated branch flexible cable in the patent has the following defects: in a working environment or a long-term humid environment with the temperature of over 100 ℃, the existing branch cable has an insufficient effect in a water-immersed pressure test or an insulation resistance test.
Disclosure of Invention
The invention aims to solve the problem that the effects of a water immersion pressure resistance test and an insulation resistance test in the prior art are not good enough, and provides a method for manufacturing a prefabricated branch cable with good waterproof performance.
In order to achieve the purpose, the invention adopts the following technical scheme:
a manufacturing method of a prefabricated branch cable with good waterproof performance comprises a main cable and a branch cable which are identical in structure, wherein the main cable comprises a rubber sheath, an inner sheath layer is wrapped in the rubber sheath, the inner sheath layer is formed by twisting more than three copper wires in an anticlockwise mode, a high-temperature-resistant sheath is wrapped in the inner sheath layer, a buffer layer is filled in the high-temperature-resistant sheath, a cable core is wrapped in the buffer layer, an insulating layer and an outer sheath are sequentially wrapped on the main cable and the branch cable from inside to outside, the branch cable is connected to the main cable in a pressing mode through a C-shaped clamp, a winding belt is spirally wound clockwise by taking the C-shaped clamp as the center, a layer of waterproof adhesive tape is wound on the winding belt, and sealing pressing is conducted through a mold cover matched with the main cable and the branch cable.
Preferably, one side of the die cover, which is close to the trunk cable, is connected with a supporting block, one side of the supporting block, which is far away from the die cover, is connected with a supporting frame, a fixed pulley is hinged between the supporting frames through a movable shaft, a through hole is arranged on the supporting block, one end of the branch cable, far away from the die cover, penetrates through the through hole and is wound on the fixed pulley, and extends outwards, the branch cable is fixedly connected with the place where the branch cable is firstly wound and contacted with the fixed pulley, a plurality of positioning grooves are uniformly and equidistantly arranged on the annular side wall of the fixed pulley, the positioning grooves are provided with openings far away from the corresponding groove wall on the annular side wall of the fixed pulley, the opening is arranged to penetrate through the fixed pulley, a clamping groove is arranged on one side of the supporting block close to the fixed pulley, a spring is fixedly connected to the bottom of the clamping groove, the other end of the spring is fixedly connected with a positioning block, and one end, far away from the spring, of the positioning block penetrates through the notch of the clamping groove and extends outwards to one of the corresponding positioning grooves.
Preferably, rolling grooves are symmetrically formed in the hole wall of the through hole, rolling balls are arranged in the rolling grooves, one ends, far away from the bottoms of the rolling grooves, of the rolling balls penetrate through the notches of the rolling grooves and extend outwards, and the rolling balls are in rolling connection with the side walls of the branch cables.
Preferably, the corresponding groove wall of the clamping groove is symmetrically provided with sliding grooves, each sliding groove is internally and slidably connected with a sliding block, and one side of each sliding block, which is close to the positioning block, is jointly and fixedly connected to the corresponding side wall of the positioning block.
Preferably, the bottom of the positioning groove is fixedly connected with an iron sheet, and one end of the positioning block, far away from the spring, is fixedly connected with a magnet.
Preferably, the side wall of the positioning block close to one end of the magnet is provided with a digging groove.
Preferably, the ball has a ball diameter larger than a groove diameter of the rolling groove opening.
Compared with the prior art, the invention provides the manufacturing method of the prefabricated branch cable with good waterproof performance, and the manufacturing method has the following beneficial effects:
1. according to the manufacturing method of the prefabricated branch cable with good waterproof performance, the rubber sheath, the inner armour layer, the high-temperature-resistant sheath, the buffer layer, the cable core, the insulating layer and the outer sheath are arranged, the pressure resistance of the cable is improved through the outer sheath, the inner armour layer and the buffer layer, when an external force acts on the cable, the cable is protected through the outer sheath, the inner armour layer and the buffer layer, the cable is subjected to sealing and water-resisting treatment through the rubber sheath and the insulating layer, and good waterproof performance is provided for the cable.
2. This prefabricated branch cable manufacturing method that waterproof performance is good, through setting up the fixed pulley, the constant head tank, the draw-in groove, spring and locating piece, when the branch cable needs crooked, it drives the branch cable crooked to appointed angle to rotate the fixed pulley, the locating piece is in a constant head tank that corresponds under the spring action of spring, fixed the position of fixed pulley, and then fixed the crooked angle of branch cable, be convenient for according to the crooked branch cable of actual need, prevent to take place to drop from connecting electrical apparatus under self arbitrariness behind the branch cable bending, lead to the loss in the life production.
The device has the advantages that the structure is simple, the pressure resistance and the waterproof performance of the cable are improved, the branch cable can be bent according to actual requirements, and the branch cable is prevented from falling off from a connecting electric appliance under the self-resilience after being bent, so that loss in life and production is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a method for manufacturing a prefabricated branch cable with good waterproof performance according to the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is an enlarged view of portion B of FIG. 1;
fig. 4 is a cross-sectional view of a main cable of the method for manufacturing a prefabricated branch cable with good waterproof performance.
In the figure: the cable comprises a main cable 1, a branch cable 2, a rubber sheath 3, an inner cable layer 4, a high-temperature-resistant sheath 5, a buffer layer 6, a cable core 7, a C-shaped clamp 8, a mold cover 9, a supporting block 10, a supporting frame 11, a fixed pulley 12, a through hole 13, a positioning groove 14, a clamping groove 15, a spring 16, a positioning block 17, a rolling groove 18, a ball 19, a sliding groove 20, a sliding block 21, an iron sheet 22, a magnet 23, a groove 24, an insulating layer 25 and an outer sheath 26.
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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-4, a method for manufacturing a prefabricated branch cable with good waterproof performance comprises a main cable 1 and a branch cable 2 which are identical in structure, wherein the main cable 1 comprises a rubber sheath 3, an inner sheath layer 4 is wrapped in the rubber sheath 3, the inner sheath layer 4 is formed by twisting more than three copper wires in a counterclockwise mode, a high-temperature-resistant sheath 5 is wrapped in the inner sheath layer 4, a buffer layer 6 is filled in the high-temperature-resistant sheath 5, a cable core 7 is wrapped in the buffer layer 6, an insulating layer 25 and an outer sheath 26 are sequentially wrapped on the main cable 1 and the branch cable 2 from inside to outside, the branch cable 2 is pressed on the main cable 1 through a C-shaped clamp 8, a clockwise spirally wrapped tape is wound by taking the C-shaped clamp 8 as a center, a layer of waterproof adhesive tape is wound on the wrapped tape, a mold cover 9 matched with the main cable 1 and the branch cable 2 is used for sealing and pressing, and the outer sheath 26, The inner armour layer 4 and the buffer layer 6 increase the pressure resistance of the cable, when external force acts on the cable, the cable is protected through the outer sheath 26, the inner armour layer 4 and the buffer layer 6, the cable is subjected to sealing and water resisting treatment through the rubber sheath 3 and the insulating layer 25, and good waterproof performance is provided for the cable.
One side of the die cover 9 close to the trunk cable 2 is connected with a supporting block 10, one side of the supporting block 10 far away from the die cover 9 is connected with a supporting frame 11, a fixed pulley 12 is hinged between the supporting frames 11 through a movable shaft, a through hole 13 is formed in the supporting block 10, one end of the trunk cable 2 far away from the die cover 9 penetrates through the through hole 13 and is wound on the fixed pulley 12 and extends outwards, the trunk cable 2 is fixedly connected with the position where the fixed pulley 12 is firstly wound and contacted, a plurality of positioning grooves 14 are uniformly and equidistantly formed in the annular side wall of the fixed pulley 12, openings are formed in the corresponding groove walls of the annular side wall of the fixed pulley 12, the openings penetrate through the fixed pulley 12, one side of the supporting block 10 close to the fixed pulley 12 is provided with a clamping groove 15, a spring 16 is fixedly connected to the groove bottom of the clamping groove 15, a positioning block 17 is fixedly connected to the other end of the spring 16, one end of the positioning, when the branch trunk cable needs to be bent, the fixed pulley 14 is rotated to drive the branch trunk cable to be bent to a specified angle, the positioning block 17 is bounced to a corresponding positioning groove 14 under the elastic force action of the spring 16, the position of the fixed pulley 12 is fixed, and then the bent angle of the branch trunk cable 2 is fixed, so that the branch trunk cable 2 can be bent according to actual needs, and the branch trunk cable 2 is prevented from falling off from a connecting electric appliance under the self-flexibility after the branch trunk cable 2 is bent, and the loss in life production is caused.
The wall of the through hole 13 is symmetrically provided with rolling grooves 18, rolling balls 19 are arranged in the rolling grooves 18, one ends, far away from the bottoms of the rolling grooves 18, of the rolling balls 19 penetrate through notches of the rolling grooves 18 and extend outwards, the rolling balls 19 are in rolling connection with the side walls of the branch cables 2, and the small branch cables 2 enter losses caused by friction in the through hole 13 through rolling between the rolling balls 19 and the branch cables 2.
The corresponding groove wall of the clamping groove 15 is symmetrically provided with sliding grooves 20, the sliding grooves 20 are internally and slidably connected with a sliding block 21, one side of each of the two sliding blocks 21 close to the positioning block 17 is fixedly connected to the corresponding side wall of the positioning block 17, the positioning block 17 is driven to move in the sliding grooves 20 when moving, and when the sliding block 21 moves to the end of the sliding groove 20 and stops moving, the positioning block 17 also stops moving along with the sliding block, so that the positioning block 17 is prevented from being ejected out of the clamping groove 15 by the spring 16.
The slot bottom fixedly connected with iron sheet 22 of constant head tank 14, the one end fixedly connected with magnet 23 of locating piece 17 far away from spring 16, when the locating piece 17 bounces into constant head tank 14, iron sheet 22 and magnet 23 adsorb together, increase the stability of locating piece 17 in constant head tank 14.
The side wall of the positioning block 17 close to one end of the magnet 23 is provided with a digging groove 24, and the digging groove 24 is digging to drive the positioning block 17 in the positioning groove 14 to move.
The ball 19 has a larger spherical diameter than the groove diameter of the notch of the rolling groove 18, preventing the ball 19 from slipping out of the rolling groove 18.
According to the invention, the pressure resistance of the cable is increased through the outer sheath 26, the inner cable layer 4 and the buffer layer 6, when an external force acts on the cable, the cable is protected through the outer sheath 26, the inner cable layer 4 and the buffer layer 6, and the cable is subjected to sealing and water-resisting treatment through the rubber sheath 3 and the insulating layer 25, so that a good waterproof performance is provided for the cable; when the branch trunk cable needs to be bent, the fixed pulley 14 is rotated to drive the branch trunk cable to be bent to a specified angle, the positioning block 17 is bounced to a corresponding positioning groove 14 under the elastic force action of the spring 16, the position of the fixed pulley 12 is fixed, and then the bent angle of the branch trunk cable 2 is fixed, so that the branch trunk cable 2 can be bent according to actual needs, and the branch trunk cable 2 is prevented from falling off from a connecting electric appliance under the self-flexibility after the branch trunk cable 2 is bent, and the loss in life production is caused.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (1)
1. A prefabricated branch cable with good waterproof performance comprises a main cable (1) and a branch cable (2) which are identical in structure, and is characterized in that the main cable (1) comprises a rubber sheath (3), an inner sheath layer (4) is wrapped in the rubber sheath (3), the inner sheath layer (4) is formed by twisting more than three copper wires in an anticlockwise mode, a high-temperature-resistant sheath (5) is wrapped in the inner sheath layer (4), a buffer layer (6) is filled in the high-temperature-resistant sheath (5), a cable core (7) is wrapped in the buffer layer (6), an insulating layer (25) and an outer sheath (26) are sequentially wrapped in the main cable (1) and the branch cable (2) from inside to outside, the branch cable (2) is pressed on the main cable (1) through a C-shaped clamp (8), and a clockwise spiral winding tape is wound by taking the C-shaped clamp (8) as a center, winding a layer of waterproof adhesive tape on the wrapping tape, and sealing and pressing the wrapping tape by using a mold cover (9) matched with the main cable (1) and the branch cable (2);
one side of the die cover (9) close to the branch cable (2) is connected with a supporting block (10), one side of the supporting block (10) far away from the die cover (9) is connected with a supporting frame (11), a fixed pulley (12) is hinged between the supporting frames (11) through a movable shaft, a through hole (13) is formed in the supporting block (10), one end of the branch cable (2) far away from the die cover (9) penetrates through the through hole (13) and is wound on the fixed pulley (12) and extends outwards, the branch cable (2) is fixedly connected with the place where the fixed pulley (12) is firstly wound and contacted, a plurality of positioning grooves (14) are uniformly and equidistantly formed in the annular side wall of the fixed pulley (12), the corresponding groove wall of the positioning groove (14) far away from the annular side wall of the fixed pulley (12) is provided with an opening, the opening penetrates through the fixed pulley (12), one side of the supporting block (10) close to the fixed pulley (12) is, a spring (16) is fixedly connected to the bottom of the clamping groove (15), a positioning block (17) is fixedly connected to the other end of the spring (16), and one end, far away from the spring (16), of the positioning block (17) penetrates through a notch of the clamping groove (15) and extends outwards to one corresponding positioning groove (14);
rolling grooves (18) are symmetrically formed in the wall of the through hole (13), rolling balls (19) are arranged in the rolling grooves (18), one end, far away from the bottom of the rolling grooves (18), of each rolling ball (19) penetrates through the notch of each rolling groove (18) and extends outwards, and the rolling balls (19) are connected with the side wall of the trunk cable (2) in a rolling mode;
sliding chutes (20) are symmetrically formed in corresponding groove walls of the clamping groove (15), a sliding block (21) is connected in the sliding chute (20) in a sliding mode, and one sides, close to the positioning block (17), of the two sliding blocks (21) are fixedly connected to corresponding side walls of the positioning block (17) together;
an iron sheet (22) is fixedly connected to the bottom of the positioning groove (14), and a magnet (23) is fixedly connected to one end, far away from the spring (16), of the positioning block (17);
a digging groove (24) is formed in the side wall of the positioning block (17) close to one end of the magnet (23);
the ball diameter of the ball (19) is larger than the groove diameter of the notch of the rolling groove (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810690741.5A CN108878001B (en) | 2018-06-28 | 2018-06-28 | Manufacturing method of prefabricated branch cable with good waterproof performance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810690741.5A CN108878001B (en) | 2018-06-28 | 2018-06-28 | Manufacturing method of prefabricated branch cable with good waterproof performance |
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| CN108878001A CN108878001A (en) | 2018-11-23 |
| CN108878001B true CN108878001B (en) | 2020-01-10 |
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| CN109980414A (en) * | 2019-03-25 | 2019-07-05 | 浙江创格科技有限公司 | A kind of engine wiring harness with integral type rubber protecting jacket |
| CN110364311A (en) * | 2019-05-28 | 2019-10-22 | 白银有色长通电线电缆有限责任公司 | A kind of pre-branched cable connector end blocks water operating method |
| CN112466580B (en) * | 2020-11-17 | 2022-08-19 | 安徽电缆股份有限公司 | Copper single line layer yarn unwrapping wire and filling equipment that blocks water |
| CN112366649B (en) * | 2020-12-01 | 2022-04-12 | 安徽徽宁电器仪表集团有限公司 | High-airtight pre-branch cable |
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| JP5412823B2 (en) * | 2008-12-16 | 2014-02-12 | Ｊｆｅスチール株式会社 | Heat and water resistant electric wire for coke moving machine |
| CN103247390B (en) * | 2013-04-15 | 2016-08-31 | 航天电工集团有限公司 | A kind of pre-branch flexible mineral compound insulation fireproof cable and preparation method thereof |
| CN107945927A (en) * | 2017-11-26 | 2018-04-20 | 王国友 | Prefabricated branch cable |
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