CN113937589A - Cable connection construction process - Google Patents
Cable connection construction process Download PDFInfo
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- CN113937589A CN113937589A CN202111303172.2A CN202111303172A CN113937589A CN 113937589 A CN113937589 A CN 113937589A CN 202111303172 A CN202111303172 A CN 202111303172A CN 113937589 A CN113937589 A CN 113937589A
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- 238000010276 construction Methods 0.000 title claims abstract description 16
- 238000003466 welding Methods 0.000 claims abstract description 63
- 210000001503 joint Anatomy 0.000 claims abstract description 17
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 16
- 229910052802 copper Inorganic materials 0.000 description 16
- 239000010949 copper Substances 0.000 description 16
- 229910000838 Al alloy Inorganic materials 0.000 description 11
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- 230000005684 electric field Effects 0.000 description 6
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Processing Of Terminals (AREA)
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Abstract
The invention discloses a cable connection construction process, which comprises the steps of firstly sleeving a middle joint on a pretreated cable core in advance, then melting and welding the cable cores at two ends together in a welding mould, moving the middle joint to the welding position of the two cable cores, clamping and fixing, and realizing the connection of two cables; and finally, the cable is restored and buried underground, so that the laying work can be completed, the process is simple, and the laying efficiency is high. The technical scheme of the invention effectively solves the problems of complex welding and laying process, insecure cable connection structure and reduced transmission capability of the existing cable in the prior art.
Description
Technical Field
The invention belongs to the technical field of cable connection, and relates to a cable connection construction process.
Background
With the definition of the targets of carbon peak reaching and carbon neutralization, the new energy project keeps a long-term high-speed development situation, and the power cable is an important component of the wind-solar-electric field power collection line, but is easy to fail at the cable middle joint of the field power collection line. The electric field of the intermediate joint and the insulating layer is highly concentrated due to the fact that the insulating layer of the 35KV aluminum alloy cable is thick, and great difficulty is brought to safe operation of the directly-buried cable.
Existing cable joints can be divided into three types: the strip winding type, the cold shrinkage type and the hot shrinkage type are characterized in that through analysis and comparison of actual field faults, the three cable joints have the problem of high fault rate, mainly show the problems of incompact compression joint, creep deformation, increased contact resistance, pointed end on the surface of a connecting pipe, uncured and unsealed sealing waterproof materials and the like, the wind-solar electric field aluminum cable adopts a direct-buried laying mode, and after one cable joint breaks down and fires, other cables can be ignited to cause accidents.
Stress cones are often arranged between the edge of the metal sheath of the cable and the surface of the winding insulation, the arrangement mode complicates the field installation process, and only the internal field intensity can be reduced in a limited way. Meanwhile, the cable welding part is easy to bend and further deform, a plurality of cable joints are concentrated together in a direct-buried laying mode of the wind-solar-electric-field aluminum cable, the negative influence benefit of the wind-solar-electric-field aluminum cable can be enlarged, the flow guiding amount is reduced, the transmission capacity is reduced, and the overall reliability is influenced.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the cable connection construction process comprises the steps of welding a cable, connecting a cable with the cable, and welding a welding mould.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a cable connection construction process uses an intermediate joint and a welding mould for welding and connection, and comprises the following specific steps:
(1) exposing the cable cores of the two cables;
(2) sleeving the intermediate connector on one of the two cables;
(3) welding the two cable cores together in a welding mould;
(4) moving the middle joint to the welding position of the two cable cores, and fastening the cable cores through the middle joint;
(5) two cables are repaired.
Wherein:
the welding mold comprises: the die comprises a die body and a die body, wherein the die body is provided with a plurality of cavities and a plurality of fixing structures, the fixing structures can fix cable cores, and the cavities are used for providing spaces required by the welding of the cable cores; clamping structure, cable core can fix in clamping structure, and clamping structure is movably set up on the mould body in order to adjust the distance between the cable core.
The intermediate joint comprises: the connector comprises a connector main body, a first through hole and one or more second through holes, wherein the first through hole is formed in the axial direction and used for penetrating through a cable core; the number of the compression bolts is consistent with that of the second through holes, the compression bolts are movably arranged in the second through holes, the cable cores are arranged in the first through holes, and the compression bolts can fix the cable cores on the inner wall of the joint main body to limit the cable cores to move in the main body.
And (3) putting the two cable cores to be welded into the die body, clamping the end parts of the cable cores through the clamping structure, adjusting the positions, and then starting welding.
And (4) tightening the compression bolt to further fasten the cable core at the welding position.
Further, compression bolt includes fixed part, receives drive division, pole portion and butt portion, and the fixed part passes through helicitic texture detachably and sets up in the second through-hole, and pole portion passes through helicitic texture movably and sets up in the fixed part, and butt portion sets up in pole portion towards the inside one end of joint main part and can contact with the cable core, receives the drive division setting to keep away from the inside one end of joint main part in pole portion.
Further, butt portion movably sets up on pole portion, and butt portion can set up the curved surface of the surperficial looks adaptation with the cable core with the surface that the cable core contacted.
Further, the driven part is detachably provided on the lever part.
Furthermore, the axial both ends of main part are provided with stress cone or stress ring, and the cable core can wear to establish in stress cone or stress ring.
Further, a thread-shaped groove or a plurality of annular grooves are axially arranged on the hole wall of the first through hole.
Further, the clamping structure is movably arranged on the die body through a screw mechanism.
Further, be provided with reaction chamber, butt fusion chamber and weeping chamber in the mould body, the reaction chamber is used for the dress to be used for welded powder, and the tip of cable core can stretch into and accomplish the welding in the butt fusion chamber, and the weeping chamber sets up in butt fusion chamber below, and unnecessary welding material can drip to the weeping chamber in through the butt fusion chamber.
Further, the fixing structure in the die body is groove-shaped.
The invention has the beneficial effects that:
the intermediate joint is provided with the first through hole and the second through hole, the cable core which is fused and welded into a whole can be axially arranged in the first through hole in a penetrating manner, the second through hole is internally provided with the compression bolt, and the compression bolt can clamp and fix the cable core on the inner wall of the main body of the intermediate joint under the condition that the cable core is arranged in the first through hole in a penetrating manner, so that the cable connection structure is firm and stable, and the transmission capability is improved.
The welding mould can adjust the distance between the cable cores by moving the clamping structure, and is beneficial to improving the welding effect and the welding efficiency between the cable cores.
By applying the technical scheme of the invention, when cable laying work is carried out on site, workers only need to sleeve the intermediate connector on the pretreated cable cores in advance, then melt and weld the cable cores at two ends together in a welding mould, and then move the intermediate connector to the welding position of the two cable cores and clamp and fix the intermediate connector, so that the connection of the two cables can be realized. And finally, the cable is restored and buried underground, so that the laying work can be completed, the process is simple, and the laying efficiency is high.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a 35KV wind farm directly-buried aluminum alloy cable in the prior art;
FIG. 2 is a schematic cross-sectional view of an embodiment of the welding die of the present invention;
FIG. 3 is an exploded view of the welding die of FIG. 2;
fig. 4 is a schematic cross-sectional view of an embodiment of an intermediate joint of the present invention.
In the figure: 1, a cable core; 2 an inner semiconductive layer; 3 an insulating layer; 4 an outer semiconducting layer; 5 a copper shield layer; 6 an inner jacket layer; 7 an armor layer; 8 an outer jacket layer; 9 a reaction chamber; 10 a spacer; 11, a diversion trench; 12 a screw mechanism; 13 welding a cavity; 14 a liquid leakage cavity; 15 a driven part; 16 a fixing part; 17 an abutting portion; 18 stress ring; 19 a thread-like recess; 21 a rod part; 22 a connector body.
Detailed Description
The following further describes a specific embodiment of the present invention with reference to the drawings and technical solutions.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the figure), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Taking a 35KV wind farm directly-buried aluminum alloy cable as an example, as shown in fig. 1, the cable structure comprises, from inside to outside, a cable core 1, an inner semi-conducting layer 2, an insulating layer 3, an outer semi-conducting layer 4, a copper shielding layer 5, an inner sheath layer 6, an armor layer 7, and an outer sheath layer 8. When two cables are connected, the outer protective layer needs to be peeled off according to the preset requirement, the cable cores 1 are exposed and convenient to weld, and the two welded cable cores are connected and fixed through the middle joint, so that the phenomenon that the welding position is broken and separated to influence the conveying effect of the cables is avoided.
As shown in fig. 4, the intermediate joint of the present embodiment includes a joint main body 22 and a compression bolt, wherein the joint main body 22 is provided with a first through hole for penetrating the cable core 1 in an axial direction and a second through hole in a radial direction; a compression bolt is movably arranged in the second through hole, the compression bolt being capable of applying a pressure to the cable core 1, clamping the cable core 1 against the inner wall of the joint body 22 to restrict the movement of the cable core 1 in said joint body 22, in case the cable core 1 is arranged in the first through hole as shown.
By applying the technical scheme of the invention, the intermediate joint is provided with the first through hole and the second through hole, the cable core which is fused and welded into a whole can be axially arranged in the first through hole in a penetrating manner, the second through hole is internally provided with the compression bolt, and under the condition that the cable core 1 is arranged in the first through hole in a penetrating manner, the compression bolt can clamp and fix the cable core 1 on the inner wall of the intermediate joint main body 22, so that the cable connection structure is firm and stable, and the transmission capability is improved.
As shown in fig. 4, the main body 22 of this embodiment is provided with a screw-shaped groove 19 on the inner wall thereof in the axial direction of the first through-hole, so that the intermediate connector can be rotatably fitted over the cable core. After the welding operation is finished, the middle joint can be returned to the welding position in a rotating mode, so that two sides of the middle joint respectively correspond to the end parts of the two cable cores, and the operation is convenient. Meanwhile, the thread-shaped groove 19 forms a concave-convex structure on the hole wall of the first through hole, so that the friction force between the cable core and the intermediate joint is increased, the resistance can be effectively provided when the cable core is compressed by the compression bolt, and the effect of limiting the movement of the cable core is achieved.
In other embodiments not shown in the drawings, the thread-shaped groove 19 may be replaced by a plurality of annular grooves, and the plurality of annular grooves may also form a concave-convex structure on the wall of the first through hole, and serve to restrict the movement of the cable core when the compression bolt compresses the cable core.
As shown in fig. 4, the main body 22 of the present embodiment is provided with stress rings 18 at both axial ends thereof, and the cable core 1 can be inserted into the stress rings 18. The electric field distribution in the cable terminal and the middle joint is greatly changed compared with the cable body due to the reasons that the section of the cable core junction is enlarged, the thickness and the dielectric constant of the additional insulation are different from the insulation of the cable body and the like, and the axial electric field intensity along the direction of the cable insulation surface, namely axial stress is mainly generated. A stress relief structure is therefore needed to address the above problems. The traditional stress cone has a complex structure and a large occupied space, and increases the construction difficulty to a certain extent. The intermediate joint of this embodiment adopts stress ring 18, and stress ring 18 is made by nonlinear resistance material, and it needs great insulation thickness different from the stress cone, has consequently simplified the mounting process and occupation space is little, and during the cable operation in the engineering reality, can produce a minimum electric current in stress ring 18, and the corresponding linear pressure drop that produces in surface to the axial stress of cable has been reduced, and the production that has reduced the corona has and then guaranteed the operating life of cable.
As shown in fig. 4, the compression bolt of the present embodiment includes a fixing portion 16, a driven portion 15, a rod portion 21, and an abutting portion 17, wherein the fixing portion 16 is detachably disposed in the second through hole by a screw structure, the rod portion 21 is movably disposed in the fixing portion 16 by a screw structure, the abutting portion 17 is disposed at one end of the rod portion 21 facing the inside of the main body 22 and is capable of contacting with the cable core 1, and the driven portion 15 is disposed at one end of the rod portion 21 away from the inside of the main body 22.
The fixing part 16 may pre-fix the compression bolt in the second through hole by means of a screw structure and then compress the abutment 17 against the cable core 1 by means of the moving rod part 21.
As shown in fig. 4, the driven portion 15 may be designed as a polygon such as a hexagonal head of a bolt, or as a groove structure such as a screw-in-line groove or a cross-shaped groove, or as other hollow structures for receiving and transmitting torque, so that the rod portion 21 can move in the fixing portion 16.
In order to make the outer surface of the intermediate joint relatively flat after the construction is completed and prevent the distortion of the electric field, the driven part 15 of the present embodiment is detachably provided on the rod part 21. Specifically, the driven portion 15 may be separated from the rod portion 21 by a plug-fit manner, i.e., the driven portion 15 is pulled out of the rod portion 21 when the rod portion 21 is screwed to a certain position. Or when the torque between the driven part 15 and the rod part 21 is larger than a preset value, the driven part 15 and the rod part 21 are separated.
As shown in fig. 4, the abutting portion 17 of the present embodiment is movably provided on the lever portion 21, and a surface of the abutting portion 17 contactable with the cable core 1 is provided as a curved surface adapted to the surface of the cable core 1. The surface of the abutting part 17 is matched with the surface of the cable core 1, so that the contact area between the abutting part 17 and the cable core 1 is increased, and the pressing effect is favorably ensured. The lever portion 21 is movable relative to the abutment portion 17 so that, when the lever portion 21 is screwed, the abutment portion 17 can remain stable relative to the cable core 1, providing only pressure, facilitating the abutment of the abutment portion 17 with the cable core 1.
The invention also provides a welding mould, as shown in fig. 2 and 3, the welding mould of the embodiment comprises a mould body and a clamping structure, wherein the mould body is provided with a plurality of cavities such as a reaction cavity 9, a welding cavity 13 and a liquid leakage cavity 14, a plurality of groove-shaped fixing structures for positioning cable cores are further arranged in the mould body, and the cable cores are placed in the fixing structures and can be kept stable in the welding process. Be used for during the welded powder pours into reaction chamber 9 earlier, after the reaction of igniting, the welding flux passes through guiding gutter 11 and gets into butt fusion chamber 13, is provided with isolation gasket 10 in the bottom of reaction chamber 9 promptly guiding gutter 11's entrance, and the tip of cable core 1 can stretch into butt fusion chamber 13, and powder falls into and accomplishes the welding between two cable core 1. And after the reaction is finished, rapidly cooling the cable core. And (4) polishing the fused and welded conductor to enable the conductor to have the same diameter with the cable core, and polishing. A weep cavity 14 is provided below the weld cavity 13, and excess weld material can drip through the weld cavity 13 into the weep cavity 14.
The welding mould further comprises a clamping structure, the clamping structure is movably arranged on the mould body, the cable cores 1 can be fixed in the clamping structure, so that the distance between the cable cores 1 can be adjusted by moving the clamping structure, and the welding effect and the welding efficiency between the cable cores 1 are improved.
The clamping structure of the present embodiment is movably disposed on the die body by a screw mechanism 12. The screw mechanism 12 can continuously and stably adjust the distance between the cable cores 1, and the adjustment precision is relatively high.
The invention also provides a cable connection construction process, which comprises the following specific process steps:
(1) cable treatment:
according to the process requirements, longitudinally stripping two sections of cables from outside to inside according to an outer sheath layer 8, an armor layer 7, an inner sheath layer 6, a copper shielding layer 5, an outer semi-conducting layer 4, an insulating layer 3 and an inner semi-conducting layer 2 in sequence; wherein, the short end of the outer sheath layer 8 is stripped by about 700mm, and the long end is stripped by about 1100 mm; the length of the armor layer 7 is reserved for about 20mm, and a rear port is sawed off; the length of the inner sheath layer 6 is about 50 mm; stripping the copper shielding layer 5 to the length of A +50mm, and winding two layers of electrical tapes at the fracture in order to prevent the copper shielding layer 5 from scattering; the outer semiconducting layer 4 is about a long (a is as sized in table 1); a blade chamfer 300 is used for the fracture of the outer semi-conducting layer 4 to enable the outer semi-conducting layer 4 to be smoothly transited to the insulating layer 3, and conductive particles and tool marks on the insulating surface are polished by an abrasive belt; cutting off the cable insulating layer 3 by using a rotary cutter, wherein the positioning distance between the stripped insulating layer and the shaft end is about 72 mm; about 2mm of the inner semiconducting layer 2 remains; the cable surface was smoothed with sandpaper and then cleaned.
TABLE 1
| Model number | 50-95 | 120-240 | 300-400 | 500-630 |
| Suitable cross section | 50/70/95 | 120/150/185/240 | 300/400 | 500/630 |
| A(mm) | 207 | 215 | 222 | 267 |
(2) Pre-fitting the splice components:
the heat-shrinkable sleeve is sleeved from the end of one cable to automatically slide to the outer sheath layer 8, the heat-shrinkable sleeve is sleeved at the long end of the aluminum alloy cable, the copper shielding net is sleeved at the short end of the aluminum alloy cable, and the intermediate connector is sleeved from the end of one cable.
(3) Connecting cable conductors:
step 1: and (4) melting. Removing water vapor on the surface of the cable in advance, putting two aluminum alloy cable cores 1 to be welded into a welding cavity 13, screwing a screw mechanism 12 to fix the aluminum alloy cable cores 1 in parallel after adjusting the position of the cable, avoiding conductor movement, putting welding powder into a reaction cavity 9, and after ignition reaction, enabling welding powder to flow through a flow guide groove 11 and a welding cavity 13 to weld the aluminum alloy cable cores. And cooling the cable core rapidly after the reaction is finished. And (4) polishing the fused and welded conductor to enable the fused and welded conductor to be equal in diameter with the cable core, and polishing.
Step 2: and (4) rotationally feeding and compacting. The intermediate joint is slid and wrapped around the fusion-welded portion of the aluminum alloy cable, and the driven portion 15 is twisted using a special tool to control the abutting portion 17 against and apply pressure to the cable core 1, thereby fastening the cable core 1.
(4) And (3) recovering the inner semi-conducting layer:
cleaning the surfaces of the cable core 1, the inner semi-conducting layers 2 and the insulating layer 3 by absolute ethyl alcohol, and wrapping the semi-conducting polyethylene tape from the outer side of one inner semi-conducting layer 2 to the outer side of the other inner semi-conducting layer 2 after tensioning; in order to ensure that the middle connector is completely wrapped, two layers of semi-conductive polyethylene tapes are wound, meanwhile, the crimping groove is wound to be flat through the semi-conductive polyethylene tapes, and the end part of the middle connector is wound with the SRM-02 material.
(5) And (3) recovering the insulating layer:
and a main insulating tape of crosslinked polyethylene with the insulation thickness consistent with that of the aluminum cable body is continuously, uniformly and tightly lapped and wound.
(6) And (3) recovering the outer semi-conducting layer:
cleaning the surface of the insulation repairing layer by using absolute ethyl alcohol, and wrapping the semi-conductive polyethylene tape from the outer side of one outer semi-conductive layer 3 to the outer side of the other outer semi-conductive layer 3 after tensioning;
(7) installing a middle main joint:
and moving the heat-shrinkable sleeve from the position of the outer sheath layer 8 to the position of the middle joint, and heating the heat-shrinkable sleeve by aligning an air spray gun to the heat-shrinkable sleeve, wherein the heating mode is that the heat-shrinkable sleeve is firstly heated at the central position so as to shrink towards two sides. When the intermediate joint contracts, the cable is ensured to be straight.
(8) And (3) recovering the copper shielding layer:
firstly, winding the copper shielding net at the main body of the intermediate joint in a half lap joint mode, then externally coating the copper shielding net with a copper woven ground wire, fixing the ends of the copper shielding net and the ground wire on a copper shielding layer 5 by using a constant force spring, and winding the copper shielding net and the ground wire by using a white electrical adhesive tape to prevent the spring from loosening. A black flame retardant tape was used to wind from one end copper shield layer 5 to the other end copper shield layer 5.
(9) Recovering the inner sheath layer:
use the abrasive band to polish the surface of inner sheath layer 6, polish and clean, fill inner sheath layer 6 and 5 junctions of copper shield layer with sealed glue, wind from the 6 outsides of an inner sheath layer to another 6 outsides of inner sheath layer after will waterproof self-adhesive tape is taut.
(10) And (3) recovering the armor layer:
the armor tape outer packing opening is opened by taking the rubber glove, and in order to prevent the armor tape from hardening, the armor tape after the package is opened can be soaked in water firstly and then can be used rapidly. The armor tape was wrapped around about 150mm half lap from one end overlapping the armor 7 to the other end and then rewound. And redundant armor belts are used for winding at the middle joint and nearby cables to strengthen protection until the matched armor belts are completely used up, and the ports of the armor belts are fixed by black flame-retardant adhesive tapes.
(11) Recovering the outer sheath layer:
the waterproof self-adhesive tape is tensioned and then wrapped to the outer side of the other outer sheath layer 8 from the outer side of the one outer sheath layer 8, and the heat-shrinkable sleeve which is pre-sleeved on the outer sheath layer 8 is heated to shrink and then tightly wrapped on the outer sheath layer 8.
By applying the technical scheme of the invention, when cable laying work is carried out on site, workers only need to sleeve the intermediate joint on the pretreated cable cores in advance, then melt and weld the cable cores at two ends together, and then move the intermediate joint to the welding position of the two cable cores and clamp and fix the intermediate joint, so that the connection of the two cables can be realized. And finally, the cable is restored and buried underground, so that the laying work can be completed, the process is simple, and the laying efficiency is high.
According to the requirements of cable raw materials, main structure and specification, the high-voltage shielding, insulation and external shielding of the cable are fused and combined to form a cable electric field preset part without a stress cone and an air gap interface; the aluminum alloy cable conductor is fixed by a rotary feeding and pressing technology and a novel intermediate joint, and the connection mode increases the conductive sectional area, so that the conductivity of the aluminum alloy cable is increased; the whole process flow has the advantages of preventing the aluminum cable from bending, creeping, oxidizing and wetting at welding spots and the like.
Claims (10)
1. The utility model provides a cable junction construction technology, uses welding mould and middle joint to weld and connect which characterized in that, concrete step is:
(1) exposing the cable cores of the two cables;
(2) sleeving the intermediate connector on one of the two cables;
(3) welding the two cable cores together in a welding mould;
(4) moving the middle joint to the welding position of the two cable cores, and fastening the cable cores through the middle joint;
(5) repairing two cables;
wherein:
the welding mold comprises:
the die comprises a die body, a die body and a die core, wherein the die body is internally provided with a plurality of cavities and a plurality of fixing structures, the fixing structures are used for fixing cable cores, and the cavities are used for providing spaces required by the welding of the cable cores;
the clamping structure is fixed in the clamping structure and movably arranged on the die body so as to adjust the distance between the cable cores;
the intermediate joint comprises:
the connector comprises a connector main body, a first through hole and one or more second through holes, wherein the first through hole is formed in the axial direction and used for penetrating through a cable core;
the number of the compression bolts is consistent with that of the second through holes, the compression bolts can be movably arranged in the second through holes, the cable cores are arranged in the first through holes, and the compression bolts fix the cable cores on the inner wall of the joint main body so as to limit the cable cores to move in the joint main body.
2. The cable connection construction process according to claim 1,
in the step (3), the two cable cores to be welded are placed in the die body, the end parts of the cable cores are clamped through the clamping structure, the positions are adjusted, and then welding is started;
and (4) tightening the compression bolt to further fasten the cable core at the welding position.
3. The cable connection construction process according to claim 1 or 2, wherein the intermediate joint comprises a fixing portion, a driven portion, a rod portion and an abutting portion, the fixing portion is detachably disposed in the second through hole through a threaded structure, the rod portion is movably disposed in the fixing portion through a threaded structure, the abutting portion is disposed at one end of the rod portion facing the inside of the joint main body and is in contact with the cable core, and the driven portion is disposed at one end of the rod portion away from the inside of the joint main body.
4. The cable connection construction process according to claim 1 or 2, wherein in the intermediate joint, the abutting part is movably arranged on the rod part, and the surface of the abutting part contacting with the cable core is a curved surface matched with the surface of the cable core.
5. The cable connection process according to claim 3, wherein the driven part is detachably provided on the rod part in the intermediate joint.
6. The cable connection construction process according to claim 1 or 2, wherein in the intermediate joint, stress cones or stress rings are arranged at two axial ends of the main body, and the cable core is arranged in the stress cones or stress rings in a penetrating manner.
7. The cable connection construction process according to claim 1 or 2, wherein a threaded groove or a plurality of annular grooves are axially formed on the wall of the first through hole in the intermediate joint.
8. The cable connection process according to claim 1 or 2, wherein the clamping structure is movably disposed on the mold body by a screw mechanism in the welding mold.
9. The cable connection construction process according to claim 1 or 2, wherein a reaction cavity, a welding cavity and a leakage cavity are arranged in the welding mold, the reaction cavity is used for containing powder for welding, the end part of the cable core extends into the welding cavity to complete welding, the leakage cavity is arranged below the welding cavity, and redundant welding materials are dripped into the leakage cavity through the welding cavity.
10. The cable connection process according to claim 1 or 2, wherein the fixing structure is formed in a groove shape in the welding mold.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114312389A (en) * | 2022-01-30 | 2022-04-12 | 郑州恒天铜业有限公司 | New energy automobile fills electric pile with cable and jointing equipment that have waterproof function |
| CN116727950A (en) * | 2023-08-09 | 2023-09-12 | 宝牌电缆实业有限公司 | Cable conductor connects welding equipment |
| CN117996539A (en) * | 2024-04-07 | 2024-05-07 | 广州市新兴电缆实业有限公司 | Welding device for welding cable conductor joint |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0328903A2 (en) * | 1988-02-17 | 1989-08-23 | General Electric Company | Method and apparatus for making a superconducting joint |
| CN2640086Y (en) * | 2003-07-28 | 2004-09-08 | 保定合力达电缆附件有限公司 | Shrinkage power cable intermediate connector |
| CA2789975A1 (en) * | 2012-09-19 | 2014-03-19 | William Diesel | Splice for a mineral insulated cable |
| CN104065021A (en) * | 2014-04-23 | 2014-09-24 | 李超 | False cable joint |
| CN104967066A (en) * | 2015-06-11 | 2015-10-07 | 天津送变电工程公司 | Crosslinked cable prefabricated intermediate joint installation method |
| CN106329268A (en) * | 2016-08-17 | 2017-01-11 | 长园电力技术有限公司 | Wrapping and molding manufacturing method for middle connector of cross-linked polyethylene insulated power cable |
| CN206316536U (en) * | 2016-12-23 | 2017-07-11 | 广州市雷斯盾电气科技发展有限公司 | A kind of exothermic welding mould |
| CN107123956A (en) * | 2017-05-15 | 2017-09-01 | 深圳科创新源新材料股份有限公司 | A kind of intermediate joint of electric cable welding and renovation technique |
| WO2018095177A1 (en) * | 2016-11-22 | 2018-05-31 | 吉林省中赢高科技有限公司 | Special-shaped cable and preparation method therefor |
| CN207705751U (en) * | 2017-11-07 | 2018-08-07 | 广州高力电缆附件有限公司 | A kind of cable intermediate joint |
| CN109286083A (en) * | 2018-09-28 | 2019-01-29 | 乐清市华仪电缆附件有限公司 | A kind of three-core cable welded joint and its mounting process |
| CN109659788A (en) * | 2019-01-28 | 2019-04-19 | 深圳市沃尔核材股份有限公司 | Cable welding equipment |
| CN109818161A (en) * | 2019-01-14 | 2019-05-28 | 和瑞达(广州)电力服务有限公司 | A kind of recovery 10kV and 27.5kV cable body melt connection method |
| CN109861141A (en) * | 2019-03-28 | 2019-06-07 | 国网江苏省电力有限公司徐州供电分公司 | A kind of production method of three-core cable transition joint |
| CN109935981A (en) * | 2019-03-29 | 2019-06-25 | 广东科启电力技术有限公司 | A kind of 35kV--220kV pouring type cable ontology fusion splice and preparation method thereof |
| CN110854793A (en) * | 2019-12-19 | 2020-02-28 | 安徽省浩辉电力股份有限公司 | Novel hot melt type cable intermediate connector |
| CN210926353U (en) * | 2019-11-11 | 2020-07-03 | 沈阳国联电缆附件制造有限公司 | Welding formula cable intermediate head and be used for welding its welding mould |
| CN210957760U (en) * | 2019-12-13 | 2020-07-07 | 云南电网有限责任公司德宏供电局 | Wire connector free of repeated use in press connection |
| CN211150821U (en) * | 2019-12-31 | 2020-07-31 | 南京瑞铎电气有限公司 | Full-recovery type cable welding head |
-
2021
- 2021-11-05 CN CN202111303172.2A patent/CN113937589B/en active Active
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0328903A2 (en) * | 1988-02-17 | 1989-08-23 | General Electric Company | Method and apparatus for making a superconducting joint |
| CN2640086Y (en) * | 2003-07-28 | 2004-09-08 | 保定合力达电缆附件有限公司 | Shrinkage power cable intermediate connector |
| CA2789975A1 (en) * | 2012-09-19 | 2014-03-19 | William Diesel | Splice for a mineral insulated cable |
| CN104065021A (en) * | 2014-04-23 | 2014-09-24 | 李超 | False cable joint |
| CN104967066A (en) * | 2015-06-11 | 2015-10-07 | 天津送变电工程公司 | Crosslinked cable prefabricated intermediate joint installation method |
| CN106329268A (en) * | 2016-08-17 | 2017-01-11 | 长园电力技术有限公司 | Wrapping and molding manufacturing method for middle connector of cross-linked polyethylene insulated power cable |
| WO2018095177A1 (en) * | 2016-11-22 | 2018-05-31 | 吉林省中赢高科技有限公司 | Special-shaped cable and preparation method therefor |
| CN206316536U (en) * | 2016-12-23 | 2017-07-11 | 广州市雷斯盾电气科技发展有限公司 | A kind of exothermic welding mould |
| CN107123956A (en) * | 2017-05-15 | 2017-09-01 | 深圳科创新源新材料股份有限公司 | A kind of intermediate joint of electric cable welding and renovation technique |
| CN207705751U (en) * | 2017-11-07 | 2018-08-07 | 广州高力电缆附件有限公司 | A kind of cable intermediate joint |
| CN109286083A (en) * | 2018-09-28 | 2019-01-29 | 乐清市华仪电缆附件有限公司 | A kind of three-core cable welded joint and its mounting process |
| CN109818161A (en) * | 2019-01-14 | 2019-05-28 | 和瑞达(广州)电力服务有限公司 | A kind of recovery 10kV and 27.5kV cable body melt connection method |
| CN109659788A (en) * | 2019-01-28 | 2019-04-19 | 深圳市沃尔核材股份有限公司 | Cable welding equipment |
| CN109861141A (en) * | 2019-03-28 | 2019-06-07 | 国网江苏省电力有限公司徐州供电分公司 | A kind of production method of three-core cable transition joint |
| CN109935981A (en) * | 2019-03-29 | 2019-06-25 | 广东科启电力技术有限公司 | A kind of 35kV--220kV pouring type cable ontology fusion splice and preparation method thereof |
| CN210926353U (en) * | 2019-11-11 | 2020-07-03 | 沈阳国联电缆附件制造有限公司 | Welding formula cable intermediate head and be used for welding its welding mould |
| CN210957760U (en) * | 2019-12-13 | 2020-07-07 | 云南电网有限责任公司德宏供电局 | Wire connector free of repeated use in press connection |
| CN110854793A (en) * | 2019-12-19 | 2020-02-28 | 安徽省浩辉电力股份有限公司 | Novel hot melt type cable intermediate connector |
| CN211150821U (en) * | 2019-12-31 | 2020-07-31 | 南京瑞铎电气有限公司 | Full-recovery type cable welding head |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114312389A (en) * | 2022-01-30 | 2022-04-12 | 郑州恒天铜业有限公司 | New energy automobile fills electric pile with cable and jointing equipment that have waterproof function |
| CN114312389B (en) * | 2022-01-30 | 2024-01-30 | 郑州恒天铜业有限公司 | New energy automobile fills electric pile with cable and coupling equipment that have waterproof function |
| CN116727950A (en) * | 2023-08-09 | 2023-09-12 | 宝牌电缆实业有限公司 | Cable conductor connects welding equipment |
| CN116727950B (en) * | 2023-08-09 | 2023-10-13 | 宝牌电缆实业有限公司 | Cable conductor connects welding equipment |
| CN117996539A (en) * | 2024-04-07 | 2024-05-07 | 广州市新兴电缆实业有限公司 | Welding device for welding cable conductor joint |
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