A crosslinked polyethylene insulated cable of the tension type

Abstract

The application relates to the technical field of crosslinked polyethylene insulated cables, and proposes a tension type crosslinked polyethylene insulated cable which comprises a plurality of metal conductors provided with insulating layers, an insulating cylinder layer arranged between the outer sides of the plurality of metal conductors, a fastening ring sleeve and a bucket type connecting sleeve, the fastening ring sleeve is sleeved on the outer side of the insulating cylinder layer and is used for fastening the broken insulating cylinder layer, the plurality of metal conductors all extend into the bucket type connecting sleeve, and a flexible wrapping structure which can bend is arranged in communication between the bucket type connecting sleeve and the fastening ring sleeve, the flexible wrapping structure is used for wrapping the metal conductors and adapting to the connection angle of the metal conductors and power equipment. Through the technical scheme, the problem that the metal conductors are loose and the electrical connection between the metal conductors and the power equipment is unstable when the plurality of metal conductors of the crosslinked polyethylene insulated cable in the prior art are respectively electrically connected with a plurality of electrical equipment is solved.

Description

Technical Field

[0001] This invention relates to the field of cross-linked polyethylene insulated cable technology, and more specifically, to a tensioned cross-linked polyethylene insulated cable. Background Technology

[0002] Cross-linked polyethylene (XLPE) insulated cables are common cables for transmitting electrical energy in existing technology. Their processing feature is that a layer of XLPE insulation is processed on the outside of the metal conductor using an extrusion process to ensure the insulation of the metal conductor. Therefore, XLPE insulated cables have good thermomechanical and electrical properties, as well as good corrosion resistance. XLPE insulated cables are made by stranding multiple metal conductors with extruded XLPE insulation layers together.

[0003] In existing cross-linked polyethylene (XLPE) insulated cables, the outermost insulating layer is broken during use, allowing multiple metal conductors to be distributed and electrically connected to different electrical devices. While all metal conductors are of uniform length, the distances between them and the electrical devices vary. Therefore, when connecting closely spaced conductors to electrical devices, the conductors may become loose. Cutting the conductors is an irreversible process. Consequently, due to this looseness, existing XLPE insulated cables are prone to unstable electrical connections with electrical equipment. Summary of the Invention

[0004] This invention proposes a tensioned cross-linked polyethylene insulated cable, which solves the problem in the prior art where multiple metal conductors of cross-linked polyethylene insulated cables are electrically connected to multiple electrical devices, and the electrical connection between the metal conductors and the electrical devices is unstable due to the loosening of the metal conductors.

[0005] The technical solution of the present invention is as follows: A tensioned cross-linked polyethylene insulated cable includes multiple metal conductors with insulating layers, an insulating sleeve layer is disposed between the outer sides of the multiple metal conductors, and further includes:

[0006] A fastening ring sleeve is sleeved on the outside of the insulating cylinder layer to fasten the broken insulating cylinder layer;

[0007] A bucket-shaped connecting sleeve is provided, in which multiple metal conductors extend into the bucket-shaped connecting sleeve. A flexible wrapping structure is provided between the bucket-shaped connecting sleeve and the fastening ring sleeve. The flexible wrapping structure is used to wrap the metal conductors and adapt to the connection angle between the metal conductors and the power equipment.

[0008] A protective housing is provided, with one side of the bucket-shaped connecting sleeve connected to the protective housing. The metal conductor passes through the protective housing and is connected to the power equipment. A conductor fixing bracket is provided inside the protective housing. One of the metal conductors passes through the middle of the conductor fixing bracket, and the remaining multiple metal conductors are arranged circumferentially around the conductor fixing bracket. The metal conductors and the conductor fixing bracket are provided with a conductor tensioning structure.

[0009] To provide insulation protection for the metal conductor, the flexible wrapping structure further includes a connecting ring sleeve and a flexible wrapping cylinder. The connecting ring sleeve is fixedly connected to the end of both the fastening ring sleeve and the bucket-shaped connecting sleeve. The connecting ring sleeve is provided with multiple arc-shaped connecting slots. Rigid inserts are provided on both sides of the flexible wrapping cylinder. The rigid inserts extend into and connect to the multiple arc-shaped connecting slots located on the same side. The metal conductor extends into the flexible wrapping cylinder.

[0010] To further restrict the position of the metal conductors within the bucket-shaped connecting sleeve, a circular sealing plate is fixedly connected inside the bucket-shaped connecting sleeve. One of the metal conductors passes through the middle of the circular sealing plate, and a conical flexible cylinder is connected to the circumference of the circular sealing plate. The remaining multiple metal conductors all pass through the conical flexible cylinder.

[0011] To further secure the metal conductor during electrical connection, the conductor fixing bracket includes a fixing cylinder and U-shaped support frames. The fixing cylinder is connected to the middle of the circular sealing plate and penetrates the protective housing. One of the metal conductors penetrates the fixing cylinder. Multiple U-shaped support frames are fixedly connected to the circumference of the fixing cylinder, and the U-shaped support frames are located inside the protective housing.

[0012] To keep the long metal conductor taut, the conductor tensioning structure further includes a cylindrical fixing member, a support plate, and a clamp-shaped metal member. The metal conductor passes through the cylindrical fixing member. Two deformable metal bending members are provided between the support plate and the U-shaped support frame. The two metal bending members are interlaced. The deformable clamp-shaped metal member is provided between the cylindrical fixing member and the support plate.

[0013] To further connect the clamp-type metal part to the metal conductor, the cylindrical fixing part includes a flexible insulating sleeve and a fixing ring. The flexible insulating sleeve is sleeved on the outside of the metal conductor, and multiple tension grooves are formed on the inner circumference of the flexible insulating sleeve. The fixing ring is provided on the outside of the flexible insulating sleeve.

[0014] To limit the movement distance of the support piece, one of the metal bending parts is further provided with a sheet-like protrusion at the top, and the other metal bending part is provided with a fork-like protrusion at the top. Both the sheet-like protrusion and the fork-like protrusion are fixedly connected to the support piece, and the sheet-like protrusion is located inside the fork-like protrusion.

[0015] In order to allow the clamp-type metal part to deform and adapt to changes in the connection angle of the metal conductor when the metal conductor moves, the clamp-type metal part is further provided with connecting end faces at both the top and bottom, and the two connecting end faces are respectively fixedly connected to the fixing ring and the support piece.

[0016] To accommodate the positional changes of the metal conductor within the protective housing when it is connected to the power equipment, the protective housing is further provided with multiple rectangular slots for the metal conductor to move out.

[0017] The working principle and beneficial effects of this invention are as follows:

[0018] In this invention, when multiple metal conductors need to be electrically connected to multiple electrical devices at different locations, in order to accommodate the differences in the spacing between different metal conductors and electrical devices at different locations, in actual operation, one side of the insulating cylinder layer is first broken open to expose multiple metal conductors wrapped with insulating layers. The broken side of the insulating cylinder layer is fixed by a fastening ring to prevent the broken part of the insulating cylinder layer from expanding. Then, the metal conductors are passed through the bucket-shaped connecting sleeve and inserted into the cylindrical fixing member inside the protective shell, so that the metal conductors move to the outside of the protective shell. The length of the metal conductors extending out of the protective shell is controlled by the contractile property of the conductor tensioning structure. By pulling the position of the metal conductors inside the protective shell, the metal conductors are kept sufficiently tensioned after being connected to the electrical devices. Under the premise of not needing to excessively cut the metal conductors to shorten their length, the metal conductors are kept sufficiently tensioned after being electrically connected to the electrical devices. Attached Figure Description

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a partial cross-sectional structural schematic diagram of the present invention;

[0022] Figure 3 This is an exploded structural diagram showing the fit between the bucket-shaped connecting sleeve, connecting ring sleeve, arc-shaped connecting groove, flexible wrapping cylinder, and rigid insert ring of the present invention.

[0023] Figure 4This is a schematic diagram of the structure of the fixed support cylinder, U-shaped support frame, support plate, metal bending part, clamp-shaped metal part and flexible insulating sleeve in this invention;

[0024] Figure 5 This is an exploded structural diagram showing the assembly of the U-shaped support frame, support plate, metal bending component, clamp-shaped metal component, and flexible insulating sleeve in this invention.

[0025] Figure 6 This is a schematic diagram of the planar structure of the protective shell, metal conductor, and support plate in this invention.

[0026] In the diagram: 1. Metal conductor; 2. Insulating cylinder layer; 3. Fastening ring; 4. Bucket-shaped connecting sleeve; 5. Protective shell; 6. Connecting ring; 7. Arc-shaped connecting groove; 8. Flexible wrapping cylinder; 9. Rigid insert ring; 10. Circular sealing plate; 11. Conical flexible cylinder; 12. Fixed support cylinder; 13. U-shaped support frame; 14. Support plate; 15. Metal bending part; 16. Clamp-type metal part; 17. Flexible insulating sleeve; 18. Tension groove; 19. Fixed ring; 20. Sheet-shaped protrusion; 21. Fork-shaped protrusion; 22. Connecting end face; 23. Rectangular slot. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] like Figures 1 to 6 As shown, this embodiment proposes a tensioned cross-linked polyethylene insulated cable, including multiple metal conductors 1 with insulation layers. An insulating sleeve layer 2 is provided between the outer sides of the multiple metal conductors 1. The insulation layers on the outer sides of the metal conductors 1 are all made of cross-linked polyethylene material through an extrusion process, which is used to protect and insulate the metal conductors 1. In actual use, the insulation layer peels off at the connection between the metal conductors 1 and the power equipment, exposing the metal wire part of the metal conductors 1. The insulating sleeve layer 2 is divided into two types: plastic material and rubber material, which are used to protect and insulate the internal metal conductors 1.

[0029] It also includes a fastening ring 3, which is fitted on the outside of the insulating cylinder layer 2 to fasten the broken insulating cylinder layer 2. When it is necessary to make an electrical connection between multiple metal conductors 1 and the corresponding power equipment, the outermost insulating cylinder layer 2 needs to be broken first to expose multiple metal conductors 1 wrapped with insulation layers. Then, the rigid fastening ring 3 is fitted on the broken part of the insulating cylinder layer 2 to fasten the broken part of the insulating cylinder layer 2 to prevent the broken part of the insulating cylinder layer 2 from expanding further.

[0030] Multiple metal conductors 1 extend into the bucket-shaped connecting sleeve 4. A flexible wrapping structure is provided between the bucket-shaped connecting sleeve 4 and the fastening ring sleeve 3. This flexible wrapping structure is used to wrap the metal conductors 1 and adapt to the connection angle between the metal conductors 1 and the power equipment. The flexible wrapping structure includes a connecting ring sleeve 6 and a flexible wrapping cylinder 8. Connecting ring sleeves 6 are fixedly connected to the adjacent ends of the fastening ring sleeve 3 and the bucket-shaped connecting sleeve 4. Multiple arc-shaped connecting grooves 7 are provided on the connecting ring sleeve 6. Rigid inserts 9 are provided on both sides of the flexible wrapping cylinder 8. The rigid inserts 9 extend into and connect to the multiple arc-shaped connecting grooves 7 located on the same side. The metal conductors 1 extend into the flexible wrapping cylinder 8. At the connection between the insulated cable and the power equipment... When the connection points between the devices are perpendicular to each other, because the insulating cylinder layer 2 has a certain weight, if an electrical connection is made between the metal conductor 1 and the power equipment, one side of the insulating cylinder layer 2 will be lifted up. The connection point between the metal conductor 1 and the power equipment also needs to bear part of the weight of the insulating cylinder layer 2. Therefore, it is easy for the connection between the metal conductor 1 and the power equipment to be unstable. However, in the use of this invention, under the action of the flexible wrapping structure, the operator can remove more of the insulating cylinder layer 2 and use the flexible wrapping structure to protect the metal conductor 1. In addition, the flexible wrapping structure can be bent at a larger angle, improving the flexibility of the metal conductor 1 during the connection process.

[0031] During use, starting from the break in the insulating cylinder layer 2, the distance between the bucket-shaped connecting sleeve 4 and the fastening ring sleeve 3 is adjusted according to the distance between the multiple metal conductors 1 and the power equipment. Then, based on the distance between the bucket-shaped connecting sleeve 4 and the fastening ring sleeve 3, a flexible wrapping cylinder 8 of corresponding length is selected. The rigid inserts 9 on both sides of the flexible wrapping cylinder 8 are inserted into the multiple arc-shaped connecting slots 7 on both sides. Threaded grooves are correspondingly opened on the arc-shaped connecting slots 7 and the rigid inserts 9. Bolts are used to connect the arc-shaped connecting slots 7 and the rigid inserts 9, so that the flexible wrapping cylinder 8 protects the metal conductors 1. The flexible wrapping cylinder 8 can be effectively bent, so that when the metal conductors 1 bend, the flexible wrapping cylinder 8 can protect the bending of the metal conductors 1.

[0032] A circular sealing plate 10 is fixedly connected inside the bucket-shaped connecting sleeve 4. One metal conductor 1 passes through the middle of the circular sealing plate 10. A conical flexible cylinder 11 is connected around the circumference of the circular sealing plate 10. The remaining metal conductors 1 all pass through the conical flexible cylinder 11. The multiple metal conductors 1 are electrically connected to different electrical equipment. A metal conductor 1 with a distance length close to that between an electrical equipment and the insulating cylinder layer 2 passes through the middle of the circular sealing plate 10. This metal conductor 1 can maintain sufficient tension without a conductor tensioning structure. The remaining metal conductors 1 pass through the corresponding conical flexible cylinder 11. The conical flexible cylinder 11 can restrict the metal conductor 1 after a large angular displacement, preventing the metal conductor 1 from moving arbitrarily.

[0033] One side of the bucket-shaped connecting sleeve 4 is connected to the protective shell 5. The metal conductor 1 passes through the protective shell 5 and is connected to the power equipment. The conductor fixing bracket is provided inside the protective shell 5. The conductor fixing bracket includes a fixing cylinder 12 and a U-shaped support frame 13. The fixing cylinder 12 is connected to the middle of the circular sealing plate 10. The fixing cylinder 12 passes through the protective shell 5. One of the metal conductors 1 passes through the fixing cylinder 12. Multiple U-shaped support frames 13 are fixedly connected to the circumference of the fixing cylinder 12. The U-shaped support frame 13 is located inside the protective shell 5. The metal conductor 1 with the closest distance between the insulating cylinder layer 2 and one of the power equipment is extended into the fixing cylinder 12. The metal conductor 1 is used as the peeling reference length of the insulating cylinder layer 2. The U-shaped support frame 13 can effectively support the protective shell 5 and prevent the protective shell 5 from deforming during use.

[0034] One of the metal conductors 1 passes through the middle of the conductor fixing bracket, and the remaining multiple metal conductors 1 are arranged circumferentially around the conductor fixing bracket. The metal conductors 1 and the conductor fixing bracket are provided with a conductor tensioning structure, which includes a cylindrical fixing member, a support plate 14 and a clamp-shaped metal member 16. The metal conductor 1 passes through the cylindrical fixing member. Two deformable metal bending members 15 are provided between the support plate 14 and the U-shaped support frame 13. The two metal bending members 15 are interlaced. The deformable clamp-shaped metal member 16 is provided between the cylindrical fixing member and the support plate 14. The metal conductor 1 is passed through the cylindrical fixing member and then extended from the protective shell 5. According to the difference between the length of the metal conductor 1 and the distance between the insulating cylinder layer 2 and the power equipment, the two metal bending members 15 are deformed to adjust the position of the support plate 14 in the U-shaped support frame 13 so that the metal conductor 1 is kept taut.

[0035] The cylindrical fastener includes a flexible insulating sleeve 17 and a fixing ring 19. The flexible insulating sleeve 17 is sleeved on the outside of the metal conductor 1. Multiple tension grooves 18 are opened on the inner circumference of the flexible insulating sleeve 17. The fixing ring 19 is provided on the outside of the flexible insulating sleeve 17. In actual use, the metal conductor 1 is passed through the flexible insulating sleeve 17 to provide a connection between the metal conductor 1 and the support piece 14. The tension grooves 18 are opened to reduce the friction force of the metal conductor 1 entering the flexible insulating sleeve 17. The fixing ring 19 is provided to facilitate connection with the clamp-type metal part 16.

[0036] One of the metal bending components 15 has a plate-like protrusion 20 at its top, and the other metal bending component 15 has a fork-like protrusion 21 at its top. Both the plate-like protrusion 20 and the fork-like protrusion 21 are fixedly connected to the support plate 14. The plate-like protrusion 20 is located inside the fork-like protrusion 21. In order to keep the metal conductor 1 taut, when the two metal bending components 15 are in their normal state, the support plate 14 and a part of the metal conductor 1 are pulled towards the fixed support cylinder 12. When it is necessary to connect the metal conductor 1, the metal conductor 1 needs to be moved from inside the protective housing 5 to the outside. At this time, the metal bending component is pulled. The deformation of component 15 allows more of the metal conductor 1 to move out of the protective shell 5. The interlaced arrangement of the sheet-like protrusions 20 and the fork-like protrusions 21 limits the compression deformation distance of the two metal bending components 15 towards the fixed support cylinder 12. When the metal bending component 15 deforms excessively, the sheet-like protrusions 20 will contact the inner wall of the fork-like protrusions 21 on the side near the fixed support cylinder 12, thereby stopping the deformation of the two metal bending components 15. In the event that the protective shell 5 is damaged and the metal conductor 1 is squeezed, the two metal bending components 15 can effectively buffer and protect the metal conductor 1.

[0037] The top and bottom of the clamp-type metal part 16 are provided with connecting end faces 22. The two connecting end faces 22 are fixedly connected to the fixing ring 19 and the support piece 14 respectively. After the clamp-type metal part 16 is fixedly connected between the fixing ring 19 and the support piece 14, when it is necessary to move more of the metal conductor 1 out of the protective housing 5, the clamp-type metal part 16 can also deform when the metal bending part 15 has maintained the maximum deformation state, so as to adjust the removal length of the metal conductor 1.

[0038] The protective housing 5 has multiple rectangular slots 23 for the metal conductor 1 to move out. The metal conductor 1 moves out of the protective housing 5 through the rectangular slots 23. The rectangular slots 23 can provide a larger moving area for the metal conductor 1, making it easier to keep the metal conductor 1 taut.

[0039] The working principle of this tensioned cross-linked polyethylene insulated cable:

[0040] First, one side of the insulating cylinder layer 2 is broken open to expose multiple metal conductors 1 wrapped with insulating layers. The broken side of the insulating cylinder layer 2 is fixed by the fastening ring 3 to prevent the broken part of the insulating cylinder layer 2 from expanding. Then, the metal conductors 1 are passed through the bucket-shaped connecting sleeve 4 and extended into the protective housing 5. The metal conductor 1 with the closest distance between the insulating cylinder layer 2 and one of the electrical devices is extended into the fixed support cylinder 12. Using this metal conductor 1 as the peeling reference length of the insulating cylinder layer 2, the remaining multiple metal conductors 1 are passed through the cylindrical fixing member. Then, the metal conductors 1 are extended out of the protective housing 5. According to the difference between the length of the metal conductor 1 and the distance between the insulating cylinder layer 2 and the electrical device, the two metal bending members 15 are deformed to adjust the position of the support piece 14 in the U-shaped support frame 13 so that the metal conductor 1 is kept taut. Then, the insulation layer of the metal conductor 1 is peeled off to expose the metal wire part of the metal conductor 1. Then, the metal conductor 1 is electrically connected to the electrical device.

[0041] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tension-type cross-linked polyethylene insulated cable, comprising a plurality of metal conductors (1) with insulating layers, wherein an insulating sleeve layer (2) is disposed between the outer sides of the plurality of metal conductors (1), characterized in that, Also includes: Fastening ring (3), the fastening ring (3) is sleeved on the outside of the insulating cylinder layer (2) for fastening the broken insulating cylinder layer (2). A bucket-shaped connecting sleeve (4) is provided, in which multiple metal conductors (1) extend into the bucket-shaped connecting sleeve (4). A flexible wrapping structure is provided between the bucket-shaped connecting sleeve (4) and the fastening ring (3). The flexible wrapping structure is used to wrap the metal conductors (1) and adapt to the connection angle between the metal conductors (1) and the power equipment. The protective housing (5) is connected to one side of the bucket-shaped connecting sleeve (4). The metal conductor (1) passes through the protective housing (5) and is connected to the power equipment. A conductor fixing bracket is provided inside the protective housing (5). One of the metal conductors (1) passes through the middle of the conductor fixing bracket. The remaining multiple metal conductors (1) are arranged circumferentially around the conductor fixing bracket. The metal conductor (1) and the conductor fixing bracket are provided with a conductor tensioning structure. A circular sealing plate (10) is fixedly connected inside the bucket-shaped connecting sleeve (4). One of the metal conductors (1) passes through the middle of the circular sealing plate (10). A cone-shaped flexible cylinder (11) is connected to the circumference of the circular sealing plate (10). The other metal conductors (1) all pass through the cone-shaped flexible cylinder (11). The conductor fixing bracket includes: A fixed support cylinder (12) is connected to the middle of the circular sealing plate (10). The fixed support cylinder (12) penetrates the protective shell (5), and one of the metal conductors (1) penetrates the fixed support cylinder (12). A U-shaped support frame (13) is fixedly connected to the circumference of the fixed support cylinder (12), and the U-shaped support frame (13) is located inside the protective shell (5).

2. The tensioned cross-linked polyethylene insulated cable according to claim 1, characterized in that, The flexible wrapping structure includes: The connecting ring sleeve (6) is fixedly connected to one end of the fastening ring sleeve (3) and the bucket-shaped connecting sleeve (4). The connecting ring sleeve (6) is provided with multiple arc-shaped connecting grooves (7). A flexible wrapping cylinder (8) is provided with rigid inserts (9) on both sides. The rigid inserts (9) extend into and are connected to multiple arc-shaped connecting slots (7) located on the same side. The metal conductor (1) extends into the flexible wrapping cylinder (8).

3. A tensioned cross-linked polyethylene insulated cable according to claim 2, characterized in that, The conductor tensioning structure includes: A cylindrical fastener, wherein the metal conductor (1) passes through the cylindrical fastener; Support plate (14), and two deformable metal bending members (15) are provided between the support plate (14) and the U-shaped support frame (13), and the two metal bending members (15) are interleaved; A clamp-type metal part (16) is provided between the cylindrical fixing part and the supporting piece (14), and the deformable clamp-type metal part (16) is provided.

4. A tensioned cross-linked polyethylene insulated cable according to claim 3, characterized in that, The cylindrical fastener includes: A flexible insulating sleeve (17) is sleeved on the outside of the metal conductor (1), and a plurality of tension grooves (18) are formed on the inner circumference of the flexible insulating sleeve (17). The fixing ring (19) is provided on the outer side of the flexible insulating sleeve (17).

5. A tensioned cross-linked polyethylene insulated cable according to claim 4, characterized in that, One of the metal bending parts (15) has a sheet-like protrusion (20) on its top, and the other metal bending part (15) has a fork-like protrusion (21) on its top. Both the sheet-like protrusion (20) and the fork-like protrusion (21) are fixedly connected to the support piece (14), and the sheet-like protrusion (20) is located inside the fork-like protrusion (21).

6. A tensioned cross-linked polyethylene insulated cable according to claim 5, characterized in that, The top and bottom of the clamp-type metal part (16) are provided with connecting end faces (22), and the two connecting end faces (22) are fixedly connected to the fixing ring (19) and the supporting piece (14) respectively.

7. A tensioned cross-linked polyethylene insulated cable according to claim 6, characterized in that, The protective housing (5) has multiple rectangular slots (23) for the metal conductor (1) to be moved out.

Images