CN117374692A - Crimping die, metal connecting pipe and crimping method for conductor of large-length submarine cable - Google Patents

Crimping die, metal connecting pipe and crimping method for conductor of large-length submarine cable Download PDF

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Publication number
CN117374692A
CN117374692A CN202311571418.3A CN202311571418A CN117374692A CN 117374692 A CN117374692 A CN 117374692A CN 202311571418 A CN202311571418 A CN 202311571418A CN 117374692 A CN117374692 A CN 117374692A
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CN
China
Prior art keywords
die
crimping
metal
pipe
conductor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311571418.3A
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Chinese (zh)
Inventor
尹涛
赵囿林
胡明
杜强
李洋
钱小秦
陈龙
刘磊
孙杰
顾鹙旭
谢书鸿
潘盼
陈杰
房晶晶
陈晨
周小敏
王佳佳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanhai Cable Co ltd
Zhongtian Dafeng Submarine Cable Co ltd
Jiangsu Zhongtian Technology Co Ltd
Zhongtian Technology Submarine Cable Co Ltd
Original Assignee
Nanhai Cable Co ltd
Zhongtian Dafeng Submarine Cable Co ltd
Jiangsu Zhongtian Technology Co Ltd
Zhongtian Technology Submarine Cable Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanhai Cable Co ltd, Zhongtian Dafeng Submarine Cable Co ltd, Jiangsu Zhongtian Technology Co Ltd, Zhongtian Technology Submarine Cable Co Ltd filed Critical Nanhai Cable Co ltd
Priority to CN202311571418.3A priority Critical patent/CN117374692A/en
Publication of CN117374692A publication Critical patent/CN117374692A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/048—Crimping apparatus or processes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/01—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the form or arrangement of the conductive interconnection between the connecting locations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/03—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the relationship between the connecting locations
    • H01R11/05—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the relationship between the connecting locations the connecting locations having different types of direct connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/03—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the relationship between the connecting locations
    • H01R11/09—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the relationship between the connecting locations the connecting locations being identical

Abstract

The invention provides a crimping die, a metal connecting pipe and a crimping method for a conductor of a long submarine cable, and relates to the technical field of cable crimping, wherein the crimping die comprises: the device comprises a supporting seat, a first module and a second module. The supporting seat is provided with a crimping channel; the first die set comprises a first die and a second die, and the first die and the second die are respectively arranged at two opposite sides of the crimping channel; the second module comprises a third die and a fourth die which are respectively arranged at two opposite sides of the crimping channel; the first die, the third die, the second die and the fourth die are uniformly distributed along the circumferential direction of the crimping passage, and each has a crimping face configured as a plane. When the workpiece is pressed and connected, the pressing surface which is constructed into a plane can press the workpiece in a plane contact mode, and along with the increase of the pressing force, the stress at each position of the workpiece can be ensured to be balanced, no matter the pipe diameter, no bending can be generated at the pressing joint, and the structural strength of the conductor connecting part can be ensured.

Description

Crimping die, metal connecting pipe and crimping method for conductor of large-length submarine cable
Technical Field
The invention relates to the technical field of cable crimping, in particular to a crimping die, a metal connecting pipe and a crimping method for a conductor of a long-length submarine cable.
Background
Submarine cables are mainly used in three fields: 1. continents and islands, islands and islands; 2. continental and petroleum platforms; 3. and (5) transmitting the wind power generation field at sea. With the rapid development of offshore wind power generation, extra-high voltage, large-capacity and long-length submarine cables are further applied. In actual production, a long submarine cable needs to be continuously produced through conductor connection in a crosslinking process, wherein if the conductor connection is unstable, abnormal production shutdown or abnormal product quality may be caused.
In the related art, the conductor connection mode of the submarine cable with a large length in the crosslinking process is optimized to be cold-press-connected by the traditional welding modes such as gas welding, argon arc welding and the like. Cold crimping refers to a process in which a cable conductor is inserted into a metal connecting pipe at room temperature, and then a special crimping process is used to plastically deform the connecting part of the metal connecting pipe by means of a crimping device, so that the metals are contacted to achieve intergranular bonding and then connected into a whole.
Existing partial crimping devices typically include only an upper die and a lower die, between which a workpiece is placed during the crimping process, and then the upper die and the lower die are brought closer to each other and squeeze the workpiece. However, in the existing processing mode, the upper die and the lower die are respectively provided with a notch or an arc surface to press-joint the workpiece, so that ideal cross section and appearance quality cannot be formed, the workpiece facing different pipe diameters can be bent at the press-joint position, the strength of the conductor joint position is lower, and finally the electrical performance and mechanical performance of the press-joint position cannot be ensured.
In addition, in the existing crimping method, the conductor section materials in the crimping connecting pipe are loose after crimping, the crimping is uneven, the complete compaction is difficult, the number of times of crimping failure is large, and the crimping efficiency is seriously affected. Meanwhile, redundant conductor materials are extruded out of a die cavity after crimping to form burrs and burrs, and polishing treatment is needed.
Disclosure of Invention
The invention provides a crimping die, a metal connecting pipe and a crimping method for a conductor of a large-length submarine cable, which are used for solving the defects that the crimping mode in the prior art cannot form ideal section and appearance quality, and when workpieces with different pipe diameters are faced, the crimping part can be bent, so that the strength of the connecting part of the conductor is lower, and the electrical performance and mechanical performance of the crimping part cannot be ensured finally.
According to a first aspect of the present invention there is provided a long length submarine cable conductor crimping die comprising:
the support seat is provided with a crimping channel;
the first die set comprises a first die and a second die, the first die and the second die are respectively arranged on two opposite sides of the crimping channel, and the first die and the second die can be mutually close;
the second module comprises a third die and a fourth die, the third die and the fourth die are respectively arranged on two opposite sides of the crimping channel, and the third die and the fourth die can be mutually close;
the first die, the third die, the second die and the fourth die are uniformly distributed along the circumferential direction of the crimping passage, and one side of each side facing the crimping passage is provided with a crimping surface which is configured to be a plane.
According to the invention, the first module further comprises a first driving piece and a second driving piece, wherein the first driving piece is connected to the first die and can drive the first die to move towards the second die, and the second driving piece is connected to the second die and can drive the second die to move towards the first die.
According to the crimping die for the conductor of the large-length submarine cable, the first driving piece and the second driving piece are both hydraulic driving cylinders, and the first driving piece and the second driving piece are connected to the same hydraulic circuit.
According to the invention, the second module further comprises a third driving piece and a fourth driving piece, wherein the third driving piece is connected to the third die and can drive the third die to move towards the fourth die, and the fourth driving piece is connected to the fourth die and can drive the fourth die to move towards the third die.
According to the crimping die for the large-length submarine cable conductor, the first die, the second die, the third die and the fourth die are of long-strip-shaped structures, the cross sections of the long-strip-shaped structures in the axial direction perpendicular to the crimping channel are isosceles trapezoids, the long-strip-shaped structures comprise top surfaces and bottom surfaces which are parallel to each other, and the crimping surfaces of the first die, the second die, the third die and the fourth die are all arranged on the top surfaces.
According to a second aspect of the present invention, there is provided a metal connection pipe for connecting a cable using the cable conductor crimping die according to any one of the first aspect of the present invention, the metal connection pipe being in the shape of an elongated cylinder, both ends of the metal connection pipe being respectively provided with a first connection hole and a second connection hole, both extending in an axial direction of the metal connection pipe, between which is a solid structure.
According to the metal connecting pipe provided by the invention, the bottoms of the first connecting hole and the second connecting hole are both constructed to be in a plane structure perpendicular to the axial direction of the metal connecting pipe.
According to the metal connecting pipe provided by the invention, the diameters of the metal connecting pipes are the same along the axial direction, and the diameters of the first connecting hole and the second connecting hole are the same.
According to the present invention, there is provided a metal connection pipe including:
the first end pipe is provided with the first connecting hole;
the second end pipe is coincident with the axis of the first end pipe and fixedly connected with the first end pipe, a second connecting hole is formed in the second end pipe, the diameter of the second end pipe is larger than that of the first end pipe, and the diameter of the second connecting hole is larger than that of the first connecting hole.
According to a third aspect of the present invention, there is provided a crimping method using the large-length submarine cable conductor crimping die according to any one of the first aspect of the present invention, the crimping method comprising:
obtaining a conductor to be crimped, wherein the cut-off surface of the end part of the conductor to be crimped is smooth, the outer layer monofilament is not loose, and chamfering and polishing of the end are completed;
inserting the conductor to be crimped into a metal connecting pipe;
placing the metal connection pipe into which the conductor to be crimped is inserted into the crimp channel of a large-length submarine cable conductor crimping die according to any one of the first aspects of the invention;
fixing the metal connecting pipe by using a first module of the large-length submarine cable conductor crimping die, and crimping the metal connecting pipe and the conductor to be crimped at least twice by using a second module of the large-length submarine cable conductor crimping die, wherein the acting force of each crimping is gradually increased;
and fixing the metal connecting pipe by using the second module of the large-length submarine cable conductor crimping die, and crimping the metal connecting pipe and the conductor to be crimped at least twice by using the first module of the large-length submarine cable conductor crimping die, wherein the acting force of each crimping is gradually increased.
The invention provides a crimping die for a conductor of a long submarine cable, which comprises the following components: the support seat is provided with a crimping channel, a workpiece to be crimped can be placed in the crimping channel, and the first module and the second module can carry out crimping treatment on the workpiece to be crimped placed in the crimping channel. In the invention, the dies in the first die set and the second die set are both provided with the press-connection surfaces which are constructed to be planar, when the workpiece is pressed by the press-connection surfaces, the press-connection surfaces can press the workpiece in a planar contact mode, along with the increase of the pressing force, the stress at each position of the workpiece can be kept balanced, no matter the pipe diameter is large or small, no bending can be generated at the press-connection position due to the fact that the press-connection surfaces are planar, the structural strength of the conductor connection position can be ensured, the electrical performance and the mechanical performance of the press-connection position can be ensured finally, and the ideal section and the appearance quality can be formed.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural view of a long length submarine cable conductor crimping die in accordance with one embodiment of the invention;
FIG. 2 is a schematic view of a metal straight-through connection pipe in accordance with one embodiment of the present invention;
FIG. 3 is a schematic view showing the structure of a metal reducing connection pipe according to an embodiment of the present invention;
fig. 4 is a flow diagram of a crimping method for a large length submarine cable conductor crimping die in one embodiment according to the invention.
Reference numerals:
1. a support base; 2. a first mold; 3. a second mold; 4. a third mold; 5. a fourth die; 6. a first driving member; 7. a second driving member; 8. a third driving member; 9. a fourth driving member; 11. a metal straight-through connecting pipe; 12. and a metal reducing connecting pipe.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In one embodiment according to the present invention, there is provided a large-length submarine cable conductor crimping die including a support base having a crimping passage, a first die set and a second die set movable toward the crimping passage, a metal connection pipe, and a crimping method, the two die sets being capable of effectively crimping a crimping work placed in the crimping passage. The long-length submarine cable conductor crimping die, the metal connection pipe, and the crimping method in the present embodiment are further described below with reference to fig. 1 to 4.
Specifically, as shown in fig. 1, the long-length submarine cable conductor crimping die in the present embodiment includes: the support seat 1, a first module and a second module.
Wherein the supporting seat 1 is provided with a crimping passage.
It will be appreciated that the support base 1 may be constructed from a metal or the like, the support base 1 being capable of supporting the entire crimping die, a crimping passage being provided in the support base 1, in which crimping passage the conductor to be crimped and the metal connecting tube may be placed.
The first module comprises a first die 2 and a second die 3, the first die 2 and the second die 3 are respectively arranged on two opposite sides of the crimping channel, and the first die 2 and the second die 3 can be mutually close towards each other.
The second module comprises a third die 4 and a fourth die 5, the third die 4 and the fourth die 5 being arranged on opposite sides of the crimping passage, respectively, the third die 4 and the fourth die 5 being capable of being brought towards each other.
It will be appreciated that the first die 2, the third die 4, the second die 3 and the fourth die 5 are uniformly distributed along the circumferential direction of the crimping passage and are circumferentially arranged outside the crimping passage at intervals of 90 ° in sequence.
The first die 2 and the second die 3 can be brought close to each other to crimp the conductor to be crimped and the metal connection pipe placed in the crimping passage from opposite sides of the crimping passage. Similarly, the third die 4 and the fourth die 5 can also be brought close to each other and crimp the conductor to be crimped and the metal connection pipe placed in the crimp channel from opposite sides of the other direction of the crimp channel.
Further, the first die 2, the second die 3, the third die 4, and the fourth die 5 are each provided with a crimping face formed into a plane on a side facing the crimping passage, and the crimping faces of the four dies are each capable of abutting against a metal connection pipe placed in the crimping passage to perform crimping treatment on the metal connection pipe.
Alternatively, the respective press-contact surfaces of the first die 2 and the second die 3 are opposed and parallel to each other, and the respective press-contact surfaces of the third die 4 and the fourth die 5 are opposed and parallel to each other.
In practical use, when the conductor of the submarine cable with a large length needs to be crimped, the conductor to be crimped can be inserted into the metal connecting pipe, then the metal connecting pipe inserted with the conductor to be crimped is placed into the crimping channel of the supporting seat 1, then the metal connecting pipe is fixed by one group of dies in the first die set and the second die set, the metal connecting pipe is crimped by the other group of dies in the first die set and the second die set, and then the metal connecting pipe is fixed by the other group of dies in the first die set and the second die set, so that the metal connecting pipe is crimped by the former group of dies in the first die set and the second die set.
Optionally, the crimp faces of the four dies may be coated with a lubricant prior to the crimping process in order to reduce friction on each face and improve crimp efficiency.
In this embodiment, when the crimping process, the crimping face of all moulds in first module and second module can contact and extrude the metal connecting pipe gradually, because the crimping face of all moulds is the plane, can ensure that each extruded position receives even extrusion effort on the metal connecting pipe, makes wait to press the conductor and can evenly flow in the connecting hole, avoids producing overlap and burr, can guarantee simultaneously that the metal crimping pipe has enough intensity, avoids producing bending deformation when using. In addition, the crimping die can crimp metal connecting pipes with different pipe diameters, can not generate bending at the crimping part, and can ensure the structural strength of the connecting part of the conductor.
Further, in the present embodiment, in order to enable the first mold 2 and the second mold 3 to effectively move, as shown in fig. 1, the first module further includes a first driving member 6 and a second driving member 7, the first driving member 6 is connected to the first mold 2 and is capable of driving the first mold 2 to move toward the second mold 3, and the second driving member 7 is connected to the second mold 3 and is capable of driving the second mold 3 to move toward the first mold 2.
In actual use, after the metal connection pipe is placed in the crimping passage, the first driving member 6 and the second driving member 7 can respectively drive the first die 2 and the second die 3 to move toward the crimping passage, thereby performing crimping treatment on the metal connection pipe.
The first drive member 6 and the second drive member 7 are illustratively hydraulic drive cylinders, the first drive member 6 and the second drive member 7 being connected to the same hydraulic circuit.
It will be appreciated that by connecting the first and second driving members 6, 7 to the same hydraulic circuit, external hydraulic equipment can act on the first and second driving members 6, 7 via the same hydraulic circuit during the actual crimping process, it can be ensured that the first and second dies 2, 3 can apply the same force to the metal connecting pipe, thereby ensuring that the crimping is performed stably.
Similarly, the second module further comprises a third drive 8 and a fourth drive 9, the third drive 8 being connected to the third mould 4 and being able to drive the third mould 4 towards the fourth mould 5, the fourth drive 9 being connected to the fourth mould 5 and being able to drive the fourth mould 5 towards the third mould 4.
Thereby, after the metal connection pipe is placed in the crimping passage, the third driving member 8 and the fourth driving member 9 can drive the third die 4 and the fourth die 5 to move toward the crimping passage, respectively, thereby performing crimping treatment on the metal connection pipe.
In a specific embodiment, as shown in fig. 1, the first mold 2 and the second mold 3 may be disposed at left and right sides of the crimp channel, respectively, and the third mold 4 and the fourth mold 5 may be disposed at upper and lower sides of the crimp channel, respectively.
In the crimping process, the metal connection pipe placed in the crimping passage may be fixed from the upper and lower sides by the third die 4 and the fourth die 5, so that the first die 2 and the second die 3 simultaneously crimp the metal connection pipe from the left and right sides. After the left and right sides are pressed into place, the metal connecting pipe is fixed from the left and right sides by means of the first mold 2 and the second mold 3, and the third mold 4 and the fourth mold 5 are simultaneously pressed to the metal connecting pipe from the upper and lower sides.
In actual use, the third die 4 is located below the crimp channel, and therefore, the metal connection pipe may be placed therebetween on the third die 4. At this time, the third mold 4 may play a role of supporting the metal connection pipe.
Accordingly, for the preliminary positioning of the metal connecting tube, the position of the third mould 4 can be adjusted by the third drive 8. After that, the third die 4 can be kept at the current position, and the metal connection pipe can be crimped by moving the fourth die 5 downward only after the metal connection pipe is crimped from the upper and lower sides.
Further, four dies placed up, down, left and right are moved toward a metal connecting piece placed in a crimping passage when extruding a conductor to be crimped and a metal connecting pipe, in order to avoid interference of the four dies in the extrusion process, in this embodiment, as shown in fig. 1, the first die 2, the second die 3, the third die 4 and the fourth die 5 are each configured as a long strip structure, and the cross section in the axial direction perpendicular to the crimping passage is isosceles trapezoid, the long strip structure includes a top surface and a bottom surface which are parallel to each other, and the crimping surfaces of the first die 2, the second die 3, the third die 4 and the fourth die 5 are all disposed on the top surface.
It will be appreciated that in each die the top surface is the surface facing the side of the crimp channel, which is configured as a flat surface for the extruded metal connecting tube, and the bottom surface is the surface facing away from the side of the crimp channel, which is capable of connecting the driving member.
Since one side of each die close to the adjacent two dies is constructed as a waist of both sides of an isosceles trapezoid, the respective dies are not in contact with each other when the first die 2, the second die 3, the third die 4 and the fourth die 5 are co-operated to press the metal connection member in the actual press-bonding process.
As described above, in order to crimp the cable conductor in cooperation with the crimping die in the present embodiment, a metal connection pipe is also provided in the present embodiment.
Specifically, as shown in fig. 2 and 3, the metal connecting pipe is in a shape of a long cylinder, and a first connecting hole and a second connecting hole are respectively formed at two ends of the metal connecting pipe, and a solid structure is arranged between the first connecting hole and the second connecting hole.
In the actual crimping process, the conductor to be crimped may be inserted into the first connection hole and the second connection hole, respectively, and then the metal connection pipe into which the conductor to be crimped is inserted is crimped by means of the crimping die in the present embodiment.
Because the first connecting hole and the connecting hole in the metal connecting pipe are constructed into a solid structure, compared with the existing straight-through pipe, the solid structure can be used for positioning the splicing depth of the conductor to be crimped at first, and secondly, the solid structure can not generate extrusion deformation, so that the metal connecting pipe can keep enough structural strength, and the service life of the metal connecting pipe can be prolonged.
Further, the bottoms of the first and second connection holes are each constructed in a planar structure perpendicular to the axial direction of the metal connection pipe.
It can be understood that under the condition that the length of the metal pipe is fixed, the bottom of the connecting hole is set to be a plane structure, so that the thickness of the solid structure in the length direction of the metal pipe can be increased, the solid structure is ensured to have enough strength, the structural strength of the metal connecting pipe is improved, meanwhile, the conductor to be crimped can be fully inserted into the first connecting hole and the second connecting hole, and the conductor to be crimped is prevented from falling off from the first connecting hole and the second connecting hole after the crimping treatment is completed.
For example, in the first and second connection holes, the planar structure may be connected to inner walls of the first and second connection holes, respectively, by means of tapered structures.
In a specific embodiment, the diameters of the metal connection pipes are the same in the axial direction, and the diameters of the first connection holes and the second connection holes are the same. At this time, the metal connection pipe may be configured as a metal through connection pipe 11.
Specifically, as shown in fig. 2, the metal straight-through connection pipe 11 is generally configured in an elongated cylindrical structure having a uniform outer diameter. Moreover, the two ends of the metal straight-through connecting pipe 11 in the length direction are respectively provided with a first connecting hole and a second connecting hole which are round, and the middle of the metal straight-through connecting pipe is of a solid structure. Furthermore, the bottom of the connection hole is formed with a planar structure.
During the crimping process, the conductor to be crimped can be directly inserted into the connecting holes at the two ends of the metal straight-through connecting pipe 11, and then the metal straight-through connecting pipe inserted with the conductor to be crimped is placed into a crimping die for crimping.
Alternatively, the total length of the metal straight-through connection pipe 11 is 100mm, and the length A1 of the center of the metal straight-through connection pipe 11 configured as a solid area is 20mm, that is, the distance between two planar structures in two connection holes in the axial direction of the metal straight-through connection pipe 11 is 20mm. The wall thickness B1 of a first connecting hole at one end of the metal straight-through connecting pipe is 2mm, the wall thickness C1 of a second connecting hole at the other end is 2mm, and the inner diameters R1 of the two connecting holes are 30mm.
Of course, in practical applications, the wall thickness of the two ends of the metal straight-through connection pipe 11 can be selected according to different conductor structures, so that the connection pipe and the conductor can bear larger tensile force after being crimped.
In yet another specific embodiment, the metal connection pipe includes: a first end tube and a second end tube. Wherein, the first end pipe is provided with a first connecting hole; the second end pipe coincides with the axis of the first end pipe and is fixedly connected with the first end pipe, and a second connecting hole is formed. The diameter of the second end pipe is larger than that of the first end pipe, and the diameter of the second connecting hole is larger than that of the first connecting hole. At this time, the metal connection pipe may be configured as a metal variable diameter connection pipe 12.
Specifically, as shown in fig. 3, the metal reducing connecting pipe 12 is generally configured as an elongated cylinder, and the first end pipe of the elongated cylinder structure has a smaller outer diameter and the second end pipe has a larger outer diameter. The first end pipe with smaller outer diameter is provided with a first connecting hole with smaller inner diameter, the second end pipe with larger outer diameter is provided with a second connecting hole with larger inner diameter, and the joint between the first connecting hole and the second connecting hole is of a solid structure. On the circumferential outer surface, the first end pipe and the second end pipe are connected via a tapered surface structure L.
Alternatively, the angle between the generatrix of the conical surface structure L and the generatrix of the outer surface of one of the tubes is 135 degrees.
In the crimping process, the conductor to be crimped can be directly inserted into the connecting holes at the two ends of the metal reducing connecting pipe 12, and then the metal reducing connecting pipe inserted with the conductor to be crimped is placed into a crimping die for crimping.
In a specific embodiment, the total length of the metal variable diameter connection pipe 12 is 120mm, and the length A2 of the center of the metal variable diameter connection pipe, which is configured as a solid structure, is 30mm, i.e., the distance between two planar structures in the two connection holes in the axial direction of the metal variable diameter connection pipe 12 is 30mm. The wall thickness C2 of the first connecting hole of the first end with smaller outer diameter of the metal reducing connecting pipe is 2mm, the wall thickness B2 of the second connecting hole of the second end with larger outer diameter is 2mm, the inner diameter R2 of the first connecting hole of the first end with smaller outer diameter is 20mm, and the inner diameter R3 of the second connecting hole of the second end with larger outer diameter is 30mm.
Of course, in practical applications, the wall thickness of the two ends of the metal reducing connecting pipe 12 can be selected according to different conductor structures, so that the connecting pipe and the conductor can bear larger tensile force after being crimped.
As described above, there is also provided in the present embodiment a crimping method for the above-described crimping die for a long-length submarine cable conductor.
Specifically, as shown in fig. 4, the crimping method in the present embodiment includes:
s1: obtaining a conductor to be crimped, wherein the cut-off surface of the end part of the conductor to be crimped is smooth, the outer layer monofilament is not loose, and chamfering and polishing of the end are completed;
s2: inserting the conductor to be crimped into a metal connecting pipe;
s3: placing the metal connection pipe, into which the conductor to be crimped is inserted, into the crimping passage of the large-length submarine cable conductor crimping die as in the present embodiment;
s4: fixing the metal connecting pipe by using a first module of the large-length submarine cable conductor crimping die, and crimping the metal connecting pipe and the conductor to be crimped at least twice by using a second module of the large-length submarine cable conductor crimping die, wherein the acting force of each crimping is gradually increased;
s5: and fixing the metal connecting pipe by using the second module of the large-length submarine cable conductor crimping die, and crimping the metal connecting pipe and the conductor to be crimped at least twice by using the first module of the large-length submarine cable conductor crimping die, wherein the acting force of each crimping is gradually increased.
Specifically, in S1, a layer of strong adhesive tape can be wrapped at the end of the conductor to be crimped, the band saw is used to saw the conductor to be crimped from the middle of the strong adhesive tape, the cut surface of the conductor is smooth, the outer layer monofilaments are not loose, and the end of the conductor is polished and chamfered.
In S2, the conductor to be crimped after the completion of the processing in S1 may be inserted into the connection hole of the metal connection pipe.
In S3, the metal connection pipe inserted with the conductor to be crimped in S2 is placed in the crimping passage of the support in the present embodiment, and for example, the metal connection pipe may be placed directly on the third die 4.
In S4, the metal connection pipe may be fixed from the upper and lower sides by the third mold 4 and the fourth mold 5, and then the metal connection pipe may be pressure-bonded by the first mold 2 and the second mold 3 from the left and right sides. At the time of crimping, the first die 2 and the second die 3 may be allowed to press the metal connection pipe a plurality of times, and the force of each crimping gradually increases.
In S5, the metal connection pipe may be fixed from both left and right sides by the first mold 2 and the second mold 3, and then the metal connection pipe may be pressure-bonded by the third mold 4 and the fourth mold 5 from both upper and lower sides. At the time of crimping, the third die 4 and the fourth die 5 may be allowed to press the metal connection pipe a plurality of times, and the force of each crimping gradually increases.
Further, in the crimping method, S1 further includes:
selecting a metal straight-through connecting pipe or a metal reducing connecting pipe according to requirements;
when the metal straight-through connecting pipe is selected, drawing marks corresponding to the reserved length of the extrusion position on the surface of the metal straight-through connecting pipe; when the metal reducing connecting pipe is selected, drawing marks corresponding to the depth of the connecting holes on the surface of the metal reducing connecting pipe;
drawing marks corresponding to the plugging depth on the surface of the cable conductor;
when the cable conductor is inserted into the connecting hole of the metal connecting pipe, the mark on the cable conductor is flush with the hole opening of the connecting hole on the metal connecting pipe.
And carrying out crimping treatment on the metal connecting pipe in a crimping die according to the mark on the metal straight-through connecting pipe or the mark on the metal reducing connecting pipe.
In a specific embodiment, when it is desired to crimp together a long length of submarine cable conductor with a metallic connecting tube, the following steps may be taken:
selecting materials: the metal straight-through connecting pipe or the metal reducing connecting pipe is selected according to the use requirement, the size of the connecting pipe and the outer diameter of the cable conductor are matched, and meanwhile, an appropriate crimping die is selected according to the outer diameter of the cable conductor.
It can be understood that the success rate of crimping can be improved through reasonable die matching, and the whole structure can be ensured to have enough strength after crimping, so that the surface quality of the connecting pipe is better.
Preparation: when the metal straight-through connecting pipe is selected, a mark point corresponding to the depth of the end connecting hole can be drawn on the outer surface of the metal variable-diameter connecting pipe, and when the metal straight-through connecting pipe is selected, a mark point corresponding to a reserved length can be drawn on the outer surface of the metal straight-through connecting pipe, for example, the distance between the mark point and the orifice of the connecting hole is about 5mm;
moreover, it is also necessary to draw mark points corresponding to the insertion depths of the connection holes on the outer surface of the cable conductor;
the cable conductor to be crimped is inserted into the connecting hole of the metal connecting pipe, so that mark points on the cable conductor are flush with the orifice of the connecting hole, the conductor can be completely embedded into the connecting hole after being crimped, and the crimping success rate and the strength of the metal connecting pipe after being crimped are ensured.
Crimping: placing the metal connecting pipe inserted with the cable conductor into a crimping channel of the supporting seat, and positioning the crimping position through marking points on the metal connecting pipe;
specifically, the metal connecting pipe can be fixed by the first die 2 and the second die 3 from the left side and the right side, the metal connecting pipe is crimped by the third die 4 and the fourth die 5 from the upper side and the lower side, wherein the third driving piece 8 is a hydraulic driving cylinder, when the hydraulic pump pressure gauge pressure corresponding to the hydraulic driving cylinder is 80bar, the metal connecting pipe is loosened, the position of the metal connecting pipe is adjusted, the metal connecting pipe moves forwards by 1-2 mm relative to the dies in a crimping channel, the dies can extrude the orifice position of the metal connecting pipe, which is closer to a connecting hole, the metal connecting pipe is fixed by the first die 2 and the second die 3 from the left side and the right side, the metal connecting pipe is crimped by the third die 4 and the fourth die 5 from the upper side and the lower side, the extrusion degree is from small to large, and the pressure gauge pressure of the hydraulic pump is more than 350 bar;
then, the metal connection pipe is fixed from the upper and lower sides by the third die 4 and the fourth die 5, and the metal connection pipe is extruded from the left and right sides by the first die 2 and the second die 3, and the pressure bonding manner of the first die 2 and the second die 3 is the same as that of the third die 4 and the fourth die 5.
In practical use, the specific number of crimping times of the die is determined according to the cross section of the cable conductor, and the larger the cross section of the cable conductor is, the more the number of crimping times can be.
And finally, checking the crimped metal connecting pipe, and determining that the metal connecting pipe is free from cracking and breakage, so that the outer diameter of the metal connecting pipe is slightly smaller than the diameter of the cable conductor, and the crimping quality is good.
In one embodiment, the cable conductor and the metal connection tube to be crimped may be die-fitted in the following manner:
the inner diameter of the metal connecting pipe is selected:
when the cross section of the cable conductor is 1000mm 2 When the section is below, the inner diameter D+1.0mm of the connecting hole in the metal connecting pipe;
when the cross section of the cable conductor is 1000mm 2 When the section is equal to or more than the section, the inner diameter D+2.0mm of the connecting hole in the metal connecting pipe;
it will be appreciated that D is the outer diameter of the cable conductor when the cable conductor has a cross section of 1000mm 2 When the cross section is below the cross section, the inner diameter of the connecting hole in the metal connecting pipe needs to be 1.0mm larger than the outer diameter of the cable conductor, and when the cross section of the cable conductor is 1000mm 2 When the section is equal to or more than the section, the inner diameter of the connecting hole in the metal connecting pipe needs to be 2.0mm larger than the outer diameter of the cable conductor.
Selecting the wall thickness of the metal connecting pipe:
when the cross section of the cable conductor is 1000mm 2 When the section is below, the wall thickness of the metal connecting pipe is 2.0mm;
when the cross section of the cable conductor is 1000mm 2 When the section is equal to or more than the section, the wall thickness of the metal connecting pipe is 2.5mm.
It will be appreciated that when poweredThe cable conductor has a cross section of 1000mm 2 The wall thickness of the connecting hole in the metal connecting pipe is 2.0mm below the section, and the section of the cable conductor is 1000mm 2 When the section is equal to or more than the section, the wall thickness of the connecting hole in the metal connecting pipe is 2.5mm.
By adopting the die matching and crimping method, the crimping efficiency can be improved by 20-30%, so that the connecting pipe can be crimped in time, and continuous and stable production of the long-length submarine cable crosslinking process is ensured. Moreover, by the crimping method and the die matching method in the embodiment, the crimping efficiency and the success rate can be improved, the crimping strength is ensured to meet the requirement, and the connecting pipe can bear the tensile force of at least 180kN after crimping.
Thus, the long-length submarine cable conductor crimping die in the present embodiment has the following advantages:
the long submarine cable conductor crimping die in this embodiment includes: the support seat is provided with a crimping channel, a workpiece to be crimped can be placed in the crimping channel, and the first module and the second module can carry out crimping treatment on the workpiece to be crimped placed in the crimping channel. In the invention, the dies in the first die set and the second die set are both provided with the press-connection surfaces which are constructed to be planar, when the workpiece is pressed by the press-connection surfaces, the press-connection surfaces can press the workpiece in a planar contact mode, along with the increase of the pressing force, the stress at each position of the workpiece can be kept balanced, no matter the pipe diameter is large or small, no bending can be generated at the press-connection position due to the fact that the press-connection surfaces are planar, the structural strength of the conductor connection position can be ensured, the electrical performance and the mechanical performance of the press-connection position can be ensured finally, and the ideal section and the appearance quality can be formed.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A large-length submarine cable conductor crimping die, comprising:
the support seat is provided with a crimping channel;
the first die set comprises a first die and a second die, the first die and the second die are respectively arranged on two opposite sides of the crimping channel, and the first die and the second die can be mutually close;
the second module comprises a third die and a fourth die, the third die and the fourth die are respectively arranged on two opposite sides of the crimping channel, and the third die and the fourth die can be mutually close;
the first die, the third die, the second die and the fourth die are uniformly distributed along the circumferential direction of the crimping passage, and one side of each side facing the crimping passage is provided with a crimping surface which is configured to be a plane.
2. The long length submarine cable conductor crimping die of claim 1, wherein the first module further comprises a first drive piece and a second drive piece, the first drive piece being connected to the first die and capable of driving the first die toward the second die, the second drive piece being connected to the second die and capable of driving the second die toward the first die.
3. The long length submarine cable conductor crimping die of claim 2, wherein the first drive piece and the second drive piece are both hydraulic drive cylinders, the first drive piece and the second drive piece being connected to the same hydraulic circuit.
4. The long length submarine cable conductor crimping die of claim 1, wherein the second module further comprises a third drive piece and a fourth drive piece, the third drive piece connected to and capable of driving the third die toward the fourth die, the fourth drive piece connected to and capable of driving the fourth die toward the third die.
5. The long-length submarine cable conductor crimping die according to claim 1, wherein the first die, the second die, the third die and the fourth die are each of a long-strip-shaped structure, and the cross section in the axial direction perpendicular to the crimping passage is of an isosceles trapezoid shape, the long-strip-shaped structure includes a top face and a bottom face that are parallel to each other, and the crimping faces of the first die, the second die, the third die and the fourth die are each provided on the top face.
6. A metal connecting pipe, characterized in that the metal connecting pipe is used for connecting a cable by using the cable conductor crimping die according to any one of claims 1 to 5, the shape of the metal connecting pipe is a long-strip cylinder, a first connecting hole and a second connecting hole are respectively formed at two ends of the metal connecting pipe, the first connecting hole and the second connecting hole extend along the axial direction of the metal connecting pipe, and a solid structure is arranged between the first connecting hole and the second connecting hole.
7. The metal connection pipe according to claim 6, wherein the bottom of the first connection hole and the bottom of the second connection hole are each configured in a planar structure perpendicular to the axial direction of the metal connection pipe.
8. The metal connection pipe according to claim 6, wherein diameters of the metal connection pipe are the same in the axial direction thereof, and diameters of the first connection hole and the second connection hole are the same.
9. The metal connection pipe according to claim 6, wherein the metal connection pipe comprises:
the first end pipe is provided with the first connecting hole;
the second end pipe is coincident with the axis of the first end pipe and fixedly connected with the first end pipe, a second connecting hole is formed in the second end pipe, the diameter of the second end pipe is larger than that of the first end pipe, and the diameter of the second connecting hole is larger than that of the first connecting hole.
10. A crimping method using the cable conductor crimping die according to any one of claims 1 to 5, characterized by comprising:
obtaining a conductor to be crimped, wherein the cut-off surface of the end part of the conductor to be crimped is smooth, the outer layer monofilament is not loose, and chamfering and polishing of the end are completed;
inserting the conductor to be crimped into a metal connecting pipe;
placing the metal connection pipe into which the conductor to be crimped is inserted into the crimping passage of the large-length submarine cable conductor crimping die according to any one of claims 1 to 5;
fixing the metal connecting pipe by using a first module of the large-length submarine cable conductor crimping die, and crimping the metal connecting pipe and the conductor to be crimped at least twice by using a second module of the large-length submarine cable conductor crimping die, wherein the acting force of each crimping is gradually increased;
and fixing the metal connecting pipe by using the second module of the large-length submarine cable conductor crimping die, and crimping the metal connecting pipe and the conductor to be crimped at least twice by using the first module of the large-length submarine cable conductor crimping die, wherein the acting force of each crimping is gradually increased.
CN202311571418.3A 2023-11-22 2023-11-22 Crimping die, metal connecting pipe and crimping method for conductor of large-length submarine cable Pending CN117374692A (en)

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CN202311571418.3A CN117374692A (en) 2023-11-22 2023-11-22 Crimping die, metal connecting pipe and crimping method for conductor of large-length submarine cable

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Application Number Priority Date Filing Date Title
CN202311571418.3A CN117374692A (en) 2023-11-22 2023-11-22 Crimping die, metal connecting pipe and crimping method for conductor of large-length submarine cable

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CN117374692A true CN117374692A (en) 2024-01-09

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