CN113161072B - Manufacturing method of pre-branch cable - Google Patents
Manufacturing method of pre-branch cable Download PDFInfo
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- CN113161072B CN113161072B CN202110424640.5A CN202110424640A CN113161072B CN 113161072 B CN113161072 B CN 113161072B CN 202110424640 A CN202110424640 A CN 202110424640A CN 113161072 B CN113161072 B CN 113161072B
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- aluminum alloy
- cable
- branch
- branch cable
- main cable
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- 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
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- 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
- H01B13/06—Insulating conductors or cables
- H01B13/18—Applying discontinuous insulation, e.g. discs, beads
-
- 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
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
-
- 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 relates to the technical field of cable preparation, and discloses a manufacturing method of a pre-branched cable, which comprises the following steps: the method comprises the following steps: manufacturing a main cable and a branch cable through drawing, stranding and coating processes; step two: stripping off the insulation part of the connecting position of the main cable and the branch cable which are prepared in the step one, and fixedly crimping the main cable and the branch cable through a special wire clamp and equipment; step three: the polyethylene raw material is put into injection molding equipment, the injection molding equipment injects the molten polyethylene raw material into a special mold, and two insulation shields are formed through cooling and solidification, so that wire clamping grooves matched with the main cable and the branch cables are reserved on the surfaces of the two insulation shields. The manufacturing method of the pre-branch cable can quickly dissipate heat at the joint of the main cable and the branch cable in time, prevent disconnection caused by overheating, and increase the stability of the joint of the main cable and the branch cable.
Description
Technical Field
The invention relates to the technical field of cable preparation, in particular to a manufacturing method of a pre-branch cable.
Background
The prefabricated branch cable is a cable for prefabricating a branch line according to a user design drawing when a main cable is produced by a factory, and is a new technical product in recent years.
At present, after a main cable and a branch cable of a prefabricated branch cable are connected by a crimping method, a protective sleeve is generally formed at a joint in an injection molding mode to protect the joint of the main cable and the branch cable, but in the actual using process, because the contact resistance at the joint is difficult to control, the temperature rise of a contact is large, the heat at the joint cannot be timely dissipated due to the additionally arranged protective sleeve, the disconnection phenomenon is easily caused by overheat temperature, and the electric power safety is not facilitated.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a manufacturing method of a pre-branch cable, which has the advantages of timely and quickly dissipating heat at the joint of a main cable and a branch cable, preventing disconnection caused by overheating, improving the stability of the joint of the main cable and the branch cable and the like, and solves the problems that the connection of the main cable and the branch cable is unstable due to the fact that the contact resistance at the joint is difficult to control, the temperature rise of a contact point is large, the heat at the joint cannot be timely dissipated due to the additionally arranged protective sleeve, the disconnection phenomenon is easily caused by overheating temperature, the electric power safety is not facilitated, the tensile strength and the bending resistance of the protective sleeve through injection molding are poor, and the connection of the main cable and the branch cable is influenced due to the fact that the tensile force or the repeated bending when the branch cable is laid.
(II) technical scheme
In order to realize the purposes of quickly dissipating heat at the joint of the main cable and the branch cable in time, preventing disconnection caused by overheating and improving the stability of the joint of the main cable and the branch cable, the invention provides the following technical scheme: a method of making a pre-branch cable, comprising the steps of:
the method comprises the following steps: manufacturing a main cable and a branch cable through drawing, stranding and coating processes;
step two: stripping off the insulation part of the connecting position of the main cable and the branch cable which are prepared in the step one, and fixedly crimping the main cable and the branch cable through a special wire clamp and equipment;
step three: putting polyethylene raw materials into injection molding equipment, injecting the molten polyethylene raw materials into a special mold by the injection molding equipment, cooling and solidifying to form two insulating shields, reserving wire clamping grooves matched with a main cable and a branch cable on the surfaces of the two insulating shields, and reserving a plurality of plug holes on the surfaces of the two insulating shields;
step four: clamping the two insulation shields obtained in the step three with the main cable and the branch cable, inserting aluminum alloy heat conducting rods with proper diameters at the inserting holes of the two insulation shields, melting the joints of the two insulation shields and the aluminum alloy heat conducting rods into a whole through heating equipment, and cooling and solidifying to enable the two insulation shields to enclose a closed space;
step five: injecting heat-conducting glue solution into a closed space formed by enclosing the two insulation shields in the fourth step through injection equipment, so that the heat-conducting glue solution is filled in the insulation shields and is solidified;
step six: casting two aluminum alloy shells meeting the insulation shield in the third step by using a certain amount of aluminum alloy raw materials through casting equipment, wherein semicircular wire grooves matched with the main cable and the branch cables and circular holes matched with the aluminum alloy heat conducting rods in the fourth step are reserved on the two aluminum alloy shells;
step seven: and C, mutually clamping the two aluminum alloy shells obtained in the step six with the main cable and the branch cable, enabling the aluminum alloy heat conducting rod in the step four to penetrate through the round holes in the corresponding positions, welding four rectangular blocks around the outer surfaces of the two aluminum alloy shells, drilling threaded holes in the surfaces of the four rectangular blocks, and then fixing the two rectangular blocks in the corresponding positions by using bolts meeting the specification in a threaded manner.
Preferably, in the sixth step, the diameter of the semicircular wire grooves reserved in the two aluminum alloy shells and clamped with the main cable is smaller than the outer diameter of the main cable, and the diameter of the semicircular wire grooves reserved in the two aluminum alloy shells and clamped with the branch cable is smaller than the outer diameter of the branch cable.
Preferably, after the two aluminum alloy shells are prepared in the sixth step, a sealing strip is bonded to the clamping surface of one of the aluminum alloy shells through a fixing glue.
Preferably, after the seventh step, the two aluminum alloy shells in the sixth step and the circular hole gaps at the joints of the plurality of aluminum alloy heat conducting rods in the fourth step are hermetically welded in a welding manner.
Preferably, the special wire clamp in the second step is an aluminum alloy CL type wire clamp.
Preferably, in the fifth step, before injecting the heat-conducting glue solution, an air hole needs to be punched on the surface of one of the insulating sheaths through the injection needle.
Preferably, the main cable and the branch cable in the first step are reserved with lengths of 10 cm to 15 cm at positions between the insulating sheath and the aluminum alloy shell.
(III) advantageous effects
Compared with the prior art, the invention provides a manufacturing method of a pre-branch cable, which has the following beneficial effects:
1. the manufacturing method of the pre-branch cable comprises the steps that a prepared main cable, a prepared branch cable and a special cable clamp can be used for preparing the prefabricated branch cable, two prepared insulation shields are arranged, a hollow space is formed by enclosing the two insulation shields, heat at the joint of the main cable and the branch cable is easy to dissipate, the heat can be timely dissipated through filled heat conduction glue and a plurality of aluminum alloy heat conduction rods, the disconnection caused by overheating at the joint of the main cable and the branch cable is prevented, the joint can be protected through the two prepared aluminum alloy shells, the surface compressive strength of the joint is improved, stress points can be transferred to clamping points of the aluminum alloy shells, the main cable and the branch cable, and the stability of the joint of the main cable and the branch cable can be improved.
2. According to the manufacturing method of the pre-branch cable, the sealing performance of the two aluminum alloy shells after clamping and fixing can be guaranteed through the arranged sealing strips, and the influence of the tension on the connection position can be further reduced by reserving 10 cm-15 cm between the insulating shield and the aluminum alloy shells for the main cable and the branch cable.
Drawings
Fig. 1 is a schematic view of a cable structure manufactured by the manufacturing method of the pre-branch cable according to the present invention.
In the figure: 1 main cable, 2 cables, 3 fastener, 4 insulating shields, 5 aluminum alloy heat conduction rods, 6 aluminum alloy shells, 7 rectangular blocks, 8 sealing strips.
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.
Referring to fig. 1, a method for manufacturing a pre-branch cable includes the following steps:
the method comprises the following steps: manufacturing a main cable 1 and a branch cable 2 through drawing, stranding and coating processes;
step two: stripping off an insulating part of the connecting position of the main cable 1 and the branch cable 2 prepared in the first step, and fixedly crimping the main cable 1 and the branch cable 2 through a special wire clamp 3 and equipment;
step three: putting polyethylene raw materials into injection molding equipment, injecting the molten polyethylene raw materials into a special mold by the injection molding equipment, cooling and solidifying to form two insulating shields 4, reserving wire clamping grooves matched with the main cable 1 and the branch cables 2 on the surfaces of the two insulating shields 4, and reserving a plurality of plug holes on the surfaces of the two insulating shields 4;
step four: clamping the two insulation shields 4 obtained in the step three with the main cable 1 and the branch cable 2, inserting aluminum alloy heat conducting rods 5 with proper diameters at the inserting holes of the two insulation shields 4, melting the joints of the two insulation shields 4 and the aluminum alloy heat conducting rods 5 into a whole through heating equipment, and cooling and solidifying to form a closed space surrounded by the two insulation shields 4;
step five: injecting heat-conducting glue solution into a closed space formed by enclosing two insulation shields 4 in the fourth step through injection equipment, so that the heat-conducting glue solution is filled in the insulation shields 4 and is solidified;
step six: casting two aluminum alloy shells 6 meeting the insulation shield 4 in the third step by using a certain amount of aluminum alloy raw materials through casting equipment, wherein semicircular wire grooves matched with the main cable 1 and the branch cables 2 and circular holes matched with the aluminum alloy heat conducting rods 5 in the fourth step are reserved on the two aluminum alloy shells 6;
step seven: clamping the two aluminum alloy shells obtained in the sixth step with the main cable and the branch cable, enabling the aluminum alloy heat conducting rod 5 in the fourth step to penetrate through the round holes in the corresponding positions, welding four rectangular blocks 7 on the periphery of the outer surfaces of the two aluminum alloy shells 6, drilling threaded holes in the surfaces of the four rectangular blocks 7, and then fixing the two rectangular blocks 7 in the corresponding positions by using bolts meeting the specification in a threaded mode;
the preparation method of the main cable 1 and the branch cable 2 is prior art and not described in detail.
In the sixth step, the diameter of the semicircular wire grooves reserved for the two aluminum alloy shells 6 and clamped with the main cable 1 is smaller than the outer diameter of the main cable 1, and the diameter of the semicircular wire grooves reserved for the two aluminum alloy shells 6 and clamped with the branch cable 2 is smaller than the outer diameter of the branch cable 2, so that the sealing performance of the joints between the two aluminum alloy shells 6 and the main cable 1 and the branch cable 2 can be ensured.
After the two aluminum alloy shells 6 are prepared in the sixth step, the sealing strip 8 is bonded on the clamping surface of one of the aluminum alloy shells 6 through the fixing glue, so that the sealing performance between the two aluminum alloy shells 6 after being clamped can be ensured.
And after the seventh step, performing sealing welding on the circular hole gaps at the joints of the two aluminum alloy shells 6 in the sixth step and the plurality of aluminum alloy heat conducting rods 5 in the fourth step in a welding manner, so that the sealing property of the joints between the aluminum alloy heat conducting rods 5 and the aluminum alloy shells 6 can be ensured.
The special wire clamp 3 in the step two is an aluminum alloy CL type wire clamp, so that the stability of the main cable 1 and the branch cable 2 after compression joint can be ensured.
And step five, before injecting the heat-conducting glue solution, an air hole needs to be poked on the surface of one of the insulating sheaths 4 through the injection needle, so that air cannot be discharged when the heat-conducting glue solution is injected.
The lengths of the main cable 1 and the branch cables 2 between the insulating sheath 4 and the aluminum alloy shell 6 are reserved by 10 cm-15 cm, and when strong tensile force is applied, certain buffering can be performed through the reserved lengths, so that the influence of the tensile force on the connection position can be further reduced.
In summary, according to the manufacturing method of the pre-branch cable, during manufacturing, the main cable 1, the branch cable 2 and the special cable clamp 3 are manufactured, the prefabricated branch cable can be manufactured through the manufactured two insulation shields 4, because the two insulation shields 4 enclose to form a hollow space, heat at the joint of the main cable 1 and the branch cable 2 is easy to dissipate, the heat can be dissipated in time through the filled heat conducting glue and the aluminum alloy heat conducting rods 5, the joint of the main cable 1 and the branch cable 2 is prevented from being overheated to cause disconnection, the joint can be protected through the manufactured two aluminum alloy shells 6, the surface compressive strength of the joint is improved, stress points can be transferred to the clamping points of the aluminum alloy shells 6 and the main cable 1 and the branch cable 2, and the stability of the joint of the main cable 1 and the branch cable 2 can be improved.
It is to be noted that the term "comprises," "comprising," or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
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 invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The manufacturing method of the pre-branch cable is characterized in that: the method comprises the following steps:
the method comprises the following steps: manufacturing a main cable (1) and a branch cable (2) through drawing, stranding and coating processes;
step two: stripping off an insulating part of the connecting position of the main cable (1) and the branch cable (2) prepared in the step one, and performing compression joint and fixation on the main cable (1) and the branch cable (2) through a special wire clamp (3) and equipment;
step three: putting polyethylene raw materials into injection molding equipment, injecting the molten polyethylene raw materials into a special mold by the injection molding equipment, cooling and solidifying to form two insulating shields (4), reserving wire clamping grooves matched with the main cable (1) and the branch cables (2) on the surfaces of the two insulating shields (4), and reserving a plurality of plug holes on the surfaces of the two insulating shields (4);
step four: clamping the two insulation shields (4) obtained in the step three with the main cable (1) and the branch cable (2), inserting aluminum alloy heat conducting rods (5) with proper diameters at the inserting holes of the two insulation shields (4), melting the joints of the two insulation shields (4) and the aluminum alloy heat conducting rods (5) into a whole through heating equipment, and cooling and solidifying to enable the two insulation shields (4) to enclose a closed space;
step five: injecting heat-conducting glue solution into a closed space formed by enclosing two insulation shields (4) in the fourth step through injection equipment, and filling the heat-conducting glue solution into the insulation shields (4) and curing the heat-conducting glue solution;
step six: casting two aluminum alloy shells (6) meeting the insulation shield (4) in the third step by using a certain amount of aluminum alloy raw materials through casting equipment, wherein semicircular wire grooves matched with the main cable (1) and the branch cables (2) and circular holes matched with the aluminum alloy heat conducting rods (5) in the fourth step are reserved on the two aluminum alloy shells (6);
step seven: and (3) mutually clamping the two aluminum alloy shells obtained in the step six with the main cable and the branch cable, enabling the aluminum alloy heat conducting rods (5) in the step four to penetrate through the round holes in the corresponding positions, welding four rectangular blocks (7) around the outer surfaces of the two aluminum alloy shells (6), drilling threaded holes in the surfaces of the four rectangular blocks (7), and then fixing the two rectangular blocks (7) in the corresponding positions by using bolts meeting the specification in a threaded manner.
2. The method of manufacturing a pre-branch cable according to claim 1, wherein: in the sixth step, the diameter of the semicircular wire grooves reserved for the two aluminum alloy shells (6) and clamped with the main cable (1) is smaller than the outer diameter of the main cable (1), and the diameter of the semicircular wire grooves reserved for the two aluminum alloy shells (6) and clamped with the branch cable (2) is smaller than the outer diameter of the branch cable (2).
3. The method of manufacturing a pre-branch cable according to claim 1, wherein: and in the sixth step, after the two aluminum alloy shells (6) are prepared, a sealing strip (8) is bonded on the clamping surface of one aluminum alloy shell (6) through a fixing glue.
4. The method of manufacturing a pre-branch cable according to claim 1, wherein: and after the seventh step, sealing and welding circular hole gaps at the joints of the two aluminum alloy shells (6) in the sixth step and the plurality of aluminum alloy heat conducting rods (5) in the fourth step in a welding mode.
5. The method of manufacturing a pre-branch cable according to claim 1, wherein: the special wire clamp (3) in the second step is an aluminum alloy CL type wire clamp.
6. The method of manufacturing a pre-branch cable according to claim 1, wherein: and fifthly, before injecting the heat-conducting glue solution, an air hole needs to be poked on the surface of one insulating sheath (4) through an injection needle.
7. The method of manufacturing a pre-branch cable according to claim 1, wherein: the lengths of 10 cm to 15 cm are reserved at the positions, between the insulating sheath (4) and the aluminum alloy shell (6), of the main cable (1) and the branch cables (2) in the first step.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110424640.5A CN113161072B (en) | 2021-04-20 | 2021-04-20 | Manufacturing method of pre-branch cable |
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| CN202110424640.5A CN113161072B (en) | 2021-04-20 | 2021-04-20 | Manufacturing method of pre-branch cable |
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| CN113161072A CN113161072A (en) | 2021-07-23 |
| CN113161072B true CN113161072B (en) | 2022-07-12 |
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| 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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| CN208673759U (en) * | 2018-09-30 | 2019-03-29 | 山东冠亿电缆有限公司 | A kind of elastomer fire resistant flexible stretch-proof cable |
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| CN113161072A (en) | 2021-07-23 |
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