Shielded frequency conversion power cable

Abstract

The utility model relates to the technical field of cables, in particular to a shielding variable-frequency power cable, which comprises a variable-frequency power cable sheath, a sealing sliding cylinder and a wire protection layer, the sealing sliding cylinder is fixedly sleeved on the outer side of the variable-frequency power cable sheath, a shielding power cable reinforcing pressure-proof structure is arranged on the inner side of the variable-frequency power cable sheath, and the wire protection layer is arranged on the outer side of the shielding power cable sheath. The reinforced anti-pressing structure of the shielding power cable comprises a shielding layer, an inner core layer and a supporting sheet, wherein the shielding layer is fixedly connected to the inside of the frequency conversion power cable sheath. According to the frequency conversion power cable with the shielding function, the inner core layer is made of relatively firm rubber, so that the effect of placing the cable reinforcing core is achieved, the tension-resistant and bending-resistant effects can be effectively provided, and the effect that a plurality of different frequency conversion power cable wire protection layers can be separated inside is adopted; and meanwhile, the anti-pressure capability of extruding the variable-frequency power cable conductor by external stress is reduced, so that the use of the shielded variable-frequency power cable is safer.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a shielded variable frequency power cable. Background Art

[0002] The structure of the frequency conversion cable includes three main insulated wires and three neutral insulated wires. An inner winding layer, a copper tape layer, an outer winding layer and an outer sheath layer are arranged in sequence outside the main insulated wires and the neutral insulated wires to form a 3+3 core structure. The cable has strong voltage impact resistance and can withstand the pulse voltage during high-speed and frequent frequency conversion, which plays a good protective role for frequency conversion electrical appliances.

[0003] For example, the authorization announcement number "CN220672261U" is named as a shielded variable frequency power cable. Although it has an elastic effect through the cooperation with the pull rope part, so that the ring can be put on the limit piece for fixation, and finally the excess part of the cable can be rolled up to avoid interference caused by dragging or shaking, but the existing shielded variable frequency power cable adopts a multi-layer variable frequency power cable shielding protection insulation structure under the cable rubber insulation skin. However, three or more wires need to pass through a variable frequency power cable at the same time. In this way, the multiple wires will be squeezed against each other when the external force is applied to the power cable. The multiple wires squeezed against each other can easily cause the internal protective layer to be damaged. Then, the conductors inside different cables contact each other, which can easily cause short circuit and heating problems, thereby causing danger and reducing the safety of the use of shielded variable frequency power cables. Utility Model Content

[0004] The utility model aims to solve the problem of low safety in the use of shielded variable frequency power cables, and proposes a shielded variable frequency power cable.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a shielded variable frequency power cable, comprising a variable frequency power cable outer sheath, a sealing slide and a wire protection layer, the sealing slide fixedly sleeved on the outside of the variable frequency power cable outer sheath, the inner side of the variable frequency power cable outer sheath is provided with a shielded power cable reinforced anti-pressure structure, the shielded power cable reinforced anti-pressure structure comprises a shielding layer, an inner core layer and a support sheet, the shielding layer is fixedly connected to the inside of the variable frequency power cable outer sheath, the inner core layer is fixedly connected to the inner side of the variable frequency power cable outer sheath, the inner side of the inner core layer is fixedly connected with a cable reinforcement core, the inner side of the cable reinforcement core is fixedly provided with a plurality of easy-to-cut ends, the outer wall of the cable reinforcement core is fixedly connected with a plurality of support sheets, and the other ends of the plurality of support sheets are fixedly connected to the inner wall of the shielding layer.

[0006] Preferably, a cable filler layer is fixedly provided inside the shielding layer, a plurality of conductor protection layers are fixedly provided inside the outer sheath of the variable frequency power cable, and the inner side of the cable filler layer is movably connected to the plurality of conductor protection layers.

[0007] Preferably, a cable conductor is fixedly connected to the inner side of the wire protection layer, and the outer side of the wire protection layer is arranged opposite to a plurality of support sheets.

[0008] Preferably, a steel wire layer is fixedly connected to one side of the sealing slide, and the steel wire layer is movably connected to the outer side of the outer sheath of the variable frequency power cable.

[0009] Preferably, a redundant cable clamping structure for power cables is provided above the sealing slide cylinder;

[0010] The redundant cable clamping structure of the power cable comprises a protrusion, a bolt and a spacer;

[0011] The protrusion is fixedly connected to the outer wall of the sealing slide, and a lower pressure seat is movably connected to the top of the protrusion. The inner side of the lower pressure seat is threadedly connected with a bolt, and the lower end of the bolt is threadedly connected to the top end of the protrusion. A clamping groove is fixedly opened on the inner side of the lower pressure seat, and the cushion block is fixedly connected to the side wall of the protrusion, and the top of the cushion block is arranged opposite to the inner side of the clamping groove.

[0012] Preferably, a wire splitter is fixedly connected to the front end of the sealing slide, and the inner side of the wire splitter is movably connected to the protective layers of multiple wires.

[0013] The utility model proposes a shielded variable frequency power cable, which has the beneficial effects of: the inner core layer is made of a relatively strong rubber to play the role of placing the cable reinforcement core, and the cable reinforcement core runs through the inside of the variable frequency power cable outer skin, which can effectively provide tensile and bending resistance. The support sheet is distributed in a circle on the outside of the cable reinforcement core, and the internal protective layer that can separate multiple different variable frequency power cable conductors is adopted, while reducing the compressive resistance of the variable frequency power cable conductors under external force squeezing, which directly makes the use of the shielded variable frequency power cable safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a partial three-dimensional schematic diagram of the utility model;

[0015] Figure 2 for Figure 1 A front cross-sectional schematic diagram of

[0016] Figure 3 for Figure 1 A side cross-sectional schematic diagram of

[0017] Figure 4 for Figure 2 Enlarged cross-sectional view of part A in the middle;

[0018] Figure 5 for Figure 2 Enlarged cross-sectional view of part B in the middle;

[0019] Figure 6 for Figure 3 Enlarged schematic diagram of part C in the middle.

[0020] In the figure: 1. outer skin of variable frequency power cable, 2. sealing slide, 3. splitter, 4. wire protection layer, 5. shielded power cable reinforced anti-pressure structure, 51. shielding layer, 52. inner core layer, 53. cable reinforcement core, 54. easy-to-cut end, 55. support sheet, 6. cable filler layer, 7. steel wire layer, 8. power cable excess cable clamping structure, 81. bump, 82. lower pressure seat, 83. bolt, 84. clamping groove, 85. pad, 9. cable conductor. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings:

[0022] See also Figure 1-6 A shielded variable frequency power cable comprises a variable frequency power cable sheath 1, a sealing slide 2 and a conductor protection layer 4. The sealing slide 2 is fixedly sleeved on the outer side of the variable frequency power cable sheath 1. The sealing slide 2 belongs to the prior art disclosed in the comparative document patent number "CN220672261U" and is named a shielded variable frequency power cable. A shielded power cable reinforcement anti-pressure structure 5 is provided on the inner side of the variable frequency power cable sheath 1. The shielded power cable reinforcement anti-pressure structure 5 comprises a shielding layer 51, an inner core layer 52 and a supporting sheet 55. The shielding layer 51 is fixedly connected to the inner side of the variable frequency power cable sheath 1. The shielding layer 51 is made of a silver-plated copper wire braided layer. The shielding layer 51 is evenly wrapped and wound on the inner side of the variable frequency power cable sheath 1, which can play an effective shielding effect. The inner core layer 52 is fixedly connected to the inner side of the variable frequency power cable sheath 1. The inner core layer 52 is made of a relatively strong rubber. The inner core layer 52 plays the role of placing a cable reinforcement core 53.

[0023] The cable reinforcement core 53 is made of copper-clad steel material with good toughness, not easy to break and can provide effective support. The cable reinforcement core 53 runs through the interior of the variable frequency power cable outer skin 1, and can effectively provide tensile and bending resistance. The inner side of the inner core layer 52 is fixedly connected with the cable reinforcement core 53. The inner side of the cable reinforcement core 53 is fixedly provided with a plurality of easy-to-cut ends 54. The easy-to-cut ends 54 are equidistantly provided on the cable reinforcement core 53. The easy-to-cut ends 54 can be conveniently cut together with the internal cable reinforcement core 53 when the variable frequency power cable is cut. The outer wall of the cable reinforcement core 53 is fixedly connected with a plurality of support sheets 55. The support sheets 55 are circumferentially distributed on the outer side of the cable reinforcement core 53, and the other end of the support sheet 55 is supported on the inner side of the shielding layer 51 to improve the pressure resistance. The other ends of the plurality of support sheets 55 are fixedly connected to the inner wall of the shielding layer 51.

[0024] The shielding layer 51 is made of a silver-plated copper wire braided layer, and the shielding layer 51 is evenly wrapped around the inner side of the variable frequency power cable sheath 1, which can achieve an effective shielding effect. The inner core layer 52 is made of a relatively strong rubber. The inner core layer 52 serves to place the cable reinforcement core 53. The cable reinforcement core 53 is made of copper-clad steel material with good toughness, not easy to break, and can provide effective support. The cable reinforcement core 53 runs through the interior of the variable frequency power cable sheath 1.

[0025] It can effectively provide tensile and bending resistance effects. Multiple easy-to-cut ends 54 are equidistantly arranged on the cable reinforcement core 53. The easy-to-cut ends 54 can be conveniently cut off together with the internal cable reinforcement core 53 when cutting the variable frequency power cable. The support sheet 55 is distributed in a circle on the outside of the cable reinforcement core 53, and the other end of the support sheet 55 is supported on the inside of the shielding layer 51 to improve the pressure resistance. The internal protective layer 4 that can separate multiple different variable frequency power cable conductors is used, and at the same time, the pressure resistance of the variable frequency power cable conductor under external force compression is reduced, which directly makes the use of shielded variable frequency power cables safer.

[0026] See also Figure 1-6 A cable filling layer 6 is fixedly arranged inside the shielding layer 51. The cable filling layer 6 is made of polyethylene material and has good heat resistance and stability. A plurality of wire protection layers 4 are fixedly arranged inside the outer skin 1 of the variable frequency power cable. The wire protection layer 4 can be made of a conventional rubber layer. The wire protection layer 4 surrounds the outside of the cable conductor 9 to reduce the occurrence of contact short circuit. The inner side of the cable filling layer 6 is movably connected to the plurality of wire protection layers 4. The inner side of the wire protection layer 4 is fixedly connected to the cable conductor 9. The outer side of the wire protection layer 4 is arranged opposite to the plurality of support sheets 55. A steel wire layer 7 is fixedly connected to one side of the sealing slide 2. The steel wire layer 7 is connected to one side of the sealing slide 2. The steel wire layer 7 can be fixed by winding the steel wire layer 7 around the outside of the variable frequency power cable outer skin 1. The steel wire layer 7 is movably connected to the outside of the variable frequency power cable outer skin 1.

[0027] See also Figure 1-6 A power cable redundant cable clamping structure 8 is provided above the sealing slide 2. The power cable redundant cable clamping structure 8 includes a protrusion 81, a bolt 83 and a cushion block 85. The protrusion 81 is fixedly connected to the outer wall of the sealing slide 2. A lower pressing seat 82 is movably connected above the protrusion 81. The inner side of the lower pressing seat 82 is threadedly connected with a bolt 83. The lower end of the bolt 83 is threadedly connected to the top of the protrusion 81. A clamping groove 84 is fixedly provided on the inner side of the lower pressing seat 82. After the two ends of the shielded variable frequency power cable are connected, an excess end of the cable may appear in the middle. At this time, the excess cable is folded and wound and then inserted between the lower pressing seat 82 and the cushion block 85.

[0028] By rotating and twisting the bolt 83 to move downward, the bolt 83 will push the lower pressure seat 82 downward, and the lower pressure seat 82 uses the inner clamping groove 84 to clamp the excess cable to prevent dragging on the ground or damage. The pad 85 is fixedly connected to the side wall of the protrusion 81, and the upper part of the pad 85 is arranged opposite to the inner side of the clamping groove 84. The front end of the sealing slide 2 is fixedly connected with the divider 3, and the inner side of the divider 3 is movably connected to the protective layer 4 of multiple wires.

[0029] Working principle:

[0030] When using shielded variable frequency power cables to connect variable frequency power supplies and variable frequency motors:

[0031] Internal reinforcement support structure of shielded variable frequency power cable:

[0032] The shielding layer 51 is made of a silver-plated copper wire braided layer, and the shielding layer 51 is evenly wrapped and wound around the inner side of the variable frequency power cable outer skin 1, which can play an effective shielding effect. The inner core layer 52 is made of a relatively strong rubber. The inner core layer 52 plays the role of placing the cable reinforcement core 53. The cable reinforcement core 53 is made of a copper-clad steel material with good toughness and not easy to break, which can provide effective support. The cable reinforcement core 53 runs through the inner side of the variable frequency power cable outer skin 1, which can effectively provide tension and bending resistance.

[0033] A plurality of easy-to-cut ends 54 are equidistantly arranged on the cable reinforcing core 53, and the easy-to-cut ends 54 can be conveniently cut off together with the internal cable reinforcing core 53 when cutting the variable frequency power cable, and the support sheet 55 is circumferentially distributed on the outside of the cable reinforcing core 53, and the other end of the support sheet 55 is supported on the inside of the shielding layer 51 to improve the pressure resistance, and the function of the internal protective layer 4 of the conductors of the variable frequency power cable is adopted;

[0034] Internal structure of shielded variable frequency power cable:

[0035] The cable filling layer 6 is made of polyethylene material, which has good heat resistance and stability. The wire protection layer 4 can be a conventional rubber layer. The wire protection layer 4 surrounds the outside of the cable conductor 9 to reduce the occurrence of contact short circuit. The inner side of the cable filling layer 6 is movably connected with multiple wire protection layers 4. The steel wire layer 7 is connected to one side of the sealing slide 2. The steel wire layer 7 is wound around the outside of the variable frequency power cable sheath 1 to achieve fixation.

[0036] Redundant cable clamping and fixing structure with shielded variable frequency power cable:

[0037] After both ends of the shielded variable frequency power cable are connected, there may be an excess end of the cable in the middle. At this time, fold and wrap the excess cable and then insert it between the lower pressure seat 82 and the cushion block 85. By rotating and tightening the bolt 83 to move downward, the bolt 83 will push the lower pressure seat 82 downward, and the lower pressure seat 82 will use the inner clamping groove 84 to clamp the excess part of the cable to prevent it from dragging on the ground or being damaged.

[0038] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A shielded variable frequency power cable, comprising a variable frequency power cable sheath (1), a sealing slide (2) and a conductor protection layer (4), characterized in that: The sealing slide (2) is fixedly sleeved on the outer side of the variable frequency power cable outer skin (1); the inner side of the variable frequency power cable outer skin (1) is provided with a shielded power cable reinforced anti-pressure structure (5); the shielded power cable reinforced anti-pressure structure (5) comprises a shielding layer (51), an inner core layer (52) and a support sheet (55); the shielding layer (51) is fixedly connected to the inside of the variable frequency power cable outer skin (1); the inner core layer (52) is fixedly connected to the inner side of the variable frequency power cable outer skin (1); a cable reinforcement core (53) is fixedly connected to the inner side of the inner core layer (52); a plurality of easy-to-cut ends (54) are fixedly provided on the inner side of the cable reinforcement core (53); a plurality of support sheets (55) are fixedly connected to the outer wall of the cable reinforcement core (53); the other ends of the plurality of support sheets (55) are fixedly connected to the inner wall of the shielding layer (51).

2. The shielded variable frequency power cable according to claim 1, characterized in that: A cable filling layer (6) is fixedly arranged inside the shielding layer (51), a plurality of conductor protection layers (4) are fixedly arranged inside the outer sheath (1) of the variable frequency power cable, and the inner side of the cable filling layer (6) is movably connected to the plurality of conductor protection layers (4).

3. The shielded variable frequency power cable according to claim 2, characterized in that: The inner side of the wire protection layer (4) is fixedly connected with a cable conductor (9), and the outer side of the wire protection layer (4) is arranged opposite to a plurality of support sheets (55).

4. The shielded variable frequency power cable according to claim 3, characterized in that: A steel wire layer (7) is fixedly connected to one side of the sealing slide cylinder (2), and the steel wire layer (7) is movably connected to the outer side of the variable frequency power cable sheath (1).

5. The shielded variable frequency power cable according to claim 4, characterized in that: A redundant cable clamping structure (8) for power cables is provided above the sealing slide cylinder (2); The redundant cable clamping structure (8) for power cables comprises a protrusion (81), a bolt (83) and a spacer (85); The protrusion (81) is fixedly connected to the outer wall of the sealing slide (2), and a lower pressure seat (82) is movably connected to the upper side of the protrusion (81), and a bolt (83) is threadedly connected to the inner side of the lower pressure seat (82), and the lower end of the bolt (83) is threadedly connected to the top end of the protrusion (81), and a clamping groove (84) is fixedly opened on the inner side of the lower pressure seat (82), and the cushion block (85) is fixedly connected to the side wall of the protrusion (81), and the upper side of the cushion block (85) is arranged opposite to the inner side of the clamping groove (84).

6. The shielded variable frequency power cable according to claim 5, characterized in that: The front end of the sealing slide cylinder (2) is fixedly connected to a wire splitter (3), and the inner side of the wire splitter (3) is movably connected to a plurality of wire protection layers (4).

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