A shielding cable for copper core frequency converter
By introducing a notch design for the connection section and butt joint section in the shielded cable of the copper core frequency converter, combined with the movable shell and sheath structure, the problems of tip discharge and oxidation caused by the exposure after the shielding layer is circumferentially cut are solved, a more stable grounding connection is achieved, and the safety and reliability of the cable are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU JIANGYANG CABLE
- Filing Date
- 2025-06-10
- Publication Date
- 2026-06-09
AI Technical Summary
When grounding, the shielding layer of the existing copper core frequency converter shielded cable is cut around, resulting in exposed cuts. This may lead to tip discharge and oxidation, poor connection stability, and affect the safety and stability of the grounding connection.
The shielding shell, which is equipped with connecting and mating sections, combined with a notch design, enables axial peeling of the shielding layer, enhances the integrity of the connection position, and improves connection stability through the movable shell and protective shell. The rubber layer and insulation layer enhance protection and anti-slip effect.
It improves the stability and safety of the shielding layer connection, reduces the risk of loosening during the pulling process, enhances the firmness of the grounding connection and prevents discharge phenomena, and improves the overall reliability of the cable.
Smart Images
Figure CN224342058U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to power cable technology, specifically a shielded cable for copper core frequency converters. Background Technology
[0002] The shielded cables used in copper core frequency converters typically contain a copper wire mesh braided layer, which enables the copper wire mesh to effectively prevent electromagnetic interference and provide a safe grounding function.
[0003] For example, the public announcement number: CN207217156U, the public announcement date: 2018-04-10, disclosed a special cable for frequency converters, which includes a first shielding layer made of nickel-zinc ferrite absorbing material located outside the core, a second shielding layer made of aluminum foil material, a protective sleeve and reinforcing ribs.
[0004] The shortcomings of existing technology are that when the cable end is used for grounding, the surface of the shielding layer needs to be circumferentially cut, and the wire core wrapped by the rubber layer inside the shielding layer needs to be pulled out from the cut to separate the shielding layer from the wire core (fork). This makes it easier to bind and fix the separated shielding layer and grounding wire with a constant force spring. However, since there is an obvious radial cut in the shielding layer after the circumferential cut, and the remaining connection part of the cut is used for grounding, the obviously exposed copper wire may experience tip discharge, interfering with the normal grounding path. It will also aggravate the oxidation of the copper wire end. In addition, there are fewer connection points after the circumferential cut, and the section pulled and bound for grounding is also prone to making the braid at the cut position looser, resulting in lower stability of the connection position, which in turn affects the safety of the connection position and the stability after grounding. Utility Model Content
[0005] The purpose of this invention is to provide a shielded cable specifically for copper core frequency converters to address the aforementioned shortcomings in the prior art.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A shielded cable for copper core frequency converters includes a cable with a wire core, a shielding shell on the outside of the wire core, a shielding layer on the outside of the shielding shell, a notch on the shielding shell, and a connecting section and a butt joint section at the end of the notch that abut against each other and are used to close the notch.
[0008] A notch is provided between the connecting section and the docking section to mate with the shielding layer.
[0009] As a further description of the above technical solution: the shielding shell is provided with a protective shell.
[0010] As a further description of the above technical solution: The protective shell is provided with symmetrically arranged movable shells with adjustable angles to it. When movable, the movable shells pull the connecting section and the docking section to move towards the protective shell.
[0011] As a further description of the above technical solution: the ends of the connecting section and the docking section are provided with creases that connect to the movable shell.
[0012] As a further description of the above technical solution: the connecting section and the docking section cooperate to clamp the shielding layer.
[0013] As a further description of the above technical solution: the connecting section and the docking section move towards each other, so that the end of the shielding layer extends into the shielding shell.
[0014] As a further description of the above technical solution: a rubber layer is provided on the outer side of the wire core.
[0015] As a further description of the above technical solution: a mating layer is provided on the outer side of the rubber layer.
[0016] As a further description of the above technical solution: the mating layer and the shielding shell are in contact and fit together.
[0017] As a further description of the above technical solution: an insulating layer is provided on the outside of the shielding layer, and a protective layer is provided on the outside of the insulating layer.
[0018] In the above technical solution, the copper core frequency converter shielded cable provided by this utility model has the following beneficial effects: the shielding layer has an axially cut guide groove through the notch, and then the shielding layer is peeled off along the axis and then separated from the cable, so that the connection position of the shielding layer has the original circumference, ensuring the contact surface of the connection position, and making the shielding layer have a more complete pulling range than the circumferential cutting, thereby reducing the loosening during the pulling process and making the grounding connection more stable. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.
[0020] Figure 1 A schematic diagram of the cable provided for an embodiment of this utility model;
[0021] Figure 2 A schematic diagram of the cable cross-section provided for an embodiment of this utility model;
[0022] Figure 3 for Figure 2Enlarged view of point A;
[0023] Figure 4 A schematic diagram of the shielding shell provided for an embodiment of this utility model;
[0024] Figure 5 This is a schematic diagram of the cross-section of the shielding shell after radial pressing, provided in an embodiment of the present invention.
[0025] Explanation of reference numerals in the attached figures:
[0026] 1. Cable; 11. Protective layer; 12. Insulation layer; 13. Shielding layer; 14. Butt joint layer; 15. Rubber layer; 16. Core wire; 2. Shielding shell; 21. Sheath; 22. Movable shell; 221. Connecting section; 222. Butt joint section; 23. Crease; 24. Notch. Detailed Implementation
[0027] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.
[0028] Please see Figures 1-5 This utility model provides a technical solution:
[0029] A shielded cable for copper core frequency converters includes a cable 1 with a wire core 16, a shielding shell 2 on the outside of the wire core 16, a shielding layer 13 on the outside of the shielding shell 2, a notch on the shielding shell 2, and a connecting section 221 and a butt joint section 222 at the end of the notch for abutting each other and for sealing the notch.
[0030] A notch 24 is provided between the connecting section 221 and the docking section 222 to cooperate with the shielding layer 13.
[0031] Specifically, the outer side of the conductor 16 is wrapped with insulating rubber to protect the metal core, which is existing technology and will not be described in detail here. The shielding shell 2 is specifically formed by bending an elastic metal sheet, and the shielding shell 2 is a rectangular sheet after being flattened. When it is formed on the cable 1, the shielding shell 2 is manually wrapped around the outside of the conductor 16.
[0032] Furthermore, the mating section 222 has a Z-shaped bent end, and the connecting section 221 abuts against the bent end of the mating section 222 (e.g., Figure 3 As shown in the figure, the notch 24 formed is the cutting position of the cutter.
[0033] By using the notch 24 parallel to the axis of the cable 1, the shielding layer 13 can have an axially cutting guide groove, allowing the cutter to apply pressure to the shielding layer 13 and act within the notch 24 (and due to the obstruction of the butt joint section 222, the cutter can prevent the inner cable 1 from being cut when applying pressure), thereby peeling the shielding layer 13 axially, and then separating it from the cable 1, so that the connection position of the shielding layer 13 has the original circumference, ensuring the contact surface at the connection position, and giving the shielding layer 13 a more complete pulling range than a circumferential cut, thereby reducing loosening during the pulling process and making the grounding connection more stable.
[0034] In another embodiment of the present invention, a protective shell 21 is provided on the shielding shell 2.
[0035] By reducing the angle between the outer wall of the casing 21 and its tangent, the casing 21 becomes flatter, which increases the area for binding and connecting with the grounding wire, thereby improving connection stability.
[0036] In another embodiment of the present invention, the protective shell 21 is provided with a symmetrically arranged movable shell 22 with an adjustable angle thereto. When the movable shell 22 is moved, it pulls the connecting section 221 and the docking section 222 toward the protective shell 21.
[0037] Specifically, such as Figure 5 As shown, the movable shell 22 is formed by bending at the end of the protective shell 21.
[0038] By bending the two movable shells 22 toward the inner wall of the protective shell 21, the connecting section 221 and the mating section 222 can be kept in contact, so that the entire shield shell 2 can maintain the integrity of the curved surface after being flattened, thereby maintaining the stability of the grounding connection.
[0039] In another embodiment of the present invention, the ends of the connecting segment 221 and the docking segment 222 are provided with creases 23 that are connected to the movable shell 22.
[0040] Specifically, crease 23 is parallel to the axis of cable 1.
[0041] The crease 23 allows the connecting section 221 and the mating section 222 to move closer to the inner wall of the protective shell 21, thereby enabling both the connecting section 221 and the mating section 222 to cooperate with the inner wall of the protective shell 21 to achieve a clamping function. This allows the grounding wire to be placed inside the flattened shield shell 2 and clamped. Then, a constant force spring can be tied at the connection gap between the grounding wire and the shield shell 2, which also increases the tightness of the grounding wire installation.
[0042] In another embodiment of the present invention, the connecting segment 221 and the docking segment 222 cooperate to clamp the shielding layer 13.
[0043] By staggering the connection section 221 and the docking section 222, the overlapping area of the two is increased, and the perimeter of the shielding shell 2 is reduced. This allows the shielding layer 13 with a constant perimeter to place both ends of the cut into the shielding shell 2 and be clamped by the connection section 221 and the docking section 222, thereby achieving the clamping and fixing of the shielding layer 13. Combined with the clamping of the grounding wire, the connection of the three is made tighter.
[0044] In another embodiment of the present invention, the connecting segment 221 and the docking segment 222 move toward each other, so that the end of the shielding layer 13 extends into the shielding shell 2.
[0045] The cut ends of the shielding layer 13 are also bent into the movable shell 22, thus keeping the two cut ends far apart, reducing the occurrence of discharge problems and improving safety.
[0046] In another embodiment of the present invention, a rubber layer 15 is provided on the outer side of the wire core 16.
[0047] The rubber layer 15, made of polyethylene or cross-linked polyethylene, provides more protection and wear resistance to the wire core 16.
[0048] In another embodiment of the present invention, a mating layer 14 is provided on the outer side of the rubber layer 15.
[0049] The mating layer 14, made of polyvinyl chloride and polypropylene, ensures a tight fit between the mating layer 14 and the shielding shell 2, and provides good anti-slip properties, allowing the shielding shell 2 to be stably installed on the outside of the mating layer 14.
[0050] In another embodiment of this utility model, the mating layer 14 abuts against the shielding shell 2.
[0051] The outer side of the docking layer 14 is also provided with a recess that is embedded with the protrusion of the docking section 222, which further enhances the ability to prevent circumferential displacement.
[0052] In another embodiment of the present invention, an insulating layer 12 is provided on the outside of the shielding layer 13, and a protective layer 11 is provided on the outside of the insulating layer 12.
[0053] The insulation layer 12, made of non-woven fabric or polyester tape and silicone rubber, provides basic insulation protection for the inner side of the cable 1, and the protective layer 11, made of silicone rubber and fluoroplastics, provides the cable 1 with high temperature resistance, corrosion resistance and low temperature resistance.
[0054] Working principle: The notch 24 is parallel to the axis of the cable 1, which enables the shielding layer 13 to have an axial cutting guide groove. The cutter applies pressure to the shielding layer 13 and acts in the notch 24, thereby peeling the shielding layer 13 axially and then separating it from the cable 1. This ensures that the connection position of the shielding layer 13 has the original circumference, ensuring the contact surface at the connection position. This makes the shielding layer 13 have a more complete pulling range than a circumferential cut. The connecting section 221 and the butt joint section 222 are staggered and inserted into each other, increasing their overlapping area and reducing the circumference of the shielding shell 2. This allows the shielding layer 13 with a constant circumference to place the two ends of the cut into the shielding shell 2 and be clamped by the connecting section 221 and the butt joint section 222, thus achieving the clamping and fixing of the shielding layer 13. Combined with the clamping of the grounding wire, the connection of the three is more compact.
[0055] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. A shielded cable specifically for copper-core frequency converters, characterized in that, The cable (1) includes a wire core (16), a shield (2) is provided on the outside of the wire core (16), a shield (13) is provided on the outside of the shield (2), a notch is provided on the shield (2), and a connecting section (221) and a butt joint section (222) are provided at the end of the notch to abut against each other and to close the notch. A notch (24) is provided between the connecting section (221) and the docking section (222) to cooperate with the shielding layer (13).
2. The shielded cable for copper core frequency converters according to claim 1, characterized in that, The shielding shell (2) is provided with a protective shell (21).
3. The shielded cable for copper core frequency converters according to claim 2, characterized in that, The protective shell (21) is provided with a symmetrically arranged movable shell (22) with an adjustable angle. When the movable shell (22) is in motion, it pulls the connecting section (221) and the docking section (222) toward the protective shell (21).
4. The shielded cable for copper core frequency converters according to claim 3, characterized in that, The ends of the connecting section (221) and the docking section (222) are provided with creases (23) that connect to the movable shell (22).
5. A shielded cable for copper core frequency converters according to claim 3, characterized in that, The connecting section (221) and the docking section (222) work together to hold the shielding layer (13).
6. The shielded cable for copper core frequency converters according to claim 3, characterized in that, The connecting section (221) and the docking section (222) move towards each other, so that the end of the shielding layer (13) extends into the shielding shell (2).
7. A shielded cable for copper core frequency converters according to claim 3, characterized in that, A rubber layer (15) is provided on the outside of the core (16).
8. A shielded cable for copper core frequency converters according to claim 7, characterized in that, A butt joint layer (14) is provided on the outside of the rubber layer (15).
9. A shielded cable for copper core frequency converters according to claim 8, characterized in that, The mating layer (14) and the shielding shell (2) are in contact and fit together.
10. A shielded cable for copper core frequency converters according to claim 8, characterized in that, An insulating layer (12) is provided on the outside of the shielding layer (13), and a protective layer (11) is provided on the outside of the insulating layer (12).